Dyeing assistant composition containing organic amines and carboxylic acids for coloring polyester material with acid dyes
US3932126A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 5, 1973 |
| Grant date | Jan 13, 1976 |
| Priority date | — |
| Expiry date | Oct 5, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/933
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process is disclosed for coloring a polyester material, which comprises impregnating the same by padding, printing or cascading with an aqueous solution or printing paste of one or more acid dyes incorporated with both (a) an organic nitrogen compound and (b) an organic carboxylic acid, drying the impregnated polyester material and then exposing same to dry heat at a temperature between 150.degree.C. and 230.degree.C. for a period of 5 to 60 seconds, thereby effecting fixation of said acid dye or dyes on the polyester material and uniform distribution thereof within the polyester material. The organic nitrogen compound with which the polyester material is treated is an alkyleneamine, an alkanolamine, or an alkylamine. Suitable lengths (in the direction of travel) of the polyester yarn or other form of polyester material undergoing the said impregnation is contacted in a precise, controlled manner according to a predetermined pattern to produce any desired variegated pattern contour in the final dyed polyester material. The process is preferably carried out continuously. The acid-dyed polyester material in various forms is also a part of the invention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.