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A coating for zero-degree silica gel and preparation method thereof

A coating and silica gel technology, applied in anti-corrosion coatings, coatings and other directions, can solve the problems affecting the fastness of the coating, the dull appearance of the coating, and the peeling of the coating, so as to increase the smoothness of the hand, the delicate and uniform appearance, Good layer adhesion

Active Publication Date: 2021-03-30
HUNAN SOKAN NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional silicone coatings need to add a certain amount of silica as a matting agent, which is easily absorbed by the silicone oil precipitated on the surface of zero-degree silicone products, so that the coating loses its dull appearance, and seriously affects the feel and fastness of the coating. , easy to cause coating peeling off

Method used

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  • A coating for zero-degree silica gel and preparation method thereof
  • A coating for zero-degree silica gel and preparation method thereof
  • A coating for zero-degree silica gel and preparation method thereof

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Embodiment approach

[0024] Among them, the methyl vinyl polysiloxane is the main film-forming substance, methyl hydrogen-containing silicone oil and methylphenyl vinyl polysiloxane are auxiliary film-forming substances, and the combination of the three can improve the white carbon black powder. It can improve the adhesion between the coating and the zero-degree silicone substrate, and enhance the flexibility of the coating film. In order to better achieve the above effects, the number average molecular weight of methyl vinyl polysiloxane is preferably 50,000 to 200,000, more preferably 100,000 to 150,000, and the vinyl content is preferably 0.1 to 0.3%, more preferably 0.1 to 100,000. 0.2%; the hydrogen content of methyl hydrogen-containing silicone oil is 0.5-1.5%, more preferably 0.5-1%; the molecular weight of methyl phenyl vinyl polysiloxane is 50,000-200,000, more preferably 10-20 Ten thousand. As an embodiment of the present invention, the methyl vinyl polysiloxane can be TSE221 or TSE260 ...

Embodiment 1-5

[0040] The paint preparation method is as follows:

[0041] (1) Weigh the raw materials according to the formula in Table 1, add methyl vinyl polysiloxane, methyl phenyl vinyl polysiloxane, methyl hydrogen-containing silicone oil, and organic solvent into the dispersion container, Stir for 5 to 10 minutes at rpm, then slowly add white carbon black TS-100 and R972 under stirring, stir at 1200 to 2000 rpm for 20 to 30 minutes, and finally add the inhibitor methylpentynol and silane coupling agent, stirring at 400-800 rpm for 5-10 minutes.

[0042] (2) Grind the mixture 2-3 times with a three-roll machine to make the coating fineness <15 μm.

[0043] (3) Add a metal catalyst to the mixture obtained in step (2), and stir at 100-300 rpm for 5-6 minutes to obtain a coating product.

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Abstract

The invention discloses a coating for zero-degree silica gel and a preparation method thereof, and the coating for the zero-degree silica gel comprises the following components in parts by weight: 20-40 parts of methyl vinyl polysiloxane, 5-10 parts of methyl hydrogen-containing silicone oil, 3-7 parts by weight of methyl phenyl vinyl polysiloxane, 0.2-2 parts of an inhibitor, 0.2-2 parts of a siloxane coupling agent, 8-20 parts of white carbon black, 30-50 parts of an organic solvent and 1-5 parts by weight of a metal catalyst. When the coating is applied to the surface of a zero-degree silica gel product, the matte effect and the silky hand feeling can be realized, and the coating has excellent adhesive force, heat resistance, water resistance, corrosion resistance, friction resistance and UV aging resistance.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a coating for zero-degree silica gel and a preparation method thereof. Background technique [0002] Silicone products with a Shore hardness below 20A can be called zero-degree silicone products. This product has excellent softness and elasticity, is non-toxic and environmentally friendly, and feels delicate and soft like a baby's skin. Zero-degree silicone products are widely used in sports protective equipment such as knee pads and wrist pads, as well as simulation toys, medical teaching, medical equipment and other fields. [0003] Due to the addition of excessive silicone oil, the surface of zero-degree silicone products has a slightly astringent feel and is prone to oil separation, which hinders the large-scale promotion and use of zero-degree silicone products. To solve this problem, a layer of paint can be applied on the zero-degree silicone product to make it have a del...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/07C09D183/05C09D5/08C09D7/61C09D7/63
Inventor 潘峰李平王卫国缪培凯吕国强杨波符饶生凌云剑伍松
Owner HUNAN SOKAN NEW MATERIAL
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