Process for fixing dyes in textile materials
US5525125A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 8, 1995 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | May 8, 2015 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P3/241
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process for fixing dyes impregnated in fine-dimensional synthetic textile substrates in an environmentally safe manner. The process comprises contacting the dyed synthetic substrates with an aqueous solution of a phenol- and formaldehyde-free dye-fixative composition containing a copolymer of PA1 a) 1.0 to about 20 percent by weight of vinyl sulfonic acid residues; PA1 b) 5 to 20 percent by weight of nonpolar or hydrophobic monomer residues; and PA1 c) 60 to about 94 percent by weight of hydrophilic ethylenically unsaturated carboxylic acid residues, the copolymers having a weight average molecular weight of from about 1,500 to about 15,000. The contacting step is for a time sufficient so that the dye-fixative composition is absorbed by the fabric.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.