Union Carbide Chemicals & Plastics Technology Corporation

Union Carbide Chemicals and Plastics Company, Inc.

Arakalgud V Ramamurthy

Clark Curtis Williams

Burkhard Eric Wagner

Mark Gregory Goode

Mahmoud R Rifi

Thomas Edward Spriggs

Paul T Daniell

Michael William Tilston

Joseph Z Pawlowski

Liquid catalyst composition is fed to a fluidized bed olefin polymerization reactor through an ultrasonic nozzle, enabling improved control over average catalyst composition droplet size and size distribution, which provides better control over resin particle size. The spray may be surrounded by a shroud of gas which creates a particle lean zone, thus reducing the likelihood of contact by the catalyst composition with existing product particles already suspended in the fluid bed.

Ultrasonic catalyst feed for fluid bed olefin polymerization

The present invention teaches the use of an effervescent nozzle to deliver liquid catalyst to a gas phase polymerization system.

Control of solution catalyst droplet size with an effervescent spray

A process for the production of an in situ particulate polyethylene blend comprising contacting a magnesium/titanium based catalyst system including a particulate precursor with one or more alpha-olefins in each of two or more reactors connected in series, in the gas phase, under polymerization conditions, with the provisos that:

Process for preparing an in situ polyethylene blend

A gas phase process for the production of a polyethylene blend comprising contacting ethylene and at least one alpha-olefin comonomer having 3 to 8 carbon atoms with a magnesium/titanium based catalyst system including an activator and a cocatalyst in each of two fluidized bed reactors connected in series, under polymerization conditions, with the provisos that:

Process of producing ethylene polymer blends in gas phase

A process for substantially eliminating surface melt fracture during extrusion of a thermoplastic polymer such as a molten narrow molecular weight distribution, linear, ethylene copolymer, by incorporating into the thermoplastic polymer a wood rosin or wood rosin derivative.

Process for substantially eliminating surface melt fracture during

A process for substantially eliminating surface melt fracture during extrusion of a thermoplastic polymer such as a molten narrow molecular weight distribution, linear, ethylene copolymer, by using a die having a die land region defining opposing surfaces at least one of which is coated with a composition containing about 80% to 99% nickel and about 1% to 20% phosphorous.

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East Windsor, NJ, United States of America

Arakalgud V Ramamurthy