Silicone gel composition

一种硅氧烷凝胶、组合物的技术，应用在硅氧烷凝胶固化产品领域，能够解决丧失硅氧烷凝胶固化产品低应力特性等问题，达到低应力、低弹性模量、没有污染的效果
CN1696202AInactive Publication Date: 2005-11-16SHIN ETSU CHEM CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHIN ETSU CHEM CO LTD
Publication Date
2005-11-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

Provided is a silicone gel composition including (A) an organopolysiloxane containing at least one alkenyl group bonded to a silicon atom within each molecule, represented by an average composition formula: Ra R1b SiO(4-a-b) / 2 (wherein, each R group represents, independently, an alkenyl group, each R1 group represents, independently, an unsubstituted or substituted monovalent hydrocarbon group that contains no aliphatic unsaturated bonds, a represents a positive number from 0.0001 to 0.2, b represents a positive number from 1.7 to 2.2, and a+b represents a number within a range from 1.9 to 2.4), (B) an organohydrogenpolysiloxane containing at least two hydrogen atoms bonded to silicon atoms within each molecule, and (C) a platinum-based catalyst. Also provided is the silicone gel composition stated above, in which a penetration value of a cured product of this composition, as defined in JIS K2220, is within a range from 20 to 200. The silicone gel composition generates a silicone gel cured product which displays a low elastic modulus and low stress, and suffers no oil bleeding over time.
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Description

technical field

[0001] The present invention relates to a silicone gel composition which results in a silicone gel cured product which does not bleed oil over time. Background technique

[0002] The silicone gel composition is an addition reaction curable organopolysiloxane composition comprising an organohydrogenpolysiloxane containing silicon atom-bonded hydrogen atoms (i.e., SiH groups), an organohydrogenpolysiloxane containing Alkenyl, such as silicon-bonded vinyl organopolysiloxanes, and platinum-based catalysts, these compositions produce a cured product by the addition of silicon-bonded hydrogen atoms to alkenyl groups. The silicone gel cured product prepared by heating and curing the silicone gel composition exhibits excellent heat resistance, weather resistance, oil resistance, cold resistance and electrical insulation, and also exhibits low elastic modulus values ​​and Low stress level, therefore, they are widely used in the protection of electronic components, su...

Claims

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