CN109293833A - The preparation method of styrene-butadiene latex and products thereof for building coating - Google Patents
The preparation method of styrene-butadiene latex and products thereof for building coating Download PDFInfo
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- CN109293833A CN109293833A CN201710610502.XA CN201710610502A CN109293833A CN 109293833 A CN109293833 A CN 109293833A CN 201710610502 A CN201710610502 A CN 201710610502A CN 109293833 A CN109293833 A CN 109293833A
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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
- C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F212/06—Hydrocarbons
- C08F212/08—Styrene
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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
- C08F2/00—Processes of polymerisation
- C08F2/12—Polymerisation in non-solvents
- C08F2/16—Aqueous medium
- C08F2/22—Emulsion polymerisation
- C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
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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
- C08F2/00—Processes of polymerisation
- C08F2/38—Polymerisation using regulators, e.g. chain terminating agents, e.g. telomerisation
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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
- C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F212/06—Hydrocarbons
- C08F212/12—Monomers containing a branched unsaturated aliphatic radical or a ring substituted by an alkyl radical
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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
- C08F236/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds
- C08F236/02—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds
- C08F236/04—Copolymers of compounds having one or more unsaturated aliphatic radicals, at least one having two or more carbon-to-carbon double bonds the radical having only two carbon-to-carbon double bonds conjugated
- C08F236/06—Butadiene
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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
- C09D109/00—Coating compositions based on homopolymers or copolymers of conjugated diene hydrocarbons
- C09D109/06—Copolymers with styrene
- C09D109/08—Latex
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Abstract
The present invention provides a kind of preparation methods of styrene-butadiene latex for building coating, further relate to the styrene-butadiene latex as made from the preparation method.Wherein, the preparation method of styrene-butadiene latex is the following steps are included: carboxylic acid monomer, (methyl) acrylate monomer, butadiene, (methyl) styrene monomer, silane, titanate esters, molecular weight regulator, emulsifier, initiator and distilled water are added into compressive reaction kettle; is stirred; heating carries out free radical emulsion copolyreaction；It is cooling；Add the hydroxide of alkali metal to adjust pH to 6~9, filters to get styrene-butadiene latex product.The preparation method of styrene-butadiene latex provided by the present invention is easy to operate, environmentally protective；Styrene-butadiene latex product excellent combination property provided by the present invention is suitable for building coating, can significantly improve the adhesive force and water resistance of building coating coating, therefore, has a good application prospect and market potential.
Description
Technical field
The invention belongs to building coating technical fields, and in particular to a kind of preparation side of the styrene-butadiene latex for building coating
Method further relates to the styrene-butadiene latex as made from the preparation method.
Background technique
Styrene-butadiene latex is to add a small amount of carboxylic acid and other auxiliary agents with butadiene, styrene, the copolymerization generated by emulsion polymerization
Object, usually a kind of milky aqueous dispersion with bluish violet gloss, according to styrene-content, emulsifier and polymerization temperature etc.
Difference, obtained is many kinds of, and performance and purposes are also different.
The higher styrene-butadiene latex of combinated styrene content ratio, usual cohesive force with higher and conjunctiva intensity, mechanical and change
Learn the advantages that stability is good, and mobility, storage stability are good, and loading is big.Due to introducing polar group --- carboxyl is led
The conjunctiva intensity and cohesive force for causing the styrene-butadiene latex of preparation with higher, water resistant impressionability and wearability are strong, stability, stream
Dynamic property is all good, and loading is big, and moldability is good, and mechanical, chemical excellent with freeze-thaw stability, this product and pigment, filler compatibility are good,
Storage stability is preferable.
Wherein, a series of styrene-butadiene latexes are used as the binder of building coating.Currently, commercial styrene-butadiene latex reacts in addition
The surfactant of property is as emulsifier, including anionic surfactant and nonionic surfactant.However, medium-sized
Emulsifier is compatible with polymer body because being difficult after emulsion film forming, the boundary for being readily migrate into the surface of film or being connected with substrate
Face and the water resistance of film is deteriorated, and the adhesive force between film and substrate is deteriorated.For example, Chinese patent application CN
103524675 A provide a kind of preparation method of modified butadiene-styrene latex, and anion and the compound emulsifier of nonionic has been made,
The water resistance for the building coating that there is high stability, but be made by the styrene-butadiene latex using the styrene-butadiene latex of the method preparation,
Adhesive force is poor.
