Pigment compositions and processes therefor
US4444592A · kind A · utility
35Cited by
7References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 15, 1982 |
| Grant date | Apr 24, 1984 |
| Priority date | — |
| Expiry date | Nov 15, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B69/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention relates to novel pigmentary products, particularly valuable in the textile art, prepared by using strong acid solvents to solubilize or form fine colloidal dispersions of normally water-insoluble aryl pararosanilines in an aqueous medium. The aryl pararosaniline which is thus solubilized or dispersed is reacted with a heteropoly acid to produce water-insoluble blue-hued pigments. By various modifications in the process, the pigments can be co-precipitated with other pigments and/or dyes to produce pigments or pigment lakes of different shades and intensities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.