Patent ID: 7119142

Claim:
A method of manufacturing a conductive liquid silicone rubber composition comprising mixing the following components: (A) a mixture of a conductive filler with a liquid diorganopolysiloxane having two or more silicon-bonded alkenyl groups in one molecule; (B) a mixture of a conductive filler with a liquid diorganopolysiloxane having two or more silicon-bonded alkenyl groups in one molecule and a volume resistivity different from that of (A); (C) a catalytic agent that comprises a platinum-based catalyst; and (D) a cross-linker that comprises an organopolysiloxane having two or more silicon-bonded hydrogen atoms in one molecule; wherein the volume resistivities of components (A) and (B) are in accordance with the following relationship 10≦R a /R b ≦100000, and wherein 10 3 Ohm·cm≦R a ≦10 13 Ohm·cm; 10 2 Ohm·cm ≦R b ≦10 12 Ohm·cm wherein R a is the volume resistivity of a formed article obtained by mixing component (A) with the components (C) and (D) with subsequent thermal curing of the mixture, and wherein R b is the volume resistivity of a formed article obtained by the same method from component (B).