Production of synthetic fibers
US4533511A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1979 |
| Grant date | Aug 6, 1985 |
| Priority date | — |
| Expiry date | Dec 14, 1999 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/193
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the spinning of synthetic fibers comprising dissolving at least one polycondensation product of at least one polyfunctional phenol component with the phenolic groups attached to a central carbon atom so they are hindered in their free rotation and at least one polyfunctional carboxylic acid chloride having an inherent viscosity .eta. inh greater than 0.5 dl/g in a solvent with a boiling point less than 100.degree. C. to form a spinning solution, forcing the spinning solution through spinning nozzles into a liquid precipitant for fiber formation at a temperature at least 8.degree. C. less than the solvent boiling point to withdraw the majority of the solvent from the fibers, stretching the resulting fibers to 2 to 6 times their length and removing the residual solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.