Polyisophthalates and copolymers thereof having high barrier properties
US4403090A · kind A · utility
46Cited by
5References
26Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 7, 1982 |
| Grant date | Sep 6, 1983 |
| Priority date | — |
| Expiry date | Sep 7, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/181
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyisophthalates, for example, poly(ethylene isophthalate), or copolymers thereof, have low glass transition temperatures, even lower than poly (ethylene terephthalate). Unexpectedly, such polyisophthalates have very good barrier properties with regard to oxygen and carbon dioxide penetration. The polyisophthalates can be utilized as packaging materials, for example as films or containers such as bottles for beverages such as intoxicating beverages such as beer, and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.