公开(公告)号：US11174348B2

公开(公告)日：2021-11-16

申请号：US16327517

申请日：2017-11-09

Applicant: Dow Global Technologies LLC

Inventor： Nima N. Nikbin ,  David A. Babb

IPC: C08G64/34 ,  C08G64/02 ,  C08G65/26 ,  C08L69/00 ,  B01J27/26 ,  B01J31/18 ,  C08G64/20 ,  C08G18/44

Abstract: A method of manufacturing a poly(ether-carbonate) polyol comprises a polymerization stage that includes polymerizing carbon dioxide and at least one alkylene oxide, with a starter, in the presence of a double metal cyanide polymerization catalyst and a catalyst promoter that is devoid of halide anions and cyanide. The catalyst promoter is separate from the double metal cyanide polymerization catalyst.

公开(公告)号：US20190256652A1

公开(公告)日：2019-08-22

申请号：US16327517

申请日：2017-11-09

Applicant: Dow Global Technologies LLC

Inventor： Nima N. Nikbin ,  David A. Babb

IPC: C08G64/34 ,  C08G64/02 ,  C08G65/26 ,  C08L69/00

Abstract: A method of manufacturing a poly(ether-carbonate) polyol comprises a polymerization stage that includes polymerizing carbon dioxide and at least one alkylene oxide, with a starter, in the presence of a double metal cyanide polymerization catalyst and a catalyst promoter that is devoid of halide anions and cyanide. The catalyst promoter is separate from the double metal cyanide polymerization catalyst.

公开(公告)号：US10920013B2

公开(公告)日：2021-02-16

申请号：US16326880

申请日：2017-09-17

Applicant: Dow Global Technologies LLC

Inventor： Nima N. Nikbin ,  Carlos M. Villa ,  Maria Jose Nieves Remacha ,  Irfan Khan ,  William H. Heath ,  John G. Pendergast, Jr. ,  Matthias Schaefer ,  Anna Forlin

IPC: C08G65/26 ,  B01J19/24 ,  B01J8/02

Abstract: Alkylene oxides are polymerized in a tubular reactor. The alkylene oxide is continuously introduced into the tubular reactor through multiple introduction points located along the length of the tubular reactor. Monomer flow rates are increased along the length of the reactor to maintain a nearly constant concentration of unreacted alkylene oxide.

公开(公告)号：US20190202983A1

公开(公告)日：2019-07-04

申请号：US16326880

申请日：2017-09-17

Applicant: Dow Global Technologies LLC

Inventor： Nima N. Nikbin ,  Carlos M. Villa ,  Maria Jose Nieves Remacha ,  Irfan Khan ,  William H. Heath ,  John G. Pendergast, Jr. ,  Matthias Schaefer ,  Anna Forlin

IPC: C08G65/26 ,  B01J19/24 ,  B01J8/02

CPC classification number: C08G65/2696 ,  B01J8/0221 ,  B01J8/0278 ,  B01J19/2415 ,  B01J19/242 ,  B01J19/243 ,  B01J19/244 ,  B01J19/2475 ,  B01J2208/00088 ,  B01J2208/00212 ,  B01J2208/0053 ,  B01J2219/00094 ,  B01J2219/00164 ,  B01J2219/182 ,  B01J2219/1923 ,  C08G65/2663

Abstract: Alkylene oxides are polymerized in a tubular reactor. The alkylene oxide is continuously introduced into the tubular reactor through multiple introduction points located along the length of the tubular reactor. Monomer flow rates are increased along the length of the reactor to maintain a nearly constant concentration of unreacted alkylene oxide.