CN109233611A - A kind of aqueous polyurethane dull finishing coat and preparation method thereof - Google Patents
A kind of aqueous polyurethane dull finishing coat and preparation method thereof Download PDFInfo
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- CN109233611A CN109233611A CN201810738209.6A CN201810738209A CN109233611A CN 109233611 A CN109233611 A CN 109233611A CN 201810738209 A CN201810738209 A CN 201810738209A CN 109233611 A CN109233611 A CN 109233611A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/671—Unsaturated compounds having only one group containing active hydrogen
- C08G18/672—Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
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- 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
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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
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/61—Additives non-macromolecular inorganic
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
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Abstract
The invention discloses a kind of aqueous polyurethane dull finishing coats and preparation method thereof, the aqueous polyurethane dull finishing coat includes the raw material components of following parts by weight: 35-45 parts of water-based hydroxyl acrylic emulsion, 5-15 parts of curing agent, environmentally friendly cosolvent 5-10 parts, 0.1-0.5 parts of neutralizer, 0.1-0.5 parts of defoaming agent, 1-5 parts of dispersing agent, 25-35 parts of pigments and fillers, 0.5-1 parts of substrate wetting agents, 1-5 parts of thickener, 0.5-1 parts of anti-settling agent, 0.5-2.5 parts and deionized water 10-20 parts of organic quenching powder.Aqueous polyurethane dull finishing coat provided by the invention, it can reach the performance requirement of same system bloom paint film, and water resistance, resistance to acid and alkali, resistance to ag(e)ing and wear-resisting property are excellent, VOC content is low, safety and environmental protection, practical value with higher, suitable for low gloss in need metal surface, have broad prospect of application and development potentiality.
Description
Technical field
The present invention relates to technical field of coatings more particularly to a kind of aqueous polyurethane dull finishing coat and preparation method thereof.
Background technique
Traditional solvent-type double-component polyurethane coating have film-forming temperature is low, adhesive force is strong, wearability is good, hardness greatly with
And the advantages that chemicals-resistant, good weatherability, it is widely used as industrial protection, wood furniture and car paint.But with environmental protection policy
Continuous implementation with it is perfect, continuous enhancing and the promotion of the environmental consciousness of consumer, the use of solvent based coating receives preceding institute
The limitation not having, traditional oil paint are gradually replaced by environmental protection coating material, wherein applying by the environmental protection of representative of water paint
Material is exactly the booming important component of Modern Green coating.Water paint by low VOC, energy conservation, it is nontoxic, environmentally friendly with the characteristics of quilt
The majority of consumers masses are approved, but the superior function of traditional coating is still not achieved in the performance of part water paint, aqueous
The development of coating is largely restricted, therefore is improved the product category of water paint, improved the property of water paint product
It can be the Main way of water paint development from now on.
Currently, mainly there are three approach for the aqueous polyurethane finishing coat of preparation semi-gloss, dumb light, first is that directly being carried out with flatting silica
Delustring, second is that delustring is carried out with filler (such as talcum powder) cooperation flatting silica, third is that lotion or low isocyanide acid value using low hydroxyl value
Curing agent cooperation flatting silica carry out delustring, but these three preparation methods can all make after carrying out delustring paint film property significantly under
Drop, system viscosity becomes larger after flatting silica is added, and the serious compactness for destroying paint film causes paint film gap to be increased, makes substrate surface
Increase with air contact rate, is unfavorable for storing, constructional difficulties.How the aqueous polyurethane dull finishing coat one that has excellent performance is developed
It is directly the insoluble technical problem in water paint field.
Summary of the invention
After aqueous polyurethane finishing coat delustring in the prior art aiming at the problem that paint film property sharp fall, the present invention is provided
A kind of aqueous polyurethane dull finishing coat and preparation method thereof.
