Abstract: Disclosed are a propylene polymer composition possessing excellent balance among rigidity and low warpage, resistance to deterioration caused by thermal oxidation during processing, weathering resistance, antistatic properties, and low bleeding properties, and a propylene resin composition which can easily produce molded products having excellent balance between rigidity and impact resistance (particularly low-temperature impact resistance) or heat resistance. The propylene polymer composition and the propylene resin composition comprise a propylene block copolymer consisting essentially of the following blocks (a) and (b) and having a melt flow rate of 0.

Abstract: The present invention provides a catalyst for olefin polymerization having high olefin polymerization activity without being accompanied by generation of an adhered polymer on the wall of a polymerization reactor and the wall of pipe line and generation of a blocking massive polymer, and capable of manufacturing an olefin polymer industrially and stably for a long period of time.

Abstract: A propylene polymer is characterized by satisfying the following (1) to (5): (1) a melt flow rate (MFR) measured at 230° C. under a 2.16 kg load of from 0.1 to 1000 g/10 min; (2) an isotactic triad traction (mm) measured by 13C-NMR of 99.0 % or above; (3) a Q value measured by gel permeation chromatography (GPC) of from 2.0 to 6.0; (4) a relation between melt flow rate (MFR: g/10 min) measured at 230° C. under a 2.16 kg load and a memory effect (ME) measured at 190° C. at an orifice diameter of 1.0 mm satisfying the following formula (I): 1.75≧(ME)+0.26×log(MFR)≧1.40  (I); and (5) a relation of the cold xylene solubles at 23° C. (CXS) satisfying the following formula (II) CXS≦0.5×[C2]+0.2×log(MFR)+0.5  (II) wherein [C2] represents the ethylene unit content (% by weight) in the polymer.

Abstract: An ethylene polymer excellent in molding processability represented by uniform extensibility, drawdown resistance, swell and extrudability, and mechanical properties represented by rigidity, impact resistance and ESCR, is provided. Particularly, an ethylene polymer remarkably excellent in balance between rigidity and ESCR as compared with a conventionally known ethylene polymer is provided.

Abstract: A catalyst component for olefin polymerization, which comprises an ion-exchange layered silicate having the following features 1 and 2: feature 1: in a pore size distribution curve calculated from desorption isotherm by nitrogen adsorption-desorption method, a pore diameter Dm showing a maximum peak intensity DVM is from 60 to 200 Å; and feature 2: in a pore size distribution curve calculated from desorption isotherm by nitrogen adsorption-desorption method, a pore diameter Dm1/2 (Å) on the smaller pore size side corresponding to a ½ peak intensity of the maximum peak intensity DVM has a relation of Dm1/2/Dm of at least 0.65 and less than 1, provided that the largest value is employed when there are a plurality of Dm1/2 values.

Abstract: A propylene polymer is characterized by satisfying the following (1) to (5):

Abstract: The present invention relates to a catalyst for polymerization of &agr;-olefin, which comprises:

Abstract: Catalysts for polymerization of &agr;-olefin, composed of a transition metal compound, an inorganic silicate or an ion exchangeable layer compound other than silicate, and optionally an organoaluminum compound, are described.

Abstract: Disclosed is a catalyst component for the polymerization of olefins, which is a compound having the following structure: wherein R1 is a hydrocarbon radical having 1 to 10 carbon atoms or a halogen-containing hydrocarbon radical having 1 to 10 carbon atoms, and R2s are each a hydrogen atom, a halogen atom, a siloxy group, a lower-alkyl-substituted siloxy group or a hydrocarbon radical having 1 to 10 carbon atoms, or which is a reaction product of the following sub-components (i) and (ii): sub-component (i) which is a compound having the formula R1—B—(OH)2 in which R1 is a hydrocarbon radical having 1 to 10 carbon atoms or a halogen-containing hydrocarbon radical having 1 to 10 carbon atoms; and sub-component (ii) which is an organoaluminum compound.

Abstract: A catalyst component for olefin polymerization, which comprises an ion-exchange layered silicate having the following features 1 and 2:

Abstract: Disclosed are a novel transition metal compound represented by the following general formula (I), a catalyst component for olefin polymerization comprising same, a catalyst for olefin polymerization comprising said catalyst component, and a process for the preparation of an a-olefin polymer: where the definition of formula (I) is described in the specification.

Abstract: A block copolymer is provided comprising one or more blocks of a propylene polymer (PP) and one or more blocks of an ethylene-propylene copolymer (EPR) having the properties: (1) the interface thickness of the PP block with EPR block is from 20-1000 nm; (2) the weight average molecular weight of the PP block is 10,000-1,000,000; (3) the proportion of mesopentad chain in the PP block is not less than 95%; (4) the particle diameter of the disperse phase in EPR block is 0.2-3 microns; (5) the weight average molecular weight of the EPR block is 50,000-1000,000; (6) the propylene content in the EPR block is 20-80 mole %; (7) the composition fluctuation in molecular weight in EPR block is within +/−5% from the average composition.

Abstract: Catalysts for polymerization of &agr;-olefin, composed of a transition metal compound, an inorganic silicate or an ion exchangeable layer compound other than silicate, and optionally an organoaluminum compound, are described.

Abstract: The present invention relates to a catalyst for polymerization of &agr;-olefin, which comprises: an essential component (A) of a transition metal compound, an essential component (B) of an ion exchangeable layer compound except for silicate, or an inorganic silicate, and an optional component (C) of an organoaluminum compound, said component (A) being represented by the general formula (I):

Abstract: Catalysts for polymerization of &agr;-olefin, composed of a transition metal compound, an inorganic silicate or an ion exchangeable layer compound other than silicate, and optionally an organoaluminum compound, are described.

Abstract: The present invention relates to a catalyst for polymerization of &agr;-olefin, which comprises:

Abstract: There is provided a catalyst for the polymerization of ethylene, comprising the following components [A] and [B] in combination:

Abstract: Disclosed are a novel transition metal compound represented by the following general formula (I), a catalyst component for olefin polymerization comprising same, a catalyst for olefin polymerization comprising said catalyst component, and a process for the preparation of an a-olefin polymer: 1

Abstract: The present invention provides a polypropylene block copolymer or resin composition excellent in impact resistance and rigidity.

Abstract: An alkali metal- or alkali earth metal-containing organic compound (i) is reacted with a leaving group- and silicon- or germanium-containing compound (ii) in the presence of a nitrogen-containing aromatic heterocyclic compound. By such a method, it is possible to produce a silicon- or germanium-containing organic compound, for example, a cyclopentadienyl compound cross-linked by a silicon atom or a germanium atom, typically a cyclopentadienyl compound which is substituted with a substituted or unsubstituted silyl or germyl group, for a short time with a high yield.