Special optical polyester synthesis catalyst and preparation method and application thereof

The invention discloses a special optical polyester synthesis catalyst. The special optical polyester synthesis catalyst is formed by gamma-A100H and a catalyst promoter by mass of 1:10-9:10 and is a combination of one or multiple of ethylene glycol antimony, antimonous oxide, antimony acetate, tetrabutyl titanate and germanium dioxide. The invention further discloses a preparation method and application of the catalyst. Polyester synthesized by the obtained special optical polyester synthesis catalyst is good in optical performance, low in diethylene glycol and carboxyl-terminated content and applicable to manufacture of optical polyester films. 本发明公开了种光学聚酯合成专用催化剂，由γ-AlOOH与助催化剂按质量比1:10~9:10构成；所述助催化剂为乙二醇锑、三氧化二锑、醋酸锑、钛酸四丁酯、二氧化锗中的种或多种的组合。以及该催化剂的制备方法和应用。采用本发明所得到的光学聚酯合成专用催化剂合成出的聚酯具有优异的光学性能，且二甘醇和羧端基含量低，适合于光学聚酯薄膜的制造。