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    Stable cation-active plastic dispersions and a process for their production
    2.
    发明专利
    Stable cation-active plastic dispersions and a process for their production 未知

    公开(公告)号：GB897804A

    公开(公告)日：1962-05-30

    申请号：GB4111960

    申请日：1960-11-30

    Applicant: BASF AG

    Inventor： FIKENTSCHER HANS ,  HERRLE KARL ,  WINTER GERNOT ,  MUELLER ALFRED ,  REICH JOHANN GEORGE ,  VOSS HEINZ

    IPC: C08F2/22 ,  C08F2/28 ,  C08F4/12 ,  C08F26/06 ,  C08F28/00 ,  D21H17/45

    Abstract: A stable cation-active plastic dispersion is prepared by copolymerizing, an ethylenically unsaturated compound difficultly soluble in water, in an aqueous dispersion containing cation-active dispersing agents with 1 to 50% of the total amount of monomers, of a N- or C- vinyl substituted aromatic compound which contains at least one quaternary nitrogen atom in the nucleus or in a side chain. A non-ionic dispersing agent may also be present. Specified ethylenically unsaturated compounds are acrylic and methacrylic esters from methyl to stearyl; vinyl esters from acetate to stearate, acrylonitrile and methacrylonitrile, vinyl chloride, vinyl fluoride, vinylidene chloride, styrene, orthochlorostyrene, alpha-methyl styrene, vinyl toluenes, mixtures of these monomers with each other or with butadiene, chloroprene, isoprene, vinyl isobutyl ether or the methyl to butyl diesters of maleic or fumaric acids; up to 10% of a water-soluble non-ionic vinyl compound, e.g. acrylamide and methacrylamide or vinyl pyrrolidene may also be present. Specified comonomers include 1-methyl-2-vinyl pyridinium bromide and methosulphate, 2-vinyl pyridium ethyl sulphate, 1-benzyl-4-vinyl-quinolinium chloride, N-vinyl-n1-methyl imidazolium bromide and methosulphate, and N,N,N-trimethyl-N-(4-vinylbenzyl) ammonium chloride. Specified cation-active dispersing agents include the water-soluble salts of fatty amines and hydroxyethylated fatty amines with lower aliphatic carboxylic acids or inorganic acids while specified non-ionic dispersing agents include hydroxyethylation products of fatty alcohols and phenols. Cation-active protective colloids such as polyvinylpyridinium salts or polyvinylimadazolium salts may also be used. The copolymerization process may take place in aqueous dispersion using persulphates, percarbonates or, preferably, hydrogen peroxide. Small amounts of water-soluble salts of iron, cobalt, copper and nickel may be present.

    Use of dispersions of cationic copolymers for paper sizing
    5.
    发明专利
    Use of dispersions of cationic copolymers for paper sizing 未知

    公开(公告)号：GB976548A

    公开(公告)日：1964-11-25

    申请号：GB4415362

    申请日：1962-11-22

    Applicant: BASF AG

    Inventor： SCHICKH OTTO VON ,  WINTER GERNOT ,  HERRLE KARL ,  REICH JOHANN GEORG

    IPC: C09J139/04 ,  D21H11/06 ,  D21H17/45 ,  D21H21/16

    Abstract: A dispersion for the stock sizing or surface sizing of paper comprises a polymer of (a) 4 to 40% of a quaternary vinylimidazolinium salt of formula where R2 is an alkyl, aralkyl or hydroxyalkyl group, R1 is aryl or R2 and Y is a radical of a strong acid which salt may be substituted in the 4- and 5-positions with low molecular weight alkyl groups and (b) at least 20% of an ester of formula where R3 is hydrogen or a C1-4 alkyl and R4 is a C2- 8 alkyl, (c) acrylonitrile and/or (d) one or more other ethylenically unsaturated polymerizable compounds. Preferred proportions are 7-20% of the salt, 40-80% of the ester and 20-50% of the acrylonitrile. Details of the preparation are given in Specification 976,547. Specification 897,804 also is referred to.ALSO:Paper is stock sized or surface sized with a dispersion of a copolymer of (a)4-40% of a quaternary vinylimidazolinium salt of formula:- where R2 is an alkyl, aralkyl or hydroxyalkyl group, R1 is R2 or aryl and Y is a radical of a strong acid, which salt may be substituted in the 4-or 5-position with low molecular weight alkyl groups and (b) at least 20% of an ester of formula:- where R3 is hydrogen or a C1-4 alkyl and R4 is a C2-3 alkyl (c) acrylonitrile and/or (d) one or more other ethylenically unsaturated polymerizable compounds. Preferred proportions are 7-20% of the salt 40-80% of the ester and 20-50% of the acrylonitrile. Specified paper are kraft, writing, printing and tissue papers and papers containing plastics fibres. The solids content of the dispersion may be from 2 to 20% for stock sizing and 0 5 to 5% for surface sizing. The dispersions may be added to the aqueous paper pulp, or at any point in the paper machine. It is particularly simple to apply the dispersion by means of a sizing press incorporated in the dry end of the paper machine. Also, finished paper if undersized, may be resized in a simple aftertreatment e.g. in a coating machine. In examples the dispersions are used to treat strips of unsized paper from 100% bleached sulphite pulp by dipping the paper in the dispersion and the dispersion is added to an aqueous suspension of bleached sulphite pulp and the mixture made into paper. Specifications 897,804 and 976,547 are referred to.

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