High dye stability, high activity, low stain and low viscosity small particle yellow dispersion melt for color paper and other photographic systems
US5358831A · kind A · utility
4Cited by
21References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1990 |
| Grant date | Oct 25, 1994 |
| Priority date | — |
| Expiry date | Dec 13, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S516/06
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
This invention provides composition and method to overcome the very high viscosity of prior small-particle dispersions when admixed with gelatin in aqueous solution for coating a photographic film element. The invention is generally accomplished by the utilization of a second surfactant in the melt formulated by the admixture of the small-particle dispersion and the gelatin solution. The surfactants of this invention, that is, utilized to control the theology of such said melts, have the following general structure: ##STR1## wherein n=5 to 20 and PA1 x=1 to 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.