JP2000351940A - Coating composition for spraying, aerosol can and formation of coating membrane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject coating composition for spraying that sprays a photocatalyst to impart antifouling properties to a variety of parts in house hold appliances and internal finishing materials by spraying a mixture of a specific organosilane or the like, water and/or an organic solvent and a photocatalyst. SOLUTION: This coating composition comprises (A) at least one selected from an organosilane of the formula: (R1)nSi(OR2)4-n (R1 is a 1-8C monovalent organic group, R2 is a 1-5C alkyl, a 1-6C acyl; (n) is 0-2), its hydrolyzates and condensates (methyltrisiloxane or the like), (B) water and/or an organic solvent, for example, i-propyl alcohol or the like, and (C) a photocatalyst, for example, TiO2 or the like. In a preferred embodiment, the amount of water to be used is about 0.7-2 moles per mole of the structural unit represented by the formula: (R1)nSi(OR2)4-n, while the amount of the component C is 5-400 pts.wt. on the solid basis, per 100 pts.wt. of the structural unit represented by the formula: (R1)nSi(OR2)4-n/2 in the component A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for spraying a photocatalyst,
The present invention relates to a spray coating composition and an aerosol can filled with the coating composition, which can impart antifouling properties to various members such as housing equipment and interior materials.

[0002]

2. Description of the Related Art In recent years, there has been a demand for a coating composition which is excellent in weather resistance, stain resistance, and chemical resistance and can form a coating film having high hardness. Is required. Until now, as compositions comprising a silyl group-containing vinyl resin and an organosilane compound, Japanese Patent Application Laid-Open Nos.
Japanese Patent Application Laid-Open No. 69696/96, but in each case, the base material is limited. In addition, there are JP-A-04-108172 and JP-A-04-117473, all of which have wide target substrates, but do not specifically describe coating specifications.

On the other hand, technical development of organosilane-based coating materials has been promoted as a maintenance-free coating material having excellent weather (light) resistance and stain resistance. The performance requirements for such organosilane-based coating materials are becoming more and more severe. In recent years, coating film appearance, adhesion, weather resistance, heat resistance, alkali resistance, organic chemical resistance, moisture resistance, (temperature) resistance There is a need for a coating material that is excellent in water-based properties, insulation resistance, abrasion resistance, stain resistance, and the like, and that can form a coating film having high hardness.

In particular, it has been recognized that in order to improve the stain resistance, it is preferable to make the surface of the coating film hydrophilic. For example, a method of adding a hydrophilic substance or a water-soluble substance has been proposed. However, in such a method, it is difficult to maintain the hydrophilicity of the coating film surface at a sufficient level for a long period of time because the hydrophilic substance and the water-soluble substance gradually deteriorate with light or are washed away with water. is there.

In recent years, many coating compositions containing a photocatalytic component have been proposed.
Titanium oxide coating film-forming composition for photocatalyst comprising titanium oxide, hydrolyzable silicon compound (alkyl silicate or silicon halide) hydrolyzate, and solvent (water or alcohol) (JP-A-8-164334) , A silicon compound having at least two alkoxy groups, a titanium compound or zirconium compound having at least two alkoxy groups, and a hydrophilic inorganic powder such as titanium oxide treated with an alkoxysilane and / or polysiloxane having a guanidyl group A surface treatment composition for imparting antibacterial and antifungal properties (JP-A-8-176527), 20 to 200 parts by weight of tetraalkoxysilane, 100 parts by weight of trialkoxysilane and 0 to 100 parts of dialkoxysilane 60 parts by weight of raw material Method of forming an inorganic coating film and the polystyrene reduced weight average molecular weight to be manufactured is treated with coating an acid or an alkali derived from a mixture of powder having 900 or more inorganic coating and photocatalytic function (JP-A-8-259
No. 891).

However, these compositions and mixed solutions for forming a coating film are essentially composed of a photocatalyst component or an antibacterial and antifungal agent based on an alkoxysilane and / or polysiloxane component having a guanidyl group, deodorization and decomposition of harmful substances. In addition to these effects, the hardness, adhesion required for the organosilane-based coating material,
The film performance including alkali resistance, organic chemical resistance, weather resistance and stain resistance has not been comprehensively studied.

On the other hand, as a cog composition which satisfies the required performance of an organosilane-based coating material to some extent,
Composition containing a partial condensate of an organosilane, a dispersion of colloidal silica and a silicone-modified acrylic resin (Japanese Patent Application Laid-Open No. 60-135465), a condensate of an organosilane, a chelate compound of a zirconium alkoxide and a hydrolyzable silyl group (JP-A-64-1769), a composition comprising a condensate of organosilane, colloidal alumina and a hydrolyzable silyl group-containing vinyl resin (US Pat. , 904, 721) have been proposed.

However, Japanese Patent Application Laid-Open No. 60-1354 discloses
Coatings obtained from the compositions described in JP-A-65 and US Pat. No. 4,904,721 have the disadvantage that gloss is reduced by prolonged irradiation with ultraviolet light.
Further, the composition described in JP-A-64-1769 has a problem that storage stability is not sufficient, and when the solid content concentration is increased, gelation easily occurs in a short period of time.

Further, the applicant of the present application has already disclosed a hydrolyzate of an organosilane and / or a partial condensate thereof, a vinyl resin having a hydrolyzable and / or silyl group having a silicon atom bonded to a hydroxyl group, a metal chelate. A coating composition containing a compound and β-diketones and / or β-ketoesters has been proposed (JP-A-5-345877). The composition is used for an organosilane-based coating material. Although the required balance of the performance of the coating film is excellent, further improvement is also required for these performances.

Japanese Patent Application Laid-Open No. 8-165208 discloses a ceramic antibacterial agent having an average particle size of 0.3 μm or less, titanium dioxide having an average particle size of 0.2 μm or less, a surface treatment agent, a dispersion medium and a propellant. And a spray agent for germicidal, fungicide and odor prevention comprising a titanium dioxide having an average particle diameter of 0.2 μm or less, a surface treatment agent, a dispersion medium and a spray agent. Sprays for fungus / antifungal and soil decomposition have been proposed. However, these propellants have a problem that the obtained film has insufficient long-term durability.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional technical problems.
An object of the present invention is to provide a spray coating composition and an aerosol can filled with the coating composition, which can impart antifouling properties to various members such as housing equipment and interior materials.

[0012]

The present invention provides (I) (a)
The following general formula (1) (R¹)_nSi (OR^Two)_4-n ... (1) (where R¹Are the same or different when there are two
Represents a monovalent organic group having 1 to 8 carbon atoms;^TwoAre the same
Or different, an alkyl group having 1 to 5 carbon atoms or carbon number
Represents an acyl group of 1 to 6, and n is an integer of 0 to 2. )
An organosilane represented by the formula:
Selected from the group of decomposed products and condensates of the organosilane
At least one kind (hereinafter also referred to as “component (a) component”), (b
1) Water and / or an organic solvent (hereinafter referred to as “component (b1)”)
), And (c) a photocatalyst (hereinafter referred to as “(c)
Minute)) for spraying
Coating composition (hereinafter also referred to as “composition (I)”)
Is provided. Further, the present invention relates to (II)
(A) component, (b2) hydrolyzable group and / or hydroxyl
Containing a silyl group having a silicon atom bonded to the group
(Hereinafter referred to as “(b2) silyl group-containing polymer”) or
"(B2) component") and (c) a photocatalyst
Spray coating composition characterized by containing
(Hereinafter also referred to as “composition (II)”).
You. Further, the present invention provides (III) the component (a), (b)
3) Structural unit represented by the following general formula (2)(Where R^Three~ R^FiveIs C_mY_{2m + 1}, M = an integer from 0 to 5,
Y is independently selected from F, H and Cl
You. ) And / or a structure represented by the following general formula (3)
UnitWherein Rf is an alkyl group containing a fluorine atom or
A oxyalkyl group;^Three~ R^FiveIs the general formula (2)
It is synonymous and, within the same meaning, R of the general formula (2) ^Three~ R
^FiveAnd may be different. ] And hydrolyzable
Having a silicon atom bonded to a group and / or a hydroxyl group
At least one selected from the group of polymers containing a silyl group
(Hereinafter "(b3) silyl group-containing fluoropolymer" or
"(B3) component") and (c) a photocatalyst.
Spray coating composition characterized by containing
(Hereinafter, also referred to as “composition (III)”)
is there. Further, the present invention provides (IV) the component (a) and
(B2) a polymer containing the component (hereinafter referred to as “specific polymer”)
And (c) a photocatalyst dispersed in an aqueous medium
Spray comprising an aqueous dispersion comprising:
Coating composition (hereinafter also referred to as “composition (IV)”)
U).

Next, the present invention relates to the above compositions (I) to (I)
V) An aerosol can filled with any of the spray coating compositions is provided.

Next, the present invention provides the following (i):
(Ii) A method for forming a coating film, comprising forming a coating film comprising the composition of (iii) or (iv) and forming a coating film thereon using the aerosol can. Things. (I) A coating composition containing the component (a) and (b1) water and / or an organic solvent (hereinafter, also referred to as “composition (i)”). (Ii) A coating composition containing the component (a) and the component (b2) (hereinafter also referred to as “composition (ii)”). (Iii) A coating composition containing the component (a) and the component (b3) (hereinafter, also referred to as “composition (iii)”). (Iv) A coating composition containing an aqueous dispersion obtained by dispersing a specific polymer containing the component (a) and the component (b2) in an aqueous medium (hereinafter also referred to as “composition (iv)”). Say).

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, each component constituting the present invention will be sequentially described. Coating composition for spray composition (I) The composition (I) contains the above components (a), (b1) and (c) as main components. Component (a): Component (a) includes an organosilane (hereinafter referred to as “organosilane (1)”) represented by the above general formula (1), a hydrolyzate of organosilane (1), and organosilane (1). At least one selected from the condensates of
It is a seed and acts as a binder in the compositions of the present invention. That is, the component (a) may be only one of these three types, a mixture of any two types, or a mixture containing all three types. Here, the hydrolyzate of the above-mentioned organosilane (1) contains 2 to 4 O
It is not necessary that all R ² groups be hydrolyzed, and for example, it may be one having only one hydrolyzed, two or more being hydrolyzed, or a mixture thereof. The condensate of the organosilane (1) is formed by condensing a silanol group of a hydrolyzate of the organosilane (1) to form a Si—O—Si bond. It is not necessary that all are condensed, but only some of the silanol groups are condensed,
This is a concept that includes a mixture of different degrees of condensation.

In the general formula (1), R ¹ has 1 to ¹ carbon atoms.
Examples of the monovalent organic group of 8 include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group,
i-butyl group, sec-butyl group, t-butyl group, n-
Alkyl groups such as hexyl group, n-heptyl group, n-octyl group and 2-ethylhexyl group; acyl groups such as acetyl group, propionyl group, butyryl group, valeryl group, benzoyl group, trioil group and caproyl group; vinyl group;
In addition to allyl group, cyclohexyl group, phenyl group, epoxy group, glycidyl group, (meth) acryloxy group, ureido group, amide group, fluoroacetamide group, isocyanate group, and the like, and substituted derivatives of these groups. it can.

Examples of the substituent in the substituted derivative of R ¹ include a halogen atom, a substituted or unsubstituted amino group, a hydroxyl group, a mercapto group, an isocyanate group, a glycidoxy group, a 3,4-epoxycyclohexyl group, a (meth) An acryloxy group, a ureido group, an ammonium base and the like can be mentioned. However, the carbon number of R ¹ composed of these substituted derivatives is 8 or less including the carbon atom in the substituent. When two R ¹ are present in the general formula (1), they may be the same or different from each other.

Examples of the alkyl group having 1 to 5 carbon atoms for R ² include a methyl group, an ethyl group, an n-propyl group, an i-propyl group, an n-butyl group, a sec-butyl group and a t-butyl group. And an acyl group having 1 to 6 carbon atoms, for example, an acetyl group, a propionyl group, a butyryl group, a valeryl group, a caproyl group, and the like. A plurality of R ² in the general formula (1) may be the same or different from each other.

