Stabilizing melt crystallization temperature in arylene sulfide polymer heat treatment
US4501713A · kind A · utility
12Cited by
21References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 15, 1983 |
| Grant date | Feb 26, 1985 |
| Priority date | — |
| Expiry date | Jun 15, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/65
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for stabilizing the Tmc of PPS subjected to heat treatment in a temperature range between 240.degree. C. and 320.degree. C., particularly during the heating process of an extrusion operation, by increasing the tmperature of the polymer through the 240.degree. C.-320.degree. C. range at a rate of at least 20.degree. C. per minute or by subsequently raising the temperature of the polymer to at least 350.degree. C. for a time sufficient to stabilize the Tmc of the polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.