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    The use of stable mixtures of polyacrylamide and aqueous dispersions of water-repellent agents for finishing textiles
    2.
    发明专利
    The use of stable mixtures of polyacrylamide and aqueous dispersions of water-repellent agents for finishing textiles 未知

    公开(公告)号：GB1107556A

    公开(公告)日：1968-03-27

    申请号：GB2805365

    申请日：1965-07-02

    Applicant: BASF AG

    Inventor： MARX MATTHIAS ,  WILHELM HANS ,  WOLF HANS ,  TULO HERBERT

    IPC: C08F20/56 ,  D06M14/00 ,  D06M15/285

    Abstract: Stable compositions suitable for finishing textiles comprise a mixture of polyacrylamide and an aqueous dispersion of a water-repelling agent based on a zirconium salt, an aluminium salt and/or a solid paraffin, the polyacrylamide having been prepared by polymerizing acrylamide, optionally together with not more than 1% by weight (based on the polymer) of a comonomer such as a carboxylic monomer, in the presence of a free radical catalyst and a mercaptan having an O-containing group adjacent to the -SH group. Salts specified are zirconium acetate and aluminium oxychloride. The compositions may also contain additives such as white oil, bone glue, buffers, acetic acid, and condensation products of formaldehyde with ureas, melamine, dicyanodiamide and etherified derivatives thereof. The polyacrylamide is preferably prepared in aqueous solution at a pH of from 3.5 to 6 using a catalyst such as hydrogen peroxide, acetyl peroxide or azodiisobutyronitrile, or less preferably a persulphate or perborate, and an oxygen-containing mercaptan such as 2-mercapto-ethanol, 1 - thio - glycerine or thioglycollic acid. The reaction mixture may also include a small amount of K2FeCl4. Textiles treated with the compositions are finished by heating the impregnation, optionally in the presence of a curing catalyst such as ammonium chloride.ALSO:Textiles are finished by impregnating with a composition comprising polyacrylamide and an aqueous dispersion of a water-repelling agent based on a zirconium salt (e.g. the acetate), an aluminium salt (e.g. the oxychloride and/or a solid paraffin, the polyacrylamide having been prepared by polymerising the monomer in the presence of a free radical catalyst and a mercaptan having an O-containing group adjacent to the -SH group. The compositions may optionally include additives such as white oil, bone glue, buffers, acetic acid, ammonium chloride (curing catalyst) and aminoplast condensation products. The impregnated textiles are dried and heated to obtain water-repellent and, optionally, crease-proof, swelling-proof and shrink-resistant finishes. The compositions can be applied to woollen, cotton and synthetic-fibre fabrics.

    6.
    发明专利
    未知

    公开(公告)号：DE1128397B

    公开(公告)日：1962-04-26

    申请号：DEB0055580

    申请日：1959-11-18

    Applicant: BASF AG

    Inventor： GOETZ DR NORBERT ,  RUEMENS DR WILHELM ,  ZEIDLER DR ROLF ,  TULO HERBERT

    IPC: D06M15/29 ,  D06M15/39 ,  D06M15/423 ,  D06Q1/08

    Abstract: Textile fabrics which contain at least 25% by weight of cellulosic fibres, e.g. cotton and viscose rayon, are treated with an aqueous liquor which contains (a) a reaction product of an aminoplast-forming substance with formaldehyde which contains in the molecule at least two nitrogen atoms and, connected to nitrogen, at least two methylol groups or etherified methylol group and (b) a copolymer from 1-25% by weight of a compound of the general formula in which R1 stands for -H or -CH3, and 99-75% by weight of an ester formed from an acid in which R2 stands for -H or -CH3 and a monohydric saturated aliphatic alcohol with 1-5 carbon atoms, and are then subjected, conveniently after drying, to a mechanical treatment, e.g. embossing, pleating or schreinering, at a temperature of 140 DEG -210 DEG C. and heated to above 100 DEG C. up to 200 DEG C. The fabrics may be dried before the mechanical treatment at 70 DEG -150 DEG C. until they have a residual moisture content of 6-14% by weight. In addition to the acrylic and methacrylic acid esters, other copolymerisable compounds, e.g. vinyl chloride, vinyl esters and ethers made from acids and alcohols having 1-5 carbon atoms, butadiene, vinyl lactams, such as pyrrolidone or caprolactam, styrene and substituted styrene, may be used for the preparation of the copolymer. Specified aminoplast precondensates are tetramethylol glyoxal diureine, dimethylol urea dimethyl ether, dimethylol ethylene urea, dimethylol N-alkyl triazinones, dimethylol urea, dimethylol glyoxal mono ureine, dimethylol butane-diol diurethane and di-, tri- and hexamethylol melamines. The composition may also contain a dispersing agent, e.g. a reaction product of iso-octylphenol or a fatty acid monoethanol amide with ethylene oxide, and as hardening catalyst ammonium nitrate, chloride or sulphate, mono- or di-ammonium phosphate, zinc nitrate or magnesium chloride. The mechanical treatment may be carried out immediately following drying or impregnation or the impregnated fabric may be allowed to lie for hours or days and then subjected to the mechanical treatment.

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