Title:
PROPYLENE BASED BLOCK COPOLYMER COMPOSITION
Document Type and Number:
Japanese Patent JP3385733
Kind Code:
B2
Abstract:
PURPOSE: To obtain a propylene-based block copolymer composition suitable for producing a molding excellent in transparency, shrinkage factor and resistance to whitening on impact and bending.
CONSTITUTION: This propylene-based block copolymer composition has a value of 0.2-2.0 of a [([η]RC/[η]PP)×(WPP/WRC)] and 0.3-4 ratio of the melt flow of a homopolymer component to the melt flow of a copolymer component and a value of ≤6.5 of the ([η]RC), when the intrinsic viscosity of the homopolymer component is ([η]PP), the intrinsic viscosity of the copolymer component is (WPP) and weights of the homopolymer component and the weight of the copolymer component are each (WPP) and (WRC) The composition is excellent in whitening resistance to both of impact and bending and has 61-36% haze (1mm).
Inventors:
Chikashi Okayama
Takanori Nakajima
Masami Kimura
Hideo Nobuhara
Takanori Nakajima
Masami Kimura
Hideo Nobuhara
Application Number:
JP18185294A
Publication Date:
March 10, 2003
Filing Date:
July 11, 1994
Export Citation:
Assignee:
Chisso Corporation
International Classes:
C08L53/00; C08F297/08; (IPC1-7): C08F297/08; C08L53/00
Domestic Patent References:
| JP59206424A | ||||
| JP6145268A | ||||
| JP6327517A | ||||
| JP6145270A |
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