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2. 发明公开

EP3167014A1 TWO-COMPONENT PAINT COMPOSITION AND MULTILAYER COATING FORMATION METHOD USING THIS 有权
标题翻译：双组分涂料组合物和使用这种方法的多层涂层形成方法
公开(公告)号：EP3167014A1
公开(公告)日：2017-05-17
申请号：EP15730982.4
申请日：2015-06-03
申请人： BASF Coatings GmbH
发明人： TSUNODA, Takeshi
IPC分类号： C09D4/06 , C08F220/20 , C09D133/06 , C09D183/00
CPC分类号： C09D133/066 , B05D7/532 , B05D7/56 , C08F220/20 , C08G77/442 , C08J3/241 , C08J3/243 , C08K5/3435 , C08K5/3475 , C09D4/06 , C09D7/63 , C09D143/04 , C09D183/00 , C09D183/10 , C08L43/04
摘要： [Purpose] Among two-component top coat paints for the automobile coatings field, wherein the base resin paint is circulated from a main tank with a pump upstream of the coating gun, and mixing and coating are effected using a curing agent supplied from a nitrogen-sealed tank and a two-component mixing device, to provide a paint composition with which problems such as thickening and gelling of the circulating base resin paint do not occur, coating is possible with a stabilized constant coating viscosity, and with which the paint film after stoving exhibits excellent Scratch resistance, stain resistance, acid resistance and gasoline resistance, and a multilayer coating formation method using this. [Solution] The present invention provides a two-component paint composition which is applied directly after mixing a base resin and a curing agent, wherein the base resin (A) contains a hydroxy group-containing acrylic resin (A-1) and a curing catalyst (A-2) as essential components, the curing agent (B) contains an isocyanate Compound (B-1) and an alkoxysilyl group-containing copolymer (B-2) as essential components, the aforesaid hydroxy group-containing acrylic resin (A-1) has a hydroxyl value of 80 to 180 mg KOH/g, a glass transition temperature of −40 to 40° C., and a weight average molecular weight of 2,000 to 20,000 g/mol, the aforesaid alkoxysilyl group-containing copolymer (B-2) is a copolymer obtained by copolymerizing 30 to 80 parts by weight of a vinylic monomer containing alkoxysilyl groups and 20 to 70 parts by weight of other copolymerizable monomers, its weight average molecular weight is 2,000 to 20,000 g/mol, and it does not contain hydroxy groups, carboxyl groups or amino groups which react with isocyanate groups.
摘要翻译： [目的]在用于汽车涂料领域的双组分顶涂涂料中，其中基础树脂涂料在涂料枪的上游用主泵从主罐循环，并且使用由氮气供应的固化剂进行混合和涂布密封罐和双组分混合装置，以提供一种涂料组合物，其中不会出现循环基础树脂涂料的增稠和凝胶化问题，可以以稳定的恒定涂布粘度进行涂布，并且使用该涂料组合物在烘干后表现出优异的耐刮擦性，耐沾污性，耐酸性和耐汽油性，以及使用其的多层涂层形成方法。本发明提供了一种双组分涂料组合物，其在基础树脂和固化剂混合后直接涂覆，其中基础树脂（A）含有含羟基丙烯酸树脂（A-1）和固化剂（B-2）作为必需成分，固化剂（B）含有异氰酸酯化合物（B-1）和含烷氧基甲硅烷基的共聚物（B-2）作为必需成分，上述含羟基丙烯酸类树脂 A-1）的羟值为80〜180mgKOH / g，玻璃化转变温度为-40〜40℃，重均分子量为2000〜20,000g / mol，上述含烷氧基甲硅烷基的共聚物（B-2）是将30〜80重量份含有烷氧基甲硅烷基的乙烯类单体和20〜70重量份其他可共聚单体共聚而得到的共聚物，其重均分子量为2000〜20,000g / mol，它不含羟基，羧基或氨基没有与异氰酸酯基团反应的基团。

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