Process for preparing a granular polyarylene sulfides having high molecular weight
US5241043A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 24, 1990 |
| Grant date | Aug 31, 1993 |
| Priority date | — |
| Expiry date | Dec 24, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/0222
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for preparing a granular polyarylene sulfide having a high molecular weight is a one-stage polycondensation process which involves subjecting a dihalogen aromatic compound to polycondensation with a source of sulfur in the presence of a polymerization aid in an organic polar solvent and setting the temperature for polycondensation to a range from 220.degree. C. to 248.degree. C. for a predetermined period of time prior to completion of polycondensation up to completion of polycondensation. The resulting granular polyarylene sulfide is suitable for molding or forming into sheets, films, fibers and so on, causes less burrs when subjected to injection molding, has a high molecular weight sufficient to create the property of forming a gel, and is easy to handle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.