CN102134427B - Water-based acrylic finish paint and preparation method thereof - Google Patents

Water-based acrylic finish paint and preparation method thereof Download PDF

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Publication number
CN102134427B
CN102134427B CN201110039067A CN201110039067A CN102134427B CN 102134427 B CN102134427 B CN 102134427B CN 201110039067 A CN201110039067 A CN 201110039067A CN 201110039067 A CN201110039067 A CN 201110039067A CN 102134427 B CN102134427 B CN 102134427B
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water
agent
acrylic acid
coat
finish paint
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CN201110039067A
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Chinese (zh)
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CN102134427A (en
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章卫国
彭时贵
刘雄鹰
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株洲飞鹿高新材料技术股份有限公司
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Abstract

The invention provides a water-based acrylic finish paint which comprises the following components in percentage by weight: 30-65% of water-based acrylic resin, 0.5-5% of dispersant, 0.1-5% of defoaming agent, 0.1-5% of base wetting agent, 10-30% of pigment and filler, 1-10% of pH regulator, 1-10% of thixotropic agent, 1-10% of flash etching inhibitor, 0.5-5% of film-forming assistant, 1-5% of light stabilizer and 5-20% of deionized water. The water-based acrylic finish paint provided by the invention is a single component paint, and is prepared from water-based acrylic resin used as a base, and multiple assistants. The water-based acrylic finish paint has the advantages of excellent aging resistance and high weather resistance. The experiment proves that the ultraviolet aging resistance of the water-based acrylic finish paint is up to 600 hours. In addition, the water-based acrylic finish paint also has the advantages of high thermal stability, favorable mechanical properties and outstanding freeze-thawing stability, satisfies the environmental-protection requirement, has a very high practical value, and is suitable for the occasions which require long-term aging resistance and have a high environmental-protection requirement.

Description

A kind of water-based acrylic acid top-coat and preparation method thereof
Technical field
The present invention relates to paint field, be specifically related to a kind of water-based acrylic acid top-coat and preparation method thereof.
Background technology
Finish paint is the final coating of application, and material therefor is had higher requirement, is divided into solvent borne finish paint and aqueous finish paint.The tradition finish paint mainly adopt solvent borne in the majority, but the solvent borne finish paint with organism as solvent, can bring the discharging of VOC (volatile organic compounds) after the application, contaminate environment works the mischief to HUMAN HEALTH.
As solvent, nontoxic, solvent-free smell than the more environmental protection of solvent borne finish paint, can be used for application building, rail vehicles etc. to aqueous finish paint with water.Aqueous finish paint is prepared from water-base resin, water, pigment and auxiliary agent; Wherein the key of research is a water-base resin; Through the development of decades, at present main water-base resin system is by water alcohol acid, water soluble acrylic acid, water-base epoxy, waterborne polyurethane resin, aqueous inorganic silicate, water-based fluororesin and their modified resin.
Because the moderate cost of vinyl resin, nontoxic, the odorlessness of water-based acrylic acid top-coat does not have and fires danger, and construction safety is convenient, fast drying, and acid and alkali-resistance, ageing-resistant, weathering resistance is strong, so the application of rail vehicles generally uses acrylics to prepare finish paint.But along with vehicle paintwork require increasingly highly, the current in addition period of vehicle maintenance that requires was increased to 16 years from 8 years, had realized railway locomotive lifelong " repair in shop ", made that effective requirement for anticorrosion of coating is higher than in the past.In the long-effective corrosion field, finish paint is as top coating, and the important indicator of estimating its quality height is a stability to aging, and the ultraviolet resistance of existing water-based acrylic acid top-coat is aging to be generally about 400h, has been difficult to satisfy the requirement of long-effective corrosion system under the present high request.
Summary of the invention
The problem that the present invention solves is to provide a kind of water-based acrylic acid top-coat, and ageing-resistant performance is outstanding, can satisfy the anticorrosion high request of rail vehicles application.The present invention also provides a kind of preparation method of water-based acrylic acid top-coat.
For solving the problems of the technologies described above, technical scheme of the present invention is:
A kind of water-based acrylic acid top-coat comprises following component in percentage by weight:
Water-borne acrylic resin 30%~65%
Dispersion agent 0.5%~5%
Skimmer 0.1%~5%
Base material wetting agent 0.1%~5%
Color stuffing 10%~30%
PH regulator agent 0.5%~10%
Thixotropic agent 0.5%~10%
Dodge corrosion inhibitor 1%~10%
Film coalescence aid 0.5%~5%
Photostabilizer 1%~5%
Deionized water 5%~20%.
