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Title:
CYCLOOLEFIN ADDITION COPOLYMER, CROSSLINKED PRODUCT OF THE COPOLYMER, METHOD FOR PRODUCING THE COPOLYMER, CROSSLINKING COMPOSITION AND USE OF THE SAME
Document Type and Number:
Japanese Patent JP2005126514
Kind Code:
A
Abstract:

To provide a cycloolefin copolymer in which a structural unit (a) derived from a specific cycloolefin compound having a methoxysilyl group and a structural unit (b) derived from another cycloolefin compound are randomly arranged in a uniform composition distribution, wherein the copolymer has good optical transparency and heat resistance and a small coefficient of linear expansion and is used as a suitable material for a sheet or film for an optical material, and to provide a crosslinked cycloolefin copolymer obtained by crosslinking the copolymer and methods for producing these copolymers.

The cycloolefin addition copolymer comprises 70-98 mol% of a structural unit (a) derived from bicyclo[2.2.1]hept-2-ene and 2-20 mol% of a structural unit (b) derived from a specific cycloolefin compound having a methoxysilyl group, wherein the copolymer has a number average molecular weight of 30,000-300,000 and is soluble in toluene and cyclohexane at 25°C.


Inventors:
Oshima, Noboru
Ehata, Satoshi
Okita, Kenzo
Sakabe, Nobuyuki
Hayashi, Toshihito
Application Number:
JP2003000361785
Publication Date:
May 19, 2005
Filing Date:
October 22, 2003
Export Citation:
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Assignee:
JSR CORP
International Classes:
C08K5/00; C08F4/70; C08F232/08; C08L45/00; (IPC1-7): C08F232/08; C08F4/70; C08K5/00; C08L45/00
Attorney, Agent or Firm:
鈴木 俊一郎
牧村 浩次
高畑 ちより
鈴木 亨