Sulfonated xanthene dyes, and photographic products and processe

Details Sulfonated xanthene dyes, and photographic products and processe Sulfonated xanthene dyes, and photographic products and processe

1992-04-28

1993-11-23

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

Transfer procedure between image and image layer, image...

Diffusion transfer process, element, or identified image...

430236, 430446, 430517, 430520, G03C 554, G03C 184

Patent

active

052643220

ABSTRACT:
Xanthene derivatives having cations of the formula: ##STR1## in which X is an --SO.sub.2 --N(R.sup.6)--COR.sup.7 or --SO.sub.2 --N(R.sup.6 --CO.sub.2 (CH.sub.2).sub.2 Y grouping, wherein R.sup.6 is an alkyl group containing not more than about 6 carbon atoms, R.sup.7 is an alkyl or aryl group containing not more than about 10 carbon atoms and Y is an electron-withdrawing group; Z is a hydrogen atom or an --SO.sub.2 --N(R.sup.1)--R.sup.2 --NR.sup.3 R.sup.4 R.sup.5 grouping; R.sup.1 is hydrogen or an alkyl group containing not more than about 6 carbon atoms; R.sup.2 is an alkylene group containing from 2 to about 10 carbon atoms; R.sup.3 and R.sup.4 are each independently an alkyl group containing not more than about 6 carbon atoms, and R.sup.5 is a hydrogen atom or an alkyl group containing not more than about 6 carbon atoms, are useful as light-screening dyes in photographic products and processes.

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