Patent ID: 6884314

Claim:
A curable conductive composition of comprising: (a) a reactive polyorganosiloxane component; (b) a silicone resin formed as a hydrolysis and condensation product of at least one silane within the formula R 1 m R 2 p Si(X) 4-(m+p) , wherein R 1 and R 2 may be the same or different and may be selected from the group consisting of monovalent ethylenically unsaturated radicals, C 1-12 alkoxy, C 6-12 aryloxy, (meth)acrylate, hydrogen, C 1-12 alkyl, C 6-12 aryl, C 7-18 arylalkyl, and C 7-18 alkylaryl, X is a hydrolyzable functionality, m is an integer from 1 to 3, and m+p is an integer from 1 to 3 provided at least one of R 1 and R 2 is a member selected from the group consisting of monovalent ethylenlcally unsaturated radicals, C 1-12 alkoxy, C 6-12 aryloxy, (meth)acrylate hydrogen; and (c) a conductive filler component, wherein the composition demonstrates an improved initial adhesion to a substrate with which it is to be used of at least about 7%; and wherein the conductive filler component comprises: (i) a first conductive filler and (ii) a second conductive filler, wherein the first conductivc filler is relatively harder than the second conductive filler using a Mohs hardness test, wherein the composition is subjected to shear mixing forces which shearingly disperse the first and second conductive fillers throughout the composition so as to provide a volume fraction of conductive filler throughout the resinous material in the range of about 30 to about 65% by volume of the composition.