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    COMPOSITION FOR THE PRETANNING OF PELTS
    2.
    发明公开
    COMPOSITION FOR THE PRETANNING OF PELTS 有权
    组成预毛皮

    公开(公告)号：EP1694874A1

    公开(公告)日：2006-08-30

    申请号：EP04791169.8

    申请日：2004-10-07

    Applicant: TFL Ledertechnik GmbH

    Inventor： LAUTON, Alain ,  HERRMANN, Wolfgang ,  FENNEN, Jens ,  GABAGNOU, Catherine

    IPC: C14C3/16

    CPC classification number: C14C3/16

    Abstract: Compositions comprising a) 5 to 50% by weight of an aliphatic dialdehyde having 2 to 10 carbon atoms; b) 2.5 to 20% by weight of at least one reductive saccharide having a dextrose equivalent of 10 to 100; c) 2.5 to 20% by weight of at least one water-soluble, optionally monoetherified polyoxaalkylene glycol having a molecular weight of more than 100 and not more than 2000; and d) 90 to 10% by weight of water, 0.05 to 0.19 mole of the components b) and c) being added per mole of the component a), outstandingly suitable for the pretanning of pelts and subsequent production of leathers free of heavy metals.

    COMPOSITION FOR THE TREATMENT OF LEATHER
    5.
    发明授权
    COMPOSITION FOR THE TREATMENT OF LEATHER 有权
    组合物技术的皮革处理

    公开(公告)号：EP1831405B1

    公开(公告)日：2009-03-11

    申请号：EP05850465.5

    申请日：2005-12-16

    Applicant: TFL Ledertechnik GmbH

    Inventor： LAUTON, Alain ,  DIREK, Aykut

    IPC: C14C3/20 ,  C14C3/28 ,  C07C317/22

    CPC classification number: C14C3/28 ,  C14C3/20

    Abstract: Process for the treatment of wetwhite, wetblue or vegetable pretanned leather, characterized in that - for the purpose of said treatment - a composition containing a) 1 - 95% by weight of a product of the reaction of a phenol and a sulphonating agent, the molar ratio (phenol):(SO3) being (1 ):(1.1-2.2), b) 1 - 95% by weight of a product of the reaction of a naphthalenesulphonic acid and formaldehyde, and c) 5 - 50% by weight c1) of a formaldehyde condensate of a dihydroxydiarylsulphonic acid with aryl- or (hydroxy)arylsulphonic acid and/or c2) of a urea/formaldehyde condensate of a phenol and phenolsulphonic acid, the sum of the components a), b), c1) and/or c2) being 100% by weight, is added in the form of an aqueous solution to the aqueous liquor, and, if adjusted to a concentration of 50%, is added to the liquor in an amount of 1 - 20% by weight, based on the shaved weight of the hides or skins as the substrate, is added to the liquor after the first tanning and before the subsequent treatment, which includes one or more of the steps retanning, dyeing and fatliquoring, and without a neutralizing step and without a liquor change; and the leathers obtained by this process or obtained using said composition.

    LEATHER TREATMENT AND AGENT
    6.
    发明公开
    LEATHER TREATMENT AND AGENT 有权
    皮革处理和手段

    公开(公告)号：EP1954840A1

    公开(公告)日：2008-08-13

    申请号：EP06830144.9

    申请日：2006-11-27

    Applicant: TFL Ledertechnik GmbH

    Inventor： STRIJBOS, Leonardus

    IPC: C14C9/00

    CPC classification number: C14C9/00

    Abstract: D-Isoascorbic acid or one of its salts, as such or as a constituent of a liquid or solid formulation, is an effective agent for reducing the amount of Cr(VI) compounds in leathers tanned with Cr(III) salts by treatment of the leather in an aqueous liquor after tanning or finishing or of a commodity article with an aqueous solution.

    DYED LEATHER AND METHOD FOR DYEING TANNED LEATHER
    7.
    发明公开
    DYED LEATHER AND METHOD FOR DYEING TANNED LEATHER 有权
    色皮革和方法处理染料鞣革股票

    公开(公告)号：EP1322813A1

    公开(公告)日：2003-07-02

    申请号：EP01962972.4

    申请日：2001-08-27

    Applicant: TFL Ledertechnik GmbH

    Inventor： MCHUGH, Jon, Louis ,  FENNEN, Jens ,  PAGE, Campbell,Thomas

    IPC: D06P3/32 ,  D06P1/651 ,  D06P1/645

    CPC classification number: C14C9/02 ,  D06P1/0032 ,  D06P1/008 ,  D06P1/645 ,  D06P1/65112 ,  D06P1/65131 ,  D06P1/673 ,  D06P3/32

    Abstract: Tanned leather is (a) pretreated in an aqueous and alkaline medium either with ammonia, primary amines or a mixture of ammonia and primary amines and then with a polyfunctional organic compound containing at least one aldehyde group as a functional group, or (b) in an aqueous and acidic medium with a polyfunctional organic compound and then ammonia, primary amines or a mixture of ammonia and primary amines, and (c) then dyed in an aqueous and alkaline medium with a water-soluble dye containing at least one functional group which is capable of reacting with one of the functional groups of the organic compound, forming a covalent bond. A tanned and dyed leather is obtainable with a high colour intensity, outstanding wet fastness and excellent grain tightness, wherein the dye is permanently and covalently bonded to the leather via a bridging group, preferably in the region of the surface, and the bridging group is essentially bonded to the leather via -N=CH- groups.

    ZUSAMMENSETZUNG UND VERFAHREN ZUR GERBUNG BASIEREND AUF EINEM ACETAL EINES ALDEHYDISCHEN GERBSTOFFES
    9.
    发明公开
    ZUSAMMENSETZUNG UND VERFAHREN ZUR GERBUNG BASIEREND AUF EINEM ACETAL EINES ALDEHYDISCHEN GERBSTOFFES 审中-公开

    公开(公告)号：EP3561081A1

    公开(公告)日：2019-10-30

    申请号：EP19167730.1

    申请日：2017-03-29

    Applicant: TFL Ledertechnik GmbH

    Inventor： Gabagnou, Catherine ,  Schulte-Gauczinski, Nina ,  Herta, Grigore Daniel ,  Fennen, Jens

    IPC: C14C3/16

    Abstract: Die Erfindung betrifft eine Zusammensetzung enthaltend ein Acetal eines aldehydischen Gerbstoffs zum Gerben von Häuten und/oder Fellen sowie ein Verfahren zur Gerbung von Häuten und/oder Fellen zur Herstellung von Leder, wobei ein Acetal eines aldehydischen Gerbstoffes verwendet wird. Durch Absenken des pH-Wertes kann der aldehydische Gerbstoff freigesetzt werden, wodurch ein Gerbungsschritt eingeleitet wird. Die erfindungsgemäße Zusammensetzung und das erfindungsgemäße Verfahren zeichnen sich durch eine geringere Toxizität gegenüber konventionellen Zusammensetzungen und Gerbungsverfahren aus, die auf aldehydischen Gerbstoffen beruhen. Ferner ist eine verbesserte Penetration der Gerbstoffe in tiefere Schichten der Haut und/oder des Felles möglich, so dass eine besonders homogene Gerbung erreicht wird.

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