Process for dyeing paper
US4515599A · kind A · utility
4Cited by
5References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 9, 1983 |
| Grant date | May 7, 1985 |
| Priority date | — |
| Expiry date | Sep 9, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/919
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for dyeing paper which comprises the use of dyes of the formula ##STR1## wherein R is hydrogen, hydroxyl or amino, X is the azoxy or azo group, and n is 1 or 2, and the bonds of the complexing oxygen atom in the .alpha.-position and of the azo group in the .beta.-position at the naphthalene nuclei are mutually interchangeable. Dyeings of good wetfastness and lightfastness are obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.