A copolymer of ethylene and at least one comonomer containing at least 4 carbon atoms is characterized by a polydispersity greater than 2, a broad melting point transition as measured by differential scanning calorimetry, and a narrow composition distribution. Ethylene/C4+ copolymers also may show at least one peak melting point above the peak melting point of a random copolymer of the same monomer unit composition. These copolymers are made by contacting ethylene and a comonomer under polymerization conditions in the presence of a suitable fluxional catalyst system.

Title
Methods of production of ethylene copolymers having narrow composition distributions and high melting temperatures
Application Number
10/077300
Publication Number
20020115805
Application Date
February 15, 2002
Publication Date
August 22, 2002
Inventor
Raisa L Kravchenko
Wilmington
DE, US
Jennifer L Maciejewski Petoff
Belle Mead
NJ, US
Robert M Waymouth
Palo Alto
CA, US
Agent
Innovation Law Groupsm
CA, US
Agent
Jacques M Dulin Esq
CA, US
Assignee
The Board of Trustees of the Leland Stanford Junior University
IPC
C08F 04/44
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