专利名称：Substituted phenoxy-3-chloro-malealdehydic acids
发明人：Rene Jean Dennilauler,Maurice Edgar
Pfaff,Pierre Amedee Roman
申请号：US05/061017申请日：19700709公开号：US03954853A公开日：19760504
摘要：Tanning (hardening) agents in a colloid layer of gelatin or the like are inactive atordinary temperatures but are activated at temperatures above 70°C. to rapidly tan thecolloid in which they are incorporated. Suggested uses are in thermography andphotography. Specific examples describe various gelatin layers containing the heat-activated hardeners. The class of useful tanning agents is described by the formula
WHEREIN THE SUBSTITUENTS R and R' are selected from hydrogen and halogenatoms and alkyl, carboxyl, alkoxy, formyl, tertiary amino and sulfo radicals. Some specificnew compounds of this class are described.
申请人：EASTMAN KODAK COMPANY
代理人：C. O. Thomas
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