Solid particle dispersions of filter dyes for photographic eleme

Details Solid particle dispersions of filter dyes for photographic eleme Solid particle dispersions of filter dyes for photographic eleme

1993-03-01

1993-11-30

Brammer, Jack P.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Antihalation or filter layer containing

430510, G03C 106

Patent

active

052664546

ABSTRACT:
Solid particle dispersions of dyes according to the formula: ##STR1## wherein D is selected from the group consisting of ##STR2## are disclosed as filter dyes for photographic elements. In this formula, R.sup.1, R.sup.2, R.sup.3, and R.sup.4 are each independently hydrogen, substituted or unsubstituted alkyl, or substituted or unsubstituted aryl. R is a carboxy or sulfonamido substituent. L.sup.1 through L.sup.5 are each independently substituted or unsubstituted methine groups, and m is 0 or 1. The dyes of the invention are particularly useful as filter dyes for light in the ultraviolet and short blue wavelength regions of the spectrum.

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85 193809 (C) WPIL/Derwent Week 8532.

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