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    • 4. 发明公开
    • POLYURETHANEUREAS FOR WOOD COATINGS
    • POLYURETHANHARNSTOFFEFÜRHOLZBESCHICHTUNGEN
    • EP3020743A1
    • 2016-05-18
    • EP15194093.9
    • 2015-11-11
    • Covestro Deutschland AG
    • NAZARAN, PanteaGERTZMANN, RolfGARCIA MARTINEZ, Juan MiguelALMATO GUITERAS, MariaTEJADA, Eva
    • C08G18/66C08G18/75C08G18/08C08G18/12C09D175/02C08G18/32C08G18/42
    • C08G18/755C08G18/0814C08G18/12C08G18/3206C08G18/3234C08G18/3275C08G18/4202C08G18/4211C08G18/4238C08G18/664C08G18/6655C08G2150/00C09D175/02C09D175/06
    • The invention relates to a cationically hydrophilized polyurethaneurea characterized in that it is synthesized from
      a) at least one aliphatic, araliphatic and/or cycloaliphatic polyisocyanate,
      b) polyols having a number-average molecular weight Mn ≥ 400 and ≤ 6000 g/mol and a hydroxyl functionality of ≥ 1.5 and ≤ 4, comprising at least one polyester polyol b1), which has an amorphous structure and which comprises as synthesis component at least one aromatic dicarboxylic acid and/or the corresponding carboxylic anhydride, the fraction of aromatic dicarboxylic acids and/or their anhydrides in the polyester polyol being ≥ 35 wt%, based on the overall mass of the polyester polyol,
      c) at least one cationically hydrophilizing component which has at least one group that is reactive towards isocyanate groups, and has at least one cationic or potentially cationic group,
      d) at least one aliphatic, amino-functional compound which has at least two isocyanate-reactive amino groups,
      e) optionally at least one alcohol which has at least two hydroxyl groups and a molar mass ≥ 60 and ≤ 399 g/mol and
      f) optionally at least one compound which has a group that is reactive towards isocyanate groups.
      The invention further relates to an aqueous dispersion comprising the polyurethaneurea and to a coating composition comprising the polyurethaneurea or the corresponding aqueous dispersion. Further subjects of the invention are a method for coating substrates using the coating composition of the invention, and the coated substrate obtainable in such a method.
    • 本发明涉及一种阳离子亲水化聚氨酯脲,其特征在于其由a)至少一种脂族,芳脂族和/或脂环族多异氰酸酯合成,b)数均分子量Mn‰‰‰‰¤¤¤¤¤¤¤¤ 和含有至少一种具有无定形结构的聚酯多元醇b1)的‰¥1.5和‰‰的羟基官能团,其中包含至少一种芳族二羧酸和/或相应的羧酸酐作为合成成分, 基于聚酯多元醇的总质量,聚酯多元醇中的芳族二羧酸和/或它们的酸酐为35重量%,c)至少一个具有至少一个对异氰酸酯基反应的基团的阳离子亲水组分, 并且具有至少一个阳离子或潜在阳离子基团,d)至少一种具有至少两个异氰酸酯反应性氨基官能团的脂族氨基官能化合物 ps,e)任选地至少一种具有至少两个羟基和摩尔质量‰60和‰399g / mol的醇,以及f)任选地至少一种具有对异氰酸酯基团具有反应性的基团的化合物。 本发明还涉及包含聚氨酯脲和包含聚氨酯脲或相应的水性分散体的涂料组合物的水性分散体。 本发明的其它主题是使用本发明的涂料组合物涂布基材的方法和可以以这种方法获得的涂布基材。