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    • 5. 发明公开
    • COPOLYETHER ESTER POLYOL PROCESS
    • 共聚酯酯多元醇工艺
    • EP3092262A1
    • 2016-11-16
    • EP15702598.2
    • 2015-01-05
    • Invista Technologies S.A R.L.
    • BEATTY, Richard P.SUN, Qun
    • C08G65/20C08G65/30C08G65/332
    • C08G63/672C08G65/20C08G65/2696C08G65/30C08G65/3322
    • Disclosed is a process for manufacturing copolyether ester polyol comprising: (1) providing feedstock comprising polytetramethylene ether glycol having a number average molecular weight of 350 g/mol or less and an oligomeric cyclic ether content of 4.0% by weight or more and a diacid composition selected from alpha-omega alkanedioic acids of formula HO2C—(CH2)n—CO2H, where n is from 2 through 16 to a reaction zone maintained at reaction conditions to produce a crude polyol product; (2) feeding the crude polyol product of step (1) to a separation zone at separation conditions to produce a first separation product having an oligomeric cyclic ether content of 2.0% by weight or greater, and a second separation product comprising copolyether ester polyol having an oligomeric cyclic ether content of less than 2.0% by weight; and (3) recovering the second separation product.
    • 本发明涉及从包含具有低数均分子量的聚四亚甲基醚二醇的原料制备具有低低聚物环醚含量(例如低于约2.0重量%)的共聚醚酯多元醇的方法,所述聚四亚甲基醚二醇具有低数均分子量,例如350g / mol或更低,以及高的低聚环醚含量,例如约4.0重量%或更高。