Means for solving the problems The thermoplastic resin composition (X1) of the present invention comprises (A1), (B1), (C1), and optionally (D1) below: 1 to 90 wt % of an isotactic polypropylene (A1); 9 to 98 wt % of a propylene/ethylene/-olefin copolymer (B1) containing 45 to 89 mol % of propylene-derived structural units, 10 to 25 mol % of ethylene-derived structural units, and optionally, 0 to 30 mol % of C.sub.4-C.sub.20 -olefin-derived structural units (a1); 1 to 80 wt % of a styrene-based elastomer (C1); and 0 to 70 wt % of an ethylene/-olefin copolymer (D1) whose density is in the range of 0.850 to 0.910 g/cm.sup.3, wherein (A1)+(B1)+(C1)+(D1)=100 wt %.

A multi-component ionomer, wherein, in a multi-component copolymer (D) comprising, as essential constitutional units, a structural unit (A) derived from at least one selected from the group consisting of ethylene and an -olefin containing 3 to 20 carbon atoms, a structural unit (B) derived from a monomer containing at least one selected from the group consisting of a carboxy group and a dicarboxylic anhydride group, and a structural unit (C) derived from a specific acyclic monomer, at least a part of at least one selected from the group consisting of a carboxy group and a dicarboxylic anhydride group of the structural unit (B) is converted into a specific metal-containing carboxylate, and wherein a phase angle at which an absolute value G* of a complex modulus measured with a rotational rheometer is 0.1 MPa (G*=0.1 MPa) is from 50 degrees to 75 degrees.

A monophasic bimodal propylene/ethylene/1-butene random terpolymer composition (PP) comprising: a) 40 to 90 wt.-% of a first random terpolymer fraction (PP1), having a C2 content in the range from 0.3 to 3.0 mol-%, and a C4 content in the range from 1.0 to 5.0 mol-%; and b) 10 to 60 wt.-% of a second random terpolymer fraction (PP2), having a C2 content in the range from 3.0 to 7.0 mol-%, and a C4 content in the range from 2.0 to 6.0 mol-%, having: i) a C2 content in the range from 1.0 to 4.0 mol-%; ii) a C4 content in the range from 1.5 to 4.5 mol-%; iii) an MFR2 in the range from 3.0 to 10 g/10 min; and iv) a content of 2,1-regiodefects in the range from 0.1 to 1.5 mol %.

A monophasic bimodal propylene/ethylene/1-butene random terpolymer composition (PP) comprising: a) 40 to 90 wt.-% of a first random terpolymer fraction (PP1), having a C2 content in the range from 0.3 to 3.0 mol-%, and a C4 content in the range from 1.0 to 5.0 mol-%; and b) 10 to 60 wt.-% of a second random terpolymer fraction (PP2), having a C2 content in the range from 3.0 to 7.0 mol-%, and a C4 content in the range from 2.0 to 6.0 mol-%, having: i) a C2 content in the range from 1.0 to 4.0 mol-%; ii) a C4 content in the range from 1.5 to 4.5 mol-%; iii) an MFR2 in the range from 3.0 to 10 g/10 min; and iv) a content of 2,1-regiodefects in the range from 0.1 to 1.5 mol %.

Means for solving the problems The thermoplastic resin composition (X1) of the present invention comprises (A1), (B1), (C1), and optionally (D1) below: 1 to 90 wt % of an isotactic polypropylene (A1); 9 to 98 wt % of a propylene/ethylene/-olefin copolymer (B1) containing 45 to 89 mol % of propylene-derived structural units, 10 to 25 mol % of ethylene-derived structural units, and optionally, 0 to 30 mol % of C.sub.4-C.sub.20 -olefin-derived structural units (a1); 1 to 80 wt % of a styrene-based elastomer (C1); and 0 to 70 wt % of an ethylene/-olefin copolymer (D1) whose density is in the range of 0.850 to 0.910 g/cm.sup.3, wherein (A1)+(B1)+(C1)+(D1)=100 wt %.

Means for solving the problems The thermoplastic resin composition (X1) of the present invention comprises (A1), (B1), (C1), and optionally (D1) below: 1 to 90 wt % of an isotactic polypropylene (A1); 9 to 98 wt % of a propylene/ethylene/-olefin copolymer (B1) containing 45 to 89 mol % of propylene-derived structural units, 10 to 25 mol % of ethylene-derived structural units, and optionally, 0 to 30 mol % of C.sub.4-C.sub.20 -olefin-derived structural units (a1); 1 to 80 wt % of a styrene-based elastomer (C1); and 0 to 70 wt % of an ethylene/-olefin copolymer (D1) whose density is in the range of 0.850 to 0.910 g/cm.sup.3, wherein (A1)+(B1)+(C1)+(D1)=100 wt %.

Cast film made from terpolymers, and terpolymers containing units derived from propylene, ethylene and 1-butene.

The present invention relates to a high-melt-strength polypropylene resin, and a preparation method therefor. A method for preparing the high-melt-strength polypropylene resin, according to the present invention, comprises the steps of: creating a polypropylene by polymerizing propylene monomers in the presence of a metallocene catalyst; and putting a diene compound and a comonomer into the created polypropylene and unreacted propylene monomers and reacting same, thereby forming a C40 or greater long-chain branch on the main chain of the polypropylene.

The present invention relates to a high-melt-strength polypropylene resin, and a preparation method therefor. A method for preparing the high-melt-strength polypropylene resin, according to the present invention, comprises the steps of: creating a polypropylene by polymerizing propylene monomers in the presence of a metallocene catalyst; and putting a diene compound and a comonomer into the created polypropylene and unreacted propylene monomers and reacting same, thereby forming a C40 or greater long-chain branch on the main chain of the polypropylene.

A terpolymer of ethylene, of a first 1,3-diene having from 4 to 6 carbon atoms and of a second 1,3-diene of formula CH.sub.2CR-CHCH.sub.2 is provided. The terpolymer contains more than 50 mol % of ethylene units and at least 1 mol % of units of the second 1,3-diene, the symbol R representing a hydrocarbon chain having from 3 to 20 carbon atoms. Such a polymer gives an improved compromise between its ethylene content, its stiffness and its degree of crystallinity for use in tires.