Abstract: The invention relates to a magnesium compound effective in producing olefin polymers having an increased bulk density and a narrowed particle size distribution, not lowering the stereospecificity of the polymers produced and not lowering the polymerization activity in producing the polymers, to an olefin polymerization catalyst comprising the compound, and to a method for producing such olefin polymers. The olefin polymerization catalyst comprises (A) a solid catalyst component prepared by contacting a magnesium compound having a specific particle size distribution index (P), a titanium compound and an electron donor compound with each other, (B) an organometallic compound, and (C) an electron donor. The olefin polymerization method comprises polymerizing an olefin in the presence of the catalyst to give olefin polymers.

Abstract: The invention relates to a magnesium compound effective in producing olefin polymers having an increased bulk density and a narrowed particle size distribution, not lowering the stereospecificity of the polymers produced and not lowering the polymerization activity in producing the polymers, to an olefin polymerization catalyst comprising the compound, and to a method for producing such olefin polymers. The olefin polymerization catalyst comprises (A) a solid catalyst component prepared by contacting a magnesium compound having a specific particle size distribution index (P), a titanium compound and an electron donor compound with each other, (B) an organometallic compound, and (C) an electron donor. The olefin polymerization method comprises polymerizing an olefin in the presence of the catalyst to give olefin polymers.

Abstract: The invention relates to a magnesium compound effective in producing olefin polymers having an increased bulk density and a narrowed particle size distribution, not lowering the stereospecificity of the polymers produced and not lowering the polymerization activity in producing the polymers, to an olefin polymerization catalyst comprising the compound, and to a method for producing such olefin polymers. The olefin polymerization catalyst comprises (A) a solid catalyst component prepared by contacting a magnesium compound having a specific particle size distribution index (P), a titanium compound and an electron donor compound with each other, (B) an organometallic compound, and (C) an electron donor. The olefin polymerization method comprises polymerizing an olefin in the presence of the catalyst to give olefin polymers.

Abstract: The present invention provides a catalyst for bulk or vapor-phase polymerization having high polymerization activity during bulk or vapor-phase polymerization and providing an olefin polymer having excellent properties in melt flow rate and stereoregularity by adding a small amount of hydrogen. The catalyst for bulk or vapor-phase polymerization of an &agr;-olefin compound under a presence of hydrogen, the catalyst is made by contacting the following ingredients (A) to (C). (A) a solid catalyst ingredient, comprising: (a) a magnesium compound, (b) titanium tetrachloride, and (c) dialkyl phthalate (Each of the alkyl group denotes a straight-chain or branched-chain hydrocarbon group having a carbon number of 3 to 20.); (B) an organoaluminum compound; and (C) an organosilicon compound, which is expressed by the following general chemical formula (1).

Abstract: A synthetic image print system has an additional image extraction function for extracting additional images based on extraction criteria. An additional image extraction program, the data of each additional image, and an additional image feature information file listing features of each additional image are stored on storage. Of all additional images, the additional images with the feature information corresponding with the extraction criteria are extracted. The features of a photographed image, a search keyword inputted by a user, the user profile information and the like are used as the extraction criteria.

Abstract: A first crystalline polypropylene of the present invention satisfies the relationships of the following formulae (1) and (2): &agr;≦−0.42×ln(Mp)+7.3  (1),and Tm>1.85×ln(Mp)+144.5  (2), wherein &agr; is a 0° C. soluble content (% by weight) as measured through programmed-temperature fractionation, Mp is a peak molecular weight in a molecular weight distribution curve as measured through gel permeation chromatography, and Tm is a melting point (° C.) as measured through differential scanning calorimetry. A second crystalline polypropylene of the present invention satisfies the relationship given in the following formula (3): &agr;≦1.11[&eegr;]−0.42+1.40  (3) wherein &agr; is the same as above and [&eegr;] an intrinsic viscosity (dl/g) as measured in a tetralin solvent at 135° C.

Abstract: A propylene homopolymer or a copolymer of propylene and an &agr;-olefin with at least 4 carbon atoms, which is produced through polymerization in the presence of a metallocene catalyst and which has an increased isotactic pentad fraction and a reduced molecular weight distribution; and also a propylene-based polymer composition as prepared by adding a nucleating agent to the homopolymer or the copolymer are superior to conventional polymers and polymer compositions, as they have well-balanced toughness and heat-sealability, and are not sticky, and, in addition, they have excellent anti-blocking properties. Their films especially those for wrapping and packaging edibles are tough and have excellent anti-blocking properties, and high film impact resistance. The polymer and the polymer composition have good moldability.

Abstract: Provided are a catalyst for olefin polymer production, which contains an organosilicon compound having a specific structure and with which olefin polymers produced have increased stereospecificity and increased melt fluidity; and a method for producing such olefin polymers.

Abstract: Provided are a solid catalyst component for olefin polymerization and a catalyst comprising the component for olefin polymerization, in which the electron donor is free from the problem of lacking in safety and sanitation, and is inexpensive and easy to produce, and which exhibit high activity in producing olefin polymers with high stereospecificity, and also a method for producing olefin polymers in the presence of the catalyst. The solid catalyst component comprises titanium, magnesium and an electron donor compound of formula (I): wherein R1 and R2 each represent a linear or branched hydrocarbon residue having from 1 to 20 carbon atoms; R3 represents an alicyclic hydrocarbon residue having from 3 to 20 carbon atoms; and n represents an integer of from 1 to 10. The solid catalyst component is combined with an organic aluminium compound to prepare a catalyst, which is used in producing olefin polymers.

