Process for continuous production of polyarylene sulfide
US7026439B2 · kind B2 · utility
17Cited by
13References
7Claims
0Family size
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Key dates
| Filing date | Mar 15, 2002 |
| Grant date | Apr 11, 2006 |
| Priority date | — |
| Expiry date | Mar 15, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/025
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There is disclosed a process for continuously producing a polyarylene sulfide which comprises reacting a sulfur source with a dihalogenated aromatic compound in an aprotic organic solvent, characterized by maintaining the content of the dihalogenated aromatic compound in the polymerization liquid after the substantial completion of the polymerization reaction at 5 mg/g or higher. It is made possible by the process according to the present invention to efficiently produce the polyarylene sulfide which has a high molecular weight and is excellent in thermal stability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.