Oxygen scavenging polyester compositions for containers
US10479890B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 2016 |
| Grant date | Nov 19, 2019 |
| Priority date | — |
| Expiry date | Nov 20, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2203/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed herein is an oxygen scavenging composition for containers. The oxygen scavenging composition for containers may comprise at least one polyester component, a transition metal catalyst, an oxygen scavenger, and a vegetable oil. The vegetable oil preferably comprises at least one molecule having a double allylic structure. The polyester component preferably comprises at least one acid unit and at least one diol unit. The concentration of double allylic structures of the vegetable oil in the composition may be greater than 5.0 meq/kg of all of the polyester components. The oxygen scavenger is preferably present in the composition at a level less than 1.0% by weight of the total composition. The vegetable oil is preferably present in the composition at a level greater than 0.3% by weight relative to the total weight of the polyester components, the transition metal catalyst and the vegetable oil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.