Process for dyeing fibers or fabrics of aromatic polyamides
US3953167A · kind A · utility
7Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 16, 1974 |
| Grant date | Apr 27, 1976 |
| Priority date | — |
| Expiry date | Jul 16, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/925
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
Aromatic polyamide fibers or fabrics are dyed in a deep and brilliant color with good light fastness by impregnating the fibers or fabrics with (a) a cationic dye, (b) an aliphatic hydroxy compound having a boiling point of at least 180.degree.C., (c) at least one swelling agent selected from o-phenylphenol, p-phenylphenol, benzophenone, .alpha.-naphthol and .beta.-naphthol and (d) at least one of alkali metal salts or ammonium salts of inorganic or organic acids, the amount of the salt being 1 to 10% by weight based on the sum total of the amounts of (a), (b), (c) and (d), and then heat-treating the fibers or fabrics with steam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.