The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 28, 2024
Filed:
Feb. 14, 2020
Dow Global Technologies Llc, Midland, MI (US);
Northwestern University, Evanston, IL (US);
Mihir Bhagat, Evanston, IL (US);
Charmaine Bennett, Evanston, IL (US);
Youlong Zhu, West Lafayette, IN (US);
SonBinh T. Nguyen, Evanston, IL (US);
Linda Broadbelt, Glenview, IL (US);
Justin M. Notestein, Evanston, IL (US);
Matthew E. Belowich, Midland, MI (US);
Arjun Raghuraman, Pearland, TX (US);
William H. Heath, Lake Jackson, TX (US);
Sukrit Mukhopadhyay, Midland, MI (US);
Heather A. Spinney, Midland, MI (US);
David R. Wilson, Midland, MI (US);
Dow Global Technologies LLC, Midland, MI (US);
Northwestern University, Evanston, IL (US);
Abstract
A method of producing a polyether alcohol that includes feeding an initiator into a reactor, feeding one or more monomers into the reactor, feeding a polymerization catalyst into the reactor, the polymerization catalyst being a Lewis acid catalyst having a general formula M(R)(R)(R)(R), separate from feeding the initiator into the reactor, feeding a hydrogen bond acceptor additive into the reactor, the hydrogen bond acceptor additive being a Cto Corganic molecule having at least two hydroxyl groups, of which two hydroxyl groups are situated in 1,2-, 1,3-, or 1,4-positions on the organic molecule, and allowing the initiator to react with the one or more monomers in the presence of the polymerization catalyst and the hydrogen bond acceptor additive to form a polyether alcohol having a number average molecular weight greater than a number average molecular weight of the initiator.