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Automobile coating and preparation method thereof

A coating and automotive technology, applied in the coating and other directions, can solve the problems of poor stability, tensile and low temperature resistance, etc.

Active Publication Date: 2018-12-18
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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  • Automobile coating and preparation method thereof

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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-3332 parts, 0.5 parts of leveling agent BYK-3000, 0.3 parts of defoamer BYK-0930, 0.2 parts of ethanol, 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 5...

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-3010, 0.2 parts of defoaming agent BYK-093, 0.1 parts of propylene glycol part, 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, ...

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Abstract

The invention discloses an automobile coating and a preparation method thereof, and belongs to the technical field of coatings. The coating comprises a main agent and a curing agent, and the main agent comprises polyaspartic acid resin, nanometer titanium dioxide, waterborne polyurethane resin, methacrylic acid, polyoxyethylene oleate, water, titanium dioxide, an anti-settling agent, a dispersant,a leveling agent, an antifoaming agent, a wetting agent, triethylamine and ethylene glycol butyl ether; and the curing agent comprises isocyanate resin and a catalyst. The coating is prepared by thefollowing steps: preparation of the aqueous polyurethane resin, preparation of the main agent, and mixing. A reinforcing system formed by the nanometer titanium dioxide, waterborne polyurethane resin,methacrylic acid and polyoxyethylene oleate is used in the automobile coating to improve the tensile strength, the elongation at break and the low temperature resistance of the automobile coating, reduce the fineness of the coating and improve the stability of the coating.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to an automotive coating and a preparation method thereof. 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 ma...

Claims

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Application Information

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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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