As preferably, the copolymerization raw material of said water-borne acrylic resin comprises following component in percentage by weight: acrylate monomer 5%~15%, methacrylate monomers 30%~70% and epoxy-modified acrylic acid monomer 15%~40%.
As preferably, said dispersion agent is one or more among ammonium polyacrylate salt, polyacrylic acid sodium salt, poly carboxylic acid ammonium salt or the polycarboxylate sodium.
As preferably, said skimmer is silicone antifoam agent or polysiloxane defoamers.
As preferably, said base material wetting agent is a polyether siloxane copolymer.
As preferably, said color stuffing is one or more in white titanium pigment, talcum powder, carbon black, mica powder, ceramic or the silicon powder.
As preferably, said pH regulator agent is ammoniacal liquor, N, one or more in N-dimethylethanolamine, 2-amino-2-methyl-1-propanol or the trolamine.
As preferably, said thixotropic agent is one or more in aerosil, organobentonite, THIXCIN or the polyamide wax.
As preferably, one or more in the verivate that said sudden strain of a muscle corrosion inhibitor is a benzisothiazole, phthalimide, Sodium Nitrite, tert-butylamine, alkyl imidazole and the sad amine.
As preferably, said film coalescence aid is one or both in pure ether compound or the 12 carbon alcohol esters.
As preferably, said photostabilizer is one or more in hindered amines, benzophenone or the benzotriazole category.
A kind of preparation method of water-based acrylic acid top-coat may further comprise the steps:
A) deionized water, dispersion agent, color stuffing, pH regulator agent and thixotropic agent are mixed stirring, grind;
B) with stirring in water-borne acrylic resin, skimmer, base material wetting agent, sudden strain of a muscle corrosion inhibitor, film coalescence aid and the photostabilizer adding mixture that upward step obtains;
C) with b) mixture that obtains carries out filtering and impurity removing;
D) pH of adjusting mixture is 8~9, viscosity >=3.0Pas;
The weight percent content of each composition is: water-borne acrylic resin 30%~65%, dispersion agent 0.5%~5%, skimmer 0.1%~5%; Base material wetting agent 0.1%~5%, color stuffing are 10%~30%, pH regulator agent 0.5%~10%; Thixotropic agent 0.5%~10% dodges corrosion inhibitor 1%~10%, film coalescence aid 0.5%~5%; Photostabilizer 1%~5%, deionized water 5%~20%.
As preferably, saidly mixture is milled to fineness≤40 μ m in a).
Water-based acrylic acid top-coat provided by the invention is a single-component, is base-material with the water-borne acrylic resin, adds multiple auxiliary agent and is prepared from; Have excellent stability to aging, weathering resistance is strong, through the aging 600h that is of experiment ultraviolet resistance; Also have good thermostability in addition, mechanical property, freeze-thaw stability are given prominence to, and compliance with environmental protection requirements; Have practical value, be suitable for requirement and have long-acting stability to aging, the occasion that environmental requirement is high.
Embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiment of the invention is described, describe just to further specifying feature and advantage of the present invention but should be appreciated that these, rather than to the restriction of claim of the present invention.
The invention provides a kind of water-based acrylic acid top-coat, be single-component coating, comprise following component in percentage by weight: water-borne acrylic resin 30%~65%, dispersion agent 0.5%~5%; Skimmer 0.1%~5%, base material wetting agent 0.1%~5%, color stuffing are 10%~30%; PH regulator agent 0.5%~10%, thixotropic agent 0.5%~10% dodges corrosion inhibitor 1%~10%; Film coalescence aid 0.5%~5%, photostabilizer 1%~5%, deionized water 5%~20%.
Water-borne acrylic resin is the staple of water-based acrylic acid top-coat, owing to its main absorption peak to light is in outside the solar spectrum scope, so the water soluble acrylic acid that makes has photostabilization and outdoor stability to aging.The copolymerization raw material of the water-borne acrylic resin that the present invention uses comprises following component in percentage by weight: acrylate monomer 5%~15%, methacrylate monomers 30%~70% and epoxy-modified acrylic acid monomer 15%~40%.
Dispersion agent can disperse color stuffing through wetting, grinding and the stable process of dispersion, coupling and parcel, and keeps the relatively stable of dispersion system.Dispersion agent is preferably one or more among ammonium polyacrylate salt, polyacrylic acid sodium salt, poly carboxylic acid ammonium salt or the polycarboxylate sodium among the present invention; Has good dispersion effect; Can reduce dope viscosity, improve stability in storage, increase gloss and the leveling characteristics of coating.
