Unsaturated polyesters
    10.
    发明授权
    Unsaturated polyesters 失效
    不饱和聚酯

    公开(公告)号:US5407772A

    公开(公告)日:1995-04-18

    申请号:US159176

    申请日:1993-11-30

    IPC分类号: C08G63/547 G03G9/087 G03G9/00

    摘要: Unsaturated linear polymers have repeating units of a reaction product of a first monomer, a second monomer, a third monomer and optionally a fourth monomer. The linear polymers have a glass transition temperature ranging from about 52.degree. C. to about 61.degree. C. The first monomer should have a weight average molecular weight less than 200. The second monomer may be a dicarboxylic acid or diester which is different than the third monomer. A concentration of second residues of the polymer, derived from the second monomer, ranges from about 3 wt. % to about 15 wt. %, based on the total weight of the polymer. The third monomer is an aromatic dicarboxylic acid or an ester thereof. In the polymer, a concentration of third residues, derived from the third monomer, ranges from about 40 wt. % to about 55 wt. %, based on the total weight of the polymer. The fourth monomer is a diol having a higher molecular weight than the first monomer. In a process for preparing the inventive polymer, the first, second, third monomer (and optionally a fourth monomer) and/or a catalyst undergo transesterification to form the unsaturated, linear polymer.

    摘要翻译: 不饱和线性聚合物具有第一单体,第二单体,第三单体和任选的第四单体的反应产物的重复单元。 线性聚合物的玻璃化转变温度为约52℃至约61℃。第一单体应具有小于200的重均分子量。第二单体可以是二羧酸或二酯,其不同于 第三单体。 衍生自第二单体的聚合物的第二残余物的浓度范围为约3wt。 %至约15wt。 %,基于聚合物的总重量。 第三单体是芳族二羧酸或其酯。 在聚合物中,衍生自第三单体的第三残基的浓度范围为约40wt。 %至约55wt。 %,基于聚合物的总重量。 第四单体是分子量高于第一单体的二醇。 在制备本发明聚合物的方法中,第一,第二,第三单体(和任选的第四单体)和/或催化剂进行酯交换以形成不饱和的线性聚合物。