Union Carbide Chemicals & Plastics Technology Corporation

Karen E Breetz

Robert J Jorgensen

Guylaine St Jean

Jose Fernando Cevallos-Candau

Cliff Robert Mure

Thomas Edward Spriggs

Stephen Paul Jaker

Dale A Wright

A process for polymerizing polyethylene with chromium-based catalysts wherein one or more supported chromium-based catalysts is mixed with mineral oil to form a slurry and the slurry is then introduced into a polymerization reactor, especially a gas-phase polymerization reactor.

Chromium-based catalysts in mineral oil for production of polyethylene

Polyethylene resins having improved environmental stress crack resistance, stiffness and impact resistance is made by a process comprising feeding both a chromium oxide catalyst and a silyl chromium catalyst into a polymerization reactor. The chromium oxide catalyst and the silyl chromium catalyst are on separate supports. The chromium oxide catalyst is 25&#x2013;50 weight percent and the silyl chromium catalyst is 50&#x2013;75 weight percent of the total weight of catalyst. The catalysts may be added separately or as a single mixture.

Blow molding resins with improved ESCR

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Morgantown, WV, United States of America

Karen E Breetz