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    TANNING AGENT, ITS PREPARATION AND ITS USE FOR RETANNING
    11.
    发明专利
    TANNING AGENT, ITS PREPARATION AND ITS USE FOR RETANNING 未知

    公开(公告)号：CA1109875A

    公开(公告)日：1981-09-29

    申请号：CA336435

    申请日：1979-09-26

    Applicant: BASF AG

    Inventor： LACH DIETRICH

    IPC: C08G12/04 ,  C08G16/02 ,  C14C3/18 ,  C07C101/48 ,  C07C143/56

    Abstract: Mineral tanned leather is frequently retanned with synthetic tanning agents to improve the fullness and softness, but leather retanned by the prior art methods is difficult to dye in full shades with anionic dyes. According to the invention, condensation products of C1-4 aldehydes with certain aromatic sulfonic acids or carboxylic acids containing amino groups are employed for retanning, thereby improving the receptivity of the leather for anionic dyes. These acids have the general formula where X and X' are independently H, -CH2-SO3H or -CH2-OH, A is a benzene radical, Y and Z are independently H, -SO3H or -CO2H, R is H or C1-4-alkyl and n is from 0 to 10, with the proviso that at least one sulfonic acid or carboxyl group is present in the molecule.

    AGENTS FOR AND PROCESSES OF SOAKING HIDES
    12.
    发明专利
    AGENTS FOR AND PROCESSES OF SOAKING HIDES 未知

    公开(公告)号：AU6254780A

    公开(公告)日：1981-04-09

    申请号：AU6254780

    申请日：1980-09-19

    Applicant: BASF AG

    Inventor： HAHN ERWIN ,  LACH DIETRICH ,  STREICHER ROLF

    IPC: C14C1/04 ,  C07C161/05

    Abstract: An auxiliary for the soaking of hides and skins, which consists of a salt of the formula I M+[O3S-S-R]- I where R is an organic radical of 1 to 8 carbon atoms, which may carry one or more functional groups, and M+ is one equivalent of a cation, mixtures thereof with other conventional soaking auxiliaries, and processes for their use. Using the novel auxiliary avoids all toxicity hazards and odor nuisance, as well as avoiding oxidation losses, and achieves good loosening of the hair.

    AGENTS FOR AND PROCESSES OF SOAKING HIDES
    16.
    发明专利
    AGENTS FOR AND PROCESSES OF SOAKING HIDES 未知

    公开(公告)号：AU532669B2

    公开(公告)日：1983-10-06

    申请号：AU6254780

    申请日：1980-09-19

    Applicant: BASF AG

    Inventor： HAHN ERWIN ,  LACH DIETRICH ,  STREICHER ROLF

    IPC: C14C1/04 ,  C07C161/05

    Abstract: An auxiliary for the soaking of hides and skins, which consists of a salt of the formula I M+[O3S-S-R]- I where R is an organic radical of 1 to 8 carbon atoms, which may carry one or more functional groups, and M+ is one equivalent of a cation, mixtures thereof with other conventional soaking auxiliaries, and processes for their use. Using the novel auxiliary avoids all toxicity hazards and odor nuisance, as well as avoiding oxidation losses, and achieves good loosening of the hair.

    PREPARATION OF A TANNING AGENT
    17.
    发明专利
    PREPARATION OF A TANNING AGENT 未知

    公开(公告)号：IN151992B

    公开(公告)日：1983-09-17

    申请号：IN1034CA1979

    申请日：1979-10-06

    Applicant: BASF AG

    Inventor： LACH DIETRICH

    IPC: C08G12/04 ,  C08G16/02 ,  C14C3/18 ,  C14C3/00

    Abstract: Mineral tanned leather is frequently retanned with synthetic tanning agents to improve the fullness and softness, but leather retanned by the prior art methods is difficult to dye in full shades with anionic dyes. According to the invention, condensation products of C1-4 aldehydes with certain aromatic sulfonic acids or carboxylic acids containing amino groups are employed for retanning, thereby improving the receptivity of the leather for anionic dyes. These acids have the general formula where X and X' are independently H, -CH2-SO3H or -CH2-OH, A is a benzene radical, Y and Z are independently H, -SO3H or -CO2H, R is H or C1-4-alkyl and n is from 0 to 10, with the proviso that at least one sulfonic acid or carboxyl group is present in the molecule.

    DELIMING OF HIDES
    18.
    发明专利
    DELIMING OF HIDES 未知

    公开(公告)号：AU4786179A

    公开(公告)日：1979-12-13

    申请号：AU4786179

    申请日：1979-06-07

    Applicant: BASF AG

    Inventor： HAHN ERWIN ,  LACH DIETRICH ,  MAGERKURTH BERNHARD ,  WUERTELE LOTHAR

    IPC: C14C1/08

    Abstract: A process for deliming hides, in which, instead of using conventional acids or acid salts, esters which hydrolyze under the conventional deliming conditions are employed. This avoids the disadvantages associated with an overdose of conventional deliming agents.

    19.
    发明专利
    未知

    公开(公告)号：DE2825081B1

    公开(公告)日：1979-10-04

    申请号：DE2825081

    申请日：1978-06-08

    Applicant: BASF AG

    Inventor： HAHN ERWIN ,  LACH DIETRICH ,  MAGERKURTH BERNHARD ,  WUERTELE LOTHAR

    IPC: C14C1/08

    Abstract: A process for deliming hides, in which, instead of using conventional acids or acid salts, esters which hydrolyze under the conventional deliming conditions are employed. This avoids the disadvantages associated with an overdose of conventional deliming agents.

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