Cycloolefin copolymer formed by ring-opening polymerization,...

Details Cycloolefin copolymer formed by ring-opening polymerization,... Cycloolefin copolymer formed by ring-opening polymerization,...

2006-06-06

2006-06-06

Teskin, Fred (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S266000, C526S279000, C525S326500, C525S327200, C525S329500, C525S338000

Reexamination Certificate

active

07056999

ABSTRACT:
Disclosed herein are a ring-opened cycloolefin copolymer excellent in optical properties such as transparency, low in water (moisture) absorption property, high in affinity for other materials, good in post processing properties such as adhesive property and printability, and excellent in heat resistance and mechanical strength, a production process thereof, and an optical material.The ring-opened cycloolefin copolymer of the invention contains a structural unit (A) represented by any one of general formulae (1-1) to (1-3) and a structural unit (B) derived from a specific cycloolefin having an ester group in a proportion of 10:90 to 50:50 in terms of a molar ratio, wherein a monomer for obtaining the structural unit (A) is a tricyclomonoolefin compound containing an endo form in a proportion of at least 80 mol % and has a glass transition temperature of 120 to 250° C.:wherein in the general formulae (1-1) to (1-3), R1to R13individually represent a group selected from a hydrogen atom, halogen atoms, and alkyl groups and halogenated alkyl groups having 1 to 4 carbon atoms, and X1to X3mean individually an ethylene group or vinylene group.

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patent: 1-132626 (1989-05-01), None
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U.S. Appl. No. 10/529,497, filed Mar. 29, 2005, Ohkita et al.
U.S. Appl. No. 10/515,189, filed Mar. 23, 2005, Oshima et al.

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