CN110157271A - A kind of aqueous polymeric coating composition of automobile - Google Patents
A kind of aqueous polymeric coating composition of automobile Download PDFInfo
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- CN110157271A CN110157271A CN201910487650.6A CN201910487650A CN110157271A CN 110157271 A CN110157271 A CN 110157271A CN 201910487650 A CN201910487650 A CN 201910487650A CN 110157271 A CN110157271 A CN 110157271A
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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
- C09D133/00—Coating compositions based on homopolymers or 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 only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
-
- 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
- C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
- C09D161/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
-
- 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
- C09D167/00—Coating compositions based on polyesters obtained by reactions forming a carboxylic ester link in the main chain; Coating compositions based on derivatives of such polymers
- C09D167/06—Unsaturated polyesters having carbon-to-carbon unsaturation
-
- 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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
-
- 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
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- 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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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
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- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paints Or Removers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a kind of aqueous polymeric coating compositions of automobile, it comprises the following components in parts by weight: (a) 10~50 parts of water-based acrylic resin secondary breakup body, (b) 10~50 parts of the acrylic resin modified secondary breakup body of waterborne polyester, (c) 1~5 part of dispersing agent, (d) 5~22 parts of pigment, (e) 5~15 parts of amino resins, (f) 5~30 parts of solvent, (g) 1~10 part of auxiliary agent；(a), the weight summation of (b) accounts for the 50~100% of total weight.The aqueous polymeric coating composition of automobile of the invention, solve the problems, such as flow time is long, aqueous coating film gloss is low when aqueous film manufacture in the prior art, aqueous film be not easy it is smooth, successfully reduce flow time and prebake conditions time, the long shortwave of film is small, paint film is more smooth, suitable for the coating of car, have the advantages that coating film gloss is high, levelability is excellent, chemical resistance is good, the pin hole limit is high after film.
Description
Technical field
The invention belongs to technical field of coatings, specifically, more particularly to a kind of aqueous high-molecular coating combination of automobile
Object.
Background technique
With the development of industry, environmental pollution is increasingly severe, and PM2.5 is severely exceeded, and PM2.5 problem causes the public universal
Concern.It is influenced by extreme worst case meteorological conditions, long-time, a wide range of, heavily contaminated haze weather occurs in China Middle Eastern.It presses
According to new ambient air quality, 74, the whole nation emphasis monitoring city number of days up to standard that is averaged is only 37.6%.Environmental pollution is led
It causes ecology to degenerate, many disease incidents is caused to greatly increase.Wide important topic in paint industry is occupied very big in environmental pollution factors
Specific gravity, and car paint coating accounts for about the 20% of wide important topic in paint industry.
Existing painting dressing automobiles industry coat system mainly has: solvent type 3C2B system, solvent type 3C1B system, aqueous 3C2B
System, aqueous 3C1B system.It is as follows the characteristics of every kind of system above: solvent type 3C2B system: volatile organic compounds (VOC)
Height, solvent release is more, and environmental pollution is serious, and energy consumption is high；Solvent type 3C1B system: VOC high, solvent release is more, to environment dirt
Dye is serious, and low energy consumption；Aqueous 3C2B system: VOC is lower than solvent type 3C1B system, and energy consumption is high；Aqueous 3C1B system: VOC and water
Property 3C2B system it is suitable, energy consumption reduce.The horizontal highest of 3C2B system VOC emission in above-mentioned each coating system, aqueous 3C1B system
VOC emission level is minimum.
The VOC comparison of each painting design is as shown in table 1:
Table 1
Aqueous unimolecule film (coatings industry the 7th phase of volume 45), Jianghuai Automobile limited liability company Xing Wenping, Ge Fei's
One article " the aqueous single coating aluminum powder paint painting technique Discussion on Technology of automobile ", describes a kind of painting of aqueous single coating solid color enamel
Dress technique, the technique VOC emission is low, and appearance, performance can reach the requirement of Yangze river and Huai river truck, but there are flow times and prebake conditions
The problem of time is long, reduces productive temp.The long shortwave of the appearance of paint coatings paint film is larger, and improvement of visual effect is bad.
