Laked high molecular weight dyes
US4167422A · kind A · utility
31Cited by
11References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1974 |
| Grant date | Sep 11, 1979 |
| Priority date | — |
| Expiry date | Aug 30, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S534/04
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Organic pigment lakes are prepared by adsorption of a high molecular weight or polymeric dye onto suitable substratum or extender therefor. The properties of the resultant polymeric lakes approach those of true pigments, and said lakes exhibit maximized dye loading capacities and are exceptionally free of bleed. Thus, the applicability of lake colors is extended in the various food systems and their use is also permitted as industrial pigments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.