In order to solve the above technical problems, present invention provide the technical scheme that
A kind of aqueous polyurethane dull finishing coat, the aqueous polyurethane dull finishing coat include the component of following parts by weight:
35-45 parts of water-based hydroxyl acrylic emulsion, 5-15 parts of curing agent, environmentally friendly cosolvent 5-10 parts, 0.1-0.5 parts of neutralizer, defoaming
0.1-0.5 parts of agent, 1-5 parts of dispersing agent, 25-35 parts of pigments and fillers, 0.5-1 parts of substrate wetting agents, 1-5 parts of thickener, anti-settling agent
0.5-1 parts, 0.5-2.5 parts and deionized water 10-20 parts of organic quenching powder.
Preferably, the aqueous polyurethane dull finishing coat includes the component of following parts by weight: water-based hydroxyl propylene yogurt
32-43 parts of liquid, 6-13 parts of curing agent, environmentally friendly cosolvent 6-9 parts, 0.2-0.4 parts of neutralizer, 0.2-0.4 parts of defoaming agent, dispersing agent
2-4 parts, 26-33 parts of pigments and fillers, 0.6-0.9 parts of substrate wetting agents, 2-4 parts of thickener, 0.6-0.9 parts of anti-settling agent, organic quenching
0.8-2.3 parts and deionized water 12-19 parts of powder.
It is furthermore preferred that the aqueous polyurethane dull finishing coat includes the component of following parts by weight: water-based hydroxyl acrylic acid
43 parts of lotion, 12 parts of curing agent, 6 parts of environmentally friendly cosolvent, 0.3 part of neutralizer, 0.3 part of defoaming agent, 3 parts of dispersing agent, pigments and fillers 30
Part, 0.6 part of substrate wetting agents, 3 parts of thickener, 0.7 part of anti-settling agent, 2 parts and 15 parts of deionized water of organic quenching powder.
Compared with the existing technology, the organic quenching powder that aqueous polyurethane dull finishing coat provided by the invention is selected was forming a film
Cheng Zhongke is crosslinked with water-based hydroxyl acrylic emulsion, is generated and is disappeared promoting paint film contraction to be gathered into the surface of uniform bumps
Also hardness, adhesive force and the attrition resistance of paint film are strengthened while light, and more inorganic flatting silica has more soft sense of touch, this
The ideal surface touch effect of kind can compare favourably with wax modified surface, and have no adverse effect to recoatability；Water-based hydroxyl third
Olefin(e) acid lotion and the low one third of isocyanate curing agent amount ratio market similar product dosage are guaranteeing paint film excellent properties
Under the premise of, the cost for not only reducing product also enhances the feature of environmental protection of product；Environmentally friendly cosolvent is cooperated to make the aqueous poly- of preparation
Urethane finishing coat VOC≤30g/L.Comprehensive function between coating each component provided by the present invention significantly improves the hardness, attached of coating
Put forth effort, corrosion resistance and wear-resisting property, also has many advantages, such as that VOC content is low, rate of drying is fast, easy for construction.System of the present invention
Standby aqueous polyurethane dull finishing coat be suitable for institute low gloss in need metal surface, have broad prospect of application and development dive
Power.
Preferably, the curing agent is aliphatic polymeric isocyanate.
Isocyanate curing agent is good with Miscibility ,-the NCO in isocyanate curing agent and water-based hydroxyl polyacrylic acid
- OH crosslinking in dispersion, can be improved the compactness and water resistance of paint film.The Desmodur of preferred Bayer Bitterfeld GmbH in embodiment
N3390, Desmodur N3390 are the low viscosity aliphatic polymeric isocyanate tree for being based on hexamethylene diisocyanate (HDI)
Rouge, it is good with Miscibility, it is easy stirring, is added so that the coating of preparation has good gloss and compactness.
Preferably, the environmentally friendly cosolvent is one or both of propandiol butyl ether, propylene glycol monomethyl ether.
Preferred cosolvent volatile quantity is small, has extremely strong dissolving power, nontoxic low taste, having improves levelling, adjusts paint film
The characteristics of rate of drying.
