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:
Oct. 25, 2022
Filed:
Sep. 14, 2018
Dow Global Technologies Llc, Midland, MI (US);
Northwestern University, Evanston, IL (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);
Anthony P. Gies, Lake Jackson, TX (US);
Manjiri R. Paradkar, Lake Jackson, TX (US);
Justin M. Notestein, Evanston, IL (US);
SonBinh T. Nguyen, Evanston, IL (US);
Dow Global Technologies LLC, Midland, MI (US);
Northwestern University, Evanston, IL (US);
Abstract
A method of producing a polyether polyol that includes reacting a low molecular weight initiator with one or more monomers in the presence of a polymerization catalyst, the low molecular weight initiator having a number average molecular weight of less than 1,000 g/mol and a nominal hydroxyl functionality at least 2, the one or more monomers including at least one selected from propylene oxide and butylene oxide, and the polymerization catalyst being a Lewis acid catalyst having the general formula M(R)(R)(R)(R). Whereas, M is boron, aluminum, indium, bismuth or erbium, R, R, and Reach includes a same fluoroalkyl-substituted phenyl group, and optional Rincludes a functional group or functional polymer group. The method further includes forming a polyether polyol having a number average molecular weight of greater than the number average molecular weight of the low molecular weight initiator in the presence of the Lewis acid catalyst.