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Stevens James C, Neithamer David R: Metal complex compounds, process for preparation and method of use.. Dow Chemical, March 20, 1991: EP0418044-A2 (58 worldwide citation)

A monocyclopentadienyl or substituted monocyclopentadienyl metal complex containing compound useful as an addition polymerization catalyst corresponds to the formula: CpMXnA wherein: Cp is a single eta -cyclopentadienyl or eta -substituted cyclopentadienyl group optionally covalently bonded to M thr ...


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Timmers Francis J, Devore David D, Stevens James C, Rosen Robert K, Patton Jasson T, Neithamer David R: Biscyclopentadienyl diene complexes. Dow Chemical, May 28, 1997: EP0775148-A1 (26 worldwide citation)

Olefins are polymerized by the use of catalysts comprising biscyclopentadienyl, Group 4 transition metal complexes formed with conjugated dienes wherein the diene is bound to the transition metal either in the form of a sigma -complex or a pi -complex in combination with activating cocatalysts.


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Devore David D, Timmers Francis J, Neithamer David R: Metallocene cocatalyst. Dow Chemical, January 13, 1999: EP0889911-A1 (9 worldwide citation)

Boratabenzene cocatalysts, especially novel pentafluorophenyl boratabenzenes, are useful cocatalysts or activators with metallocenes. They are less expensive than prior art activators, are soluble and offer more irreversible reactions. Compositions comprise at least one metallocene catalyst and at l ...


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Devore David D, Neithamer David R, Lapointe Robert E, Mussell Robert D: Silylium cationic polymerization activators for metallocene complexes. Dow Chemical, July 2, 1997: EP0781299-A2 (6 worldwide citation)

Catalyst systems useful in addition polymerisation reactions comprising a Group 4 metal complex and a silylium salt activating cocatalyst are prepared by contacting the metal complex with a silylium salt of a compatible, non-coordinating anion, optionally the silylium salt is prepared by electrochem ...


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Campbell Richard E Jr, Devore David D, Jacobsen Grant B, Lapointe Robert E, Neithamer David R: Supported catalyst comprising expanded anions. The Dow Chemical Company, DELINE Douglas N, April 5, 2001: WO/2001/023442 (2 worldwide citation)

A composition useful as an addition polymerization catalyst comprising: (a) an inert support; (b) a Group 3-10 or Lanthanide metal complex; and (c) an activator compound capable of causing the metal complex B to form an active polymerization catalyst, said compound corresponding to the formula (I): ...


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Carnahan Edmund M, Carney Michael J, Neithamer David R, Nickias Peter N, Shih Keng Yu, Spencer Lee: Supported catalyst containing tethered cation forming activator. Dow Chemical, Grace W R & Co, September 16, 1998: EP0863919-A1 (1 worldwide citation)

A support for use in preparing supported catalysts for addition polymerizations comprising the reaction product of: (A) an inorganic oxide material comprising reactive surface hydroxyl groups, at least some of said hydroxyl groups optionally having been functionalized and converted to a reactive sil ...


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Timmers Francis J, Devore David D, Stevens James C, Rosen Robert K, Patton Jasson T, Neithamer David R: Biscyclopentadienyl diene complexes, their preparation and catalyst compositions containing them. Dow Chemical, May 12, 1999: EP0915098-A2

Biscyclopentadienyl, Group 4 transition metal complexes are formed by contacting a biscyclopentadienyl Group 4 metal halide, hydrocarbyl, hydrocarbyloxy or amide complex with a conjugated diene. When combined with standard activating cocatalysts or activated with an activating technique, the complex ...


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Devore David D, Lapointe Robert E, Neithamer David R, Mussell Robert D: Preparation of silylium salts. Dow Chemical, March 11, 1998: EP0827962-A2

Silylium salts corresponding to the formula: R3Si(X')qA wherein R independently each occurrence is selected from hydrocarbyl, silyl, hydrocarbyloxy, dihydrocarbylamino, and combinations thereof having up to 30 nonhydrogen atoms, X' is an optional Lewis base having up to 20 nonhydrogen atoms, q is 0 ...


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Stevens James C, Neithamer David R: Metal complex compounds, process for preparation and method of use. Dow Chemical, April 2, 1997: EP0765882-A2

A monocyclopentadienyl or substituted monocyclopentadienyl metal complex containing compound useful as an addition polymerization catalyst corresponds to the formula: CpMXnA wherein: Cp is a single eta -cyclopentadienyl or eta -substituted cyclopentadienyl group optionally covalently bonded to M thr ...


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