Patent application number | Description | Published |
20090005525 | Catalyst Composition Comprising Group 4 Transition Metal Complexes and Method for Preparing Polyolefins Using the Same - The present invention relates to a catalyst composition comprising a novel structure of a Group 4 transition metal compound, to a method for preparing the same, and to a method for preparing a polyolefin using the catalyst composition. The method for preparing a polyolefin according to the present invention can be used for preparing a polyolefin having a high molecular weight and high copolymerizability with a high activity even at a high polymerization temperature and for preparing a polyolefin having a double composition distribution. | 01-01-2009 |
20090030221 | Transition Metal Complexes and Preparation Methods Thereof - The present invention provides a novel mononuclear transition metal compound, a novel binuclear transition metal compound, a novel organic amine or phosphorous compound, and a method for preparing the same. The mononuclear transition metal compound according to the present invention is configured such that a cyclopentadienyl group and an amido or phosphorous group are bridged via a phenylene bridge. The binuclear transition metal compound according to the present invention is configured such that the two bridged mononuclear transition metal compounds configured such that a cyclopentadienyl group and an amido or phosphorous group are bridged via a phenylene bridge are linked via a bridging group located at the phenylene bridge. According to the present invention, the mononuclear transition metal compound, the binuclear transition metal compound, the organic amine or phosphorous compound can be prepared in a simple manner by using suzuki-coupling reaction with a high yield. | 01-29-2009 |
20090286943 | Process For Preparation Of Olefin Polymers - The present invention relates to a preparation method of olefin polymers using a catalyst composition containing a transition metal compound. In detail, the present invention provides a preparation method of olefin polymer using a catalyst composition comprising a transition metal compound, wherein the preparation method comprises introducing a scavenger to a continuous solution polymerization reactor in a specific range of amount to give the olefin polymer with good productivity. | 11-19-2009 |
20100062927 | METHOD FOR PREPARING TRANSITION METAL COMPLEXES, TRANSITION METAL COMPLEXES PREPARE USING THE METHOD, CATALYTS COMPOSITION CONTAINING THE COMPLEXES - The present invention provides a novel transition metal complex where a monocy-clopentadienyl ligand to which an amido group is introduced is coordinated, a method for synthesizing the complex, and olefin polymerization using the same. The method for preparing a transition metal complex according to the present invention comprises a step of blocking a by-reaction of a nitrogen atom using a compound containing a protecting group, and thus it is possible to prepare a transition metal complex in a simpler manner in a high yield. Further, the transition metal complex according to the present invention has a pentagon ring structure having an amido group connected by a phenylene bridge in which a stable bond is formed in the vicinity of a metal site, and thus, sterically monomers can easily approach the transition metal complex. When a catalyst composition comprising the transition metal complex is applied in copoly-merization of ethylene and monomers having large steric hindrance, a very low density polyolefin copolymer having a density of less than 0.910 g/cc, in addition to a polyolefin having a high molecular weight and a linear low density, can be prepared. Furthermore, the reactivity is also very high. | 03-11-2010 |
20100093959 | SUPPORTED CATALYST FOR OLEFIN POLLYMERIZATION USING TRANSITION METAL COMPOUND HAVING THENYLENE-BRIDGE, METHOD FOR PREPARING THE SAME, AND METHOD FOR PREPARING POLYOLEFINGUSINGTHED SAME - The present invention provides a new supported catalyst for olefin polymerization prepared by reacting a novel transition metal compound on a cocatalyst-supported support, in which the transition metal compound is coordinated with a monocyclopentadienyl ligand to which an amido-quinoline group is introduced, a method for preparing the same, and a method for preparing a polyolefin using the same. The transition metal catalyst compound used in the present invention is configured such that an amido group is linked in a cyclic form via a phenylene bridge. Thus, a pentagon ring structure of the transition metal compound is stably maintained, so that monomers easily approach the transition metal compound and the reactivity is also high. Accordingly, if the supported catalyst for olefin polymerization prepared according to the present invention is applied to the copolymerization of ethylene and monomers having large steric hindrance in a slurry or a gas phase process, a linear, a linear, high molecular weight polyolefin having a very low density of 0.900 to 0.970 g/cc or less can be obtained. | 04-15-2010 |
