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Coating for surface of silicone rubber substrate and preparation method thereof

A coating and silicone technology, which is applied in the field of coatings and surface engineering, can solve the problems of poor coating adhesion and resistance performance defects, and achieve the effects of low volatile organic compound content, easy operation and high adhesion

Active Publication Date: 2021-11-05
HUNAN AEROSPACE SANFENG SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the reason of the silicone rubber substrate itself, general coatings have poor adhesion on its surface. At present, most people improve the adhesion effect by pre-treating the substrate, physical blending, chemical modification, etc.
Most of the chemical modification is to use silicone modified polyurethane resin to prepare one-component coatings. Although the adhesion effect of such coatings is improved, there are certain defects in other resistance properties.

Method used

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  • Coating for surface of silicone rubber substrate and preparation method thereof
  • Coating for surface of silicone rubber substrate and preparation method thereof
  • Coating for surface of silicone rubber substrate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In the present embodiment, the preparation method for the coating on the surface of the silicone rubber substrate is as follows:

[0034] (1) Silicone modified polyaspartate resin

[0035] a. In parts by weight, add 90 parts of aminomethylsilane to the reagent bottle, start stirring, control the temperature at 40°C, slowly add 87 parts of diethyl maleate, and heat up to 60 ℃ heat preservation reaction for 12 hours, after passing the test, discharge to obtain resin a;

[0036] b. In parts by weight, add 115 parts of HDI trimer N3390 into the reagent bottle, start stirring, control the temperature at 40°C, slowly add 120 parts of the above-mentioned resin a, raise the temperature to 60°C for 2 hours, and obtain a prepolymer body;

[0037] c. In parts by weight, add 500 parts of polyaspartate resin NH1520 into the reagent bottle, start stirring, control the temperature at 25°C, slowly add 150 parts of prepolymer, raise the temperature to 65°C for 3 hours, A silicone-mod...

Embodiment 2

[0046] In the present embodiment, the preparation method for the coating on the surface of the silicone rubber substrate is as follows:

[0047] (1) Preparation of Silicone Modified Polyaspartic Ester Resin

[0048] a. In parts by weight, add 90 parts of aminomethylsilane to the reagent bottle, start stirring, control the temperature at 40°C, slowly add 87 parts of diethyl maleate, and heat up to 60 ℃ heat preservation reaction for 12 hours, after passing the test, discharge to obtain resin a;

[0049] b. In parts by weight, add 120 parts of HDI trimer N3390 into the reagent bottle, start stirring, control the temperature at 40°C, slowly add 110 parts of the above resin a, raise the temperature to 60°C and react for 2 hours to obtain a prepolymer body;

[0050] c. In parts by weight, add 500 parts of polyaspartate resin NH1520 into the reagent bottle, start stirring, control the temperature at 25°C, slowly add 150 parts of prepolymer, raise the temperature to 65°C for 3 hour...

Embodiment 3

[0059] In the present embodiment, the preparation method for the coating on the surface of the silicone rubber substrate is as follows:

[0060] (1) Silicone modified polyaspartate resin

[0061] a. In parts by weight, add 90 parts of aminomethylsilane to the reagent bottle, start stirring, control the temperature at 40°C, slowly add 87 parts of diethyl maleate, and heat up to 60 ℃ heat preservation reaction for 12 hours, after passing the test, discharge to obtain resin a;

[0062] b. In parts by weight, add 125 parts of HDI trimer N3390 into the reagent bottle, start stirring, control the temperature at 40°C, slowly add 100 parts of the above resin a, raise the temperature to 60°C and react for 2 hours to obtain a prepolymer body;

[0063] c. In parts by weight, add 500 parts of polyaspartate resin NH1520 into the reagent bottle, start stirring, control the temperature at 25°C, slowly add 150 parts of prepolymer, raise the temperature to 65°C for 3 hours, A silicone-modif...

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Abstract

The invention relates to a coating for the surface of a silicone rubber substrate and a preparation method thereof. It consists of a component A and a component B. In parts by weight, the component A is composed of silicone-modified polyaspartic acid ester resin 30 ~55 parts, antirust filler 30~45 parts, functional additive 0.5~2 parts, diluent 3~6 parts; the B component is isocyanate curing agent. The coating used for the silicone rubber substrate of the present invention is an environment-friendly product, has high solid content, has high adhesion on the surface of the silicone rubber substrate, and has an accelerated aging resistance of up to 3000 hours without pulverization, cracking, and peeling, and can be cured at room temperature. It has the advantages of high cross-linking density, easy construction, etc., and excellent comprehensive performance. It has a wide range of potential applications in the fields of silicone rubber surface decoration and other fields.

Description

technical field [0001] The invention relates to a coating used on the surface of a silicone rubber substrate and a preparation method thereof, belonging to the field of surface engineering, in particular to the technical field of coatings. Background technique [0002] Silicone rubber is an extremely commonly used elastomer, and is widely used to make buttons for mobile phones, calculators, remote controls, etc. However, due to the low surface energy of silicone rubber, the adhesion and adhesion of general coatings on its surface are poor. , It is easy to fall off. At the same time, with the development of surface decoration technology, the surface decoration effect not only requires beautiful appearance, but also requires a certain degree of wear resistance. As the third-generation polyurea material, polyaspartic acid ester resin has surface leveling, good decorative effect, good adhesion to the substrate, elasticity, good wear resistance, and touch feeling. , long-lasting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D179/08C09D175/04C08G18/61
CPCC08G18/615C08K2003/2241C09D179/08C08L75/04C08K13/02C08K3/22C08K3/04C08K3/34
Inventor 杨艺聪何禄文张刚李著初王道鹏
Owner HUNAN AEROSPACE SANFENG SCI & TECH CO LTD
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