Process for manufacture of soluble highly branched polyamides, and at least partially aliphatic highly branched polyamides obtained therefrom
US6541599B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 31, 2001 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | Jul 31, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G69/36
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the manufacture of soluble hyperbranched polyamides is disclosed comprising the steps of combining multifunctional monomer reactants comprising amine and carboxylic acid functional groups in a reactor with water, and reacting amine and carboxylic acid functional groups of the multi-functional monomers at elevated temperature and pressure for a period of time sufficient to form a highly branched polyamide. The present invention advantageously provides a simple, practical, and environmentally friendly process for the manufacture of soluble hyperbranched polyamides comprising multifunctional in-chain and/or end groups. The present invention also provides a process for the manufacture of soluble hyperbranched polyamides from monomers with a broad range of the ratio of functional amine groups to acid groups. The invention is also directed towards soluble highly branched polyamides which may be obtained by a process of the invention, which comprise monomer units derived from multifunctional amine or multifunctional acid functional group containing aliphatic monomers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.