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.:

US 11613605 B1

Date of Patent:

Mar. 28, 2023

Filed:

Sep. 17, 2020

Block copolymers of cyclic esters and processes for preparing same

Applicant:

Ramot AT Tel-aviv University Ltd., Tel-Aviv, IL;

Inventors:

Moshe Kol, Tel Aviv, IL;

Tomer Rosen, Tel Aviv, IL;

Assignee:

Ramot at Tel-Aviv University Ltd., Tel-Aviv, IL;

Attorney:

Primary Examiner:

Gregory Listvoyb

Int. Cl.

CPC ...

C08G 63/08 (2006.01); C08G 63/82 (2006.01); C07F 3/02 (2006.01); C07D 213/38 (2006.01); B01J 31/18 (2006.01);

U.S. Cl.

CPC ...

C08G 63/08 (2013.01); B01J 31/181 (2013.01); C07D 213/38 (2013.01); C07F 3/02 (2013.01); C08G 63/823 (2013.01); B01J 2231/14 (2013.01); B01J 2531/22 (2013.01);

Abstract

Novel processes of preparing block polyester copolymers while precisely controlling the stereoconfiguration (e.g., tacticity), chemical composition and/or length of each unit (block) are provided. Block polyester copolymers featuring desirable combinations of two or more blocks featuring different stereoconfiguration (e.g., tacticity), chemical composition and/or length, including triblock, tetrablock and higher block copolymers are also provided. A novel family of organometallic magnesium complexes and uses thereof in preparing polyesters and block polyester copolymers are also provided.

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