JAPAN POLYPROPYLENE CORPORATION Patent applications |
Patent application number | Title | Published |
20160137831 | PROPYLENE-BASED BLOCK COPOLYMER - An object of the present invention is to prevent an occurrence of flow-mark molding defects to improve an appearance of molded articles, and as a means for achieving the object, a propylene-based block copolymer is used as an appearance improver, the copolymer comprising 80 to 60% by weight of crystalline propylene polymer portion which has an intrinsic viscosity [η]p of 0.90 dL/g or less and 20 to 40% by weight of propylene/ethylene random copolymer portion which has an ethylene content of 35 to 50% by weight and an intrinsic viscosity [η]c of 7.0 dL/g or higher ([η]c/[η]p being 7.5 to 30), in which the propylene-based block copolymer has a MFR of 10 to 50 g/10 min. | 05-19-2016 |
20160046842 | POLAR-GROUP-CONTAINING OLEFIN COPOLYMER, POLAR-GROUP-CONTAINING MULTINARY OLEFIN COPOLYMER, OLEFIN-BASED RESIN COMPOSITION, AND ADHESIVE AND LAYERED PRODUCT EACH USING THE SAME - A polar-group-containing olefin copolymer which comprises 99.999 to 80 mol % of structural units derived from at least one of ethylene and α-olefin having 3 to 20 carbon atoms and 20 to 0.001 mol % of structural units derived from at least one polar-group-containing monomer which contains an epoxy group and is represented by the structural formula (I) or structural formula (II), the polar-group-containing olefin copolymer being a random copolymer obtained by copolymerization in the presence of a transition metal catalyst and having a linear molecular structure. | 02-18-2016 |
20150322250 | PROPYLENE-ETHYLENE COPOLYMER RESIN COMPOSITION AND MOULDED ARTICLE, FILM AND SHEET THEREOF - A propylene-ethylene copolymer resin composition including: 97 to 65 parts by weight of a propylene polymer (A) produced with a metallocene catalyst and 3 to 35 parts by weight of a propylene-ethylene copolymer (B). The copolymer (B) includes: 65 to 95% by weight of a propylene polymer component (B1) and 5 to 35% by weight of a propylene-ethylene copolymer component (B2). | 11-12-2015 |
20150315365 | FIBER-REINFORCED POLYPROPYLENE RESIN COMPOSITION AND MOLDED ARTICLE OF SAME - Provided are a fiber-reinforced polypropylene resin composition, and a molded article prepared therefrom having good grain transfer characteristics, a good appearance, a soft surface texture, high rigidity, and high heat resistance. | 11-05-2015 |
20150266914 | METALLOCENE COMPLEX AND OLEFIN POLYMERIZATION METHOD - Provided are a metallocene complex that facilitates copolymerization of olefin monomers including propylene at a higher uptake rate of comonomers, i.e., ethylene and α-olefin, manufacture of a rubber component having a higher molecular weight, and manufacture of homopolypropylene having a higher melting point through homopolymerization of propylene, compared to traditional metallocene catalysts, and a method of olefin polymerization in the presence of such a metallocene complex. Also provided are, for example, a metallocene complex represented by general formula [I] (e.g., a metallocene complex having a substituent at position 6 of one or each indenyl ring and an optionally substituted furyl or thienyl group at position 2 of one or each indenyl ring), an olefin polymerization catalyst containing the metallocene complex, and a method of olefin polymerization involving olefin polymerization or copolymerization in the presence of the olefin polymerization catalyst. | 09-24-2015 |
20150044405 | POLYPROPYLENE RESIN COMPOSITION AND EXPANDED MOLDING - A polypropylene-based resin composition is provided that can provide a foam molding that exhibits an excellent closed cell characteristic and excellent extrusion characteristics, that is light weight and has a rigid feel, and that has an excellent recyclability. | 02-12-2015 |
