BINDERS FOR COATINGS
    64.
    发明专利

    公开(公告)号:DE2962539D1

    公开(公告)日:1982-06-03

    申请号:DE2962539

    申请日:1979-03-30

    Applicant: BASF AG

    Abstract: Binders which comprise (A) an aqueous emulsion of a copolymer A, having a glass transition temperature of 0-50 DEG C., of monoolefinically unsaturated carboxylic acid esters, with or without styrene, vinyl acetate, vinyl chloride and acrylonitrile, which copolymer contains, as copolymerized units, small amounts of monoolefinically unsaturated monocarboxylic acids and/or dicarboxylic acids and/or their amides (of which the nitrogen atoms may or may not be alkyl-substituted and/or alkylol-substituted) and small amounts of monomers containing carbonyl groups, (B) from 0.05 to 1 mole, per mole of carbonyl groups present in the copolymer A, of a water-soluble aliphatic dihydrazine compound and (C) from 0 to 0.02 mole, per mole of dihydrazine compound, of a water-soluble zinc, manganese, cobalt and/or lead salt, or particularly suitable for use in paints and pebble dash renderings, since they give films which adhere particularly well to alkyd resin primers and which show particularly little tendency to whitening.

    Emulsion polymn of ethylenically unsatd monomers - - to give dispersions with broad particle size distribution

    公开(公告)号:DE2160381A1

    公开(公告)日:1973-06-14

    申请号:DE2160381

    申请日:1971-12-06

    Applicant: BASF AG

    Inventor: LEY GREGOR DR

    Abstract: In the polymn. of ethylenically unsatd. monomers (e.g. acrylates, styrene, vinyl esters and/or butadiene), in aq. emulsion, using conventional emulsion, using conventional emulsifiers and radical polymn. initiators, in usual conditions of pressure and temp., all or part of the monomer(s) are simultaneously pre-polymd. in a continuously streamed-through pre-reactor, and the pre-polymn. mixt. is fed opt. simultaneously with the remaining monomer(s), to the polymn. mixt. Process control is easy and there is no tendency of polymer particles to agglomerate.

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