Specific examples of such an organosilane (1) include tetraalkoxysilanes such as tetramethoxysilane, tetraethoxysilane, tetra-n-propoxysilane, tetra-i-propoxysilane and tetra-n-butoxysilane. Class: methyltrimethoxysilane, methyltriethoxysilane, ethyltrimethoxysilane,
Ethyltriethoxysilane, n-propyltrimethoxysilane, n-propyltriethoxysilane, i-propyltrimethoxysilane, i-propyltriethoxysilane, n-butyltrimethoxysilane, n-butyltriethoxysilane, n-pentyl Trimethoxysilane, n-
Hexyltrimethoxysilane, n-heptyltrimethoxysilane, n-octyltrimethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, cyclohexyltrimethoxysilane, cyclohexyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, 3 -Chloropropyltrimethoxysilane, 3-chloropropyltriethoxysilane, 3,
3,3-trifluoropropyltrimethoxysilane,
3,3,3-trifluoropropyltriethoxysilane, 3-aminopropyltrimethoxysilane, 3-aminopropyltriethoxysilane, 2-hydroxyethyltrimethoxysilane, 2-hydroxyethyltriethoxysilane, 2-hydroxypropyltriethoxysilane Methoxysilane, 2-hydroxypropyltriethoxysilane, 3-
Hydroxypropyltrimethoxysilane, 3-hydroxypropyltriethoxysilane, 3-mercaptopropyltrimethoxysilane, 3-mercaptopropyltriethoxysilane, 3-isocyanatopropyltrimethoxysilane, 3-isocyanatopropyltriethoxysilane, 3- Glycidoxypropyltrimethoxysilane,
3-glycidoxypropyltriethoxysilane, 2-
(3,4-epoxycyclohexyl) ethyltrimethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltriethoxysilane, 3- (meth) acryloxypropyltrimethoxysilane, 3- (meth) atacryloxypropyltri Trialkoxysilanes such as ethoxysilane, 3-ureidopropyltrimethoxysilane and 3-ureidopropyltriethoxysilane; dimethyldimethoxysilane, dimethyldiethoxysilane, diethyldimethoxysilane, diethyldiethoxysilane,
n-propyldimethoxysilane, di-n-propyldiethoxysilane, di-i-propyldimethoxysilane, di-i-propyldiethoxysilane, di-n-butyldimethoxysilane, di-n-butyldiethoxysilane, −
n-pentyldimethoxysilane, di-n-pentyldiethoxysilane, di-n-hexyldimethoxysilane, di-n-hexyldiethoxysilane, di-n-heptyldimethoxysilane, di-n-heptyldiethoxysilane,
In addition to dialkoxysilanes such as di-n-octyldimethoxysilane, di-n-octyldiethoxysilane, di-n-cyclohexyldimethoxysilane, di-n-cyclohexyldiethoxysilane, diphenyldimethoxysilane and diphenyldiethoxysilane , Methyltriacetyloxysilane, dimethyldiacetyloxysilane, and the like.

Of these, trialkoxysilanes,
Dialkoxysilanes are preferable, and trialkoxysilanes are preferably methyltrimethoxysilane and methyltriethoxysilane. Further, dialkoxysilanes are preferably dimethyldimethoxysilane and dimethyldiethoxysilane.

In the present invention, as the organosilane (1), particularly, trialkoxysilane alone or
A combination of 40 to 95 mol% of trialkoxysilane and 60 to 5 mol% of dialkoxysilane is preferred. By using dialkoxysilane in combination with trialkoxysilane, the resulting coating film can be softened and alkali resistance can be improved.

The organosilane (1) is used as it is or as a hydrolyzate and / or condensate. When the organosilane (1) is used as a hydrolyzate and / or condensate, it can be hydrolyzed and condensed in advance and used as the component (a). However, as described later, the organosilane (1) is When preparing a composition by mixing with the remaining components, an appropriate amount of water (such as the component (b1))
Is added, the organosilane (1) is preferably hydrolyzed and condensed to obtain the component (a).
When the component (a) is used as a condensate, the polystyrene-equivalent weight average molecular weight (hereinafter referred to as “Mw”) of the condensate is preferably from 800 to 100,000, more preferably from 1,000 to 50,000. 000.

The commercially available products of the component (a) include MKC silicate manufactured by Mitsubishi Chemical Corporation, ethyl silicate manufactured by Colcoat, silicon resin manufactured by Dow Corning Toray, and silicon resin manufactured by Toshiba Silicone Co., Ltd. Resin, silicone resin manufactured by Shin-Etsu Chemical Co., Ltd., hydroxyl group-containing polydimethylsiloxane manufactured by Dow Corning Asia Co., Ltd., and silicon oligomer manufactured by Nippon Unica Co., Ltd. May be used.

In the present invention, the component (a) can be used alone or in combination of two or more.

Component (b1) The component (b1) comprises water and / or an organic solvent. The composition (I) of the present invention comprises:
The component (a), the component (b1), and the component (c) described below are essential, and optionally contain components (d) to (f) described below. Usually, when the composition is prepared, Water is added to cause the hydrolysis and condensation reaction of the organosilane (1) or to disperse the particulate components described below. The amount of water used in the present invention is (R ¹ ) _n SiO _{(4-n) / 2} [R ¹ and n in the component (a) conform to the above formula (1). same as below. Usually, 0.5 to 3 mol, preferably 1 mol of the structural unit represented by
It is about 0.7 to 2 mol.

The organic solvent is mainly composed of (a)
Component, the component (c) described below, and optional components (d) to (f)
Used to uniformly mix components and the like, adjust the total solid content of the composition, and at the same time, make it applicable to various coating methods, and further improve the dispersion stability and storage stability of the composition. .

The organic solvent is not particularly limited as long as it can uniformly mix the above components.
For example, alcohols, aromatic hydrocarbons, ethers, ketones, esters and the like can be mentioned.
Among these organic solvents, specific examples of alcohols include methanol, ethanol, n-propyl alcohol, i-propyl alcohol, n-butyl alcohol,
sec-butyl alcohol, t-butyl alcohol, n
-Hexyl alcohol, n-octyl alcohol, ethylene glycol, diethylene glycol, triethylene glycol, ethylene glycol monobutyl ether,
Examples thereof include ethylene glycol monoethyl ether acetate, diethylene glycol monoethyl ether, propylene glycol monomethyl ether, propylene monomethyl ether acetate, and diacetone alcohol.

Specific examples of aromatic hydrocarbons include benzene, toluene and xylene, specific examples of ethers include tetrahydrofuran and dioxane, and specific examples of ketones include acetone, methyl ethyl ketone, and the like. Specific examples of esters such as methyl isobutyl ketone and diisobutyl ketone include ethyl acetate, propyl acetate, butyl acetate, and propylene carbonate. These organic solvents can be used alone or in combination of two or more.

Component (c); component (c) is a photocatalyst,
Preferred photocatalysts include semiconductor powder and / or sol having photocatalytic ability.

As a semiconductor having photocatalytic ability, for example,
For example, TiO_Two, TiO_Three, SrTiO _Three, FeTi
O_Three, WO_Three, SnO_Two, Bi_TwoO_Three, In_TwoO_Three, Z
nO, Fe _TwoO_Three, RuO_Two, CdO, CdS, CdS
e, GaP, GaAs, CdFeO _Three, MoS_Two, La
RhO_Three, GaN, CdP, ZnS, ZnSe, ZnT
e, Nb_TwoO_Five, ZrO_Two, InP, GaAsP, In
GaAlP, AlGaAs, PbS, InAs, PbS
e, InSb and the like.
The new thing is TiO_Two, ZnO, and particularly preferred
Is a TiO containing anatase type structure_TwoIt is.

In the present invention, the photocatalytic activity of the component (c) renders the coating film surface hydrophilic in a short time even with weak light, and as a result, the other coating film performance is not substantially impaired. It became clear that the stain resistance of the coating film could be remarkably improved. Moreover, in the coating film obtained from the composition (I) of the present invention, the component (c) usually has a bond with the component (a) and the hydrophilicity and stain resistance of the coating film are long. Persisted for

The semiconductor is desirably used in the form of a powder and / or a sol. Specifically, it is desirable to adopt any one of the three modes of powder, an aqueous sol dispersed in water, a polar solvent such as isopropyl alcohol, and a solvent sol dispersed in a non-polar solvent such as toluene. In the case of a solvent-based sol, it may be further diluted with water or a solvent depending on the dispersibility of the semiconductor. The average particle size of the semiconductor in these existing forms is preferably as small as possible from the viewpoint of photocatalytic ability. In this case, when the average particle diameter of the semiconductor is 0.3 μm or more, the coating film tends to be opaque due to the light concealing action of the semiconductor. 0.3 μm
If it is less than 30, the coating film tends to be transparent. Therefore,
The average particle size of the semiconductor can be appropriately selected depending on the use of the composition.

When the component (c) is an aqueous sol or a solvent sol, the solid content concentration is preferably 50% by weight or less, more preferably 40% by weight or less.

As a method of blending the component (c) into the composition, the components (a) and (b1) described above and the component (d) described later are used.
May be added after the preparation of the composition comprising the components (f) to (f), or may be added during the preparation of the composition,
In the presence of the component (c), the component (a) and the like can be hydrolyzed and condensed. When the component (c) is added during the preparation of the composition, the semiconductor compound in the component (c) can be co-condensed with the component (a), and the long-term durability of the resulting coating film is particularly improved. When the component (c) is an aqueous sol, it is preferably added at the time of preparing the composition,
Further, even when the viscosity of the system increases due to the incorporation of the component (e) described below, it is preferable to add the component (c) when preparing the composition. Further, when the composition of the present invention is used as an enamel containing a coloring component, (c)
After the components are added to the composition, toning may be performed, or the component (c) and the coloring component may be simultaneously added to the composition.

In the present invention, the component (c) is used alone or as a mixture of two or more. The amount of the component (c) used is calculated as a solid content with respect to 100 parts by weight of the structural unit represented by (R ¹ ) _n SiO _{(4-n) / 2} in the component (a).
Usually, it is 1 to 500 parts by weight, preferably 5 to 400 parts by weight. If the amount is less than 1 part by weight, the antifouling effect due to the photocatalytic reaction may be insufficient, while if it exceeds 500 parts by weight, the film-forming properties of the obtained coating composition may decrease.

Composition (II) The composition (II) comprises the above components (a) and (c):
(B2) A composition containing a silyl group-containing polymer.

(B2) a silyl group-containing polymer; the component (b2) is a silyl group having a silicon atom bonded to a hydrolyzable group and / or a hydroxyl group (hereinafter referred to as a “specific silyl group”), preferably a polymer It consists of a polymer having terminal and / or side chains of the molecular chain. In the composition (II),
The component (b2) is a component that provides excellent coating performance by curing the coating film by co-condensing the hydrolyzable group and / or hydroxyl group in the silyl group with the component (a). . The content of the silicon atom in the component (b2) is usually 0.001 to 2 with respect to the entire component (b2).
0% by weight, preferably 0.01 to 15% by weight. Preferred specific silyl groups are groups represented by the following general formula (4).

[0038] (In the formula, X represents a hydrolyzable group such as a halogen atom, an alkoxyl group, an acetoxy group, a phenoxy group, a thioalkoxyl group, an amino group or a hydroxyl group, and R ⁶ represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms or Carbon number 1-10
Wherein i is an integer of 1 to 3. )

The component (b2) can be produced, for example, by the following method (a) or (b). (A) A hydrosilane compound corresponding to the above general formula (2) (hereinafter referred to as “hydrosilane compound (A)”) is a vinyl polymer having a carbon-carbon double bond (hereinafter referred to as “unsaturated vinyl polymer”). )).

(B) The following general formula (5) Wherein, X, R ^6, i has the same meaning as X, R ^6, i, respectively, in the general formula (2), R ⁷ represents an organic group having a polymerizable double bond. ] (Hereinafter referred to as "unsaturated silane compound (II)") and another vinyl monomer.

Examples of the hydrosilane compound (a) used in the above method (a) include halogenated silanes such as methyldichlorosilane, trichlorosilane and phenyldichlorosilane; methyldimethoxysilane, methyldiethoxysilane Alkoxysilanes such as phenyldimethoxysilane, trimethoxysilane, and triethoxysilane; acyloxysilanes such as methyldiacetoxysilane, phenyldiacetoxysilane, and triacetoxysilane; methyldiaminooxysilane, triaminoxysilane, and dimethyl. Examples thereof include aminoxysilanes such as aminoxysilane. These hydrosilane compounds (a) can be used alone or in combination of two or more.

