Electroconductive silocone rubber composition containing a metal

Claim 1

An electroconductive silicone rubber composition which comprises, as a blend: (a) 100 parts by weight of a diorganopolysiloxane represented by the average unit formula R 1 n SiO.sub.(4-n)/2, in which R 1 is an unsubstituted or substituted monovalent hydrocarbon group and the subscript n is a positive number in the range from 1.95 to 2.05; (b) from 5 to 100 parts by weight of spherical particles of a cured silicone elastomer having an average particle diameter in the range from 0.1 to 50 μm; (c) from 100 to 1200 parts by weight of a metallic electroconductivity-imparting agent; (d) a curing agent of a silicone rubber in an amount sufficient to cure the composition; and (e) 0.1 to 20 parts by weight of a liquid organosilicon compound represented by the average unit formula R 2 a R 3 b X c SiO.sub.(4-a-b-c)/2, in which R 2 is a mehtyl group or a lower alkenyl group, R 3 is a phenyl group or an unsubstituted or substituted alkyl group having from 3 to 10 carbon atoms, X is a hydrogen atom, hydroxy group or hydrolyzable group, the subscripts a and c are each zero or a positive number smaller than 4 and the subscript b is a positive number not exceeding 4 with the proviso that a+b+c is in the range from 2 to 4.