Oxygen-scavenging polymer blends suitable for use in packaging
US7985456B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 2009 |
| Grant date | Jul 26, 2011 |
| Priority date | — |
| Expiry date | Jan 16, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1397
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Polymer blends are disclosed that comprise one or more polybutadiene homopolymers or copolymers having at least one functionality capable of entering into condensation reactions; one or more polyethylene terephthalate homopolymers or copolymers obtained using a catalyst system comprising aluminum atoms and one or more alkaline earth metal atoms, alkali metal atoms, or alkali compound residues, optionally obtained by a melt-phase polymerization process; and one or more transition metal atoms. The blends are useful for packaging, and exhibit improved oxygen-scavenging activity compared with blends made using many conventional polyethylene terephthalate polymers prepared with conventional catalyst systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.