Flexible polypropylene resin
AssigneeIdemitsu Petrochemical Co., Ltd.
InventorsShinichi Yukimasa, Masato Kijima
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Abstract
The present invention relates to a soft polypropylene resin having a melt index falling in a specific range, prepared by melting and kneading a substantial propylene homopolymer or a propylene copolymer composition each having specific properties in the presence of a radical-generating agent. According to the present invention, capable of being provided at a good productivity is a soft polypropylene resin which is useful as an alternative for a polyvinyl chloride resin in the fields of films, sheets, construction materials and the like and which is excellent in fluidity.
Claims20
A soft polypropylene resin having a melt index at a temperature of 230° C. and a load of 21.18N of 1 to 10 g/10 minutes, obtained by melting and kneading, in the presence of a radical-generating agent, a propylene resin composition comprising a substantial propylene homopolymer having a boiling n-heptane-insoluble matter content of 60 to 90% by weight and an intrinsic viscosity of 3 to 6 deciliter/g measured at 135° C. in tetralin.
A soft polypropylene resin having a melt index at a temperature of 230° C. and a load of 21.18N of 1 to 10 g/10 minutes, obtained by melting and kneading, in the presence of a radical-generating agent, a propylene resin composition comprising a propylene copolymer composition comprising 10 to 95% by weight of a homogeneous part comprising a substantial propylene homopolymer and 90 to 5% by weight of a copolymerization part comprising a propylene-ethylene random copolymer, herein the homogeneous part has a boiling n-heptane-insoluble matter content of 60 to 90% by weight and a intrinsic viscosity of 3 to 6 deciliter/g measured at 135° C. in tetralin;
- the copolymerization part comprises 10 to 60% by weight of ethylene;
- and the propylene resin composition has an a intrinsic viscosity of 3 to 6 deciliter/g measured at 135° C. tetralin.
A soft polypropylene resin having a melt index at a temperature of 230° C. and a load of 21.18N of 1 to 10 g/10 minutes, obtained by melting and kneading, in the presence of a radical-generating agent, a propylene resin composition comprising a substantial propylene homopolymer having a boiling n-heptane-insoluble matter content of 60 to 90% by weight and an intrinsic viscosity of 3 to 6 deciliter/g measured at 135° C. in tetralin, wherein the propylene homopolymer is obtained by homopolymerizing propylene in the absence of hydrogen and in the presence of a catalyst comprising solid catalyst comprising magnesium, titanium, a halogen and an electron donating substance;
- triisobutyl aluminum;
- and an alkoxy group-containing aromatic compound.
A soft polypropylene resin having a melt index at a temperature of 230° C. and a load of 21.18N of 1 to 10 g/10 minutes, obtained by melting and kneading, in the presence of a radical-generating agent, a propylene resin composition comprising a propylene copolymer composition comprising 10 to 95% by weight of a homogeneous part comprising a substantial propylene homopolymer and 90 to 5% by weight of a copolymerization part comprising a propylene-ethylene random copolymer, wherein the homogeneous part has a boiling n-heptane-insoluble matter content of 60 to 90% by weight and a intrinsic viscosity of 3 to 6 deciliter/g measured at 135° C. in tetralin;
- the copolymerization part comprises 10 to 60% by weight of ethylene unit;
- and the propylene copolymer composition has an intrinsic viscosity of 3 to 6 deciliter/g measured at 135° C. in tetralin, wherein the propylene copolymer is obtained by copolymerizing ethylene and propylene in the absence of hydrogen and in the presence of a catalyst system comprising a solid catalyst comprising magnesium, titanium, a halogen and an electron donating substance;
- triisobutyl aluminum;
- and an alkoxy group-containing aromatic compound.
A soft polypropylene resin having a melt index at a temperature of 230° C. and a load of 21.18N of 1 to 10 g/10 minutes, obtained by melting and kneading, in the presence of a radical-generating agent, a propylene resin composition comprising a substantial propylene homopolymer having a boiling n-heptane-insoluble matter content of 60 to 90% by weight and an intrinsic viscosity of 3 to 6 deciliter/g measured at 135° C. in tetralin, wherein the propylene homopolymer is obtained by homopolymerizing propylene in the absence of hydrogen and in the presence of a catalyst system comprising a solid catalyst comprising magnesium, titanium, a halogen and an electron donating substance;
- triisobutyl aluminum;
- and an alkoxy group-containing aromatic compound;
- wherein the catalyst system comprises a composition obtained by prepolymerizing propylene in the presence of the solid catalyst and an organic aluminum compound.
A soft polypropylene resin having a melt index at a temperature of 230° C. and a load of 21.18N of 1 to 10 g/10 minutes, obtained by melting and kneading, in the presence of a radical-generating agent, a propylene resin composition comprising a propylene copolymer composition comprising 10 to 95% by weight of a homogeneous part comprising a substantial propylene homopolymer and 90 to 5% by weight of a copolymerization part comprising a propylene-ethylene random copolymer, wherein the homogeneous part has a boiling n-heptane-insoluble matter content of 60 to 90% by weight and an intrinsic viscosity of 3 to 6 deciliter/g measured at 135° C. in tetralin;
- the copolymerization part comprises 10 to 60% by weight of ethylene units;
- and the propylene copolymer composition has an intrinsic viscosity of 3 to 6 deciliter/g measured at 135° C. in tetralin, wherein the propylene copolymer is obtained by copolymerizing ethylene and propylene in the absence of hydrogen and in the presence of a catalyst system comprising a solid catalyst comprising magnesium, titanium, a halogen and an electron donating substance;
- triisobutyl aluminum;
- and an alkoxy group-containing aromatic compound;
- wherein the catalyst system is obtained by prepolymerizing propylene in the presence of the solid catalyst and an organic aluminum compound.
Dependencies are inferred from the claim text.