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7402638 Propylene polymer particle method of producing the same and use thereof  
The present invention relates to a propylene random copolymer which satisfies the following requirements [1] to [4], and to various useful molded products obtained by molding the propylene random...
7393965 Crosslinked metallocene compound for olefin polymerization and method of polymerizing olefin with the same  
The bridged metallocene compound or the olefin polymerization catalyst which comprises the compound, enables high polymerization activity in polymerizing one or more monomers selected from ethylene...
7390862 Process for polymerizing 1-butene  
A process for polymerizing 1-butene, optionally with up to 30% by mol of ethylene, propylene or an alpha olefin of formula CH 2 ═CHT wherein T is a C 3 -C 10 alkyl group, in the presence of a...
7390860 Method for transitioning between Ziegler-Natta and metallocene catalysts in a bulk loop reactor for the production of polypropylene  
Polymerization processes in a bulk loop reactor are described herein. In particular, a method of contacting a flow of metallocene with a flow of propylene is provided. This method includes...
7390764 Organometal catalyst compositions  
This invention provides catalyst compositions that are useful for polymerizing at least one monomer to produce a polymer This invention also provides catalyst compositions that are useful for...
7385015 Trialkylaluminum treated supports  
This invention relates to a process to prepare a trialkylaluminum treated support comprising: 1) combining a support with first trialkylaluminum compound(s), where the alkyl groups have at least 2...
7381783 Polymerization catalyst systems, their use, their products and articles thereof  
The present invention relates to a process for the polymerization of monomers utilizing a bulky ligand hafnium transition metal metallocene-type catalyst compound, to the catalyst compound itself...
7381679 Catalyst combination, isotactic polymers and also a method for producing linear isotactic polymers and the use thereof  
The present invention relates to a catalyst combination for producing linear isotactic polymers containing an asymmetrical metal complex and also an activator.
7378481 Hot Melt Adhesives  
A hot melt adhesive based on a functionalized metallocene polyethylene copolymer finds use in packaging applications where high heat resistance, as well as good cold tolerance, is required.
7378476 Olefin polymerization process in the presence of a radical generating system  
An olefin polymerization process comprises gas-phase polymerization of at least one olefin monomer in a reactor using a Ziegler-Natta or metallocene catalyst system in the presence of at least one...
7378472 Injection moulding polymer  
The use of a multimodal polyethylene composition comprising as comonomers to ethylene at least two C 4-12 alpha olefins in injection molding.
7368411 Supported metallocene catalysts and their use in producing stereospecific polymers  
Supported stereospecific catalysts and processes for the stereotactic propagation of a polymer chain derived from ethylenically unsaturated monomers which contain three or more carbon atoms or...
7358410 Processes for forming polypropylene from an oxygenate-contaminated monomer feedstock  
The present invention provides various processes for producing polypropylene from an oxygenate-contaminated propylene-containing feedstock, preferably derived from an oxygenate to olefin reaction...
7358381 Racemoselective preparation of bridged metallocene complexes having unsubstituted or 2-substituted indenyl ligands  
The invention relates to a process for preparing racemic metallocene complexes by reacting transition metal complexes with cyclopentadienyl derivatives of alkali metals or alkaline earth metals and...
RE40234 Process for producing crystalline poly-α-olefins with a monocyclopentadienyl transition metal catalyst system  
The invention is a catalytic process using a Group IV B transition metal component and an alumoxane component to polymerize α-olefins to produce high crystallinity and high molecular weight...
7345129 Polymerisation catalysts  
A catalyst for the polymerisation of 1-olefins is disclosed, which comprises (1) a compound of Formula B wherein M is Fe[II], Fe[III], Co[I], Co[II], Co[III], Mn[I], Mn[II], Mn[III], Mn[IV],...
7342078 Transition metal compound, ligand system, catalyst system and the use of the latter for polymerisation and copolymerisation of olefins  
A process for the polymerization of olefins, in particular a process for the copolymerization of propylene with further olefins, is carried out in the presence of highly active catalyst systems...
