Electromagnetic wave absorbing silicone rubber compositions
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsIkuo Sakurai, Akio Suzuki
Life of this patent
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Abstract
A silicone rubber composition comprising a soft magnetic powder, an optional heat conductive powder, and a surface treating agent selected from (a) an organopolysiloxane containing at least one alkoxy radical, hydroxyl radical or functional organic radical in a molecule, (b) a titanate coupling agent, and (c) an aluminum coupling agent is easily workable and flexible and has an ability to absorb electromagnetic waves and optionally, a heat transfer ability. Placement of the composition in an electronic equipment suppresses electromagnetic noise.
Claims17
An electromagnetic wave absorbing silicone rubber composition comprising
- a soft magnetic powder selected from the group consisting of iron and iron alloys in an amount of 5 to 80% by volume of the entire composition,
- a heat conductive powder selected from the group consisting of metals, metal oxides, metal nitrides, and silicon carbide in an amount of 10 to 85% by volume of the entire composition, and
- a surface treating agent in an amount of 0.1 to 10 parts by weight per 100 parts by weight of said soft magnetic powder, said surface treating agent being selected from the group consisting of (a) an organopolysiloxane containing at least one silicon atom-bonded alkoxy radical, silicon atom-bonded hydroxyl radicals or functional organic radical in a molecule, (b) a titanate coupling agent, and (c) an aluminum coupling agent.
Dependencies are inferred from the claim text.