Process for preparation of polyarylene thioethers having high melt crystallization temperature
US4769426A · kind A · utility
26Cited by
15References
4Claims
0Family size
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Key dates
| Filing date | Aug 27, 1986 |
| Grant date | Sep 6, 1988 |
| Priority date | — |
| Expiry date | Aug 27, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/0281
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyarylene thioethers having increased melt crystallization temperature are produced by subjecting a polyarylene thioether recovered from a conventional polycondensation of dichlorobenzene with sodium sulfide to a treatment with an aqueous non-oxidative strong acid such asd HCl, H.sub.2 SO.sub.4 or H.sub.3 PO.sub.4 or with an aqueous salt of the non-oxidative strong acid with a weak base such as ammonia.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.