公开(公告)号：US4948829A

公开(公告)日：1990-08-14

申请号：US347645

申请日：1989-05-05

申请人： Masaru Mitsuji ,  Mistugu Endo ,  Youji Kawachi ,  Akira Asada

发明人： Masaru Mitsuji ,  Mistugu Endo ,  Youji Kawachi ,  Akira Asada

IPC分类号： B05D1/36 ,  B05D5/06 ,  B05D7/02 ,  B05D7/16 ,  B05D7/24 ,  C08G18/08 ,  C08L61/20 ,  C08L75/04 ,  C09D4/02 ,  C09D133/06 ,  C09D175/00 ,  C09D175/04

CPC分类号： C09D133/06 ,  C08G18/0823 ,  C09D175/04 ,  B05D7/532 ,  C08L61/20 ,  C08L75/04

摘要： Disclosed are (1) an aqueous coating composition which is characterized in that the composition comprises:(A) an acrylic resin-type emulsion,(B) a urethane resin-type emulsion and(C) a crosslinking agentthe component (B) being a self-emulsifiable urethane emulsion prepard by subjecting a urethane prepolymer to reaction for chain extension by water and to emulsification after or during neutralization of the urethane prepolymer with a tertiary amine, the urethane prepolymer consisting essentially of (i) an aliphatic and/or alicyclic diisocyanate, (ii) a polyether diol and/or polyester diol both having a number-average molecular weight of about 500 to about 5000, (iii) a low-molecular weight polyhydroxyl compound and (iv) a dimethylolalkanoic acid in an NCO/OH ratio by equivalent of 1.1-1.9/1; and (2) a two-coat one-bake coating method characterized by use of said aqueous coating composition as the base-coat composition.

摘要翻译： 公开了（1）一种水性涂料组合物，其特征在于组合物包含：（A）丙烯酸树脂型乳液，（B）聚氨酯树脂型乳液和（C）交联剂，组分（B）为 一种可自乳化的聚氨酯乳液，其通过在氨基甲酸酯预聚物与叔胺中和之后使氨基甲酸酯预聚物进行水反应扩链和乳化，氨基甲酸酯预聚物基本上由（i）脂族和/或脂环族 二异氰酸酯，（ii）数均分子量为约500至约5000的聚醚二醇和/或聚酯二醇，（iii）低分子量多羟基化合物和（ⅳ）NCO / OH中的二羟甲基链烷酸 比例相当于1.1-1.9 / 1; 和（2）双层单烘烤涂布方法，其特征在于使用所述水性涂料组合物作为底涂层组合物。