Patent application number | Description | Published |
20080227937 | Process for Producing Olefin Copolymerization Catalyst and Process for Producing Olefin Copolymer - A process for producing an olefin copolymerization catalyst, comprising the step of contacting, with one another, (A) a solid catalyst component containing a titanium atom, a magnesium atom and a halogen atom, (B) an organoaluminum compound and/or organoaluminumoxy compound, and (C) a nitrogen-containing aromatic heterocyclic compound, whose one or more carbon atoms adjacent to its nitrogen atom are linked to an electron-donating group, or a group containing an electron-donating group; and a process for producing an olefin copolymer using the an olefin copolymerization catalyst. | 09-18-2008 |
20090018012 | Process for Producing Olefin Copolymerization Catalyst and Process for Producing Olefin Copolymer - A process for producing an olefin copolymerization catalyst, comprising the step of contacting, with one another, (A) a solid catalyst component containing a titanium atom, a magnesium atom and a halogen atom, (B) an organoaluminum compound and/or organoaluminumoxy compound, and (C) a nitrogen-containing aromatic heterocyclic compound, whose one or more carbon atoms adjacent to its nitrogen atom are linked to an electron-withdrawing group, or a group containing an electron-withdrawing group; and a process for producing an olefin copolymer using the an olefin copolymerization catalyst. | 01-15-2009 |
20090171019 | METHOD FOR PRODUCING PROPYLENE-ETHYLENE BLOCK COPOLYMER - The method for producing a propylene-ethylene block copolymer in accordance with the present invention has: a first polymerization process which is performed using two or more polymerization tanks connected in series and in which a solid catalyst or a prepolymerized catalyst containing a solid catalyst, and propylene are continuously supplied to a first polymerization tank; and a second polymerization process in which propylene, ethylene, and polypropylene particles continuously extracted from the last polymerization tank of the first polymerization process are supplied to a polymerization tank to produce a propylene-ethylene block copolymer, wherein the average retention time of the polypropylene particles in each polymerization tank of the first polymerization process is 0.1 to 1.5 h and the sum total of average retention times of polypropylene particles in the polymerization tanks of the first polymerization process is 1.5 to 3.0 h. | 07-02-2009 |
20090171045 | PRODUCTION PROCESS OF OLEFIN POLYMERIZATION CATALYST COMPONENT, OF OLEFIN POLYMERIZATION CATALYST, AND OF OLEFIN POLYMER - A solid catalyst component for olefin polymerization, comprising titanium atoms, magnesium atoms, halogen atoms and hydrocarbyloxy groups, wherein the following filtrate contains titanium atoms in a concentration of 0.08 mg-Ti/ml-filtrate or lower, measured according to a method comprising the steps of (1) preparing a suspension of the solid catalyst component for olefin polymerization in heptane having a concentration of 0.1 g-solid catalyst component/ml-suspension, (2) heating the suspension at 70° C. for 30 minutes under stirring, (3) filtering the suspension, thereby obtaining a filtrate, and (4) measuring a concentration of titanium atoms contained in the filtrate; and a production process of the solid catalyst component. | 07-02-2009 |
20110034323 | Solid catalyst component for olefin polymerization - A solid catalyst component for olefin polymerization, comprising titanium atoms, magnesium atoms, halogen atoms and hydrocarbyloxy groups, wherein the following filtrate contains titanium atoms in a concentration of 0.08 mg-Ti/ml-filtrate or lower, measured according to a method comprising the steps of (1) preparing a suspension of the solid catalyst component for olefin polymerization in heptane having a concentration of 0.1 g-solid catalyst component/ml-suspension, (2) heating the suspension at 70° C. for 30 minutes under stirring, (3) filtering the suspension, thereby obtaining a filtrate, and (4) measuring a concentration of titanium atoms contained in the filtrate; and a production process of the solid catalyst component. | 02-10-2011 |
20110165419 | ULTRAHIGH MOLECULAR WEIGHT ETHYLENE-a-OLEFIN OLEFIN COPOLYMER POWDER - Provided is an ultrahigh molecular weight ethylene-α-olefin copolymer powder having an intrinsic viscosity of 5 dl/g or more, a DSC melting point of 122° C. or less, an apparent bulk density of 0.30 g/cm | 07-07-2011 |
20110275765 | PROCESS FOR PRODUCING ETHYLENE-PROPYLENE COPOLYMER - There are provided an ethylene-propylene copolymer having the following structural characteristics, and a polypropylene resin composition comprising the above copolymer and polypropylene having a melting temperature of 160° C. or higher:
| 11-10-2011 |
Patent application number | Description | Published |
20100036068 | HYDROGENATION CATALYST AND PROCESS FOR PRODUCING OLEFIN POLYMER - The purpose of the present invention is to provide a hydrogenation catalyst, which can produce an olefin polymer having a higher molecular weight, and a process for producing an olefin polymer so that an olefin polymer having a higher molecular weight can be produced, by controlling hydrogen concentration in a polymerization reaction system efficiently in polymerizing an olefin in the presence of hydrogen. There is provided a hydrogenation catalyst formed by contacting the undermentioned component (A), the undermentioned component (B), and the undermentioned component (C). There is further provided a process for producing an olefin polymer characterized by polymerizing an olefin in the presence of hydrogen, the undermentioned component (A), the undermentioned component (B), and the undermentioned component (D).
| 02-11-2010 |
20100036070 | PROCESS FOR PRODUCING OLEFIN POLYMER (1) - The purpose of the present invention is to provide a process for producing an olefin polymer, which can produce an olefin polymer having a higher molecular weight by lowering hydrogen concentration efficiently in polymerizing an olefin in the presence of hydrogen by use of a gas phase reaction vessel. There is provided a process for producing an olefin polymer comprising the steps of: using a gas phase reaction vessel; polymerizing an olefin by use of a catalyst for olefin polymerization in the presence of hydrogen; and adding a hydrogenation catalyst to a bed portion in the gas phase reaction vessel. | 02-11-2010 |
20100036076 | PROCESS FOR PRODUCING OLEFIN POLYMER (2) - The purpose of the present invention is provite a process for producing an olefin polymer, which can produce an olefin polymer having a higher molecular weight even in the presence of hydrogen and can obtain an olefin polymer having good powder characteristics by lowering hydrogen concentration efficiently in polymerizing an olefin in the presence of hydrogen by use of a gas phase reaction vessel. There is provided a process for producing an olefin polymer comprising the steps of: using a gas phase reaction vessel; polymerizing an olefin by use of a catalyst for olefin polymerization in the presence of hydrogen; adding a hydrogenation catalyst into the gas phase reaction vessel; and adding a polymerization activity depressant. | 02-11-2010 |