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Air-drying automobile-used water-based finishing coat and water-based intermediate coat, as well as preparation method and use methods thereof

A water-based topcoat, self-drying technology, used in coatings, polyurea/polyurethane coatings, etc., can solve the problems of uneven gloss, easy sagging, pigment drift, etc., achieve uniform particle size distribution, good compatibility, The effect of low molecular weight

Active Publication Date: 2015-07-29
肇庆千江水漆有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the water-based coatings currently used on cars, there are the following problems in the application process: 1. When spraying large-area facades, it is easy to sag, unsatisfactory leveling, uneven gloss, pigment drift, and blooming; 2. The fullness of the topcoat paint film is not enough, it looks shriveled, and the gloss is not high enough; 3. It cannot dry itself in a natural state; 4. The matching performance indicators are not ideal

Method used

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  • Air-drying automobile-used water-based finishing coat and water-based intermediate coat, as well as preparation method and use methods thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0083] (a) Add 10 parts of water-based castor oil modified alkyd resin, 20 parts of water-based acrylic resin, 0.1 part of defoamer, 0.5 part of dispersant, 0.1 part of wetting agent and 2 parts of deionized water into the stirring tank in sequence, Under the condition of 400~800r / min rotating speed, stir for 5~10 minutes.

[0084] (b) Add 0.1 part of pH regulator, adjust the pH to 7.0~9.0, and stir for 10~15 minutes at 400~800r / min.

[0085] (c) Add 2 parts of pigments, 0.1 parts of preservatives, 0.1 parts of rheology modifiers, 2 parts of film-forming aids, and 0.2 parts of thickeners in sequence, and stir and disperse for 20~30 minutes at a speed of 600~1000r / min. minute.

[0086] (d) Add 0.1 parts of leveling agent, and stir and disperse for 5 to 10 minutes at a speed of 400 to 600 r / min.

[0087] (e) Finally, add 3 parts of deionized water to adjust the viscosity, and stir for 10-15 minutes at a speed of 400-600r / min to obtain a water-based two-component polyurethane s...

Embodiment 2

[0091] (a) Add 30 parts of water-based castor oil modified alkyd resin, 50 parts of water-based acrylic resin, 1 part of defoamer, 5 parts of dispersant, 1 part of wetting agent and 3 parts of deionized water into the stirring tank, Under the condition of 400~800r / min rotating speed, stir for 5~10 minutes.

[0092](b) Add 0.5 parts of pH regulator, adjust the pH to 7.0~9.0, and stir for 10~15 minutes at 400~800r / min.

[0093] (c) Add 25 parts of pigments, 0.2 parts of preservatives, 1 part of rheology modifier, 15 parts of film-forming aids, and 1 part of thickener in sequence, and stir and disperse for 20-30 minute.

[0094] (d) Add 0.5 parts of leveling agent, and stir and disperse for 5 to 10 minutes at a speed of 400 to 600 r / min.

[0095] (e) Finally, add 7 parts of deionized water to adjust the viscosity, and stir for 10-15 minutes at a speed of 400-600r / min to obtain a water-based two-component polyurethane solid color topcoat.

[0096] Then provide silicon-modified ...

Embodiment 3

[0099] (a) Add 20 parts of water-based castor oil modified alkyd resin, 35 parts of water-based acrylic resin, 0.5 part of defoamer, 3 parts of dispersant, 0.6 part of wetting agent and 3 parts of deionized water into the stirring tank in sequence, Under the condition of 400~800r / min rotating speed, stir for 5~10 minutes.

[0100] (b) Add 0.3 parts of pH regulator, adjust the pH to 7.0~9.0, and stir for 10~15 minutes at 400~800r / min.

[0101] (c) Add 14 parts of pigments, 0.15 parts of preservatives, 0.5 parts of rheology modifiers, 8 parts of film-forming aids, and 0.6 parts of thickeners in sequence, and stir and disperse for 20~30 minute.

[0102] (d) Add 0.3 parts of leveling agent, and stir and disperse for 5 to 10 minutes at a speed of 400 to 600 r / min.

[0103] (e) Finally, add 4 parts of deionized water to adjust the viscosity, and stir for 10-15 minutes at a speed of 400-600r / min to obtain a water-based two-component polyurethane solid color topcoat.

[0104] Then ...

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Abstract

The invention discloses air-drying automobile-used water-based finishing coat and water-based intermediate coat, as well as preparation method and use methods thereof. The air-drying automobile-used water-based finishing coat and water-based intermediate coat mainly comprise water-based castor oil modified alkyd resin, water-based acrylic resin, a silicon modified dual-crosslinking water-based polyurethane curing agent, and other additives. The preparation methods comprise the following steps: preparing main coat with castor oil modified alkyd resin, water-based acrylic resin and the additives; providing curing agents and water. The use methods comprise the steps of mixing main coat, the curing agents and water in a weight proportion. The air-drying automobile-used water-based finishing coat and water-based intermediate coat can be dried directly in a natural environment, and have the advantages that defects of curtaining, flower formation, drifting and the like are avoided in spraying on a large-area vertical surface; the rigidity, fullness and weatherability are high.

Description

technical field [0001] The invention relates to a water-based topcoat for self-drying vehicles, a water-based primer for self-drying vehicles, and a corresponding preparation method and application method. Background technique [0002] At present, the automobile, high-speed rail, intercity railway, subway, light rail and other transportation industries are developing rapidly, and these vehicles are facing maintenance at any time, and the number of them is even larger. In order to protect the global environment and vigorously develop a low-carbon economy, the promotion and application of water-based coatings on vehicles is the trend of the trend. Although many companies are now vigorously developing water-based coatings, there are very few water-based coatings that can be used on vehicles on a large scale. [0003] In 2013, the applicant applied for a patent titled water-based car paint and its preparation method and method of use. Although the water-based car paint disclose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/12C09D7/06C09D7/00C09D7/47
CPCC08L2205/025C08L2205/035C09D7/20C09D7/47C09D7/61C09D7/63C09D7/65C09D175/14C08L75/04C08L83/04C08L33/02C08L71/00C08K13/02C08K2003/2241C08K3/04C08K5/06C08K5/17
Inventor 李会宁陈仕箐
Owner 肇庆千江水漆有限公司
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