Preferably, the neutralizer is dimethylethanolamine.
Dimethylethanolamine not only has the effect of adjusting pH value, and is organic substance in itself, has certain auxiliary
The characteristic of film forming.
Preferably, defoaming agent described in the defoaming agent is that phosphoric acid lipid hydrophobicity defoams foam inhibitor and organic silicon defoaming agent
Mixture.
It is furthermore preferred that the mass ratio of the phosphoric acid lipid hydrophobicity defoaming foam inhibitor and the organic silicon defoaming agent is 1:
0.8~1.2.
Phosphoric acid lipid hydrophobicity defoaming foam inhibitor and the organic silicon defoaming agent are used in mixed way, and can obtain lasting disappear
Foam inhibition effect is steeped, and is free from side effects to paint film appearance and uniformity, flake, volcanic crater etc. will not be caused to have shadow to paint film appearance
Loud phenomenon.
Preferably, the dispersing agent is the high molecular weight block copolymer solution of the affinity groups containing pigment.
High molecular weight block copolymer dispersing agent can make pigment solution flocculate by steric hindrance, the granules of pigments after solution flocculation
Seldom, thus the glossiness and intensity of paint film can be enhanced.
Preferably, pigments and fillers are the mixture of carbon black, titanium dioxide and ultra-fine barium sulfate.
It is furthermore preferred that 10-15 parts of titanium dioxide, remaining is ultra-fine barium sulfate carbon black 0.1-0.5 parts in the pigments and fillers.
Ultra-fine barium sulfate product is that high-grade cawk is selected to produce through technology leading in the world now.Product is to cause
Close particle, particle size distribution range is narrow, and chemical stability is high, and barium sulfate content has high whiteness, without stain, nothing up to 98% or more
Impurity, dispersibility are good, good with matrix compatibility, are tightly combined, and have good wetability, outstanding acidproof, high temperature resistant,
Corrosion resistance can be obviously improved the hardness and wear-resisting property of product, also have the function of stablizing carbon black and titanium white powder pigment.
Preferably, the substrate wetting agents are polyether siloxane copolymer.
Polyether siloxane copolymer has the advantages that two kinds of substances of ethers and organic silicon, soaks with excellent ground
Property, excellent flowing promotion property, high-compatibility, and have and improve scratch resistance capability, shrinkage cavity and pigment loose colour can be prevented.
Preferably, the thickener is the swollen association thickener of alkali soluble.
Alkali soluble is swollen, and association thickener has certain surfactant properties, the cross-linked network that thickener macromolecular is formed
It is disengaged under structure high-rate of shear, reduces viscosity, shearing removes post-crosslinking structure and formed again, restores viscosity, but again
New association needs the time, so the recovery of viscosity is fast unlike cellulose family, is conducive to levelling, is conducive to the raising of gloss,
Simultaneously under normal circumstances, it be contracting together, meet alkali swelling and come, be used in compounding with anti-settling agent in the present invention, significantly
Improve the storage stability of coating.
Preferably, the anti-settling agent is modified ethylene vinyl acetate ethylene copolymer wax emulsion.
The anti-settling agent can improve aligning for effect pigment, reduce piebald, cloud mass, meanwhile, pigment sedimentation, phase can be mitigated
Than polyurethanes rheological agent, the auxiliary agent is less sensitive to cosolvent, compare clay and esters of acrylic acid rheological agent, its addition and
Usability is more preferable.
Preferably, the organic quenching powder is the poly- methyl urea polymer of thermosetting property.
