Patent ID: 7208548

Claim:
A rubber composition for constructional gasket, comprising: 5 to 100 parts by weight of an ethylene/α-olefin/non-conjugated polyene random copolymer rubber (A) having constituent units derived from at least one kind of a vinyl end group-containing norbornene compound represented by the following formula (I), said norbornene compound being the non-conjugated polyene, 0 to 95 parts by weight of an organopolysiloxane (I) represented by the following average composition formula (1), a SiH group-containing compound (B1) having at least two SiH groups in one molecule in such an amount as gives 0.2 to 5 hydrogen atoms bonded to silicon atoms based on one aliphatic unsaturated bond in the component (A) and the component (I), and a platinum group metal catalyst (E1) in a catalytic amount, with the proviso that the total amount of the component (A) and the component (I) is 100 parts by weight; wherein n is an integer of 0 to 10, R 1 is a hydrogen atom or an alkyl group of 1 to 10 carbon atoms, and R 2 is a hydrogen atom or an alkyl group of 1 to 5 carbon atoms; R 1 n SiO (4-n)/2 (1) wherein R 1 is an unsubstituted or substituted mono-valent hydrocarbon group, and n is a positive number of 1.95 to 2.05.