Process for preparation of polyesters
    1.
    发明授权
    Process for preparation of polyesters 失效
    聚酯的制备方法

    公开(公告)号:US3984379A

    公开(公告)日:1976-10-05

    申请号:US487620

    申请日:1974-07-11

    摘要: According to this invention, during the formation of a fiber-forming polyester by the reaction of a dicarboxylic acid or its functional derivative with a glycol, an aromatic ortho-ester such as hexaphenyl ortho terephthalate is added to the molten polyester whereby a fiber-forming polyester of a low content of free carboxyl groups and diethylene glycol units is prepared. Moreover, the reaction rate of the polycondensation is greatly increased by selecting and using a suitable aromatic ortho-ester and thus there can be obtained a fiber-forming polyester of a very high molecular weight.

    摘要翻译: 根据本发明,在通过二羧酸或其官能衍生物与二醇反应形成纤维形成聚酯时,向熔融聚酯中加入邻苯二甲酸六苯酯等芳族原酸酯,由此形成纤维 制备低含量游离羧基和二甘醇单元的聚酯。 此外,通过选择和使用合适的芳族原酸酯,可以大大提高缩聚反应速度,因此可以得到非常高分子量的成纤聚酯。