Copolyesters having improved gas barrier properties
US4388456A · kind A · utility
2Cited by
7References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1982 |
| Grant date | Jun 14, 1983 |
| Priority date | — |
| Expiry date | Mar 1, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are copolyesters characterized by relatively high glass transition temperatures and low oxygen permeability, the copolyesters being derived from PA0 A. 100 mol % of an acid component comprising about 5-75 mol % isophthalic acid and about 95-25 mol % 4-carboxy-N-(carboxymethyl)phthalimide, and PA0 B. 100 mol % of a glycol component, at least 80 mol % of said glycol component being ethylene glycol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.