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    • 31. 发明申请
    • Method for producing leather
    • US20070022541A1
    • 2007-02-01
    • US10529744
    • 2003-10-14
    • Tilman TaegerGunther PabstPhilippe LamalleStephan HufferStefan Schroeder
    • Tilman TaegerGunther PabstPhilippe LamalleStephan HufferStefan Schroeder
    • C14C1/06
    • C14C1/065
    • Leather is produced by a process comprising at least two of the following process steps A) to D): A) use of one or more polyelectrolytes in the production of semifinished products or intermediate products, comprising the addition of one or more polyelectrolytes in at least one of the steps (a) to (d) (a) together with from 0 to 1.5% by weight, based on the salted weight, of lime, immediately before or during liming, (b) before or during deliming, (c) before or during bating, (d) together with, altogether, from 0 to 3% by weight, based on the pelt weight, of alkali metal or alkaline earth metal salt, immediately before or during pickling; B) treatment of the hides during liming in an aqueous liquor with one or more compounds of the formula B.1  or the corresponding alkali metal, alkaline earth metal, ammonium or phosphonium salts thereof, R10 and X1 to X4 having the meanings stated in the description, with the proviso that at least two mercapto groups are present in the compound or the compounds B.1; C) use of degreasing agents of the formula C.1  for degreasing pelts, hides or other intermediate stages and semifinished products in leather production, n and R16 to R21 having the meanings stated in the description; D) tanning with the use of a tanning agent which can be prepared by reacting at least one aldehyde of the formula D.1,  with at least one further identical or different aldehyde of the formula D.1 in the presence of an acidic catalyst and optionally in the presence of at least one further carbonyl compound of the formula D.2  Z and R22 to R25 having the meanings stated in the description, with the proviso that, when Z corresponds to a single chemical bond or a radical without α-hydrogen atoms, at least one further aldehyde of the formula D.1, in which Z contains α-hydrogen atoms, or at least one further carbonyl compound of the formula D.2 is present.
    • 32. 发明申请
    • Method for producing leather
    • 生产皮革的方法
    • US20060130241A1
    • 2006-06-22
    • US10544138
    • 2004-01-29
    • Stephan HufferGerhard WolfMatthias KlugleinMatthias Kroner
    • Stephan HufferGerhard WolfMatthias KlugleinMatthias Kroner
    • C14C1/00
    • C14C3/22
    • In a process for the production of leather, pelts, pickled pelts or semifinished products are treated with at least one polymer which is obtainable by copolymerization of at least one ethylenically unsaturated dicarboxylic anhydride (A), derived from at least one dicarboxylic acid of 4 to 8 carbon atoms, at least one vinylaromatic compound (B) and optionally at least one ethylenically unsaturated monomer (C) which differs from (A) and has a hetero atom, reaction with at least one compound (D) of the formula Ia or Ib at least 0.55 equivalent, based on (A), of (D) being used, and optionally hydrolysis with water or aqueous alkaline solution, where, in formulae Ia and Ib, the variables are defined as follows: A1 are identical or different and are C2-C6-alkylene R1 is linear or branched C1-C20-alkyl, and n is an integer from 6 to 200.
    • 在制造皮革的方法中,用至少一种聚合物处理皮毛,腌制的皮毛或半成品,所述聚合物可通过至少一种衍生自至少一种二羧酸4的烯属不饱和二羧酸酐(A)与 8个碳原子,至少一个乙烯基芳族化合物(B)和任选的至少一种不同于(A)并具有杂原子的烯属不饱和单体(C),与式Ia或Ib的至少一种化合物(D)反应 至少0.55当量,基于(A),(D)使用,并且任选地用水或碱性水溶液水解,其中在式Ia和Ib中,变量定义如下: SUP>相同或不同,为C 2 -C 6 - 亚烷基R 1是直链或支链C 1〜 -C 20 - 烷基,n为6〜200的整数。