Exxon Chemical Patents, Inc.

Scott K Jackson

Vispi R Sagar

Eric John Markel

Palanisamy Arjunan

Bruce Alan Harrington

Eugene E Poirot

An ethylene cyclic olefin polymer, particularly an ethylene/norbornene copolymer and an ethylene/norbornene/alpha olefin terpolymer resin, of improved toughness and processibility for film production. This invention provides ethylene based resins which are processible like an LLDPE but which are significantly improved with respect to their capability to be fabricated into a film layer, particularly by a blown bubble extrusion technique. Films prepared of the resins of this invention are significantly improved with respect to certain of their film properties, such as tear strength, without detracting from the beneficial properties that an LLDPE-like resin otherwise provides to a film. Molding application of the above E/NB copolymers and E/NB/O terpolymers is also disclosed.

Ethylene polymers with a norbornene comonomer for LLDPE like resins of

The present invention relates to a gas phase process for the polymerization of olefins utilizing a metallocene catalyst system to produce polymers having a low density and a relatively high molecular weight. More particularly, the gas phase process of the invention is directed forward the production of very low density polymers, for example rubbers, elastomers and plastomers.

Gas phase polymerization process

A catalyst feed system is described for intermittent delivery of supported and/or prepolymerized supported catalyst to a polymerization reactor. The system incorporates valves with cylindrical sealing surfaces as well as a venting stage incorporating a filter arranged such that it is self-cleaning.

Growing community of inventors

Baytown, TX, United States of America

Scott K Jackson