Abstract: Provided is a crystalline polypropylene of which the 0° C. soluble content, &agr; (% by weight), as measured through programmed-temperature fractionation and the molecular weight, Mp, for the peak in the molecular weight distribution curve as measured through gel permeation chromatography satisfy the relationship of the following formula (1): &agr;≦−0.42×ln(Mp)+7.3  (1), and the melting point, Tm (° C.), as measured through differential scanning calorimetry and Mp satisfy the relationship of the following formula (2): Tm>1.85×ln(Mp)+144.5  (2). Also provided are moldings and films of the crystalline polypropylene. The crystalline polypropylene and its moldings and films are highly rigid and have good heat resistance and good scratch resistance.

Abstract: A first crystalline polypropylene of the present invention satisfies the relationships of the following formulae (1) and (2):

Abstract: Solid catalyst components for the polymerization of olefins, comprising titanium, magnesium and a compound of general formula (I), wherein R1 and R2 may be the same or different and each represents a linear or branched hydrocarbon group having 1 to 20 carbon atoms, and n is an integer of 1 to 10, as an electron donor, which are combined with organoaluminum compounds to form polymerization catalysts for the production of olefin polymers. This electron donor has no problems of safety and hygiene, and is inexpensive and easily synthesized. This compound can provide highly active and highly stereoregular solid catalyst components for the polymerization of olefins, catalysts for the polymerization of olefins, and processes for producing olefin polymers.

Abstract: The invention relates to a magnesium compound effective in producing olefin polymers having an increased bulk density and a narrowed particle size distribution, not lowering the stereospecificity of the polymers produced and not lowering the polymerization activity in producing the polymers, to an olefin polymerization catalyst comprising the compound, and to a method for producing such olefin polymers. The olefin polymerization catalyst comprises (A) a solid catalyst component prepared by contacting a magnesium compound having a specific particle size distribution index (P), a titanium compound and an electron donor compound with each other, (B) an organometallic compound, and (C) an electron donor. The olefin polymerization method comprises polymerizing an olefin in the presence of the catalyst to give olefin polymers.

Abstract: Provided are a solid catalyst component for olefin polymerization and a catalyst comprising the component for olefin polymerization, in which the electron donor is free from the problem of lacking in safety and sanitation, and is inexpensive and easy to produce, and which exhibit high activity in producing olefin polymers with high stereospecificity, and also a method for producing olefin polymers in the presence of the catalyst. The solid catalyst component comprises titanium, magnesium and an electron donor compound of formula (I): wherein R1 and R2 each represent a linear or branched hydrocarbon residue having from 1 to 20 carbon atoms; R3 represents an alicyclic hydrocarbon residue having from 3 to 20 carbon atoms; and n represents an integer of from 1 to 10. The solid catalyst component is combined with an organic aluminium compound to prepare a catalyst, which is used in producing olefin polymers.

Abstract: Provided are propylene-ethylene block copolymers having the advantage of well-balanced physical properties of rigidity, impact resistance, etc. The propylene-ethylene block copolymers are characterized by (a), (b), (c1), (c2) and (c3): (a) The melt flow rate falls between 0.01 and 1000 g/10 min. (b) The room-temperature xylene-insoluble component has an [mmmm] fraction of not smaller than 98.9%. (cl) The amount of the room-temperature xylene-soluble component falls between 3 and 50% by weight. (c2) The T1 relaxation time component in pulse NMR is of a single relaxation component. (c3) The ethylene content, x % by weight, as measured through 13C-NMR, and the T1 relaxation time satisfy y≦0.0014x3−0.0897x2−1.0593x +231.6. The block copolymers may be characterized by (a), (b), (c1) and (c4): (a) The melt flow rate falls between 0.01 and 1000 g/10 min. (b) The room-temperature xylene-insoluble component has an [mmmm] fraction of not smaller than 98.9%.

Abstract: A solid product as a catalyst component for an olefin polymerization catalyst is obtained by the reaction of metallic magnesium, an alcohol, and a halogen in an amount ranging from 0.019 to 0.06 gram-atom per one mole of metallic magnesium. Alternatively, the halogen component is a halogen-containing compound which contains not less than 0.0001 gram-atom of a halogen atom per one gram-atom of metallic magnesium.

Abstract: After a container is placed on a rest base beneath a beverage dispensing section where a dispensing outlet is provided, a dispensing button is depressed and a stepping motor constituting a base tilting drive device is driven for a predetermined time period to cause a linear head to be extended so that the rest base and hence a container is tilted as one unit. A dispensing valve drive device is operated to open a dispensing valve and dispense a bubbling beverage along an inner wall of the container, while suppressing any excessive formation of bubbles. When a bubble surface or liquid level of the beverage dispensed into the container rises to a predetermined level, the stepping motor is reversely driven to bring the container to an erect state. When the container becomes full with the beverage, the dispensing valve is closed, stopping the dispensing of the beverage.