20100113721 | NOVEL FOURTH GROUP TRANSITION METAL COMPOUND HAVING CYCLOPENTADIENYL LIGAND, METHOD OF PREPARING COMPOUND, AND METHOD OF PREPARING OLEFIN POLYMER USING COMPOUND - The present invention relates to a novel cyclopentadienyl compound, a fourth group transition metal compound having the cyclopentadienyl compound, a method of preparing the fourth group transition metal compound, a method of preparing an olefin polymer by using the fourth group transition metal compound, and an olefin polymer prepared by using the method. | 05-06-2010 |
20100179291 | LONG CHAIN-BRANCHED ETHYLENE-ALPHA OLEFIN COPOLYMER - The present invention relates to an ethylene-alpha olefin copolymer comprising long chain branches (LCB), while having a narrow molecular weight distribution. The ethylene-alpha olefin copolymer can be prepared by a continuous solution polymerization process using an activated catalyst composition containing a Group 4 transition metal compound having a monocyclopentadienyl ligand, to which a quinoline amino group is introduced. | 07-15-2010 |
20110172451 | METHOD FOR PREPARING TRANSITION METAL COMPLEXES, TRANSITION METAL COMPLEXES PREPARED USING THE METOD, CATALYST COMPOSITION CONTAINING THE COMPLEXES - The present invention provides a novel transition metal complex where a monocyclopentadienyl ligand to which an amido group is introduced is coordinated, a method for synthesizing the complex, and olefin polymerization using the same. The method for preparing a transition metal complex according to the present invention comprises a step of blocking a by-reaction of a nitrogen atom using a compound containing a protecting group, and thus it is possible to prepare a transition metal complex in a simpler manner in a high yield. Further, the transition metal complex according to the present invention has a pentagon ring structure having an amido group connected by a phenylene bridge in which a stable bond is formed in the vicinity of a metal site, and thus, sterically monomers can easily approach the transition metal complex. | 07-14-2011 |
20110177935 | METHOD FOR PREPARING TRANSITION METAL COMPLEXES, TRANSITION METAL COMPLEXES PREPARED USING THE METHOD, CATALYST COMPOSITION CONTAINING THE COMPLEXES - The present invention provides a novel transition metal complex where a monocy-clopentadienyl ligand to which an amido group is introduced is coordinated, a method for synthesizing the complex, and olefin polymerization using the same. The method for preparing a transition metal complex according to the present invention comprises a step of blocking a by-reaction of a nitrogen atom using a compound containing a protecting group, and thus it is possible to prepare a transition metal complex in a simpler manner in a high yield. Further, the transition metal complex according to the present invention has a pentagon ring structure having an amido group connected by a phenylene bridge in which a stable bond is formed in the vicinity of a metal site, and thus, sterically monomers can easily approach the transition metal complex. | 07-21-2011 |
20130317186 | LONG CHAIN-BRANCHED ETHYLENE-ALPHA OLEFIN COPOLYMER - The present invention relates to an ethylene-alpha olefin copolymer comprising long chain branches (LCB), while having a narrow molecular weight distribution. The ethylene-alpha olefin copolymer can be prepared by a continuous solution polymerization process using an activated catalyst composition containing a Group 4 transition metal compound having a monocyclopentadienyl ligand, to which a quinoline amino group is introduced. | 11-28-2013 |
20130317187 | LONG CHAIN-BRANCHED ETHYLENE-ALPHA OLEFIN COPOLYMER - The present invention relates to an ethylene-alpha olefin copolymer comprising long chain branches (LCB), while having a narrow molecular weight distribution. The ethylene-alpha olefin copolymer can be prepared by a continuous solution polymerization process using an activated catalyst composition containing a Group 4 transition metal compound having a monocyclopentadienyl ligand, to which a quinoline amino group is introduced. | 11-28-2013 |
Patent application number | Description | Published |
20100109693 | Auto probe device and method of testing liquid crystal panel using the same - An auto probe device used in a method of testing a plurality of signal lines of a liquid crystal panel is disclosed. | 05-06-2010 |
20100136637 | RECOMBINANT MICROORGANISM HAVING A PRODUCING ABILITY OF POLYLACTATE OR ITS COPOLYMERS AND METHOD FOR PREPARING POLYACTATE OR ITS COPOLYMERS USING THE SAME - Provided are a recombinant microorganism capable of producing polylactate (PLA) or hydroxyalkanoate-lactate copolymers and a method of preparing PLA or hydroxyalkanoate-lactate copolymers using the same. The recombinant microorganism has both a gene encoding a propionyl-CoA transferase from | 06-03-2010 |
20110177569 | MUTANT OF PROPIONYL-COA TRANSFERASE FROM CLOSTRIDIUM PROPIONICUM AND PREPARING METHOD FOR PLA OR PLA COPOLYMER USING THE SAME - Provided is a mutant of propionyl-CoA transferase from | 07-21-2011 |
