中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

29 records (took 0.024 seconds)

    24.
    发明专利
    未知

    公开(公告)号：IT1193825B

    公开(公告)日：1988-08-24

    申请号：IT2606679

    申请日：1979-09-27

    Applicant: BASF AG

    Inventor： LACH DIETRICH

    IPC: C08G12/04 ,  C08G16/02 ,  C14C3/18 ,  C14C

    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.

    AN IMPROVED PROCESS FOR DYEING BOTH CATIONICALLY TANNED AND/OR ANIONIOALLY TANNED GRAIN LEATHER WITH ANIONIC DYES
    27.
    发明专利
    AN IMPROVED PROCESS FOR DYEING BOTH CATIONICALLY TANNED AND/OR ANIONIOALLY TANNED GRAIN LEATHER WITH ANIONIC DYES 未知

    公开(公告)号：IN151944B

    公开(公告)日：1983-09-10

    申请号：IN1339CA1979

    申请日：1979-12-24

    Applicant: BASF AG

    Inventor： LACH DIETRICH ,  STREICHER ROLF ,  FEICHTMAYR FRANZ

    IPC: D06P1/41 ,  D06P1/60 ,  D06P3/32 ,  D06P1/82

    Abstract: A process for dyeing grain leather with anionic dyes under the conventional conditions for exhaustion methods, in the presence of two specific surfactants. The combined use of the two surfactants results, in the case of cationically tanned (essentially mineral-tanned) leather, in an improvement in the levelness and dye penetration and in the case of anionically tanned (synthetics-tanned or vegetable-tanned) or retanned leather, in an increase in depth of the color. The two surfactants are (a) an aliphatic alcohol of 9 to 24 carbon atoms oxyethylated with from 3 to 120 ethylene oxide units and (b) an aliphatic amine of 8 to 20 carbon atoms oxyethylated with from 6 to 80 ethylene oxide units, and they are used in a weight ratio of a:b of from 1:4 to 4:1 and in a total amount of from 0.3 to 3%, based on shaved weight.

    DYEING OF GRAIN LEATHER
    28.
    发明专利
    DYEING OF GRAIN LEATHER 未知

    公开(公告)号：CA1132307A

    公开(公告)日：1982-09-28

    申请号：CA342436

    申请日：1979-12-20

    Applicant: BASF AG

    Inventor： LACH DIETRICH ,  STREICHER ROLF ,  FEICHTMAYR FRANZ

    IPC: D06P1/41 ,  D06P1/60 ,  D06P3/32 ,  C09B67/00

    Abstract: A process for dyeing grain leather with anionic dyes under the conventional conditions for exhaustion methods, in the presence of two specific surfactants. The combined use of the two surfactants results, in the case of cationically tanned (essentially mineral-tanned) leather, in an improvement in the levelness and dye penetration and in the case of anionically tanned (synthetics-tanned or vegetable-tanned) or retanned leather, in an increase in depth of the color. The two surfactants are an aliphatic alcohol of 9 to 24 carbon atoms oxyethylated with from 3 to 120 ethylene oxide units and an aliphatic amine of 8 to 20 carbon atoms oxyethylated with from 6 to 80 ethylene oxide units, and they are used in a weight ratio of a:b of from 1:4 to 4:1 and in a total amount of from 0.3 to 3%, based on shaved weight.

    DYEING OF GRAINED LEATHER
    29.
    发明专利
    DYEING OF GRAINED LEATHER 未知

    公开(公告)号：AU5422779A

    公开(公告)日：1980-07-03

    申请号：AU5422779

    申请日：1979-12-28

    Applicant: BASF AG

    Inventor： LACH DIETRICH ,  STREICHER ROLF ,  FEICHTMAYR FRANZ

    IPC: D06P1/41 ,  D06P1/60 ,  D06P3/32 ,  D06P1/607 ,  D06P1/613 ,  C08L71/02

    Abstract: A process for dyeing grain leather with anionic dyes under the conventional conditions for exhaustion methods, in the presence of two specific surfactants. The combined use of the two surfactants results, in the case of cationically tanned (essentially mineral-tanned) leather, in an improvement in the levelness and dye penetration and in the case of anionically tanned (synthetics-tanned or vegetable-tanned) or retanned leather, in an increase in depth of the color. The two surfactants are (a) an aliphatic alcohol of 9 to 24 carbon atoms oxyethylated with from 3 to 120 ethylene oxide units and (b) an aliphatic amine of 8 to 20 carbon atoms oxyethylated with from 6 to 80 ethylene oxide units, and they are used in a weight ratio of a:b of from 1:4 to 4:1 and in a total amount of from 0.3 to 3%, based on shaved weight.

Patent Agency Ranking