Coating material composition
    20.
    发明授权
    Coating material composition 有权
    涂料组成

    公开(公告)号:US07276554B2

    公开(公告)日:2007-10-02

    申请号:US11034137

    申请日:2005-01-12

    摘要: Coating compositions that are stable to thermal yellowing that include coating materials containing I) one or more dispersions of hydroxyl-free polyurethanes and/or polyurethane-ureas, II) one or more aqueous solutions or dispersions of ionically modified, hydroxyl-containing polyurethanes and/or polyurethane-ureas, other than the constituents of component I), and III) at least one crosslinker. The dispersions are obtained by A) preparing an NCO-containing polyurethane prepolymer by reacting polyisocyanates with polymeric polyols and/or polyamines having number-average molecular weights of 400 to 8000 g/mol, isocyanate-reactive, ionically or potentially ionically hydrophilicizing compounds and/or isocyanate-reactive nonionically hydrophilicizing compounds; B) either dissolving the prepolymer obtained from step A) in aliphatic ketones or, diluting the prepolymer solution if the preparation has already been carried out in the presence of A6) by further addition of aliphatic ketones, and C) reacting the remaining free NCO groups of the prepolymer with a chain extender component.

    摘要翻译: 对于热黄变具有稳定性的涂料组合物,其包括含有I)一种或多种无羟基聚氨酯和/或聚氨酯 - 脲的分散体的涂料,II)一种或多种离子改性的含羟基聚氨酯的水溶液或分散体和/ 或聚氨酯 - 脲,除了组分I的组分之外)和III)至少一种交联剂。 分散体通过以下方式获得:A)通过使多异氰酸酯与数均分子量为400-8000g / mol,异氰酸酯反应性,离子或潜在离子亲水化的化合物和/或多异氰酸酯的聚合多元醇和/或多胺反应来制备含NCO的聚氨酯预聚物和/ 或异氰酸酯反应性非离子亲水化化合物; B)将通过步骤A)获得的预聚物溶解在脂族酮中,或者如果制备已经在A6的存在下进一步添加脂肪族酮,则稀释预聚物溶液),和C)使剩余的游离NCO基团 的预聚物与扩链剂组分。