Auxiliary agent in the finish paint belongs to tensio-active agent mostly; Can change the surface tension of finish paint; Cause finish paint itself to exist the easy internal factor that bubbles or make foam stabilization, need in the preparation process of finish paint to use various high-speed mixers, use methods such as spraying, showering during application; In these processes, all can make finish paint produce foam.Air in the foam not only can hinder the dispersion of color stuffing, also makes usage ratio of equipment not enough and influence output, and the bubble that produces in the construction can cause the coating surface defective, has both diminished outward appearance, influences the preservative property and the weathering resistance of paint film again.Therefore for preventing in use to produce foam, need to add skimmer in the finish paint.Skimmer is silicone antifoam agent or polysiloxane defoamers among the present invention, and chemical property is stable, and the froth breaking effect is strong, and consumption is few.
The base material wetting agent can help the moistening various substrate surface of finish paint, even moisteningly has a very base material of low surface energy, therefore can prevent such as surface imperfection such as shrinkage cavity or cissings the flowing of paint film, leveling characteristics and attach outstanding power and also will be improved.The base material wetting agent is a polyether siloxane copolymer among the present invention.
Color stuffing is white titanium pigment, talcum powder, carbon black, mica powder, ceramic or silicon powder has important booster action to the performance of coating, can the filling hole, and make coating fine and close, improve sticking power, give coating color, texture and opacifying power.
The pH regulator agent is ammoniacal liquor, N, one or more in N-dimethylethanolamine, 2-amino-2-methyl-1-propanol or the trolamine.
After adding thixotropic agent in the finish paint, when finish paint receives shear action (as stirring or brushing), viscosity temporarily descends, and when not receiving shear action, returns to original viscosity again gradually.This specific character can make finish paint when storing, prevent the pigment deposition, improves brushing property, when application, can make to film thicker and sagging not.The thixotropic agent that the present invention uses is in aerosil, organobentonite, THIXCIN or the polyamide wax one or more.
Because the electric conductivity of water is high, makes metal perishable, the distinct issues that aqueous finish paint is coated on the metal substrate are erosion to occur dodging.Dodging erosion is the point-like rust staining of filming and in drying process, taking place, and outstanding being prone to taken place on the sandblast ground.Dodge corrosion inhibitor and can prevent that aqueous finish paint from taking place to dodge lose on metal substrate, the sudden strain of a muscle corrosion inhibitor that the present invention uses is in verivate, phthalimide, Sodium Nitrite, tert-butylamine, alkyl imidazole and the sad amine of benzisothiazole one or more.
Film coalescence aid can promote finish paint plastic flow and recoverable deformation, improves the coalescence performance, can be in film forming in the construction temperature scope extensively, and the film coalescence aid volatilization can not influence the characteristic of filming after the film forming.The membrane-forming agent that the present invention uses is in pure ether compound or the 12 carbon alcohol esters one or both; Under less consumption situation, can very reduce the minimum film-forming temperature of coating effectively, film forming continuity is good; Has suitable volatility; Combine when making coating become mould more closely, continuously, paint film is level and smooth, even, and its scrub resistance, color developing, glossiness and weathering resistance etc. are greatly improved.
Add photostabilizer and can keep the stable of coating, it is aging to prevent that coating from decomposing.Coating can cause autoxidation because of absorbing ultraviolet ray under dayligth effect, cause polymer degradation, makes the mechanical property of the waterproof layer that coating forms worsen.Photostabilizer can effectively absorb ultraviolet ray or have the ability of catching the radical that produces because of photoxidation; Can stop and cause waterproof layer aged free radical reaction; Suppress photoxidation, prevent that waterproof layer from receiving ultraviolet ray and destroying, and light stability of self and Heat stability is good.Photostabilizer is one or more in hindered amines, benzophenone or the benzotriazole category among the present invention.
The preparation method of water-based acrylic acid top-coat provided by the invention may further comprise the steps:
A) take by weighing deionized water, dispersion agent, color stuffing, pH regulator agent and thixotropic agent in proportion, mixing and stirring, rotating speed is 1200 commentaries on classics/min~1800 commentaries on classics/min, grinds then, preferably is ground to fineness≤40 μ m;
B) take by weighing water-borne acrylic resin, skimmer, base material wetting agent, sudden strain of a muscle corrosion inhibitor, film coalescence aid and last the going on foot in the mixture that obtains of photostabilizer adding in proportion and stir, rotating speed is 1000 commentaries on classics/min~1500 commentaries on classics/min;
C) with b) mixture that obtains carries out filtering and impurity removing;
D) pH that uses an amount of pH regulator agent to regulate mixture is 8~9, and the viscosity >=3.0Pas with proper amount of deionized water adjusting mixture makes finish paint;
Wherein the weight percent content of each composition is: water-borne acrylic resin 30%~65%, dispersion agent 0.5%~5%, skimmer 0.1%~5%; Base material wetting agent 0.1%~5%, color stuffing are 10%~30%, pH regulator agent 0.5%~10%; Thixotropic agent 0.5%~10% dodges corrosion inhibitor 1%~10%, film coalescence aid 0.5%~5%; Photostabilizer 1%~5%, deionized water 5%~20%.
