A kind of preparation method of automobile paint

A technology for coatings and automobiles, applied in the direction of coatings, etc., can solve problems such as poor stability, stretchability and low temperature resistance

Active Publication Date: 2021-02-12
常州启赋安泰复合材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The polyaspartic automotive coating has good anti-corrosion performance, weather resistance and decorative properties, but there are still problems such as poor stability, stretchability and low temperature resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] The preparation method of described automobile paint, comprises the following steps:

[0034]S1: Mix water-based polyurethane resin and methacrylic acid, heat to 75-80°C under stirring, react for 30 minutes, then add polyoxyethylene oleate, react at 75-80°C for 1.5-3 hours, cool down to 50- 55°C, then add triethylamine to react for 15-20min, at the same time cool down to 35-40°C, then add water to disperse, raise the temperature to 50-55°C and react for 30min, remove the solvent in vacuum to obtain the modified waterborne polyurethane resin;

[0035] S2: Stir the modified water-based polyurethane resin, polyaspartic resin, nano-titanium dioxide, titanium dioxide, dispersant, defoamer, and anti-sedimentation agent quickly and evenly, and then slowly add leveling agent and wetting agent under stirring at 1100-1300r / min. The wet agent and ethylene glycol butyl ether are fully stirred and adjusted evenly, and ground in a ball mill for 20-26 hours to 6-10 μm to obtain the ma...

Embodiment 1

[0038] A kind of automobile paint, is made up of main agent and curing agent, and described main agent is by weight, comprises following raw material: polyaspartic resin 30 parts, nano-titanium dioxide 2 parts, waterborne polyurethane resin 40 parts, methacrylic acid 1.4 parts , 0.8 parts of polyoxyethylene oleate, 9 parts of water, 15 parts of titanium dioxide, 0.2 parts of bentonite, 2 parts of dispersant BYK-333, 0.5 parts of leveling agent BYK-300, 0.3 parts of defoamer BYK-093, ethanol 0.2 parts, 0.3 parts of triethylamine, and 4 parts of ethylene glycol butyl ether; the curing agent includes the following raw materials: 14 parts of isocyanate resin, and 0.1 part of dibutyltin.

[0039] The preparation method of described automobile paint, comprises the following steps:

[0040] S1: Mix water-based polyurethane resin and methacrylic acid, heat to 80°C under stirring, react for 30 minutes, then add polyoxyethylene oleate, react at 78°C for 3 hours, cool down to 50°C, and t...

Embodiment 2

[0044] A kind of automobile paint, is made up of main agent and solidifying agent, and described main agent comprises following raw material in parts by weight: 40 parts of polyaspartic resin, 1 part of nano-titanium dioxide, 32 parts of waterborne polyurethane resin, 1 part of methacrylic acid , 0.6 parts of polyoxyethylene oleate, 7 parts of water, 12 parts of titanium dioxide, 0.6 parts of anti-dust wax, 1.5 parts of dispersant BYK-310, 0.3 parts of leveling agent BYK-301, 0.2 parts of defoamer BYK-093 , 0.1 part of propylene glycol, 0.8 part of triethylamine, and 8 parts of ethylene glycol butyl ether; the curing agent includes the following raw materials: 12 parts of isocyanate resin and 0.6 part of zinc sulfonate.

[0045] The preparation method of described automobile paint, comprises the following steps:

[0046] S1: Mix water-based polyurethane resin and methacrylic acid, heat to 78°C under stirring, react for 30 minutes, then add polyoxyethylene oleate, react at 75°C...

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PUM

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Abstract

The invention discloses a preparation method of automobile paint, which belongs to the technical field of paint. The coating is composed of a main agent and a curing agent, and the main agent includes the following raw materials: polyaspartic resin, nano-titanium dioxide, water-based polyurethane resin, methacrylic acid, polyoxyethylene oleate, water, titanium dioxide, anti-settling agent , dispersant, leveling agent, defoamer, wetting agent, triethylamine, ethylene glycol butyl ether; the curing agent includes the following raw materials: isocyanate resin, catalyst. The invention is prepared through the steps of water-based polyurethane resin preparation, main agent preparation, mixing and the like. In the present invention, the reinforcing system composed of nano-titanium dioxide, water-based polyurethane resin, methacrylic acid, and polyoxyethylene oleate is used in the automotive coating of the present invention to improve the tensile strength, elongation at break, and low temperature resistance of the automotive coating. Sex, reduce paint fineness, improve paint stability.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a preparation method of automotive coatings. Background technique [0002] In the past 50 years, automotive topcoats have undergone great changes in terms of base material, topcoat color and construction. It is mainly manifested in the base material from nitro enamel to amino alkyd enamel, self-drying alkyd enamel for primer to thermoplastic acrylic resin enamel, among which thermosetting acrylic resin enamel and polyurethane stain resistance have been greatly improved. This improves the protective performance of the topcoat. At the same time, the color of the topcoat is becoming more and more diverse, and the appearance of various types of cars is also richer. By the 1990s, more and more attention was paid to environmental protection around the world, and automotive topcoats began to change to water-based automotive topcoats. Automotive topcoats are mainly enamel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/02C09D4/06C09D7/61C09D7/65
CPCC09D4/06C09D7/61C09D7/65
Inventor 不公告发明人
Owner 常州启赋安泰复合材料科技有限公司
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