7341971 Production of olefin polymerization catalysts  
The invention provides a process for producing an olefin polymerization catalyst, comprising an organometallic compound of a transition metal or of an actinide or lanthanide, in the form of solid...
RE40121 Transition metal compound  
The present invention relates to zwitterionic neutral transition metal compounds. The compounds are suitable as catalyst components for the polymerization of olefins.
7335711 Preparation and use of tetrasubstituted fluorenyl catalysts for polymerization of olefins  
Catalyst compositions and processes for the polymerization of ethylenically unsaturated monomers to produce polymers, including copolymers or homopolymers. Such monomers include ethylene, C 3+ ...
7332456 Alpha olefin catalyst systems  
The present invention provides a method for varying the melting points and molecular weights of polyolefins by changing the structure of the catalyst used in the polymerization. The catalysts that...
7326756 High temperature bulk polymerization of branched crystalline polypropylene  
Branched crystalline polypropylene compositions and methods for the preparation of branched crystalline polypropylene compositions are provided. For example, described herein is a process of...
7323526 Supported metallocene-alkyl catalyst composition  
A supported catalyst composition having improved flow properties is disclosed comprising an alkylalumoxane, a metallocene-alkyl an inorganic oxide support having an average particle size of from...
7320950 Propylene polymer, and resin composition and molded product thereof  
The propylene polymer of the present invention satisfies (1) a 25° C. hexane soluble content (H25) of 0-80 wt %; and (2) either no melting temperature (Tm) measurable by differential scanning...
7319125 Supercritical polymerization process and polymers produced therefrom  
This invention relates to a process to produce propylene polymers comprising contacting a metallocene catalyst compound and an activator in a reaction medium comprising propylene, from 0 to 30...
7312283 Polymerization catalysts and process for producing bimodal polymers in a single reactor  
Catalyst compositions comprising a first metallocene compound, a second metallocene compound, an activator-support, and an organoaluminum compound are provided. Methods for preparing and using such...
7309748 Group III bridged ionic metallocene based on cyclopentadienyl-fluorenyl ligands  
The present invention discloses a metallocene catalyst component of the formula (I) [(Flu-R″-Cp) 2 M] − [Li(ether) 4 ] + , wherein Cp is a cyclopentadienyl, substituted or unsubstituted, Flu is...
7309747 Highly flowable 1-butene polymer and process for producing the same  
A 1-butene polymer satisfying the following (1), (2) and either (3) or (3′): a process for producing the polymer; a resin modifier comprising the polymer; and a hot-melt adhesive containing the...
7309678 Polyamide supported metallocene catalysts  
Supported stereospecific catalysts and processes for the stereotactic propagation of a polymer chain derived from ethylenically unsaturated monomers such as the polymerization of propylene to...
7307130 Polymerization reactor operability using static charge modifier agents  
The present invention relates to a catalyst composition and a method for making the catalyst composition of a polymerization catalyst and a static charge modifier. The invention is also directed to...
7294681 Mutliple catalyst system for olefin polymerization and polymers produced therefrom  
This invention relates to a polymer of one or more C3 to C40 olefins, optionally one or more diolefins, and less than 15 mole % of ethylene, and polymerization processes for producing the same.
7294600 Supported hybrid metallocene catalyst, method for preparing the same, and method for preparing polyolefin using the same  
The present invention relates to a supported metallocene catalyst used for preparing polyolefin whose physical properties and molecular weight distribution can be easily controlled, a method for...
7294599 Acidic activator-supports and catalysts for olefin polymerization  
This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, typically using a supported catalyst...
7285608 Metallocene ligands, metallocene compounds and metallocene catalysts, their synthesis and their use for the polymerization of olefins  
A catalyst system includes a metallocene compound having the formula R 9 L 1 L 2 M 1 R 1 R 2 wherein R 9 is a bridge between ligands L 1 and L 2 and M 1 is a metal of Group IVB of the...