Embodiment 1:
A) take by weighing Tego740W dispersion agent 5kg, carbon black 30kg, 800 order mica powder 80kg, the ultra-fine barium sulfate 100kg of deionized water 160kg, goldschmidt chemical corporation, the AMP-95pH regulator 12kg and the Degussa aerosil 8kg of Dow Chemical company; Mixing and stirring; Rotating speed is 1500 commentaries on classics/min, is ground to fineness≤40 μ m then;
B) Raybo 75 that takes by weighing KL245 base material wetting agent 3kg, the U.S. Rui Bao company of HD2535 water-borne acrylic resin 550kg, goldschmidt chemical corporation Tego825 skimmer 5kg, the goldschmidt chemical corporation of U.S. Hua Jinsi dodges to go on foot in the mixture that obtains in Tinuvin 5050 UV light absorber 20kg adding of film coalescence aid 12 carbon alcohol ester 15kg and Ciba company of corrosion inhibitor 10kg, Yi Shi Man and stirs, and rotating speed is 1200 commentaries on classics/min;
C) with b) mixture that obtains carries out filtering and impurity removing;
D) pH of adjusting mixture is 8.3, and the viscosity of using proper amount of deionized water to regulate mixture is 3.4Pas, makes finish paint.
Embodiment 2:
A) take by weighing BYK110 dispersion agent 20kg, carbon black 30kg, 800 order mica powder 50kg, silicon powder 80kg, pH regulator agent trolamine 30kg and the THIXCIN 70kg of deionized water 120kg, German Bi Ke chemical company; Mixing and stirring; Rotating speed is 1600 commentaries on classics/min, is ground to fineness≤40 μ m then;
B) take by weighing speed this hindered amine light stabilizer 944 that dodges film coalescence aid 20kg and the 30kg Shijiazhuang stone coking worker Ltd of corrosion inhibitor 40kg, Qingzhou shellfish specialization worker ltd of SNW 311 base material wetting agent 30kg, SER-AD FA379 sea name of trade Co., Ltd of water-borne acrylic resin 450kg, Guangzhou China HX-2013 of auxiliary agent chemical company skimmer 30kg, Lip river, Guangdong city that flower flies happy water-borne coatings ltd and add to go up in the mixture that the step obtains and stir, rotating speed is 1100 commentaries on classics/min;
C) with b) mixture that obtains carries out filtering and impurity removing;
D) pH of adjusting mixture is 8.7, and the viscosity of using proper amount of deionized water to regulate mixture is 3.5Pas, makes finish paint.
Embodiment 3:
A) take by weighing A11 ZX-I dipersant 10kg, carbon black 30kg, talcum powder 40kg, ultra-fine barium sulfate 80kg, the pH regulator agent N of the Synthron of deionized water 100kg, Guangzhou Ou Peng chemical industry ltd; The BK-923 thixotropic agent 20kg of N-dimethylethanolamine 40kg and Hangzhou lean chemical industry ltd; Mixing and stirring; Rotating speed is 1200 commentaries on classics/min, is ground to fineness≤40 μ m then;
B) take by weighing JF1000 water-borne acrylic resin 500kg, the modest 5300 polysiloxane defoamers 20kg of sea name Si De, the goldschmidt chemical corporation of Zibo Jia Feng chemical science and technology Development Co., Ltd KL245 base material wetting agent 20kg, SER-AD FA 179 sea names this dodge to go on foot in the mixture that obtains in GW-531 benzophoenone light stabiliziers 40kg addings of corrosion inhibitor 60kg, Li Ande DPNB film coalescence aid 40kg and Beijing addition auxiliary agent institute and stir, rotating speed is 1000 commentaries on classics/min;
C) with b) mixture that obtains carries out filtering and impurity removing;
D) pH of adjusting mixture is 8.7, and the viscosity of using proper amount of deionized water to regulate mixture is 3.4Pas, makes finish paint.
