Patent
Supported polymerization catalysts, their production and use
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TLDR
In this article, a supposed metallocene catalyst system was proposed for polymerizing olefins, and the method for supposing the catalyst of the invention provided for polymers having broader molecular weight distribution and a higher molecular weight.Abstract:
This invention is generally directed toward a supposed catalyst system useful for polymerizing olefins. The method for supposing the catalyst of the invention provides for a supposed metallocene catalyst able to produce polymers having broader molecular weight distribution and a higher molecular weight. Not only are such polymers easily processable as compared with metallocene polymers produced with other support methods but the methods of this invention provides for a supposed catalyst with increased activity.read more
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Patent
Catalyst compositions and polyolefins for extrusion coating applications
Michael D. Jensen,Max P. McDaniel,Joel L. Martin,Elizabeth A. Benham,Randy Muninger,Gary Jerdee,Ashish M. Sukhadia,Qing Yang,Matthew G. Thorn +8 more
TL;DR: In this article, the authors proposed a supported catalyst composition for the polymerization and copolymerization of olefins, including the contact product of a first metallocene compound and at least one chemically treated solid oxide.
Patent
High activity olefin polymerization catalyst and process
TL;DR: Group 4 metal complexes are useful as addition polymerization catalysts of the formula: (1) G 1 is a group containing from 1 to 40 atoms not counting hydrogen; (2) T is a divalent bridging group of from 10 to 30 atoms, selected from mono- or di- aryl- substituted methylene or silylene groups or mono-or di- heteroaryl-substituted methylene groups, wherein at least one such anonymy is substituted in one or both ortho- positions with a secondary or tertiary alkyl-
Patent
Temperature control of MW in olefin polymerization using supported metallocene catalyst
TL;DR: In gas phase polymerizations and copolymerizations of ethylene, temperature controls the molecular weight expressed as MI (wherein MI is measured according to ASTM D-1238 Condition E), of the resin product as discussed by the authors.
Patent
Olefin polymerization catalyst
TL;DR: In this paper, an olefin polymerization catalyst composition comprising the product of the combination of at least one activator and at least two different transition metal compounds each of which is represented by the formula: ((Z)XA t (YJ)) q MQ n (I) where M is a metal selected from Group 3 to 13 or lanthanide and actinide series of the Periodic Table of Elements.
Patent
Olefin polymerization catalyst system
Rex E. Murray,Simon Mawson +1 more
TL;DR: In this article, an olefin polymerization catalyst composition comprising the product of the combination of an activator, an additive and a transition metal compound is represented by the formula: ((Z)XA t (YJ)) q MQ n where M is a metal selected from the group consisting of Groups 3 to 13, lanthanide and actinide metals of the Periodic Table of Elements; Q is bonded to M and each Q is a monovalent, divalent or trivalent anion.
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Patent
Catalyst for polymerizing alpha-olefin and polymerization process
TL;DR: In this article, the authors proposed a catalyst for alpha-olefin copolymerization, which enables the production of a spherical polymer having good particle size distribution and excellent bulk density when employed in slurry polymerization process or gas phase polymerisation process.
Patent
Catalyst and method of broadening polymer molecular weight distribution and increasing polymer tensile impact strength and products made thereof
TL;DR: In this article, a method of producing polyolefins having broadened molecular weight distributions and enhanced tensile impact strengths utilizing a silica supported metallocene-alumoxane catalyst system was proposed.