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    • 3. 发明申请
    • WATERBORNE URETHANE-BASED TWO-COAT COATING SYSTEMS, USE THEREOF AND SUBSTRATES COATED WITH THEM
    • 基于水性的两层涂层系统,其使用及其涂层基材
    • US20100324199A1
    • 2010-12-23
    • US12598803
    • 2008-04-30
    • Anne FickersHeinz-Peter RinkAndreas Dopp
    • Anne FickersHeinz-Peter RinkAndreas Dopp
    • C08L75/04B05D3/02
    • C08G18/4288C08G18/0823C08G18/12C08G18/637C08G18/6659C08G18/672C08G18/765C08G18/82C08L33/00C08L75/04C09D133/08C09D175/04C08G18/3206C08G18/282C08G18/3275C08L2666/02
    • The present invention relates to an aqueous clearcoat material for producing a waterborne urethane-based two-coat coating system, which comprises at least one secondary polyacrylate dispersion having a polyacrylate glass transition temperature Tg≧20° C. and at least one hybrid polyacrylate-polyurethane dispersion with a weight ratio of the polyacrylate fraction of the secondary dispersion to the polyacrylate-polyurethane fraction of the hybrid dispersion of 1:1 to 4:1, preferably 2:1 to 3:1, more preferably 2.25:1 to 2.75:1, and as curing agent at least one low-viscosity aminosulfonic polyisocyanate and an aqueous basecoat material for producing a waterborne two-coat coating system which comprises at least one polyurethane dispersion, at least one hybrid polyacrylate-polyurethane dispersion, and at least one melamine resin. The present invention additionally relates to a waterborne two-coat coating system comprising the aqueous clearcoat material and the aqueous basecoat material, to a process for producing it, to its use to coat a substrate, and to substrates coated with it.
    • 本发明涉及一种用于生产水性聚氨酯基双层涂层系统的水性透明涂料,其包含至少一种具有聚丙烯酸酯玻璃化转变温度Tg≥20℃的至少一种二次聚丙烯酸酯分散体和至少一种混合聚丙烯酸酯 - 聚氨酯 分散体,其中二分散体的聚丙烯酸酯部分与混合分散体的聚丙烯酸酯 - 聚氨酯部分的重量比为1:1至4:1,优选为2:1至3:1,更优选为2.25:1至2.75:1 ,以及作为固化剂的至少一种低粘度氨基磺酸多异氰酸酯和用于生产水性双涂层涂料体系的水性底漆材料,其包含至少一种聚氨酯分散体,至少一种混合聚丙烯酸酯 - 聚氨酯分散体和至少一种三聚氰胺树脂 。 本发明还涉及一种水性双涂层涂层系统,其包含透明涂料水性和底漆底层材料,其制造方法,其用于涂覆基材的涂料,以及涂布在其上的基材。