Polyarylene polyethersulfone ionomers
US4598137A · kind A · utility
13Cited by
4References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1984 |
| Grant date | Jul 1, 1986 |
| Priority date | — |
| Expiry date | Nov 30, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2381/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An aromatic ionomeric copolymer having arylether and arylsulfone linkages has been prepared by condensation of both: PA0 (a) The alkali metal bisphenate salts of 9,9-bis(4-hydroxyphenyl-fluoren-4-carboxylic acid, optionally with up to 99 mol percent of another dihydric phenol based on the combined bisphenates in the mixture; and PA0 (b) dihalodiphenylsulfones where the halogen is selected from chlorine or fluorine. The copolymers are useful inter alia as ion exchange materials and permselective membranes. A process of preparing and purifying the carboxylic acid containing bisphenol monomer is described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.