RUBBER COMPOSITION, CROSSLINKED OBJECT AND FOAMED OBJECT MADE FROM THE COMPOSITION, MOLDED RUBBER MADE FROM THE COMPOSITION, AND USES OF THESE

摘要

A molding excellent in various properties and a rubber composition for forming the molding are provided by improving compatibility between an ethylene/a-olefin/unconjugated polyene copolymer and a polyolefin resin. Also provided is a molding formed from the rubber composition. This molding is reduced in fogging and tackiness and excellent in mechanical strength and unsusceptibility to thermal deterioration. The rubber composition comprises: an ethylene/a-olefin/unconjugated polyene copolymer (A); and a polyolefin resin (B) having an Mn of 10,000 or higher and/or an ethylene/a-olefin copolymer (C) having an Mn of 2,500-5,000. In the rubber composition, (1) the ingredient (A) has ethylene distribution parameters (P) whose maximum value and minimum value satisfy the relationship Pmax/Pmin=1.4; and (2) the ingredient (C) has a B value ([EX]/(2[E]x[X])) of 1.05 or less ([E] and [X] indicate molar ethylene content and molar a-olefin content, respectively, and [EX] indicates the content of ethylene/C3-20 a-olefin diad chains).