Titanium dioxide dispersions and processes for their production
US4683007A · kind A · utility
4Cited by
3References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 25, 1985 |
| Grant date | Jul 28, 1987 |
| Priority date | — |
| Expiry date | Jun 25, 2005 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61Q3/02
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Dispersions of titanium dioxide pigments with improved long-term resistance to pigment settling and precipitation are disclosed. The pigment dispersions are formed by chemically grafting vinyl and/or acrylic polymers to nitrocellulose in dispersions of nitrocellulose and titanium dioxide pigments. Nitrocellulose forms a loose association with titanium dioxide in dispersion. The chemical grafting improves the precipitation and settling resistance of nitrocellulose, and thus the precipitation and settling resistance of the associated titanium dioxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.