Conductive silicone rubber composition and low-resistance connector

A low-resistance connector comprising a plurality of alternating layers of a conductive elastomer and an insulating elastomer, at least one elastomer being flexible, which are alternately disposed to form a multilayer structure such that their juncture surfaces are parallel to each other,

• each said conductive elastomer layer comprising as a conductive element a cured product of a silicone rubber composition comprising
• (A) 100 parts by weight of an organopolysiloxane having at least two aliphatic unsaturated groups, represented by the following average compositional formula (1):
• R1nSiO(4−n)/2 (1)
• wherein R1 is independently a substituted or unsubstituted monovalent hydrocarbon group and n is a positive number of 1.98 to 2.02,
• (B) 100 to 800 parts by weight of a conductive powder comprising a silver powder premixed with at least 0.2% by weight of fine powder selected from the group consisting of inorganic fillers and spherical organic resins, and
• (C) a sufficient amount to cure component (A) of a curing agent.

A method of preparing a conductive silicone rubber composition comprising mixing:

• (A) 100 parts by weight of an organopolysiloxane having at least two aliphatic unsaturated groups, represented by the following average compositional formula (1):
• R1nSiO(4−n)/2 (1)
• wherein R1 is independently a substituted or unsubstituted monovalent hydrocarbon group and n is a positive number of 1.98 to 2.02;
• (B) 100 to 800 parts by weight of a conductive powder comprising a silver powder and at least 0.2% by weight of a fine powder of an inorganic filler or a spherical organic resin wherein the silver powder is premixed with the fine powder, and thereafter, said conductive powder is mixed with said organopolysiloxane and a curing agent, and
• (C) a sufficient amount of said curing agent to cure said organopolysiloxane.