Title:
CYCLOOLEFIN-BASED POLYMER
Document Type and Number:
Japanese Patent JP2006274165
Kind Code:
A
Abstract:
To provide a cycloolefin-based polymer capable of being melt-kneaded at a low torque when melt-kneaded in an extruder, and having excellent moldability.
The cycloolefin-based polymer is free from a gel component, and has the maximum value (λn) of a strain-hardening parameter represented by the ratio of a uniaxial elongation viscosity ηB at an elongation strain B to a uniaxial elongation viscosity ηA at an elongation strain A between arbitrary two points measured at the elongation strain rate of 0.1 s-1 at a temperature 50°C higher than the glass transition temperature of the cycloolefin-based polymer: λn=ηB/ηA=5.0-80.0 at B/A=10 (wherein, A is the elongation strain of a sample at measurement regulated within the range of 0.1-0.3).
Inventors:
SUZUKI TOSHIHIKO
HINO MICHIKO
TAKAHATA HIROAKI
KURODA RYUMA
HINO MICHIKO
TAKAHATA HIROAKI
KURODA RYUMA
Application Number:
JP2005098201A
Publication Date:
October 12, 2006
Filing Date:
March 30, 2005
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO
International Classes:
C08F32/04; C08G61/00
Domestic Patent References:
| JPS6234924A | 1987-02-14 | |||
| JPH06345885A | 1994-12-20 |
Attorney, Agent or Firm:
Takashi Kuboyama
Toru Nakayama
Masayuki Enomoto
Toru Nakayama
Masayuki Enomoto
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