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    • 8. 发明授权
    • Acrylic powder coating resin having low volatility
    • 丙烯酸粉末涂料具有低挥发性
    • US06878780B2
    • 2005-04-12
    • US10462263
    • 2003-06-16
    • Jeffrey A. GatesMichael S. Sharp
    • Jeffrey A. GatesMichael S. Sharp
    • C08F8/00C08F8/14C09D133/06
    • C09D133/068C08F8/14C08F2810/20C08L2666/34C08F120/32
    • Powder coating compositions having reduced volatility and improved processibility compared to conventional powder coatings consist essentially of a copolymer having pendant functionalities or pendant groups capable of reacting with a dicarboxylic acid such as the glycidyl groups of glycidyl acrylate or methacrylate copolymer and a cross-linking effective amount of a dicarboxylic acid. The reaction of the above pendant groups and the dicarboxylic acid cross-links or cures the powder coating after application to a substrate. The dicarboxylic acids according to the invention eliminate the need for a third component which is a flow control agent which improves the processibility of a two-component powder coating. The dicarboxylic acids according to the invention have a sublimation temperature great enough to decrease or prevent their vaporization during the curing of the powder coating and have a melting point low enough to impart improved flow properties to the powder coatings.
    • 与常规粉末涂料相比,具有降低的挥发性和改进加工性的粉末涂料组合物基本上由具有侧链官能团或能够与二羧酸反应的共聚物,例如丙烯酸缩水甘油酯或甲基丙烯酸酯共聚物的缩水甘油基和交联有效量 的二羧酸。 上述侧基与二羧酸交联后的反应,或在施涂于基材上之后固化粉末涂料。 根据本发明的二羧酸消除了对第三组分的需要,其是改善双组分粉末涂料的加工性能的流动控制剂。 根据本发明的二羧酸具有足够大的降低或防止其在粉末涂料固化期间的蒸发的升华温度,并具有足够低的熔点以赋予粉末涂料更好的流动性能。