Method of protecting electronic or electric part
AssigneeShin-Etsu Chemical Co., Ltd.
InventorsHiroshige Okinoshima, Toshio Shiobara, Tsutomu Kashiwagi
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Abstract
The invention provides a method of protecting an electronic or electric part by coating the part with a silicone rubber composition comprising an organopolysiloxane, an organohydrogenpolysiloxane, an addition reaction catalyst, and a filler. When metal oxide fine particles obtained by deflagration of metal powder dust in an oxygen-containing atmosphere are blended as the filler, the composition has sufficient purity to cover electronic and electric parts and cured products of the composition are improved in electrical properties and heat resistance, thereby protecting the electronic or electric part.
Claims11
A method of protecting an electronic or electric part which comprises
- coating the electronic or electric part with a silicone rubber composition comprising a silicone rubber base and a filler which comprises metal oxide fine particles obtained by deflagration of metal powder dust in an oxygen-containing atmosphere and having a mean particle size of 0.01 to 20 .mu.m, and a specific surface area of 5 to 15 m.sup.2 /g;
- and
- curing the silicone rubber composition to form a protective coat on the electronic or electric part.
Dependencies are inferred from the claim text.