Process for preparing polyarylene sulfides under reduced pressure
US5194580A · kind A · utility
24Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1989 |
| Grant date | Mar 16, 1993 |
| Priority date | — |
| Expiry date | Aug 1, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/025
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for preparing a polyarylene sulfide involves dehydrating a mixture of a hydrous sulfur source and an organic polar solvent under a reduced pressure in a rectification tower and contacting a dihalogen aromatic compound with a dehydrated sulfur source in the organic polar solvent. This process provides the polyarylene sulfide with a white color and a higher molecular weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.