Chevron Phillips Chemical Company LP

Phillips Petroleum Company

Other

Mark E Kertok

Max P McDaniel

Qing R Yang

Joel L Martin

Michael D Jensen

Matthew G Thorn

Elizabeth Ann Benham

Ashish M Sukhadia

Ted H Cymbaluk

Rajendra K Krishnaswamy

Gil R Hawley

Paul J DesLauriers

Mark L Gravley

Paul J Deslauriers

Max P Mcdaniel

Qing Yang

This invention relates to catalyst compositions comprising a first metallocene compound, a second metallocene compound, at least one chemically-treated solid oxide, and at least one organoaluminum compound. This invention also relates to methods to prepare and use the catalyst compositions and new polyolefins. The compositions and methods disclosed herein provide ethylene polymers and copolymers with lower MI, increased melt strength, and good MD tear properties.

Ethylene homopolymers or copolymers having good machine direction (MD) elmendorf tear strength

Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. Methods for preparing and using such catalysts to produce polyolefins are also provided. The compositions and methods disclosed herein provide ethylene polymers having a HLMI of from about 0.5 to about 25, a polymer density of from about 0.920 to about 0.965, and a polydispersity of from about 3.0 to about 30.

Polymerization catalysts and process for producing bimodal polymers in a single reactor

Catalyst compositions comprising a first metallocene compound, a second metallocene compound, a third metallocene compound, a chemically-treated solid oxide, and an organoaluminum compound are provided. Methods for preparing and using the catalyst and polyolefins are also provided. The compositions and methods disclosed herein provide ethylene polymers having decreased haze while minimizing impact on other properties, such as dart impact.

Resins that yield low haze films and the process for their production

Dual metallocene catalyst for producing film resins with good machine direction (MD) elmendorf tear strength

Vanes operatively attached to external sleeves are provided in a conduit to implement on the outside of the conduit change in the swirl angle of incoming fluids.

Carbon black reactor

A mixing apparatus particularly useful in carbon black pelleting has two parallel pinned shafts. The pins on each shaft are arranged in a double helix fashion with the pins interdigitating. The pins of each double helix are composed of two subsets of pins arranged in a single helix which single helices are, however, axially offset from each other. Thereby at any given axial location alternatingly opposite pin action is provided in the interdigitating zone, while surging of power is avoided.

Mixing apparatus

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Bartlesville, OK, United States of America

Mark E Kertok