Process for heat treating shaped articles of poly {[benzo(1,2-d:4,5-d')bisthiazole-2,6-diyl]-1,4-phenylene}, its cis isomer or mixtures thereof
US4554119A · kind A · utility
30Cited by
3References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 11, 1983 |
| Grant date | Nov 19, 1985 |
| Priority date | — |
| Expiry date | Apr 11, 2003 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2086/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The properties of shaped articles of poly {[benzo(1,2-d:4,5-d')bisthiazole-2,6-diyl]-1,4-phenylene}, its cis isomer and mixtures thereof are improved by a process of heat treatment under tension. The articles may be prepared from a dope obtained by dissolving the formed polymer in an appropriate solvent or by forming the polymer under conditions which enable the article to be prepared directly from the reaction medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.