The poly- methyl urea polymer of the thermosetting property that the present invention selects is the aldol(s) of urea element formaldehyde, and being that one kind is special has
Machine polymer has unique chemical structure, containing 0.6% active methylol, can during film forming with water-based hydroxyl
Acrylic emulsion crosslinks, and also strengthens while generating delustring promoting paint film contraction to be gathered into the surface of uniform bumps
The hardness and attrition resistance of paint film, cooperation ultra-fine barium sulfate can increase the damage resistant, wear-resisting property and Gloss Retention of paint film.Such as
The refined treasured Pergopak M6 organic quenching powder in the U.S., is that a kind of porosity with high-specific surface area, low bulk density is fluffy
Powder is similar to the granule of ball-type by the shape that the elementary particle that average grain diameter is 0.1-0.15um is gathered into about 5-9um, this
Higher void content and extremely non-uniform distribution of particles have been resulted in, and this exactly forms excellent extinction effect and should have
Two key factors, the almost ideal spherical shape of these particles, will not be to body compared with closer to acicular silica
Rheological property in system generates the influence of essence, and the shape of almost sphere helps to create velvet-like soft feeling, improves table
Face slipping, spheric granules can make surface have sliding property, thus reduce friction, therefore, the organic quenching powder in the present invention
The advantages of can make the paint film of preparation has high scratch resistance, weatherability good, and Gloss Retention is good, good hand touch.
The present invention also provides the preparation method of aqueous polyurethane dull finishing coat, the preparation method includes at least following step
It is rapid:
Step a weighs each group according to the design proportion of any one of the claim 1-8 aqueous polyurethane dull finishing coat
Point, by the deionized water of weighed 55-65%wt, the neutralizer of 40%-60%wt, dispersing agent, defoaming agent, 15-25wt%
Environmentally friendly cosolvent, pigments and fillers, anti-settling agent stir evenly, and grinding obtains the first slurry of fineness≤20 μm；
Step b, by weighed water-based hydroxyl acrylic emulsion, remaining deionized water, remaining neutralizer, remaining ring
Cosolvent is protected, is uniformly mixed, obtains the second slurry；
First slurry and second slurry agitation are uniformly mixed by step c, and substrate wetting agents and delustring is added
Powder is uniformly mixed, and thickener is added, and the stormer viscosity of adjustment viscosity to 25 DEG C is calculated as 75-85KU, obtains component A；
Weighed curing agent is diluted to the slurry of the 65-75wt% containing curing agent with propylene glycol diacetyl acid, obtains B by step d
Component；
A, B component are mixed, obtain aqueous polyurethane dull finishing coat by step e.
Above-mentioned preparation method is easy to operate, no complicated procedures of forming, at low cost without special equipment, is suitble to industrialization big
Large-scale production, the aqueous polyurethane dull finishing coat of preparation are suitable for the metal surface of institute's low gloss in need, with wide city
Field prospect.
Preferably, component A described in step e and the mass ratio of B component mixing are 5-10:1.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Embodiment 1
The embodiment of the present invention provides a kind of aqueous polyurethane dull finishing coat, and the aqueous polyurethane dull finishing coat includes as follows
The component of parts by weight:
Above-mentioned water-based hydroxyl acrylic emulsion is what Wan Hua Group Plc in Shanghai provided2003 hydroxyls
Base acrylic acid dispersion；Curing agent is the N3390 of Bayer Bitterfeld GmbH；Defoaming agent is the 941PL's that France first creates and Germany Bi Ke
The mixture of BYK-028, wherein the ratio of 941PL and BYK-028 is 1:2；Dispersing agent is the BYK-190 of Germany Bi Ke；Face is filled out
Material is the MA-100 carbon black of 0.1 part of Mitsubishi, 10 parts of Du Pont's R-706 titanium dioxides and 21.9 parts of ultra-fine barium sulfates；Substrate wetting
Agent is the TEGO-100 of Digao；Thickener is the RW-8M of ROHM AND HAAS；Anti-settling agent is the BYK-AQUATIX- of Bi Ke company
8421；The flatting silica is the refined treasured Pergopak M6 in the U.S..