In view of this, it is necessary to provide a kind of coating film gloss height, levelability is excellent, the good automobile of chemical resistance is aqueous
High-molecular coating.
Summary of the invention
The object of the present invention is to provide a kind of aqueous polymeric coating compositions of automobile, after the coating composition film
Have the advantages that coating film gloss is high, levelability is excellent, chemical resistance is good, the pin hole limit is high.
It is a further object to provide a kind of preparation methods of aqueous polymeric coating composition of automobile.
To achieve the goals above, The technical solution adopted by the invention is as follows:
The present invention provides a kind of aqueous polymeric coating compositions of automobile, comprise the following components in parts by weight:
(a) 10~50 parts of water-based acrylic resin secondary breakup body,
(b) 10~50 parts of the acrylic resin modified secondary breakup body of waterborne polyester；
(c) 1~5 part of dispersing agent,
(d) 5~22 parts of pigment,
(e) 5~15 parts of amino resins,
(f) 5~30 parts of solvent,
(g) 1~10 part of coating additive；
Wherein, the component (a), (b) weight summation account for the aqueous polymeric coating composition total weight of the automobile
50~100%.
Preferably, selected from BAYHYDROL A 2470, (Cohan initiative, is not waved the water-based acrylic resin secondary breakup body
Send out part 45%), BAYHYDROL A 2470, Uacryl 2145H (connection solidification length of schooling, non-volatile part 42%), VIACRYL VSC
At least one of 6276w/44WA (profound brand-new, non-volatile part 44%, water soluble acrylic acid secondary breakup body)；
The acrylic resin modified secondary breakup body of waterborne polyester is selected from and VIACRYL VSC 6800w/47WA is (profound new
System, non-volatile part 47%, waterborne polyester modified acroleic acid secondary breakup body), the aqueous acrylic modified saturated polyester of YG-SD842
Resin (manufacture of Beijing sunlight Hui De Environmental Protection Technology Co., Ltd, non-volatile part 47%, water dispersible secondary breakup body), YG-
The aqueous saturated polyester resin of SP881, (manufacture of Beijing sunlight Hui De Environmental Protection Technology Co., Ltd, non-volatile part 81%, propylene glycol first
At least one of ethereal solution)；
Preferably, the number-average molecular weight of the water-based acrylic resin secondary breakup body is 45000~85000；The water
Property polyester modified acrylic resin secondary breakup body amount of polyester between 5-50%, number-average molecular weight be 60000~
100000；The water-based acrylic resin secondary breakup body and the acrylic resin modified secondary breakup body collocation of the waterborne polyester
Using the performances such as levelability and gloss can be significantly improved.It is preferential to select VIACRYL VSC 6276w/44WA/VIACRYL VSC
6800w/47WA/YG-SD842 is used in mixed way, it is desirable that grafting rate meets requirement of the invention.The waterborne polyester modified acroleic acid
Resin secondary breakup body is 8-15% lower than the modification grafting rate of the water-based acrylic resin secondary breakup body, is modified grafting rate
Absolute value.During the waterborne polyester is acrylic resin modified containing 15% styrene, 200~2400mpas of viscosity, pH value
8.0~9.1, non-volatile content 42.5~45.5%, hydroxyl value 85,1.04 [g/cm of density3], which can assign film bloom
Pool.
Preferably, the weight summation of component (a)~(f) accounts for the 70~100% of the coating composition total weight；Its
Middle surplus can be the component added when in use, such as the pigment of this field, filler or combinations thereof (such as R-2196, CR-
97, the combination of BLACK PEARL 280 or R-2196/BLACK PEARL 280, CR-97/BLACK PEARL 280).