20130053527 | EYHLYLENE-OCTENE COPOLYMER HAVING UNIFORM COMONOMER DISTRIBUTION (AS AMENDED) - The present invention is to provide an ethylene-octene copolymer having a narrow molecular weight distribution and a uniform comonomer distribution. Compared with the conventional ethylene-octene copolymers, the ethylene-octene copolymer of the present invention can realize the lower density and the lower melting point as well as a uniform comonomer distribution. | 02-28-2013 |
20130072646 | NOVEL CATALYST COMPOSITION AND PROCESS FOR PREPARING OLEFIN POLYMER USING THE SAME - The present invention relates to a catalyst composition and a process for preparing an olefin polymer using the same. More specifically, the present invention relates to a novel catalyst composition comprising at least two types of catalysts and a process for preparing an olefin polymer having excellent heat resistance using the same. The present invention can provide an olefin polymer having excellent activity and high heat resistance, and also can control the values of density, heat resistance and melt index (MI) of the olefin polymer. | 03-21-2013 |
20130085246 | OLEFIN-BASED POLYMER AND PREPARATION METHOD THEREOF - The present invention relates to an olefin-based polymer which exhibits superior processability and superior adhesive properties and therefore is desirably applicable to a hot-melt adhesive (HMA) or the like, and a preparation method thereof. The olefin-based polymer has a molecular weight distribution (Mw/Mn, PDI) of 2˜3, and a density of 0.85 to 0.88 g/cm | 04-04-2013 |
20140030774 | MUTANT OF PROPIONYL-COA TRANSFERASE FROM CLOSTRIDIUM PROPIONICUM AND PREPARING METHOD FOR PLA OR PLA COPOLYMER USING THE SAME - Provided is a mutant of propionyl-CoA transferase from | 01-30-2014 |
20140371414 | METHOD FOR PRODUCING AN ELASTOMER USING A TRANSITION METAL CATALYST - The present invention relates to a method of producing an elastomer. Specifically, the method of producing an elastomer according to the present invention comprises a step of polymerizing ethylene, propylene, and optionally, a diene monomer in the presence of a catalyst composition containing a transition metal compound. The method of producing an elastomer according to the present invention makes it possible to prepare a high molecular weight, ethylene-propylene or ethylene-propylene-diene, elastic copolymer at a high temperature. | 12-18-2014 |
20150031098 | MUTANT OF PROPIONYL-COA TRANSFERASE FROM CLOSTRIDIUM PROPIONICUM AND PREPARING METHOD FOR PLA OR PLA COPOLYMER USING THE SAME - Provided is a mutant of propionyl-CoA transferase from | 01-29-2015 |
20150045526 | OLEFIN-BASED POLYMER AND PREPARATION METHOD THEREOF - The present invention relates to an olefin-based polymer which exhibits superior processability and superior adhesive properties and therefore is desirably applicable to a hot-melt adhesive (HMA) or the like, and a preparation method thereof. The olefin-based polymer has a molecular weight distribution (Mw/Mn, PDI) of 2˜3, and a density of 0.85 to 0.88 g/cm | 02-12-2015 |
20150092580 | TRAFFIC MEASURING PERIOD CONTROL SYSTEM FOR MEASURING ENERGY OF ROUTER AND METHOD THEREFOR - Disclosed are a traffic measuring period control system for measuring energy of a router and a method therefor. The traffic measuring period control system comprises: a state measurement unit for measuring a traffic road or energy consumption of the router, and a measuring period setting unit for setting the traffic measuring period on the basis of the measured traffic load value and the measured energy consumption value, and the state measurement unit can measure the traffic load of the router according to the set traffic measuring period. | 04-02-2015 |
Patent application number | Description | Published |
20100130646 | METHOD FOR MANUFACTURING EPOXY NANOCOMPOSITE MATERIAL CONTAINING VAPOR-GROWN CARBON NANOFIBERS AND ITS PRODUCTS THEREBY - Disclosed is a method for producing an epoxy nanocomposite material containing vapor-grown carbon nanofibers and an epoxy nanocomposite material produced thereby. The method comprises physically mixing 0.1-5.0 parts by weight of vapor-grown carbon nanofibers as reinforcing materials with 100 parts by weight of an epoxy matrix resin to disperse the carbon nanofibers in the epoxy matrix resin, adding a curing agent to the mixture, and curing the mixture. According to the disclosed method, the vapor-grown carbon nanofibers are physically mixed with an epoxy matrix resin without using any solvent. Thus, the vapor-grown carbon nanofibers are sufficiently dispersed in the epoxy matrix resin compared to the case of using a solvent. Therefore, it is possible to produce an epoxy nanocomposite material having excellent mechanical strength and low friction/wear properties at room temperature and excellent thermal properties even at high temperature. Also, the vapor-grown carbon nanofibers are cost-effective and, at the same time, used in an amount smaller than the amount of carbon nanotubes used to improve the physical properties of epoxy resin in the prior art, thus effectively reducing the production cost of the nanocomposite material. | 05-27-2010 |
