Patent ID: 6699956
Filing Date: 2004-03-02
Classification: C08F,C08L

Abstract:
A highly dielectric addition type curable composition comprising(A) an organopolysiloxane having the average compositional formula (I): R1aR2bR3cSiO4+a+b+c)/2â€ƒâ€ƒ(I) wherein R1 is a cyanoalkyl group having 3 to 5 carbon atoms, R2 is a monavalent hydrocarbon group of 2 to 6 carbon atoms having an aliphatic unsaturated bond, R3 is a monovalent hydrocarbon group having 1 to 10 carbon atoms other than R1 and R2, letter â€œaâ€  is a number of 0.2 to 0.95, â€œbâ€  is a number of 0.05 to 0.7, â€œcâ€  is a number of 0.5 to 1.0, and a+b+c is 1.05 to 1.9,(B) an organohydrogenpolysiloxane having the average compositional formula (II): R4kR5mR6nSiO(4+k+m+n/2â€ƒâ€ƒ(II) wherein R4 is a cyanoalkyl group having 3 to 5 carbon atoms, R5 is hydrogen, R6 is a monovalent hydrocarbon group having 1 to 10 carbon atoms other than R4, letter â€œkâ€  is a number of 0.2 to 0.7, â€œmâ€  is a number of 0.2 to 0.7, â€œnâ€  is a number of 1.0 to 1.6, and k+m+n is 2.0 to 2.3, and(C) a platinum group metal catalyst.