The unsaturated vinyl polymer used in the above method (a) is not particularly limited as long as it is not a polymer having a hydroxyl group. For example, the following (a-1) and (a)
It can be manufactured by the method 2) or a combination thereof. (A-1) After (co) polymerizing a vinyl monomer having a functional group (hereinafter referred to as "functional group (α)"), the functional group (α) in the (co) polymer is replaced with the functional group (α). By reacting a functional group capable of reacting with the group (α) (hereinafter referred to as “functional group (β)”) with an unsaturated compound having a carbon-carbon double bond, carbon- A method for producing an unsaturated vinyl polymer having a carbon double bond.

(A-2) A radical polymerization initiator having a functional group (α) (for example, 4,4-azobis-4-cyanovaleric acid or the like) is used, or a radical polymerization initiator and a chain transfer agent are used. A vinyl monomer is (co) polymerized using a compound having a functional group (α) on both sides (eg, 4,4-azobis-4-cyanovaleric acid and dithioglycolic acid) to obtain a polymer. After synthesizing a (co) polymer having a functional group (α) derived from a radical polymerization initiator or a chain transfer agent at one or both ends of the molecular chain, the functional group (α) in the (co) polymer is synthesized. Is reacted with an unsaturated compound having a functional group (β) and a carbon-carbon double bond to form an unsaturated vinyl polymer having a carbon-carbon double bond at one or both ends of the polymer molecular chain. A method of manufacturing coalescence.

Examples of the reaction between the functional group (α) and the functional group (β) in the methods (a-1) and (a-2) include:
Esterification reaction between carboxyl group and hydroxyl group, ring-opening esterification reaction between carboxylic anhydride group and hydroxyl group, ring-opening esterification reaction between carboxyl group and epoxy group, amidation reaction between carboxyl group and amino group, carboxyl group Examples include a ring-opening amidation reaction between an acid anhydride group and an amino group, a ring-opening addition reaction between an epoxy group and an amino group, a urethanation reaction between a hydroxyl group and an isocyanate group, and a combination of these reactions.

Examples of the vinyl monomer having a functional group (α) include unsaturated carboxylic acids such as (meth) acrylic acid, crotonic acid, maleic acid, fumaric acid, and itaconic acid; maleic anhydride, itaconic anhydride Unsaturated carboxylic anhydrides such as acids; 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate,
Hydroxyl-containing vinyl monomers such as 3-hydroxypropyl (meth) acrylate, N-methylol (meth) acrylamide, and 2-hydroxyethyl vinyl ether; 2
Amino-containing vinyl monomers such as -aminoethyl (meth) acrylate, 2-aminopropyl (meth) acrylate, 3-aminopropyl (meth) acrylate, and 2-aminoethyl vinyl ether; 1,1,1-trimethylamine ( (Meth) acrylimide, 1-methyl-1-
Ethylamine (meth) acrylimide, 1,1-dimethyl-1- (2-hydroxypropyl) amine (meth) acrylimide, 1,1-dimethyl-1- (2′-phenyl-2′-hydroxyethyl) amine ( (Meth) acrylimide, 1,1-dimethyl-1- (2′-hydroxy-
Examples thereof include vinyl monomers containing an amine imide such as 2′-phenoxypropyl) amine (meth) acrylimide; vinyl monomers containing an epoxy group such as glycidyl (meth) acrylate and allyl glycidyl ether. These vinyl monomers having a functional group (α) can be used alone or in combination of two or more.

Examples of other vinyl monomers copolymerizable with the vinyl monomer having the functional group (α) include (a) styrene, α-methylstyrene, 4-methylstyrene, and 2-methylstyrene. Styrene, 3-methylstyrene, 4-
Methoxystyrene, 2-hydroxymethylstyrene, 4
-Ethylstyrene, 4-ethoxystyrene, 3,4-dimethylstyrene, 3,4-diethylstyrene, 2-chlorostyrene, 3-chlorostyrene, 4-chloro-3-methylstyrene, 4-t-butylstyrene, Aromatic vinyl monomers such as 1,4-dichlorostyrene, 2,6-dichlorostyrene and 1-vinylnaphthalene;

(B) Methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, i-butyl (meth) acrylate, amyl (meth) acrylate,
(meth) acrylate compounds such as i-amyl (meth) acrylate, hexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, and cyclohexyl methacrylate;

(C) divinylbenzene, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate, tetraethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, Dipropylene glycol di (meth) acrylate, tripropylene glycol di (meth) acrylate, tetrapropylene glycol di (meth) acrylate, butanediol di (meth) acrylate, hexanediol di (meth) acrylate, trimethylolpropane tri (meth) Polyfunctional monomers such as acrylates and pentaerythritol tetra (meth) acrylate;

(D) (meth) acrylamide, N-methylol (meth) acrylamide, N-methoxymethyl (meth) acrylamide, N-butoxymethyl (meth)
Acrylamide, N, N'-methylenebisacrylamide, diacetone acrylamide, maleic amide,
Acid amide compounds such as maleimide; (e) vinyl compounds such as vinyl chloride, vinylidene chloride and fatty acid vinyl ester; (f) 1,3-butadiene, 2-methyl-1,3-butadiene, 2,3-dimethyl-1 , 3-butadiene, 2-
Neopentyl-1,3-butadiene, 2-chloro-1,
3-butadiene, 2-cyano-1,3-butadiene, isoprene, substituted straight-chain conjugated pentadienes substituted with a substituent such as an alkyl group, a halogen atom, a cyano group, straight-chain and side-chain conjugated hexadienes, etc. An aliphatic conjugated diene;

(G) vinyl cyanide compounds such as acrylonitrile and methacrylonitrile; fluorine atom-containing monomers such as (thi) trifluoroethyl (meth) acrylate and pentadecafluorooctyl (meth) acrylate; (Meth) acryloyloxy-2,2,6
6-tetramethylpiperidine, 4- (meth) acryloylamino-2,2,6,6-tetramethylpiperidine,
4- (meth) acryloyloxy-1,2,2,6,6
-Piperidine monomers such as pentamethylpiperidine; and dicaprolactone. These can be used alone or in combination of two or more.

Examples of the unsaturated compound having a functional group (β) and a carbon-carbon double bond include, for example, vinyl monomers similar to vinyl monomers having a functional group (α) and the above-mentioned hydroxyl group. An isocyanate group-containing unsaturated compound obtained by reacting a vinyl monomer containing a diisocyanate compound with a diisocyanate compound in an equimolar amount.

Specific examples of the unsaturated silane compound ( _II ) used in the above method ( _II ) include CH ₂ ＣＨCHSi (CH ₃ ) (OCH ₃ ) ₂ and CH ₂ ＣＨCHSi (OCH ₃ ). ₃ , CH ₃ ＣＨCHSi (CH ₃ ) Cl ₂ , CH ₂ ＣＨCHSi
Cl ₃ , CH ₂ ＣＨCHCOO (CH ₂ ) ₂ Si (CH ₃ ) (OC
_{H 3) 2, CH 2 =} CHCOO (CH 2) 2 Si (OCH 3) 3, CH 2 = CHCOO (CH 2) 3 Si (CH 3) (OC
_{H 3) 2, CH 2 =} CHCOO (CH 2) 3 Si (OCH 3) 3, CH 2 = CHCOO (CH 2) 2 Si (CH 3) C
l ₂ , CH ₂ ＣＨCHCOO (CH ₂ ) ₂ SiCl ₃ , CH ₂ ＣＨCHCOO (CH ₂ ) ₃ Si (CH ₃ ) C
l ₂ , CH ₂ ＣＨCHCOO (CH ₂ ) ₃ SiCl ₃ , CH ₂ ＣC (CH ₃ ) COO (CH ₂ ) ₂ Si (C
H ₃ ) (OCH ₃ ) ₂ , CH ₂ ＣC (CH ₃ ) COO (CH ₂ ) ₂ Si (OCH
₃ ) ₃ , CH ₂ ＣC (CH ₃ ) COO (CH ₂ ) ₃ Si (C
H ₃ ) (OCH ₃ ) ₂ , CH ₂ ＣC (CH ₃ ) COO (CH ₂ ) ₃ Si (OCH
₃ ) ₃ , CH ₂ ＣC (CH ₃ ) COO (CH ₂ ) ₂ Si (C
_{H 3) Cl 2, CH 2} = C (CH 3) COO (CH 2) 2 SiCl 3, CH 2 = C (CH 3) COO (CH 2) 3 Si (C
H ₃ ) Cl ₂ , CH ₂ ＣC (CH ₃ ) COO (CH ₂ ) ₃ SiCl ₃ ,

[0053]

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The following can be mentioned. These can be used alone or in combination of two or more. Examples of other vinyl monomers to be copolymerized with the unsaturated silane compound (b) include, for example, vinyl monomers having a functional group (α) exemplified for the method (a-1) and other vinyl monomers. At least one vinyl monomer.

Other examples of the component (b2) include a specific silyl group-containing epoxy resin and a specific silyl group-containing polyester resin. The specific silyl group-containing epoxy resin is, for example, an epoxy group in an epoxy resin such as a bisphenol A type epoxy resin, a bisphenol F type epoxy resin, a hydrogenated bisphenol A type epoxy resin, an aliphatic polyglycidyl ether, and an aliphatic polyglycidyl ester. And aminosilanes having specific silyl groups, vinylsilanes, carboxysilanes, glycidylsilanes and the like. The specific silyl group-containing polyester resin is, for example, produced by reacting a carboxyl group or a hydroxyl group contained in the polyester resin with an aminosilane having a specific silyl group, a carboxysilane, a glycidylsilane, or the like. Can be.

The Mw of the component (b2) is preferably 2,0
00 to 100,000, more preferably 4,000 to
50,000. The amount of the component (b2) used in the composition (II) is determined by the amount of (R ¹ ) _n SiO in the component (a).
It is usually 2 to 900 parts by weight, preferably 10 to 400 parts by weight, more preferably 20 to 200 parts by weight, based on 100 parts by weight of the structural unit represented by _{(4-n) / 2} . In this case, if the amount of the component (b2) used is less than 2 parts by weight, the resulting coating film may have poor alkali resistance, while if it exceeds 900 parts by weight, the long-term weather resistance of the coating film may be reduced. Tend to.

As the polymerization method for producing the component (b2), for example, a method in which a monomer is added all at once, and a method in which a part of the monomer is polymerized, and then the remainder is continuously used. Or a method in which the monomer is continuously added from the beginning of the polymerization. Further, a polymerization method in which these polymerization methods are combined may be employed. Preferred polymerization methods include solution polymerization. As the solvent used for the solution polymerization, a usual solvent can be used, and among them, ketones and alcohols are preferable. In this polymerization, known polymerization initiators, molecular weight regulators, chelating agents and inorganic electrolytes can be used.

In the present invention, the component (b2) can be used alone or as a mixture of two or more kinds obtained as described above. In the composition (II), the component (b2) is preferably co-condensed with the component (a) in the presence of water and / or an organic solvent.

In the composition (II), the types and amounts of the component (a) and the component (c) are the same as those of the composition (I), and will not be described.

Composition (III) Composition (III) comprises the above components (a) and (c):
(B3) A composition containing a silyl group-containing fluoropolymer.

(B3) a silyl group-containing fluoropolymer;
(B3) The silyl group-containing fluoropolymer is represented by the structural unit represented by the general formula (2) (hereinafter also referred to as “(b3-1) structural unit”) and / or the general formula (3). A fluorine-based polymer having a specific structural group (hereinafter also referred to as “(b3-2) structural unit”) and having the specific silyl group at the terminal and / or the side chain of the polymer molecular chain. . When such a component (b3) hardens a coating film obtained from the composition of the present invention, the hydrolyzable group and / or the hydroxyl group in the specific silyl group is changed to the above-mentioned (a).
Co-condensation with the components can provide excellent coating performance. The content of the silicon atom in the component (b3) is usually 0.1 to 6 with respect to the entire component (b3).
0 mol%, preferably 0.5 to 50 mol%.

