Electro-responsive elastomeric material

An electro-responsive elastomeric material comprising

• (A) an electrically insulating polymer having a modulus of elasticity of 10.sup.5 to 10.sup.9 dyne/cm.sup.2, and
• (B) a fine powder dispersed in said polymer, which fine powder electrically polarizes under an electric field independent of water and has a mean particle size of 0.5 to 500 .mu.m, said powder being at least one member selected from the group consisting of
• (1) a fine carbonaceous powder having a carbon-to-hydrogen atomic ratio of from 1.2 to 5,
• (2) minute particulate-dispersing composite particles having minute particulates of an insulating material of about 1 nm to about 1 .mu.m dispersed in a matrix phase of a carbonaceous or carbide material,
• (3) minute particulate-dispersing composite particles having minute particulates of a carbonaceous or carbide material of about 1 nm to about 1 .mu.m dispersed in a matrix phase of an insulating material, and
• (4) a fine composite powder of a stratum clay mineral having a two dimensional stratum structure with a carbonaceous or carbide material incorporated between the strata.