Two-step process for the manufacture of polyamide from diamine and dinitrile
US4739035A · kind A · utility
8Cited by
11References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1986 |
| Grant date | Apr 19, 1988 |
| Priority date | — |
| Expiry date | Aug 27, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/08
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The process for manufacturing polyamides, suitable for fibers, from an .alpha.,.omega.-dinitrile, and an .alpha.,.omega.-diamine in water in contact with a catalyst that is improved by (1) first, reacting the dinitrile and water in the presence of the catalyst at a temperature sufficient to cause substantial hydrolysis of the dinitrile and (2) subsequently adding the diamine to the reaction mixture of the dinitrile and water at a temperature sufficient to cause polymerization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.