7285513 Preparation of catalyst systems  
The present invention relates to a process for preparing a catalyst for olefin polymerization which is obtainable by bringing A) at least one organic transition metal compound, B) a mixture of at...
7279536 Polymer production at supercritical conditions  
Process to polymerize olefins comprising contacting, in a polymerization system, olefins having three or more carbon atoms with a catalyst compound, activator, optionally comonomer, and optionally...
7273913 Process for the preparation of ethylene copolymers  
A process is described for the preparation of ethylene copolymers having a wide molecular weight distribution, characterized in that it is carried out in the presence of meso- and...
7271277 Fulvene, metallocene catalysts and preparation method thereof, and preparation of polyolefines copolymer using the same  
The present invention relates to a novel fulvene compound and a preparation method thereof, and more particularly to a fulvene compound having substituted groups in the 2- and 5-positions, prepared...
7268194 Continuous slurry polymerization process and apparatus  
A process of converting a loop reactor into multiple loop reactors comprising starting with a loop reactor comprising at least 8 vertical legs, at least two non-vertical conversion runs, each...
7259216 Method for producing highly branched ethylene polymers  
A process for preparing highly branched ethylene polymers comprises polymerizing ethylene over a catalyst system comprising a compound of the formula Ia or Ib and an activator, where the...
7259215 Process for producing propylene/ethylene block copolymer and propylene/ethylene block copolymer  
A process for producing a propylene-ethylene block copolymer in a good morphology using a catalyst system comprising a metallocene catalyst (1) preparing high crystalline polypropylene, a...
7256247 Polymerization of polyethylene having high molecular weight  
The present invention includes a bimodal polyethylene polymerization process wherein metallocene catalyst to is used to adjust the hydrogen response of a Ziegler-Natta catalyst. The polymerization...
7250478 Silicon containing cyclopentadienyl ring for metallocene catalyst components  
The present invention refers to a metallocene catalyst component for producing polyolefins according to formula (I) R″ s (CpR n ) g (CpR n ) M Q 3-g (I) or according to formula (II) R″(CpR n...
7244795 Polymerization process using metallocene catalyst systems  
The present invention relates to a polymerization process using improved metallocene catalyst systems. Specifically, the catalyst systems of the present invention relate to a metallocene compound...
7241903 Metallocenes, use in catalyst system for producing olefin polymers  
A metallocene compound of formula (I): wherein M is zirconium, titanium and hafnium; X is a hydrogen atom, a halogen atom or a hydrocarbon radical; R 1 is a linear C 1 -C 20 -alkyl radical; R 2 ...
7241850 Polypropylene having improved clarity and articles prepared therefrom  
A polypropylene composition comprises an isotactic polypropylene homopolymer resin that is suitable to form an injected molded article exhibiting less than about 60% haze, as determined by ASTM...
7241849 Group III bridged metallocene based on cyclopentadienyl-fluorenyl ligands  
The present invention discloses a metallocene catalyst component of formula (Flu-R″-Cp)M(η 3 -C 3 R′ 5 )(ether) n (I) wherein Cp is a cyclopentadienyl, substituted or unsubstituted, Flu is a...
7238759 Isotactic propylene copolymers, their preparation and use  
Unique copolymers comprising propylene, ethylene and/or one or more unsaturated comonomers are characterized as having: at least one, preferably more than one, of the following properties: (i) 13...
7232868 Methods of delivering catalyst systems for propylene polymerization  
A polymerization process is provided. For example, a polymerization process is described, including providing a catalyst slurry having a metallocene catalyst and a first oil, providing a transport...
7230056 Catalyst preparation method  
A two-step catalyst preparation method is disclosed. First, a support is combined with an indenoindolyl Group 3-10 metal complex and a first activator comprising an alkyl alumoxane to give a...
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