PARTICULATE MATERIAL COMPRISING A PLATINUM-CONTAINING HYDROSILYLATION CATALYST AND A DIORGANOPOLYSILANE

摘要

This invention provides particulate catalyst compositions comprising a platinum-containing hydrosilation reaction catalyst and a polydiorganosilane exhibiting a softening point of from 50 to 200.degree.C. The average particle size of the particulate does not exceed 100 micrometers, and the surface layer of the particulate is substantially free of said catalyst. Curable organopolysiloxane compositions containing the present catalyst compositions exhibit excellent storage stability.