C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/3036
C08L 53/00 (2006.01) C08L 53/02 (2006.01)
Patent
CA 1271864
ABSTRACT OF THE DISCLOSURE A resin composition for soft bumpers is disclosed, comprising (a) 100 parts by weight of a selectively hydrogenated block copolymer having at least two mono-alkenyl or mono-alkenylidene aromatic hydrocarbon polymer blocks having a number average molecular weight of from 5,000 to 15,000 and at least one partially or completely hydrogenated aliphatic conjugated diene hydrocarbon polymer block having a number average molecular weight of from 10,000 to 75,000, (b) from 10 to 100 parts by weight of an ethylene-propylene copolymer rubber having a Mooney viscosity of from 15 to 50 as measured at 100°C and an intrinsic viscosity of from 1.2 to 2.0 dl/g as measured in a xylene solution at 70°C, (c) from 200 to 400 parts by weight of a propylene-ethylene block copolymer having a melt flow rate of from 10 to 30 g/10 min and an ethylene content of from 5 to 15% by weight, and (d) from 20 to 200 parts by weight of a non- aromatic diluent oil for rubber. The composition provides soft bumpers having improved appearance, such as gloss and surface uniformity, improved scratch resistance and excellent coating properties.
513116
Daimon Akio
Katsuki Hiroshi
Riches Mckenzie & Herbert Llp
Sumitomo Chemical Company Limited
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