Title:
METHOD OF MANUFACTURING MOLDED ARTICLE AND OPTICAL INJECTION MOLDED ARTICLE
Document Type and Number:
Japanese Patent JP2009178941
Kind Code:
A
Abstract:
To provide a method of manufacturing a molded article excellent in heat resistance by using a polymer excellent in moldability, and an optical injection molded article excellent in heat resistance and moldability.
In the method of manufacturing the molded article, a cycloolefinic polymer is injection-molded which contains 20-50 wt.% of a repeating unit originating from dicyclopentadiene per 100 wt.% of the whole repeating unit, and 50-80 wt.% of a repeating unit originating from a specific norbornene type compound per 100 wt.% of the whole repeating unit, and of which the polystyrene converted weight average molecular weight due to gel permeation chromatography is 35,000-55,000. The optical injection molded article is also disclosed.
Inventors:
KAIZU MITSUTAKA
KATSUTA KOHEI
OKANIWA MOTOKI
KAJIWARA ICHIRO
KATSUTA KOHEI
OKANIWA MOTOKI
KAJIWARA ICHIRO
Application Number:
JP2008020034A
Publication Date:
August 13, 2009
Filing Date:
January 31, 2008
Export Citation:
Assignee:
JSR CORP
International Classes:
B29C45/00; C08G61/08; B29K45/00; B29L11/00
Domestic Patent References:
| JP2003048237A | 2003-02-18 |
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