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7619048 |
Method for producing propylene polymer using alkoxysilane compound containing trialkysilyl group in molecular structure
Disclosed is a method for producing a propylene polymer using an alkoxysilane compound comprising a trialkylsilyl group in its molecular structure, specifically a method for easily producing an...
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7615602 |
Process for producing polypropylene film
The invention relates to a process for producing a polypropylene film having a small dynamic coefficient of friction (CoF) and to a film obtained by this process. The invention further relates to...
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7598328 |
Supported catalysts for manufacture of polymers
A supported catalyst composition and process for preparing high molecular weight polymers of one or more addition polymerizable monomers, especially propylene, said composition comprising:
...
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7582716 |
Compositions of ethylene/α-olefin multi-block interpolymer for blown films with high hot tack
The present invention relates to film layers and compositions having improved hot tack properties. The compositions comprise at least one ethylene/α-olefin interpolymer, wherein the...
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7579417 |
Metallocene compounds
A metallocene compound of formula (I) wherein: M is an atom of a transition metal; X, same or different, is a hydrogen atom, a halogen atom, or a R, OR, OSO 2 CF 3 , OCOR, SR, NR 2 or PR 2 group,...
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7560523 |
Production of isotactic and regiorandom polypropylene based polymer and block copolymers
One step ortho-alkylation of anilines with styrenes to give chiral anilines is obtained using a strong acid catalyst, e.g. CF 3 SO 3 H. Condensation of the product to give ligand and metallation...
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7557171 |
Halogen substituted metallocene compounds for olefin polymerization
A metallocene compound comprising a transition metal, a first substituted or unsubstituted indenyl or fluorenyl ligand pi—bonded to the transition metal, a second monoanionic ligand bonded to the...
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7544758 |
Propylene polymer and composition containing the same, molded object and laminate comprising these, and processes for producing propylene polymer and composition containing the same
A propylenic polymer according to the present invention or a composition thereof have an excellent melt flowability and contains a less amount of stickiness-causing components, and also has a low...
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7544749 |
Polymerization catalysts, organic transition metal compounds, process for preparing polyolefins and polyolefins
A catalyst system obtained by reacting at least one chiral transition metal compound and at least one cocatalyst, where the chiral transition metal compound is a transition metal compound of...
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7538167 |
Syndiotactic polypropylene and methods of preparing same
A syndiotactic polypropylene comprising a melting temperature of greater than 160° C., a percentage of syndiotactic pentads greater than 95%, a toluene soluble fraction of equal to or less than...
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7531609 |
Process for the preparation of 1-butene/propylene copolymers
A solution polymerization process for obtaining isotactic, crystalline or crystallizable 1-butene/propylene polymers comprising contacting under polymerization conditions at a temperature ranging...
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7531607 |
Process for producing olefin polymers
A process for producing at least two different propylene polymer grades, in which process the isotacticity of the polymer is changed while keeping the melt flow rate of the polymer at a...
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7528206 |
Fiber-crystalline thermoplastic resin composite material and pellet thereof
Disclosed is a composite material comprising: resin (I) comprising 10 to 99% by weight of a crystalline thermoplastic resin which is defined as component (A), and 1 to 90% by weight of a...
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7524910 |
Polyolefin adhesive compositions and articles made therefrom
Embodiments of the present invention relate to article comprising a polymer comprising one or more C3 to C40 olefins, optionally one or more diolefins, and less than 5 mole % of ethylene having a...
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7521512 |
Catalyst composition and polymerization process using mixture of silane electron donors
A catalyst composition for the polymerization of olefins comprising the combination of one or more Ziegler-Natta procatalysts comprising one or more transition metal compounds; one or more aluminum...
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7517942 |
Method to make reversibly cross-linked isotactic polypropylene
A method for preparing reversibly cross-linked isotactic polypropylene having a degree of crystallinity substantially identical to a degree of crystallinity of a starting polypropylene by mixing in...
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7514510 |
Fluorenyl catalyst compositions and olefin polymerization process
An olefin polymerization process comprising contacting one or more olefins and a catalyst component in a reaction zone under suitable reaction conditions to form a polyolefin, wherein the catalyst...
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7514509 |
Catalyst compositions and methods of forming isotactic polyproyplene
Olefin polymerization processes are described herein. In one embodiment, the process generally includes introducing propylene monomer to a reaction zone, disposing an isospecific metallocene...
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7470759 |
Isotactic-atactic polypropylene and methods of making same
A method of producing a polymer comprising contacting in a reaction zone under conditions suitable for polymerization of an alpha-olefin monomer with a metallocene catalyst having at least three...
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7465776 |
High crystallinity, high melt flow rate polypropylene
High melt flow rate high crystallinity polypropylene homopolymer are produced in a bulk polymerization process using a Ziegler-Natta catalyst containing a combination of two internal electron...
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7452947 |
Silica-supported polymerization catalyst
A process for the preparation of a silicon containing transition metal compound that includes the steps of (a) non-hydrolytic sol-gel condensation of a silane of formula L x SiQ n wherein L is a...
