Patent ID: 7659328

Claim:
A composition, comprising: a silicone; and one or more silanized, structure-modified, pyrogenic silicas; wherein: the one or more silanized, structure-modified, pyrogenic silicas comprise at least one of dimethylsilyl and monomethylsilyl groups fixed on a surface of the silicas; the one or more silanized, structure-modified, pyrogenic silicas are prepared by: flame-hydrolyzing one or more vaporizable silicon compounds to obtain a pyrogenic silica; treating the pyrogenic silica with at least one member selected from the group consisting of dimethylchlorosilane and monomethyltrichlorosilane to obtain a silanized, pyrogenic silica; and structure-modifying the silanized, pyrogenic silica to obtain the silanized, structure-modified, pyrogenic silica; the one or more silanized, structure-modified, pyrogenic silicas are present in the composition in an amount of at least 40% by weight based on a total weight of the composition; and the silicone is a polydimethylsiloxane having a molecular weight of from 400,000 to 600,000.