The component (b3) is a monomer (hereinafter also referred to as “(b3-1) monomer”) constituting the structural unit (b3-1) represented by the general formula (2) and / or A monomer constituting the (b3-2) structural unit represented by the general formula (3) (hereinafter, also referred to as “(b3-2) monomer”), and represented by the general formula (4) (B3-3) obtained by polymerizing a monomer (b3-3) containing a silicon atom bonded to a hydrolyzable group and / or a hydroxyl group, which constitutes a specific silyl group, and if necessary, (B3-4) Other monomers copolymerizable with these monomers (hereinafter referred to as “(b3
-4) also referred to as “monomer”). The (b3-4) monomer may have a fluorine atom which is not included in the (b3-1) monomer and the (b3-2) monomer.

The component (b3) may be a polymer obtained by polymerizing the monomer (b3-1) and / or the monomer (b3-2), or a polymer obtained by polymerizing these monomers. Depending on,
(B3-4) a silane compound having a functional group capable of reacting with a hydrolyzable group or a hydroxyl group at a carbon-carbon double bond of a polymer obtained by polymerization further including a monomer (hereinafter referred to as “(b3 -5) also referred to as “silane compound”).

(B3-1) Monomer; The (b3-1) monomer is represented by the following general formula (2) ′. (Wherein, R ^{3 to} R ⁵ are C _m Y _{2m + 1} , m is an integer of 0 to 5,
Y is independently selected from F, H and Cl. )

As the monomer (b3-1), for example,
For example, one polymerizable unsaturated double bond group and at least
And compounds having one fluorine atom.
You. (B3-1) Specific examples of the monomer include (a) CF_Two= CF_Two, CHF = CF_Two, CH_Two= CF
_Two, CH_Two= CHF, CCIF = CF_Two, CHCl = C
F_Two, CCl_Two= CF_Two, CCIF = CCLF, CHF
= CCl_Two, CH_Two= CCIF, CCl_Two= CCLF
Any fluoroethylenes; CF_ThreeCF = CF_Two, CF_Three
CF = CHF, CF_ThreeCH = CF_Two, CF_ThreeCF = CH
_Two, CF_ThreeCF = CHF, CHF_TwoCF = CHF, CF
_ThreeCH = CH_Two, CH_ThreeCF = CF_Two, CH_ThreeCH = C
F_Two, CH_ThreeCF = CH_Two, CF_TwoClCF = CF_Two,
CF_ThreeCCl = CF_Two, CF_ThreeCF = CFCl, CF_Two
ClCCl = CF_Two, CF_TwoClCF = CFCl, CF
_TwoCCl = CCIF, CF_TwoCCl = CCl_Two, CCl
_ThreeCF = CF_Two, CF_TwoClCCl = CCl_Two, CFC
l_TwoCCl = CCl_Two, CF_ThreeCF = CHCl, CCl
F_TwoCF = CHCl, CF_ThreeCCl = CHCl, CHF
_TwoCCl = CCl_Two, CF_TwoClCH = CCl_Two, CF
_TwoClCCl = CHCl, CCl_ThreeCF = CHCl etc.
(B) CF_ThreeCF_TwoCF = CF_Two, CF_ThreeCF = CFC
F_Three, CF_ThreeCH = CFCF_Three, CF_Two= CFCF_TwoC
HF_Two, CF_ThreeCF_TwoCF = CH_Two, CF_TwoCH = CH
CF_Three, CF_Two= CFCF_TwoCH_Three, CF_Two= CFCH
_TwoCH_Three, CF _ThreeCH_TwoCH = CH_Two, CF_ThreeCH = C
HCH_Three, CF_Two= CHCH_TwoCH_Three, CH_ThreeCF_TwoC
H = CH_Two, CFH_TwoCH = CHCFH_Two, CH_ThreeCF
_TwoCH = CH_Two, CH_Two= CFCH_TwoCH_Three, CF
_Three(CF_Two)_TwoCF = CF_Two, CF_Three(CF_Two)_TwoCF
= CF_TwoC4 or more fluoroolefins such as;
And the like.

These compounds containing a fluorine atom (b3-
1) The monomers may be used alone or in combination of two or more.

(B3-2) monomer; The (b3-2) monomer is represented by the following general formula (3) ′. [In the formula, Rf represents an alkyl group or an alkoxyalkyl group containing a fluorine atom, and R ^{3 to} R represent the general formula (2) ′
And within the same meaning, R ³ to R ³ of the general formula (2).
It may be different from R ⁵ . ]

Examples of the monomer (b3-2) include compounds having one polymerizable unsaturated double bond, an ether bond and at least one fluorine atom. (B3-2) Specific examples of the monomer include (a) CH ₂ ＣＨCH—O—Rf (Rf represents an alkyl group or an alkoxyalkyl group containing a fluorine atom) (fluoroalkyl) Vinyl ether or (fluoroalkoxyalkyl) vinyl ethers; (ii) perfluoro (methyl vinyl ether), perfluoro (ethyl vinyl ether), perfluoro (propyl vinyl ether), perfluoro (butyl vinyl ether), perfluoro (isobutyl vinyl ether)
(C) Perfluoro (alkoxyalkyl vinyl ether) such as perfluoro (propoxypropyl vinyl ether); and the like. These fluorine atom-containing (b3-2) monomers may be used alone or in combination of two or more.

The (b3-1) monomer and (b3-2)
When monomers are used in combination, it is preferable to use hexafluoropropylene in combination with perfluoroalkyl perfluorovinyl ether or perfluoroalkoxyalkyl perfluorovinyl ether.

(B3-3) Monomer; (b3-3) monomer has a polymerizable unsaturated double bond and a silicon atom bonded to a hydrolyzable group and / or a hydroxyl group in one molecule. It is a monomer contained. Examples of the (b3-3) monomer include the unsaturated silane compound (b) represented by the above general formula (5) used in the (b2) silyl group-containing polymer.

(B3-4) monomer; (b3-1) to
The (b3-3) monomer, which is another monomer copolymerizable with the (b3-3) monomer, is, for example, a “functional group (B2)” used in the production of the silyl group-containing polymer. and vinyl monomers having α).

(B3-5) silane compound; (b3-5) silane compound used in the addition reaction includes halogenated silanes such as methyldichlorosilane, trichlorosilane and phenyldichlorosilane; methyldiethoxysilane;
Methyldimethoxysilane, phenyldimethoxysilane,
Alkoxysilanes such as trimethoxysilane and triethoxysilane; acyloxysilanes such as methyldiacetoxysilane, phenyldiacetoxysilane, and triacetoxysilane; methylsilyloxysilane, triaminoxysilane, and dimethylaminoxysilane Examples include aminoxysilanes. These are 1
Species can be used alone or in combination of two or more.

As the polymerization method for producing the component (b3), for example, a method in which monomers are added in a lump and polymerization is performed, a part of the monomers are polymerized, and then the remainder is continuously processed. Or a method in which the monomer is continuously added from the beginning of the polymerization. Further, a polymerization method in which these polymerization methods are combined may be employed. Preferred polymerization methods include solution polymerization. As the solvent used for the solution polymerization, a usual solvent can be used, and among them, ketones and alcohols are preferable. In this polymerization, known polymerization initiators, molecular weight regulators, chelating agents and inorganic electrolytes can be used.

The total content of the constituent units (b3-1) and (b3-2) constituting the component (b3) is (b3)
3) In the component, it is usually 0.5 to 80 mol%, preferably 1 to 70 mol%. If the amount is less than 0.5 mol%, it may be difficult to obtain a well-balanced coating film having excellent transparency and adhesion. On the other hand, if it exceeds 80 mol%, the resulting coating film may have poor adhesion to the substrate. Among them, the content of the (b3-1) structural unit is (b3-1)
3) In the component, it is preferably 0.5 to 70 mol%. Further, the content of the (b3-2) structural unit is (b3)
In the components, it is preferably 0.5 to 70 mol%. Further, the content of the structural unit (b3-3) is such that the content of the specific silyl group in the component (b3) is usually 0.1 to 60 mol%, preferably 0.5 to 50 mol%. Amount. If it is less than 0.1 mol%, the effect of co-condensation with the component (a) cannot be obtained. On the other hand, if it exceeds 60 mol%, the storage stability of the obtained coating composition tends to be poor. In addition, it is another copolymerizable monomer (b3-4)
The structural unit composed of a monomer [(b3-4) structural unit] is
In the component (b3), the content is usually about 90 mol% or less, preferably about 80 mol% or less.

The Mw of the component (b3) is preferably 1,
000 to 100,000, more preferably 5,000
0 to 50,000.

In the composition (III), the component (b3)
They can be used alone or as a mixture of two or more obtained as described above.

The amount of the component (b3) used in the composition (III) is based on 100 parts by weight of the structural unit represented by (R ¹ ) _n SiO _{(4-n) / 2} in the component (a). Usually 20 to 50
0 parts by weight, preferably 25 to 400 parts by weight, more preferably 50 to 300 parts by weight. In this case, (b
If the amount of component 3) is less than 20 parts by weight, the resulting coating film tends to have reduced alkali resistance and crack resistance.
On the other hand, if it exceeds 500 parts by weight, the weather resistance of the coating film tends to decrease. In the composition (III), the component (b3) is preferably co-condensed with the component (a) in the presence of water and / or an organic solvent.

Further, in the present invention, another vinyl copolymer containing a specific silyl group, for example, the above-mentioned component (b2) may be used in combination with the component (b3) in a range that does not impair the effects of the present invention. May be used. The content of the other vinyl copolymer in the composition (III) is usually 500 parts by weight or less based on 100 parts by weight of the component (a).

In the composition (III), the types and amounts of the component (a) and the component (c) are the same as those of the composition (I), and will not be described.

Composition (IV) The composition (IV) of the present invention comprises a polymer (specific polymer) of the component (a) and the polymer (b2) containing a silyl group, and a component (c) containing an aqueous component. This is a composition containing an aqueous dispersion dispersed in a medium.

The aqueous dispersion used in the composition (IV) is
A specific polymer comprising (a) a polyorganosiloxane and (b2) a polymer containing a silyl group is dispersed in an aqueous medium. The specific polymer is dispersed, for example, in the form of particles or an aqueous sol, and the average particle diameter of the particles is usually 0.001 to 100 μm, preferably 0.1 to 100 μm.
001 to 1 μm. The aqueous medium in the aqueous dispersion is essentially composed of water, but may contain an organic solvent such as alcohol up to about several weight% in some cases.

The aqueous dispersion used in the present invention preferably comprises the component (a) and the component (b2), and
It is hydrolyzed and / or partially condensed in an organic solvent in the presence of an organic metal compound or the like and water, and the resulting reaction solution is dispersed in an aqueous medium, and then the organic solvent is removed. In the above method, water present at the time of hydrolysis and / or partial condensation is usually 0.5 to 3.0 mol, preferably about 0.5 to 2.0 mol, per 1 mol of the organosilane (1). is there.

When the reaction product is dispersed in the aqueous medium in the above method (c), an emulsifier and the like can be used. Examples of the emulsifier include alkyl sulfate salts, alkyl aryl sulfate salts,
Anionic surfactants such as alkyl phosphate esters and fatty acid salts; Cationic surfactants such as alkylamine salts and alkyl quaternary amine salts; polyoxyethylene alkyl ethers, polyoxyethylene alkyl aryl ethers, block polyethers Any of nonionic surfactants such as carboxylic acid type (for example, amino acid type and betaine type) and amphoteric surfactants such as sulfonic acid type can be used. These emulsifiers can be used alone or as a mixture of the above.

As the organic solvent used in the above method (c), for example, alcohols, hydrogens, ethers, ketones, esters and the like are suitable. These organic solvents and the reaction solution can be removed before being dispersed in the aqueous medium. The reaction conditions for the hydrolysis and / or partial condensation in the above method (c) are usually 4
The reaction time is usually 1 to 8 hours.

