Abstract: A propylene type resin composition comprising from 95.0 to 99.999 parts by weight of component (A) which is a propylene/&agr;-olefin random copolymer polymerized by a metallocene catalyst, and from 0.001 to 5.0 parts by weight of component (C) which is a polyethylene wax, wherein components (A) and (C) satisfy the following conditions: Component (A): Propylene/&agr;-olefin random copolymer 1) Melt index at 230° C.: 2 to 30 g/10 min 2) Main melting peak temperature (Tm) obtained by DSC: 110 to 145° C. Component (C): Polyethylene wax 1) Density: 0.94 to 0.98 g/cm3 2) Melt viscosity at 140° C.: At least 10 cps.

Abstract: An olefin polymerization catalyst comprising the following components (A) and (B): Component (A): an ion-exchange layered silicate having an acid site of at most −8.2 pKa, the amount of the acid site is equivalent to at least 0.05 mmol/g of 2,6-dimethylpyridine consumed for neutralization; and Component (B): a compound of a transition metal belonging to Group 3 to Group 12 of the Periodic Table.

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

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: A resin composition for heat-shrinkable polypropylene shrink label, comprises: from 50 to 95% by weight of a crystalline propylene-&agr;-olefin random copolymer mainly comprising propylene, the copolymer satisfying the following requirements (1) to (3); and from 5 to 50% by weight of an alicyclic hydrocarbon resin having a softening temperature of not lower than 110° C.

Abstract: A propylene type resin composition comprising from 95.0 to 99.999 parts by weight of component (A) which is a propylene/a-olefin random copolymer polymerized by a metallocene catalyst, and from 0.001 to 5.

Abstract: An olefin polymerization catalyst comprising the following components (A) and (B):

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

Abstract: A propylene block copolymer having a high impact resistance is prepared without the generation of finely divided particles or the adhesion to the reactor, which propylene block copolymer having a weight ratio of 5/95-70/30 (process (1)/process (2)) is obtained by carrying out the particular polymerization processes (1) and (2) in this sequence under the action of the catalyst comprising the following A and B.A: particular transition metal compound.B: an alumoxane, the reaction product of an alkylboronic acid with an organoAl, a Lewis acid or ionic compound.Process (1): process for copolymerizing propylene and a specified comonomer in a ratio of 0/100-80/20.Process (2): process for producing a propylene polymer having a specified comonomer in an amount of 10% by weight or less.