Patent application number | Description | Published |
20100004395 | PROCESS FOR PRODUCING PROPYLENE BLOCK COPOLYMER - A production process of a propylene block copolymer, comprising the step (I) of polymerizing propylene alone or a combination of propylene with an olefin other than propylene, in the presence of a defined polymerization catalyst, to form a polymer component (1), and the step (II) of copolymerizing propylene with an olefin other than propylene in the presence of the polymer component (1), to form a polymer component (2), wherein a combination of a transition metal compound such as Zr(OR | 01-07-2010 |
20100168341 | PROCESS FOR PRODUCING PROPYLENE BLOCK COPOLYMER - A production process of a propylene block copolymer, comprising the steps of (I) contacting a solid catalyst component containing titanium atoms, magnesium atoms and halogen atoms with an organoaluminum compound and an external electron donor represented by the defined formula, thereby forming a polymerization catalyst, (II) polymerizing propylene in the presence of the polymerization catalyst, thereby forming a polymer component (1) having an intrinsic viscosity, [η]1, and (III) copolymerizing propylene with an olefin other than propylene in the presence of the polymer component (1), thereby forming a polymer component (2) having an intrinsic viscosity, [η]2, which is three times or more [η]1. | 07-01-2010 |
20100168349 | PROCESS FOR PRODUCING ALPHA-OLEFIN POLYMERIZATION CATALYST - A production process of an α-olefin polymerization catalyst, comprising the steps of (1) reducing a titanium compound represented by a defined formula with an organomagnesium compound in the presence of an Si—O bond-containing silicon compound, (2) contacting the resultant solid catalyst component precursor, a halogenating compound and an internal electron donor with one another, and (3) contacting the resultant solid catalyst component, an organoaluminum compound and a Si-containing external electron donor represented by a defined formula with one another; and a production process of an olefin polymer using the above catalyst. | 07-01-2010 |
20100280197 | MODIFIED PARTICLE, SUPPORT, CATALYST COMPONENT FOR ADDITION POLYMERIZATION, CATALYST FOR ADDITION POLYMERIZATION, AND PROCESS FOR PRODUCING ADDITION POLYMER - A process for producing a modified particle, which involves the step of contacting with one another compounds (a), (b) and (c) represented by the defined general formulas M | 11-04-2010 |
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 |
20110301296 | PROCESS FOR PRODUCING PROPYLENE BLOCK COPOLYMER - A propylene block copolymer comprising 60 to 85% by weight of a propylene polymer component and 15 to 40% by weight of an ethylene-propylene copolymer component, and satisfying the following requirements (I) to (V): (I) the above propylene polymer component has a melting temperature of 160° C. or higher measured according to DSC; (II) the above ethylene-propylene copolymer component has an ethylene content of 40 to 60% by weight measured according to a | 12-08-2011 |
Patent application number | Description | Published |
20090326157 | ETHYLENE-PROPYLENE COPOLYMER, AND POLYPROPYLENE RESIN COMPOSITION COMPRISING THE SAME - 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:
| 12-31-2009 |
20090326158 | PROPYLENE BLOCK COPOLYMER - A propylene block copolymer satisfying the following requirements, which is obtained by producing in the step | 12-31-2009 |
20100036058 | PROPYLENE BLOCK COPOLYMER - A propylene block copolymer comprising 60 to 85% by weight of a propylene polymer component and 15 to 40% by weight of an ethylene-propylene copolymer component, and satisfying the following requirements (I) to (V): (I) the above propylene polymer component has a melting temperature of 160° C. or higher measured according to DSC; (II) the above ethylene-propylene copolymer component has an ethylene content of 40 to 60% by weight measured according to a | 02-11-2010 |
20100048822 | POLYPROPYLENE RESIN COMPOSITION - There are provided a polypropylene resin composition and a molded article thereof, the composition comprising:
| 02-25-2010 |
20110269928 | PROCESS FOR PRODUCING SOLID CATALYST COMPONENT FOR OLEFIN POLYMERIZATION - The present invention aims at providing a solid catalyst component for olefin polymerization, the solid catalyst composed being capable of showing a sufficiently high polymerization activity and providing a polymer having a low content of a low molecular weight component or an amorphous component; a process for producing the solid catalyst component; and a process for producing a solid catalyst for olefin polymerization, and a process for producing an olefin polymer. This object can be achieved by a process for producing a solid catalyst component (A), the process including: step (1) of producing a precursor of the solid catalyst component by adding an organomagnesium compound (c) to a titanium compound (b) represented by Formula (I) in the presence of a silicon compound containing a Si—O bond (a); and step (2) of producing the solid catalyst component (A) by bringing the precursor of the solid catalyst component, a halogenated metal compound represented by Formula (II) and an internal electron donor represented by Formula (III) into contact with each other. | 11-03-2011 |
20110269929 | PROCESS FOR PRODUCING SOLID CATALYST COMPONENT FOR OLEFIN POLYMERIZATION - The present invention aims at providing a process for producing a solid catalyst for olefin polymerization, the solid catalyst component being capable of providing a polymer having high stereoregularity when an α-olefin is polymerized; a process for producing a solid catalyst component, which is used for producing the solid catalyst; and a process for producing an olefin polymer using the solid catalyst. This object can be achieved by a process for producing a solid catalyst component (A), the process including a step of bringing a titanium compound (a), a magnesium compound (b) and an internal electron donor represented by Formula (I) into contact with each other: | 11-03-2011 |