Silicone composition capable of yeilding a cured product having

Details Silicone composition capable of yeilding a cured product having Silicone composition capable of yeilding a cured product having

1995-03-21

1996-06-25

Bleutge, John C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

524862, C08K 310, C08L 8304

Patent

active

055300600

ABSTRACT:
A silicone composition is of the addition reaction type which comprises a vinyl group-containing organopolysiloxane, an organohydrogenpolysiloxane which has at least one hydrogen atom joined to a silicon atom in one molecule, a platinum group metal catalyst, and an aluminum oxide powder which is substantially round or spherical in shape with an average particle size of not larger than 50 .mu.m and wherein when the aluminum oxide powder is subjected to extraction of alkali metal ions and halogen ions under conditions of 121.degree. C., 2 atmospheric pressures, 100% R.H. and 20 hours, the contents of both ions are, respectively, not larger than 5 ppm. The cured product obtained from the composition has high thermal conductivity and the composition is useful as a sealant of electric and electronic parts and can prevent the parts from being corroded.

REFERENCES:
patent: 3844992 (1974-10-01), Antonen
patent: 4072635 (1978-02-01), Jeram
patent: 4801642 (1989-01-01), Janik et al.
patent: 5008307 (1991-04-01), Inomata
patent: 5023291 (1991-06-01), Sakamoto et al.

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