20110256203 | POROUS CERAMIC SCAFFOLD HAVING AN ORGANIC/INORGANIC HYBRID COATING LAYER CONTAINING BIOACTIVE FACTOR AND METHOD THEREOF - A method for manufacturing a porous ceramic scaffold having an organic/inorganic hybrid composite coating layer containing a bioactive factor is disclosed. The method includes; forming a porous ceramic scaffold, mixing a silica xerogel and a physiologically active organic substance to prepare an organic/inorganic hybrid composite, adding a bioactive factor to the organic/inorganic hybrid composite, and filling the organic/inorganic composite containing the bioactive factor into a pore structure of the porous ceramic scaffold, thereby coating the porous ceramic scaffold. In accordance with the method, the porous ceramic scaffold may be uniformly coated with the organic/inorganic hybrid composite while maintaining an open pore structure, and stably discharge the bioactive factor over a long period of time. | 10-20-2011 |
20110281300 | PREPARATION METHOD OF RECOMBINANT PROTEIN BY USE OF A FUSION EXPRESSION PARTNER - The present invention relates to a preparation method using a fusion expression partner. The method includes preparing a polynucleotide encoding a fusion expression partner selected from the group consisting of SlyD (FKBR-type peptidyl prolyl cis-trans isomerase), Crr (glucose-specific phosphotransferase (PTS) enzyme IIA component), RpoS (RNA polymerase sigma factor), PotD (Spermidine/putrescine-binding periplasmic protein), and RpoA (RNA polymerase alpha subunit), and an expression vector linking a polyDNA fragment of a heterologous protein, preparing a transformant by introducing the expression vector into a host cell, inducing the expression of a recombinant protein by culturing a transformant, and obtaining the expression. In the preparation method of the recombinant protein, the heterologous protein may enhance the water-solubility and folding of the recombinant protein, overcome the limitations about the water-solubility and folding which the conventional fusion expression partners have, and be used widely in the production of pharmaceutical and industrial proteins. | 11-17-2011 |
Patent application number | Description | Published |
20090209712 | TRANSITION METAL COMPLEXES, CATALYST COMPOSITIONS CONTAINING THE SAME, AND OLEFIN POLYMERIZATION USING THE CATALYST COMPOSITIONS - Provided are a novel transition metal complex where a monocyclopentadienyl ligand to which an amido or alcoxy group is introduced is coordinated, a method of synthesizing the same, and olefin polymerization using the transition metal complex. Compared to a conventional transition metal complex having a silicon bridge and an oxido ligand, the transition metal complex has a phenylene bridge, so that a monomer easily approaches the transition metal complex in terms of structure and a pentagon ring structure of the transition metal complex is stably maintained. The catalyst composition including the transition metal complex is used to synthesize a polyolefin copolymer having a very low density less than 0.910 g/cc. | 08-20-2009 |
20110152529 | TRANSITION METAL COMPLEX, CATALYST COMPOSITION INCLUDING THE SAME AND OLEFIN POLYMER USING CATALYST COMPOSITION - Provided are a novel transition metal complex where a monocyclopentadienyl ligand to which an amido group is introduced is coordinated, a catalyst composition including the same, and an olefin polymer using the catalyst composition. The transition metal complex has a pentagon ring structure having an amido group connected by a phenylene bridge in which a stable bond is formed in the vicinity of a metal site, and thus, a sterically hindered monomer can easily approach the transition metal complex. By using a catalyst composition including the transition metal complex, a linear low density polyolefin copolymer having a high molecular weight and a very low density polyolefin copolymer having a density of 0.910 g/cc or less can be produced in a polymerization of monomers having large steric hindrance. Further, the reactivity for the olefin monomer having large steric hindrance is excellent. | 06-23-2011 |
20110160413 | TRANSITION METAL COMPLEX, CATALYST COMPOSITION INCLUDING THE SAME AND OLEFIN POLYMER USING CATALYST COMPOSITION - Provided are a novel transition metal complex where a monocyclopentadienyl ligand to which an amido group is introduced is coordinated, a catalyst composition including the same, and an olefin polymer using the catalyst composition. The transition metal complex has a pentagon ring structure having an amido group connected by a phenylene bridge in which a stable bond is formed in the vicinity of a metal site, and thus, a sterically hindered monomer can easily approach the transition metal complex. By using a catalyst composition including the transition metal complex, a linear low density polyolefin copolymer having a high molecular weight and a very low density polyolefin copolymer having a density of 0.910 g/cc or less can be produced in a polymerization of monomers having large steric hindrance. Further, the reactivity for the olefin monomer having large steric hindrance is excellent. | 06-30-2011 |