Process for the preparation of polyarylene sulfide and an apparatus for the preparation thereof
US5342920A · kind A · utility
33Cited by
5References
5Claims
0Family size
Assignee
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Key dates
| Filing date | Dec 16, 1992 |
| Grant date | Aug 30, 1994 |
| Priority date | — |
| Expiry date | Dec 16, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00094
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
High molecular weight polyarylene sulfide prepared by reacting an alkali metal sulfide with a dihaloaromatic compound in an organic amide solvent, wherein a gaseous phase part of a reactor is cooled to thereby condense a part of a gaseous phase in the reactor, and the condensed liquid is refluxed to a liquid phase in the reactor. Higher molecular weight is attained by copolymerization with 0.005 to 1.5 mole percent, based on the alkali metal sulfide, of a polyhaloaromatic compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.