Preparation of aromatic polyamide with solvent system comprising N-alkyl substituted amide and quaternary ammonium compound
US4737571A · kind A · utility
10Cited by
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5Claims
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Key dates
| Filing date | Oct 24, 1986 |
| Grant date | Apr 12, 1988 |
| Priority date | — |
| Expiry date | Oct 24, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/32
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process and its product are disclosed whereby poly-p-phenylene terephthalamide is prepared in a polymerization solvent comprising an N-alkyl-substituted amide, preferably N-methyl-2-pyrrolidone, and a quaternary ammonium chloride, preferably methyl-tri-n-butylammonium chloride.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.