Preparation of polyamides from omega-aminonitriles
US5109104A · kind A · utility
14Cited by
1References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 4, 1990 |
| Grant date | Apr 28, 1992 |
| Priority date | — |
| Expiry date | Oct 4, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
High quality polyamides are prepared from a mixture of an omega-aminonitrile, an oxygenated phosphorous catalyst, and water. When the reactor temperature reaches about 200 degrees to about 260 degrees C. continuously adding water, and continuously removing water vapor and ammonia until 15 to 75 grams of water have been added per 100 grams of omega-aminonitile, and then stopping the water addition and continuing the reaction until a high molecular weight polyamide is obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.