12.
    发明专利
    未知

    公开(公告)号:DK240783A

    公开(公告)日:1983-11-30

    申请号:DK240783

    申请日:1983-05-27

    Applicant: HOECHST AG

    Abstract: An aqueous plastics dispersion is manufactured by copolymerization of several olefinically unsaturated monomers, one of them at least being free from amide and sulfo groups, one of them at least having an amide group and one of them at least having a sulfo group. Copolymerization is carried out in an aqueous medium under usual conditions. The resulting copolymer has a second order transition temperature of 20 DEG C. at most. The plastics dispersion is compatible with cement and serves as additive in cement-containing building materials.

    14.
    发明专利
    未知

    公开(公告)号:DK433581A

    公开(公告)日:1982-04-02

    申请号:DK433581

    申请日:1981-09-30

    Applicant: HOECHST AG

    Inventor: LOEHR G REINECKE R

    Abstract: A protective colloid-free plastics dispersion yielding after drying a polymer film which under the influence of moisture has no or little tendency to whitening contains polymer particles having a bimodal size distribution, that is, on the one hand relatively coarse particles and on the other hand relatively fine particles. The polymer component consists of at least 10 weight % of particles having an average diameter of less than 0.2 mu m and of 90 weight % at most of particles having an average diameter of more than 0.25 mu m, and the ratio of average grain size of coarse to fine polymer is at least 2:1. The plastics dispersion is suitable especially as binder dispersion in plasters and gloss paints.

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