Wholly aromatic polyamide from N,N'-bis (4-amino phenyl)-isophthalamide
US5093464A · kind A · utility
16Cited by
4References
10Claims
0Family size
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Key dates
| Filing date | Nov 27, 1989 |
| Grant date | Mar 3, 1992 |
| Priority date | — |
| Expiry date | Nov 27, 2009 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD01F6/805
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
New wholly aromatic polyamides are provided. This polymers are prepared by a mixture of N,N'-bis(4-aminophenyl)-isophthalamide and p-phenylenediamine in a tertiary amide solvent containing an alkali metal salt such as LiCl and a tertiary amine as an acid acceptor. The polymers are easily dry-jet spun to form a fiber and cast to form a film. The fiber and film so obtained have ultrahigh tenacity, elasticity and elongation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.