| abstract |
Disclosed is a foam processable rubber compositionnwhich comprises an ethylene/α-olefin of 3 to 20 carbonnatoms/non-conjugated polyene copolymer rubber (A), ancrystalline polyolefin resin (B) having a melting point ofn100 to 150 °C and a foaming agent (C), in specificnproportions. The copolymer rubber (A) has an ethylene/α-olefinnmolar ratio of 60/40 to 80/20, an intrinsicnviscosity (η), as measured in decalin at 135 °C, of 0.7 ton2 dl/g, and an iodine value of 10 to 50. A vulcanizednrubber foam-molded product can be obtained by vulcanizingnand foaming the rubber composition. The rubber compositionncan provide vulcanized rubber foam-molded products havingnexcellent vulcanization properties such as weatheringnresistance, heat resistance, ozone resistance and tearnstrength. Besides, the rubber composition exhibitsnexcellent precision moldability and productivity ofnvulcanized rubber foam-molded products in transfer molding,ninjection molding and cast molding. |