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. 17, 2023
Filed:
Dec. 18, 2020
Applicant:
Brown University, Providence, RI (US);
Inventors:
Jerome R. Robinson, Providence, RI (US);
Xiang Dong, Providence, RI (US);
Assignee:
Brown University, Providence, RI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F 5/00 (2006.01); B01J 31/12 (2006.01);
U.S. Cl.
CPC ...
C07F 5/003 (2013.01); B01J 31/12 (2013.01);
Abstract
The present invention discloses new catalyst systems based on trivalent metal complexes of Formula I, which can facilitate the stereospecific ring-opening polymerization of (rac)-β-Butyrolactone (rac-BBL). Also provided is a process for the stereospecific synthesis of aliphatic polyesters using the catalysts of Formula I, including alcohols and polyols as chain-transfer agents to facilitate immortal ring-opening polymerization.