公开(公告)号：US20220089813A1

公开(公告)日：2022-03-24

申请号：US17424259

申请日：2020-01-06

Applicant: Dow Global Technologies LLC

Inventor： Marinus A. Bigi ,  Nima Nikbin

IPC: C08G64/40 ,  C08G64/02 ,  C08G64/30 ,  B01J20/26 ,  B01J20/18

Abstract: Alkylene carbonates are removed from polyether-carbonate polymers by contacting the polyether-carbonate with an absorbent at a temperature of 30 to 150° C. The process is effective and inexpensive. The purified polyether-carbonate is useful for making polyurethanes as well as in many other applications.

公开(公告)号：US20250115711A1

公开(公告)日：2025-04-10

申请号：US18695916

申请日：2022-09-30

Applicant: Dow Global Technologies LLC

Inventor： David K. Steelman ,  Nima Nikbin ,  Arjun Raghuraman ,  Robin P. Ziebarth ,  John W. Weston

IPC: C08G65/26 ,  C08K5/06

Abstract: Alkylene oxides are polymerized in the presence of a catalyst system that includes a double metal cyanide catalyst. At least one additive is present. The additive is an alkali metal, ammonium or quaternary ammonium salt of a monocarboxylic acid having up to 24 carbon atoms; monobasic potassium phosphate, a monobasic ammonium or quaternary ammonium phosphate, a dibasic ammonium and quaternary ammonium phosphate or phosphoric acid.

公开(公告)号：US20190309126A1

公开(公告)日：2019-10-10

申请号：US16346859

申请日：2017-11-09

Applicant: Dow Global Technologies lLC

Inventor： Nima Nikbin ,  David A. Babb

IPC: C08G64/34 ,  C08G64/20 ,  B01J27/26 ,  B01J31/18

Abstract: Polycarbonate polyols are made by copolymerizing carbon dioxide and an alkylene oxide in the presence of a starter compound and a carbonate catalyst. The process is operated in semi-batch mode by combining starter, catalyst and a small amount of alkylene oxide in a reaction vessel, pressurizing the vessel with carbon dioxide, initiating polymerization, and then feeding both carbon dioxide and alkylene oxide to the vessel under polymerization conditions without removal of product until the feeds are completed.

公开(公告)号：US20240392068A1

公开(公告)日：2024-11-28

申请号：US18695912

申请日：2022-09-30

Applicant: Dow Global Technologies LLC

Inventor： David Keith Steelman ,  Nima Nikbin ,  Arjun Raghuraman ,  Robin P. Ziebarth ,  John W. Weston ,  Jean-Paul Masy

IPC: C08G65/26 ,  C08K3/32 ,  C08K5/098

Abstract: Alkylene oxides are polymerized in the presence of a catalyst system that includes a double metal cyanide catalyst that is modified with certain metal or semi-metal compounds. At least one additive is present. The additive is an alkali metal, ammonium or quaternary ammonium salt of a monocarboxylic acid having up to 24 carbon atoms; monobasic potassium phosphate, a monobasic ammonium or quaternary ammonium phosphate, a dibasic ammonium and quaternary ammonium phosphate or phosphoric acid.

公开(公告)号：US20210347940A1

公开(公告)日：2021-11-11

申请号：US17383491

申请日：2021-07-23

Applicant: Dow Global Technologies LLC

Inventor： Nima 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：US20250109246A1

公开(公告)日：2025-04-03

申请号：US18718858

申请日：2022-12-15

Applicant: Dow Global Technologies LLC

Inventor： Yusen Qiao ,  Nima Nikbin ,  Wanglin Yu

IPC: C08G64/18 ,  C08G64/32 ,  C08G64/34 ,  C08G65/26

Abstract: In nonionic surfactants that contain blocks of hydrophobic poly(alkylene oxide) polymer linked to blocks of hydrophilic poly(alkylene oxide) polymer, the biodegradability of the polymer is improved if the hydrophobic blocks are polymerized in the presence of carbon dioxide to add poly (alkylene carbonate) units into the hydrophobic block, in which the alkylene carbonate units make up from 1 to 40 weight percent of the hydrophobic polymer blocks. The resulting nonionic surfactants can have similar surfactant performance but improved biodegradability, as compared to related surfactants without alkylene carbonate units.

公开(公告)号：US12146027B2

公开(公告)日：2024-11-19

申请号：US17424259

申请日：2020-01-06

Applicant: Dow Global Technologies LLC

Inventor： Marinus A. Bigi ,  Nima Nikbin

IPC: C08G64/40 ,  B01J20/18 ,  B01J20/26 ,  C08G64/02 ,  C08G64/30 ,  C08G64/34 ,  C08G65/30

Abstract: Alkylene carbonates are removed from polyether-carbonate polymers by contacting the polyether-carbonate with an absorbent at a temperature of 30 to 150° C. The process is effective and inexpensive. The purified polyether-carbonate is useful for making polyurethanes as well as in many other applications.