A heterophasic polypropylene copolymer having an MFR2 of 0.05 to 20 g/10 min (ISO 1133 at 230° C. with a loading of 2.16 kg) and a melting point (Tm) of 156 to 164° C. (measured by DSC according to ISO 11357) wherein the heterophasic polypropylene copolymer comprises at least the following components: (A) 55.0 to 95.0 wt % of a crystalline fraction (CF) having a comonomer content of 0 to 3.0 wt %; and (B) 5.0 to 45.0 wt % of a soluble fraction (SF) having a comonomer content of 12 to 45 wt %; wherein the intrinsic viscosity (IV) (in decalin at 135° C.) of the soluble fraction (SF) is 2.5 to 11 dl/g, and wherein the amount of crystalline fraction (CF) and the amount of soluble fraction (SF) are determined in 1,2,4-trichlorobenzene at 40° C.

A heterophasic polypropylene copolymer having an MFR2 of 0.05 to 20 g/10 min (ISO 1133 at 230° C. with a loading of 2.16 kg) and a melting point (Tm) of 156 to 164° C. (measured by DSC according to ISO 11357) wherein the heterophasic polypropylene copolymer comprises at least the following components: (A) 55.0 to 95.0 wt % of a crystalline fraction (CF) having a comonomer content of 0 to 3.0 wt %; and (B) 5.0 to 45.0 wt % of a soluble fraction (SF) having a comonomer content of 12 to 45 wt %; wherein the intrinsic viscosity (IV) (in decalin at 135° C.) of the soluble fraction (SF) is 2.5 to 11 dl/g, and wherein the amount of crystalline fraction (CF) and the amount of soluble fraction (SF) are determined in 1,2,4-trichlorobenzene at 40° C.

Disclosed is a composition that can impart a drip preventing effect together with an excellent heat release suppressing effect to a resin, and that enables the resin to exhibit an excellent color tone, by being mixed with the resin. The composition includes a component (A) and/or a component (B), and a component (C). It is preferable that the composition contains the component (C) in an amount of 0.1 to 50 parts by mass relative to 100 parts by mass of a total of the components (A) and (B). The component (A) is a (poly)phosphate compound represented by General Formula (1). ##STR00001## The component (B) is a (poly)phosphate compound represented by General Formula (3). ##STR00002## The component (C) is a hydrous magnesium silicate.

Disclosed is a composition that can impart a drip preventing effect together with an excellent heat release suppressing effect to a resin, and that enables the resin to exhibit an excellent color tone, by being mixed with the resin. The composition includes a component (A) and/or a component (B), and a component (C). It is preferable that the composition contains the component (C) in an amount of 0.1 to 50 parts by mass relative to 100 parts by mass of a total of the components (A) and (B). The component (A) is a (poly)phosphate compound represented by General Formula (1). ##STR00001## The component (B) is a (poly)phosphate compound represented by General Formula (3). ##STR00002## The component (C) is a hydrous magnesium silicate.

Provided is a joined body comprising a first joined member, a second joined member, and a joining layer that joins the first joined member and the second joined member, wherein the first joined member and the second joined member are each independently one selected from the group consisting of a metal member, a polyamide resin member, and a polyolefin resin member, and the joining layer is a layer formed of a resin composition having a co-continuous phase including a continuous phase A farmed of the polyamide resin and a continuous phase B formed of the polyolefin resin and has a dispersed domain a distributed in the continuous phase A, a finely dispersed subdomain a′ distributed in the dispersed domain a, a dispersed domain b distributed in the continuous phase B, and a finely dispersed subdomain b′ distributed in the dispersed domain b.

Provided is a joined body comprising a first joined member, a second joined member, and a joining layer that joins the first joined member and the second joined member, wherein the first joined member and the second joined member are each independently one selected from the group consisting of a metal member, a polyamide resin member, and a polyolefin resin member, and the joining layer is a layer formed of a resin composition having a co-continuous phase including a continuous phase A farmed of the polyamide resin and a continuous phase B formed of the polyolefin resin and has a dispersed domain a distributed in the continuous phase A, a finely dispersed subdomain a′ distributed in the dispersed domain a, a dispersed domain b distributed in the continuous phase B, and a finely dispersed subdomain b′ distributed in the dispersed domain b.

The invention relates to a hot-melt adhesive composition, comprising at least one polyolefin polymer at a content from 5 to 90% by weight; at least one branched polypropylene at a content from 0.1 to 10% by weight; at least one tackifying resin at a content from 0.1 to 60% by weight; optionally, at least one styrene block copolymer from 0 to 30% by weight; optionally, at least one plasticizer at a content from 0 to 30% by weight; optionally, at least one stabilizer at a content from 0 to 5% by weight; and optionally, at least one wax at a content from 0 to 30% by weight. The invention further relates to the use of a branched polypropylene for reducing stringing of a hot-melt adhesive composition.

The invention relates to a hot-melt adhesive composition, comprising at least one polyolefin polymer at a content from 5 to 90% by weight; at least one branched polypropylene at a content from 0.1 to 10% by weight; at least one tackifying resin at a content from 0.1 to 60% by weight; optionally, at least one styrene block copolymer from 0 to 30% by weight; optionally, at least one plasticizer at a content from 0 to 30% by weight; optionally, at least one stabilizer at a content from 0 to 5% by weight; and optionally, at least one wax at a content from 0 to 30% by weight. The invention further relates to the use of a branched polypropylene for reducing stringing of a hot-melt adhesive composition.

Polyolefin composition comprising high density polyethylene, polyolefin elastomer and polypropylene, wherein the polypropylene is selected from homopolymer PP or impact PP and wherein the amount of high density polyethylene is more than 40% by weight of the total amount of high density polyethylene, polyolefin elastomer and impact or homopolymer polypropylene and wherein the total amount of high density polyethylene, polyolefin elastomer and polypropylene is 100% by weight and wherein the high density polyethylene has a density in the range from 940 to 960 kg/m3.

A method capable of stably performing continuous production of a propylene polymer with high productivity while reducing generation of agglomerates is described. In the method, a monomer(s) containing propylene is/are (co)polymerized in a presence of an olefin polymerization catalyst with a polymerization system containing two or more gas phase polymerization reactors or a polymerization system containing a liquid phase polymerization reactor(s) and a gas phase polymerization reactor(s) such that that the total number of liquid phase polymerization reactor(s) and gas phase polymerization reactor(s) is three or more. In at least one gas phase polymerization reactor, an average retention time τ.sub.G [hour] in the gas phase polymerization, an average particle diameter D.sub.pi [μm] of fed powder, and a total amount C.sub.o [wt %] of an ethylene-derived structural unit and C4-C12 α-olefin-derived structural units in a polymer in discharged powder are in a predetermined relationship.