(2,5-disubstituted-1,4-phenylene oxide) block or graft copolymer

US6383636B2 · kind B2 · utility

Assignees

• Director-General of National Institute of Advanced Industrial Science and Technology, Ministry of Economy, Trade and Industry · JP
• Japan Chemical Innovation Institute · JP

Inventors

• Hideyuki Higashimura · Tsukuba, JP
• Shuhei Namekawa · Tsukuba, JP
• Shiro Kobayashi · Hitachi, JP

Key dates

• Filing date: Mar 28, 2001
• Grant date: May 7, 2002
• Expiry date: Mar 28, 2021

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2982
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

There is disclosed a (2,5-disubstituted-1,4-phenylene oxide) block copolymer which comprises one or more block structural units represented by formula (I) and at least one particular divalent structural unit in a molecule. There is also disclosed a (2,5-disubstituted-1,4-phenylene oxide) graft polymer which comprises one or more structural units of formula (IV), or three or more of structural unit of formula (IV) and particular divalent structural unit, in a molecule. (wherein R1 represents an unsubstituted or substituted hydrocarbon group, and the two R1s may be the same or different; a represents a number average degree of polymerization and is 5 or more; R4 represents a trifunctional unsubstituted or substituted hydrocarbon group; U represents —CO—, —OCO—, or —NHCO—; and f is 1 or 0.)