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    Packaging materials
    11.
    发明专利
    Packaging materials 未知

    公开(公告)号：GB959133A

    公开(公告)日：1964-05-27

    申请号：GB3070562

    申请日：1962-08-10

    Applicant: BASF AG

    Inventor： LANGE GUENTER ,  LOUIS GERD ,  OTTO HANS-WERNER ,  REINBOLD IMMO ,  WILHELM HANS

    IPC: B65D65/38 ,  B65D65/42

    Abstract: Coloured packaging material in the form of sheets or containers made from organic plastics consists of or comprises an organic addition polymer containing a dye linked therewith by a covalent chemical bond. The dye containing addition polymer may be a copolymer of a colourless monomer and a dye containing a polymerizable group, preferably a vinyl group, or may be the reaction product of a polymer containing reactive groups and a dye having a group reactive therewith, and may be prepared by the processes described in Specifications 622,935, 877,402 and 946,472. Innocuous plasticizers, fillers and pigments may be incorporated and sheets prepared by casting from solution, aqueous dispersion or a melt. Bags, bottles, beakers, boxes and tubes may be prepared by injection moulding, and the polymers may be laminated to or used for impregnating paper or cardboard. The sheets and containers may be used for packaging solid and liquid foodstuffs, pharmaceuticals, tinctures, cosmetic preparations and chemical reagents and solvents. In examples (1) sheets are calendered from a copolymer prepared by suspension copolymerization of vinyl chloride and N-acryloylaminoazobenzene in the presence of partially saponified polyvinyl acetate, azodiisobutyronitrile and sodium pyrophosphate; and (2) boxes are obtained by deep drawing sheets extruded from a mixture of a suspension copolymer of styrene and acrylonitrile and a copolymer obtained by initiating the copolymerization of vinyl methyl ether and the product obtained by coupling N-acryloylamino-p-aminobenzene and 1-(2-chloro-5-sulphophenyl) -3- methyl-pyrazolone -5, in aqueous dispersion in the presence of sodium paraffin sulphonates, potassium persulphate, sodium bicarbonate and sodium pyrophosphate, and adding butyl acrylate, acrylonitrile and butane diol diacrylate when polymerization has commenced.

    Copolymers for use as binders in paper coating compositions
    15.
    发明专利
    Copolymers for use as binders in paper coating compositions 未知

    公开(公告)号：GB1092673A

    公开(公告)日：1967-11-29

    申请号：GB879665

    申请日：1965-03-02

    Applicant: BASF AG

    Inventor： WESSLAU HERMANN ,  POHLEMANN HEINZ ,  SPOOR HERBERT ,  ADDICKS GUENTHER ,  REINBOLD IMMO

    IPC: D21H19/58

    Abstract: Binders for paper-coating compositions comprise a mixture in aqueous dispersion of: (a) 95 to 60% by weight of a copolymer A having a glass temperature of from - 60 DEG to + 20 DEG C. and derived from 40-70% by weight styrene, 30-60% of an acrylate and/or methacrylate ester of a C2-C12 aliphatic alcohol and 0-10% of at least one other ethylenically unsaturated compound, and (b) 5 to 40% by weight of a copolymer B derived from 15-55% by weight of acrylic and/or methacrylic acid, 2-6% of acrylamide and/or methacrylamide and 85-45% of at least one other ethylenically unsaturated compound which forms a water-insoluble homopolymer, of which at least 20% by weight (with reference to these other compounds) is one or more acrylate and/or methacrylate esters of a C1-C4 aliphatic alcohol. The optional monomer components of copolymer A include acrylonitrile, vinyl chloride, vinylidene chloride, acrylic acid, methacrylic acid, crotonic acid, maleic acid, fumaric acid, itaconic acid and amides, substituted amides and hemi esters of such acids, vinyl sulphonic acid and p-styrene sulphonic acid. Monomer components (forming water-insoluble homopolymers) which may be incorporated in copolymer B, in addition to the essential (meth)-acrylate esters, include corresponding esters of alcohols with more than 4 carbon atoms, styrene, vinyl chloride, vinylidene chloride, vinyl esters, acrylonitrile and methacrylonitrile. For use as paper-coating compositions, the binders are mixed with fillers or pigments, e.g. clay or titanium dioxide, and other optional components, e.g. sodium polyacrylate, and adjuste to neutral or alkaline pH by treatment with an alkali. In an example, (A) styrene, n-butyl acrylate, acrylic acid and sodium vinyl sulphonate are polymerized in aqueous emulsion using potassium persulphate catalyst, and (B) ethyl acrylate, acrylic acid and acrylamide are polymerized in aqueous emulsion using potassium persulphate catalyst and in the presence of dodecyl mercaptan.ALSO:Neutral or alkaline paper coating compositions comprise a pigment or filler, e.g. clay or titanium dioxide, suspended in a binder comprising an aqueous dispersion of (a) 95 to 60% by weight of a copolymer derived from styrene, an acrylate and/or methacrylate ester of a C2-C12 aliphatic alcohol and optionally at least one other ethylenically unsaturated compound, e.g. acrylic acid, sodium vinyl sulphonate and/or acrylonitrile, and 5 to 40% by weight of a copolymer derived from acrylic and/or methacrylic acid, acrylamide and/or methacrylamide and at least one other ethylenically unsaturated compound which forms a water-insoluble homopolymer, of which at least 20% by weight of these other compounds is one or more acrylate and/or methacrylate esters of C1-C4 aliphatic alcohol (acrylonitrile may also be included, for example, in said other compounds). The coating compositions may include other components, e.g. sodium polyacrylate. Paper can be coated with the compositions by known methods such as roller coating or with a blade coater.

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