Photographic elements containing filter dye particle dispersions

Details Photographic elements containing filter dye particle dispersions Photographic elements containing filter dye particle dispersions

1988-12-23

1990-02-13

Brammer, Jack P.

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Antihalation or filter layer containing

430512, 430517, 430591, G03C 184

Patent

active

049006533

ABSTRACT:
Dyes according to the formula: ##STR1## are useful as filter dyes in photographic elements. In this formula, n is 1 or 2. R.sub.1 and R.sub.2 are each independently substituted or unsubstituted alkyl or substituted or unbsubstituted aryl, or together represent the atoms necessary to complete a substituted or unsubstituted 5- or 6-membered ring. Also, if R.sub.7 is substituted or unsubstituted alkyl, R.sub.1 is H.
R.sub.3 is substituted or unsubstituted alkyl or 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.6, with the proviso that at least one of R.sub.4, R.sub.5, or a substituent on an aryl ring in R.sub.3, on an aryl ring in R.sub.4 or R.sub.5, on an aryl ring in R.sub.1 or R.sub.2, or on an aryl ring formed by R.sub.1 and R.sub.2 is CO.sub.2 H or NHSO.sub.2 R.sub.6. R.sub.6 is substituted or unsubstituted alkyl or substituted or unsubstituted aryl. R.sub.7 is substituted or unsubstituted alkyl, or together with R.sub.8 forms a double bond. R.sub.8 is H or together with R.sub.7 forms a double bond.

REFERENCES:
patent: 2538009 (1949-09-01), Keyeo et al.
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: 4309500 (1982-01-01), Shishido
patent: 4420555 (1983-12-01), Krueger et al.

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