Process for spinning from solution of polyamide-imides (PAI) based on tolylene or met-phenylene diisocyanates and fibres thus obtained
US5756635A · kind A · utility
14Cited by
2References
35Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1996 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | Sep 27, 2016 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/74
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a process for obtaining PAI fibres by spinning PAI in solution and to the fibres thus obtained. They are obtained by dry or wet spinning into dimethylalkyleneurea followed by removal of the solvent and overdrawing at high temperature. The yarns and fibres obtained are produced from PAI based on tolylene or meta-phenylene diisocyanate, and on an aromatic acid anhydride and/or an aromatic dianhydride, and optionally on one or a number of diacid compounds. They exhibit an outstanding thermomechanical behavior and make it possible to gain access to very low linear densities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.