Melt stabilization of poly arylene sulfide ketone
US4892929A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1988 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Nov 16, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G75/024
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Melt stable polymeric resins are provided by process which comprises heating a first particulate resin selected from the group consisting of poly(arylene sulfide ketone) and poly(arylene sulfide diketone), while in the presence of a gaseous oxidizing atmosphere, to a temperature at least about 150.degree. C. (302.degree. F.) but below the melting point of the first particulate resins, for time sufficient to produce a second particulate resin. The thermal stability of the second particulate resin is superior to that of its respective first particulate resin is superior to that of its respective first particulate resin. Moreover, the molecular weight of the second particulate resin is greater than that of its respective first particulate resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.