Concentrated aqueous solutions of 2-phenylbenzothiazoleazo dyes with mixed cations
US5173086A · kind A · utility
7Cited by
6References
4Claims
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Key dates
| Filing date | Sep 12, 1991 |
| Grant date | Dec 22, 1992 |
| Priority date | — |
| Expiry date | Sep 12, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S8/919
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Aqueous solutions containing, each percentage being based on the weight of the aqueous solution, PA0 a) from 5 to 20% by weight of the dye of the formula ##STR1## (calculated as free acid) where cat.sup..sym. is a mixture of cations comprising from 5 to 50 mol % of lithium ions, from 5 to 40 mol % of diethanolammonium ions and from 20 to 90 mol % of triethanolammonium ions, and PA0 b) from 0 to 15% of urea, are useful for dyeing paper stock.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.