Preparation of spinnable polyamide from dinitrile/diamine/water with metal salt of oxygenated phosphorus compound catalyst
US4490521A · kind A · utility
12Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1983 |
| Grant date | Dec 25, 1984 |
| Priority date | — |
| Expiry date | Oct 11, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/28
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The process for manufacturing a spinnable polyamide from a dinitrile, a diamine, water and a catalyst is improved by using as a catalyst a metal salt of an oxygenated phosphorus compound. For example, high quality nylon-6,6 is manufactured by contacting adiponitrile, hexamethylene diamine, water and disodium phosphite at an elevated temperature and pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.