CN108219652A - A kind of aqueous double-component finishing coat and preparation method thereof - Google Patents
A kind of aqueous double-component finishing coat and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/06—Polyurethanes from polyesters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
- C08G18/4081—Mixtures of compounds of group C08G18/64 with other macromolecular compounds
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/64—Macromolecular compounds not provided for by groups C08G18/42 - C08G18/63
- C08G18/6407—Reaction products of epoxy resins with at least equivalent amounts of compounds containing active hydrogen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/68—Unsaturated polyesters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
- C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
- C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G81/00—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
- C08G81/02—Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers at least one of the polymers being obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C08G81/024—Block or graft polymers containing sequences of polymers of C08C or C08F and of polymers of C08G
- C08G81/027—Block or graft polymers containing sequences of polymers of C08C or C08F and of polymers of C08G containing polyester or polycarbonate sequences
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The invention discloses a kind of aqueous double-component finishing coats and preparation method thereof.The aqueous double-component finishing coat is by two component of A, B with (2.5~3.5)：1 mass ratio is mixed to get, and wherein component A includes the following component according to parts by weight：25~40 parts of water-based acrylic resin, 25~40 parts of aqueous polyester resin, 10~30 parts of mill base, 0.1~1 part of substrate wetting agents, 0.1~1 part of levelling agent, 0.1~1 part of antifoaming agent, 0.1~1 part of ultra-violet absorber, 0.1~1 part of fungicide, 5~10 parts of cosolvent, 0.1~1 part of thickener, 2~5 parts of carboxymethyl chitosan；B component includes the following component according to parts by weight：40~60 parts of isocyanate curing agent, 0.1~1 part of adhesion promoter, 40~60 parts of cosolvent.Plumpness, gloss, levelability, application property and the terms of mechanics performance of the finishing coat can reach the standard of high-performance oiliness finishing coat, higher than existing standard aqueous finishing coat, and have the advantages that low VOCs.
Description
Technical field
The invention belongs to coating preparation field, in particular to a kind of automobile-used aqueous double-component finishing coat.
Background technology
Coating is once called as painting, and refers to that object surface can be coated on, is firmly combined with volume, is formed and consolidated with some strength
The substance of state film, body of a motor car coating are multilayer systems, generally include electrophoretic deposition prime coat, floating coating layer, top coat layer etc.,
Wherein finishing coat is as last layer of coating, it is necessary to have several functions：1. good appearance：Including plumpness is high, gloss is high, stream
Levelling is good, without shrinkage cavity, without prickly heat etc.；2. excellent protective value：Including hardness is good, flexibility is good, good weatherability, water resistance
It is good, salt fog resistance is good etc.；3. excellent application property：It is good including wetability, it is not easy to sagging；4. broad construction window：Including
There is good adaptability etc. to temperature and humidity.
For the car paint in China still based on solvent type, a large amount of volatile organic compounds (VOCs) are right in coating process
Ecological environment causes serious pollution, while great harm is also brought to human health.With people's environmental consciousness
It improves, national governments have all put into effect a large amount of relevant regulations to limit the discharge capacity of VOCs.For the development in the epoch of complying with, automobile
The positive environmentally friendly direction transformation of coating, wherein Environmentally friendly coatings include water paint, powdery paints, UV curing paintings
Material and high solid coating, and water paint is shown one's talent with its excellent comprehensive performance, is one kind with fastest developing speed.
Patent CN105482588A《A kind of environment-friendly type nano metal automobile finishing coat》A kind of automobile finish is disclosed, the patent
Coordinated by adding in treated nano metal powder with other materials, finally obtain the finishing coat of function admirable；Patent
CN106800874A《A kind of aqueous two-component polyurethane finishing coat and preparation method thereof》Disclose mainly by hydroxy acrylate and
Isocyanate curing agent, but simultaneously containing the two kinds of polyisocyanates curings of hydrophily and hydrophobicity in curing agent in the patent
Agent, and water-based hydroxyl acrylic acid dispersion content is high in component A, the resistance to acid and alkali of product is uneven.
Inventor has found simultaneously, and traditional water-based acrylic resin coating is higher, hot sticky cold with easy dehydration, light absorptive
The defects of crisp, environmentally sensitive, and at present aqueous double-component finishing coat for oiliness two-component finishing coat, paint film it is full
Also there are gaps for degree, gloss, levelability, application property etc..Therefore, exploitation is a kind of has good plumpness, gloss, levelling
The aqueous double-component finishing coat of property and application property, and this kind of finishing coat performance can reach the trend that oiliness finishing coat is kind of certainty.
Invention content
In view of insufficient existing for existing water-based acrylic resin coating, the purpose of the present invention is to provide a kind of aqueous double groups
Part finishing coat, the aqueous double-component finishing coat performance is not only suitable with oiliness finishing coat, and there is no the defects of oiliness finishing coat.
In order to realize the above-mentioned purpose of the present invention, by a large number of experiments research and unremitting effort, it is finally obtained following skill
Art scheme：A kind of aqueous double-component finishing coat, by two component of A, B with (2.5~3.5)：1 mass ratio is mixed to get, wherein component A
Include the following component according to parts by weight：
B component includes the following component according to parts by weight：
40~60 parts of isocyanate curing agent
0.1~1 part of adhesion promoter
40~60 parts of cosolvent；
The water-based acrylic resin is prepared via a method which：By methyl methacrylate, hydroxy-ethyl acrylate, propylene
Acid in mass ratio 20：25：5 ratio mixing adds 1~2% initiator dibenzoyl peroxide, is uniformly mixed, obtains
Mixed liquor；The epoxy resin of 4~6 parts by weight, middle ring are added in the hexamethylene and the in the mixed solvent of water that parts by weight are 37 parts
The mass ratio of hexane and water is 1：(2~4) flow back at 100~120 DEG C, at the same by mixed liquor be added dropwise to hexamethylene with
The in the mixed solvent of water, 1.6~2h are dripped, and continue to keep the temperature, and react more than 3h, stop heating, are cooled to 80 DEG C hereinafter, carrying out
Vacuum distillation, the distilled water for adding 3~5 parts by weight are diluted, and it is 7~7.5 finally to adjust pH with triethylamine, stirring
30min obtains water-based acrylic resin.
Aqueous polyester resin is hydroxyl terminated unsaturated polyester in the present invention, and unsaturated acid anhydride is heated in nitrogen atmosphere and is satisfied
It is obtained with acid anhydrides, is existing conventional techniques means.
It is further preferred that aqueous double-component finishing coat of the present invention, by two component of A, B with 3：1 mass ratio mixes
It arrives, specific each content of material is as follows in each component：
Wherein component A includes the following component according to parts by weight：
B component includes the following component according to parts by weight：
48~53 parts of isocyanate curing agent
0.5~0.8 part of adhesion promoter
48~55 parts of cosolvent.
It is further preferred that aqueous double-component finishing coat of the present invention, specific each content of material is as follows in each component：
Wherein component A includes the following component according to parts by weight：
B component includes the following component according to parts by weight：
50 parts of isocyanate curing agent
0.6 part of adhesion promoter
52 parts of cosolvent.
The present invention carries out polymerisation in water-based acrylic resin building-up process using the monomer with different hydrophilic group,
Improve the film forming of resin first, while there is preferable film forming using carboxymethyl chitosan, film is glossy, it is transparent and
The characteristics of flexible, further improves the filming performance of finishing coat entirety, while carboxymethyl chitosan has stronger water imbibition, because
This is with good performance of keeping humidity, and the hot sticky defect for effectively improving acrylic resin is cold short so that finishing coat viscosity substantially constant.
It is further preferred that aqueous double-component finishing coat of the present invention, base material wetting agent therein is polyether-modified silicon
Oxygen alkane.
It is further preferred that aqueous double-component finishing coat of the present invention, thickener therein is polyurethane.
It is further preferred that aqueous double-component finishing coat of the present invention, levelling agent therein for carboxymethyl cellulose or
Polyacrylic acid.
It is further preferred that aqueous double-component finishing coat of the present invention, cosolvent therein is hydrophobic cosolvent, hydrophobic
Cosolvent includes propylene glycol methyl ether acetate, dipropylene glycol methyl ether acetate, propylene glycol diacetate, dipropylene, just
Amylalcohol and n-octyl alcohol.
It is further preferred that aqueous double-component finishing coat of the present invention, isocyanate curing agent is two in the B component
Methylenebis phenyl isocyanate curing agent.
The present invention also provides the preparation methods of above-mentioned aqueous double-component finishing coat, specifically include following preparation process：
(1) water-based acrylic resin and aqueous polyester resin are uniformly mixed, be slowly added to carboxymethyl chitosan, mill base,
Substrate wetting agents, levelling agent, antifoaming agent, ultra-violet absorber, fungicide and cosolvent add in thickener and adjust viscosity, filtering
Component A is obtained after discharging；
(2) isocyanate curing agent, adhesion promoter and cosolvent are mixed, filtering and discharging obtains component B；
(3) component A and B component are mixed in proportion, obtains aqueous double-component finishing coat.
