羟基丙烯酸共聚物乙酰乙酰化反应及其聚合物应用研究

STUDIES ON HYDROXYL GROUP ACRYLIC RESINS ACETOACETYLATED AND APPLICATION

通过酯交换法可制得乙酰乙酰化丙烯酸共聚物。以ＣＣｌ３ＣＯＯＨ、ＣＨ３ＳＯ３Ｈ为催化剂在１２０℃或１４０℃条件下可制得乙酰乙酰化７０％以上的产物。乙酰乙酰基的引入，可降低体系溶液粘度。乙酰乙酰化丙烯酸共聚物与ＮＣＯ－ｆｒｅｅ聚氨酯组成新型涂料用树脂，具有无毒、高固含量、可室温固化等优良特性。

Acetoacetylated acrylic copolymers can be prepared by ester exchange reaction between hydroxyl acrylic copolymer and alkyl acetoacetate. The acetoacetylated degree can be more than 70 percent with using CCl 3COOH,[LJ1,H,DY0] CH 3 SO 3H as catalyst at 120 ℃ or 140 ℃. The acetoacetyl functionality can reduce solution viscosity. A new coating comprising acetoacetylated acrylic resin and NCO Free polyurethane bearing unsaturated end group was synthesized and possess the outstanding performance, such as NCO Free, high solid, ambient cure and usually polyurethane film properties.