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    Solid polyurethane powder coating compositions containing uretdione groups that are hardenable at low temperatures
    5.
    发明授权
    Solid polyurethane powder coating compositions containing uretdione groups that are hardenable at low temperatures 有权
    含有在低温下可硬化的脲二酮基团的固体聚氨酯粉末涂料组合物

    公开(公告)号：US07572876B2

    公开(公告)日：2009-08-11

    申请号：US10836407

    申请日：2004-05-03

    申请人： Emmanouil Spyrou ,  Holger Loesch ,  Andreas Wenning

    发明人： Emmanouil Spyrou ,  Holger Loesch ,  Andreas Wenning

    IPC分类号： C08G18/16 ,  C08G18/18 ,  C08G18/80 ,  C08G18/28 ,  C08G18/10 ,  C07D229/00

    CPC分类号： C08G18/42 ,  C08G18/1875 ,  C08G18/798 ,  C08G2150/20 ,  Y10T428/31551

    摘要： A highly reactive polyurethane powder coating composition, which contains uretdione groups that are hardenable at low temperatures, contains A) at least one uretdione-containing powder coating hardener based on aliphatic, (cyclo)aliphatic or cycloaliphatic polyisocyanates and hydroxyl-containing compounds, the hardener having a melting point of from 40 to 130° C., a free NCO content of less than 5% by weight, and a uretdione content of 6-18% by weight; B) at least one hydroxyl-containing polymer having a melting point of from 40 to 130° C., and an OH number of between 20 and 200 mg KOH/g; C) 0.001-3% by weight of at least one tetraalkyl ammonium carboxylate catalyst, based on a total amount of components A) and B). Components A) and B) are present in a ratio so that for each hydroxyl group of component B) there is from 0.3 to 1 uretdione group of component A).

    摘要翻译： 包含在低温下可硬化的脲二酮基团的高反应性聚氨酯粉末涂料组合物含有A）至少一种基于脂族（（））脂族或脂环族多异氰酸酯和含羟基化合物的含有脲二酮的粉末涂料硬化剂，所述固化剂 熔点为40-130℃，游离NCO含量小于5重量％，脲二酮含量为6-18重量％; B）至少一种含羟基的聚合物，其熔点为40-130℃，OH值为20-200mg KOH / g; C）0.001-3重量％的至少一种羧酸四烷基铵催化剂，基于组分A）和B）的总量。 组分A）和B）以比例存在，使得对于组分B）的每个羟基，组分A）为0.3至1个脲二酮基团。