The preparation step of above-mentioned aqueous polyurethane dull finishing coat is as follows:
Step a weighs each component according to the design proportion of the aqueous polyurethane dull finishing coat, by weighed 55%wt's
Deionized water, the neutralizer of 60%wt, dispersing agent, defoaming agent, the environmentally friendly cosolvent of 15wt%, pigments and fillers, anti-settling agent are in 600r/
It is sequentially added under the mixing speed of min in stock pot, stirs 20min, grinding obtains the first slurry of fineness≤20 μm；
Step b, by weighed water-based hydroxyl acrylic emulsion, remaining deionized water, remaining neutralizer, remaining ring
It protects cosolvent to sequentially add in paint mixing tank under the mixing speed of 300r/min, stirs 10min, obtain the second slurry；
First slurry is poured slowly into paint mixing tank, revolving speed is adjusted to 500r/min, is stirred evenly, is added by step c
Enter substrate wetting agents, stir 10min, flatting silica is added, flatting silica is light, needs repeatedly to be added on a small quantity, after being uniformly mixed, add
Enter thickener, the stormer viscosity of adjustment viscosity to 25 DEG C is calculated as 75KU, obtains component A；
Weighed curing agent is diluted to the slurry of the 65wt% containing curing agent with propylene glycol diacetyl acid, obtains B group by step d
Part；
A, B component are mixed with the mass ratio of 5:1, obtain aqueous polyurethane dull finishing coat by step e.
Embodiment 2
The embodiment of the present invention provides a kind of aqueous polyurethane dull finishing coat, and the aqueous polyurethane dull finishing coat includes as follows
The component of parts by weight:
Above-mentioned water-based hydroxyl acrylic emulsion is what Wan Hua Group Plc in Shanghai provided2003 hydroxyls
Base acrylic acid dispersion；Curing agent is the N3390 of Bayer Bitterfeld GmbH；Defoaming agent is the 941PL's that France first creates and Germany Bi Ke
The mixture of BYK-028, wherein the ratio of 941PL and BYK-028 is 1:1；Dispersing agent is the BYK-194 of Germany Bi Ke；Face is filled out
Material is the MA-100 carbon black of 0.2 part of Mitsubishi, 12 parts of Du Pont's R-706 titanium dioxides and 22.8 parts of ultra-fine barium sulfates；Substrate wetting
Agent is the TEGO-510 of Digao；Thickener is the RW-8M of ROHM AND HAAS；Anti-settling agent is the BYK-AQUATIX- of Bi Ke company
8421；The flatting silica is the refined treasured Pergopak M6 in the U.S..
The preparation step of above-mentioned aqueous polyurethane dull finishing coat is as follows:
Step a weighs each component according to the design proportion of the aqueous polyurethane dull finishing coat, by weighed 65%wt's
Deionized water, the neutralizer of 40%wt, dispersing agent, defoaming agent, the environmentally friendly cosolvent of 25wt%, pigments and fillers, anti-settling agent are in 700r/
It is sequentially added under the mixing speed of min in stock pot, stirs 20min, grinding obtains the first slurry of fineness≤20 μm；
Step b, by weighed water-based hydroxyl acrylic emulsion, remaining deionized water, remaining neutralizer, remaining ring
It protects cosolvent to sequentially add in paint mixing tank under the mixing speed of 600r/min, stirs 10min, obtain the second slurry；
First slurry is poured slowly into paint mixing tank, revolving speed is adjusted to 800r/min, is stirred evenly, is added by step c
Enter substrate wetting agents, stir 10min, flatting silica is added, flatting silica is light, needs repeatedly to be added on a small quantity, after being uniformly mixed, add
Enter thickener, the stormer viscosity of adjustment viscosity to 25 DEG C is calculated as 80KU, obtains component A；
Weighed curing agent is diluted to the slurry of the 75wt% containing curing agent with propylene glycol diacetyl acid, obtains B group by step d
Part；
A, B component are mixed with the mass ratio of 10:1, obtain aqueous polyurethane dull finishing coat by step e.
