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    • 8. 发明授权
    • Tanning agent and curing agent based on dialdehydes
    • 鞣剂和基于二醛的固化剂
    • US07354457B2
    • 2008-04-08
    • US10511279
    • 2003-05-02
    • Stephan HuefferGunther PabstTilman Luedecke TaegerStefan SchroederGerhard Wolf
    • Stephan HuefferGunther PabstTilman Luedecke TaegerStefan SchroederGerhard Wolf
    • C14C3/08
    • C07C45/72C14C3/16
    • Tanning agents can be prepared by reacting at least one aldehyde of formula I, with at least one further identical or different aldehyde of formula I, where Z is a single chemical bond, unsubstituted or substituted C1-C12-alkylene, unsubstituted or substituted C5-C12-cycloalkylene or unsubstituted or substituted C6-C14-arylene, the reaction being carried out in the presence of an acidic catalyst and in the presence of at least one further carbonyl compound of formula II where R1 to R4, independently of one another, are hydrogen, unsubstituted or substituted C1-C12-alkyl, unsubstituted or substituted C3-C12-cycloalkyl, unsubstituted or substituted C7-C13-aralkyl or unsubstituted or substituted C6-C14-aryl, with the proviso that, where Z is a single chemical bond or a radical without a-hydrogen atoms, at least one further aldehyde of the formula I, in which Z contains α-hydrogen atoms, or at least one further carbonyl compound of formula II is present.
    • 鞣制剂可以通过使至少一种式I的醛与至少一种其它相同或不同的式I的醛反应来制备,其中Z是单个化学键,未取代或取代的C 1 -C 未取代或取代的C 1 -C 12 - 亚烷基,未取代或取代的C 5 -C 12 - 亚环烷基或未取代或取代的C 6 -C 该反应在酸性催化剂的存在下进行,并且在至少一种另外的式II的羰基化合物的存在下进行,其中R 1至R 4 - 彼此独立地为氢,未取代或取代的C 1 -C 12 - 烷基,未取代或取代的C 3 - 未取代或取代的C 7 -C 13 - 芳烷基或未取代或取代的C 6 - 其中Z是单一化学键或没有氢原子的基团,至少一个 存在式I的另外的醛,其中Z包含α-氢原子,或至少一种另外的式II的羰基化合物。