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    A process of printing textile materials with vat and sulphur dyestuffs
    1.
    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.

    Improvements in printing textile materials with vat and sulphur dyestuffs
    3.
    发明专利
    Improvements in printing textile materials with vat and sulphur dyestuffs 未知

    公开(公告)号：GB837940A

    公开(公告)日：1960-06-15

    申请号：GB2744758

    申请日：1958-08-27

    Applicant: BASF AG

    Inventor： CONRAD JOHANNES ,  JANSON ALFONS ,  WELLER HEINZ ,  BLUM ADOLF ,  KUEPPERS WILHELM

    Abstract: In a two-stage printing process for textile materials wherein the material is printed with a vat or sulphur dyestuff in the first stage and in the second stage is treated with a solution of a reducing agent and then given a short heattreatment, the reducing agent employed is a compound of the formula wherein A represents a hydrogen atom or a lower alkyl radical, x = 0, 1 or 2, y = 1, 2 or 3, x + y = 3 and D represents the radical of a salt of an alkylsulphinic acid with 2 to 4 carbon atoms of the formula wherein E represents an alkyl radical, G represents a hydrogen atom or an alkyl radical and Z is an alkali metal or ammonium cation. The lower alkyl radical A may bear a substituent radical of the formula wherein D has the above significance, p and q are 0, 1 or 2 and p + q = 2. The printing paste may contain coagulable thickening-agents such as alkyl cellulose ethers, carob bean flour ether, polyvinyl alcohol, ethers of gum Guar, alginates or carob bean flour, and the printing paste or reducing agent solution may contain alkaline agents such as sodium or potassium hydroxide or carbonate. The reducing agent solution may be sprayed on to the printed textile, in which case the printing paste may contain noncoagulable thickening agents such as tragacanth mucilage. The heat treatment is preferably effected at 80-200 DEG C. for 10-60 seconds by air-free steam, contact with heated metal, or immersion in hot oil or molten metal baths or in hot aqueous salt solutions. The reducing agent solution may also contain vat dyestuffs. The process is applicable to textiles of native or regenerated cellulose, natural silk or polyamide fibres. Numerous examples are given in which the reducing agents enployed are in which Z+=a sodium or potassium cation and E = methyl-, ethyl- or n-propyl. in which Z+=a potassium cation. in which Z+=a sodium or potassium ion and E = methyl. in which Z+=a sodium, potassium or ammonium cation. in which Z+=a potassium cation.

    Improvements in the stabilisation of acid stripping baths
    5.
    发明专利
    Improvements in the stabilisation of acid stripping baths 未知

    公开(公告)号：GB888390A

    公开(公告)日：1962-01-31

    申请号：GB3923258

    申请日：1958-12-05

    Applicant: BASF AG

    Inventor： JANSON ALFONS ,  CONRAD JOHANNES ,  MORWEISER KARL

    IPC: D06P5/13

    Abstract: Acid stripping baths (used to decolour dyed textile materials) which contain as reducing agents hydroxy alkane sulphinic acids, especially those containing 1-4 carbon atoms, or their salts, or their reaction products with ammonia or ethylene diamine and salts of these products, are stabilized by incorporating in the stripping bath, or in a concentrated solution or solid reducing agent for use in preparing the bath, up to 10% by weight, with reference to the reducing agent, of a saturated aliphatic mono- or dialdehyde with up to 8 carbon atoms in the molecule or a compound which splits off such an aldehyde under the conditions of the stripping process, e.g. paraformaldehyde, formaldehyde-urea condensation products containing 1-3 methylol groups and formaldehyde-ammonia condensation products such as hexamethylene tetramine, or mixtures thereof. Specified salts of hydroxy alkane sulphinic acids are those of sodium, potassium, calcium and zinc. Specification 646,809 is referred to.ALSO:Acid stripping baths (used to decolour dyed textile materials) which contain as reducing agents hydroxy alkane sulphinic acids, especially those containing 1-4 carbon atoms, or their salts or their reaction products with ammonia or ethylene diamine, and salts of these products, are stabilized by incorporating in the stripping bath, or in a concentrated solution or solid reducing agent for use in preparing the bath, up to 10% by weight, with reference to the reducing agent, of a saturated aliphatic mono- or di-aldehyde with up to 8 carbon atoms in the molecule or a compound which splits off such an aldehyde under the conditions of the stripping process, e.g. paraformaldehyde, formaldehyde-urea condensation products containing 1-3 methylol groups and formaldehyde-ammonia condensation products such as hexamethylene tetramine, or mixtures thereof. The stripping baths may also contain dispersing agents for the stripped dyestuff, e.g. condensation products of high molecular weight aliphatic alcohols, amines or carboxylic acid amides with ethylene oxide or aliphatic-aromatic sulphonic acid salts such as sodium dibutyl naphthalene sulphonate. Stripping may be carried out at a temperature of 45 DEG C.-100 DEG C. for 20 minutes to 2 hours using a bath containing 0.01%-3% by weight of the reducing agent adjusted to a pH of 3-6 with formic, lactic, acetic, phosphoric, hydrochloric or sulphuric acid. Specified salts of hydroxy alkane sulphuric acids are those of sodium, potassium, calcium and zinc. Vat dyestuffs, e.g. anthraquinone and indigo dyestuffs, azo dyestuffs and metal complex azo dyestuffs may be stripped from wool, silk, polyamide, polyurethane, polyacrylonitrile, polyester or casein derivative fibres or fabrics. Specification 646,809 is referred to.

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