Aqueous phosphate pigment dispersions
US4750938A · kind A · utility
11Cited by
6References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 12, 1986 |
| Grant date | Jun 14, 1988 |
| Priority date | — |
| Expiry date | Nov 12, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC13K11/00
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
This invention relates to a aqueous phosphate pigment dispersion usable for sugar or film coating tablets and the like, comprising like pigment particles, a polymeric colloid, a phosphate viscosity lowering agent which permits a higher concentration of pigment particles in the pigment suspension, and an aqueous solvent. A typical pigment suspension comprises FD&C pigment, a natural gum as the polymeric colloid, a polyphosphate as the viscosity lowering agent and water as the aqueous solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.