In the above method (c), when (b2) the silyl group-containing polymer has an acidic group such as a carboxyl group or a carboxylic acid anhydride group, at least one kind of base is obtained after hydrolysis and / or partial condensation. It is preferable to adjust the pH by adding a neutral compound. In the case where the (b2) silyl group-containing polymer has a basic group such as an amino group or an amine imide group, the pH is adjusted by adding at least one acidic compound after the hydrolysis and / or partial condensation. Is preferred. Further, when (b2) the silyl group-containing polymer has an acidic group and a basic group, after hydrolysis and / or partial condensation, at least one basic compound or an acidic compound is added depending on the ratio of these groups. By adjusting the pH by adding a compound, the hydrophilicity of the specific polymer obtained can be increased, and the emulsification and dispersibility of the specific polymer can be improved.

Examples of the basic compound include amines such as ammonia, methylamine, dimethylalimethylamine, ethylamine, diethylamine, triethylamine, ethanolamine, diethanolamine and dimethylaminoethanol; and alkali metal hydroxides such as sodium hydroxide and sodium hydroxide. Examples of the acidic compound include inorganic acids such as hydrochloric acid, phosphoric acid, sulfuric acid, and nitric acid; formic acid, acetic acid, propionic acid, lactic acid, oxalic acid, citric acid, adipic acid, and (meth) acid. Acrylic acid,
Organic acids such as maleic acid, fumaric acid, itaconic acid and the like can be mentioned. The pH value at the time of the above pH adjustment is usually 6-1.
0, preferably 7-8.

In the present invention, the above specific monomers can be used alone or as a mixture of two or more kinds obtained as described above. In the composition (IV),
The types and amounts of the component (a) and the polymer (b2) containing a silyl group and the component (c) used in the specific polymer are the same as those of the above-mentioned composition (I) and composition (II), and therefore are omitted. I do.

As described above, the compositions (I) to (IV) of the present invention
A film with excellent antifouling properties, durability and transparency and a photocatalytic function can be obtained, but in order to prevent deterioration of the substrate (film) due to the photocatalyst and obtain a coating film with excellent long-term durability adhesion, It is desirable to undercoat any one selected from the group of the compositions (i) to (iv) on the film. Here, the composition (i) is the composition (I), the composition (ii) is the composition (II), and the composition (ii)
i) corresponds to the composition (III), and the composition (iv) corresponds to the composition (IV), and each of the compositions [(I) to (I)
V)] except for the component (c). And
In these compositions (i) to (iv), the type and amount of each component are the same as those of the composition (I) except that the component (c) is not contained.
Since this is the same as (IV) to (IV), the description is omitted.

The compositions (I) to (IV) of the present invention and the compositions (i) to (iv) for undercoating which are used if necessary are further provided with the following (d) to (f), respectively. ) Components can be blended. Hereinafter, these components will be described.

Component (d): Component (d) is a catalyst that promotes the hydrolysis / condensation reaction of component (a), component (b2), component (b3), and the like. By using the component (d), the curing speed of the obtained coating film is increased, and the molecular weight of the polysiloxane resin produced by the polycondensation reaction of the organosilane component used is increased, so that strength, long-term durability, etc. In addition, it is possible to obtain an excellent coating film, and it is easy to increase the thickness of the coating film and to perform a coating operation.

The component (d) includes an acidic compound, an alkaline compound, a salt compound, an amine compound, an organometallic compound, and / or a partial hydrolyzate thereof (hereinafter, referred to as a “hydrolyzate”).
Organometallic compounds and / or partial hydrolysates thereof are collectively referred to as “organometallic compounds or the like”). Examples of the acidic compound include acetic acid, hydrochloric acid, sulfuric acid, phosphoric acid, alkyltitanic acid, p-toluenesulfonic acid, and phthalic acid, and acetic acid is preferred. Examples of the alkaline compound include sodium hydroxide and potassium hydroxide, and preferably sodium hydroxide. Further, as the salt compound, for example, naphthenic acid, octylic acid,
Examples thereof include alkali metal salts such as nitrous acid, sulfurous acid, aluminate, and carbonic acid.

Examples of the amine compound include ethylenediamine, hexamethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, piperidine, piperazine, m-phenylenediamine, p-phenylenediamine, ethanolamine, triethylamine, and the like. -Aminopropyl-trimethoxysilane, 3-aminopropyl-triethoxysilane, 3- (2-aminoethyl) -aminopropyl-trimethoxysilane, 3- (2-aminoethyl) -aminopropyl-triethoxysilane, 3 -(2-aminoethyl) -aminopropylmethyldimethoxysilane, 3
-Anilinopropyl trimethoxysilane, alkylamine salts, quaternary ammonium salts, and various modified amines used as a curing agent for epoxy resins, and the like, preferably 3-aminopropyl trimethoxysilane. , 3-aminopropyl-triethoxysilane, and 3- (2-aminoethyl) -aminopropyl-trimethoxysilane.

Examples of the organometallic compound include a compound represented by the following general formula (6) (hereinafter referred to as “organometallic compound (6)”), a compound having 1 to 1 carbon atoms bonded to the same tin atom. Examples thereof include organometallic compounds of tetravalent tin having 1 to 2 alkyl groups of 10 (hereinafter, referred to as “organotin compounds”), and partially hydrolyzed products of these compounds.

M (OR ⁸ ) _r (R ⁹ COCHCOR ¹⁰ ) _s (6) [wherein M represents zirconium, titanium or aluminum, and R ⁸ and R ⁹ are the same or different and are ethyl groups 1 to 6 carbon atoms such as n-propyl group, i-propyl group, n-butyl group, sec-butyl group, t-butyl group, n-pentyl group, n-hexyl group, cyclohexyl group and phenyl group. R ¹⁰ represents a divalent hydrocarbon group;
In addition to the same monovalent hydrocarbon groups having 1 to 6 carbon atoms as R ⁸ and R ⁹ , methoxy, ethoxy, n-propoxy, i-propoxy, n-butoxy, sec-butoxy, t -Represents an alkoxyl group having 1 to 16 carbon atoms such as a butoxy group, a lauryloxy group and a stearyloxy group, r and s are integers of 0 to 4, and (r + s) = (valence of M). ]

Specific examples of the organometallic compound (6) include (a) tetra-n-butoxyzirconium and tri-n-
Butoxy ethyl acetoacetate zirconium, di-
n-butoxybis (ethylacetoacetate) zirconium, n-butoxytris (ethylacetoacetate) zirconium, tetrakis (n-propylacetoacetate) zirconium, tetrakis (acetylacetoacetate) zirconium, tetrakis (ethylacetoacetate) zirconium, etc. Organic zirconium compounds;

(B) Tetra-i-propoxytitanium, di-i-propoxybis (ethylacetoacetate) titanium, di-i-propoxybis (acetylacetate) titanium, di-i-propoxybis (acetylacetone) Organic titanium compounds such as titanium; (c) tri-i-propoxyaluminum, di-i-propoxyethyl acetoacetate aluminum,
aluminum i-propoxy acetylacetonate,
i-propoxybis (ethylacetoacetate) aluminum, i-propoxybis (acetylacetonate) aluminum, tris (ethylacetoacetate)
Organic aluminum compounds such as aluminum, tris (acetylacetonate) aluminum, and monoacetylacetonate bis (ethylacetoacetate) aluminum; and the like.

Among these organometallic compounds (6) and partial hydrolysates thereof, tri-n-butoxyethylacetoacetate zirconium, di-i-propoxybis (acetylacetonato) titanium, di-i-propoxy・ Ethyl acetoacetate aluminum, tris (ethyl acetoacetate) aluminum, or
Partial hydrolysates of these compounds are preferred.

Further, specific examples of the organotin compound include:
(C ₄ H ₉ ) ₂ Sn (OCOC ₁₁ H ₂₃ ) ₂ , (C
_{4 H 9) 2 Sn (OCOCH} = CHCOOCH 3) 2,
(C ₄ H ₉ ) ₂ Sn (OCOCH = CHCOOC
_{4 H 9) 2, (C} 8 H 17) 2 Sn (OCOC
₈ H ₁₇ ) ₂ , (C ₈ H ₁₇ ) ₂ Sn (OCOC
_{11 H 23) 2, (C} 8 H 17) 2 Sn (OCOCH = CHC
OOCH ₃ ) ₂ , (C ₈ H ₁₇ ) ₂ Sn (OCOCH = C
HCOOC ₄ H ₉ ) ₂ , (C ₈ H ₁₇ ) ₂ Sn (OCOC
H = CHCOOC ₈ H ₁₇ ) ₂ , (C ₈ H ₁₇ ) ₂ Sn (O
COCH = CHCOOC ₁₆ H ₃₃ ) ₂ , (C ₈ H ₁₇ ) ₂ S
n (OCOCH = CHCOOC ₁₇ H ₃₅ ) ₂ , (C
₈ H ₁₇ ) ₂ Sn (OCOCH = CHCOOC
_{18 H 37) 2, (C} 8 H 17) 2 Sn (OCOCH = CHC
OOC ₂₀ H ₄₁ ) ₂ ,

[0099] (C ₄ H ₉ ) Sn (OCOC ₁₁ H ₂₃ ) ₃ , (C ₄ H ₉ )
Carboxylic acid type organotin compounds such as Sn (OCONa) ₃ ;

(C ₄ H ₉ ) ₂ Sn (SCH ₂ COOC _{8
H 17) 2, (C 4} H 9) 2 Sn (SCH 2 CH 2 COO
C ₈ H ₁₇ ) ₂ , (C ₈ H ₁₇ ) ₂ Sn (SCH ₂ COOC)
₈ H ₁₇ ) ₂ , (C ₈ H ₁₇ ) ₂ Sn (SCH ₂ CH ₂ CO
OC ₈ H ₁₇ ) ₂ , (C ₈ H ₁₇ ) ₂ Sn (SCH ₂ COO)
C ₁₂ H ₂₅ ) ₂ , (C ₈ H ₁₇ ) ₂ Sn (SCH ₂ CH ₂ C)
OOC ₁₂ H ₂₅ ) ₂ , (C ₄ H ₉ ) Sn (SCOCH = C
HCOOC ₈ H ₁₇ ) ₃ , (C ₈ H ₁₇ ) Sn (SCOCH)
ＣＨCHCOOC ₈ H ₁₇ ) ₃ ,

[0101] Mercaptide-type organotin compounds such as;

(C ₄ H ₉ ) ₂ Sn = S, (C ₈ H ₁₇ ) ₂
Sn = S, Sulfide-type organotin compounds such as;

(C ₄ H ₉ ) SnCl ₃ , (C ₄ H ₉ ) ₂
SnCl ₂ , (C ₈ H ₁₇ ) ₂ SnCl ₂ , (C ₄ H ₉ ) ₂ S
organic tin oxides such as nO and (C ₈ H ₁₇ ) ₂ SnO, and reaction products of these organic tin oxides with ester compounds such as silicate, dimethyl maleate, diethyl maleate and dioctyl phthalate. Can be.

The component (d) can be used alone or as a mixture of two or more kinds, and can also be used as a mixture with a zinc compound or another reaction retarder.

The component (d) may be blended when preparing the composition, or may be blended with the composition at the stage of forming a coating film. May be blended in both stages. The amount of the component (d) used is
In the case other than an organometallic compound or the like, (R)
¹⁾ with respect to _{n SiO (4-n) /} 2 in the structural unit 100 parts represented generally 0 to 100 parts by weight, preferably, 0.
01 to 80 parts by weight, more preferably 0.1 to 50 parts by weight. In the case of an organometallic compound or the like, it is represented by (R ¹ ) _n SiO _{(4-n) / 2} in the component (a). Structural unit 10
0 to 100 parts by weight, preferably 0.1 to 80 parts by weight, more preferably 0.5 to 100 parts by weight, based on 0 parts by weight.
50 parts by weight. In this case, the amount of the component (d) used is 1
If the amount is more than 00 parts by weight, the storage stability of the composition tends to decrease, and cracks tend to occur in the coating film.

Component (e): The component (e) is represented by the following general formula (7): R ⁹ COCH ₂ COR ¹⁰ (7) wherein R ⁹ and R ¹⁰ are Is the same as R ⁹ and R ^{10 in} each of the above general formulas], respectively. At least one. Such a component (e) is particularly preferably used together when an organometallic compound or the like is used as the component (d).

