Polyester containers having improved gas barrier properties
US4436895A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 1983 |
| Grant date | Mar 13, 1984 |
| Priority date | — |
| Expiry date | Apr 13, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/6856
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides containers having improved resistance to gas permeability. The containers are formed from a polyester resin which comprises the reaction product of a diol containing up to about 8 carbon atoms and a diacid component which comprises terephthalic acid and a second diacid selected from iminodiacetic acid, oxydiacetic acid, thiodiacetic acid, and mixtures thereof. The second diacid is present in a concentration of about 1 to 50 mole percent, based upon the total amount of diacid. The polyester resin has an inherent viscosity of about 0.5 to 1.5. A preferred polyester is that derived from ethylene glycol, terephthalic acid, and oxydiacetic acid. The containers which are provided by the present invention may be in the form of sheet, film, molded articles, such as bottles, and other such structures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.