CONDUCTIVE SPONGE-FORMING SILICONE RUBBER COMPOSITION AND CONDUCTIVE SILICONE RUBBER SPONGE

摘要

A conductive sponge-forming liquid silicone rubber composition comprises: (A) an alkenyl group-containing polydiorganosiloxane; (B) a polyorganosiloxane having at least two silicon-bonded hydrogen atoms in a molecule; (C) a conductive filler; (D) a mixture of water and an inorganic thickener; (E) an emulsifier; (F) a hydrosilylation reaction catalyst; and (G) a curing retarder. A conductive silicone sponge can be obtained by crosslinking and curing the conductive sponge-forming liquid silicone rubber. The conductive silicone rubber sponge generally has fine, uniform continuous porosity and electrical resistance with low voltage dependence.

主权项

1. A conductive sponge-forming liquid silicone rubber composition comprising:
(A) 100 parts by mass of an alkenyl group-containing polydiorganosiloxane composed of;
(A1) from 0 to 90 parts by mass of a polydiorganosiloxane having both molecular terminals capped with alkenyl groups and not having any alkenyl groups in molecular side chains, and(A2) from 10 to 100 parts by mass of a polydiorganosiloxane having two or more alkenyl groups in molecular side chains; (B) a polyorganosiloxane having at least two silicon-bonded hydrogen atoms in a molecule, in an amount such that the number of moles of silicon-bonded hydrogen atoms in component (B) is from 0.4 to 20 per 1 mole of alkenyl groups in component (A); (C) from 1 to 100 parts by mass of a conductive filler; (D) from 10 to 250 parts by mass of a mixture comprising water and an inorganic thickener; (E) from 0.1 to 15 parts by mass of an emulsifier; (F) a hydrosilylation reaction catalyst, in an amount sufficient for crosslinking the composition; and (G) from 0.001 to 5 parts by mass of a curing retarder.