The component (e) functions as a stability improver for the composition. That is, the component (e) coordinates with a metal atom of the above-mentioned organometallic compound or the like to promote the co-condensation reaction of the above-mentioned component (a) with the component (b2) or component (b3) by the organometallic compound or the like. It is presumed that by appropriately controlling, the action of further improving the storage stability of the resulting composition is achieved.

Specific examples of component (e) include acetylacetone, methyl acetoacetate, ethyl acetoacetate, n-propyl acetoacetate, i-propyl acetoacetate, n-butyl acetoacetate, and sec-butyl acetoacetate. Tert-butyl acetoacetate, hexane-2,4-dione, heptane-2,4-dione, heptane-3,5-dione,
Octane-2,4-dione, nonane-2,4-dione,
5-methylhexane-2,4-dione, malonic acid, oxalic acid, phthalic acid, glycolic acid, salicylic acid, aminoacetic acid, iminoacetic acid, ethylenediaminetetraacetic acid, glycol, catechol, ethylenediamine, 2,2-bipyridine, 1,10 -Phenanthroline, diethylenetriamine, 2-ethanolamine, dimethylglyoxime, dithizone, methionine, salicylaldehyde and the like. Of these, acetylacetone and ethyl acetoacetate are preferred. The component (e) can be used alone or in combination of two or more.

The amount of component (e) used is usually 2 mol per mol of the organometallic compound in the above-mentioned organometallic compound.
Mol or more, preferably 3 to 20 mol. in this case,
If the amount of the component (e) is less than 2 mol, the effect of improving the storage stability of the obtained composition tends to be insufficient.

Component (f): The component (f) is composed of a powder and / or a sol or a colloid of an inorganic compound having no photocatalytic activity, and is blended according to the desired properties of the coating film. The average particle size of the component (f) is preferably 30 μm or less, more preferably 0.05 to 20 μm, and further preferably 0.05 to 10 μm. When the average particle size exceeds 30 μm, clogging of a nozzle or the like tends to occur when the obtained coating composition is spray-coated.

Specific examples of the compound constituting the component (f)
Is SiO_Two, Al_TwoO_Three, AlGaAs, Al (O
H)_Three, Sb_TwoO_Five, Si_ThreeN_Four, Sn-In_TwoO_Three,
Sb-In_TwoO_Three, MgF, CeF_Three, CeO_Two, 3A
l_TwoO_Three・ 2SiO_Two, BeO, SiC, AlN, F
e, Co, Co-FeO_x, CrO_Two, Fe_FourN, Ba
TiO_Three, BaO-Al_TwoO_Three-SiO_Two, Ba Blow
Site, SmCO_Five, YCO_Five, CeCO_Five, PrC
O_Five, Sm_TwoCO₁₇, Nd_TwoFe₁₄B, Al_FourO_Three, Α
-Si, SiN_Four, CoO, Sb-SnO_Two, Sb_TwoO
_Five, MnO_Two, MnB, Co_ThreeO_Four, Co_ThreeB, LiT
aO_Three, MgO, MgAl_TwoO_Four, BeAl_TwoO_Four, Z
rSiO_Four, ZnSb, PbTe, GeSi, FeSi
_Two, CrSi_Two, CoSi_Two, MnSi_1.73, Mg_TwoS
i, β-B, BaC, BP, TiB_Two, ZrB_Two, Hf
B_Two, Ru_TwoSi_Three, TiO_Two(Rutile type), Ti
O_Three, PbTiO _Three, Al_TwoTiO_Five, Zn_TwoSi
O_Four, Zr_TwoSiO_Four, 2MgO_Two-Al_TwoO _Three-5S
iO_Two, Nb_TwoO_Five, Li_TwoO-Al_TwoO_Three-4SiO
_Two, Mg ferrite, Ni ferrite, Ni-Zn ferrite
Light, Li ferrite, Sr ferrite, etc.
be able to. These components (f) may be used alone or in combination.
These can be used in combination.

The component (f) may be in the form of a powder, an aqueous sol or colloid dispersed in water, a polar solvent such as isopropyl alcohol, or a solvent sol or colloid dispersed in a nonpolar solvent such as toluene. There is. In the case of a solvent-based sol or colloid, depending on the dispersibility of the semiconductor, it may be further diluted with water or a solvent, or may be used after being surface-treated to improve the dispersibility.

When the component (f) is an aqueous sol or colloid, or a solvent sol or colloid, the solid concentration is preferably 40% by weight or less.

As a method of blending the component (f) into the composition, the component (f) may be added after the preparation of the composition, or may be added during the preparation of the composition, and the component (f) may be added to the composition (a). It may be co-hydrolyzed and condensed with the component, the component (b2), the component (b3) or the above condensate.

The amount of the component (f) used is determined by the structural unit 100 (R ¹ ) _n SiO _{(4-n) / 2} in the component (a).
Parts by weight, on a solid basis, usually from 0 to 500 parts by weight,
Preferably, it is 0.1 to 400 parts by weight.

Other additives; Also, the composition of the present invention includes:
A filler may be separately added and dispersed for coloring or thickening the obtained coating film. Such fillers include, for example, water-insoluble organic pigments and inorganic pigments, other than pigments, such as particulate, fibrous or scaly ceramics, metals or alloys, and oxides and hydroxides of these metals. , Carbides, nitrides, sulfides and the like.

Specific examples of the filler include iron, copper, aluminum, nickel, silver, zinc, ferrite, carbon black, stainless steel, silicon dioxide, titanium oxide for pigments, aluminum oxide, chromium oxide, manganese oxide, and manganese oxide. Iron, zirconium oxide, cobalt oxide, synthetic mullite, aluminum hydroxide, iron hydroxide, silicon carbide,
Silicon nitride, boron nitride, clay, diatomaceous earth, slaked lime, gypsum, talc, barium carbonate, calcium carbonate, magnesium carbonate, barium sulfate, bentonite, mica,
Zinc green, chrome green, cobalt green, viridian, guinea green, cobalt chrome green, shale green, green earth, manganese green, pigment green, ultramarine blue, navy blue, pigment green, rock ultramarine, cobalt blue, cerulean blue, copper borate, Molybdenum blue, copper sulfide, cobalt purple, mars purple, manganese purple, pigment violet, lead oxide, calcium lead oxide, zinc yellow, lead sulfide, chrome yellow, loess, cadmium yellow, strontium yellow, titanium yellow, litharge,
Pigment yellow, cuprous oxide, cadmium red, selenium red, chrome vermillion, red iron, zinc white, antimony white, basic lead sulfate, titanium white, lithopone, lead silicate,
Zircon oxide, tungsten white, lead, zinc white, bunchesone white, lead phthalate, manganese white, lead sulfate, graphite, bone black, diamond black, thermatomic black, vegetable black, potassium titanate whisker, molybdenum disulfide, etc. Can be mentioned. These fillers can be used alone or in combination of two or more. The amount of the filler used is based on 100 parts by weight of the total solid content of the composition.
Usually, it is 300 parts by weight or less.

The composition of the present invention may further contain, if desired, a known dehydrating agent such as methyl orthoformate, methyl orthoacetate and tetraethoxysilane; polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene. Fatty acid ester, polycarboxylic acid type polymer surfactant, polycarboxylate, polyphosphate, polyacrylate, polyamide ester salt,
Dispersants such as polyethylene glycol; methyl cellulose, ethyl cellulose, hydroxyethyl cellulose,
Celluloses such as hydroxypropylcellulose and hydroxypropylmethylcellulose; castor oil derivatives; thickeners such as ferrosilicate; ammonium carbonate;
Inorganic blowing agents such as ammonium bicarbonate, ammonium nitrite, sodium borohydride and calcium azide; azo compounds such as azobisisobutyronitrile; hydrazine compounds such as diphenylsulfone-3,3'-disulfohydrazine; semicarbazide compounds , A triazole compound, an N-nitroso compound, and other additives, as well as other additives such as a surfactant, a silane coupling agent, a titanium coupling agent, and a dye. In particular, the undercoating compositions (i) to (iv) may be blended with an ultraviolet absorber, an ultraviolet stabilizer and the like for the purpose of improving weather resistance and durable adhesion. Examples of ultraviolet absorbers include ZnO, TiO ₂ (which does not exhibit a photocatalytic function),
Inorganic semiconductors such as CeO ₂ ; and organic ultraviolet absorbers such as salicylic acid, benzophenone, benzotriazole, cyanoacrylate, and triazine. Examples of the ultraviolet stabilizer include piperidine.

Further, a leveling agent can be blended in order to further improve the coating property of the composition. Among such leveling agents, examples of a fluorine-based leveling agent (trade name; the same applies hereinafter) include BM1000 and BM11 manufactured by BM-CHEMIE.
00; Efka 772, Efka 77 of Efka Chemicals
7; Floren series manufactured by Kyoeisha Chemical Co., Ltd .; FC series manufactured by Sumitomo 3M Co., Ltd .; Fluonal TF series manufactured by Toho Chemical Co., Ltd., and the like. BYK series; Shmegma
nn) Sshmego series; Efka Chemicals Efka30, Efka31, Efka34, Efka3
5, Efka 36, Efka 39, Efka 83, Efka 8
6, Efka 88 and the like. Examples of the ether-based or ester-based leveling agent include Carfinol of Nissin Chemical Industry Co., Ltd .; Emulgen and Homogenol of Kao Corporation.

By adding such a leveling agent, the finished appearance of the coating film is improved, and the coating film can be uniformly applied. The amount of leveling agent used is
Preferably 0.01 to 5% by weight, based on the total composition,
More preferably, the content is 0.02 to 3% by weight.

As a method of blending the leveling agent, it may be blended at the time of preparing the composition, may be blended with the composition at the stage of forming the coating film, and may be further blended with the preparation of the composition. It may be blended at both stages of film formation.

The composition used in the present invention, preferably the undercoating compositions (i) to (iv), may be blended with another resin. Other resins include acrylic
Examples include urethane resin, epoxy resin, polyester, acrylic resin, fluorine resin, acrylic resin emulsion, epoxy resin emulsion, polyurethane emulsion, and polyester emulsion.

In the composition used in the present invention, the composition (II) in which the component (b1) is not specified
(B1) Water and / or an organic solvent can be separately added to (IV). In this case, the amount of the component (b1) is the same as that of the composition (I).

In preparing the composition of the present invention,
When the component (d) and the component (e) are not used, the method of mixing the components is not particularly limited, but the components (d) and (e)
When using the components, preferably (a) to (f)
After obtaining a mixture from which the component (e) has been removed, a method of adding the component (e) to the mixture is employed.

The total solid content of the coating composition of the present invention is generally 0.5 to 40% by weight, preferably 1 to 3% by weight.
0% by weight. If the total solid content of the composition exceeds 40% by weight, spray coating becomes difficult, which is not preferable.

The total solid content of the undercoating compositions (i) to (iv) which may be used in the present invention is usually
50% by weight or less, preferably 40% by weight or less;
It is appropriately adjusted according to the type of the base material, the coating method, the coating film thickness, and the like.

Aerosol can The aerosol can of the present invention contains any of the above-mentioned compositions (I) to (IV) and the spray coating composition of the present invention. Here, as the propellant used for the aerosol can, liquefied petroleum gas (LPG), dimethyl ether (DME), chlorofluorocarbons, nitrogen gas, carbon dioxide gas, and the like can be used. At this time, the amount of the propellant is
It varies depending on the volume, viscosity, specific gravity, and the like of the vaporized gas per unit weight of the propellant, the specific gravity, the viscosity of the composition, etc. Good to do. If it is less than 15% by weight, the composition may remain in the can after use, while if it exceeds 95% by weight, only the propellant remains in the can after use,
Almost only the propellant is injected, which is uneconomical. The compositions (i) to (iv) used for the undercoat
Can be filled in an aerosol can, and the application conditions in this case are the same as those of the coating composition of the present invention.

Cured product The composition of the cured product obtained from the composition of the present invention may be, for example, the following: base material / any one of compositions (I) to (IV) of the present invention. Any of iv) / any of compositions (I) to (IV) Substrate / primer / any of compositions (i) to (iv) / any of compositions (I) to (IV) No. When applying the coating composition of the present invention, spray coating is performed using the aerosol can of the present invention. The method of applying the undercoating compositions (i) to (iv) may be spray coating, and may be performed by using a brush, a roll coater, a flow coater, a centrifugal coater, an ultrasonic coater, or the like. Coating, flow coating, screen processing, electrodeposition, vapor deposition and the like may be used.

