Polyesters with low molecular weight additives for improved gas barrier properties
US8377530B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2011 |
| Grant date | Feb 19, 2013 |
| Priority date | — |
| Expiry date | Aug 13, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/139
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is a polyester polymer composition comprising at least one polyethylene terephthalate polyester in an amount ranging from 94.0 weight percent to 99.5 weight percent and at least one additive in an amount ranging from 0.5 weight percent to 6 weight percent, each based on the total weight of the polyester composition. The at least one additive comprises a diamide molecule. The composition of the present invention is useful in producing shaped articles such as, for example, sheeting, films, tubes, bottles, preforms, and profiles. These articles can exhibit improved gas barrier properties. The process for making the polymer composition and the shaped articles is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.