Substituted phenoxy-3-chloro-malealdehydic acids
    1.
    发明授权
    Substituted phenoxy-3-chloro-malealdehydic acids 失效
    取代的苯氧基-3-氯 - 马来醛酸

    公开(公告)号:US3954853A

    公开(公告)日:1976-05-04

    申请号:US61017

    申请日:1970-07-09

    摘要: 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.

    摘要翻译: 在明胶等的胶体层中的鞣制(硬化)试剂在常温下是无活性的,但是在高于70℃的温度下活化,以迅速使其掺入其中的胶体发生褐变。 建议的用途是在热成像和摄影。 具体实例描述了含有热活化硬化剂的各种明胶层。 有用的鞣剂的类别由下式描述:取代基R和R'选自氢和卤素原子和烷基,羧基,烷氧基,甲酰基,叔氨基和磺基。 描述了这一类具体的新化合物。