Anthraquinone colorant compositions and methods for producing the same
US7632682B2 · kind B2 · utility
2Cited by
24References
31Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 8, 2004 |
| Grant date | Dec 15, 2009 |
| Priority date | — |
| Expiry date | Dec 18, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/13
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention relates to compositions of N,N′-dialkyleneoxy-substituted 1,4-diaminoanthraquinone colorants which contain a low percentage of impurities, to a process to make the compositions, and also to the use of the compositions thus prepared for coloring consumer products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.