Tel Aviv University

Exxonmobil Chemical Patents Inc.

Other

Ramot University Authority for Applied Research and Industrial Development Limited

Moshe Kol

Matthew William Holtcamp

Konstantin Press

Garth Ronald Giesbrecht

Gregory S Day

David A Cano

Edit Tshuva

Tomer Rosen

Meagan E Evans

Eric D Whetmore

Yanay Popowski

Zeev Goldschmidt

Ayellet Stopper

Bruce Alan Harrington

Ad Cohen

A new family of mononuclear organometallic complexes of a divalent metal bound to sequential tetradentate monoanionic {ONNN}-type ligands, and polymerization of cyclic esters such as lactides utilizing same are provided. Novel tetradentate monoanionic {ONNN}-type ligands usable for forming these complexes are also provided.

Organometallic complexes of sequential tetradentate monoanionic ligands and uses thereof in ring opening polymerization of cyclic esters

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.

Block copolymers of cyclic esters and processes for preparing same

Use of homogeneous catalytic systems which include as a pre-catalyst a complex of a group 4 metal and a Salan ligand in the polymerization of alpha-olefins, is disclosed. The Salan ligand is characterized by a sequential diamino-containing skeleton unit which is non-symmetric, and the pre-catalysts can also be such that are devoid of a symmetry element. The disclosed polymerization results in alpha-olefin polymers such as polypropylene which are characterized by high levels of tacticity. Also disclosed are novel Salan ligands and novel complexes thereof with group 4 metals.

Metal complexes of salan-type ligands and uses thereof as catalysts for polymerization of alpha-olefins

Vinyl terminated polyolefins with long chain branching produced with Salan catalysts having carbazole moieties.

Vinyl terminated polyethylene with long chain branching

Polyalphaolefins and Salan catalysts, catalyst systems, and processes to produce the polyalphaolefins. Also disclosed are high-viscosity index polyalphaolefins and processes for producing them.

Polyalphaolefins prepared using modified Salan catalyst compounds

Disclosed herein are polyalphaolefins and Salan cataylsts, catalyst systems, and processes to produce the polyalphaolefins.

Polyalphaolefins prepared using modified salan catalyst compounds

A cyclopentadienyl-substituted Salan catalyst, a catalyst system comprising an activator and the cyclopentadienyl-substituted Salan catalyst, a process comprising contacting one or more olefins with the catalyst system, and polymers produced by the process are disclosed herein.

Cyclopentadienyl-substituted salan catalysts

Catalysts comprising long-bridged salen ligands comprising an imino-phenylene-alkylene-imino or an imino-napthalenylene-alkylene-imino bridged salen compound. Also, catalyst systems comprising the catalyst and an activator; methods to prepare the ligands, catalysts and catalyst systems; processes to polymerize olefins using the catalysts and/or catalyst systems; and the olefin polymers prepared according to the processes.

Long-bridged salen catalyst

Catalysts comprising salenol ligands are disclosed herein. Also, catalyst systems comprising the catalyst and an activator; methods to prepare the ligands, catalysts and catalyst systems; processes to polymerize olefins using the catalysts and/or catalyst systems; and the olefin polymers prepared according to the processes.

Salenol catalyst

A phenylene-bridged Salalen catalyst, a catalyst system comprising an activator and the phenylene-bridged Salalen catalyst, a process comprising contacting one or more olefins with the catalyst system, and polymers produced by the process are disclosed herein.

Phenylene-bridged salalen catalysts

Catalysts comprising thio-salalen ligands. Also, catalyst systems comprising the catalyst and an activator; methods to prepare the ligands, catalysts and catalyst systems; processes to polymerize olefins using the catalysts and/or catalyst systems; and the olefin polymers prepared according to the processes.

Thio-salalen catalyst

Catalysts comprising salan ligands with carbazole moieties. Also, catalyst systems comprising the catalyst and an activator; methods to prepare the ligands, catalysts and catalyst systems; processes to polymerize olefins using the catalysts and/or catalyst systems; and the olefin polymers prepared according to the processes.

Growing community of inventors

Ramat Gan, Israel

Moshe Kol