Patent ID: 6670418
Filing Date: 2003-12-30
Classification: C08G,C08L,C09D,D06N

Abstract:
A crosslinkable organopolysiloxane composition which cures to a non-blocking polyorganosiloxane, comprising:(1) an organopolysiloxane having SiC-bonded radicals with aliphatic carbonâ€”carbon multiple bonds, and (2) an organopolysiloxane with Si-bonded hydrogen atoms or, (3) an organopolysiloxane having both SiC-bonded radicals with aliphatic carbonâ€”carbon multiple bonds and Si-bonded hydrogen atoms; (4) a catalyst which promotes the addition of Si-bonded hydrogen onto an aliphatic multiple bond, (5) from 5-50 weight percent of a reinforcing filler having a BET surface area of more than 50 m2/g, and (6) from 10-80 weight percent of a non-reinforcing filler having an average particle diameter of less than 30 &mgr;m and a BET surface area of less than 20 m2/g, wherein the weight ratio of non-reinforcing filler to reinforcing filler is from 12:1 to 4:1, all weight percents based on the total weight of the crosslinkable organopolysiloxane composition.