Sulfonated xanthene filter dyes, and photographic products...

Details Sulfonated xanthene filter dyes, and photographic products... Sulfonated xanthene filter dyes, and photographic products...

C - Chemistry, Metallurgy

09

B

C09B 57/00 (2006.01) C07D 405/14 (2006.01) C09B 11/28 (2006.01) G03C 1/83 (2006.01) G03C 8/18 (2006.01) G03C 8/42 (2006.01)

Patent

CA 2061143

Xanthene derivatives having cations of the formula: Image in which X is an -SO2-N(R6)-COR7 or -SO2-N(R6)-CO2(CH2)2Y grouping, wherein R6 is an alkyl group containing not more than about 6 carbon atoms, R7 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 -SO2-N(R1)-R2-NR3R4R5 grouping; R1 is hydrogen or an alkyl group containing not more than about 6 carbon atoms; R2 is an alkylene group containing from 2 to about 10 carbon atoms; R3 and R4 are each independently an alkyl group containing not more than about 6 carbon atoms, and R5 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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