Aqueous lake pigment suspension
US4652313A · kind A · utility
18Cited by
11References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 1984 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | Oct 24, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D17/001
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
This invention relates to a pigment suspension usable for film coating tablets and the like, comprising lake pigment particles, a polymeric colloid, a viscosity lowering agent, which permits a higher concentration of pigment particles in the pigment suspension, and an aqueous solvent. A typical pigment suspension comprises a lake pigment, titanium dioxide, a natural gum, sodium tartrate, and water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.