Enhanced oxygen barrier performance from modification of ethylene vinyl alcohol copolymers (EVOH)
US7288593B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 10, 2006 |
| Grant date | Oct 30, 2007 |
| Priority date | — |
| Expiry date | Jul 10, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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 is 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 modified EVOH is useful in oxygen barrier applications, such as a 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.