Summary of the invention
In order to overcome various technological deficiencies existing in the prior art, the particular kind of silane of inventor's proposed adoption and metatitanic acid
Ester is to prepare a kind of completely new styrene-butadiene latex product for building coating, so that the styrene-butadiene latex product is after forming coating
With higher water resistance, and to generate stronger adhesive force between substrate and coating.
Specifically, the present invention provides following technical schemes:
A kind of preparation method of styrene-butadiene latex for building coating according to a first aspect of the present invention, including following step
It is rapid:
S1: carboxylic acid monomer, (methyl) acrylate monomer, butadiene, (methyl) styrene are added into compressive reaction kettle
Monomer, silane, titanate esters, molecular weight regulator, emulsifier, initiator and distilled water, are stirred, heating, and carry out freedom
Base emulsion copolyreaction；
S2: after the reaction was completed, cooling；
S3: add the hydroxide of alkali metal to adjust pH to 6~9, filter to get styrene-butadiene latex product；
Wherein, the proportion by weight of each material added are as follows:
Preferably, in the above preparation method, the proportion by weight of each material are as follows:
Wherein, the hydroxide of the alkali metal is, for example, sodium hydroxide, potassium hydroxide, lithium hydroxide, preferably hydrogen-oxygen
Change sodium；Also, during actually adding, generally added in the form of the sodium hydrate aqueous solution of 10wt%~40wt%.
Preferably, the duration of the free radical emulsion copolyreaction described in the S1 of above-mentioned preparation method is 3~10
Hour, reaction temperature is 60~90 DEG C.Wherein, the duration of the free radical emulsion copolyreaction refers to: reacting in S1
The dropwise addition total time of material and the sum of the time for being heated to insulation reaction after 60~90 DEG C.
It is further preferred that in the above preparation method, the carboxylic acid monomer is selected from following any one or more combination:
Acrylic acid, methacrylic acid, maleic acid, fumaric acid and itaconic acid.
It is further preferred that in the above preparation method, (methyl) acrylate monomer be selected from it is following any or
A variety of combination: acrylonitrile, methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, acrylic acid -2- second
The own ester of base, methyl methacrylate, ethyl methacrylate, n-BMA, methacrylic acid -2- ethylhexyl,
Acrylic acid and methacrylic acid C8~C16Arrcostab.On this basis, described (methyl) acrylate monomer is still more preferably
For at least one of n-butyl acrylate, methyl methacrylate, acrylic acid-2-ethyl caproite.
It is further preferred that in the above preparation method, the silane is selected from following any one or more combination: γ-
(the third oxygen of 2,3- epoxy) propyl trimethoxy silicane, aminopropyl trimethoxysilane, gamma-aminopropyl-triethoxy-silane, 3- ammonia
Propyl-triethoxysilicane, γ-glycidyl ether oxygen propyl trimethoxy silicane, γ-methacryloxypropyl trimethoxy
Base silane, N-2- (aminoethyl) -3- aminopropyl trimethoxysilane.
It is further preferred that in the above preparation method, the titanate esters are selected from following any one or more combination: different
Propyl three (dioctylphyrophosphoric acid acyloxy) titanate esters, Di(dioctylpyrophosphato) ethylene titanate, three oil of isopropyl
Sour acyloxy titanate esters, tetrabutyl titanate.
It is further preferred that in the above preparation method, the molecular weight regulator is selected from following any one or more
Combination: n- dodecyl mereaptan, tert-dodecyl mercaptan, n-butyl mercaptan.
It is further preferred that in the above preparation method, the emulsifier is selected from following any one or more combination: alkene
Propyl polyoxyethylene ether ammonium sulfate, allyl polyethenoxy ether, vinyl polyoxyethylene ether.
It is further preferred that in the above preparation method, the initiator is selected from following any one or more combination: mistake
Potassium sulfate, sodium peroxydisulfate, ammonium persulfate.
A kind of styrene-butadiene latex for building coating according to a second aspect of the present invention, as described in first aspect present invention
Preparation method be made, and its weight solid content be 40%~60%.
