Title:
ENHANCED OXYGEN BARRIER PERFORMANCE FROM MODIFICATION OF ETHYLENE VINYL ALCOHOL COPOLYMERS (EVOH)
Document Type and Number:
WIPO Patent Application WO2001090202
Kind Code:
A3
Abstract:
Herein is disclosed a modified ethylene vinyl alcohol polymer (EVOH) comprising an oxygen scavenging functional group. Preferably, the modified EVOH comprises structures (IV), (V), and (VI) wherein x in an integer greater than or equal to 1, y is an integer greater than or equal to 1, z is an integer greater than or equal to 1, and R comprises a cycloalkenyl group. The modifier EVOH is useful in oxygen barrier applications, such as forming an oxygen barrier layer of a packaging article. Also disclosed are methods of modifying ethylene vinyl alcohol polymers, and using the modified EVOH to make packaging articles with a superior barrier to entry by atmospheric oxygen.
Inventors:
CAI GANGFENG
CHING TA YEN
YANG HU
CHING TA YEN
YANG HU
Application Number:
PCT/US2001/016040
Publication Date:
April 11, 2002
Filing Date:
May 18, 2001
Export Citation:
Assignee:
CHEVRON PHILLIPS CHEMICAL CO (US)
International Classes:
A22C13/00; B65D81/26; B32B27/28; B65D65/40; C08F2/50; C08F8/00; C08F8/48; (IPC1-7): C08F8/00
Domestic Patent References:
| WO1999048963A2 | 1999-09-30 |
Foreign References:
| US4743409A | 1988-05-10 | |||
| EP0751153A1 | 1997-01-02 | |||
| US2238447A | 1941-04-15 |
Other References:
DATABASE WPI Section Ch Week 198731, Derwent World Patents Index; Class A14, AN 1987-216257, XP002185696
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