Hydroxyl functionalized polyetheramines as barrier packaging for oxygen-sensitive materials
US5275853A · kind A · utility
122Cited by
18References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 7, 1992 |
| Grant date | Jan 4, 1994 |
| Priority date | — |
| Expiry date | Apr 7, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyetheramines having improved barrier to oxygen are thermoplastic polymers having aromatic ether/amine repeating units in their backbones and pendant hydroxyl moieties. Such polyetheramines are prepared by reacting diglycidyl ethers of dihydric aromatic compounds such as the diglycidyl ether of bisphenol-A, hydroquinone, or resorcinol with amines having no more than two amine hydrogens per molecule, such as piperazine or ethanolamine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.