In addition, it is worth noting that, inventor is it was unexpectedly observed that add the silane and titanate esters energy of particular types and dosage
The water resistance of latex is enough substantially improved, which can also significantly improve the water-fast of coating after forming coating
Property, and to generate stronger adhesive force between metope substrate and coating.This may be since silane has certain crosslinking
Effect, after the styrene-butadiene latex comprising silane is applied to building coating, the siloxy in silane can be with the carbonic acid in building coating
The surface of pigments Interaction of substituents such as calcium, kaolin, thus show as the scrubbing resistance of building coating, adhesive force significantly improves, and
Water-resistant coating has clear improvement；Meanwhile titanate esters and silane have certain synergistic effect, so that styrene-butadiene latex is comprehensive
It can significantly improve；In addition, common emulsifier is replaced using reactive emulsifier in preparation method of the present invention, thus
It can preferably be aggregated on the macromolecular chain of styrene-butadiene latex, after being applied to building coating, will not be free in the drying process
In coating surface and system, to reduce painting layer absorbent, therefore the building coating containing styrene-butadiene latex of the present invention has
Better water resistance.
In conclusion the preparation method of styrene-butadiene latex provided by the present invention is easy to operate, it is environmentally protective；The present invention is mentioned
The styrene-butadiene latex product excellent combination property of confession is suitable for building coating, can significantly improve the adhesive force of building coating coating
It therefore has a good application prospect and market potential with water resistance.
Specific embodiment
The present invention is further elaborated With reference to embodiment, but the present invention is not limited to following embodiment party
Formula.
A kind of preparation method of the styrene-butadiene latex for building coating, comprising the following steps:
S1: carboxylic acid monomer, (methyl) acrylate monomer, butadiene, (methyl) styrene are added into compressive reaction kettle
Monomer, silane, titanate esters, molecular weight regulator, emulsifier, initiator and distilled water, are stirred, heating, and carry out freedom
Base emulsion copolyreaction；
S2: after the reaction was completed, cooling；
S3: add the hydroxide of alkali metal to adjust pH to 6~9, filter to get styrene-butadiene latex product；
Wherein, the proportion by weight of each material added are as follows:
In a preferred embodiment, the duration of free radical emulsion copolyreaction described in S1 is 3~10 hours,
Reaction temperature is 60~90 DEG C.
In a further preferred embodiment, the carboxylic acid monomer is selected from following any one or more combination: third
Olefin(e) acid, methacrylic acid, maleic acid, fumaric acid and itaconic acid.
In a further preferred embodiment, (methyl) acrylate monomer is selected from following any one or more
Combination: acrylonitrile, methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, acrylic acid-2-ethyl oneself
Ester, methyl methacrylate, ethyl methacrylate, n-BMA, methacrylic acid -2- ethylhexyl, propylene
Acid and methacrylic acid C8~C16Arrcostab.
In a further preferred embodiment, the silane is selected from following any one or more combination: γ-(2,
The third oxygen of 3- epoxy) propyl trimethoxy silicane, aminopropyl trimethoxysilane, gamma-aminopropyl-triethoxy-silane, 3- aminopropyl
Triethoxysilane, γ-glycidyl ether oxygen propyl trimethoxy silicane, γ-methacryloxypropyl trimethoxy silicon
Alkane, N-2- (aminoethyl) -3- aminopropyl trimethoxysilane.
In a further preferred embodiment, the titanate esters are selected from following any one or more combination: isopropyl
Base three (dioctylphyrophosphoric acid acyloxy) titanate esters, Di(dioctylpyrophosphato) ethylene titanate, three oleic acid of isopropyl
Acyloxy titanate esters, tetrabutyl titanate.
In a further preferred embodiment, the molecular weight regulator is selected from following any one or more group
It closes: n- dodecyl mereaptan, tert-dodecyl mercaptan, n-butyl mercaptan.
In a further preferred embodiment, the emulsifier is selected from following any one or more combination: allyl
Base polyoxyethylene ether ammonium sulfate, allyl polyethenoxy ether, vinyl polyoxyethylene ether.
In a further preferred embodiment, the initiator is selected from following any one or more combination: over cure
Sour potassium, sodium peroxydisulfate, ammonium persulfate.
A kind of styrene-butadiene latex for building coating, the preparation method as described in first aspect are made, and its weight
Solid content is 40%~60%.
Embodiment 1
Styrene-butadiene latex is prepared according to the following steps:
First 2000ml compressive reaction kettle is vacuumized, vacuum degree -0.095MPa, 0.1 gram of allyl polyethenoxy ether is added
Ammonium sulfate, 0.1 gram of potassium peroxydisulfate, 50 grams of distilled water are completely dissolved into aqueous solution, open stirring, are warming up to 60 DEG C；Simultaneously 60
1 gram of acrylic acid, 10 grams of butadiene, 100 grams of styrene, 0.2 gram of n- dodecyl mereaptan, 0.2 gram of isopropyl three (two are added dropwise under the conditions of DEG C
Octyl pyrophosphoric acid acyloxy) titanate esters, 0.5 gram of γ-methacryloxypropyl trimethoxy silane mix monomer；And it drips
Add the mixed aqueous solution of 0.4 gram of allyl polyethenoxy ether ammonium sulfate, 0.4 gram of potassium peroxydisulfate, 21.93 grams of distilled water；It is added dropwise total
Time is 6 hours, is sufficiently stirred.Continue to keep the temperature 4 hours at 60 DEG C after completion of dropwise addition.After the reaction was completed, 25 DEG C are cooled to, with 5
Gram 20wt% sodium hydrate aqueous solution neutralizes；Through 100 mesh net filtrations, the styrene-butadiene latex for building coating, solid content are obtained
59.95wt%, pH=6.08 (are measured) using PHS-3C Accurate pH.
Embodiment 2
Styrene-butadiene latex is prepared according to the following steps:
First 2000ml compressive reaction kettle is vacuumized, vacuum degree -0.095MPa, 2 grams of allyl polyethenoxy ether sulphur are added
Sour ammonium, 1 gram of sodium peroxydisulfate, 500 grams of distilled water, 5 grams of styrene are completely dissolved into aqueous solution, open stirring, are warming up to 90 DEG C；
5 grams of methacrylic acids, 50 grams of n-butyl acrylates, 50 grams of methyl methacrylates, 200 grams of fourths are added dropwise under the conditions of 90 DEG C simultaneously
Diene, 95 grams of methyl styrenes, 2 grams of tert-dodecyl mercaptans, 2 grams of three oleic acid acyloxy titanate esters of isopropyl, 2 grams of N-2- (ammonia second
Base) -3- aminopropyl trimethoxysilane, 3 grams of γ-(the third oxygen of 2,3- epoxy) propyl trimethoxy silicanes mix monomer；And it drips
Add the mixed aqueous solution of 3 grams of allyl polyethenoxy ethers, 4 grams of sodium peroxydisulfates, 111 grams of distilled water；It is 2 hours that total time, which is added dropwise,
It is sufficiently stirred.Continue to keep the temperature 1 hour at 90 DEG C after completion of dropwise addition.After the reaction was completed, 25 DEG C are cooled to, with 12.5 grams of 40wt% hydrogen
Aqueous solution of sodium oxide neutralizes；Through 100 mesh net filtrations, the styrene-butadiene latex for building coating is obtained, solid content 40.12wt%,
PH=8.76 (is measured) using PHS-3C Accurate pH.
Embodiment 3
Styrene-butadiene latex is prepared according to the following steps:
First 2000ml compressive reaction kettle is vacuumized, vacuum degree -0.095MPa, 0.5 gram of vinyl polyoxyethylene ether is added,
0.5 gram of ammonium persulfate, 150 grams of distilled water, 2 grams of styrene are completely dissolved into aqueous solution, open stirring, are warming up to 80 DEG C；Simultaneously
3 grams of methacrylic acids, 100 grams of butadiene, 98 grams of styrene, 1 gram of n- dodecyl mereaptan, 1 gram of metatitanic acid is being added dropwise just under the conditions of 80 DEG C
Butyl ester, 0.5 gram of gamma-aminopropyl-triethoxy-silane, 2 grams of γ-glycidyl ether oxygen propyl trimethoxy silicane mix monomers；
And the mixed aqueous solution of 2 grams of allyl polyethenoxy ether ammonium sulfate, 2 grams of ammonium persulfates, 58.5 grams of distilled water is added dropwise；When being added dropwise total
Between be 4 hours, be sufficiently stirred.Continue to keep the temperature 2 hours at 80 DEG C after completion of dropwise addition.After the reaction was completed, 25 DEG C are cooled to, with 10 grams
30wt% sodium hydrate aqueous solution neutralizes；Through 100 mesh net filtrations, the styrene-butadiene latex for building coating, solid content are obtained
50.15wt%, pH=7.38 (are measured) using PHS-3C Accurate pH.
