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    Dispersants for gypsum composition
    4.
    发明专利
    Dispersants for gypsum composition 有权

    公开(公告)号：JP2011529432A

    公开(公告)日：2011-12-08

    申请号：JP2011520517

    申请日：2009-07-30

    申请人： シーカ・テクノロジー・アーゲー

    发明人： イェルク・ツィマーマン ,  ウエリ・スルサー ,  クリスティーナ・ハンペル ,  ジャバー・アル・シェマリ

    IPC分类号： C04B24/26 ,  C04B28/14 ,  C08F220/06 ,  C08F222/02 ,  C08K3/30 ,  C08L101/06

    CPC分类号： C04B24/2647 ,  C04B24/165 ,  C04B24/246 ,  C04B24/2658 ,  C04B28/147 ,  C04B2111/0062

    摘要： Use of a polymer comprising a main chain containing hydrocarbon group, at least a side chain comprising at least an acid group from carboxylic acid group, sulfonic acid group, phosphonic acid group, phosphoric acid group or its salt, at least a side chain with a molecular weight of at least 1800 g/mole and comprising a polyoxyalkylene group, as dispersing agent for gypsum compositions, is claimed, where the polyoxyalkylene group is bonded to the main chain over a coupler comprising at least an ester, amide or imide group. Use of a polymer comprising a main chain containing hydrocarbon group, at least a side chain comprising at least an acid group from carboxylic acid group, sulfonic acid group, phosphonic acid group, phosphoric acid group or its salt, at least a side chain with a molecular weight of at least 1800 g/mole and comprising a polyoxyalkylene group, as dispersing agent for gypsum compositions, is claimed, where the polyoxyalkylene group is bonded to the main chain over a coupler comprising at least an ester, amide or imide group, and the polymer has acid content of 1.5-4, preferably 1.7-3.5 mmole per 1 g of the polymer. Independent claims are included for: (1) a binder comprising a mixture of at least 30 wt.% of gypsum and at least a polymer; and (2) the preparation of the binder containing the mixture comprising separating the polymer or adding a binder, as additive, in solid or liquid form.