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    • 2. 发明申请
    • PROCESS FOR PREPARING A POLYESTER RESIN
    • 制备聚酯树脂的方法
    • WO2006063908A1
    • 2006-06-22
    • PCT/EP2005/055955
    • 2005-11-14
    • AKZO NOBEL N.V.WINTERS, RobinDE VOS, Siebe, CornelisVENDERBOSCH, Rudolf, Anthonius, MariaPARDOEN, Johannes, Adrianus
    • WINTERS, RobinDE VOS, Siebe, CornelisVENDERBOSCH, Rudolf, Anthonius, MariaPARDOEN, Johannes, Adrianus
    • C08G63/91C08G63/16C08G81/00G03G9/087
    • C08G63/914C08G63/78
    • The present invention relates to a process for preparing a polyester resin having a gel content of less than 0.45 wt%, based on the total weight of the polyester resin, and a glass transition temperature of between 40 and 70°C, comprising the step of reacting a polyester resin precursor with a chain extender which is different from the building blocks of the polyester precursor resin, optionally in the presence of a catalyst, at a temperature between 170 and 300 °C in a continuous reactor, wherein the polyester resin precursor comprises a functional group present as end group selected from hydroxyl or carboxyl, and optionally a functional group in the polyester resin precursor backbone selected from hydroxyl, carboxyl, amine, and carbonate, and the molar ratio of the functional group in the polyester resin precursor backbone to the functional group present as end group is at most 10:1. The invention further pertains to a polyester resin having a gel content of less than 0.45 wt%, based on the total weight of the polyester resin, and a glass transition temperature of between 40 and 70°C, which is prepared from a polyester resin precursor and a chain extender which is different from the building blocks of the polyester precursor resin.
    • 本发明涉及一种制备聚酯树脂的方法,该聚酯树脂的凝胶含量基于聚酯树脂的总重量小于0.45重量%,玻璃化转变温度在40-70℃之间,包括以下步骤: 任选地在催化剂存在下,在连续反应器中使聚酯树脂前体与不同于聚酯前体树脂的结构单元的增链剂反应,其中聚酯树脂前体包括 存在于作为选自羟基或羧基的端基的官能团,以及选自羟基,羧基,胺和碳酸酯的聚酯树脂前体骨架中的官能团,以及聚酯树脂前体骨架官能团与 作为末端基团的官能团最多为10:1。 本发明还涉及一种聚酯树脂,该聚酯树脂的凝胶含量基于聚酯树脂的总重量小于0.45重量%,玻璃化转变温度为40-70℃,其由聚酯树脂前体 和与聚酯前体树脂的结构单元不同的扩链剂。