公开(公告)号：US09840580B2

公开(公告)日：2017-12-12

申请号：US15108486

申请日：2015-01-05

Applicant: INVISTA TECHNOLOGIES S.A.R.L.

Inventor： Richard P. Beatty ,  Qun Sun

IPC: C08G65/30 ,  C08G63/672 ,  C08G65/332 ,  C08G65/20 ,  C08G65/26

CPC classification number: C08G63/672 ,  C08G65/20 ,  C08G65/2696 ,  C08G65/30 ,  C08G65/3322

Abstract: 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.