Substituted phenoxy-3-chloro-malealdehydic acids

Details Substituted phenoxy-3-chloro-malealdehydic acids Substituted phenoxy-3-chloro-malealdehydic acids

1970-07-09

1976-05-04

Terapane, John F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260519, C07C 6518

Patent

active

039548538

ABSTRACT:
Tanning (hardening) agents in a colloid layer of gelatin or the like are inactive at ordinary temperatures but are activated at temperatures above 70.degree.C. to rapidly tan the colloid in which they are incorporated. Suggested uses are in thermography and photography. Specific examples describe various gelatin layers containing the heat-activated hardeners. The class of useful tanning agents is described by the formula ##SPC1##
Wherein the substituents R and R' are selected from hydrogen and halogen atoms and alkyl, carboxyl, alkoxy, formyl, tertiary amino and sulfo radicals. Some specific new compounds of this class are described.

REFERENCES:
martin, Chem. Abst., 61, 2414c (1964).
Mowry, J. Am. Chem. Soc., 75, 1909 (1953).
Wasserman et al., ibid, 75, 2527 (1953).

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