A solid catalyst component for polymerization of olefins is disclosed which can produce a polymer having low stickiness (tackiness) of polymer particles, excellent flowability, and favorable particle size distribution. The solid catalyst component for polymerization of olefins includes titanium, magnesium, a halogen atom and an internal electron donor, wherein the solid catalyst component has a multimodal pore volume distribution measured by a mercury intrusion method and has one or more peak tops in each of a pore radius range from 0.002 m to 1 m and a pore radius range from larger than 1 m to 30 m or smaller, and a ratio represented by pore volume V1 derived from pores in the radius range from 0.002 m to 1 m/pore volume V2 derived from pores in the radius range from larger than 1 m to 30 m or smaller is 0.30 to 0.65.

The present invention relates to a novel Group 4 transition metal compound, a method for preparing the compound, a catalyst composition comprising the compound, and a method for preparing a polyolefin comprising performing a polymerization reaction of olefin monomers, in the presence of the catalyst composition. Since the Group 4 transition metal compound of the present invention exhibits an excellent catalytic activity in polyolefin synthesis reactions, as well as having excellent thermal stability, it can be used for polyolefin synthesis reactions at high temperatures, and by changing the type of a central metal and ligand, the weight average molecular weight of synthesized polyolefins and the octene content in the polymer can be controlled. Therefore, it can be effectively used in polyolefin synthesis processes in which grades are controlled.

The present invention relates to a novel Group 4 transition metal compound, a method for preparing the compound, a catalyst composition comprising the compound, and a method for preparing a polyolefin comprising performing a polymerization reaction of olefin monomers, in the presence of the catalyst composition. Since the Group 4 transition metal compound of the present invention exhibits an excellent catalytic activity in polyolefin synthesis reactions, as well as having excellent thermal stability, it can be used for polyolefin synthesis reactions at high temperatures, and by changing the type of a central metal and ligand, the weight average molecular weight of synthesized polyolefins and the octene content in the polymer can be controlled. Therefore, it can be effectively used in polyolefin synthesis processes in which grades are controlled.

A thermoplastic vulcanizate composition includes (A) greater than 15 wt % of a block composite that has (i) an ethylene/alpha-olefin/diene interpolymer in which the alpha-olefin is an alpha olefin monomer having from 3 to 10 carbon atoms and the diene is a diene monomer having from 2 to 25 carbon atoms, (ii) a propylene based polymer, and (iii) a block copolymer comprising a soft block and a hard block in which the soft block has the same composition as the ethylene/alpha-olefin/diene polymer and the hard block has the same composition as the propylene based polymer; and (B) a remainder of a curative system and optionally at least one of a vulcanizable elastomer, a thermoplastic polyolefin, and an oil.

A linear diblock copolymer of the general structure Polymer A-linkage-Polymer B, wherein Polymer A is essentially a nonpolar polymeric entity being a copolymer of propylene and ethylene, with propylene representing 51 to 99 weight percent of Polymer A; and Polymer B is a polymeric polar entity; and the use of said diblock copolymer to modify polymer bulk and interfacial properties in end applications as well as the intermediate material Polymer A-linkage useful in the manufacture of the diblock copolymer.

Provided is a thermoplastic resin composition comprising polypropylene and a multi-block copolymer. The thermoplastic resin composition including the polypropylene and the multi-block copolymer exhibits excellent scratch resistance, and thus may be usefully used as a resin composition in the manufacturing of products requiring scratch resistance, such as automotive interior materials.

To provide a solid catalyst component for polymerization of an olefin, which can easily produce a polymer of an olefin, which is excellent in fluidity and also is high in rigidity even though the molecular weight distribution is narrow, without performing complicated polymerization treatment. A solid catalyst component for polymerization of an olefin includes magnesium, titanium and halogen, and further includes an aromatic carboxylic acid ester and a 1,3-diether compound as internal electron-donating compounds, wherein a content ratio of the titanium is 0.5 to 2.0% by mass, a content ratio of the aromatic carboxylic acid ester in a total content of the internal electron-donating compounds is 40 to 60 mol %, and a content ratio of the 1,3-diether compound in the total content of the internal electron-donating compounds is 40 to 60 mol %.

The invention provides a multimodal propylene butene random copolymer having a melt flow rate (MFR.sub.2) of 1.0 to 20.0 g/10 min and a butene content of 5.0 to 20.0 wt %, wherein said copolymer is prepared using a single site catalyst and wherein said copolymer comprises: (i) 30 to 70 wt % of a propylene butene copolymer (A) having an MFR.sub.2 of 0.5 to 20.0 g/10 min and a butene content of 2.0 to 10.0 wt %; and (ii) 70 to 30 wt % of a propylene butene copolymer (B) having an MFR.sub.2 of 0.5 to 20.0 g/10 min and a butene content of 4.0 to 20.0 wt %; wherein copolymers (A) and (B) are different.

An elastomeric article comprising an olefin-block copolymer comprising within a range from 4 to 40 mol % of C4 to C12 -olefin derived units, the remainder being ethylene-derived units, wherein the melting point temperature (T.sub.m2) is within a range from 92 C. to 120 C., and having an M.sub.w/M.sub.n value of less than 2.5. The olefin-block copolymer is desirably generated by combining ethylene, C4 to C12 -olefins, a single site catalyst, preferably a fluxional catalyst, and an activator. The elastomeric article may be an elastic hygiene garment, especially a garment comprising a waistband, stretch ear panels and/or belly bands.

An elastomeric article comprising an olefin-block copolymer comprising within a range from 4 to 40 mol % of C4 to C12 -olefin derived units, the remainder being ethylene-derived units, wherein the melting point temperature (T.sub.m2) is within a range from 92 C. to 120 C., and having an M.sub.w/M.sub.n value of less than 2.5. The olefin-block copolymer is desirably generated by combining ethylene, C4 to C12 -olefins, a single site catalyst, preferably a fluxional catalyst, and an activator. The elastomeric article may be an elastic hygiene garment, especially a garment comprising a waistband, stretch ear panels and/or belly bands.