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| Number | Title | Issue Date |
| 8153745 | Multi-branched polypropylene Multi-branched polypropylene having a g′ of less than 1.00. ... | 04/10/2012 |
| 8133963 | Polypropylene composition for air quenched blown films The invention is directed to a polypropylene resin, which is suitable for manufacturing an air quenched blown film. The resin has a melt flow rate of greater than 5 g/10 min, less than 2% xylene solubles, a pentad isotacticity of greater than 95%, an isotactic penta... | 03/13/2012 |
| 8080624 | Propylene-based polymer, production method therefor, composition using the same, and application thereof A propylene-based polymer which is suitably applicable to foam molding, sheet molding, blow molding or the like, because of having good flow characteristics, high melt tension, high swell ratio and thus good molding workability. It is attained by a propylene-... | 12/20/2011 |
| 8030426 | Propylene polymers A polypropylene resin comprising a propylene polymer endowed with the following characteristics: a) distribution of molecular weight Mw/Mn lower than 4; b) the melt-viscosity measured at a temperature of 250° C. in the shear rate range between 1000 1/s and 40000 1/... | 10/04/2011 |
| 8017711 | Resin article and process for producing the same Provided is a resin article containing a propylene resin having a crystalline phase and a non-crystalline phase, wherein the propylene resin shows, in its scattering profile measured at a temperature of 155° C. to 165° C. by small-angle X-ray scattering method, a ... | 09/13/2011 |
| 8008417 | Polymeric material and its manufacture and use Disclosed herein is a polymer composition, its manufacture and use, said composition may comprise greater than about 90 mole % propylene monomer, and having a unique combination of properties, including one or more of the following: a heat of fusion of more than abo... | 08/30/2011 |
| 7956148 | Process for the preparation of polypropylene The present invention relates to a process for the preparation of polypropylene using a catalyst system of low porosity, the catalyst system comprising an asymmetric catalyst, wherein the catalyst system has a porosity of less than 1.40 ml/g. ... | 06/07/2011 |
| 7915367 | Process for the manufacture of branched polypropylene A process for manufacturing a branched polypropylene, said branched polypropylene having a branching index g′ of less than 1.00, the process comprising the step of polymerizing propylene and optionally one or more other comonomers under non-supercritical condition... | 03/29/2011 |
| 7872086 | Polymeric material and its manufacture and use Disclosed herein is a polymer composition, its manufacture and use, said composition may comprise greater than about 90 mole % propylene monomer, and having a unique combination of properties, including one or more of the following: a heat of fusion of more than abo... | 01/18/2011 |
| 7855263 | Process for producing thermoformed articles A process for obtaining thermoformed articles, comprising the following steps: a) forming a sheet comprising a propylene resin; b) thermoforming the sheet obtained in step a); wherein said propylene resin has the following characteristics: a) distribution of molecul... | 12/21/2010 |
| 7851578 | Succinate-containing polymerization catalyst system using n-butylmethyldimethoxysilane for preparation of polypropylene film grade resins It has been discovered that using n-butylmethyldimethoxysilane (BMDS) as an external electron donor for succinate-containing Ziegler-Natta catalysts can provide a catalyst system that may prepare polypropylene films with improved properties. The catalyst systems of ... | 12/14/2010 |
| 7807769 | Isotactic polypropylene produced from supercritical polymerization process This invention relates to an isotactic propylene homopolymer having: more than 15 and less than 100 regio defects (sum of 2,1-erythro and 2,1-threo insertions and 3,1-isomerizations) per 10,000 propylene units; an ... | 10/05/2010 |
| 7781553 | Polymerization catalyst system utilizing external donor systems and processes of forming polymers therewith External donor systems, catalyst systems and olefin polymerization processes are described herein. The external donor systems generally include a first external donor represented by the general formula SiR2m(OR3)4-m, where... | 08/24/2010 |
| 7691958 | Polypropylene and application of said polypropylene to electric material A polypropylene for an electric material has a melt flow rate of 0.1 to 30 g/10 min., a mesopentad fraction calculated from a 13C-NMR spectrum of 0.90 to 0.99, and a firing residue of 50 ppm by weight or less based on the polypropylene, a titanium content... | 04/06/2010 |
