Process for the preparation of polyamides with oligomer formation
US5310860A · kind A · utility
18Cited by
6References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1992 |
| Grant date | May 10, 1994 |
| Priority date | — |
| Expiry date | Dec 30, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L77/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the manufacture of polyamides consisting essentially of the stages of: PA1 (i) reacting 10 to 90% by weight of the aliphatic and/or cycloaliphatic and/or aromatic-aliphatic diamines (c) with a lactam and/or corresponding amino acid (a) or the substantially stoichiometric combination of one or more aliphatic diamine(s) and of one or more dicarboxylic aliphatic acid(s) and with the aromatic diacid (b); and PA1 (ii) reacting the remainder of the aliphatic and/or cycloaliphatic and/or aromatic-aliphatic diamine (c) with the oligomer produced in stage (i) in one or more substages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.