Patent ID: 7816432

Claim:
A hydrothermally resistant electroconductive cured product which has a Tg of 160° C. or more, a bending strength of 30 MPa or more in accordance with JIS K 6911, and a volume resistivity of 2×10 −2 Ωcm or less, obtained by curing a curable composition consisting of: (A) a hydrocarbon compound having a plurality of carbon-carbon double bonds, (B) an electroconductive carbonaceous material selected from the group consisting of, or a combination of at least two kinds of: natural graphite, artificial graphite, expanded graphite, carbon fiber, vapor-phase grown carbon fiber, and carbon nanotube, and (C) at least one curing initiator selected from the group consisting of organic peroxides and azo compounds, wherein the hydrocarbon compound (A) having a plurality of carbon-carbon double bonds is a polymer wherein the ratio of a monomer unit having a side-chain containing a carbon-carbon double bond and saturated main chain is 60 mole % or more, based on the total number of monomer units constituting the polymer, and wherein the hydrocarbon compound (A) having a plurality of carbon-carbon double bonds is at least one kind selected from the group consisting of 1,2-polybutadiene and 3,4-polyisoprene, and wherein the mass ratio of the hydrocarbon compound having a plurality of carbon-carbon double bond as the component (A) and the electroconductive carbonaceous material as the component (B) is 0.01:1 to 1.5:1.