Homogenous hexamethylenediamine/adipic acid/dimer acid copolyamide preparation
US4826951A · kind A · utility
12Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1987 |
| Grant date | May 2, 1989 |
| Priority date | — |
| Expiry date | Jul 8, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/34
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Homogeneous copolyamides having high melting points and good flexibility, well adapted for the production of textile materials and plastic shaped articles, are prepared by prepolymerizing lower dicarboxylic acid(s) with an excess of hexamethylenediamine in the presence of a catalytically effective amount of a strong inorganic or organic oxyacid, or alkali or alkaline earth metal salt thereof, and thence polycondensing the resulting prepolymer with a fatty acid dimer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.