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    24.
    发明专利
    未知

    公开(公告)号：FI88465B

    公开(公告)日：1993-02-15

    申请号：FI863681

    申请日：1986-09-11

    Applicant: BASF AG

    Inventor： SLIWKA WOLFGANG

    IPC: B01J13/02 ,  B01J13/18 ,  B41M5/165

    Abstract: 1. A continuous process for preparing microcapsules having melamine-formaldehyde condensate capsule walls in aqueous dispersion starting from appropriate water-soluble melamine-formaldehyde precondensates in the presence of water-soluble high polymers containing strongly acid groups, which comprises either 1) continuously mixing the water-soluble precondensate, the hydrophobic material to be encapsulated and the aqueous solution of the high polymer containing strongly acid groups, 2) further condensing the water-soluble precondensate in this mixture at pH 3.0-6.5 until the solution starts to become cloudy, 3) continuously dispersing the hydrophobic material in the aqueous dispersion formed, the fine droplets of the hydrophobic material being enveloped by the water-insoluble condensate resulting from the precondensate, or 1a) continuously mixing the water-soluble precondensate and the aqueous solution of the high polymer containing strongly acid groups, 2a) further condensing the water-soluble precondensate in the mixture at pH 3.0-6.5 until the solution starts to become cloudy, then 3a) continuously dispersing the hydrophobic material in the aqueous dispersion formed, the fine droplets of the hydrophobic material being enveloped by the water-insoluble condensate resulting from the precondensate, and then 4) condensing the wall material of the resulting microcapsules to completion.

    25.
    发明专利
    未知

    公开(公告)号：DE3772283D1

    公开(公告)日：1991-09-26

    申请号：DE3772283

    申请日：1987-06-30

    Applicant: BASF AG

    Inventor： NAARMANN HERBERT ,  SLIWKA WOLFGANG

    IPC: B32B3/20 ,  B32B5/16 ,  B32B27/18 ,  B32B29/04 ,  C08F4/28 ,  H01B1/12 ,  H01B1/20 ,  H05K3/10

    Abstract: A composite laminate consists of (a) a layer of non-conducting material, and (b) a layer of a mixt. of micro-capsules, in which part of the micro-capsules contains cpds. of the pyrrole class, and another part contains an oxidising agent. The laminate is pref. formed from 2 non-conducting layers, opt. of different materials. Synthetics, e.g. PVC, polystyrene or polyethylene, or paper or cellulose derivs., are suitable. Pref. at least part of the microcapsules contain a conducting salt.

    Production of vinyl ester polymer dispersions
    29.
    发明专利
    Production of vinyl ester polymer dispersions 未知

    公开(公告)号：GB1129974A

    公开(公告)日：1968-10-09

    申请号：GB494866

    申请日：1966-02-04

    Applicant: BASF AG

    Inventor： SLIWKA WOLFGANG ,  GELLRICH MANFRED

    IPC: C08F2/08 ,  C08F2/18 ,  C08F2/20 ,  C08F2/22 ,  C08F261/04

    Abstract: 1,129,974. Coating. BADISCHE ANILIN - & SODA-FABRIK A.G. 4 Feb., 1966 [5 Feb., 1965], No. 4948/66. Heading B2E [Also in Division C3] Substrates may be coated with aqueous dispersions of vinyl ester polymers prepared by polymerising vinyl esters in the presence of catalysts and modified polyvinyl alcohols which are saponification products of copolymers of 90 to 99.9 weight per cent of a vinyl ester of a C 1-3 aliphatic saturated monocarboxylic acid and 0.1 to 10 weight per cent of a vinyl ester of a C 4-20 aliphatic saturated monocarboxylic acid in which the carboxylic group is α to a tertiary or quarternary carbon atom. In an example cardboard is coated with a dispersion of polyvinyl propionate prepared in the presence of a saponified vinyl acetate/vinyl 2,2,4,4- tetramethyl valerate copolymer, said dispersion being mixed with a paste of lithopone in aqueous ammonium polyacrylate solution.

    30.
    发明专利
    未知

    公开(公告)号：FR1502155A

    公开(公告)日：1967-11-18

    申请号：FR81961

    申请日：1966-10-28

    Applicant: BASF AG

    Inventor： POHLEMANN HEINZ ,  FLORUS GERHARD ,  SLIWKA WOLFGANG ,  GELLRICH MANFRED

    IPC: C08F2/18 ,  C08F2/20 ,  C08F2/22 ,  C08F212/08 ,  C08F220/12

    Abstract: 1,155,275. Styrene/acrylate and/or methacrylate copolymers. BADISCHE ANILIN- & SODA FABRIK A.G. 28 Oct., 1966 [29 Oct., 1965], No. 48419/66. Heading C3P. Polymer dispersions are produced by copolymerizing styrene with 5-95% of esters of acrylic and/or methacrylic acid with C 1-8 alcohols in an aqueous medium in the presence of catalysts and emulsifiers, 0À01-2% of a protective colloid being gradually added after 20-80/) of the monomers have been copolymerized, and then completing the copolymerization. The esters may be ethyl, n- or tert-butyl, 2-ethylhexyl or cyclohexyl acrylate and/or methyl or butyl methacrylate. The copolymer may also include acrylic acid, acrylamide, methacrylamide, methyl vinyl carbinol, or vinyl sulphonic acid. Polyvinyl methyl ether may be present during the polymerization. The protective colloid may be a polyvinyl alcohol, which may be acetalized with n-butyraldehyde and completely hydrolysed, a hydroxyethyl cellulose, an ammoniacal solution of polyacrylic acid or a copolymer of acrylic acid/acrylamide/ acrylonitrile/methyl acrylate. The emulsifier may be the sodium salt of the sulphonated nonyl-phenol/ethylene oxide, ethylene oxide/noctylphenol, sodium vinyl sulphonate or propylene oxide/ethylene oxide. The catalyst may be potassium persulphate.

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