Preferably, the dispersing agent is the non-ionic dispersing agent of water paint, commercially available to be commercially available, such as
BYK 190 (German Byk Chemie GmbH), SOLSPERSE 27000 (Lu Borun special type chemical industry (Shanghai) Co., Ltd.),
WV400 (Lu Borun special type chemical industry (Shanghai) Co., Ltd.).Non-ionic dispersing agent selected by the present invention does not generate in water
Anion or cation and resin anion (R.A.) and resin cation will not all generate reaction, can improve the stability of water paint.
And non-ionic dispersing agent will not generate positive charge or negative electrical charge in water, the influence to water-based emulsion or aqueous secondary breakup body
It acts on small, the charge structure of lotion or secondary breakup body will not be destroyed, it helps improve the stability of water paint.
It is highly preferred that the parts by weight of the dispersing agent are 2~4 parts.
Preferably, the pigment is at least one of titanium dioxide, carbon black, and the dosage of the pigment is not specifically limited,
As long as not generating limitation to goal of the invention of the invention, such as account for the aqueous polymeric coating composition gross weight of the automobile
5~18%, more specifically such as the 5~15% of amount.More specifically, titanium dioxide can select R-2196, (group, China, Du Pont has
Limit company, rutile-type), CR-97 (Ishihara Sangyo Kaisha, Ltd., rutile-type), such as the aqueous height of the automobile can be accounted for
The 4~18% of molecule coating composition total weight.More specifically, carbon black can select BLACK PEARL 280, C311 etc. (green
Island Degussa Chemical Co., Ltd.), such as the 1~4% of the aqueous polymeric coating composition of the automobile can be accounted for.
Preferably, the amino resins is used as the crosslinking of the aqueous polymeric coating composition of the automobile in the present invention
At least one of agent, including full Amino resin, complex etherified amino resins, butylated amino resin.The amino
Resin selects Luwipal 069 (BASF AG's manufacture, Amino resin), (the BASF AG's system of luwipal 072
Make, Amino resin), cymel 327 (profound new company manufacture, Amino resin), cymel 285-100 it is (profound new
At least one of company's manufacture, butylated amino resin).It is highly preferred that the weight of the amino resins is the automobile
The 9~11% of aqueous high molecular coating composition total weight.
Preferably, the solvent is at least one of alcohol ethers solvent, alcohol solvent of ether ester type；It is furthermore preferred that the alcohol
Ether solvent, alcohol solvent of ether ester type are that solubility is greater than 20 or more in water, and boiling point is more than 150 boilings, and preferably 150 preferably in solvent
For solvent, specifically select butyl glycol ether, butyl, ethylene glycol ethyl ether, diethylene glycol ether, ethylene glycol ethyl ether vinegar
At least one of acid esters, the alcohol ethers solvent and alcohol solvent of ether ester type can improve the levelling, gloss, anti-pin hole of film
Property.
Preferably, the coating additive includes the wetting aid and levelling agent of 0.1~1 parts by weight, 3~5 parts by weight at
Other acceptable coating additives on film auxiliary agent and the polymer science of surplus.
The wetting aid can choose commercially available TEGO 280, DYNOL 980, BYK346, in BYK346 etc. at least
It is a kind of.
The levelling agent can choose commercially available BYK-381, TEGO GLIDE 100 etc., can choose one kind, can also be with
Select two or more to be used in mixed way.Both the mixed proportion of the dispersing agent and levelling agent is not specifically limited, i.e., can be with
Arbitrary proportion mutually mixes, as long as not generating limitation to goal of the invention of the invention.
The coalescing agent can choose isomerous tridecanol, ethylene glycol ether acetate, in diethylene glycol ether acetate
At least one.Preferably, for the dosage of the coalescing agent between 1~5 parts by weight, optimum amount is 3~5 parts by weight.
