Hyperbranched copolyamide, composition based on said hyperbranched copolyamide and method for obtaining same
US6872800B1 · kind B1 · utility
Inventors
Key dates
| Filing date | May 5, 2000 |
| Grant date | Mar 29, 2005 |
| Priority date | — |
| Expiry date | May 5, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L101/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The invention relates to hyperbranched copolyamides (HBPAs), to their production and to their use as additives, in particular as melt viscosity modifiers in thermoplastic polymer compositions.This copolyamide is obtained by a reaction between a monomer (I): A—R—Bf One of the species R or R′ of (I) or (II) is aliphatic, cycloaliphatic or arylaliphatic.For example: A=NH2 and B=COOH or A=COOH and B=NH2 with F=2.A′=NH2 and B′=COOH or A′=COOH and B′=NH2.A—R—B2, e.g.: 5-aminoisophthalic acid or 3,5-diaminobenzoic acid and A′—R′—B′=ε-caprolactam.The yarns, fibres, films and moulded parts obtained using polymer compositions (e.g. PA) to which are added HBPA according to the invention are also included in this invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.