Process for the manufacture of spinnable polyamides utilizing a mixture of an oxygenated phosphorus compound and an oxygenated boron compound as catalyst
US4603192A · kind A · utility
8Cited by
1References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 10, 1985 |
| Grant date | Jul 29, 1986 |
| Priority date | — |
| Expiry date | Jan 10, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/28
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The process for manufacturing a nylon-type polyamide from a dinitrile, a diamine and water in the presence of a catalyst is improved by using as a catalyst an oxygenated phosphorus compound and an oxygenated boron compound. For example, high quality nylon-6,6 is manufactured by contacting adiponitrile, hexamethylene diamine and water with boric acid and phosphorous acid at an elevated temperature and pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.