It is further preferred that the preparation method of aqueous double-component finishing coat of the present invention, filtering is using 120-200 purposes
Strainer.
The present invention has the following technical effect that relative to the prior art：
The aqueous double-component finishing coat of the present invention is combined, and assist existing conven-tional adjuvants of arranging in pairs or groups by specific substance, is made
Standby obtained finishing coat, plumpness, gloss, levelability, application property and terms of mechanics performance can reach the performance of oiliness finishing coat,
Higher than existing disclosed aqueous finish paint, and there is low VOCs.
Specific embodiment
The specific embodiment of the present invention is described further, but protection scope of the present invention is not limited only to down below
The embodiment stated.
Acrylic resin refers to acrylic acid, acrylic ester monomer is aggregated, is copolymerized, one kind obtained by grafting or blending
Polymer, water-based acrylic resin refer to by be originally be grafted on water-insoluble acrylic resin a certain amount of hydrophilic radical or
By alcoholysis, into water-soluble resin made of the modes such as salt.With being increasingly enhanced for mankind's environmental consciousness, due to water soluble acrylic acid
Resin has many advantages, such as excellent anti-corrosive properties, weatherability, water-fast, alkaline-resisting, good film-forming property, environmentally safe, safe to use, adopts
Main way of the solvent based coating as modern coatings industrial development, common water soluble acrylic acid are replaced with water-based acrylic resin
Resin includes aqueous solution type and water-dispersion type, but all comes with some shortcomings, such as aqueous solution type acrylic resin has film forming
Water-resistant type is poor afterwards, and cannot often form continuous resin film；Water-dispersion type then exists is unable to shape below minimum film formation temperature
Into continuous film so that for the high polymer of glass transition temperature, it is difficult to be formed at room temperature, after water volatilization, resin viscosity
Rapid to rise, film is also easy to produce bubble and pin hole, the coating that the water very big by the use of surface tension to prepare as dispersant, to base
The wetability of material is poor, particularly easily forms rough film when metal surface or frosting are constructed.Consider,
Mainly there are the defects of hot sticky cold crisp for water-based acrylic resin.
An important content for preparing water-based acrylic resin is that oil-soluble polymer how to be enable to be dissolved in water, aqueous
Modificationization method mainly has salt forming method, alcoholysis method, introduces nonionic hydrophilic moieties method, and can improve it by the above method lacks
Fall into, and it is the most frequently used and it is effective be then the nonionic hydrophilic moieties method that introduces, but inventor is on the basis of existing technology,
Different types of nonionic hydrophilic moieties are introduced in water-based acrylic resin polymerization process, the application property of the finishing coat found
It although makes moderate progress with mechanical property, but the performance of oil paint is still not achieved, therefore inventor is to water soluble acrylic acid tree
Under the premise of fat is modified, investigate not by chemical synthesis mode, but physics introduces other high molecular polymers and coordinates with it
It uses, whether see makes finishing coat effect increase significantly, as a result, it has been found that after specific high molecular polymer is added in, hot sticky cold crisp
That is application property range is significantly expanded, and is also improved in terms of mechanical property.
Water-based acrylic resin is prepared via a method which in following embodiments：By 20 parts by weight of methyl methacrylate,
25 parts by weight of hydroxy-ethyl acrylate, the mixing of the ratio of 5 parts by weight of acrylic acid add the initiator diphenyl peroxide of 1 parts by weight
Formyl is uniformly mixed, obtains mixed liquor, and 4.5 parts by weight are added in the hexamethylene of 37.5 parts by weight and the in the mixed solvent of water
The mass ratio of epoxy resin, hexamethylene He Shui and water is 1：3, it flows back at 110 DEG C, while mixed liquor is added dropwise to hexamethylene
The in the mixed solvent of alkane and water, 2h are dripped, and continue to keep the temperature, and react 3h, are stopped heating, are cooled to 70 DEG C, are evaporated under reduced pressure,
Recycling part solvent and unreacted monomer are removed, adds in the distilled water dilution of 4 parts by weight, it is 7 that triethylamine, which adjusts pH, stirring
30min obtains water-based acrylic resin.
Thickener is polyurethane in the embodiment of the present invention, and levelling agent is carboxymethyl cellulose, isocyanate curing agent two
Methylenebis phenyl isocyanate curing agent, cosolvent are n-amyl alcohol, and adhesion promoter includes silanes adhesion promoter, attachment
Make every effort to promote into resin, adhesion promoter uses silane coupling agent in following embodiments, and above-mentioned each auxiliary agent is that this field prepares face
Substance is often used during paint.