Embodiment 4
Styrene-butadiene latex is prepared according to the following steps:
First 2000ml compressive reaction kettle is vacuumized, vacuum degree -0.095MPa, 0.2 gram of allyl polyethenoxy ether is added,
0.3 gram of ammonium persulfate, 2 grams of maleic acids, 2 grams of fumaric acid, 100 grams of distilled water are completely dissolved into aqueous solution, open stirring, heating
To 75 DEG C；Simultaneously under the conditions of 75 DEG C be added dropwise 50 grams of acrylic acid-2-ethyl caproites, 60 grams of butadiene, 100 grams of methyl styrenes,
1.5 grams of n-butyl mercaptans, 0.5 gram of three oleic acid acyloxy titanate esters of isopropyl, 1 gram of aminopropyl trimethoxysilane, 1 gram of 3- aminopropyl
The mix monomer of triethoxysilane；And 1.8 grams of allyl polyethenoxy ether ammonium sulfate, 1.5 grams of sodium peroxydisulfates, 139.98 are added dropwise
The mixed aqueous solution of gram distilled water；It is 3 hours that total time, which is added dropwise, is sufficiently stirred.Continue after completion of dropwise addition small in 75 DEG C of heat preservations 3
When.After the reaction was completed, 25 DEG C are cooled to, is neutralized with 40 grams of 10wt% sodium hydrate aqueous solutions；Through 100 mesh net filtrations, obtain
For the styrene-butadiene latex of building coating, solid content 45.11wt%, pH=8.43 (are measured) using PHS-3C Accurate pH.
Embodiment 5
Styrene-butadiene latex is prepared according to the following steps:
First 2000ml compressive reaction kettle is vacuumized, vacuum degree -0.095MPa, 1 gram of allyl polyethenoxy ether sulphur is added
Sour ammonium, 0.2 gram of potassium peroxydisulfate, 1 gram of fumaric acid, 10 grams of styrene, 100 grams of distilled water are completely dissolved into aqueous solution, and unlatching is stirred
It mixes, is warming up to 85 DEG C；1 gram of acrylic acid, 75 grams of ethyl acrylates, 40 grams of butadiene, 90 grams of benzene is added dropwise under the conditions of 85 DEG C simultaneously
Ethylene, 0.2 gram of n- dodecyl mereaptan, 0.4 gram of tert-dodecyl mercaptan, 1.5 grams of Di(dioctylpyrophosphato) ethylene titanate, 3
Gram γ-glycidyl ether oxygen propyl trimethoxy silicane, 1 gram of γ-methacryloxypropyl trimethoxy silane mixing
Monomer；And the mixed aqueous solution of 3 grams of allyl polyethenoxy ether ammonium sulfate, 0.8 gram of potassium peroxydisulfate, 80.26 grams of distilled water is added dropwise；
It is 5 hours that total time, which is added dropwise, is sufficiently stirred.Continue to keep the temperature 2 hours at 85 DEG C after completion of dropwise addition.After the reaction was completed, 25 are cooled to
DEG C, it is neutralized with 10 gram of 20% potassium hydroxide aqueous solution；Through 100 mesh net filtrations, the styrene-butadiene latex for building coating is obtained, Gu
Content 55.10wt%, pH=7.67 (are measured) using PHS-3C Accurate pH.
Comparative example
Method as disclosed in Chinese patent application CN103524675A prepares styrene-butadiene latex.
On this basis, inventor has detected above-described embodiment 1~5 and comparison according to GB/T 1733-93 standard respectively
The water-resistance property of coating of styrene-butadiene latex made from example specifically observes the test plate (panel) feelings that part is infiltrated by deionized water in deionized water
As a result condition see the table below 1:
Table 1
| Sample | 24 hours | 48 hours | 72 hours |
| Comparative example | Become blue | Bleach | Bleach |
| Embodiment 1 | It is unchanged | It is unchanged | It is slight to become blue |
| Embodiment 2 | It is unchanged | It is unchanged | It is slight to become blue |
| Embodiment 3 | It is unchanged | It is unchanged | It is slight to become blue |
| Embodiment 4 | It is unchanged | It is unchanged | It is slight to become blue |
| Embodiment 5 | It is unchanged | It is unchanged | It is slight to become blue |
It can be seen that building coating will be applied to by styrene-butadiene latex made from 1~5 according to an embodiment of the present invention, compared to right
Styrene-butadiene latex made from ratio has better water resistance.
