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Silicone gel and preparation method thereof

An organosilicon and gel technology, applied in the field of organosilicon gel and its preparation, can solve problems such as fracture, influence on the light transmittance of the gel, influence on the light transmittance of the gel, etc.

Active Publication Date: 2019-10-08
HANGZHOU ZHIJIANG NEW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods all directly use vinyl silicone oil and hydrogen-containing crosslinking agent to directly react. The viscosity of the vinyl used is basically below 10000mPa·s. Although the obtained gel is very soft, the silicone chain in the vinyl silicone oil The segment is not long enough, so the gel's elasticity is too poor, and it will break under a small deformation when pulled by an external force; in addition, adding MT, MQ resin and tackifier to the silicone gel can improve the gel to a certain extent. Adhesion between the glue and the substrate, but it will affect the light transmission properties of the gel, especially silicone resins with different refractive indices, such as phenyl-containing silicone resin (refractive index 1.51) and phenyl-free vinyl silicone oil ( Refractive index 1.41) Mixing will affect the light transmittance; the tackifier contains alkoxy groups, which will release small molecules such as methanol and ethanol, which will also affect the light transmittance of the gel
These problems have limited the application of silica gel in the field of optics

Method used

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  • Silicone gel and preparation method thereof
  • Silicone gel and preparation method thereof
  • Silicone gel and preparation method thereof

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preparation example Construction

[0049] The application also provides a preparation method of the silicone gel, comprising the following steps:

[0050] Mix vinyl silicone oil, terminal hydrogen-containing silicone oil, hydrogen-containing silicone oil and inhibitor to obtain component A;

[0051] Mix vinyl silicone oil and platinum catalyst to obtain component B;

[0052] The component A and the component B are mixed and cured to obtain a silicone gel.

[0053] The above-mentioned curing process is a curing process well known to those skilled in the art, and the present application has no particular limitation on this.

[0054] This application uses hydrogen-containing chain extenders and hydrogen-containing cross-linking agents to increase the softness and elasticity of the gel, and at the same time cooperates with an extremely low amount of platinum catalyst to obtain a gel with good light transmittance and excellent anti-yellowing performance. Silicone gel, this kind of silicone gel can be used in optic...

Embodiment 1

[0057] Mix polydimethylsiloxane with vinyl groups at both ends, hydrogen-terminated silicone oil, hydrogen-containing silicone oil and inhibitor according to the proportion to obtain component A;

[0058] Mix polydimethylsiloxane with vinyl groups at both ends and platinum catalyst according to the ratio to obtain component B;

[0059] Mix components A and B at a weight ratio of 1:1 to obtain a silicone gel after being uniformly cured.

[0060] Table 1 is the content data table of components A and B; the performance of the above-mentioned organosilicon gel is tested, and the results are shown in Table 8;

[0061] The component content data table of the organosilicon gel that table 1 embodiment 1 prepares

[0062]

[0063]

Embodiment 2

[0065] Mix polydimethylsiloxane with vinyl groups at both ends, hydrogen-terminated silicone oil, hydrogen-containing silicone oil and inhibitor according to the proportion to obtain component A.

[0066] Mix the polydimethylsiloxane with vinyl groups at both ends and the platinum catalyst according to the ratio to obtain component B.

[0067] Mix components A and B at a weight ratio of 1:1 to obtain silicone gel after uniform curing.

[0068] Table 2 is the content data table of components A and B; the performance of the above-mentioned organosilicon gel is tested, and the results are shown in Table 2;

[0069] The component content data table of table 2 embodiment 2

[0070]

[0071]

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Abstract

The invention provides silicone gel. The silicone gel is prepared from, in parts by weight, a component A and a component B, wherein the component A comprises 0.1-100 parts of vinyl silicone oil, 0.1-100 parts of hydrogen-terminated silicone oil, 0.1-30 parts of hydrogen-containing silicone oil and 0-1 part of an inhibitor, and the component B includes 100 parts of vinyl silicone oil and 0.0001-0.5 part of a platinum catalyst. The invention also provides a preparation method of the silicone gel. The provided silicone gel has good light transmittance and excellent anti-yellowing properties, thesilicone gel can be used in the optical field, and can also be applied to potting protection of multiple electronic products, meanwhile, the production process of the product is simple, and only thecomponent A and the component B are mixed uniformly at a ratio.

Description

technical field [0001] The invention relates to the technical field of gels, in particular to a silicone gel and a preparation method thereof. Background technique [0002] Silicone gel is a very soft silicone rubber product after curing. It has the characteristics of high and low temperature resistance, weather resistance and physiological inertia of silicone rubber. The curing principle of silicone gel is silicon hydrosilicon addition reaction. After curing, small molecules will not be released, and the volume will not shrink. The curing speed is only related to temperature. It can be cured at room temperature or heated. It is easy to use and is used in electronic appliances, IGBT, display and medical fields have been widely used. [0003] Silicone gel should have a very low viscosity when used to facilitate flow filling, and at the same time it should be very soft after curing to reduce the stress on electronic components when deformation occurs. Therefore, many methods...

Claims

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Application Information

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IPC IPC(8): C08L83/05C08L83/07C08L83/10C08G77/44
CPCC08G77/44C08L83/04C08L2201/08C08L2205/025C08L2205/035C08L83/10
Inventor 郝开强陈丹王聪伟陶小乐何永富
Owner HANGZHOU ZHIJIANG NEW MATERIAL CO LTD
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