Liquid crystalline filter dyes for imaging elements
US6355386B1 · kind B1 · utility
16Cited by
10References
43Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 16, 2000 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Oct 16, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/22
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention is a dispersion comprising a solvent having dispersed therein a liquid-crystal forming dye of structural Formula I:[D—(X)m]—(Y)n  Iwherein:D is a merocyanine dye;each Y contains an ionic or a nonionic solubilizing substituent or a group with a pKa value of less than 4 in water;each X is a nonionic substituent;n is 1 to 10;m is 0-10; andthe resulting dye forms a liquid-crystalline phase in solvent.The dispersion is particularly useful in imaging and photographic elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.