Embodiment 3
The embodiment of the present invention provides a kind of aqueous polyurethane dull finishing coat, and the aqueous polyurethane dull finishing coat includes as follows
The component of parts by weight:
Above-mentioned water-based hydroxyl acrylic emulsion is what Wan Hua Group Plc in Shanghai provided2003 hydroxyls
Base acrylic acid dispersion；Curing agent is the N3390 of Bayer Bitterfeld GmbH；Defoaming agent is the 941PL's that France first creates and Germany Bi Ke
The mixture of BYK-028, wherein the ratio of 941PL and BYK-028 is 2:1；Dispersing agent be Germany Bi Ke BYK-194 with
The mixture of BYK190, and the mass ratio of BYK-194 and BYK190 is 1:2；Pigments and fillers are the MA-100 carbon of 0.5 part of Mitsubishi
It is black, 14 parts of Du Pont's R-706 titanium dioxides and 10.5 parts of ultra-fine barium sulfates；Substrate wetting agents are the TEGO-4100 of Digao；Thickener is
The RW-8M of ROHM AND HAAS；Anti-settling agent is the BYK-AQUATIX-8421 of Bi Ke company；The flatting silica is the refined treasured in the U.S.
Pergopak M6。
The preparation step of above-mentioned aqueous polyurethane dull finishing coat is as follows:
Step a weighs each component according to the design proportion of the aqueous polyurethane dull finishing coat, by weighed 60%wt's
Deionized water, 50%wt neutralizer, dispersing agent, defoaming agent, the environmentally friendly cosolvent of 20wt%, pigments and fillers, anti-settling agent are in 800r/
It is sequentially added under the mixing speed of min in stock pot, stirs 20min, grinding obtains the first slurry of fineness≤20 μm；
Step b, by weighed water-based hydroxyl acrylic emulsion, remaining deionized water, remaining neutralizer, remaining ring
It protects cosolvent to sequentially add in paint mixing tank under the mixing speed of 500r/min, stirs 10min, obtain the second slurry；
First slurry is poured slowly into paint mixing tank, revolving speed is adjusted to 700r/min, is stirred evenly, is added by step c
Enter substrate wetting agents, stir 10min, flatting silica is added, flatting silica is light, needs repeatedly to be added on a small quantity, after being uniformly mixed, add
Enter thickener, the stormer viscosity of adjustment viscosity to 25 DEG C is calculated as 85KU, obtains component A；
Weighed curing agent is diluted to the slurry of the 70wt% containing curing agent with propylene glycol diacetyl acid, obtains B group by step d
Part；
A, B component are mixed with the mass ratio of 7:1, obtain aqueous polyurethane dull finishing coat by step e.
Embodiment 4
The embodiment of the present invention provides a kind of aqueous polyurethane dull finishing coat, and the aqueous polyurethane dull finishing coat includes as follows
The component of parts by weight:
Above-mentioned water-based hydroxyl acrylic emulsion is what Wan Hua Group Plc in Shanghai provided2003
Hydroxyl acrylic aqueous dispersion；Curing agent is the N3390 of Bayer Bitterfeld GmbH；Environmentally friendly cosolvent is propandiol butyl ether and propylene glycol monomethyl ether
Mixture, and the mass ratio of propandiol butyl ether and propylene glycol monomethyl ether is 1:1；Defoaming agent is the 941PL that France first creates and Germany finishes
Gram BYK-028 mixture, wherein the ratio of 941PL and BYK-028 be 1:1；Dispersing agent be Germany Bi Ke BYK-194 with
The mixture of BYK190, and the mass ratio of BYK-194 and BYK190 is 1:1；Pigments and fillers are the MA-100 carbon of 0.4 part of Mitsubishi
It is black, 15 parts of Du Pont's R-706 titanium dioxides and 12.6 parts of ultra-fine barium sulfates；Substrate wetting agents are the TEGO100 and TEGO-4100 of Digao
Mixture, and the mass ratio of TEGO100 and TEGO-4100 be 1:1；Thickener is the RW-8M of ROHM AND HAAS；Anti-settling agent is complete
The BYK-AQUATIX-8421 of gram company；The flatting silica is the refined treasured Pergopak M6 in the U.S..
