Patent
Supported homogeneous catalyst complexes for olefin polymerization
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TLDR
In this paper, a supported catalyst complex having a Group 4 metal cyclopentadienyl derivative and an aluminoxane reacted with silica was proposed for producing homogeneous polymers and copolymers having a narrow molecular weight distribution.Abstract:
A supported catalyst complex having a Group 4 metal cyclopentadienyl derivative and an aluminoxane reacted with silica which show improved resistance to catalyst poisoning. The supported catalyst composition is particularly suitable for producing homogeneous ethylene polymers and copolymers having a narrow molecular weight distribution. The invention further includes the process of preparing the supported catalyst compositions and their use as olefin polymerization catalysts. The catalyst support is prepared by contacting silica with an aluminoxane, preferably either methylaluminoxane or modified methylaluminoxane.read more
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Lubricating oil compositions.
TL;DR: In this article, a lubricating oil composition formulated with a viscosity index (VI) improver composition including a combination of an ethylene α-olefin copolymer having no greater than 66 mass % of units derived from ethylene was presented.
Patent
Catalyst composition comprising shuttling agent for ethylene multi-block copolymer formation
Daniel J. Arriola,Edmund M. Carnahan,Yunwa Wilson Cheung,David D. Devore,David D Graf,Phillip D. Hustad,Roger L. Kuhlman,Colin Li Pi Shan,Benjamin C. Poon,Gordon R. Roof,James C. Stevens,Pamela J. Stirn,Timothy T. Wenzel +12 more
TL;DR: In this article, a multi-block copolymer is defined for use in forming a multinode copolym, containing two or more segments or blocks differing in chemical or physical properties, and a polymerization process using the same, and the resulting polymers, wherein the composition comprises the admixture or reaction product resulting from combining: (a) a first metal complex olefin polymerization catalyst, (b) a second metal complex OLEF polymerisation catalyst capable of preparing polymers differing from the polymer prepared by catalyst under equivalent polymerization conditions, and (
Patent
Polymerization catalyst systems, their production and use
TL;DR: In this article, a supported metallocene catalyst system that does not require an activator or cocatalyst for the polymerization of olefins was proposed, which is useful for polymerizing olefs.
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Polymerization catalyst systems, their production and use
TL;DR: In this paper, a supported metallocene catalyst and alumoxane activator were used for polymerizing olefins, which when utilized in a polymerization process substantially reduced the reactor fouling and sheeting.
Patent
Multiple catalyst system for olefin polymerization and polymers produced therefrom
Peijun Jiang,Armenag H. Dekmezian,Jo Ann M. Canich,Charles L. Sims,Ramin Abhari,Cesar A. Garcia-Franco,David R. Johnsrud +6 more
TL;DR: In this paper, a branching index (g') of 0.95 or less measured at the Mz of the polymer was defined, and the ratio of the first catalyst to the second catalyst is from 1:1 to 50:1, where at least 20% of the olefins are converted to polymer.
References
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Metal complex compounds, process for preparation and method of use
TL;DR: A monocyclopentadienyl or substituted cyclopentadiyl metal complex containing compound useful as an addition polymerization catalyst corresponds to the formula: CpMXn⁺A⁻ where n is 1 or 2 depending on the valence of M; n is a noncoordinating compatible anion of a Bronsted acid salt.
Patent
Supported monocyclopentadienyl transition metal olefin polymerization catalysts
TL;DR: A supported catalyst system comprises in inert support material, a Group IV B transition metal component and an alumoxane component; it may be employed to polymerize olefins to produce a high molecular weight polymer as mentioned in this paper.