20150010747 | POLYPROPYLENE-BASED RESIN COMPOSITION AND FOAM SHEET - Provided is a polypropylene-based resin composition which gives uniform and fine cells and from which a foamed sheet and thermoform excellent in appearance, thermoformability, impact resistance, lightness, stiffness, heat resistance, heat insulating properties, oil resistance and the like can be produced. A polypropylene-based resin composition comprising (X) 5 to 99% by weight of a polypropylene resin having a structure with long chain branches, and (Y) 1 to 95% by weight of a propylene-based block copolymer produced by sequential polymerization, which block copolymer comprises (Y-1) a propylene (co)polymer and (Y-2) a propylene-ethylene copolymer, said resin (X) having properties (X-i) to (X-iv) and said block copolymer (Y) having properties (Y-i) to (Y-v), and the like. | 01-08-2015 |
20140309350 | THERMOPLASTIC RESIN COMPOSITION AND TOILET COMPONENTS MADE THEREFROM - Provided is a thermoplastic resin composition that is free of discoloration defects, is resistant to the staining and deterioration caused by urine, fecal matter, detergents and so forth, exhibits an excellent tactile sensation, and also exhibits an excellent marring resistance and that is thus well suited for toilet components. Toilet components comprising this thermoplastic resin composition are also provided. | 10-16-2014 |
20140242335 | FIBER-REINFORCED POLYPROPYLENE RESIN COMPOSITION AND MOLDED ARTICLE THEREOF - The present invention is to provide a fiber reinforced polypropylene resin composition which has low shrinkage, excellent grain transferability, flaw resistance and moulded appearance, can provide a moulded article having a smooth and soft tactile sensation on the surface thereof without foaming and has high rigidity, high impact strength and high heat resistance, as well as a method for producing the same and a moulded article thereof. These are implemented by a fiber reinforced polypropylene resin composition containing a propylene-ethylene block copolymer which satisfies four requirements such as sequential polymerization with a metallocene catalyst, a specific fiber and optionally a specific modified polyolefin, a thermoplastic elastomer which satisfies two requirements such as MFR, a specific propylene polymer resin and a specific fatty acid amide. | 08-28-2014 |
20130177721 | PROPYLENE RESIN SHEET AND HEAT PROCESSING PACKAGING BODY USING SAME - The invention discloses a propylene resin sheet and a heat-treatable packaging material which have an excellent transparency, flexibility and very-low-temperature impact resistance, and which reduce the thickness variation during lamination, suppress appearance defects such as interfacial roughness. A propylene resin sheet composed of at least one layer, the main layer being made up of a resin composition containing: (1) 50 to 90 wt % of a propylene resin composition (A) which includes from 30 to 70 wt % of a propylene-α-olefin random copolymer component (A1) having a melting peak temperature of 120 to 150° C., and from 70 to 30 wt % of a propylene-α-olefin random copolymer component (A2) having a C | 07-11-2013 |
20130171389 | PROPYLENE RESIN MULTI-LAYER SHEET, AND PACKAGING BODY FOR HEAT TREATMENT USING SAME - The invention discloses a multilayer propylene resin sheet and a heat-treatable packaging material which have an excellent transparency, flexibility and very-low-temperature impact resistance, and which reduce the thickness variation during lamination, suppress appearance defects such as interfacial roughness and mitigate thinning during fabrication. The multilayer propylene resin sheet is composed of at least two layers, which are (1) an inner layer and (2) an outer layer. The inner layer (1) is made of a resin composition containing 40 to 89 wt % of a specific propylene resin composition (A), 10 to 40 wt % of a specific ethylene-α-olefin copolymer (B), and 1 to 20 wt % of a specific propylene resin (C). The outer layer (2) is made of a specific propylene resin composition. | 07-04-2013 |
20120302716 | METHOD FOR PRODUCING PROPYLENE-BASED POLYMER - A method for producing a propylene-based polymer, including polymerizing propylene or propylene and an α-olefin except propylene in the presence of a catalyst with a horizontal polymerization reactor equipped with stirring vanes rotating around a horizontal axis therein by a continuous vapor-phase polymerization, which removes heat of polymerization by heat of vaporization of a liquefied propylene, wherein the reactor can set a plurality of area sections different in temperature in a horizontal direction inside the reactor, and satisfies at least one of i) a temperature difference, ΔT | 11-29-2012 |
