Production and/or handling of aryl polyethers and thioethers polymers
US5051495A · kind A · utility
3Cited by
21References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 1988 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | May 18, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/46
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In making polyarylethersulphones or polyaryletherketones or their thioanalogues by reaction of phenols with aromatic halogen compounds, raw polycondensation product is freed of alkali halide by adjusting its composition and/or temperature so that it dissolves at least 0.5% w/w of water and holds the polymer in solution, and then contacting it in liquid form with hot water, preferably under pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.