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US 6,472,477 B2Granted
Polypropylene resin composition
AssigneeSumitomo Chemical Company, Limited
InventorsSusumu Kanzaki, Kenji Atarashi, Mitsuji Tsuji
Life of this patent
Estimating the term…
Abstract
A polypropylene resin composition comprising: 95 to 50% by weight of a propylene homopolymer (A) having an intrinsic viscosity [η]A of not more than 1.3 dl/g; and 5 to 50% by weight of a propylene-ethylene block copolymer (B) having a propylene homopolymer portion having an intrinsic viscosity [η]BP of from 1.4 to 2.0 dl/g, and a propylene-ethylene random copolymer portion having an intrinsic viscosity [η]BEP of from 4.0 to 15 dl/g, the polypropylene resin composition having a melt flow rate of from 5.0 to 150 g/10 min.
Claims10
A polypropylene resin composition comprising:
- 95 to 50% by weight of a propylene homopolymer (A) having an intrinsic viscosity [η]A of not more than 1.3 dl/g;
- and
- 5 to 50% by weight of a propylene-ethylene block copolymer (B) having a propylene homopolymer portion having an intrinsic viscosity [η]BP of from 1.4 to 2.0 dl/g, and a propylene-ethylene random copolymer portion having an intrinsic viscosity [η]BEP of from 4.0 to 15 dl/g, the polypropylene resin composition having a melt flow rate of from 5.0 to 150 g/10 min. and the sum of the (A) and (B) being 100% by weight.
Dependencies are inferred from the claim text.