20120264893 | REACTOR FOR PROPYLENE POLYMERIZATION AND PROCESS FOR PRODUCING PROPYLENE POLYMER - A propylene polymerization reaction apparatus and a production method of a propylene-based polymer are capable of producing a continuous multi-stage polymer in low cost, high productivity and stably, and significantly reducing generation amount of an off-specification product accompanying change of polymerization condition, in multi-stage continuous vapor phase polymerization method of a propylene-based polymer using a catalyst for olefin polymerization. A reaction apparatus for producing a propylene-based polymer by a multi-stage continuous vapor phase polymerization method is used. One or more reactor of a horizontal-type reactor having inside a stirring machine which rotates around a horizontal axis, and a continuous stirred tank reactor to be connected to the horizontal-type reactor are provided, and a production method of a propylene-based polymer using the same. | 10-18-2012 |
20110311742 | MULTILAYER PROPYLENE RESIN SHEET AND HEAT-TREATABLE PACKAGING MATERIAL USING SAME - The invention provides a multilayer sheet and a heat-treatable packaging material which have excellent flexibility, transparency, impact resistance, heat resistance, heat-sealability and cleanliness, which are endowed with a good formability without readily incurring drawbacks such as external defects and thickness fluctuations when subjected to multilayer formation, and which, even at a reduced thickness, have an excellent sheet substrate strength decrease-inhibiting effect. | 12-22-2011 |
20110257351 | NOVEL TRIARYLPHOSPHINE OR TRIARYLARSINE COMPOUND, ALPHA-OLEFIN POLYMERIZATION CATALYST USING THE COMPOUND, TERNARY COPOLYMER, AND PRODUCTION PROCESS OF ALPHA-OLEFIN -((METH)ACRYLIC ACID)-BASED COPOLYMER - To provide an industrially useful α-olefin.((meth)acrylic acid)-based olefin copolymer having both a high molecular weight and a high comonomer content, a catalyst component capable of realizing a production of two different kinds of α-olefin.((meth)acrylic acid)-based olefin copolymers, and a production process using the catalyst. An α-olefin.((meth)acrylic acid)-based olefin copolymer is produced by using a metal complex complexed with a ligand represented by the following formula (Y is phosphorus or arsenic) for a catalyst composition. | 10-20-2011 |
20110230622 | METALLOCENE COMPLEX AND POLYMERIZATION METHOD OF OLEFIN - A metallocene complex by which high uptake efficiency of ethylene and/or α-olefin can be obtained compared with the conventional metallocene catalyst, and rubber component having high molecular weight can be polymerized, and polymerization method of olefin. | 09-22-2011 |
20110220851 | DISPERSION OF CARBON NANOTUBES AND NANOPLATELETS IN POLYOLEFINS - A method of dispersing nanotubes and/or nanoplatelets in a polyolefin is provided, involving A) preparing a solution comprising nanotubes or nanoplatelets or both; B) stirring the resulting solution from step (A); C) dissolving at least one polymeric material in the stirred solution from step (B) and isolating precipitates from the solution; and D) melt-blending the precipitates with at least one polyolefin, along with the nanocomposites prepared thereby, and articles formed from the nanocomposites. | 09-15-2011 |
20110213110 | NOVEL METAL COMPLEX AND METHOD FOR PRODUCING ALPHA-OLEFIN POLYMER AND METHOD FOR PRODUCING ALPHA-OLEFIN/(METH)ACRYLATE COPOLYMER USING THE SAME - A novel catalyst component for producing a crystalline α-olefin polymer or α-olefin/(meth)acrylate copolymer having few branches, especially a polymer having a high molecular weight, and a method for producing an α-olefin polymer or an α-olefin/(meth)acrylate copolymer using the catalyst component. | 09-01-2011 |
20100227987 | 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. | 09-09-2010 |
