Compatible blend systems from ethylene vinyl alcohol and oxygen scavenging polymers
US6525123B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2000 |
| Grant date | Feb 25, 2003 |
| Priority date | — |
| Expiry date | May 19, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2201/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Herein is disclosed an oxygen barrier composition comprising ethylene/vinyl alcohol copolymer (EVOH), an oxygen scavenging polymer, and a transition metal salt. The composition can be in the form of a physical blend or a cross-linked blend, and can further comprise a compatibilizer, a transesterification catalyst, or both. Also disclosed is a packaging article comprising at least one high oxygen barrier layer comprising the blend of EVOH, the oxygen scavenging polymer, and the transition metal salt. The packaging article can be a single-layer or a multilayer article, and can be flexible or rigid. A multilayer packaging article can further comprise a structural layer or layers, an oxygen barrier layer, an oxygen scavenging layer, an oxygen permeable layer or layers, or an adhesive layer or layers, among others. In addition, herein is disclosed a method of making the blend of EVOH, the oxygen scavenging polymer, and the transition metal salt, comprising providing and blending the materials. The blend can be used in a method of making an oxygen scavenging packaging article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.