公开(公告)号：US06344501B1

公开(公告)日：2002-02-05

申请号：US09646947

申请日：2000-10-23

申请人： Claudia Sierakowski ,  Karl-Heinz Grosse-Brinkhaus ,  Egon Wegner ,  Thomas Frey ,  Jörg Niemann ,  Joachim Woltering

发明人： Claudia Sierakowski ,  Karl-Heinz Grosse-Brinkhaus ,  Egon Wegner ,  Thomas Frey ,  Jörg Niemann ,  Joachim Woltering

IPC分类号： C08K320

CPC分类号： C09D163/00 ,  C08L75/04 ,  C09D5/02 ,  C09D133/068 ,  C08L2666/14

摘要： The present invention relates to an aqueous powder clearcoat dispersion comprising a solid pulverulent component A and an aqueous component B, where component A is a transparent powder coating material comprising a) at least one epoxy binder containing from 25 to 45% by weight, preferably from 25 to 35% by weight, of glycidyl-containing monomers, with or without a fraction of vinylaromatic compounds, preferably styrene, b) at least one crosslinking agent, preferably straight-chain, aliphatic dicarboxylic acids and/or carboxy-functional polyesters, and c) if desired, catalysts, auxiliaries, additives typical for transparent powder coating materials, such as devolatilizers, leveling agents, UV absorbers, free-radical scavengers, and antioxidants, and component B is an aqueous dispersion comprising a) at least one nonionic thickener and b) if desired, catalysts, auxiliaries, defoamers, wetting agents, antioxidants, UV absorbers, free-radical scavengers, biocides, small amounts of solvent, leveling agents, neutralizing agents, preferably amines, and/or water retention agents, and c) a dispersant medium in the form of a nonionic polyurethane dispersion.

摘要翻译： 本发明涉及包含固体粉状成分A和水性成分B的水性粉末透明涂料分散液，其中A是透明粉末涂料，其包含a）至少一种含25至45重量％，优选25至45重量％ 35重量％的含缩水甘油基的单体，具有或不含一部分乙烯基芳族化合物，优选苯乙烯，b）至少一种交联剂，优选直链的脂族二羧酸和/或羧基官能的聚酯，以及c）如果 所需的催化剂，助剂，透明粉末涂料的典型添加剂如脱挥发分剂，流平剂，UV吸收剂，自由基清除剂和抗氧化剂，组分B是一种水分散体，其包含a）至少一种非离子型增稠剂，和b）如果需要， 催化剂，助剂，消泡剂，润湿剂，抗氧化剂，紫外线吸收剂，自由基清除剂，杀生物剂，少量溶剂，水溶液 中和剂，优选胺和/或保水剂，和c）非离子聚氨酯分散体形式的分散剂介质。