Transparent, oxygen-scavenging compositions and articles prepared therefrom
US7964258B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2006 |
| Grant date | Jun 21, 2011 |
| Priority date | — |
| Expiry date | Apr 13, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31739
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are oxygen-scavenging polymer compositions having high transparency and low haze comprising immiscible blends of one or more thermoplastic polymers selected from polyesters, polycarbonates, and polyarylates, a copolyamide or a transamidized, homogeneous blend of a least two polyamides, and a metal catalyst. The components of the immiscible blend which have refractive indices which differ by about 0.006 to about −0.0006. The small difference in the refractive indices enable the incorporation of regrind into the polymer composition to produce transparent shaped articles. The blends of the present invention are useful in producing shaped articles such as, for example, sheeting, films, tubes, bottles, preforms and profiles. These articles may have one or more layers and can exhibit improved excellent barrier properties and good melt processability while retaining excellent mechanical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.