Production of aromatic sulfide/ketone polymers
US5071944A · kind A · utility
11Cited by
16References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 1989 |
| Grant date | Dec 10, 1991 |
| Priority date | — |
| Expiry date | Feb 27, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/024
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polymerization process is provided for the production of high molecular weight aromatic sulfide/ketone polymer from at least one dihaloaromatic ketone, at least one alkali metal sulfide, at least one polar organic compound and water wherein the polymerization reaction is conducted in two distinct steps separated by an intermediate step of removal of at least a portion of the water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.