E.i. Dupont De Nemours and Company

The University of North Carolina at Chapel Hill

Daniel Joseph Tempel

Lynda Kaye Johnson

Maurice S Brookhart

Steven Dale Ittel

Christopher Moore Killian

Stephan James McLain

Kristina Ann Kreutzer

Jerald Feldman

Samuel David Arthur

Elizabeth Forrester McCord

Edward Bryan Coughlin

Anju Parthasarathy

Alison Margaret Bennett

Alison Margaret Anne Bennett

Disclosed herein are processes for polymerizing ethylene, acyclic olefins, and/or selected cyclic olefins, and optionally selected olefinic esters or carboxylic acids, and other monomers. The polymerizations are catalyzed by selected transition metal compounds, and sometimes other co-catalysts. Since some of the polymerizations exhibit some characteristics of living polymerizations, block copolymers can be readily made. Many of the polymers produced are often novel, particularly in regard to their microstructure, which gives some of them unusual properties. Numerous novel catalysts are disclosed, as well as some novel processes for making them. The polymers made are useful as elastomers, molding resins, in adhesives, etc. Also described herein is the synthesis of linear &agr;-olefins by the oligomerization of ethylene using as a catalyst system a combination a nickel compound having a selected &agr;-diimine ligand and a selected Lewis or Bronsted acid, or by contacting selected &agr;-diimine nickel complexes with ethylene.

&agr;-olefins and olefin polymers and processes therefor

Disclosed herein are processes for polymerizing ethylene, acyclic olefins, and/or selected cyclic olefins, and optionally selected olefinic esters or carboxylic acids, and other monomers. The polymerizations are catalyzed by selected transition metal compounds, and sometimes other co-catalysts. Since some of the polymerizations exhibit some characteristics of living polymerizations, block copolymers can be readily made. Many of the polymers produced are often novel, particularly in regard to their microstructure which gives some of them unusual properties. Numerous novel catalysts are disclosed, as well as some novel processes for making them. The polymers made are useful as elastomers, molding resins, in adhesives, etc. Also described herein is the synthesis of linear &agr;-olefins by the oligomerization of ethylene using as a catalyst system a combination a nickel compound having a selected &agr;-diimine ligand and a selected Lewis or Bronsted acid, or by contacting selected &agr;-diimine nickel complexes with ethylene.

Disclosed herein are processes for polymerizing ethylene, acyclic olefins, and/or selected cyclic olefins, and optionally selected olefinic esters or carboxylic acids, and other monomers. The polymerizations are catalyzed by selected transition metal compounds, and sometimes other co-catalysts. Since some of the polymerizations exhibit some characteristics of living polymerizations, block copolymers can be readily made. Many of the polymers produced are often novel, particularly in regard to their microstructure, which gives some of them unusual properties. Numerous novel catalysts are disclosed, as well as some novel processes for making them. The polymers made are useful as elastomers, molding resins, in adhesives, etc. Also described herein is the synthesis of linear .alpha.-olefins by the oligomerization of ethylene using as a catalyst system a combination a nickel compound having a selected .alpha.-diimine ligand and a selected Lewis or Bronsted acid, or by contacting selected .alpha.-diimine nickel complexes with ethylene.

.alpha.-olefins and olefin polymers and processes therefor

.alpha.-diimines for polymerization catalysts

Olefin polymers

Growing community of inventors

Carrboro, NC, United States of America

Daniel Joseph Tempel