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    Polyurethane dispersions having improved film-forming properties
    5.
    发明申请
    Polyurethane dispersions having improved film-forming properties 审中-公开
    具有改善成膜性能的聚氨酯分散体

    公开(公告)号：US20060241228A1

    公开(公告)日：2006-10-26

    申请号：US11407818

    申请日：2006-04-20

    申请人： Rolf Gertzmann ,  Christoph Irle ,  Rolf Roschu

    发明人： Rolf Gertzmann ,  Christoph Irle ,  Rolf Roschu

    IPC分类号： C08K5/06

    CPC分类号： C08G18/12 ,  C08G18/0823 ,  C08G18/0852 ,  C08G18/6625 ,  C08G18/6659 ,  C08J3/07 ,  C08J2375/04 ,  C09D175/04 ,  C08G18/3228

    摘要： The present invention relates to a process for preparing an aqueous coating composition by I) preparing a polyurethane dispersion that is free from NMP and other solvents by 1) preparing in a first step an NCO prepolymer solution which has a concentration of 66% to 98% by weight in a solvent having a boiling point of below 100° C. at atmospheric pressure and which is the reaction product of: a) one or more polyisocyanates with b) one or more polyols having average molecular weights Mn of 500 to 6000, c) one or more polyols having average molecular weights Mn of 62 to 500, and d) one or more compounds which contain an ionic group or a potential ionic group, 2) in a second step dispersing NCO prepolymer I.1) in water and at least partly neutralizing the potential ionic groups to form ionic groups before, during or after the dispersion, 3) in a third step chain extending NCO prepolymer I.1) with e) one or more polyamines having average molecular weights Mn of below 500, and 4) in a fourth step removing the solvent completely by distillation, and ubsequently II) adding 1% to 7% by weight of an ethylene or propylene glycol ether and optionally other coating additives together or separately to polyurethane dispersion I). The present invention also relates to the aqueous coating composition obtained by the process of the invention.

    摘要翻译： 本发明涉及一种制备水性涂料组合物的方法，该方法为：1）通过以下步骤制备不含NMP和其它溶剂的聚氨酯分散体：1）在第一步中制备浓度为66％至98％的NCO预聚物溶液， 在大气压下在沸点低于100℃的溶剂中，并且其是以下物质的反应产物：a）一种或多种多异氰酸酯与b）一种或多种具有平均分子量M n的多元醇， SUB>为500至6000，c）一种或多种平均分子量为M n≥62的多元醇，以及d）一种或多种含有离子基团或潜在离子基团的化合物，2 ）在第二步中将NCO预聚物I.1）分散在水中，并且在分散之前，期间或之后至少部分中和潜在的离子基团以形成离子基团，3）在延伸NCO预聚物I.1）的第三步链中与 e）一种或多种具有平均分子量M n n SU的多胺 B>低于500，和4）在第四步骤中通过蒸馏完全除去溶剂，随后II）将1重量％至7重量％的乙烯或丙二醇醚和任选的其它涂料添加剂一起或分别加入到聚氨酯分散体 一世）。 本发明还涉及通过本发明的方法获得的水性涂料组合物。