Embodiment 1
The preparation of aqueous double-component finishing coat
The formula of aqueous double-component finishing coat is as shown in table 1, and preparation process is as follows：
(1) it puts into the water-based acrylic resin of formula ratio successively into container and aqueous polyester resin and is uniformly mixed, it
After be slowly added to mill base, substrate wetting agents, levelling agent, antifoaming agent, ultra-violet absorber, fungicide and cosolvent, add increasing
Thick dose, component A is obtained after stirring evenly rear filtering and discharging；
(2) the mixing isocyanate curing agent, adhesion promoter and cosolvent of formula ratio, filtering are added in into container
Discharging obtains component B；
(3) it is 3 according to the mixed proportion of A and B：1 is mixed, and obtains aqueous double-component finishing coat.
The aqueous double-component finishing coat of 1 different formulations of table
The aqueous double-component finishing coat performance detection data of 2 different formulations of table
Meanwhile inventor has detected the performance of commercially available oiliness finishing coat and aqueous finish paint, wherein commercially available oiliness finishing coat model
SW-100D pure white (Ya Tu new high-tech materials Co., Ltd), commercially available aqueous finish paint model Chinese mugwort bodyguard obtain aqueous double groups of IMRON7200
Part polyurethane finish, the results are shown in Table 3 for detection performance.
3 commercially available oiliness finishing coat of table and aqueous finish paint performance
By table 1, table 2 and table 3 it is found that inventive formulation comprehensive performance is suitable with conventional oil-based finishing coat, considerably beyond tradition
Water-based acrylic resin, comprehensive and above-mentioned performance, the finishing coat performance that formula 5 obtains are best.
Embodiment 2
Table 4 is in the case that embodiment 2 ensures that each substance classes are constant in formula, to change feeding intake for each content of material and match
Side, aqueous double-component finishing coat is prepared according to the technical process of embodiment 1.
By formula 6~9 prepare obtain aqueous double-component finishing coat performances it is as shown in table 5, with 2 performance comparison of table it is found that
When each substance classes parts by weight of A, B component exceed 1 table scope of disclosure of embodiment, what is obtained obtains aqueous double-component finishing coat
Various aspects of performance drastically reduces.
The aqueous double-component finishing coat of 4 different formulations of table
The aqueous double-component finishing coat performance detection data of 5 different formulations of table
Comparative example 1
Under the premise of 1 preparation process of embodiment and its parameter constant, on the basis of 5 composition of formula and its each content of material,
It has investigated and water-based acrylic resin Hydroxylated acrylic resin, the organosilicon modified crylic acid resin in component A is replaced, and examined
Its performance is surveyed, the wherein specific preparation process of organosilicon-modified acrylic is：Take methyl methacrylate 30ml, butyl acrylate
15ml, 3ml glycidyl methacrylate, 6ml methacrylic acids, 6ml vinyl silicone oils are uniformly mixed, and are added in mixed liquor
Enter 100ml deionized waters, 2h, 200W ultrasonic echography 15min are stirred with 900r/min, add in 2g initiators 2,2 ,-azo two
Isobutyl amidine dihydrochloride under nitrogen atmosphere, is heated to 75 DEG C, keeps the temperature 1h, continues to be heated to 85 DEG C of heat preservation 3h, is cooled to room
Temperature, discharging, obtains organosilicon-modified acrylic emulsion.
6 different formulations finishing coat performance of table
Comparative example 2
Since carboxymethyl chitosan is the common substances such as medicine, field of textiles in inventive formulation, in the art not
It is common, therefore inventor has been investigated based on the formula of embodiment 15, after not adding carboxymethyl chitosan, the property of obtained substance
Can, the results are shown in Table 7.
Table 7 is not added with the finishing coat performance that carboxymethyl chitosan obtains
Claims (10)
1. a kind of aqueous double-component finishing coat, it is characterised in that by two component of A, B with (2.5~3.5)：1 mass ratio is mixed to get,
Wherein component A includes the following component according to parts by weight：
B component includes the following component according to parts by weight：
40~60 parts of isocyanate curing agent
0.1~1 part of adhesion promoter
40~60 parts of cosolvent；
The water-based acrylic resin is prepared via a method which：Methyl methacrylate, hydroxy-ethyl acrylate, acrylic acid are pressed
Mass ratio 20：25：5 ratio mixing adds 1~2% initiator dibenzoyl peroxide, is uniformly mixed, is mixed
Liquid；The epoxy resin of 4~6 parts by weight, cyclohexane are added in the hexamethylene and the in the mixed solvent of water that parts by weight are 37 parts
Mass ratio with water is 1：(2~3) flow back at 100~120 DEG C, while mixed liquor is added dropwise to hexamethylene and water
In the mixed solvent, 1.6~2h are dripped, and continue to keep the temperature, and react more than 3h, are stopped heating, are cooled to 80 DEG C hereinafter, being depressurized
Distillation, it is 7~7.5 to adjust pH with triethylamine, obtains water-based acrylic resin.