Other acceptable coating additives include ground wetting agent, cosolvent, amine neutralizer, thixotroping on the polymer science
Agent or combinations thereof.The present invention can also use other coating additives, as long as not generating limitation to goal of the invention of the invention,
Such as defoaming agent BYK 011, FS 204DPM, 850 TEGO, light aging auxiliary agent include TINUVIN 292 etc..
The ground wetting agent is the surfactant with defoaming function, and there is the surface tension of strength to reduce effect for split
When the ground wetting agent of fruit, available better coating surface tension, and a large amount of bubble will not be generated so that producing
More undesirable appearance phenomenon is generated in the use process of product.The defoaming type ground wetting agent can be living using defoaming type surface
Property agent.What this defoaming type surfactant was known to those skilled in the art.The reduction surface tension type ground profit
Humectant can be using the surfactant for reducing surface tension.The surfactant of the reduction surface tension is for art technology
Personnel are known.
The cosolvent is water dispersible cosolvent.The water dispersible cosolvent includes n-amyl alcohol, n-hexyl alcohol, positive heptan
The alcohols solvents such as alcohol, cyclohexanol, n-octyl alcohol；The glycol ethers solvents such as ethylene glycol mono hexyl ether, ethylene glycol single 2-ethyl hexyl ether；
The propylene glycol ether solvents such as propylene glycol n-butyl ether, dipropylene glycol n-butyl ether, tripropylene glycol n-butyl ether.The above various solvents
It can be used alone or two or more be used in mixed way.
The preferred boiling point of amine neutralizer is at 150 DEG C or less.It can choose boiling point having lower than 150 DEG C as amine neutralizer
Machine amine.Such as the organic amines such as diethanol amine, triethylamine, 1,4- morpholine, dimethylethanolamine, monomethyl-ethanolamine
Class.
Due to the adoption of the above technical scheme, the present invention has the following advantages and beneficial effects:
The aqueous polymeric coating composition of automobile of the invention, levelling when solving aqueous film manufacture in the prior art
Time is long, aqueous coating film gloss is low, aqueous film is not easy smooth problem, successfully reduces flow time and prebake conditions time,
Provide that a kind of levelling, preliminary drying time is short, gloss is high, the aqueous unimolecule film of flat appearance, automobile through the invention
The long shortwave of film of aqueous high molecular coating composition spraying is small, and paint film is more smooth, is applicable to the coating of car, is sent out with this
With coating film gloss is high, levelability is excellent, chemical resistance is good, needle after the aqueous polymeric coating composition film of bright automobile
The high advantage of the hole limit.
In the prior art aqueous film due in composition solvent content it is seldom, be not easy levelling after spraying, be easy to produce
Pinprick needs longer flow time to improve the planarization of film.The present invention is by selecting high-molecular block copolymer class oversubscription
Powder (such as SOLSPERSE 27000) Lai Tigao coating construction solid part reduces the content of water in film, reduces coating composition
Viscosity when spraying, and then reach and shorten levelling preliminary drying time, the effect of levelling is improved, meanwhile, formula matrix resin selects water
Property acrylic resin secondary breakup body spell use good fluidity the acrylic resin modified secondary breakup body of waterborne polyester, improve film
Levelability in baking process.
Solvent type resin exists in the prior art with molecular state, and molecule is easy stretching, extension after spraying, is easy to get high glaze
Film.Exist after resin Water-borne modification with molecule state, solvent content is very low in composition, and molecular resin is not easy after spraying
Stretching, extension, there are microcosmic coarse for film coated surface, it is difficult to obtain the film of high glaze.The present invention is by selecting the aqueous of good fluidity
Polyester modified acrylic resin secondary breakup body improves the gloss of film, improves levelability on the basis of guaranteeing performance and gloss.
The gloss of film is improved by high photopolymer resin.The high photopolymer resin is polyacrylic resin, in resin containing 15% styrene, glue
Spend 200~2400mpas, pH value 8.0~9.1, non-volatile content 42.5~45.5%, hydroxyl value 85,1.04 [g/cm of density3], the tree
Rouge can assign film high glaze.
