Dye incorporated pigments and products made from same
US5871872A · kind A · utility
58Cited by
10References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 30, 1997 |
| Grant date | Feb 16, 1999 |
| Priority date | — |
| Expiry date | May 30, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/90
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The adsorption of anionic dyes on nanosize alumina modified silica particles to form colored pigments is disclosed. The dyes are chemisorbed and their uptake is controlled by the strong chemical reaction between positive surface of the absorbent and negative charge of the adsorbates. The prepared pigments are useful in the formation of color films and their optical properties are described. Photoresists using nanosized pigments are also disclosed herein which are useful in making color filters for liquid crystal displays.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.