C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 77/20 (2006.01) C08G 77/24 (2006.01) C08K 9/06 (2006.01) C08L 83/04 (2006.01) C08L 83/07 (2006.01) C08L 83/08 (2006.01)
Patent
CA 2055957
Docket No.: 60SI-1384 Abstract of the Invention A composition is provided for treating silica filler in-situ, comprising a silanol-terminated, vinyl-containing polydiorganosiloxane having the general formula: Image wherein R is a monovalent substituted or unsubstituted hydrocarbon radical; R1 is R or a halogenated alkyl radical; R2 is R or a halogenated alkyl radical; "a" is a number in the range of from about 1 to about 30; "b" is a number in the range of from 0 to about 50; and"c" is a number in the range of from 4 to about 30; the vinyl content of the polydiorganosiloxane being in the range of from about 1 to about 20% by weight and the silanol content being in the range of from about 0.1 to about 6% by weight. Preferably, R and R1 are methyl, R2 is methyl or 3,3,3-trifluoropropyl, and b is 0. The invention is further directed to a method for treating silica filler with the treating composition above and to silicone elastomeric compositions containing filler treated with the treating composition.
Doin James E.
Evans Edwin R.
Company General Electric
Craig Wilson And Company
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