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    A process of printing textile materials with vat and sulphur dyestuffs
    17.
    发明专利
    A process of printing textile materials with vat and sulphur dyestuffs 未知

    公开(公告)号：GB829177A

    公开(公告)日：1960-02-24

    申请号：GB2744658

    申请日：1958-08-27

    Applicant: BASF AG

    Inventor： CONRAD JOHANNES ,  BLUM ADOLF ,  KUEPPERS WILHELM

    Abstract: In the printing of textile materials with vat or sulphur dyestuffs by a two-stage process wherein the textile is printed with the dyestuff in the first stage and then, in the second stage, is treated with a solution of a reducing agent and finally heat-treated, the reducing agent employed is an alkali-metal or ammonium salt of a straight- or branched-chain-hydroxyalkyl p sulphinic acid with 2 to 4 carbon atoms. Specified reducing agents are the alkali-metal and ammonium salts of hydroxyethane-, hydroxy-n-propane-, hydroxy-iso-propane- and hydroxy-n-butane-sulphinic acids. The printing paste may contain coagulable thickening agents, such as cellulose ethers, polyvinyl alcohol, carob bean flour, carob bean flour ether, ethers of gum Guar or alginates, and alkaline agents, such as sodium or potassium hydroxides or carbonates, may be added to the printing paste or to the reducing agent solution which is padded or printed on the textile. Alternatively, the printing paste may contain non-coagulable thickening agents, such as tragacanth mucilage, alkaline agents being then added to either the printing paste or the reducing agent solution, in which case the reducing agent solution may be sprayed on to the textile. The heat treatment may be effected at 80-200 DEG C. for 10 to 60 seconds by treatment with steam, or in molten metal, hot oil or hot aqueous salt baths, or by contact with a heated metal surface, air being excluded in all cases. The process is applicable to textiles of native or regenerated cellulose, natural silk or polyamide fibres. Numerous examples are given, in one of which the reducing agent padding solution also contains a vat dyestuff.

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