Dyeing preparations containing boric acid for preparing water-insoluble azo dyestuffs on fiber
US4035144A · kind A · utility
2Cited by
4References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 8, 1975 |
| Grant date | Jul 12, 1977 |
| Priority date | — |
| Expiry date | Jul 8, 1995 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06P1/12
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
New improved dyeing preparations (formulations) have been found for preparing water-soluble azo dyestuffs on fiber according to ice-color dyeing which contain a diazonium or tetrazonium compound of an aromatic mono- or diamine having a pKa-value of more than 2.5 as well as boric acid instead of the usual aluminum sulfate or chromium (III)-acetate. These new dyeing compositions have the same good properties as comparable known dyeing preparations but avoid the severe disadvantages of the known preparations in respect to requirements in industrial medicine and ecology.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.