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

1988-12-23

1990-08-21

Michl, Paul R.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Two or more radiation-sensitive layers containing other than...

430512, 430517, G03C 100

Patent

active

049505866

ABSTRACT:
Solid particle dispersions of dyes according to the formula: ##STR1## are useful as filter dyes in photographic elements. In this formula, n is 0 or 1. R.sub.1 and R.sub.2 are each independently substituted or unsubstituted alkyl or substituted or unsubstituted aryl, or taken together with R.sub.6, R.sub.7, N and the atoms to which they are attached, represent the atoms necessary to complete a julolydyl ring.
R.sub.3 is H, substituted or unsubstituted alkyl, or substituted or unsubstituted aryl.
R.sub.4 and R.sub.5 each independently represents H, substituted or unsubstituted alkyl, substituted or unsubstituted aryl, secondary or tertiary amino, CO.sub.2 H, or NHSO.sub.2 R.sub.8, with the proviso that at least one of R.sub.4 and R.sub.5 or a substituted on an aryl ring in R.sub.4 and R.sub.5 is CO.sub.2 H or NHSO.sub.2 R.sub.8. R.sub.8 is substituted or unsubstituted alkyl or substituted or unsubstituted aryl.
R.sub.6 and R.sub.7 independently represents H, or R.sub.7 taken together with R.sub.2, or R.sub.6 taken together with R.sub.1, represent the atoms necessary to complete a heterocyclic ring.

REFERENCES:
patent: 4092168 (1978-05-01), Lemahieu et al.
patent: 4294916 (1981-10-01), Postle et al.
patent: 4294917 (1981-10-01), Postle et al.
patent: 4420555 (1983-12-01), Krueger et al.

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