20100168323 | PROPYLENE-BASED POLYMER AND METHOD FOR PRODUCING THE SAME, AND PROPYLENE-BASED RESIN COMPOSITION - A propylene-based polymer comprising the following component (A) insoluble in p-xylene at 25° C. and component (B) soluble in p-xylene at 25° C., wherein (i) the weight average molecular weight (Mw) measured with GPC is 100,000 to 1,000,000, (ii) the content of the component insoluble in hot p-xylene is 0.3% by weight or lower, and (iii) the degree of strain hardening (λ max) in measurement of elongational viscosity is 2.0 or higher; and a method for producing the same, along with a resin composition comprising a propylene-ethylene copolymer (Z) in an amount of 50.0 to 99.9% by weight and a propylene-based polymer (M) in an amount of 0.1 to 50.0% by weight. | 07-01-2010 |
20100144990 | Propylene Block Copolymer and Process for Production Thereof - Disclosed is a propylene block copolymer having excellent flexibility and impact resistance and showing a good polymer powder form. Also disclosed is a process for producing the copolymer. More specifically, the copolymer is a novel propylene block copolymer which satisfies a specific requirement and is produced by a process comprising continuously performing a multi-step polymerization composed of a former step in which a propylene homopolymer component or a specific propylene copolymer component is produced in the presence of a metallocene catalyst carried on a support and a latter step in which propylene and a specific copolymer component are produced by gas phase polymerization. | 06-10-2010 |
20100099811 | PROPYLENE-BASED POLYMER AND PRODUCTION METHOD THEREFOR, PROPYLENE-BASED POLYMER COMPOSITION AND MOLDED BODY MADE THEREOF - Disclosed is a production method of polypropylene having high MFR value and excellent product qualities with high productivity. The method enables to produce a propylene polymer by a gas phase process where the reaction heat is removed mainly by the heat of vaporization of liquefied propylene. The method is characterized by using a solid catalyst component (A) which is prepared by contacting components (A1), (A2) and (A3) shown below. Further disclosed are: a propylene polymer produced by the method; a propylene polymer composition; and a molded body of the composition. Component (A1): a solid component containing titanium, magnesium and a halogen as essential components. Component (A2): a vinyl silane compound. Component (A3): an organosilicon compound having an alkoxy group (A3 | 04-22-2010 |
20090326136 | PROPYLENE-BASED BLOCK COPOLYMER COMPOSITION AND EXTERIOR MEMBER FOR AUTOMOBILE - A polypropylene resin composition for molding material, which is excellent in an appearance of weld line and an appearance of tiger stripe and is used for automobile exterior parts and an automobile exterior part comprising the same, are provided. A propylene-based block copolymer composition, comprising 100 parts by weight of a propylene-based block copolymer having an MFR of 50 to 100 g/10 minutes and an Mw/Mn of 7 or less, wherein the propylene-based block copolymer comprises 75 to 95% by weight of a crystalline polypropylene portion and 5 to 25% by weight of an ethylene-propylene copolymer portion, where the ethylene content of the ethylene-propylene copolymer portion is 35 to 45% by weight and the ratio of the weight-average molecular weight of the ethylene-propylene copolymer portion to the weight-average molecular weight of the crystalline polypropylene portion is 3 to 5; 25 to 45 parts by weight of an ethylene-α-olefin copolymer elastomer having an MFR of 1 to 9 g/10 minutes; and 30 to 45 parts by weight of talc having an average particle diameter of 1.5 to 15 μm. | 12-31-2009 |
20090292060 | Polypropylene Block Copolymer, Its Use, and Polyproylene Resin Composition Comprising Said Polypropylene Block Copolymer - Provided are a molding appearance modifier for resins capable of controlling appearance of large-sized molded parts only by small addition, and a polypropylene resin composition capable of providing good appearance to, for example, automobile exterior parts, and has excellent molding processability. The invention relates to a propylene block copolymer having a crystalline propylene polymer portion and a propylene•ethylene random copolymer portion, wherein the crystalline propylene polymer portion has an intrinsic viscosity [η] | 11-26-2009 |
