Quotables
"That’s an amazing invention, but who would ever want to use one of them?"
President Rutherford B. Hayes ; Said in 1876, after Alexander Graham Bell demonstrated the telephone to him at the White House
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7989383 | Self limiting catalyst composition 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 esters of aromatic dicarboxylic acid internal electron donors; one or more alum... | 08/02/2011 |
| 7935651 | Method for preparing a Ziegler-Natta catalyst A method for preparing a titanium-containing Ziegler-Natta catalyst is disclosed. A dialkyl magnesium compound, a trialkyl aluminum compound, and a polymethylhydrosiloxane are first combined in a hydrocarbon solvent. That product is then combined with dry, alcohol-f... | 05/03/2011 |
| 7893003 | Catalyst composition with mixed selectivity control agent and method The present disclosure provides a Ziegler-Natta catalyst composition comprising a procatalyst, a cocatalyst and a mixed external electron donor comprising a first selectivity control agent, a second selectivity control agent, and an activity limiting agent. A polyme... | 02/22/2011 |
| 7781363 | Self limiting catalyst composition 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 esters of aromatic dicarboxylic acid internal electron donors; one or more alum... | 08/24/2010 |
| 7718565 | Method for preparing solid catalysts for ethylene polymerization and copolymerization The present invention relates to a method for preparing a solid catalyst for ethylene polymerization and/or copolymerization. More specifically, the present invention relates to a solid titanium catalyst supported in a magnesium support which has an extremely high c... | 05/18/2010 |
| 7687426 | Catalyst composition with monocarboxylic acid ester internal donor 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... | 03/30/2010 |
| 7651969 | Catalyst system for producing ethylene (co) polymer with improved branch distribution A process for synthesizing a catalyst component for manufacturing ethylene polymer and co-polymer. The present invention provides a process for synthesizing catalyst component (A), comprising forming a complex by contacting the solid intermediate (B) with an aluminu... | 01/26/2010 |
| 7491670 | Self limiting catalyst composition 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 esters of aromatic dicarboxylic acid internal electron donors; one or more alum... | 02/17/2009 |
| 7420022 | 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... | 09/02/2008 |
| 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 |
| 7393806 | Catalyst composition with monocarboxylic acid ester internal donor 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... | 07/01/2008 |
| 7381779 | Self limiting catalyst composition with dicarboxylic acid ester internal donor 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 esters of aromatic dicarboxylic acid internal electron donors; one or more alum... | 06/03/2008 |
| 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 |
| 7326760 | Production of broad molecular weight polyethylene Broad molecular weight polyethylene and polyethylene having a bimodal molecular weight profile can be produced with chromium oxide based catalyst systems employing alkyl silanols. The systems may also contain various organoaluminum compounds. Catalyst activity and m... | 02/05/2008 |
| 7326757 | Supported catalyst for olefin polymerization Disclosed are catalyst systems and methods of making the catalyst systems for the polymerization of an olefin containing a solid titanium catalyst component containing an inorganic titanium compound, a magnesium alcohol adduct made from an inorganic magnesium compou... | 02/05/2008 |
| 7309756 | Methods for converting linear polyesters to macrocyclic oligoester compositions and macrocyclic oligoesters Macrocyclic oligoesters and compositions comprising macrocyclic oligoesters are prepared from intermediate molecular weight polyesters. In one embodiment, a diol is contacted with a dicarboxylic acid or a dicarboxylate in the presence of a catalyst to produce a comp... | 12/18/2007 |
| 7307036 | Highly active alpha-olefin polymerization catalyst A highly active alpha-olefin polymerization catalyst component is disclosed. In the presence of a co-catalyst, the catalyst component is useful for the production of LLDPE resins. The catalyst component is produced by a method whereby organic silicon compounds are r... | 12/11/2007 |
| 7294601 | Phosphines, transition metal complexes containing the same as the ligand, and process for production of optically active carboxylic acids [PROBLEMS] To provide a method by which desired optically active carboxylic acids may be prepared from a carboxylic acid having a carbon-carbon double bond through asymmetric hydrogenation with a catalyst consisting of a transition metal complex containing a water-s... | 11/13/2007 |
| 7271120 | Catalyst for the synthesis of dimethyl carbonate from urea and methanol, preparation and use thereof A catalyst for the preparation of dimethyl carbonate from urea and methanol having a composition on weight base of: active component of from 20 to 50 wt %, and carrier of from 80 to 50 wt %, and prepared by equal-volume spraying and impregnating method is disclosed.... | 09/18/2007 |
| 7256151 | Solid catalyst component for α-olefin polymerization, process for producing catalyst therefor, and process for producing α-olefin polymer A solid catalyst component for α-olefin polymerization, which comprises a titanium atom, a magnesium atom, a halogen atom, a phthalic acid ester compound, and a 1,3-diether compound, wherein an amount of the 1,3-diether compound contained in the solid catalyst comp... | 08/14/2007 |
| 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 production of α-olefin polymers or copolymers with high hydrogen response, ... | 07/03/2007 |
| 7230054 | Polymer resins with improved environmental stress crack resistance Resins comprising a relatively high-density, low-molecular-weight polyethylene component and a relatively low-density, high-molecular-weight ethylene copolymer component and methods of making the resins are disclosed. The rheological polydispersity of the high-densi... | 06/12/2007 |
