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High-heat-resistance silica gel and preparation method thereof

A silicone gel, high heat-resistant technology, applied in the field of silicone gel, can solve the problems of affecting transparency, limited improvement of heat resistance, and cracks, etc., to achieve stable application, excellent heat resistance, and excellent electrical insulation Effect

Active Publication Date: 2021-01-15
GUANGZHOU BAIYUN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the methods to improve the heat resistance of silicone gel mainly include adding metal oxides as fillers, using phenyl silicone oils, phenyl heat-resistant agents, etc. Metal oxides will affect transparency and viscosity, while only using phenyl silicone oils, benzene The base heat-resistant agent has limited improvement in heat resistance. For example, patent CN107573696A uses phenyl silicone oil, patent CN110746783A introduces POSS structure, and CN109575873A uses phenyl heat-resistant agent to improve the heat resistance of silicone gel. The tolerance temperature of the gel is generally around 200°C, and the maximum is 220°C, which no longer meets the requirements of higher power IGBTs today. It will harden and crack during use, which will affect the service life of the IGBT.

Method used

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  • High-heat-resistance silica gel and preparation method thereof
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  • High-heat-resistance silica gel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A kind of high heat-resistant silicone gel, its formula is made up of the raw material of following parts by weight:

[0054]

[0055] Among them, the viscosity of the single-ended vinyl silicone oil is 2000cSt, the phenyl content is 3mol%, and the vinyl content is 0.08mmols / g. The structural formula is as follows:

[0056]

[0057] Among them, the double-ended vinyl silicone oil has a viscosity of 1000cSt, a phenyl content of 3mol%, and a vinyl content of 0.16mmols / g. The structural formula is as follows:

[0058]

[0059] Among them, the viscosity of the terminal hydrogen-containing silicone oil is 800cSt, the phenyl content is 7mol%, and the hydrogen content is 0.16mmols / g. The structural formula is as follows:

[0060]

[0061] Among them, the side hydrogen-containing silicone oil has a viscosity of 400cSt, a phenyl content of 5mol%, and a hydrogen content of 3mmols / g. The structural formula is as follows:

[0062]

[0063] Wherein, the inhibitor is ...

Embodiment 2

[0071] A kind of high heat-resistant silicone gel, its formula is made up of the raw material of following parts by weight:

[0072]

[0073] Among them, the viscosity of the single-ended vinyl silicone oil is 2000cSt, the phenyl content is 3mol%, and the vinyl content is 0.08mmols / g. The structural formula is as follows:

[0074]

[0075] Among them, the double-ended vinyl silicone oil has a viscosity of 1000cSt, a phenyl content of 3mol%, and a vinyl content of 0.16mmols / g. The structural formula is as follows:

[0076]

[0077] Among them, the viscosity of the terminal hydrogen-containing silicone oil is 800cSt, the phenyl content is 7mol%, and the hydrogen content is 0.16mmols / g. The structural formula is as follows:

[0078]

[0079] Among them, the side hydrogen-containing silicone oil has a viscosity of 400cSt, a phenyl content of 5mol%, and a hydrogen content of 3mmols / g. The structural formula is as follows:

[0080]

[0081] Wherein, the inhibitor is ...

Embodiment 3

[0089] A kind of high heat-resistant silicone gel, its formula is made up of the raw material of following parts by weight:

[0090]

[0091]

[0092] Among them, the viscosity of the single-ended vinyl silicone oil is 2000cSt, the phenyl content is 3mol%, and the vinyl content is 0.08mmols / g. The structural formula is as follows:

[0093]

[0094] Among them, the double-ended vinyl silicone oil has a viscosity of 1000cSt, a phenyl content of 3mol%, and a vinyl content of 0.16mmols / g. The structural formula is as follows:

[0095]

[0096] Among them, the viscosity of the terminal hydrogen-containing silicone oil is 800cSt, the phenyl content is 7mol%, and the hydrogen content is 0.16mmols / g. The structural formula is as follows:

[0097]

[0098] Among them, the side hydrogen-containing silicone oil has a viscosity of 400cSt, a phenyl content of 5mol%, and a hydrogen content of 3mmols / g. The structural formula is as follows:

[0099]

[0100] Wherein, the i...

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Abstract

The invention relates to high-heat-resistance silica gel and a preparation method thereof. The high-heat-resistance silica gel is prepared from the following raw materials in parts by weight: 0.01-0.5part of a catalyst, 0.01-0.2 part of carboxylate containing vinyl, 80-100 parts of vinyl silicone oil, 1-50 parts of terminal hydrogen-containing silicone oil, 0.1-10 parts of side hydrogen-containing silicone oil and 0.01-1 part of an inhibitor, wherein carboxylate containing vinyl is nickel carboxylate containing vinyl and / or niobium carboxylate containing vinyl. The silica gel can still keep the needle penetration degree not to be reduced, and is not hardened and free of cracks and transparent after being baked at the temperature of 250 DEG C for 1000 hours, has excellent electrical insulating property, and can be stably applied to the field of high-power IGBTs.

Description

technical field [0001] The invention relates to the technical field of silica gel, in particular to a high heat-resistant silica gel and a preparation method thereof. Background technique [0002] With the release of the national "new infrastructure" policy, a 5G era is approaching us at an accelerated pace. In the 5G era, a large number of high-power semiconductor modules will be put into use. Silicone gel, as a crucial packaging material, is subject to increasing attention. Silicone gel is a polymer material obtained by organosiloxane through cross-linking reaction. The special molecular structure endows it with excellent weather resistance, heat resistance, electrical insulation, low stress, low elastic modulus, transparency, and is very Suitable as packaging material for Insulated Gate Bipolar Transistor (IGBT). [0003] The power of semiconductor modules is getting higher and higher, and the heat generated is getting higher and higher, and the requirements for the hea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/12C08F220/06
CPCC08F283/124C08F283/12C08F220/06
Inventor 黄琪刘光华黄文哲陈建军黄恒超
Owner GUANGZHOU BAIYUN CHEM IND
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