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

1994-08-12

1995-11-28

Bowers, Jr., Charles L.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Antihalation or filter layer containing

430510, 430517, G03C 106, G03C 1815, G03C 1825

Patent

active

054706955

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, and R.sup.3 are each independently hydrogen, substituted or unsubstituted alkyl, or substituted or unsubstituted alkoxy. At least one of R.sup.1, R.sup.2 and R.sup.3 is substituted or unsubstituted alkoxy, or two of R.sup.1, R.sup.2 and R.sup.3 together consist of --O--L--O-- and form a ring condensed with the phenyl ring to which they are attached wherein L is an alkylene linking group. R.sup.4, R.sup.5, R.sup.6, and R.sup.7 are each independently hydrogen, substituted or unsubstituted alkyl, or substituted or unsubstituted aryl. R is a carboxy or sulfonamido substituent, and L.sup.1, L.sup.2 and L.sup.3 are each independently substituted or unsubstituted methine groups. 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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