Solvent type resin exists in the prior art with molecular state, and molecule is easy stretching, extension after spraying, and it is flat to be easy to get appearance
Whole film.Exist after resin Water-borne modification with molecule state, solvent content is very low in composition, and molecular resin flows after spraying
Property it is poor, resin be not easy stretch levelling, it is difficult to obtain the film of flat appearance.The aqueous high-molecular coating group of automobile of the invention
It closes and wetting dispersing agent raising film wetability on base material is added in object, and then improve the levelability of film；Selected by the present invention
The wetting dispersing agent (such as DYNOL 980) of twin structure, can promote film quick humidification on substrate, it is not easy to generate gas
Bubble, can significantly improve film appearance and anti-pin hole.
Specific embodiment
In order to illustrate more clearly of the present invention, below with reference to preferred embodiment, the present invention is described further.Ability
Field technique personnel should be appreciated that following specifically described content is illustrative and be not restrictive, this should not be limited with this
The protection scope of invention.
Please refer to the component and formula table of the embodiment of the present invention 1~5 and comparative example 1~4 shown in table 2.
Embodiment 1
Raw materials and consumption selected by the aqueous polymeric coating composition of automobile is as shown in table 2:
Table 2
The aqueous polymeric coating composition preparation method of the automobile of the present embodiment is the following steps are included: by component
VIACRYL VSC 6800w/47WA, YG-SD842, butyl, pure water, RHODOLINE 3100, FS-204 DPM according to
It in one suitable vessel of secondary addition, stirs 30 minutes, is then slowly added into CR-97, BYK-011, stir 30 minutes, it will with sand mill
The above-mentioned material mixed is ground to fineness less than 5um, and filtering calculates yield, is successively slowly added to Luwipal according to yield
069, CYMEL 285, TEGO Wet 280, DYNOL 980,10% solution of DMEA stir obtain within 30 minutes it is described in embodiment 1
The aqueous polymeric coating composition of automobile.
The aqueous polymeric coating composition of automobile prepared using embodiment 1 carries out film, and film preparation method uses
The mode that robot sprays automatically prepares paint film, and spraying equipment is automatic spraying machine LACTECH.
Spraying process is as follows: Control During Paint Spraying by Robot → 24 techniques such as 5~8min of levelling → 808 toasts 5~8min → 140m and dries
Roasting 30min.
Spray room condition: temperature 24, humidity: 65 degree:.
Film Preparation equipment parameter is as shown in table 3:
Table 3
| Atomizer model | SAMES707 such as table sprays |
| Outstanding cup revolving speed (rpm) | 50000 |
| Rifle is away from (mm) | 250 |
| Rifle speed (m/s) | 0.5 |
| Shape air (mL/min) | 600 |
| It is spaced (mm) | 70 |
| Flow (mL/min) | 260 |
| Voltage (kv) | 70 |
The aqueous polymeric coating composition of automobile and 1~4 products obtained therefrom of comparative example prepared using embodiment 1 is applied
The appearance testing result of film, gained coating is as shown in table 4:
Table 4
As can be seen from Table 4, after the aqueous polymeric coating composition film of automobile of embodiment 1-5 preparation, comparison
Example 1 does not use VIACRYL VSC 6800w/47WA, and compared with embodiment 1-5, the obscure degree of du rises, and CF value reduces；Comparative example 2
VIACRYL VSC 6800w/47WA and VIACRYL VSC 6276/44WA, compared with embodiment 1-5, the obscure degree of du are not used
Rise, CF value reduces；Comparative example 3 does not use VIACRYL VSC 6276/44WA, wetting dispersing agent DYNOL 980, with embodiment
1-5 is compared, and the obscure degree of du rises, and CF value reduces；Comparative example 4 does not use VIACRYL VSC 6276/44WA, dispersing agent
SOLSPERSE 27000, compared with embodiment 1-5, the obscure degree of du rises, and CF value reduces.
