聚氨酯封补剂的合成应用研究

Investigation into Synthesis and Application of Polyurethane Defects-covering Agent

将聚醚、TDI投入反应釜中 ,在 60～ 80℃下反应 2 .5h ,加入扩链剂和丙酮在 60℃反应 3～ 5h ,加入有机硅油 ,继续反应 2h ,降温 ,将预先融解的合成蜡及其助剂在 80℃下加入 ,充分搅拌 30min ,降温即得成品。该品适用于漏浆皮、软伤残皮的封底、补伤。

Polyester and TDI are put into a reactor, reacted at 60_80?℃ for 2.5?h, added by chain extender and acetone, and reacted at 60?℃ for 3_5?h, followed by the addition of organic silicone oil, and then reacted for 2?h, and after that the temperature is decreased. At this time, the dissolved synthetic wax and auxiliary are put into the mixture at 80?℃, stirred completely to give the title product after the temperature decrease. The product is suitable in the basecoats and defects coverage finishings of bad-finished and light-damaged leathers