The present disclosure provides an article of manufacture made from or containing a propylene-based terpolymer, having (i) ethylene-derived units in the range from about 0.5 wt. % to about 1.8 wt. %; (ii) 1-butene-derived units in the range from about 1.5 wt. % to about 2.5 wt. %; (iii) a ratio of C.sub.2 wt %/C.sub.4 wt % in the range from about 0.40 to about 0.80, wherein C.sub.2 wt % is the weight percent of ethylene-derived units and C.sub.4 wt % is the weight percent of 1-butene-derived units; (iv) a melt flow rate in the range from about 30 g/10 min to about 80 g/10 min; (v) a xylene soluble fraction at 25 C. lower than about 5.0 wt. %; and (vi) a melting point higher than about 140 C. The article can be a container, which can be used for food applications.

A Ziegler-Natta catalyst component precursor made from or containing a mechanical mixture of (a) distinct particles of adducts of formula MgCl.sub.2(R.sup.1OH).sub.n where R is a C.sub.1-C.sub.8 alkyl group and n is from 0.2 to 6 having average particle size (P50a) ranging from 5 to 100 m; and (b) from 0.2 to 5.0% by weight of distinct particles of a solid compound containing more than 50% by weight of Sift units and having average particle size (P50b), wherein the ratio P50b/P50a ranges from 0.4 to 1.5.

A polypropylene composition made from or containing: A) from 88.0 wt. % to 98.0 wt. %, of a random copolymer of propylene containing from 0.8 wt. % to 4.8 wt. % of 1-hexene derived units; the random copolymer of propylene having: a Melt Flow Rate: measured according to ISO 1133 (230 C., 5 Kg) ranging from 0.5 to 4.4 g/10 min; and B) from 2.0 wt. % to 12.0 wt. % of a terpolymer of propylene ethylene and 1-hexene having a content of ethylene derived units ranging from 35 wt. % to 60 wt.; and a content of 1-hexene derived units ranging from 1 wt. % to 6 wt. %; wherein the polypropylene composition has a Melt Flow Rate: measured according to ISO 1133 (230 C., 5 Kg) ranging from 0.5 to 5.0 g/10 min.

A polypropylene composition made from or containing: A) from 88.0 wt. % to 98.0 wt. %, of a random copolymer of propylene containing from 0.8 wt. % to 4.8 wt. % of 1-hexene derived units; the random copolymer of propylene having: a Melt Flow Rate: measured according to ISO 1133 (230 C., 5 Kg) ranging from 0.5 to 4.4 g/10 min; and B) from 2.0 wt. % to 12.0 wt. % of a terpolymer of propylene ethylene and 1-hexene having a content of ethylene derived units ranging from 35 wt. % to 60 wt.; and a content of 1-hexene derived units ranging from 1 wt. % to 6 wt. %; wherein the polypropylene composition has a Melt Flow Rate: measured according to ISO 1133 (230 C., 5 Kg) ranging from 0.5 to 5.0 g/10 min.

A method for producing a propylene-based block copolymer produces a propylene-based copolymer that exhibits excellent stereoregularity, rigidity, and impact resistance in a convenient and efficient manner while achieving high polymerization activity. The method for producing a propylene-based block copolymer includes bringing a catalyst into contact with propylene, or propylene and an -olefin, and bringing an electron donor compound into contact with the resulting product to produce a propylene-based block copolymer, the catalyst including a solid catalyst component that includes titanium, magnesium, a halogen, and an internal electron donor compound, a specific organoaluminum compound, and a specific external electron donor compound.

A method for producing a propylene-based block copolymer produces a propylene-based copolymer that exhibits excellent stereoregularity, rigidity, and impact resistance in a convenient and efficient manner while achieving high polymerization activity. The method for producing a propylene-based block copolymer includes bringing a catalyst into contact with propylene, or propylene and an -olefin, and bringing an electron donor compound into contact with the resulting product to produce a propylene-based block copolymer, the catalyst including a solid catalyst component that includes titanium, magnesium, a halogen, and an internal electron donor compound, a specific organoaluminum compound, and a specific external electron donor compound.

A method for producing a propylene-based block copolymer produces a propylene-based copolymer that exhibits excellent stereoregularity, rigidity, and impact resistance in a convenient and efficient manner while achieving high polymerization activity. The method for producing a propylene-based block copolymer includes bringing a catalyst into contact with propylene, or propylene and an -olefin, and bringing an electron donor compound into contact with the resulting product to produce a propylene-based block copolymer, the catalyst including a solid catalyst component that includes titanium, magnesium, a halogen, and an internal electron donor compound, a specific organoaluminum compound, and a specific external electron donor compound.

A method for producing a propylene-based block copolymer produces a propylene-based copolymer that exhibits excellent stereoregularity, rigidity, and impact resistance in a convenient and efficient manner while achieving high polymerization activity. The method for producing a propylene-based block copolymer includes bringing a catalyst into contact with propylene, or propylene and an -olefin, and bringing an electron donor compound into contact with the resulting product to produce a propylene-based block copolymer, the catalyst including a solid catalyst component that includes titanium, magnesium, a halogen, and an internal electron donor compound, a specific organoaluminum compound, and a specific external electron donor compound.

The present disclosure provides a solid catalyst component obtainable by a process including: (a) a first step in which Ti(OEt).sub.4, is reacted with a Mg based compound of formula MgCl.sub.n(OR.sup.I).sub.2-n, where n is from about 0.5 to about 1.5, R.sup.I is a C.sub.1-C.sub.10 alkyl groups, the Ti(OEt).sub.4 and the Mg compound are used in amounts such that the Ti/Mg molar ratio is of about 0.2 to about 0.4, the reaction temperature is about 110 to about 130 C., and the reaction time is about 2 to about 5 hours; and (b) a subsequent step in which the product obtained in step (a) is reacted with a Ti compound of the formula Ti(OR.sup.I).sub.4-yCl.sub.y, where y is a number between 3 and 4.

The present disclosure provides a solid catalyst component obtainable by a process including: (a) a first step in which Ti(OEt).sub.4, is reacted with a Mg based compound of formula MgCl.sub.n(OR.sup.I).sub.2-n, where n is from about 0.5 to about 1.5, R.sup.I is a C.sub.1-C.sub.10 alkyl groups, the Ti(OEt).sub.4 and the Mg compound are used in amounts such that the Ti/Mg molar ratio is of about 0.2 to about 0.4, the reaction temperature is about 110 to about 130 C., and the reaction time is about 2 to about 5 hours; and (b) a subsequent step in which the product obtained in step (a) is reacted with a Ti compound of the formula Ti(OR.sup.I).sub.4-yCl.sub.y, where y is a number between 3 and 4.