Stable concentrated liquid preparation of paper dyes of the disazo class
US4098569A · kind A · utility
2Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 30, 1976 |
| Grant date | Jul 4, 1978 |
| Priority date | — |
| Expiry date | Jun 30, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/919
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
There is described a stable concentrated liquid preparation of paper dyes which preparation contains 15 to 40 per cent by weight of certain anionic disazo dyes of the formula ##STR1## dissolved in 40 to 80 per cent by weight of a diethylene glycol monoalkyl ether, optionally in admixture with up to 30 per cent by weight of a mono-, di-, tri- or tetraalkylene glycol, and the use of this liquid preparation for the dyeing and printing of paper, semi-cardboard and cardboard.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.