Union Carbide Chemicals & Plastics Technology Corporation

Mark Wilton Smale

Frederick John Karol

Timothy R Lynn

Eric P Wasserman

Robert Converse Brady, Iii

Timothy Todd Wenzel

George Ernest Keller, Ii

Clark Curtis Williams

Eldon Ronald Larsen

Jean Bowman Cropley

Robert Converse Brady Iii

Arakalud Venkatapathia Ramamurthy

Keith Ernest Carmichael

A process for the gas-phase polymerization of polymers which allows for the introduction of an unsupported polymerization catalyst system into the gas-phase reactor, wherein the unsupported polymerization catalyst system comprises (i) a non-volatile materials fraction containing a polymerization catalyst; (ii) a solvent fraction which is at least partially miscible with the non-volatile materials fraction and which is sufficiently volatile to allow for the formation of polymerization catalyst particles when the mixture of the solvent fraction and the non-volatile materials fraction is sprayed into the reactor; (iii) a compressed fluid; and (iv) optionally a slowly vaporizing solvent.

Gas phase polymerization employing unsupported catalysts

Metallocene-containing catalyst compositions that include inert filler, a method for their preparation, and a method for their use in production of polyolefins are disclosed and claimed. The catalyst compositions contain solid particles of a mixture comprising a) a metallocene catalyst; b) a cocatalyst capable of activating said metallocene catalyst; and c) particulate filler material having an average particle size of less than about 10 micrometers that is unreactive with the metallocene catalyst and the cocatalyst. They are prepared by spray drying a slurry of the constituents.

Spray dried, filled metallocene catalyst composition for use in

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Bloomsbury, NJ, United States of America

Mark Wilton Smale