| 7211535 | Enhanced polyolefin catalyst The present invention provides a novel process for preparing a catalyst useful in gas phase polymerization of olefins wherein the physical properties of the polymer and the productivity of the catalyst can be altered depending on the sequence of addition of the cata... | 05/01/2007 |
| 7208435 | Solid catalyst component for olefin polymerization and catalyst A solid catalyst component for polymerization of olefins prepared by contacting (a) a dialkoxy magnesium compound, (b) a tetra-valent titanium halide, and (c) an electron donor compound of the formula R1R2C(COOR3)2 suspend... | 04/24/2007 |
| 7202191 | 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... | 04/10/2007 |
| 7193022 | Method of polymerization and copolymerization of ethylene Disclosed is a method of polymerization and copolymerization of ethylene, which is carried out in the presence of (a) a solid titanium complex catalyst prepared by the steps of (i) preparing a magnesium solution by contacting halogenated magnesium compounds with alc... | 03/20/2007 |
| 7183234 | Multi-donor catalyst system for the polymerization of olefins The present invention provides catalyst systems including a Ziegler-Natta or Ziegler-Natta-type catalyst in combination with a mixture of certain electron donors. ... | 02/27/2007 |
| 7163905 | Polymerization catalyst system using di-sec-butyldimethoxysilane for preparation of polypropylene It has been discovered that using di-sec-butyldialkoxysilanes, such as di-sec-butyldimethoxysilane (DSBDMS), as external electron donors for Ziegler-Natta catalysts can provide a catalyst system that may prepare polypropylene films with improved properties and proce... | 01/16/2007 |
| 7153803 | High activity and good hydrogen response Ziegler-Natta polyethylene catalyst Disclosed are catalyst systems and methods of making the catalyst systems/supports for the polymerization of polyethylene containing a solid titanium catalyst component containing a titanium compound and a support made from a magnesium compound, an alkyl silicate, a... | 12/26/2006 |
| 7151071 | Method for preparation of a solid titanium catalyst for olefin polymerization The present invention relates to a method for preparing a solid titanium catalyst for olefin polymerization. The method for preparing a solid titanium catalyst for olefin polymerization according to the present invention comprises: preparing a magnesium compound sol... | 12/19/2006 |
| 7151145 | Process for narrowing short-chain branching distribution in two-step ethylene polymerizations and products An improved two-step polymerization process wherein ethylene homopolymer is produced in a first reactor and ethylene copolymer having narrowed short-chain branching distribution is prepared in a second reactor. Narrowed short-chain branching distribution of the copo... | 12/19/2006 |
| 7141634 | Catalyst for olefin polymerization and process for polymerizing olefins A catalyst for olefin polymerization comprising (A) a solid catalyst component which is prepared by causing (a) a magnesium compound, (b) a tetravalent titanium halide compound, and (c) an electron donor compound to come in contact with each other, (B) an organoalum... | 11/28/2006 |
| 7135531 | Spherical catalyst for olefin polymerization Disclosed are catalyst systems and methods of making the catalyst systems/supports for the polymerization of an olefin containing a solid titanium catalyst component having a substantially spherical shape and containing an internal electron donor, a support made fro... | 11/14/2006 |
| 7135532 | Process for producing solid catalyst component and catalyst for α-olefin polymerization, and process for producing α-olefin polymer There are disclosed a process for producing a solid catalyst component and a catalyst for α-olefin polymerization, and a process for producing an α-olefin polymer, wherein the process for producing a solid catalyst component comprises the steps of: ... | 11/14/2006 |
| 7122497 | Olefin polymerization catalyst system A catalyst system useful for polymerizing olefins is disclosed. The catalyst system comprises a cocatalyst and a supported transition metal prepared from a halogen-containing Group 4–6 transition metal compound and an organoaluminum-siloxane containing mixture. Th... | 10/17/2006 |
| 7119043 | Olefin polymerization processes and products thereof A novel loop/slurry olefin polymerization process is provided which produces ultra high molecular weight ethylene homopolymers and ultra high molecular weight ethylene copolymers. Catalyst systems used are selected from the group consisting of inorganic oxide suppor... | 10/10/2006 |
| 7109142 | Solid catalyst component and catalyst for olefin polymerization, and process for producing olefin polymer This invention concerns a solid catalyst component for olefin polymerization and the process for obtaining the catalyst component having titanium, halogen, magnesium, an organic acid ester and a relative surface area of 0.1–15 m2/g as measured according... | 09/19/2006 |
| 7109143 | Polymerization catalyst system using n-butymethyldimethoxysilane 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... | 09/19/2006 |
| 7098285 | Catalyst obtained by prepolymerization of polyolefin and olefin polymerization method using the same The present invention provides a prepolymerized olefin polymerization catalyst and olefin polymerization method using the same. More particularly, the present invention provides a prepolymerized catalyst that is encapsulated with macromonomers produced by polymerizi... | 08/29/2006 |
| 7078468 | Polymerization catalyst system using di-sec-butyldimethoxysilane for preparation of polypropylene It has been discovered that using di-sec-butyldialkoxysilanes, such as di-sec-butyldimethoxysilane (DSBDMS), as external electron donors for Ziegler-Natta catalysts can provide a catalyst system that may prepare polypropylene films with improved properties and proce... | 07/18/2006 |
