Particulate material comprising a platinum-containing...

Details Particulate material comprising a platinum-containing... Particulate material comprising a platinum-containing...

C - Chemistry, Metallurgy

08

L

400/7215, 252/91

C08L 83/04 (2006.01) C08J 3/07 (2006.01) C08J 3/12 (2006.01) C08J 3/16 (2006.01) C08K 9/10 (2006.01)

Patent

CA 1335730

This invention provides a platinum-containing hydrosilylation catalyst in particulate form with an average particle size not exceeding 100 micrometers. The particles also contain a silicone resin having a softening point of from 50 to 200 degrees Centigrade. The improvement resides in the presence of a surface layer in said particles that is essentially free of the platinum-containing catalyst. As a consequence of this structure, when the catalyst composition is used as the curing catalyst in a hydrosilylation-curing organopolysiloxane composition, the composition characteristically exhibits an excellent storage stability while still curing rapidly upon heating.

603581

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