POLYSILOXANE ELASTOMER COMPOSITION AND DISPENSABLE PRECURSOR THEREFOR

摘要

A dispensable precursor composition for highly filled, thermally conductive elastomers that is adapted to fill deep section mold cavities, which composition is an intimate admixture of a first component comprising an olefinically unsaturated crosslinkable polysiloxane and a second component comprising a silyl hydride functional siloxane which composition comprises: I. 100 parts by weight of the crosslinkable polysiloxane which has a formula: wherein at least most of the Ra's and Rb's are selected from (A) saturated hydrocarbyl or hydrocarbyloxy groups having a total of 1 to about 10 carbon atoms that are alkyl or aryl or alkyl and aryl and (B) allyl or vinyl groups but wherein up to about 25% of the Rb's may be s