Abstract: A process for producing an olefin polymerization catalyst, comprising steps of (1) contacting a defined amount of a zinc compound represented by the defined formula, Zn(L1)2, with a defined amount of a halogenated alcohol represented by the defined formula, R1R2R3C—OH, thereby forming a zinc atom-containing compound, and (2) contacting the zinc atom-containing compound, a solid catalyst component containing a titanium atom, a magnesium atom and a halogen atom, an organoaluminum compound, and an external electron donor with one another; and a production process of an olefin polymer, comprising a step of polymerizing an olefin in the presence of an olefin polymerization catalyst produced by the above process.

Abstract: 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 M1L1m, R1t-1TH and H2O, respectively, and a particle (d), in which M1 is a metal atom of Group 1, 2, 12, 14 or 15 of the periodic table, m is a valence of M1, L1 is a hydrogen atom, a halogen atom or a hydrocarbon group, which may be the same or different when plural L1's exist, R1 is an electron-withdrawing group or an electron-withdrawing group-containing group, which may be the same or different when plural R1's exist, T is a non-metal atom of Group 15 or 16 of the periodic table, and t is a valence of T; and a particle (d), wherein the compound (a) to (c) and the particle (d) are contacted in defined orders and in defined solvents; a carrier comprising said modified particle; a catalyst component for addition polymerization comprising said modified particle; a catalyst for addition polymerization using said catalyst component; and a proc

Abstract: Propylene-based block copolymer particles in accordance with the present invention are obtained by copolymerizing ethylene and propylene to form an ethylene-propylene copolymer in the presence of propylene polymer particles. The ratio of the intrinsic viscosity ?A of a 20° C. xylene-soluble component of the copolymer particles to the intrinsic viscosity ?B of a 20° C. xylene-insoluble component of the copolymer particles, ?A/?B, is 2.9 to 7.5. The content of the ethylene-propylene copolymer is 5 to 50 wt. % on the basis of the total weight of the block copolymer particles. The ethylene content of the ethylene-propylene copolymer is 20 to 55 wt. % on the basis of the weight of the ethylene-propylene copolymer. The standard deviation of the ethylene contents of the individual block copolymer particles is less than 7.

Abstract: An ethylene-propylene copolymer having a cold xylene solubles weight percent greater than twice the magnitude of the ethylene content wherein the ethylene content is measured by C13-NMR and having less than about 30% of the cold xylene solubles fraction having a log weight average chain length of less than about 1000 wherein the weight average chain length is measured by gel permeation chromatography.

Abstract: A polypropylene is disclosed which is a linear polypropylene having a ratio of a Z-average molecular weight Mz to a weight-average molecular weight Mw, Mz/Mw, determined by gel permeation chromatography of 4.1 or more, a swell ratio of from 1.4 to 1.8, and an activation energy of flow of from 48 to 105 kJ/(mol·K).

Abstract: A propylene-based polymer having a melt flow rate of 0.1 to 20 g/10 min. and a melting point Tm (° C.) measured by using a differential scanning calorimeter (DSC) of 147 to 159° C., in which the half width HW (° C.) of the melting peak measured by using a differential scanning calorimeter (DSC) and the melting point Tm (° C.) satisfy the relation: HW≦(188−Tm)/5.

Abstract: A modified particle obtained by contacting the following (a), the following (b), the following (c) and a particle (d) with one another,

Abstract: A propylene-based polymer having a melt flow rate of 0.1 to 20 g/10 min. and a melting point Tm (° C.) measured by using a differential scanning calorimeter (DSC) of 147 to 159° C., in which the half width HW (° C.) of the melting peak measured by using a differential scanning calorimeter (DSC) and the melting point Tm (° C.) satisfy the relation: HW≦(188−Tm)/5.