Optical brightening agents and photographic materials which cont

Details Optical brightening agents and photographic materials which cont Optical brightening agents and photographic materials which cont

1981-04-06

1982-06-22

Brown, J. Travis

Radiation imagery chemistry: process, composition, or product th

Radiation sensitive product

Identified backing or protective layer containing

430139, 430539, 430933, 430950, G03C 176

Patent

active

043363261

ABSTRACT:
New optical brightening agents and photographic materials which contain in at least one layer these brightening agents are provided. The compounds have the general formula ##STR1## wherein R.sub.1 and R.sub.3 are hydrogen or methyl, R.sub.2 and R.sub.4 are alkyl R.sub.5 is hydrogen, alkyl, aryl, aralkyl, X is --NH--, --O-- or --S--, L.sub.1 and L.sub.2 are alkylene oxide chains and M.sup..sym. is a hydrogen or an alkali metal cation.
These brightening agents enhance the brightness in the white areas of photographic print materials.

REFERENCES:
patent: 3127270 (1964-03-01), Wilson
patent: 3676139 (1972-07-01), Amano et al.
patent: 3677762 (1972-07-01), Amano et al.
patent: 3743531 (1973-07-01), Ducharme
patent: 3867376 (1975-02-01), Guenter et al.

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