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    • 40. 发明申请
    • TRANSIENTLY INHIBITED UREA AND URETHANE-UREA HYBRID COATING COMPOSITIONS
    • 瞬时抑制尿素和尿素尿素混合涂料组合物
    • WO2009005668A1
    • 2009-01-08
    • PCT/US2008/007912
    • 2008-06-25
    • THE SHERWIN-WILLIAMS COMPANYVOLKMER, Chad, H.STAUNTON, Thomas, J.
    • VOLKMER, Chad, H.STAUNTON, Thomas, J.
    • C08G18/08C08G18/32C09D175/02
    • C08G18/089C08G18/3262C09D175/02
    • A solvent borne, curable coating composition includes a resin formed to have an amine functional moiety, and, optionally, a hydroxyl functional compound; at least one polyisocyanate, and; at least one volatile, salt-forming organic acid and an inert solvent. The compositions may further include an organometallic catalyst. It is believed that the volatile organic acid temporarily drives the formation of amine salts in the composition, thereby inhibiting amine/isocyanate crosslinking, and, where an organometallic catalyst is present, inhibits catalysis. Both of these inhibitory effects are reversed upon acid evaporation, which may substantially occur after the composition has been applied to a substrate. The delay in crosslinking achieved by use of the acid, however, may facilitate more complete evaporation of solvents from the coating, resulting in improved coating properties.
    • 溶剂型可固化涂料组合物包括形成具有胺官能部分的树脂和任选的羟基官能化合物; 至少一种多异氰酸酯,和 至少一种挥发性成盐有机酸和惰性溶剂。 组合物还可以包括有机金属催化剂。 据信挥发性有机酸暂时驱动组合物中胺盐的形成,从而抑制胺/异氰酸酯交联,并且当存在有机金属催化剂时,其抑制催化。 这两种抑制作用在酸蒸发后都是相反的,这可以在将组合物施用于基材之后基本上发生。 然而,通过使用酸实现的交联延迟可以促进溶剂从涂层中更完全的蒸发,从而改善了涂层性能。