C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
C08L 53/02 (2006.01) B60R 19/03 (2006.01) C08L 53/00 (2006.01)
Patent
CA 2045722
-25- ABSTRACT OF THE DISCLOSURE The invention provides a moldable resin composition comprising (A) 50-73 wt% of a crystalline ethylene- propylene block copolymer in which the content of ethylene is 5-15 wt%, (B) 10-20 wt% of a hydro-genated block copolymer consisting of (i) 10-40 wt% of blocks of an aromatic vinyl compound polymer and (ii) 90-60 wt% of blocks of a conjugated diene polymer, (C) 2-7 wt% of an amorphous ethylene-propylene copolymer in which the content of propylene is 20-30 wt% and (D) 15-25 wt% of talc, with the proviso that the total amount of (B) and (C) is 12-25 wt%. The particulars of the components (A) to (D), including the degree of solubility of the polypropylene component of the block copolymer (A), the degree of hydrogenation of each of the blocks (i) and (ii) of the copolymer (B), Mooney viscosity of the copolymer (C) and the particle size distribution of the talc (D), are strictly specified. The resin composition can be molded into automobile bumpers which are good in appearance and paint coatability and sufficiently high in both rigidity and impact resistance.
Morita Hideyo
Tanaka Kazuyoshi
Terada Masahiro
Ueno Kohei
Nissan Motor Co. Ltd.
Robic
Ube Industries Ltd
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