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Double-liquid polyurethane coating

A technology of liquid polyurethane and coatings, applied in the field of coatings, can solve the problems of coating film gloss, hardness, poor fullness, poor adhesion of plastic materials, etc., and achieve the effect of excellent wear resistance

Inactive Publication Date: 2012-08-08
东莞大宝化工制品有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the widely used hydroxy acrylic resins include high-hydroxyl and low-hydroxyl resins. High-hydroxyl resins have high gloss, good fullness, high hardness, good chemical resistance and water resistance, but poor adhesion to plastic materials. The low-hydroxyl resin has good adhesion to plastic materials and good weather resistance, while the gloss, hardness, and fullness of the coating film are relatively poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A two-component polyurethane coating, suitable for water transfer printing surface coating of automobile interior, is composed of A component and B component, and the mass ratio of A component and B component is 4: 1; Sub-composition includes composition and the mass percent of each composition as follows:

[0021] High hydroxyl acrylic resin 38%;

[0022] Low hydroxyl acrylic resin 15%;

[0023] Xylene or propylene glycol methyl ether acetate 45%;

[0024] Polyether modified polydimethylsiloxane copolymer 1%;

[0025] UV absorber 1%;

[0026] The B component is an aliphatic polyisocyanate curing agent.

[0027] The aliphatic polyisocyanate curing agent is selected from Bayer N3390 curing agent.

[0028] The ultraviolet absorber is selected from salicylate ultraviolet absorbers.

[0029] The ultraviolet absorber is selected from salicylphenyl ester.

[0030] The A component and the B component can be mixed uniformly before use.

Embodiment 2

[0032] A two-component polyurethane coating, suitable for water transfer printing surface coating of automobile interior, is composed of A component and B component, and the mass ratio of A component and B component is 4.5:1; Sub-composition includes composition and the mass percent of each composition as follows:

[0033] High hydroxyl acrylic resin 55%;

[0034] Low hydroxyl acrylic resin 10%;

[0035] Xylene or propylene glycol methyl ether acetate 34%;

[0036] Polyether modified polydimethylsiloxane copolymer 0.5%;

[0037] UV absorber 0.5%;

[0038] The B component is an aliphatic polyisocyanate curing agent.

[0039] The aliphatic polyisocyanate curing agent is selected from Bayer bayer Desmodos N3300 aliphatic polyisocyanate (HDI trimer) curing agent.

[0040] The ultraviolet absorber is selected from benzophenones, benzotriazoles, substituted acrylonitriles and triazine ultraviolet absorbers.

[0041] The ultraviolet absorber is selected from ultraviolet absor...

Embodiment 3

[0044] A two-component polyurethane coating, suitable for water transfer printing surface coating of automobile interior, is composed of A component and B component, and the mass ratio of A component and B component is 4: 1; Sub-composition includes composition and the mass percent of each composition as follows:

[0045] High hydroxyl acrylic resin 46%;

[0046] Low hydroxyl acrylic resin 12%;

[0047] Xylene or propylene glycol methyl ether acetate 40%;

[0048] Polyether modified polydimethylsiloxane copolymer 1%;

[0049] UV absorber 1%;

[0050] The B component is an aliphatic polyisocyanate curing agent.

[0051] The aliphatic polyisocyanate curing agent is selected from Bayer N3390 curing agent.

[0052] The ultraviolet absorber is selected from water benzotriazole ultraviolet absorbers.

[0053] The A component and the B component can be mixed uniformly before use.

[0054] In order to further illustrate the performance of the two-component polyurethane coating ...

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PUM

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Abstract

The invention provides a double-liquid polyurethane coating, which is suitable for water transfer surface coating of automotive trim. A mass ratio of a component A to a component B is 4-4.5:1; the component A includes 38-55% of high hydroxyl acrylic acid resin, 10-15% of low hydroxyl acrylic resin, 34-45% of dimethylbenzene or propylene glycol methyl ether acetate, 0.5-1% of polyether modified polydimethyl siloxane copolymer and 0.5-1% of ultraviolet absorber; and the component B is an aliphatic polyisocyanate curing agent. The double-liquid polyurethane coating of the invention can be sprayed on ABS and ABS+PC plastic materials and widely used in spraying and refinishing paint of automotive trim, and has excellent abrasion resistance, chemical resistance, low temperature film forming, flexibility, decorative performance and weather resistance, etc.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a two-component polyurethane coating Background technique [0002] Polyurethane coatings refer to coatings that use hydroxyacrylic resin as the main film-forming substance. Among the various series of coatings, the composition of hydroxyl acrylic resin coating and HDI polyisocyanate curing agent has particularly superior properties. Such as weather resistance, water resistance, chemical resistance and so on. At present, the widely used hydroxy acrylic resins include high-hydroxyl and low-hydroxyl resins. High-hydroxyl resins have high gloss, good fullness, high hardness, good chemical resistance and water resistance, but poor adhesion to plastic materials. However, low-hydroxyl resins have good adhesion to plastic materials and good weather resistance, while the gloss, hardness, and fullness of the coating film are relatively poor. Contents of the invention [0003] The pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D175/08
Inventor 陈贺生
Owner 东莞大宝化工制品有限公司
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