In the case of the coating composition of the present invention, a coating film having a dry film thickness of about 0.05 to 20 μm can be formed by a single coating, and the coating may be applied a plurality of times. Then, dry at room temperature, or 30 ~ 2
By heating and drying at a temperature of about 00 ° C. for about 1 to 60 minutes, a coating film can be formed.

When the undercoat is applied in advance,
Using the above compositions (i) to (iv), a dry film thickness of 1
The second coating can form a coating film having a thickness of about 0.05 to 20 μm and the second coating can have a thickness of about 0.1 to 40 μm. Then, dry at room temperature, or 30 ~ 20
By heating and drying at a temperature of about 0 ° C. for about 1 to 60 minutes, a coating film can be formed on various substrates. The total thickness of the undercoat and the overcoat is a dry film thickness, usually 0.1 to 80 μm, preferably 0.2 to 6 μm.
It is about 0 μm.

Further, when a primer is used depending on the use, the type of the primer is not particularly limited as long as it has an action of improving the adhesion between the substrate and the composition. Select according to the purpose of use. The primers can be used alone or in combination of two or more, and may be an enamel containing a coloring component such as a pigment or a clear containing no coloring component.

Examples of the type of the primer include alkyd resin, aminoalkyd resin, epoxy resin, polyester, acrylic resin, urethane resin, fluororesin, acrylic silicone resin, acrylic resin emulsion, epoxy resin emulsion, polyurethane emulsion, polyester emulsion and the like. Can be mentioned. In addition, these primers can be provided with various functional groups when adhesion between the substrate and the coating film under severe conditions is required. Examples of such a functional group include a hydroxyl group, a carboxyl group, a carbonyl group, an amide group, an amine group, a glycidyl group, an alkoxysilyl group, an ether bond, and an ester bond. further,
The primer may contain an ultraviolet absorber, an ultraviolet stabilizer, and the like.

Further, on the surface of a coating film formed from the coating composition of the present invention, for example, US Pat.
Forming a clear layer composed of a siloxane resin-based coating such as a stable dispersion of colloidal silica and a siloxane resin described in US Pat. No. 6,997, US Pat. Can also.

Substrates Substrates to which the coating composition of the present invention can be applied include, for example, metals such as iron, aluminum and stainless steel; tempered glass, partially tempered glass, laminated glass, polished glass and the like; cement, concrete , AL
C, flexible board, mortar, slate, plaster,
Inorganic ceramic materials such as ceramics and bricks; plastic molded products such as phenolic resin, epoxy resin, polyester, polycarbonate, polymethyl methacrylate (PMMA), polyethylene, polypropylene, ABS resin and AES resin; polyethylene, polypropylene,
Examples include plastic films such as polyvinyl alcohol, polycarbonate, polyethylene terephthalate (PET), polyurethane, and polyimide, wood, and paper. Further, the composition of the present invention is useful for repainting of a deteriorated coating film, repairing of wall materials, and the like.

These substrates may be subjected to a surface treatment in advance for the purpose of adjusting the base, improving the adhesion, filling the porous substrate, smoothing, and patterning. Examples of the surface treatment for the metal-based substrate include polishing, degreasing, plating, chromate treatment, flame treatment, coupling treatment, UV ozone treatment, and acid treatment.
As a surface treatment for the glass substrate, for example, degreasing,
Coupling treatment, UV ozone treatment, acid treatment and the like can be mentioned. Examples of the surface treatment for the plastic base material include blast treatment, chemical treatment, degreasing, flame treatment, oxidation treatment, steam treatment, corona discharge treatment, Ultraviolet irradiation treatment, plasma treatment, ion treatment and the like can be mentioned. Examples of the surface treatment for the inorganic ceramics-based substrate include polishing, filling, and patterning.
Examples of the surface treatment for the wood substrate include polishing, filling, and insect repellent treatment. Examples of the surface treatment for the paper substrate include filling and insect repellent treatment, and further deterioration. Examples of the surface treatment for the coating film include kerosene.

[0136]

EXAMPLES Hereinafter, embodiments of the present invention will be described more specifically with reference to examples. However, the present invention is not limited to these embodiments. Parts and% in Examples and Comparative Examples are based on weight unless otherwise specified. Various measurements and evaluations in Examples and Comparative Examples were performed by the following methods.

(1) Mw Mw was measured by gel permeation chromatography (GPC) under the following conditions. Sample: Prepared by dissolving 1 g of organosilane condensate or 0.1 g of silyl group-containing vinyl resin in 100 cc of tetrahydrofuran using tetrahydrofuran as a solvent. Standard polystyrene: Standard polystyrene manufactured by Pressure Chemical Co., USA was used. Apparatus: High-temperature, high-speed gel permeation chromatogram (model 150-C ALC / GPC) manufactured by Waters, Inc. Column: SHOdex A-80M manufactured by Showa Denko KK
(Length: 50 cm) Measurement temperature: 40 ° C. Flow rate: 1 cc / min (2) Adhesion Cross cut test according to JIS K5400
), The tape peel test was performed three times, and the average was used. (3) Hardness Based on pencil hardness according to JIS K5400. (4) Alkali Resistance After the test piece was immersed in a saturated calcium hydroxide aqueous solution for 60 days, the state of the coating film was visually observed. Those that did not change were regarded as “good”. (5) Organic Chemical Resistance 2 cc of isopropyl alcohol was dropped on the coating film, and after 5 minutes, wiped off with a cloth, and the state of the coating film was visually observed. Those that did not change were regarded as “good”. (6) Moisture resistance After the test piece was kept under an environment of a temperature of 50 ° C. and a humidity of 95% for 1,000 hours, the test piece was taken out and the state of the coating film was visually observed. Those that did not change were regarded as “good”. (7) Weather resistance According to JIS K5400, an irradiation test was performed for 3,000 hours with a sunshine weather meter, and the appearance (crack, peeling, etc.) of the coating film was visually observed. Those that did not change were regarded as “good”. (8) Water resistance After the test piece was immersed in tap water at normal temperature for 60 days, the state of the coating film was visually observed. Those that did not change were regarded as “good”. (9) Stain resistance Carbon black / kerosene = 1/2 (weight ratio) on the coating film
Was left at room temperature for 24 hours, washed with water using a sponge, the state of contamination of the coating film was observed, and evaluated according to the following criteria. ：: No contamination Δ: Slightly contaminated X: Severe contamination (10) Transparency The visible light transmittance of the test piece was measured and evaluated according to the following criteria. A: The transmittance exceeds 80%. ；: Transmittance is 60 to 80% △: transmittance is less than 60%

Reference Example 1 [Synthesis of component (b2)] In a reactor equipped with a reflux condenser and a stirrer, 70 parts of methyl methacrylate, 40 parts of n-butyl acrylate, 20 parts of γ-methacryloxypropyltrimethoxysilane, and acrylic 5 parts of acid, 2-hydroxyethyl methacrylate 13
Part, 1,1,1-trimethylamine methacrylimide 1
Part, 4- (meth) acryloyloxy-2,2,6,6
-1 part of tetramethylpiperidine, 150 parts of i-propyl alcohol, 50 parts of methyl ethyl ketone and 25 parts of methanol are added and mixed, and the mixture is heated to 80 ° C. while stirring, and 4 parts of azobisisovaleronitrile is mixed with xylene. After dropping the solution dissolved in 10 parts over 30 minutes, the mixture was reacted at 80 ° C. for 5 hours to obtain a solid concentration of 40%.
%, A polymer solution having an Mw of 11,000 (hereinafter referred to as “(b2-
A) ").

Reference Example 2 [Synthesis of Component (b2)] In a reactor equipped with a reflux condenser and a stirrer, 70 parts of methyl methacrylate, 40 parts of n-butyl acrylate, 20 parts of γ-methacryloxypropyltrimethoxysilane, glycidyl 18 parts of methacrylate, 1 part of 1,1,1-trimethylamine methacrylimide, 4- (meth) acryloyloxy-2,2,6,6-tetramethylpiperidine 1
And 150 parts of i-propyl alcohol, 50 parts of methyl ethyl ketone and 25 parts of methanol were added and mixed, and the mixture was heated to 80 ° C. with stirring, and 4 parts of azobisisovaleronitrile was dissolved in 10 parts of xylene. After the solution was added dropwise over 30 minutes, the mixture was reacted at 80 ° C. for 5 hours to obtain a polymer solution having a solid concentration of 40% and Mw of 13,000 (hereinafter referred to as “(b2-B)”).

Reference Example 3 [Synthesis of Component (b2)] In a reactor equipped with a reflux condenser and a stirrer, 70 parts of methyl methacrylate, 30 parts of n-butyl acrylate, 20 parts of γ-methacryloxypropyltrimethoxysilane, 18 parts of acrylate, 10 parts of acrylamide,
1 part of 1,1,1-trimethylamine methacrylimide,
4- (meth) acryloyloxy-2,2,6,6-tetramethylpiperidine 1 part, i-propyl alcohol 1
50 parts, methyl ethyl ketone 50 parts and methanol 2
After adding and mixing 5 parts, the mixture was heated to 80 ° C. while stirring, and a solution prepared by dissolving 4 parts of azobisisovaleronitrile in 10 parts of xylene was added dropwise to the mixture over 30 minutes. Reaction for 40 hours, solid content concentration 40%, M
w is a polymer solution of 10,000 (hereinafter "(b2-C)"
).

Reference Example 4 [Synthesis of Component (b3)] After a stainless steel autoclave equipped with an electromagnetic stirrer was sufficiently substituted with nitrogen gas, 150 parts of methyl isobutyl ketone, 30 parts of ethyl vinyl ether, and peroxide in the autoclave were added. 2 parts of lauroyl (radical polymerization initiator) was charged, and the solution in the autoclave was dried with dry ice.
After cooling to −50 ° C. with methanol, oxygen in the system was removed again with nitrogen gas. Next, 20 parts of hexafluoropropylene, 45 parts of perfluoro (methyl vinyl ether) and 5 parts of vinyltrimethoxysilane were added, and the temperature was raised. The temperature inside the autoclave is 60 ° C
The pressure in the autoclave at the time of reaching 5 kg
f / cm ² . The polymerization reaction was continued for 20 hours by stirring while maintaining the temperature of the reaction system at 60 ° C. When the pressure in the autoclave dropped to 1.5 kgf · cm ² , the reaction was stopped by water cooling to stop the solid content. Concentration 4
0%, Mw 30,000 polymer solution (hereinafter referred to as “(b3
-A) ").

Reference Examples 5 to 7 [Synthesis of Component (b3)] A polymer solution having a solid content of 40% (b3-) was prepared in the same manner as in Reference Example 4 except that the monomer components shown in Table 1 were used. B) ~
(B3-D) was obtained.

[0143]

[Table 1]

Reference Example 8 [Preparation of Primer] To 100 parts by weight of the polymer solution (b2-A) obtained in Reference Example 1, 80 parts by weight of methyl ethyl ketone and 20 parts by weight of i-propyl alcohol were added and stirred well. Then, 20 parts by weight of zinc oxide (toluene dispersion solid content concentration 30%) adjusted to a solid content concentration of 20% with methyl ethyl ketone was dropped and stirred, and a primer solution having a solid content concentration of 20% (hereinafter referred to as "( p-1))).

Preparation Examples 1-27 [Preparation of Coating Composition for Spray] Into a reactor equipped with a stirrer and a reflux condenser, each component (other than acetylacetone) described in Tables 2 to 7 was added and mixed.
The reaction was carried out at 60 ° C. for 4 hours with stirring. Next, the mixture was cooled to room temperature, and 10 parts of acetylacetone was added thereto to obtain a composition having a solid content of about 20%. To 100 parts of the obtained composition, 100 parts of i-propyl alcohol was added and mixed well, and the spray coating composition (I-1) of the present invention was used.
To (I-9), (II-1) to (II-9) and (III-
1) to (III-9) were obtained.

