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    • 2. 发明授权
    • Process for the preparation of aromatic polyesters
    • 芳香族聚酯的制备方法
    • US4401803A
    • 1983-08-30
    • US342007
    • 1982-01-18
    • Werner Rieder
    • Werner Rieder
    • B01J19/18C08G63/00C08G63/19C08G63/193C08G63/78C08G63/79C08G63/18C08G63/24
    • B01J19/1881C08G63/00C08G63/193B01J2219/00094
    • In a process for the preparation of aromatic polyesters by polycondensation of diphenols with chlorides of aromatic dicarboxylic acids by the two-phase interfacial polycondensation process, in which a dispersion as the reaction mixture is prepared from an aqueous phase, which contains the diphenolate formed with the aid of alkali metal hydroxide, and an organic-liquid phase containing the acid chlorides, this dispersion is passed, in the apparatus which is intended for carrying out the process and which comprises a reaction kettle and a dispersing device included with the latter in a circulation, through the dispersing device and the reaction kettle, the acid chloride dissolved in a largely anhydrous chlorinated solvent being continuously fed into this circulation at a point which, in the direction of flow, is upstream of the dispersing device.Preferably, the reaction mixture is here passed in the dispersing device through one or more mixing stages, in which it is each time raised to high velocities, and the kinetic energy of the mixture is then reduced to a value which is low compared with its maximum value.
    • PCT No.PCT / AT81 / 00016 Sec。 371日期1982年1月18日第 102(e)日期1982年1月18日PCT提交1981年6月26日PCT公布。 公开号WO82 / 00149 日本1982年1月21日。在通过二相界面缩聚方法通过二酚与芳族二羧酸的氯化物缩聚制备芳族聚酯的方法中,其中作为反应混合物的分散体由水相制备, 其含有借助碱金属氢氧化物形成的二酚盐和含有酰氯的有机液相,该分散体在用于进行该方法的装置中通过,该装置包括反应釜和分散装置 通过分散装置和反应釜将溶解在大部分无水氯化溶剂中的酰氯在分散装置的上游沿着流动方向连续供给到该循环中, 。 优选地,反应混合物在分散装置中通过一个或多个混合阶段,其中每个混合阶段每次都升高到高速度,然后将混合物的动能降低到与其最大值相比较低的值 值。
    • 6. 发明授权
    • Thermoplastic benzophenone polyester
    • 热塑性二苯甲酮聚酯
    • US4137218A
    • 1979-01-30
    • US807754
    • 1977-06-17
    • Dusan C. PrevorsekLeon Segal
    • Dusan C. PrevorsekLeon Segal
    • C08G63/195C08G63/18C08G63/24
    • C08G63/195
    • A thermoplastic benzophenone polyester consisting essentially of recurring units of the formula: ##STR1## having an intrinsic viscosity of at least 0.85 deciliter/gram as measured in 1:1 phenol/tetrachloroethane at 25.degree. C, is useful for making shaped articles having high impact strength.A process for preparing a thermoplastic polyester according to the above formula is also described which comprises the steps of (a) adding a solution of 4,4'-benzophenonedicarboxylic acid halide in an inert, water-immiscible organic solvent to a basic aqueous solution of a salt of 2,2-bis(4'-hydroxyphenyl)propane to form and precipitate the polyester during the addition and (b) recovering the precipitated polyester.There is also provided a shaped article prepared from the polyester having an impact strength of at least about 2 ft.lb./in. of notch as measured by the Izod impact test, ASTM D-256-56.
    • 基本上由在25℃下用1:1酚/四氯乙烷测量的特性粘度至少为0.85分升/克的下式的重复单元组成的热塑性二苯甲酮聚酯可用于制造具有高冲击强度的成型制品 强度。