Aromatic sulfide/sulfone polymer production
US4958004A · kind A · utility
2Cited by
11References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1987 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Jul 31, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process is provided for the production of aromatic sulfide/sulfone polymers which involves contacting under suitable polymerization reaction conditions: (1) at least one dihaloaromatic sulfone, (2) at least one organic amide, (3) at least one alkali metal hydrosulfide, (4) water, and (5) at least one member selected from the group consisting of (a) alkali metal carbonates and (b) mixtures of alkali metal carbonates with alkali metal hydroxides wherein said mixtures have at least about 0.5 mole percent alkali metal carbonate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.