1
Robert C Brady III, Frederick J Karol, Timothy R Lynn, Robert J Jorgensen, Sun Chueh Kao, Eric P Wasserman: Gas phase polymerization reactions utilizing soluble unsupported catalysts. Union Carbide Chemicals & Plastics Technology Corporation, M N Reinisch, May 31, 1994: US05317036 (201 worldwide citation)

Gas phase polymerization processes are disclosed which utilize unsupported soluble transition metal coordination catalysts. The catalysts are introduced into the reactor as a solution.


2
Frederick J Karol, George L Goeke, Burkhard E Wagner, William A Fraser, Robert J Jorgensen, Nils Friis: Preparation of ethylene copolymers in fluid bed reactor. Union Carbide Corporation, John S Piscitello, November 24, 1981: US04302566 (192 worldwide citation)

Ethylene copolymers having a density of .gtoreq.0.91 to .ltoreq.0.96 and a melt flow ratio of .gtoreq.22 to .ltoreq.32 are readily produced in a low pressure gas phase process at a productivity of .gtoreq.50,000 pounds of polymer per pound of Ti with a particulate catalyst diluted with an inert carr ...


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Isaac J Levine, Frederick J Karol: Preparation of low and medium density ethylene polymer in fluid bed reactor. Union Carbide Corporation, James J O Connell, March 8, 1977: US04011382 (114 worldwide citation)

A supported catalyst is used in the low pressure catalytic copolymerization of ethylene with C.sub.3 to C.sub.6 .alpha.-olefins in a fluid bed reactor to produce polymers having a density of less than 0.941 and a melt index of >0.0 to at least about 2.0. The supported catalyst contains about 0.05 to ...


5
Debra L Beran, Kevin J Cann, Robert J Jorgensen, Frederick J Karol, Norma J Maraschin, Arthur E Marcinkowsky: Ethylene polymerization using supported vanadium catalyst. Union Carbide Corporation, John S Piscitello, April 2, 1985: US04508842 (108 worldwide citation)

An ethylene polymerization catalyst comprising a supported precursor of vanadium trihalide/electron donor complex and alkylaluminum or boron halides, when combined with alkylaluminum cocatalyst and alkyl halide promoter provides enhanced polymerization and productivity plus superior polyethylene.


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Allen Noshay, Frederick J Karol, Robert J Jorgensen: Preparation of low-density ethylene copolymers in fluid bed reactor. Union Carbide Corporation, John S Piscitello, November 13, 1984: US04482687 (97 worldwide citation)

Ethylene copolymers having a density of about 0.91 to 0.94 and a melt flow ratio of about .gtoreq.26 to .ltoreq.40 are readily produced in a low pressure gas phase process at a productivity of .gtoreq.500,000 pounds of polymer per pound of Ti with a catalyst formed from selected organo aluminum comp ...


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Donald R Loveday, David H McConville, John F Szul, Kersten Anne Erickson, Simon Mawson, Tae Hoon Kwack, Frederick J Karol, David James Schreck: Catalyst composition, method of polymerization, and polymer therefrom. Univation Technologies, Lisa Kimes Jones, Jaimes Sher, August 14, 2001: US06274684 (87 worldwide citation)

Catalyst compositions and methods, useful in polymerization processes, utilizing at least two metal compounds are disclosed. At least one of the metal compounds is a Group 15 containing metal compound and the other metal compound is preferably a bulky ligand metallocene-type catalyst. The invention ...


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Rex E Murray, Simon Mawson, John F Szul, Kersten Anne Erickson, Tae Hoon Kwack, Frederick J Karol, David James Schreck: Multiple catalyst system. Univation Technologies, Jaimes Sher, Lisa Kimes Jones, January 22, 2002: US06340730 (84 worldwide citation)

This invention relates to a process to polymerize olefins comprising reacting olefins with a catalyst system comprising an activator, a metallocene and a second metal compound based on bidentate ligands containing heterocycle moieties.


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Walter T Reichle, Frederick J Karol, Gregory T Whiteker: Catalysts for the production of polyolefins. Union Carbide Chemicals & Plastics Technology Corporation, P W Leuzzi, June 18, 1996: US05527752 (78 worldwide citation)

A catalyst precursor is provided which is useful, when combined with a cocatalyst, in the manufacture of polyolefins. The catalyst precursor is of the formula: ##STR1## where M is a transition metal, preferably Zr or Hf; L is a substituted or unsubstituted, .pi. bonded ligand coordinated to M, prefe ...


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William A Fraser, Norma J Maraschin, Frederick J Karol, Alexander J Makai: High tear strength polymers. Union Carbide Corporation, John S Piscitello, November 16, 1982: US04359561 (72 worldwide citation)

Heterogeneous ethylene based hydrocarbon copolymers having high tear strength properties in film form, formed from ethylene, C.sub.3-4 monomer and C.sub.5-8 monomer with a molar ratio in the polymer of C.sub.3-4 /C.sub.2 of about 0.006 to 0.09, a C.sub.5-8 /C.sub.2 ratio of about 0.003 to 0.07 and h ...