Hydroxy-functional poly(amide ethers) as thermoplastic barrier resins
US5143998A · kind A · utility
28Cited by
7References
7Claims
0Family size
Assignee
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Key dates
| Filing date | Sep 13, 1991 |
| Grant date | Sep 1, 1992 |
| Priority date | — |
| Expiry date | Sep 13, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/40
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Hydroxy-functional poly(amide-ethers) are fabricated into articles such as rigid containers and flexible films exhibiting high barrier to oxygen transmission in both dry and moist environments. For example, a polymer prepared by reacting the diglycidyl ether of 4,4'-isopropylidene bisphenol with .alpha.,.alpha.'-bis(4-hydroxybenzamido)-1,3-xylene exhibits especially high barrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.