The aqueous polymeric coating composition of automobile and 1~4 products obtained therefrom of comparative example prepared using embodiment 1 is applied
The performance test results of film, gained coating are as shown in table 5:
Table 5
As can be seen from Table 5, after the aqueous polymeric coating composition film of automobile of embodiment 1-5 preparation, comparison
Example 1 does not use VIACRYL VSC 6800w/47WA, and compared with Example 1, hardness reduces, not acidproof；Comparative example 2 does not use
VIACRYL VSC 6800w/47WA and VIACRYL VSC 6276/44WA, compared with embodiment 1-5, hardness is reduced, pin hole pole
Limit reduces；Comparative example 3 does not use VIACRYL VSC 6276/44WA, wetting dispersing agent DYNOL 980, with embodiment 1/3/4/5
It compares, pin hole limit relative reduction；Comparative example 4 does not use VIACRYL VSC 6276/44WA, dispersing agent SOLSPERSE
27000, compared with embodiment 1/3/5, the pin hole limit is reduced.
Embodiment 2
The aqueous polymeric coating composition of the automobile of the present embodiment comprises the following components in parts by weight: 50 parts of VIACRYL
VSC 6276w/44WA, 10 parts of VIACRYL VSC 6800w/47WA, 4 parts of Luwipal 069 (full methyl-etherified), 1 part of CYMEL
285 (complex etherified), 1 part of 10% solution of DMEA, 5 parts of CR-97,20 parts of butyls, 5 parts of water, 2 parts of SOLSPERSE
27000,0.1 parts of 280,0.1 part of TEGO Wet, 980,1 part of DYNOL FS-204 DPM, 0.8 part of BYK-011.
The preparation method is the same as that of Example 1.
Embodiment 3
The aqueous polymeric coating composition of the automobile of the present embodiment comprises the following components in parts by weight: 10 parts of VIACRYL
VSC 6276w/44WA, 50 parts of VIACRYL VSC 6800w/47WA, 8 parts of Luwipal 069 (full methyl-etherified), 2 parts of CYMEL
285 (complex etherified), 5 parts of 10% solution of DMEA, 15 parts of CR-97,5 parts of butyls, 1 part of water, 3 parts of SOLSPERSE
27000,0.2 parts of 280,0.2 part of TEGO Wet, 980,0.3 part of DYNOL FS-204 DPM, 0.3 part of BYK-011.
The preparation method is the same as that of Example 1.
Embodiment 4
The aqueous polymeric coating composition of the automobile of the present embodiment comprises the following components in parts by weight: 20 parts of VIACRYL
VSC 6276w/44WA, 40 parts of VIACRYL VSC 6800w/47WA, 12 parts of Luwipal 069 (full methyl-etherified), 3 parts of CYMEL
285 (complex etherified), 3 parts of 10% solution of DMEA, 10 parts of CR-97,7 parts of butyls, 3 parts of water, 1 part of SOLSPEERSE
27000,0.1 parts of 280,0.1 part of TEGO Wet, 980,0.4 part of DYNOL FS-204DPM, 0.4 part of BYK-011.
The preparation method is the same as that of Example 1.
Embodiment 5
The aqueous polymeric coating composition of the automobile of the present embodiment comprises the following components in parts by weight: 40 parts of VIACRYL
VSC 6276w/44WA, 20 parts of VIACRYL VSC 6800w/47WA, 6 parts of Luwipal 069 (full methyl-etherified), 1 part of CYMEL
285 (complex etherified), 4 parts of 10% solution of DMEA, 12 parts of CR-97,10 parts of butyls, 4 parts of water, 1.5 parts
27000,0.5 part of SOLSPERSE, 280,0.6 part of TEGO Wet DYNOL 980,0.4 part of FS-204DPM, 0.4 part of BYK-011.
The preparation method is the same as that of Example 1.
The preparation method is the same as that of Example 1 for comparative example 1~4.
