Water-based acrylic polyurethane amino baking pearlescent paint and preparation method thereof

An acrylic polyurethane amino, water-based amino resin technology, applied in the field of coatings, can solve the problems of weak resistance and mechanical properties of paint films, low gloss of water-based amino baking paints, agglomeration of pearlescent pigments, etc., and achieve the effect of good weather resistance and mechanical properties.

Active Publication Date: 2020-03-27
GUANGZHOU JOINTAS CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional oil-based paints have disadvantages such as high VOC content, large pollution, and severe irritating odors. The benzene series substances, formaldehyde and other harmful substances contained in the paint seriously affect the physical and mental health of workers.
Compared with traditional solvent-based coatings, water-based amino baking varnish has slightly lower gloss, and slightly weaker mechanical properties of resistance and paint film.
In addition, compared with solvent-based paints, water-based pearlescent paints are more difficult to arrange the pearlescent powder in an orientation.
[0004] In the preparation process of the existing pearlescent pigments, the following technical problems may occur: the pearlescent pigments are agglomerated and the gun head is blocked; the atomization effect of the pearlescent paint is poor, the sprayed paint mist is uneven, and the hiding power is poor; the paint film is prone to hammer marks or Streaks; white spots or pits in paint film

Method used

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  • Water-based acrylic polyurethane amino baking pearlescent paint and preparation method thereof
  • Water-based acrylic polyurethane amino baking pearlescent paint and preparation method thereof
  • Water-based acrylic polyurethane amino baking pearlescent paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] The composition of this example water-based acrylic polyurethane amino baking pearlescent paint is shown in Table 1, and its preparation method is as follows:

[0061] 1) Take 100 parts of hexamethylene diisocyanate trimer, 2.5 parts of isophorone diisocyanate, 2.5 parts of diphenylmethane diisocyanate, 30 parts of 1-methyl-2-pyrrolidone, and mix them uniformly at 50°C. Stir for 30 minutes. Gradually add 10 parts of polyethylene glycol and keep at 70°C for 1 hour. Add 5 parts of 2,2-dimethylolpropionic acid, maintain 70°C, and stir for 30 minutes. Add 1 part of hexanediol and keep warm at 70°C for 1.5 hours. Add 3.5 parts of dimethylethanolamine and stir for 10 minutes. Add 40 parts of 3,5-dimethylpyrazole, and stir the mixture at 70°C for 5 minutes to obtain a blocked isocyanate curing agent, named A-1, and set aside.

[0062] 2) Under the stirring condition of 600rpm, according to the mass ratio, add 8 parts of 400 mesh pearl powder, 5 parts of ethylene glycol mon...

Embodiment 2

[0065] The composition of this example water-based acrylic polyurethane amino baking pearlescent paint is shown in Table 1, and its preparation method is as follows:

[0066] 1) Take 90 parts of hexamethylene diisocyanate trimer, 2.5 parts of isophorone diisocyanate, 2.5 parts of diphenylmethane diisocyanate, 30 parts of 1-methyl-2-pyrrolidone, and mix them uniformly at 50°C. Stir for 30 minutes. Gradually add 8 parts of polyethylene glycol and keep at 70°C for 1 hour. Add 4.5 parts of 2,2-dimethylolpropionic acid, maintain 70°C, and stir for 30 minutes. Add 0.5 parts of hexanediol and keep warm at 70°C for 1.5 hours. Add 3 parts of dimethylethanolamine and stir for 10 minutes. Add 35 parts of 3,5-dimethylpyrazole, and stir the mixture at 70°C for 5 minutes to obtain a blocked isocyanate curing agent, named A-2, and set aside.

[0067] 2) Under the stirring condition of 600rpm, according to the mass ratio, add 6 parts of 600 mesh pearl powder, 5 parts of dipropylene glycol...

Embodiment 3

[0070] The composition of this example water-based acrylic polyurethane amino baking pearlescent paint is shown in Table 1, and its preparation method is as follows:

[0071] 1) Take 100 parts of hexamethylene diisocyanate trimer, 2 parts of isophorone diisocyanate, 2 parts of diphenylmethane diisocyanate, 25 parts of 1-methyl-2-pyrrolidone, and mix them uniformly at 50°C. Stir for 30 minutes. Gradually add 9 parts of polyethylene glycol and keep at 70°C for 1 hour. Add 5 parts of 2,2-dimethylolpropionic acid, maintain 70°C, and stir for 30 minutes. Add 1 part of hexanediol and keep warm at 70°C for 1.5 hours. Add 3 parts of dimethylethanolamine and stir for 10 minutes. Add 40 parts of 3,5-dimethylpyrazole, and stir the mixture at 70°C for 5 minutes to obtain a blocked isocyanate curing agent, named A-3, and set aside.

[0072] 2) Under the stirring condition of 600rpm, according to the mass ratio, add 5 parts of 400 mesh pearl powder, 5 parts of diethylene glycol monobuty...

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Abstract

The invention discloses water-based acrylic polyurethane amino baking pearlescent paint and a preparation method thereof. The water-based acrylic polyurethane amino baking pearlescent paint is prepared from the following components including hydroxyl acrylic dispersion, water-based amino resin, a pH regulator, a cosolvent, a closed isocyanate curing agent, pearl powder, a defoaming agent, a dispersing agent, a wetting agent, water, a pearl powder directional arrangement agent and a thickening agent, wherein the closed isocyanate curing agent contains aliphatic chain segments, isocyanurate rings and aromatic ring groups. The invention also discloses a preparation method of the water-based pearlescent paint. The water-based pearlescent paint disclosed by the invention has low VOC content, excellent environmental protection performance, high paint film crosslinking density, full paint film, high glossiness, high hardness, good mechanical property and excellent adhesive force. The water-based pearlescent paint has the advantages of good directional arrangement effect of the pearlescent powder and excellent pearlescent effect and is suitable for mechanical equipment. Meanwhile, due to the single component, the construction is convenient, the performance is stable, and the application prospect is wide.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a water-based acrylic polyurethane amino baking pearlescent paint and a preparation method thereof. Background technique [0002] Adding mica pearlescent pigments to the paint, it will produce gorgeous soft luster, iridescent colors, like pearls shining, attracting people's attention. Pearlescent pigments are transparent metal oxides with high refractive index coated on the surface of transparent mica flakes. When exposed to the natural environment, they will produce beautiful and elegant hues and luster through refraction and reflection of sunlight. [0003] Traditional oil-based paints have disadvantages such as high VOC content, heavy pollution, and severe pungent odors. The harmful substances such as benzene series substances and formaldehyde contained in the paint seriously affect the physical and mental health of workers. Compared with traditional solvent-based coatings, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D161/32C09D7/61C09D7/20C08G18/32C08G18/34C08G18/48C08G18/66C08G18/75C08G18/76C08G18/79C08G18/80
CPCC08G18/3206C08G18/348C08G18/4833C08G18/6692C08G18/751C08G18/7671C08G18/792C08G18/8048C08K2003/2241C09D175/04C09D7/20C09D7/61C08L61/32C08K13/02C08K3/34C08K3/22
Inventor 陈卓陈剑华王建川
Owner GUANGZHOU JOINTAS CHEM
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