In addition, inventor uses styrene-butadiene latex made from above-described embodiment 1~5 and comparative example respectively, according to matching below
Side prepares emulsion paint:
Table 2
Each component shown in upper table 2 is added in high speed disperser, after mixing evenly 20~30min of high speed dispersion, directly
To fineness qualification, then, (styrene-butadiene latex therein is respectively from Examples 1 to 5 for each component in addition the following table 3 under the low speed
With comparative example):
Table 3
| Ingredient names | Specifications and models | Mass parts |
| Styrene-butadiene latex | 50wt% | 309.4 |
| Thickener | Keltex P 2% | 154.5 |
| Mill base | 711.2 | |
| It is total | 1175.1 |
It stirs, discharges, filter up to emulsion paint.Then, inventor examines respectively according to GB 9266-88 standard
The abrasion resistance of the coating of above-mentioned each emulsion paint coating is surveyed, testing result is as follows:
Table 4
| Sample | Abrasion resistance |
| Comparative example | It is obvious to scrub 9015 abrasions |
| Embodiment 1 | 12432 times are scrubbed without abrasion |
| Embodiment 2 | 13056 times are scrubbed without abrasion |
| Embodiment 3 | 12134 times are scrubbed without abrasion |
| Embodiment 4 | 12543 times are scrubbed without abrasion |
| Embodiment 5 | 13108 times are scrubbed without abrasion |
It can be seen that being applied made of the coating of emulsion paint made from the styrene-butadiene latex described in the embodiment of the present invention 1~5
Layer, can be greatly enhanced the adhesive force between coating and substrate.
Specific embodiments of the present invention are described in detail above, but it is merely an example, the present invention is simultaneously unlimited
It is formed on particular embodiments described above.To those skilled in the art, any couple of present invention carries out equivalent modifications and
Substitution is also all among scope of the invention.Therefore, without departing from the spirit and scope of the invention made by equal transformation and
Modification, all should be contained within the scope of the invention.
Claims (10)
1. a kind of preparation method of the styrene-butadiene latex for building coating, which comprises the following steps:
S1: into compressive reaction kettle be added carboxylic acid monomer, (methyl) acrylate monomer, butadiene, (methyl) styrene monomer,
Silane, titanate esters, molecular weight regulator, emulsifier, initiator and distilled water, are stirred, heating, and carry out free radical emulsion
Copolyreaction；
S2: after the reaction was completed, cooling；
S3: add the hydroxide of alkali metal to adjust pH to 6~9, filter to get styrene-butadiene latex product；
Wherein, the proportion by weight of each material added are as follows:
2. preparation method according to claim 1, which is characterized in that free radical emulsion copolyreaction holds described in S1
The continuous time is 3~10 hours, and reaction temperature is 60~90 DEG C.
3. preparation method according to claim 1 or 2, which is characterized in that the carboxylic acid monomer be selected from it is following any or
A variety of combination: acrylic acid, methacrylic acid, maleic acid, fumaric acid and itaconic acid.
4. preparation method according to claim 1 or 2, which is characterized in that (methyl) acrylate monomer be selected from
Under any one or more combination: acrylonitrile, methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate,
Acrylic acid-2-ethyl caproite, methyl methacrylate, ethyl methacrylate, n-BMA, methacrylic acid-
2- ethylhexyl, acrylic acid and methacrylic acid C8~C16Arrcostab.
5. preparation method according to claim 1 or 2, which is characterized in that the silane is selected from following any one or more
Combination: γ-(the third oxygen of 2,3- epoxy) propyl trimethoxy silicane, aminopropyl trimethoxysilane, gamma-aminopropyl-triethoxy
Silane, 3- aminopropyl triethoxysilane, γ-glycidyl ether oxygen propyl trimethoxy silicane, γ-methacryloxy third
Base trimethoxy silane, N-2- (aminoethyl) -3- aminopropyl trimethoxysilane.
6. preparation method according to claim 1 or 2, which is characterized in that the titanate esters are selected from following any or more
Kind combination: isopropyl three (dioctylphyrophosphoric acid acyloxy) titanate esters, Di(dioctylpyrophosphato) ethylene titanate,
Three oleic acid acyloxy titanate esters of isopropyl, tetrabutyl titanate.
7. preparation method according to claim 1 or 2, which is characterized in that the molecular weight regulator is selected from following any
Kind or a variety of combinations: n- dodecyl mereaptan, tert-dodecyl mercaptan, n-butyl mercaptan.
8. preparation method according to claim 1 or 2, which is characterized in that the emulsifier is selected from following any or more
The combination of kind: allyl polyethenoxy ether ammonium sulfate, allyl polyethenoxy ether, vinyl polyoxyethylene ether.
9. preparation method according to claim 1 or 2, which is characterized in that the initiator is selected from following any or more
The combination of kind: potassium peroxydisulfate, sodium peroxydisulfate, ammonium persulfate.
10. a kind of styrene-butadiene latex for building coating, which is characterized in that the styrene-butadiene latex is by according to claim 1~9
Described in any item preparation methods are made, and its weight solid content is 40%~60%.
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