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7449528 |
Supported catalyst containing active titanium in the homo, co-, and ter-polymerization of olefin-unsaturated compounds
The present invention relates to a supported catalyst containing titanium, its preparation and it use in the homo-, co-, and ter-polymerization of olefin-unsaturated compounds. The present...
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7439312 |
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...
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7420021 |
Self-extinguishing catalyst composition with monocarboxylic acid ester internal door and propylene polymerization process
A catalyst composition for the polymerization of propylene comprising one or more Ziegler-Natta procatalyst compositions comprising one or more transition metal compounds and one or more monoesters...
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7399812 |
Silicon ether compounds and a method for the preparation thereof
The present invention relates to silicon ether compounds having a general formula (I), a method for the preparation thereof and use thereof as a component of catalysts for polymerization of...
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7396888 |
Catalyst system comprising a mixture of catalyst components for producing a polyolefin blend
Provided is a catalyst system for producing a polyolefin blend, which catalyst system comprises a mixture including the following catalyst components: i) a catalyst component A capable of producing...
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7388051 |
Propylene polymer composition and use thereof
The invention provides a propylene polymer composition well balanced and excellent in transparency, flexibility, heat resistance, scratch resistance and rubber elasticity, and a medical tube made...
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7381778 |
Method of preparing a treated support
This invention relates to a method of preparing a supported catalyst comprising the steps of contacting a solid titanium with a supported catalyst compound, and heating the combination to at least...
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7365144 |
Polypropylene composite composition
Disclosed herein is a polypropylene composite composition. The polypropylene composite composition comprises 50 to 80% by weight of polypropylene, 6 to 30% by weight of talc, 10 to 30% by weight of...
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7361720 |
Highly crystalline polypropylene with low xylene solubles
The invention is directed to a polypropylene resin which has a M w /M n of less than 5, a melt flow rate of less than 7 g/10 min., a 1% secant flexural modulus of greater 5 than 300,000 psi and...
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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+ ...
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7332556 |
Crystalline polymers of propylene having improved processability in the molten state and process for their preparation
Crystalline polymers and copolymers of propylene having total MIL values>2 g/10 minutes, total [η] values in tetrahydronaphthalene at 135° C.≦2.8 dl/g, mW/MN values>20, a fraction...
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7329714 |
Method of polymerizing propylene comprising olefin pre-polymerization step
The present invention relates to a method of polymerizing olefin containing the step of pre-polymerization. More precisely, according to the method of the present invention, the reaction speed and...
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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...
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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...
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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...
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7300994 |
Isotactic polypropylene containing polymers
Isotactic polypropylene homopolymers or segments of low polydispersity are prepared using phenoxyketimine catalysts containing N-pentafluorophenyl groups.
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7288598 |
Polyolefin masterbatch for preparing impact-resistant polyolefin articles
A masterbatch composition comprising (1) 10-50 wt % of a crystalline propylene homopolymer and (2) 50-90 wt % of a blend consisting of (a) a copolymer of ethylene and one or more C4-CIO...
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7282544 |
Olefin polymerisation process in the presence of an anti-fouling agent
A propylene polymerisation process carried out in the presence of an anti-fouling agent; characterised in that the anti-fouling agent comprises an anti-fouling polymer containing:
(1) one or...
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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...
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7250211 |
Polypropylene films and multilayered laminate
Heat-sealing polypropylene films having specific characteristics, and being well-balanced between a tensile modulus and a heat seal temperature, less tacky, and excellent in processability,...
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7244794 |
Method for producing propylene polymer having a very high melt-flowability
The present invention relates to a method for producing a propylene polymer having a very high melt flowability, specifically to a method for producing an isotactic propylene polymer having a...
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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 ...
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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...
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7238818 |
Heterocyclic metallocenes and polymerization catalysts
A new class of heterocyclic metallocenes, a catalytic system containing them and a process for polymerizing addition polymerizable monomers using said catalytic system are disclosed; the...
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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...
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7238758 |
Catalysts for polymerization or copolymerization of α-olefins, catalyst components thereof, and processes for polymerization of α-olefins with the catalysts
The invention has an object to provide a catalyst for polymerizing or copolymerizing an α-olefin, catalyst constituent thereof, and method of polymerizing α-olefins with the catalyst, for...
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7235618 |
Polypropylene polymers
Embodiments of the present invention include a polypropylene homopolymer synthesized from a metallocene catalyst system and methods of forming the homopolymer, the homopolymer having an aluminum...
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7235614 |
Methods for injecting catalyst into a polymerization reactor
A polymerization process and a catalyst delivery system are provided. For example, a polymerization process is described, including providing a conduit having a catalyst inlet, a first propylene...
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7230128 |
Organometallic fluorenyl compounds, preparations, and use
Fluorenyl-containing metallocenes are disclosed along with methods for making the metallocenes. Also disclosed are methods for using the metallocenes as polymerization catalysts. In addition,...
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