2. aqueous double-component finishing coat according to claim 1, it is characterised in that by two component of A, B with 3：1 mass ratio mixing
It obtains, it is as follows that each substance accounts for respective components by weight：
Wherein component A includes the following component according to parts by weight：
B component includes the following component according to parts by weight：
48~53 parts of isocyanate curing agent
0.5~0.8 part of adhesion promoter
48~55 parts of cosolvent.
3. aqueous double-component finishing coat according to claim 2, it is characterised in that：
Wherein component A includes the following component according to parts by weight：
B component includes the following component according to parts by weight：
50 parts of isocyanate curing agent
0.6 part of adhesion promoter
52 parts of cosolvent.
4. aqueous double-component finishing coat according to claim 1, it is characterised in that：The base material wetting agent is polyether-modified silica
Alkane.
5. aqueous double-component finishing coat according to claim 1, it is characterised in that：The thickener is polyurethane.
6. aqueous double-component finishing coat according to claim 1, it is characterised in that：The levelling agent is carboxymethyl cellulose or gathers
Acrylic acid.
7. aqueous double-component finishing coat according to claim 1, it is characterised in that：The cosolvent is hydrophobic cosolvent, described
Hydrophobic cosolvent includes propylene glycol methyl ether acetate, dipropylene glycol methyl ether acetate, propylene glycol diacetate, dipropylene glycol fourth
Ether, n-amyl alcohol and n-octyl alcohol.
8. aqueous double-component finishing coat according to claim 1, it is characterised in that：Isocyanate curing agent is in the B component
Methyl diphenylene diisocyanate curing agent.
9. a kind of preparation method of aqueous double-component finishing coat for preparing any one of claim 1-8, it is characterised in that specifically include
Following preparation process：
(1) water-based acrylic resin and aqueous polyester resin are uniformly mixed, are slowly added to carboxymethyl chitosan, mill base, base material
Wetting agent, levelling agent, antifoaming agent, ultra-violet absorber, fungicide and cosolvent add thickener, are obtained after filtering and discharging
Component A；
(2) isocyanate curing agent, adhesion promoter and cosolvent are mixed, filtering and discharging obtains component B；
(3) obtained component A with B component is mixed in proportion, obtains aqueous double-component finishing coat.
10. the preparation method of aqueous double-component finishing coat according to claim 9, it is characterised in that：120-200 is used during filtering
Purpose strainer.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109735147A (en) * | 2018-11-21 | 2019-05-10 | 镇江禹亨新材料有限公司 | A kind of aqueous polyurethane finishing coat of high adhesion force |
| CN111961402A (en) * | 2020-08-31 | 2020-11-20 | 东莞大宝化工制品有限公司 | Water-based double-component high-gloss white finish paint and preparation method and application method thereof |
| CN112500752A (en) * | 2020-11-18 | 2021-03-16 | 雅图高新材料股份有限公司 | Water-based bi-component finish paint and preparation method thereof |
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| CN109735147A (en) * | 2018-11-21 | 2019-05-10 | 镇江禹亨新材料有限公司 | A kind of aqueous polyurethane finishing coat of high adhesion force |
| CN111961402A (en) * | 2020-08-31 | 2020-11-20 | 东莞大宝化工制品有限公司 | Water-based double-component high-gloss white finish paint and preparation method and application method thereof |
| CN112500752A (en) * | 2020-11-18 | 2021-03-16 | 雅图高新材料股份有限公司 | Water-based bi-component finish paint and preparation method thereof |
| CN113897126A (en) * | 2021-11-30 | 2022-01-07 | 江苏科祥防腐材料有限公司 | Curing agent for improving water resistance of water-based material and preparation method thereof |
| CN115449269A (en) * | 2022-09-23 | 2022-12-09 | 深圳市深赛尔股份有限公司 | Water-based fluorine-modified siloxane acrylic coating and preparation method and application thereof |
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