会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明授权
    • Process for producing aromatic polyesters
    • 制备芳族聚酯的方法
    • US4311823A
    • 1982-01-19
    • US108951
    • 1979-12-31
    • Shozaburo ImaiHaruo SuzukiKuniaki AsaiKatsuji Ueno
    • Shozaburo ImaiHaruo SuzukiKuniaki AsaiKatsuji Ueno
    • C08G63/00C08G63/60
    • C08G63/605
    • In a process for producing aromatic polyesters by bulk condensation of polyester forming reactant the improvement which comprises using three reaction vessels, reacting a reactant compound with an acid anhydride to effect an alkanolylation reaction in the first reaction vessel to thereby prepare a monomer, removing the acids by-produced in said reaction, forming or not forming an oligomer from a part or whole of said monomer, then transferring the reaction product of the first vessel into the second reaction vessel, polycondensing said monomer and/or oligomer to produce a prepolymer in the second reaction vessel, transferring the reaction product of the second vessel into the third reaction vessel, and heating said prepolymer in said third reaction vessel, thereby obtaining an aromatic polyester of high polymerization degree.
    • 在通过聚酯形成反应物的体积缩合制备芳族聚酯的方法中,其改进包括使用三个反应容器,使反应物化合物与酸酐反应以在第一反应容器中进行烷基聚合反应,从而制备单体,除去酸 在所述反应中副产物,从所述单体的一部分或全部形成或不形成低聚物,然后将第一容器的反应产物转移到第二反应容器中,使所述单体和/或低聚物缩聚以在 第二反应容器,将第二容器的反应产物转移到第三反应容器中,并加热所述第三反应容器中的所述预聚物,从而获得高聚合度的芳族聚酯。