公开(公告)号：EP0842979A1

公开(公告)日：1998-05-20

申请号：EP97119998.9

申请日：1997-11-14

申请人： Mitsui Chemicals, Inc.

发明人： Kawasaki, Masaaki ,  Nonaka, Shuichi ,  Kunizane, Masao ,  Koda, Taku ,  Tojo, Tetsuo

IPC分类号： C08L23/16

CPC分类号： C08L23/16 ,  C08K3/06 ,  C08K5/09 ,  C08K5/20 ,  C08K5/39 ,  C08K5/47 ,  C08L23/20 ,  C08L91/00 ,  C08L2203/14 ,  C08L2205/02 ,  C08L2205/025 ,  C08L2312/00 ,  C08L2666/04

摘要： Disclosed is a foam processable rubber composition which comprises an ethylene/α-olefin of 3 to 20 carbon atoms/non-conjugated polyene copolymer rubber (A), a crystalline polyolefin resin (B) having a melting point of 100 to 150 °C and a foaming agent (C), in specific proportions. The copolymer rubber (A) has an ethylene/α-olefin molar ratio of 60/40 to 80/20, an intrinsic viscosity (η), as measured in decalin at 135 °C, of 0.7 to 2 dl/g, and an iodine value of 10 to 50. A vulcanized rubber foam-molded product can be obtained by vulcanizing and foaming the rubber composition. The rubber composition can provide vulcanized rubber foam-molded products having excellent vulcanization properties such as weathering resistance, heat resistance, ozone resistance and tear strength. Besides, the rubber composition exhibits excellent precision moldability and productivity of vulcanized rubber foam-molded products in transfer molding, injection molding and cast molding.

摘要翻译： 公开了一种可发泡加工的橡胶组合物，其包含3至20个碳原子的乙烯/α-烯烃/非共轭多烯共聚物橡胶（A），熔点为100至150℃的结晶聚烯烃树脂（B） 发泡剂（C）。 共聚物橡胶（A）的乙烯/α-烯烃摩尔比为60/40〜80/20，在135℃的萘烷中测定的特性粘度（η）为0.7〜2d / g， 碘值为10〜50。硫化橡胶发泡成型体可以通过硫化和发泡橡胶组合物得到。 橡胶组合物可以提供具有优异的硫化性能如耐候性，耐热性，耐臭氧性和撕裂强度的硫化橡胶发泡成型产品。 此外，橡胶组合物在传递成型，注射成型和铸造成型中表现出优异的成型性和硫化橡胶发泡成型体的生产率。