[0146]

[Table 2]

[0147]

[Table 3]

[0148]

[Table 4]

[0149]

[Table 5]

[0150]

[Table 6]

[0151]

[Table 7]

In Tables 2 to 7, * 1 to 7 are as follows. * 1: Shin-Etsu Chemical Co., Ltd., methyl silicone resin, Mw: 500 * 2: Nippon Unicar Co., Ltd., ethoxysilane-containing polydimethylsiloxane, Mw: 5,000 * 3: Water-dispersed (pH 4) anatase type Titanium oxide (solid content 20%) * 4: i-propyl alcohol dispersed anatase type titanium oxide (solid content 20%) * 5: Water dispersed (pH 4) anatase type titanium oxide (solid content 30%) * 6: Toluene dispersed zinc oxide (solid content 30%) * 7: Methyl ethyl ketone dispersed silica sol (solid content 30%)

Preparation Example 28 [Preparation of Coating Composition for Spray] In a reactor equipped with a stirrer and a reflux condenser, as a component (c), titanium oxide sol (anatase type TiO ₂ 20% (solid content), nitric acid aqueous solution 80) %], 70 parts of methyltrimethoxysilane and 30 parts of dimethyldimethoxysilane.
And 50 parts of the polymer solution (b2-A) obtained in Reference Example 1 and 180 parts of i-propyl alcohol were stirred while being dropped, and 5 parts of di-i-propoxyethyl acetoacetate aluminum was added. The reaction was performed at 60 ° C. for 4 hours. Next, 5 parts of acetylacetone was added to obtain a specific polymer solution having a total solid content of 20% (hereinafter, also referred to as “polymer solution (α)”). This polymer solution (α) 10
To 0 parts, an alkyl sulfate salt as an emulsifier and 10% aqueous ammonia were added at a temperature of 30 ° C. or lower, and mixed well to adjust the pH to 7.5. Next, the mixture was diluted with 50 parts of i-propyl alcohol, and the resulting solution was deionized with 25 parts of ion-exchanged water.
The emulsion was gradually added to 0 parts over 2 hours to form an emulsion. To the emulsion is added 2 parts of adipic dihydrazide, and then the i-propyl alcohol and water are removed from the emulsion under reduced pressure at a temperature of 50 ° C or less,
The total solid content concentration was adjusted to 20% to obtain a spray coating composition (IV-1) of the present invention.

Preparation Examples 29 to 32 [Preparation of Coating Composition for Spray] According to the formulation shown in Table 8, a specific polymer was prepared in the same manner as in Preparation Example 28, and thereafter, in the same manner as in Preparation Example 28, Spray coating compositions (IV-2) to (IV) of the present invention
-5) was obtained.

[0155]

[Table 8]

Preparation Example 33 [Preparation of coating composition for spraying] A polymer solution was obtained in the same manner as in Preparation Example 1 except that the component (c) was not used, and 100 parts of the obtained polymer solution was obtained. , An alkyl sulfate salt as an emulsifier and 10% aqueous ammonia were added at a temperature of 30 ° C or lower, and mixed well to adjust the pH to 7.5. Then, the mixture was diluted with 100 parts of i-propyl alcohol, and the obtained solution was gradually added to 200 parts of ion-exchanged water over 2 hours to form an emulsion. To this emulsion was added 4 parts of adipic dihydrazide, and the emulsion was then concentrated under reduced pressure for 50 hours.
I-Propyl alcohol and water were removed at a temperature of not more than ℃ to adjust the total solid concentration to 20%. In 100 parts of this emulsion, a titanium oxide sol adjusted to pH 7 [anatase type titanium oxide 20% (solid content), water 80
%] Was dropped, and the mixture was thoroughly stirred, and the total solid concentration was 2
0% of the spray coating composition of the present invention (IV-
6) was obtained.

Preparation Examples 34 to 38 [Synthesis of Undercoating Coating Composition] Into a reactor equipped with a reflux condenser and a stirrer, the components of the kind and number of parts shown in Table 9 (excluding water and post-addition components) were added. After adding and stirring well, 30 parts of water was added dropwise with stirring, and
Allowed to react for hours. Subsequently, the post-addition component was added and cooled to room temperature to obtain a composition having a solid content of 30%. To 100 parts of the obtained composition, 100 parts of i-butyl alcohol, propylene glycol monomethyl ether acetate 10
0 parts were added and mixed well to obtain undercoating coating compositions (i-1) to (i-2), (ii-1) to (ii-2) and (iii-1).

[0158]

[Table 9]

* 8: i-propyl alcohol-dispersed zinc oxide (solid content: 30%) Preparation Example 39 [Synthesis of Undercoating Coating Composition] 70 parts of methyltrimethoxysilane was added to a reactor equipped with a stirrer and a reflux condenser. , 30 parts of dimethyldimethoxysilane,
A solution prepared by dissolving 50 parts of the polymer solution (b2-A) obtained in Reference Example 1 and 5 parts of di-i-propoxyethyl acetoacetate aluminum in 180 parts of an i-propyl alcohol solution was mixed. Part,
The reaction was performed at 60 ° C. for 4 hours. Then, the reaction product was cooled to room temperature, 5 parts of acetylacetone and 130 parts of i-propyl alcohol were added, and the total solid concentration was 2 parts.
A 0% polymer solution was obtained. In 100 parts of this polymer solution,
At a temperature of 30 ° C. or lower, an alkyl sulfate ester salt as an emulsifier and 10% aqueous ammonia are added, and mixed well to obtain a pH value.
Adjusted to 7.5. Then, i-propyl alcohol 5
The resulting solution was gradually added to 250 parts of ion-exchanged water over 2 hours to form an emulsion. To this emulsion, add 2 parts of adipic dihydrazide,
Next, i-propyl alcohol and water were removed from this emulsion under reduced pressure at a temperature of 50 ° C. or less, and the total solid content concentration was adjusted to 20% to obtain an undercoating coating composition (iv-1).

Examples 1 to 38 240 ml of each coating composition or each of the coating compositions for undercoating obtained in the Preparation Examples and 240 ml of a filling gas (dimethyl ether) were filled in a can to produce an aerosol can. If necessary, apply the following Table 1 to the surface of the AES resin substrate.
The undercoating coating composition described in Nos. 0 to 14 is spray-coated and dried using the aerosol can so that the dry film thickness is 1 μm, and then the coating composition of the present invention has a dry film thickness of 0.2 μm. As described above, a sample was obtained by spray coating and drying using the aerosol can. Various evaluations were performed on the obtained samples. Table 1 shows the results
It is shown together with 0-14.

[0161]

[Table 10]

[0162]

[Table 11]

[0163]

[Table 12]

[0164]

[Table 13]

[0165]

[Table 14]

Examples 39 to 51 The base coating compositions shown in Table 15 were spray-coated and dried on the respective substrates shown in Table 15 using the aerosol can so that the dry film thickness became 1 μm. Next, the coating composition of the present invention described in Table 15 was spray-coated using the aerosol can so as to have a dry film thickness of 0.2 μm, and dried to obtain a sample. The obtained sample was evaluated for adhesion and weather resistance. When there are a plurality of undercoat layers, the total dry film thickness is 1 μm.
And applied in such a manner that The results are shown in Table 15.

[0167]

[Table 15]

[0168]

Industrial Applicability The spray coating composition of the present invention contains a specific organosilane component and a photocatalytic component, has antifouling properties, and does not impair the aesthetic appearance for a long period of time to obtain a maintenance-free coating film. Can be In addition, the aerosol can of the present invention can easily form a coating film having excellent antifouling properties at home or by a company such as a house cleaner.
Prevents the growth of germs and mold on the ceiling, prevents slime on kitchen and bath products, disassembles toilet odors, dissolves tobacco odor from office and home rooms, oil stains scattered on kitchen walls, range hoods, and kitchen panels In addition to disassembly of oil, dirt of oil from the ventilation fan, decomposition of stains on tablecloths, prevention of dirt on toilet bowls and tiles, etc., various types of housing equipment such as interior and exterior walls of buildings, furniture, electric lights, car bodies, car windows It can be suitably used for sanitizing living spaces, such as formation of antibacterial coatings on vehicles, office equipment, toys and the like. It can also be suitably used for painting and repairing various molded products.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C09D 127/12 C09D 129/10 129/10 143/04 143/04 B65D 83/00 A (72) Inventor Toshiki Sakagami 2-11-24 Tsukiji, Chuo-ku, Tokyo FSR in JSR Corporation 4D075 AA02 EA06 EB42 EC02 4J038 CD121 CD122 CE051 CE052 CL001 CL002 DB411 DB412 DD241 DD242 DL021 DL022 DL051 DL052 DL071 DL072 GA15 HA216 MA08 MA10 NA05 PA06 PA17

Claims (6)

[Claims] (I) (a) The following general formula (1) (R ¹ ) _n Si (OR ² ) _4-n (1) (wherein, R ¹ exists two times) Sometimes the same or different, and represents a monovalent organic group having 1 to 8 carbon atoms; R ² is the same or different and represents an alkyl group having 1 to 5 carbon atoms or an acyl group having 1 to 6 carbon atoms; It is an integer of 0 to 2.)
(B1) water and / or an organic solvent, and (c) a photocatalyst, which comprises at least one selected from the group consisting of an organosilane represented by the following formula, a hydrolyzate of the organosilane, and a condensate of the organosilane. A spray coating composition comprising: (II) The component (a) according to claim 1, (b2) a polymer containing a silyl group having a silicon atom bonded to a hydrolyzable group and / or a hydroxyl group, and (c) a photocatalyst. A spray coating composition characterized by containing: (III) The component (a) according to claim 1, (b3) a structural unit represented by the following general formula (2)(Where R^Three~ R^FiveIs C_mY_{2m + 1}, M = an integer from 0 to 5,
Y is independently selected from F, H and Cl
You. ) And / or a structure represented by the following general formula (3)
UnitWherein Rf is an alkyl group containing a fluorine atom or
A oxyalkyl group;^Three~ R^FiveIs the general formula (2)
It is synonymous and, within the same meaning, R of the general formula (2) ^Three~ R
^FiveAnd may be different. ] And hydrolyzable
Having a silicon atom bonded to a group and / or a hydroxyl group
At least one selected from the group of polymers containing a silyl group
A seed, and (c) a spray core comprising a photocatalyst.
Coating composition. 4. A polymer containing (IV) a component according to claim 1, and (b2) a polymer containing a silyl group having a silicon atom bonded to a hydrolyzable group and / or a hydroxyl group. A coating composition for spraying, comprising: an aqueous dispersion in which the photocatalyst is dispersed in an aqueous medium. 5. An aerosol can filled with the spray coating composition according to claim 1. Description: 6. On a substrate, the following (i), (ii), (iii)
Or forming a coating film comprising the composition of (iv),
And forming a coating film using the aerosol can according to claim 5.
A method for forming a coating film, comprising: (I) (a) The following general formula (1) (R¹)_nSi (OR^Two)_4-n ... (1) (where R¹Are the same or different when there are two
Represents a monovalent organic group having 1 to 8 carbon atoms;^TwoAre the same
Or different, an alkyl group having 1 to 5 carbon atoms or carbon number
Represents an acyl group of 1 to 6, and n is an integer of 0 to 2. )
An organosilane represented by the formula:
Selected from the group of decomposed products and condensates of the organosilane
At least one, and (b1) water and / or
A coating composition containing an organic solvent. (Ii) component (a), and (b2) a hydrolyzable group
And / or silicon compounds having a silicon atom bonded to a hydroxyl group.
Coating composition containing a polymer containing a ril group
object. (Iii) The component (a) and (b3) the following general formula
Structural unit represented by (2)(Where R^Three~ R^FiveIs C_mY_{2m + 1}, M = an integer from 0 to 5,
Y is independently selected from F, H and Cl
You. ) And / or a structure represented by the following general formula (3)
UnitWherein Rf is an alkyl group containing a fluorine atom or
A oxyalkyl group;^Three~ R^FiveIs the general formula (2)
It is synonymous and, within the same meaning, R of the general formula (2) ^Three~ R
^FiveAnd may be different. ] And hydrolyzable
Having a silicon atom bonded to a group and / or a hydroxyl group
At least one selected from the group of polymers containing a silyl group
A coating composition containing (Iv) A polymer containing the above component (a) and the above component (b2) is contained in an aqueous medium.
Composition containing an aqueous dispersion dispersed in water
object.