A polypropylene resin composition includes a base resin including an isotactic polypropylene resin, a first atactic polypropylene resin, and a second atactic polypropylene resin; a thermoplastic elastomer; and an inorganic filler, in which a weight average molecular weight of the second atactic polypropylene resin is higher than a weight average molecular weight of the first atactic polypropylene resin.

An atactic polypropylene comb-block polyolefin comprising two blocks including a polyolefin backbone and atactic polypropylene combs pendant to the backbone having a weight average molecular weight of at least 8000 g/mole and a crystallinity of less than 20%, where the atactic polypropylene comb-block polyolefin has comb number of at least 2. The atactic polypropylene comb-block polyolefin is made by contacting at a temperature within a range from 20 to 70 C. propylene with a first metallocene precursor to form vinyl-terminated atactic polypropylene to form vinyl-terminated atactic polypropylene, then contacting at a temperature within a range from 40 to 150 C. the vinyl-terminated atactic polypropylene with ethylene, propylene, or both and a second metallocene precursor to form the backbone.

An atactic polypropylene comb-block polyolefin comprising two blocks including a polyolefin backbone and atactic polypropylene combs pendant to the backbone having a weight average molecular weight of at least 8000 g/mole and a crystallinity of less than 20%, where the atactic polypropylene comb-block polyolefin has comb number of at least 2. The atactic polypropylene comb-block polyolefin is made by contacting at a temperature within a range from 20 to 70 C. propylene with a first metallocene precursor to form vinyl-terminated atactic polypropylene to form vinyl-terminated atactic polypropylene, then contacting at a temperature within a range from 40 to 150 C. the vinyl-terminated atactic polypropylene with ethylene, propylene, or both and a second metallocene precursor to form the backbone.

A tire comprising a tire frame that comprises a resin material and has a circular shape, and a metal-resin composite, the metal-resin composite having a structure in which a metal member, an adhesive layer and a resin layer are disposed in this order, and the tire satisfying the following conditions (1) to (3): (1) the adhesive layer comprises an acid-modified polyolefin as a first resin and a resin that is different from the an acid-modified polyolefin as a second resin, and a content of the first resin is 50% by mass or more of the entire resin in the adhesive layer; (2) the adhesive layer has a storage elastic modulus at 10 C. of 850 MPa or less; (3) the adhesive layer has a storage elastic modulus at 140 C. of 1.5 MPa or more.

A stretch film incorporating a cling layer and a slip skin layer is provided, the cling layer comprising a 25% to 75% ethylene-based elastomer blend in a metallocene linear low density polyethylene and the slip skin layer comprising an ultra-high molecular weight polysiloxane polymer of between 5% and 10% by weight.

A stretch film incorporating a cling layer and a slip skin layer is provided, the cling layer comprising a 25% to 75% ethylene-based elastomer blend in a metallocene linear low density polyethylene and the slip skin layer comprising an ultra-high molecular weight polysiloxane polymer of between 5% and 10% by weight.

A polypropylene resin composition includes a base resin including an isotactic polypropylene resin, a first atactic polypropylene resin, and a second atactic polypropylene resin; a thermoplastic elastomer; and an inorganic filler, in which a weight average molecular weight of the second atactic polypropylene resin is higher than a weight average molecular weight of the first atactic polypropylene resin.

A hot-melt glue composition, including a) at least one atactic poly--olefin (APAO) that is solid at 25 C.; b) at least one hydrocarbon resin having a softening point of at least 80 C., measured in accordance with the ring-and-ball method according to DIN EN 1238; and c) at least one maleic-anhydride-grafted wax having a softening point of not more than 150 C., measured in accordance with the ring-and-ball method according to DIN EN 1238, which is a maleic-anhydride-grafted polypropylene wax or a maleic-anhydride-grafted polyethylene wax, wherein the proportion of the at least one maleic-anhydride-grafted wax in the hot-melt glue composition is at least 3 wt %. The hot-melt glue composition is characterized by a low reactivation temperature, together with high heat resistance and good adhesion to ABS and nonpolar polyolefin materials. The hot-melt glue composition is well suited for film lamination by vacuum deep-drawing lamination, in particular for applications in automobile construction.

The present invention provides a hydrogenated block copolymer containing, in the molecule thereof, a polymer block (C) having a conjugated diene compound as a main component, a polymer block (B) having a conjugated diene compound as a main component, and a polymer block (S) having a vinyl aromatic compound as a main component, wherein: in the hydrogenated block copolymer, a content of the polymer block (C) is 1 to 20% by mass, a content of the polymer block (B) is 69 to 98% by mass, and a content of the polymer block (S) is 1 to 15% by mass; a vinyl bond content before hydrogenation of the polymer block (C) is 1 to 25 mol %, and a vinyl bond content before hydrogenation of the polymer block (B) is 60 to 100 mol %; a degree of hydrogenation of the hydrogenated block copolymer is 80 mol % or more; and a tan ? peak obtained by the dynamic viscoelasticity measurement (1 Hz) of the hydrogenated block copolymer is in the range of higher than ?45? C. and 10? C. or lower, a height of the tan ? peak is 1.0 or more, and a width at half height of the tan ? peak is 20? C. or lower.

This invention relates to a polyolefin composition with (a) 80 to 90 wt % of an amorphous ethylene-propylene copolymer having either no crystallinity or crystallinity derived from ethylene, having about 30 wt % or more units derived from ethylene; (b) 5 to 15 wt % of a semi-crystalline ethylene-propylene copolymer having substantial crystallinity derived from ethylene and having 70 wt % or more units derived from ethylene; and (c) 1 to 5 wt % of a propylene-based elastomer having within the range from 5 to 25 wt % ethylene derived units and having a melting point temperature of less than 110 C. and a Mw/Mn within the range from 2.0 to 4.0.