The aqueous polymeric coating composition of automobile of the invention reduces film by high-molecular block copolymer dispersing agent
Composition viscosity improves coating composition construction solid part, and then reaches and shorten levelling preliminary drying time, improves the effect of levelling；
By polyester acrylic modified polyester resin, levelability is improved on the basis of guaranteeing performance and gloss；Pass through the super of twin structure
Wetting agent improves the performance of coating composition quick humidification, improves the levelability and anti-pin hole of film.
The aqueous polymeric coating composition of automobile of the invention, levelling when solving aqueous film manufacture in the prior art
Time is long, aqueous coating film gloss is low, aqueous film is not easy smooth problem, successfully reduces flow time and prebake conditions time,
Provide that a kind of levelling, preliminary drying time is short, gloss is high, the aqueous unimolecule film of flat appearance, automobile through the invention
The long shortwave of film of aqueous high molecular coating composition spraying is small, and paint film is more smooth, is applicable to the coating of car, is sent out with this
With coating film gloss is high, levelability is excellent, chemical resistance is good, needle after the aqueous polymeric coating composition film of bright automobile
The high advantage of the hole limit.
In the prior art aqueous film due in composition solvent content it is seldom, be not easy levelling after spraying, be easy to produce
Pinprick needs longer flow time to improve the planarization of film.The present invention is by selecting high-molecular block copolymer class oversubscription
Powder (such as SOLSPERSE 27000) Lai Tigao coating construction solid part reduces the content of water in film, reduces coating composition
Viscosity when spraying, and then reach and shorten levelling preliminary drying time, the effect of levelling is improved, meanwhile, formula matrix resin selects water
Property acrylic resin secondary breakup body spell use good fluidity the acrylic resin modified secondary breakup body of waterborne polyester, improve film
Levelability in baking process.
Solvent type resin exists in the prior art with molecular state, and molecule is easy stretching, extension after spraying, is easy to get high glaze
Film.Exist after resin Water-borne modification with molecule state, solvent content is very low in composition, and molecular resin is not easy after spraying
Stretching, extension, there are microcosmic coarse for film coated surface, it is difficult to obtain the film of high glaze.The present invention is by selecting the aqueous of good fluidity
Polyester modified acrylic resin secondary breakup body improves the gloss of film, improves levelability on the basis of guaranteeing performance and gloss.
The gloss of film is improved by high photopolymer resin.The high photopolymer resin is polyacrylic resin, in resin containing 15% styrene, glue
Spend 200~2400mpas, pH value 8.0~9.1, non-volatile content 42.5~45.5%, hydroxyl value 85,1.04 [g/cm of density3], the tree
Rouge can assign film high glaze.
Solvent type resin exists in the prior art with molecular state, and molecule is easy stretching, extension after spraying, and it is flat to be easy to get appearance
Whole film.Exist after resin Water-borne modification with molecule state, solvent content is very low in composition, and molecular resin flows after spraying
Property it is poor, resin be not easy stretch levelling, it is difficult to obtain the film of flat appearance.The aqueous high-molecular coating group of automobile of the invention
It closes and wetting dispersing agent raising film wetability on base material is added in object, and then improve the levelability of film；Selected by the present invention
The wetting dispersing agent (such as DYNOL 980) of twin structure, can promote film quick humidification on substrate, it is not easy to generate gas
Bubble, can significantly improve film appearance and anti-pin hole.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention may be used also on the basis of the above description for those of ordinary skill in the art
To make other variations or changes in different ways, all embodiments can not be exhaustive here, it is all to belong to this hair
The obvious changes or variations that bright technical solution is extended out are still in the scope of protection of the present invention.
