C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/3080
C08L 53/00 (2006.01) C08K 3/22 (2006.01) C08K 5/54 (2006.01) C08L 9/00 (2006.01) C08L 23/16 (2006.01)
Patent
CA 2021263
A process for producing a polyolefin thermoplastic elastomer composition having superior rubbery elasticity, mechanical properties, etc. and also having improved processing fluidity, workability, etc. is provided, which process comprises blending (A) 40 to 80% by weight of an ethylene-propylene copolymer rubber and/or an ethylene-propylene-diene a terpolymer, as a soft segment component, (B) 60 to 20% by weight of a crystalline ethylene-propylene block copolymer having an ethylene content of at least 5% by weight and a melt flow index of 0.5 to 30 g/10 minutes or a crystalline ethylene-propylene random copolymer having an ethylene content of at least 1.5% by weight and a melt flow index of 0.5 to 30 g/ minutes, each as a hard segment, and based upon 100 parts by weight of the total of (A) and (B), (C) 0.3 to 5 parts by weight of an organosilane, (D) 0.1 to 3 parts by weight of an organic radical-generator, (E) 0 to 5 parts by weight of white carbon, and (F) 0 to 100 parts by weight of an extender oil, followed by subjecting the resulting blend to dynamic partial crosslinking.
Iizuka Hisao
Nozokido Yutaka
Saito Fumikazu
Tabata Nobuchika
Chisso Corporation
Riches Mckenzie & Herbert Llp
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