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Stevens James C, Timmers Francis J, Wilson David R, Schmidt Gregory F, Nickias Peter N, Rosen Robert K, Knight George W, Lai Shih Yaw: Constrained geometry addition polymerization catalysts, processes for their preparation, precursors therefor, methods of use, and novel polymers formed therewith.. Dow Chemical, March 13, 1991: EP0416815-A2 (544 worldwide citation)

Metal coordination complexes comprising a metal of Group 3 (except Sc), 4-10 or the lanthanide series and a delocalized PI -bonded moiety have said moiety substituted with a constrain-inducing moiety which reduces the angle at the metal between the centroid of said PI -bonded moiety and at least one ...


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Lapointe Robert E, Stevens James C, Nickias Peter N, Mcadon Mark H: Homogeneous olefin polymerization catalyst by ligand abstraction with lewis acids.. Dow Chemical, December 30, 1992: EP0520732-A1 (292 worldwide citation)

Addition polymerization catalysts having a limiting charge separated structure corresponding to the formula: LMX XA, wherein: L is a derivative of a substituted delocalized PI -bonded group imparting a constrained geometry to the metal active site and containing up to 50 nonhydrogen atoms; M is a me ...


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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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Karjala Teresa, Yalvac Selim, Karjala Thomas, Vanderlende Daniel D, Kolthammer Brian W S, Stevens James C, Diehl Charles F: Liquid and gel-like low molecular weight ethylene polymers. Dow Global Technologies, Karjala Teresa, Yalvac Selim, Karjala Thomas, Vanderlende Daniel D, Kolthammer Brian W S, Stevens James C, Diehl Charles F, SPENCER Lee, April 15, 2004: WO/2004/031250 (25 worldwide citation)

The subject invention pertains to homogeneous liquid low molecular weight ethylene/alpha-olefin polymers having a number average molecular weight (Mn) as determined by gel permeation chromatography, of less than 25, 000, a total crystallinity, as measured by DSC, of less than 10 %, and a pour point, ...


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Konze Wayde V, Stevens James C, Vanderlende Daniel D: High efficiency solution polymerization process. Dow Global Technologies, Konze Wayde V, Stevens James C, Vanderlende Daniel D, DELINE Douglas N, November 29, 2007: WO/2007/136495 (11 worldwide citation)

A catalyst composition comprising a zirconium complex of a polyvalent aryloxyether and an alumoxane, polymerization processes employing the same, especially the continuous, solution polymerization of ethylene and one or more C3-30 olefins or diolefins to prepare copolymers having reduced cocatalyst ...


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Lai Shih Yaw, Knight Georges W, Wilson John R, Stevens James C: Process for the preparation of ethylene polymers. Dow Chemical, March 3, 1999: EP0899278-A2 (10 worldwide citation)

The present invention relates to an ethylene homo- or interpolymer, comprised of ethylene and optionally one C3-C20 alpha -olefins characterized in that the polymer has 0.01 to 3 long chain branches per 1000 carbons.


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