Claims (10)
1. a kind of aqueous polymeric coating composition of automobile, it is characterised in that: comprise the following components in parts by weight:
(a) 10~50 parts of water-based acrylic resin secondary breakup body,
(b) 10~50 parts of the acrylic resin modified secondary breakup body of waterborne polyester,
(c) 1~5 part of dispersing agent,
(d) 5~22 parts of pigment,
(e) 5~15 parts of amino resins,
(f) 5~30 parts of solvent,
(g) 1~10 part of coating additive；
Wherein, the component (a), (b) weight summation account for the 50 of the aqueous polymeric coating composition total weight of the automobile
~100%.
2. the aqueous polymeric coating composition of automobile according to claim 1, it is characterised in that: the water soluble acrylic acid
The number-average molecular weight of resin secondary breakup body is 45000~85000, is selected from BAYHYDROL A 2470, BAYHYDROL A
2470, at least one of Uacryl 2145H, VIACRYL VSC 6276w/44WA；
The acrylic resin modified secondary breakup body number-average molecular weight of waterborne polyester is 60000~100000, is selected from VIACRYL
VSC 6800w/47WA, YG-SD842, YG-SP881, at least one of；
The amount of polyester of the acrylic resin modified secondary breakup body of waterborne polyester contains 15% between 5-50% in resin
Styrene, viscosity is 200~2400mPa.s, and pH value is 8.0~9.1, and non-volatile part is 42.5~45.5%, and hydroxyl value is
85mgKOH/g, density 1.04g/cm3；
Modification of the acrylic resin modified secondary breakup body of waterborne polyester than the water-based acrylic resin secondary breakup body
The low 8-15% of grafting rate.
3. the aqueous polymeric coating composition of automobile according to claim 1 or 2, it is characterised in that: the component (a)
The weight summation of~(f) accounts for the 70~100% of the aqueous polymeric coating composition total weight of the automobile.
4. the aqueous polymeric coating composition of automobile according to claim 3, it is characterised in that: the dispersing agent is water
Property coating non-ionic dispersing agent, be selected from least one of BYK 190, SOLSPERSE 27000, WV400.
5. the aqueous polymeric coating composition of automobile according to claim 4, it is characterised in that: the weight of the dispersing agent
Measuring part is 2~4 parts.
6. the aqueous polymeric coating composition of automobile according to claim 5, it is characterised in that: the pigment is titanium white
At least one of powder, carbon black, the weight of the pigment account for the aqueous polymeric coating composition total weight of the automobile 5~
22%.
7. the aqueous polymeric coating composition of automobile according to claim 6, it is characterised in that: the titanium dioxide is R-
2196, at least one of CR-97；
The carbon black is at least one of BLACK PEARL 280, C311；The carbon black accounts for the automobile aqueous high molecular
The 1~3% of the total weight of coating composition.
8. the aqueous polymeric coating composition of automobile according to claim 7, it is characterised in that: the amino resins is
At least one of full Amino resin, complex etherified amino resins, butylated amino resin；The amino resins accounts for institute
State the 9~11% of the aqueous polymeric coating composition total weight of automobile.
9. the aqueous polymeric coating composition of automobile according to claim 3, it is characterised in that: the solvent is alcohol ether
At least one of class solvent, alcohol solvent of ether ester type, including butyl glycol ether, butyl, ethylene glycol ethyl ether, diethyl two
At least one of alcohol ether, ethylene glycol ether acetate；The alcohol ethers solvent, alcohol solvent of ether ester type are that solubility is big in water
In 20 or more, solvent of the boiling point at 150 DEG C~200 DEG C.
10. the aqueous polymeric coating composition of automobile according to claim 9, it is characterised in that: the coating additive
In wetting aid and levelling agent, the coalescing agent of 3~5 parts by weight and the polymer science of surplus including 0.1~1 parts by weight
Other acceptable coating additives；
On the polymer science other acceptable coating additives include amine neutralizer, defoaming agent, in light aging auxiliary agent at least
It is a kind of；
The coalescing agent is isomerous tridecanol, ethylene glycol ether acetate, at least one of diethylene glycol ether acetate；
Parts by weight are 3~5 parts.
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