Process for the aqueous dyeing of natural polyamide fibres using reactive dyes and assistant mixture of quaternary ammonium polyglycol, acid ester of polyglycol and fatty alcohol polyglycol ether
US4935033A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 21, 1988 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Sep 21, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/917
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Natural polyamide fibres, in particular wool, are dyed by means of reactive dyes using the exhaust method in the presence of a dyeing assistant consisting of a combination of (a) quaternized ammonium compounds of polyglycol compounds and (b) of acidic esters or salts thereof derived from at least dibasic oxyacids and from polyglycol compounds, both the quaternary ammonium compounds and the acidic esters being derived from an aliphatic amine having 12 to 24 carbon atoms in the aliphatic moiety. The process comprises carrying out the dyeing in the additional presence of (c) a fatty alcohol/polyalkylene glycol ether of the formula EQU R-O-(alkylene-O.sub.m H (1) in which R is an aliphatic radical having at least 8 carbon atoms, "alkylene" is an ethylene radical or propylene radical and m is 3 to 25.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.