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:
Nov. 07, 2017
Filed:
May. 23, 2016
Novomer, Inc., Ithaca, NY (US);
Scott D. Allen, Ithaca, NY (US);
Geoffrey W. Coates, Lansing, NY (US);
Anna E. Cherian, Ithaca, NY (US);
Chris A. Simoneau, Oxford, CT (US);
Alexei A. Gridnev, Ithaca, NY (US);
Jay J. Farmer, Ithaca, NY (US);
Saudi Aramco Technologies Company, Dhahran, SA;
Abstract
In one aspect, the present disclosure encompasses polymerization systems for the copolymerization of COand epoxides comprising 1) a catalyst including a metal coordination compound having a permanent ligand set and at least one ligand that is a polymerization initiator, and 2) a chain transfer agent having two or more sites that can initiate polymerization. In a second aspect, the present disclosure encompasses methods for the synthesis of polycarbonate polyols using the inventive polymerization systems. In a third aspect, the present disclosure encompasses polycarbonate polyol compositions characterized in that the polymer chains have a high percentage of —OH end groups and a high percentage of carbonate linkages. The compositions are further characterized in that they contain polymer chains having an embedded polyfunctional moiety linked to a plurality of individual polycarbonate chains.