MODIFIED ETHYLENE−VINYL ALCOHOL COPOLYMER AND METHOD FOR THE PRODUCTION THEREOF

Title:

MODIFIED ETHYLENE−VINYL ALCOHOL COPOLYMER AND METHOD FOR THE PRODUCTION THEREOF

Document Type and Number:

WIPO Patent Application WO/2002/092643

Kind Code:

A1

Abstract:

A modified ethylene−vinyl alcohol copolymer (C) having an ethylene content of 5 to 55 mol %, which contains a specific structural unit (I) in an amount of 0.3 to 40 mol % and may be obtained by reacting an ethylene−vinyl alcohol copolymer (A) with a monovalent epoxy compound (B) having a molecular weight of 500 or less&semi and a method for producing the modified ethylene−vinyl alcohol copolymer (C) which comprises melting and kneading an ethylene−vinyl alcohol copolymer (A) with a monovalent epoxy compound (B) in an extruder. The modified ethylene−vinyl alcohol copolymer (C) is superior to a non−modified ethylene−vinyl alcohol copolymer (A) in transparency, stretchability, softness and flexing resistance due to the specific structural unit (I) incorporated therein, and thus, can be used as a barrier material in various applications requiring the above performance capabilities.

Inventors:

IKEDA KAORU (JP)
TAI SHINJI (JP)
ISOYAMA KOUTA (JP)
WATANABE TOMOYUKI (JP)

Application Number:

PCT/JP2002/004607

Publication Date:

November 21, 2002

Filing Date:

May 13, 2002

Export Citation:

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Assignee:

KURARAY CO (JP)
IKEDA KAORU (JP)
TAI SHINJI (JP)
ISOYAMA KOUTA (JP)
WATANABE TOMOYUKI (JP)

International Classes:

C08F8/00; (IPC1-7): C08F8/00

Foreign References:

JPH10338714A

1998-12-22

Other References: