Title:
CYCLIC OLEFIN COPOLYMER COMPOSITION
Document Type and Number:
Japanese Patent JP3221720
Kind Code:
B2
Abstract:
PURPOSE: To obtain the title composition excellent in elastic recovery, melt flow characteristics, moldability, etc., by mixing two specified cyclic olefin copolymers different in intrinsic viscosity at a specified weight ratio.
CONSTITUTION: The title composition is produced by mixing 100 pts.wt. cyclic olefin copolymer (A) which has repeating units derived from an α-olefin (e.g. ethylene) and one derived from a cyclic olefin (e.g. 2-norbornene) and has a glass transition temperature of 30°C or lower with 2-400 pts.wt. cyclic olefin copolymer (B) which has repeating units derived from an α-olefin and ones derived from a cyclic olefin and has a glass transition temperature of 30°C or lower and an intrinsic viscosity (dl/g) different by at least 5% from that of component A. This composition hardly suffers melt fracture in the molding step and is suitably used as a molding material for automobile parts, etc.
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Inventors:
Yasuhiro Goto
Hiroshi Maezawa
Junichi Matsumoto
Hiroshi Maezawa
Junichi Matsumoto
Application Number:
JP9865292A
Publication Date:
October 22, 2001
Filing Date:
March 25, 1992
Export Citation:
Assignee:
IDEMITSU KOSAN CO.,LTD.
International Classes:
C08L23/02; C08L23/00; C08L23/08; C08L23/18; C08L45/00; (IPC1-7): C08L23/08; C08L45/00
Domestic Patent References:
| JP2276842A |
Attorney, Agent or Firm:
Kihei Watanabe