The water-based acrylic acid top-coat of embodiment 1-3 preparation is detected, and data are as shown in table 1:
Table 1 water-based acrylic acid top-coat salient features test result
Through detecting, can find that water-based acrylic acid top-coat of the present invention has excellent stability to aging and thermostability, ultraviolet resistance is aging can to reach 600h; Mechanical property, freeze-thaw stability are given prominence to, and compliance with environmental protection requirements, have practical value, are suitable for requirement and have long-acting stability to aging, the occasion that environmental requirement is high.
More than a kind of water-based acrylic acid top-coat provided by the present invention and preparation method thereof has been carried out detailed introduction.Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.

Claims (10)

1. a water-based acrylic acid top-coat is characterized in that, comprises following component in percentage by weight:
Water-borne acrylic resin 30%~65%
Dispersion agent 0.5%~5%
Skimmer 0.1%~5%
Base material wetting agent 0.1%~5%
Color stuffing 10%~30%
PH regulator agent 1%~10%
Thixotropic agent 1%~10%
Dodge corrosion inhibitor 1%~10%
Film coalescence aid 0.5%~5%
Photostabilizer 1%~5%
Deionized water 5%~20%,
Wherein, the copolymerization raw material of said water-borne acrylic resin comprises following component in percentage by weight: acrylate monomer 5%~15%, methacrylate monomers 30%~70% and epoxy-modified acrylic acid monomer 15%~40%; Said base material wetting agent is a polyether siloxane copolymer; In the verivate that said sudden strain of a muscle corrosion inhibitor is a benzisothiazole, phthalimide, Sodium Nitrite, tert-butylamine, alkyl imidazole and the sad amine one or more.
2. water-based acrylic acid top-coat according to claim 1 is characterized in that, said dispersion agent is one or more among poly carboxylic acid ammonium salt or the polycarboxylate sodium.
3. water-based acrylic acid top-coat according to claim 1 is characterized in that, said skimmer is a silicone antifoam agent.
4. water-based acrylic acid top-coat according to claim 1 is characterized in that, said color stuffing is one or more in white titanium pigment, talcum powder, carbon black, mica powder, ceramic or the silicon powder.
5. water-based acrylic acid top-coat according to claim 1 is characterized in that, said pH regulator agent is ammoniacal liquor, N, one or more in N-dimethylethanolamine, 2-amino-2-methyl-1-propanol or the trolamine.
6. water-based acrylic acid top-coat according to claim 1 is characterized in that, said thixotropic agent is one or more in aerosil, organobentonite, THIXCIN or the polyamide wax.
7. water-based acrylic acid top-coat according to claim 1 is characterized in that, said film coalescence aid is one or both in pure ether compound or the 12 carbon alcohol esters.
8. water-based acrylic acid top-coat according to claim 1 is characterized in that, said photostabilizer is one or more in hindered amines, benzophenone or the benzotriazole category.
9. the preparation method of a water-based acrylic acid top-coat is characterized in that, may further comprise the steps:
A) deionized water, dispersion agent, color stuffing, pH regulator agent and thixotropic agent are mixed stirring, grind;
B) with stirring in water-borne acrylic resin, skimmer, base material wetting agent, sudden strain of a muscle corrosion inhibitor, film coalescence aid and the photostabilizer adding mixture that upward step obtains;
C) with b) mixture that obtains carries out filtering and impurity removing;
D) pH of adjusting mixture is 8~9, viscosity >=3.0Pas;
The weight percent content of each composition is: water-borne acrylic resin 30%~65%, dispersion agent 0.5%~5%, skimmer 0.1%~5%; Base material wetting agent 0.1%~5%, color stuffing are 10%~30%, pH regulator agent 0.5%~10%; Thixotropic agent 0.5%~10% dodges corrosion inhibitor 1%~10%, film coalescence aid 0.5%~5%; Photostabilizer 1%~5%, deionized water 5%~20%
Wherein, the copolymerization raw material of said water-borne acrylic resin comprises following component in percentage by weight: acrylate monomer 5%~15%, methacrylate monomers 30%~70% and epoxy-modified acrylic acid monomer 15%~40%; Said base material wetting agent is a polyether siloxane copolymer; In the verivate that said sudden strain of a muscle corrosion inhibitor is a benzisothiazole, phthalimide, Sodium Nitrite, tert-butylamine, alkyl imidazole and the sad amine one or more.
10. preparation method according to claim 9 is characterized in that, saidly mixture is milled to fineness≤40 μ m in a).
CN201110039067A 2011-02-16 2011-02-16 Water-based acrylic finish paint and preparation method thereof CN102134427B (en)

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