Crosslinked copolymers of aliphatic polyester diols and dianhydrides
US4946594A · kind A · utility
38Cited by
1References
7Claims
0Family size
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Key dates
| Filing date | Oct 16, 1989 |
| Grant date | Aug 7, 1990 |
| Priority date | — |
| Expiry date | Oct 16, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G31/11
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A crosslinked copolymer composition is derived from an aliphatic polyester, a dianhydride and a diicoyanate. The copolymer membrane has high thermal stability and good aromatic/saturate selectivity and permeability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.