| 7662901 | High crystallinity, high melt flow rate polypropylene The present invention is directed to a high melt flow rate high crystallinity polypropylene homopolymer. The present invention likewise describes a bulk polymerization process using a Ziegler-Natta catalyst to produce the high melt flow rate high crystallinity polyp... | 02/16/2010 |
| 7659356 | Polypropylene type aqueous dispersion, polypropylene type composite aqueous emulsion composition and its use A polypropylene type aqueous dispersion comprising the following components (a) to (c): | 02/09/2010 |
| 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 modulus and is pliable, and is capable of providing a transparent mold... | 06/09/2009 |
| 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 crystalline thermoplastic resin having a crystallization temperature lower than... | 05/05/2009 |
| 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 the presence of heat, a polymer of isotactic polypropylene homopolym... | 04/14/2009 |
| 7470764 | Polymerization catalyst system using n-butylmethyldimethoxysilane for preparation of polypropylene film grade resins It has been discovered that using n-butylmethyldimethoxysilane (BMDS) as an external electron donor for Ziegler-Natta catalysts can provide a catalyst system that may prepare polypropylene films with improved properties. The catalyst systems of the invention provide... | 12/30/2008 |
| 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 donors and selected external donors. The high melt flow rate, high crystal... | 12/16/2008 |
| 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 preparing a branched crystalline polypropylene composition that includes co... | 10/21/2008 |
| 7429634 | Polymer production at supercritical conditions This invention relates to a 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 diluent or solvent, at a temperature abov... | 09/30/2008 |
| 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 of aromatic carboxylic acid internal electron donors; one or more al... | 09/02/2008 |
| 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 olefins. In particular, in propylene polymerization, catalyst systems compri... | 07/15/2008 |
| 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 an isotactic olefin polymer, and/or a catalyst component A′ capabl... | 07/08/2008 |
| 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 directing the flow of metallocene towards a junction, directing the flow of p... | 06/24/2008 |
| 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 from the propylene polymer composition. The propylene polymer composit... | 06/17/2008 |
| 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 150° C. ... | 06/03/2008 |
| 7365143 | 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 a rubber, 3 to 15% by weight of glass bubbles, and 0.5 to 7% by weig... | 04/29/2008 |
| 7365131 | Thermoplastic vulcanizate composition A thermoplastic vulcanizate composition comprised of (a) thermoplastic resin selected from the group consisting of polyphenylene ether, polypropylene, polyethylene, and polystyrene, (b) at least one elastomer selected from the group consisting of butadiene-isoprene ... | 04/29/2008 |
| 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 a rubber, 3 to 15% by weight of glass bubbles, and 0.5 to 7% by weig... | 04/29/2008 |
| 7361720 | Highly crystalline polypropylene with low xylene solubles The invention is directed to a polypropylene resin which has a Mw/Mn 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 less than 2 wt. % xylene solubles. ... | 04/22/2008 |
| 7354979 | Polymer production at supercritical conditions This invention relates to a 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 diluent or solvent, at a temperature abov... | 04/08/2008 |
| 7351478 | Heat-seal films and method of manufacture A heat-seal polymer film and method of forming such film is provided. The heat-seal film is formed from metallocene-catalyzed isotactic random copolymers of propylene and at least one other C2 to C8 alpha olefin, such as ethylene random. Such f... | 04/01/2008 |
| 7339018 | Diene-modified propylene copolymers Certain specific embodiments of the invention will now be discussed. For example, a process of preparing a copolymer composition that includes a diene-modified polypropylene copolymer is described, which process includes: contacting a metallocene catalyst compound w... | 03/04/2008 |
| 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, C3+ alpha olefins and substituted vinyl compounds, such as styrene ... | 02/26/2008 |
| 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 insoluble in xylene at 25° C.≧94, and including from 10 to 60% by weight of a f... | 02/19/2008 |
| 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 temperature are regulated for pre-polymerization of a catalyst and th... | 02/12/2008 |
| 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 preparing branched crystalline polypropylene composition that comprises con... | 02/05/2008 |
