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Class 526/943 - POLYMERIZATION WITH METALLOCENE CATALYSTS


Subclass of Class 526 - Synthetic resins or natural rubbers -- part of the class 520 series
Definition: Process of polymerization in the presence of metallocene
No. of patents: 1692
Last issue date: 10/21/2008


1                      
NumberTitleIssue Date
7439312Branched 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 preparing a branched crystalline polypropylene composition that includes co...
10/21/2008
7439378Fulvene, 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 from an unsaturated ketone having a substituted group in the β-posi...
10/21/2008
7432336Catalysts for propylene copolymers
The present invention relates to propylene based copolymers and to processes for producing propylene based copolymers, particularly propylene-ethylene copolymers. These unique copolymers are prepared using metallocene catalysts. ...
10/07/2008
7420023Process for producing modified butene-1 polymer and modified butene-1 polymer obtained by the process
The present invention relates to a process for producing a buten-1-based polymer satisfying the following requirements (a), (b) and (c): (a) a crystalline resin having a melting point (Tm-D) of 0 to 100° C., the melting point being defined as a top of a peak observ...
09/02/2008
7417097Organometal compound catalyst
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 polymerizing at least one monomer to produce a polymer, wherein said cata...
08/26/2008
7405261Organometallic transition metal compound, biscyclopentadienyl ligand system, catalyst system and process for preparing polyolefins
The present invention relates to compounds of the formula (I): where M1 is an element of group 3, 4, 5 or 6 of the Periodic Table, X are halogen, hydrogen, C
07/29/2008
7402638Propylene 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 copolymer: [1] the concentration (P...
07/22/2008
7393965Crosslinked 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 and α-olefins. The bridged metallocene compound contains specific s...
07/01/2008
7390860Method 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 directing the flow of metallocene towards a junction, directing the flow of p...
06/24/2008
7390764Organometal 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 polymerizing at least one monomer to produce a polymer, wherein said catal...
06/24/2008
7390862Process 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 CH2═CHT wherein T is a C3-C10 alkyl group, in the presence of a catalyst system obtainable by contacting a m...
06/24/2008
7385015Trialkylaluminum 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 carbon atoms; then 2) calcining the combination of the support and th...
06/10/2008
7381783Polymerization 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 and to the catalyst compound in combination with an activator. The inv...
06/03/2008
7381679Catalyst 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. ...
06/03/2008
7378476Olefin 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 suitable radical-generating compound in an amount sufficient for poly...
05/27/2008
7378472Injection moulding polymer
The use of a multimodal polyethylene composition comprising as comonomers to ethylene at least two C4-12 alpha olefins in injection molding. ...
05/27/2008
7378481Hot 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. ...
05/27/2008
7368411Supported 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 which are substituted vinyl compounds, specifically alpha olefins, partic...
05/06/2008
7358381Racemoselective 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 heating the reaction mixture obtained in this way to a temperature i...
04/15/2008
7358410Processes 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 system. In one embodiment, the process includes providing a propylene-...
04/15/2008
RE40234Process 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 poly-α-olefins. ...
04/08/2008
7345129Polymerisation 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], Ru[II], Ru[III] or Ru[IV]; X represents an atom or group covalently or ioni...
03/18/2008
7342078Transition 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 comprising specifically selected metallocenes, in particular ones which ...
03/11/2008
7341971Production 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 catalyst particles, comprising forming a liquid/liquid emulsion system...
03/11/2008
7335711Preparation 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, C3+ alpha olefins and substituted vinyl compounds, such as styrene ...
02/26/2008
RE40121Transition metal compound
The present invention relates to zwitterionic neutral transition metal compounds. The compounds are suitable as catalyst components for the polymerization of olefins. ...
02/26/2008
7332456Alpha 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 are useful in the present invention are chiral, stereorigid metalloce...
02/19/2008
7326756High 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 preparing branched crystalline polypropylene composition that comprises con...
02/05/2008
7323526Supported 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 0.1 to 50 μm and calcined at a temperature greater than 600° C., and ...
01/29/2008
7320950Propylene 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 calorimetry (DSC), or a melting temperature (Tm) satisfying, if measurabl...
01/22/2008
7319125Supercritical 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 volume % of one or more solvents and from 0 to 30 mole % of one or more c...
01/15/2008
7312283Polymerization 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 catalysts to produce polyolefins are also provided. The compositions...
12/25/2007
7309678Polyamide 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 produce syndiotactic polypropylene or isotactic polypropylene. The support...
12/18/2007
7309748Group III bridged ionic metallocene based on cyclopentadienyl-fluorenyl ligands
The present invention discloses a metallocene catalyst component of the formula (I) [(Flu-R″-Cp)2M]−[Li(ether)4]+, wherein Cp is a cyclopentadienyl, substituted or unsubstituted, Flu is a fluorenyl, substituted or unsu...
12/18/2007
7309747Highly 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 polymer. (1) The intrinsic viscosity [η] as measured in tetralin solv...
12/18/2007
7307130Polymerization 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 the use of the catalyst composition in the polymerization of olefin(...
12/11/2007
7294600Supported 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 preparing the same, and a method for preparing polyolefin using the sam...
11/13/2007
7294599Acidic 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 composition. In one aspect, this invention encompasses precontacting a metall...
11/13/2007
7294681Mutliple 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. ...
11/13/2007
7285513Preparation 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 least two different organo metallic compound...
10/23/2007
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