Process for improving the photochemical stability of dyeings on polyester fibre materials
US4895981A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1989 |
| Grant date | Jan 23, 1990 |
| Priority date | — |
| Expiry date | Mar 24, 2009 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P3/54
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A process is described for improving the photochemical stability of dyeings on polyester fibre materials by means of UV absorbers of the formula ##STR1## in which R is alkyl, alkoxy, halogen or hydroxyl, R.sub.1 is alkyl, R.sub.2 is hydrogen, halogen, alkyl, alkylamino, hydroxyalkylamino, aralkylamino, alkoxyalkylamino, alkenyl, alkoxy, alkoxy which is substituted by hydroxyl, carboxyl or C.sub.2 -C.sub.5 alkoxycarbonyl, alkenyloxy, phenyl or phenyl which is substituted by halogen, alkyl, hydroxy-C.sub.1 -C.sub.4 alkyl, alkenyloxy, alkoxy, hydroxyl or carboxy-C.sub.1 -C.sub.4 alkoxy, m is 0 or 1 and n is 0, 1 or 2, and also novel compounds of the formula (1) in which m and n are both 0 and R.sub.2 is alkylamino, hydroxyalkylamino, aralkylamino or alkoxyalkylamino.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.