The preparation method of aqueous polyurethane dull finishing coat is same as Example 3.
Embodiment 5
The embodiment of the present invention provides a kind of aqueous polyurethane dull finishing coat, and the aqueous polyurethane dull finishing coat includes as follows
The component of parts by weight:
Above-mentioned water-based hydroxyl acrylic emulsion is what Wan Hua Group Plc in Shanghai provided2003
Hydroxyl acrylic aqueous dispersion；Curing agent is the N3390 of Bayer Bitterfeld GmbH；Defoaming agent is the 941PL's that France first creates and Germany Bi Ke
The mixture of BYK-028, wherein the ratio of 941PL and BYK-028 is 2:1；Dispersing agent be Germany Bi Ke BYK-194 with
The mixture of BYK190, and the mass ratio of BYK-194 and BYK190 is 2:1；Pigments and fillers are the MA-100 carbon of 0.3 part of Mitsubishi
It is black, 12 parts of Du Pont's R-706 titanium dioxides and 13.7 parts of ultra-fine barium sulfates；Substrate wetting agents are the TEGO-510 and TEGO- of Digao
4100 mixture, and the mass ratio of TEGO-510 and TEGO-4100 is 1:1；Thickener is the RW-8M of ROHM AND HAAS；It is anti-settling
Agent is the BYK-AQUATIX-8421 of Bi Ke company；The flatting silica is the refined treasured Pergopak M6 in the U.S..
The preparation method of aqueous polyurethane dull finishing coat is same as Example 3.
Aqueous polyurethane dull finishing coat manufactured in the present embodiment is subjected to quality testing according to professional standard, the results are shown in Table 1.
Table 1
The characteristic for the aqueous polyurethane dull finishing coat that embodiment provides in order to better illustrate the present invention, below to the above reality
The aqueous polyurethane dull finishing coat of 1-5 preparation and a commercial product are applied, quality testing is carried out, the results are shown in Table 2.
Wherein, comparative example 1 is that the organic quenching powder in embodiment 5 is replaced with fumed silica flatting silica, comparative example 2
For market standard aqueous polyurethane matte product, comparative example 3 is market standard aqueous polyurethane high smooth product.
Table 2
Note: wear-resisting property test is according to the People's Republic of China's building industry professional standard-synthetic resin emulsion interior wall
In coating, the measurement standard of the 9266 building coating coating abrasion resistance of GB/T provided is tested, wherein scrub resistance number
>=300 be qualified product, and scrub resistance number >=1000 are Grade A, and scrub resistance number >=5000 are high-class product.
In conclusion aqueous polyurethane dull finishing coat prepared by the present invention, can reach the performance of same system bloom paint film
It is required that and water resistance, resistance to acid and alkali, resistance to ag(e)ing and wear-resisting property are excellent, and VOC content is low, safety and environmental protection, reality with higher
With value.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modification, equivalent replacement or improvement etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of aqueous polyurethane dull finishing coat, which is characterized in that the aqueous polyurethane dull finishing coat includes following parts by weight
Component: 35-45 parts of water-based hydroxyl acrylic emulsion, 5-15 parts of curing agent, environmentally friendly cosolvent 5-10 parts, neutralizer 0.1-0.5
Part, 0.1-0.5 parts of defoaming agent, 1-5 parts of dispersing agent, 25-35 parts of pigments and fillers, 0.5-1 parts of substrate wetting agents, 1-5 parts of thickener, prevent
It is agent 0.5-1 parts heavy, 0.5-2.5 parts and deionized water 10-20 parts of organic quenching powder.
