1,2,3,4-tetrahydro-5-amino-8-hydroxy-quinolinium compounds

Details 1,2,3,4-tetrahydro-5-amino-8-hydroxy-quinolinium compounds 1,2,3,4-tetrahydro-5-amino-8-hydroxy-quinolinium compounds

G - Physics

03

C

96/32, 260/283.5

G03C 7/30 (2006.01) C07D 215/10 (2006.01) C07D 215/26 (2006.01) C07D 215/38 (2006.01) G03C 5/30 (2006.01)

Patent

CA 1038872

Abstract of the Disclosure A new class of photographic developing agents of the p-aminophenol type are 1, 2, 3, 4-tetrahydro-5-amino- 8-hydroxyquinolinium compounds of the formula: Image wherein R1 is an alkyl group of 1 to 12 carbon atoms; R2 is an alkyl Group of 1 to 12 carbon atoms or a sulfoalkyl group of 1 to 12 carbon atoms, R3 is a hydrogen atom or an alkyl group of 1 to 12carbon atoms, R4 is a hydrogen atom or an alkyl group of 1 to 12 carbon atoms, and X? is an anion with the proviso that when R2 is a sulfoalkyl group then X? is the sulfo radical or R2. These compounds are useful as color developing agents, especially in diffusion transfer processes, and have been round to provide advantageous characteristics as compared with conventional developers of the p-amino- phenol typs, for example, a substantial decrease in the formation of unwanted color stain in the receiving layer employed in diffusion transfer processes.

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