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    • 8. 发明授权
    • Cationic aqueous emulsion systems
    • 阳离子水性乳液体系
    • US4169080A
    • 1979-09-25
    • US902596
    • 1978-05-04
    • Arthur T. Spencer
    • Arthur T. Spencer
    • C08G18/08C08G18/60C08G18/80C09D5/44C08L63/02C08L79/02C08L91/00
    • C08G18/603C08G18/0814C08G18/8064C09D5/4461
    • Water based coatings have been developed comprising water containing dispersed liquid droplets of water immiscible, hydroxy functional organic material, which are emulsified in the water, the water having dispersed therein an amine salt constituted by a salt of a solubilizing acid with a polyamide having a plurality of terminal primary amine groups. About one of the primary amine groups in the polyamide is unsubstituted, and at least about 70% of the isocyanate-reactive amino hydrogen atoms in the polyamide other than in the unsubstituted primary amine group are reacted with one isocyanate group of an organic polyisocyanate, the remaining isocyanate groups of which are blocked by a volatile blocking agent. The blocked isocyanate groups are nonreactive at room temperature and the unblocked isocyanate groups are reactive with the hydroxy functionality of the organic hydroxy functional material at elevated temperature. These coatings can be applied by electrocoating or other more conventional application methods and are curable to hard, flexible, solvent resistant films suitable for use in primer and other coatings applications.
    • 已经开发了水性涂料,其包含水分散的液体水,不混溶的羟基官能有机材料,其在水中乳化,水分散有由增溶酸的盐构成的胺盐与具有多个 的末端伯胺基团。 聚酰胺中的一个伯胺基团是未被取代的,除了未取代的伯胺基以外,聚酰胺中至少约70%的异氰酸酯反应性氨基氢原子与有机多异氰酸酯的一个异氰酸酯基团反应, 剩余的异氰酸酯基团被挥发性封闭剂阻断。 封端的异氰酸酯基团在室温下是非反应性的,未封端的异氰酸酯基团在高温下与有机羟基官能材料的羟基官能团反应。 这些涂层可以通过电涂或其他更常规的施用方法施用,并且可固化成适合用于底漆和其它涂料应用的硬,柔性,耐溶剂的膜。