申请人:Far Eastern New Century Corporation
公开号:US10472464B2
公开(公告)日:2019-11-12
A method for producing a polyester includes: a) preparing a first monomer represented by Formula (1) for example—bis(β-hydroxyethyl) terephthalate (BHET); and b) preparing a second monomer represented by Formula (2) represented by Formula (2)—2-(2-hydroxyethoxy)ethyl 2-hydroxyethyl terephthalate (BHEET). The prepared first and second monomer are then mixed to form a mixture, and then the mixture is subjected to a pre-polymerization reaction at a first temperature not higher than 230° C. to form a prepolymer while a glycol compound represented by Formula (3) wherein R independently represents hydrogen, a C1-C6 linear or branched alkyl group, or phenyl; is continuously removed by distillation. The method also includes subjecting the prepolymer to a polymerization reaction at a second temperature higher than the first temperature to obtain the polyester.
生产聚酯的方法包括:a) 制备由式(1)代表的第一单体,例如-对苯二甲酸二(β-羟乙基)酯(BHET);b) 制备由式(2)代表的第二单体,即式(2)-2-(2-羟乙氧基)乙基对苯二甲酸二羟乙基酯(BHEET)。然后将制备的第一单体和第二单体混合形成混合物,然后在不高于 230℃的第一温度下对混合物进行预聚反应以形成预聚物,同时通过蒸馏连续除去由式(3)代表的乙二醇化合物,其中 R 独立地代表氢、C1-C6 直链或支链烷基或苯基。该方法还包括将预聚物在高于第一温度的第二温度下进行聚合反应,以获得聚酯。