2. aqueous polyurethane dull finishing coat as described in claim 1, which is characterized in that the aqueous polyurethane matte surface enamel-cover
Component containing following parts by weight: 32-43 parts of water-based hydroxyl acrylic emulsion, 6-13 parts of curing agent, environmentally friendly cosolvent 6-9 parts, in
With 0.2-0.4 parts of agent, 0.2-0.4 parts of defoaming agent, 2-4 parts of dispersing agent, 26-33 parts of pigments and fillers, 0.6-0.9 parts of substrate wetting agents,
2-4 parts of thickener, 0.6-0.9 parts of anti-settling agent, 0.8-2.3 parts and deionized water 12-19 parts of organic quenching powder.
3. aqueous polyurethane dull finishing coat as described in claim 1, which is characterized in that the aqueous polyurethane matte surface enamel-cover
Component containing following parts by weight: 43 parts of water-based hydroxyl acrylic emulsion, 12 parts of curing agent, 6 parts of environmentally friendly cosolvent, neutralizer 0.3
Part, 0.3 part of defoaming agent, 3 parts of dispersing agent, 30 parts of pigments and fillers, 0.6 part of substrate wetting agents, 3 parts of thickener, 0.7 part of anti-settling agent, have
2 parts and 15 parts of deionized water of machine flatting silica.
4. aqueous polyurethane dull finishing coat as described in claim 1, which is characterized in that the curing agent is aliphatic poly isocyanide
Acid esters；And/or
The environmental protection cosolvent is one or both of propandiol butyl ether, propylene glycol monomethyl ether；And/or
The neutralizer is dimethylethanolamine.
5. aqueous polyurethane dull finishing coat as described in claim 1, which is characterized in that defoaming agent described in the defoaming agent is phosphorus
The mixture of the sour defoaming of lipid hydrophobicity foam inhibitor and organic silicon defoaming agent.
6. aqueous polyurethane dull finishing coat as described in claim 1, which is characterized in that the dispersing agent is containing the affine base of pigment
The high molecular weight block copolymer solution of group；And/or
The pigments and fillers are the mixture of carbon black, titanium dioxide and ultra-fine barium sulfate.
7. aqueous polyurethane dull finishing coat as described in claim 1, which is characterized in that the substrate wetting agents are polyethers silicon oxygen
Alkyl copolymer；And/or
The thickener is the swollen association thickener of alkali soluble.
8. aqueous polyurethane dull finishing coat as described in claim 1, which is characterized in that the anti-settling agent is modified ethylene vinyl acetate
Ethylene copolymer wax emulsion；And/or
The organic quenching powder is the poly- methyl urea polymer of thermosetting property.
9. a kind of preparation method of aqueous polyurethane dull finishing coat, which is characterized in that at least include the following steps:
Step a weighs each component according to the design proportion of any one of the claim 1-8 aqueous polyurethane dull finishing coat, will
The environmental protection of the deionized water of weighed 55-65%wt, the neutralizer of 40%-60%wt, dispersing agent, defoaming agent, 15-25wt% helps
Solvent, pigments and fillers, anti-settling agent stir evenly, and grinding obtains the first slurry of fineness≤20 μm；
Step b helps weighed water-based hydroxyl acrylic emulsion, remaining deionized water, remaining neutralizer, remaining environmental protection
Solvent is uniformly mixed, and obtains the second slurry；
First slurry and second slurry agitation are uniformly mixed by step c, and substrate wetting agents and flatting silica is added, stirs
Mix it is uniformly mixed, be added thickener, adjustment viscosity to 25 DEG C stormer viscosity be calculated as 75-85KU, obtain component A；
Weighed curing agent is diluted to the slurry of the 65-75wt% containing curing agent with propylene glycol diacetyl acid, obtains B group by step d
Part；
A, B component are mixed, obtain aqueous polyurethane dull finishing coat by step e.
10. the preparation method of aqueous polyurethane dull finishing coat as claimed in claim 9, which is characterized in that A described in step e
Component and the mass ratio of B component mixing are 5-10:1.
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