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ExxonMobil Chemical Patents Inc
Original Assignee
Exxon Chemical Patents, Inc.
Bruce Allan Harrington
Exxonmobil Chemical Patents Inc.
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Filing date
Publication date
Priority claimed from US08/472,372external-prioritypatent/US5621054A/en
Application filed by Exxon Chemical Patents, Inc., Bruce Allan Harrington, Exxonmobil Chemical Patents Inc.filedCriticalExxon Chemical Patents, Inc.
Publication of CA2221569A1publicationCriticalpatent/CA2221569A1/en
Application grantedgrantedCritical
Publication of CA2221569CpublicationCriticalpatent/CA2221569C/en
Transition And Organic Metals Composition Catalysts For Addition Polymerization
(AREA)
Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications
(AREA)
Abstract
A copolymerization process suitable for the preparation of high crystalline melting point cyclic olefin copolymers comprising contacting ethylene, and at least one cyclic olefin with an active polymerization catalyst comprising a Group 4 transition metal compound containing an asymmetrically substituted monocyclopentadienyl ancillary ligand, a bulky substituent-containing heteroatom ligand, the monocyclopentadienyl and heteroatom ligands being covalently bridged is disclosed. Ethylene/norbornene copolymers prepared in accordance with the invention exibited crystalline melting points of about 250 °C, and were prepared at high catalyst activity levels with feed ratios less than 6:1 of norbornene to ethylene.
CA002221569A1995-06-071996-06-06Polymerization of crystalline copolymers of olefins and cyclic olefins
Expired - Fee RelatedCA2221569C
(en)
Olefin polymerization catalyst, component thereof and process for polymerizing olefins with the catalyst, the film and injection-molded article from the obtained polyolefin
Catalyst for olefin polymerization, process for olefin polymerization using the same, ethylene/.alpha.-olefin copolymer, graft modified ethylene/.alpha.-olefin copolymer, and ethylene copolymer composition