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    • 4. 发明授权
    • Aqueous coating compositions
    • 水性涂​​料组合物
    • US06204319B1
    • 2001-03-20
    • US09183458
    • 1998-10-30
    • Eric Charles HouzePatrick F. McIntyreHarry J. SpinelliAyumu Yokoyama
    • Eric Charles HouzePatrick F. McIntyreHarry J. SpinelliAyumu Yokoyama
    • C08K300
    • C09D17/001C01P2006/22C08J3/212C08J2353/00C09C1/56C09D5/027C09D17/005
    • An aqueous coating composition containing: (a) an aqueous carrier medium: (b) a pigment having a pH below 7.0; (c) an AB block copolymer pigment dispersant resin of (1) an A block of a hydrophobic polymer having amine groups; and (2) a B block of a hydrophilic polymer having hydroxyl groups and carboxyl groups; the AB block copolymer has a number average molecular weight of 5,000-20,000 and contains 20-80% by weight of a polymeric A segment and correspondingly 80-20% by weight of a polymeric B segment; wherein the pigment and the dispersant are present in a pigment to dispersant weight ratio of 0.1/1-20/1; (d) a film forming polymeric binder containing carboxyl groups and (e) a crosslinking agent which on curing of the coating composition will react with the carboxyl and hydroxyl groups of the AB block copolymer and the carboxyl groups of the film forming polymeric binder. Pigment dispersions of the AB block copolymer and process for forming the dispersions also are part of this invention.
    • 一种水性涂料组合物,其包含:(a)水性载体介质:(b)pH低于7.0的颜料;(c)(1)具有胺基的疏水性聚合物的A嵌段的AB嵌段共聚物颜料分散剂树脂; 和(2)具有羟基和羧基的亲水性聚合物的B嵌段; AB嵌段共聚物的数均分子量为5,000-20,000,并且包含20-80重量%的聚合物A链段,并且相应地为80-20 聚合物B链段的重量%;其中颜料和分散剂以颜料与分散剂的重量比为0.1 / 1-20 / 1存在;(d)含羧基的成膜聚合物粘合剂和(e)交联 涂料组合物的固化剂将与AB嵌段共聚物的羧基和羟基以及成膜聚合物粘合剂的羧基反应。AB嵌段共聚物的分散体和形成分散体的方法也是其中的一部分 发明。