C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
C08F 210/18 (2006.01) B60C 1/00 (2006.01) C08F 236/02 (2006.01) C08J 3/215 (2006.01) C08K 3/06 (2006.01) C08L 23/16 (2006.01)
Patent
CA 2042607
Disclosed is an ethylene-propylene-diene (EPDM) rubber containing sulfur dispersed therein. The rubber has been heat treated at a temperature of 90 to 160°C while kneading to such an extent that the EPDM is only partially crosslinked. The EPDM preferably has a Mooney viscosity ML1+4 (100°C) of 60 to 120 and is a mixture of: (A) 90 to 40% by weight of a high-molecular weight ethylene-propylene-diene copolymer rubber having an ethylene content of 60 to 82 mol%, an intrinsic viscosity [?] of 3.0 to 5.0 dl/g as measured at 135°C in decalin and an iodine value of 8 to 35, and (B) 10 to 60% by weight of a low-molecular-weight ethylene-propylene-diene copolymer rubber having an ethylene content of 60 to 82 mol%, an intrinsic viscosity [?] of 0.15 to 0.8 dl/g as measured at 135°C in decalin and an iodine value of 8 to 35. The rubber is suitable for use in the fields of tires, automobile parts, general-purpose industrial components and civil engineering and building components.
Mishima Takashi
Nakahama Hidenari
Mitsui Chemicals Incorporated
Smart & Biggar
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