20090259006 | PROPYLENE POLYMER, METHOD FOR PRODUCTION OF THE PROPYLENE POLYMER, PROPYLENE POLYMER COMPOSITION, AND MOLDED ARTICLE MANUFACTURED FROM THE COMPOSITION - Disclosed is a production method of polypropylene having high MFR value and excellent product qualities with high productivity. The method enables to produce a propylene polymer by a gas phase process where the reaction heat is removed mainly by the heat of vaporization of liquefied propylene. The method is characterized by using a solid catalyst component (A) which is prepared by contacting components (A1), (A2) and (A3) shown below. Further disclosed are: a propylene polymer produced by the method; a propylene polymer composition; and a molded body of the composition. Component (A1): a solid component containing titanium, magnesium and a halogen as essential components. Component (A2): a vinyl silane compound. Component (A3): an organosilicon compound having an alkoxy group (A3a) and/or a compound having at least two ether bonds (A3b). | 10-15-2009 |
20090131576 | MOLDABILITY MODIFIER AND POLYPROPYLENE RESIN COMPOSITION USING THE SAME - A moldability modifier capable of improving molding processability, and a polypropylene resin composition using the same suitable for automobile exterior parts are provided. The invention relates to a moldability modifier comprising propylene block copolymer (A) containing from 80 to 98 wt % of a propylene homopolymer portion (A1) and from 2 to 20 wt % of a propylene/ethylene random copolymer portion (A2), wherein the MFR of (A1) is 300 g/10 min or more, the ethylene content of (A2) is from 10 to 70 wt %, the [η] of (A2) is 6.5 dl/g or more, and the MFR as a whole is 40 g/10 min or more; and propylene block copolymer (B) containing from 20 to 79 wt % of a propylene polymer portion (B1) and from 21 to 80 wt % of a propylene/ethylene random copolymer portion (B2), wherein the MFR of (B1) is 20 g/10 min or more, the ethylene content of (B2) is from 20 to 70 wt %, the [η] of (B2) is from 2.5 to 9.0 dl/g, and the MFR as a whole is from 0.1 to 50 g/10 min; and a polypropylene resin composition using the same. | 05-21-2009 |
20090118414 | PROPYLENE RESIN COMPOSITION - A propylene resin composition which is a three-component material is improved in rigidity, heat resistance, and impact resistance while maintaining a satisfactory balance among these and further improved in low-temperature (about −30° C.) impact resistance. A propylene resin composition comprising:
| 05-07-2009 |
20090099310 | NOVEL TRANSITION METAL COMPOUND, CATALYST FOR OLEFIN POLYMERIZATION CONTAINING THE SAME, AND METHOD FOR PRODUCING PROPYLENE/ETHYLENE-ALPHA-OLEFIN BLOCK COPOLYMER BY USING THE CATALYST - Disclosed is a novel transition metal compound which is used for forming a metallocene catalyst for olefin polymerization. Specifically disclosed is a novel transition metal compound represented by the general formula below which enables to form a metallocene catalyst that has a balanced reactivity with ethylene and a comonomer selected from α-olefins having 3-20 carbon atoms and enables to produce an α-olefin polymer having a high molecular weight. Also specifically disclosed are a catalyst for olefin polymerization containing such a transition metal compound, and a method for producing a propylene/ethylene-α-olefin block copolymer wherein such a catalyst is used. | 04-16-2009 |
20090069171 | Catalysts for olefin polymerization, process for production of the catalysts, and method for preservation thereof - Olefin polymerization catalysts for producing polyolefin resins which can dispense with a melt-kneading step necessitating great energy or a substitute addition step therefor and to which small amounts of antioxidants have been effectively added; and a process for the production of the catalysts. Specifically, a catalyst for olefin polymerization characterized by being prepared by conducting prepolymerization in the presence of [I] a solid catalyst for olefin polymerization having a mean particle diameter of 10 to 200 μm, [II] an antioxidant for resins, and [III] an olefin; and a catalyst for olefin polymerization characterized by containing [IV] an organoaluminum compound in addition to the components [I] to [III]. | 03-12-2009 |