Process for the manufacture of polyamide from dinitrile and diamine in contact with an ester of an oxygenated phosphorus compound catalyst and a strong base
US4749776A · kind A · utility
8Cited by
3References
11Claims
0Family size
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Key dates
| Filing date | Nov 3, 1986 |
| Grant date | Jun 7, 1988 |
| Priority date | — |
| Expiry date | Nov 3, 2006 |
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 ester of oxygenated phosphorus compound in conjunction with a strong base. For example, high quality nylon-6,6 is manufactured by contacting adiponitrile, hexamethylene diamine and water with an ester of an oxygenated phosphorous compound and sodium hydroxide at an elevated temperature and pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.