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Preparation method for automotive topcoat

A technology for automotive topcoats and preparation steps, applied in coatings, polyurea/polyurethane coatings, etc., can solve problems such as poor water resistance, and achieve the effects of excellent acid and alkali resistance, low curing temperature, and excellent temperature resistance

Active Publication Date: 2019-04-12
林飘飘
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Technical problem to be solved by the present invention: Aiming at the problem of poor water resistance of existing materials, a preparation method of automobile topcoat is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] Mix fluorosilicone resin and water-based polyurethane resin at a mass ratio of 1:2, stir at a speed of 100r / min, ball-to-material ratio of 3:1, ball mill for 1 hour to obtain a mixture, add silicone acrylic emulsion at a mass ratio of 1:1, and continue Ball mill for 1 hour to obtain component A; mix nano-titanium dioxide, graphene and deionized water at a mass ratio of 1:1:10, and ultrasonically disperse for 10 minutes to obtain a dispersion, add BYK-110 at a mass ratio of 1:10, and continue to ultrasonically disperse 15 minutes to get component B; in parts by weight, weigh 10 parts of component A, 1 part of component B, 5 parts of silicone acrylic emulsion, 0.2 parts of defoamer, 0.5 parts of curing agent, and 0.1 part of leveling agent , 30 parts of deionized water, mix component A and silicone acrylic emulsion evenly to obtain a blend, add component B, defoamer, curing agent, leveling agent and deionized water and mix at a speed of 4000r / min After dispersing at high ...

example 2

[0027] Mix fluorosilicone resin and water-based polyurethane resin at a mass ratio of 1:2, stir at a speed of 150r / min, ball-to-material ratio of 3:1, ball mill for 1 hour to obtain a mixture, add silicone acrylic emulsion at a mass ratio of 1:1, and continue Ball mill for 1 hour to obtain component A; mix nano-titanium dioxide, graphene and deionized water at a mass ratio of 1:1:10, and ultrasonically disperse for 15 minutes to obtain a dispersion, add BYK-110 at a mass ratio of 1:10, and continue to ultrasonically disperse 18min, get component B; in parts by weight, weigh 15 parts of component A, 3 parts of component B, 8 parts of silicone acrylic emulsion, 0.3 parts of defoamer, 0.6 parts of curing agent, 0.2 parts of leveling agent , 35 parts of deionized water, mix component A and silicone acrylic emulsion evenly to obtain a blend, add component B, defoamer, curing agent, leveling agent and deionized water and mix at a speed of 4500r / min After dispersing at high speed for...

example 3

[0029] Mix fluorosilicone resin and water-based polyurethane resin at a mass ratio of 1:2, stir at a speed of 200r / min, ball-to-material ratio of 3:1, ball mill for 2 hours to obtain a mixture, add silicone acrylic emulsion at a mass ratio of 1:1, and continue Ball mill for 2 hours to obtain component A; mix nano-titanium dioxide, graphene and deionized water at a mass ratio of 1:1:10, and ultrasonically disperse for 20 minutes to obtain a dispersion, add BYK-110 at a mass ratio of 1:10, and continue ultrasonically dispersing 20min to get component B; in parts by weight, weigh 20 parts of component A, 5 parts of component B, 10 parts of silicone acrylic emulsion, 0.5 parts of defoamer, 0.7 parts of curing agent, and 0.3 parts of leveling agent , 40 parts of deionized water, mix component A and silicone acrylic emulsion evenly to obtain a blend, add component B, defoamer, curing agent, leveling agent and deionized water and mix at a speed of 5000r / min After dispersing at high s...

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PUM

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Abstract

The invention relates to a preparation method for an automotive topcoat, and belongs to the technical field of coat preparation. The preparation method provided by the invention has the following beneficial technical effects: water-based polyurethane and fluorosilicone resin are subjected to mixing modification to prepare the automotive topcoat with better hydrophobicity, and the prepared automotive topcoat not only has high-strength mechanical properties of the single-component polyurethane, but also has high gloss, a low curing temperature, and excellent acid and alkali resistance, salt spray resistance and weather resistance; polyurethane resin has better hydrophobicity compared with polyacrylic resin, so that some sensitivity to water molecules caused by introduction of amino can be offset, and the fluorosilicone resin has excellent temperature resistance, adhesion resistance, chemical resistance, antifouling properties and decorative properties; a curing agent used in the preparation method is an isocyanate compound, the isocyanate compound has very good compatibility with various resin and solvents and relatively-low sensitivity to moisture in the air, so that the defects ofa topcoat film caused by high humidity can be avoided; and the topcoat has a quick drying speed.

Description

technical field [0001] The invention relates to a method for preparing an automobile topcoat, which belongs to the technical field of paint preparation. Background technique [0002] Automobile topcoat is the final coating in the multi-layer coating system of automobiles, which gives the car color, appearance decoration and the function of protecting the entire coating. The color of automobiles is developing towards diversification and individualization. In addition to natural colors, it also includes various flash colors, such as metallic flash colors and pearlescent colors. While the topcoat is coloring the car, it is more important to improve the decorative appearance, so that the car coating has high gloss, high fullness, high distinctness of image, etc., and the topcoat should also have a base coat and its own protection. [0003] Automotive topcoats are mainly divided into two types: solid color paint and metallic flash paint. Nowadays, in order to adapt to the coat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D133/04C09D175/04C09D183/08C09D7/61
CPCC08K2003/2241C08K2201/011C09D143/04C09D7/61C08L75/04C08L83/08C08K3/22C08K3/042
Inventor 郭跃王凡骆兵建
Owner 林飘飘
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