Patent ID: 6639008
Filing Date: 2003-10-28
Classification: C08K,C09D

Abstract:
A silicone composition comprising a curable adhesive formulation which comprises(A) a functional polydiorganosiloxane having the general formula: (R1)3-p(R2)pSiO[(R1)2SiO]m[R1R2SiO]nSi(R1)3-qR2q wherein R2 is independently, at each occurrence, a vinylcyclohexeneoxy-functional group, a silane-functional group, an epoxy-functional group, a glycidoxy-functional group, an acryoxy-functional group, an imide-functional group, a urethane-functional group, vinyl or combinations thereof; R1 is independently, at each occurance, a C1-8 alkyl radical, a phenyl radical, a vinyl radical or combinations thereof â€œpâ€  is 0 or 1; â€œqâ€  is 0 or 1; â€œmâ€ +â€œnâ€  has a value sufficient to provide a polydiorganosiloxane with an initial viscosity in a range of between about 100 centipoise and about 50,000 centipoise at 25Â° C.;(B) at least one reactive diluant present in a concentration at least about equal to the concentration of component (A); (C) at least one cure catalyst; and (D) at least one thermally conductive filler present in a concentration in a range of between about 60% by weight and about 95% by weight, based on the total weight of the silicone composition; wherein the total silicone composition has a viscosity in a range of between about 10,000 centipoise and about 25,000 centipoise at 25Â° C. before cure and a thermal conductivity greater than about 1.5 W/mK after cure.