Production method of cyclic polyarylene sulfide
US9567437B2 · kind B2 · utility
4Cited by
4References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2013 |
| Grant date | Feb 14, 2017 |
| Priority date | — |
| Expiry date | Dec 26, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There is provided a production method of a cyclic polyarylene sulfide by heating and reacting a raw material mixture (a) including at least a sulfidizing agent, a dihalogenated aromatic compound and an organic polar solvent. The production method continually performs each of an operation (A) of supplying the raw material mixture (a) to a reaction mixture (b) in a reaction vessel which includes a reaction product obtained from the raw material mixture (a), an operation (B) of withdrawing part of the reaction mixture (b) from the reaction vessel, and an operation (C) of heating the reaction vessel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.