申请人:E.I. DU PONT DE NEMOURS AND COMPANY
公开号:EP0230774A1
公开(公告)日:1987-08-05
A hydroxy functional urethane modified polyester resin and solvent-based thermosetting coating composition comprising said resin and blocked polyisocyanate crosslinking agent. The coating composition may be formulated as a hot sprayable, high solids coating composition suitable for use as chip resistant automotive vehicle primer suitable for use on body panel areas subject to chipping by stones, gravel and other road debris. Alternatively, the composition may be formulated as a high solids composition sprayable with conventional spraying equipment. The hydroxy functional urethane modified polyester resin is the product of polymerization of lactone monomers in the presence of hydroxy-containing urethane modified polyester precursor. The polymerization reaction nixture comprises between about 10 and about 80 weight percent the hydroxy-containing urethane modified polyester precursor and between about 90 and about 20 weight percent lactone monomers.
一种羟基功能脲改性聚酯树脂和基于溶剂的热固性涂料组合物,包括所述树脂和阻化聚异氰酸酯交联剂。该涂料组合物可以制成热喷涂,高固含量的涂料组合物,适用于用作防石击的汽车车身底漆,适用于车身板件易受石头、碎石和其他路面碎片破损的区域。或者,该组合物可以制成高固含量的涂料组合物,可用常规喷涂设备进行喷涂。羟基功能脲改性聚酯树脂是在含有羟基的脲改性聚酯前体的存在下,通过内酯单体的聚合反应制得。聚合反应混合物包括约10至80重量%的含羟基的脲改性聚酯前体和约90至20重量%的内酯单体。