The present disclosure relates to a propylene ethylene copolymer comprising: an ethylene content of between 1.8 and 10.0% by weight; a molecular weight distribution (MWD), expressed in terms of Mw/Mn, greater than 4.0; a content of xylene soluble fraction (XS) and ethylene content (C2) that fulfills the following relationship:
XS<(C22.1)2.4
where: XS=% by weight of the fraction soluble in xylene at 25 C.; and C2=% by weight of ethylene units in the copolymer as determined via NMR.

The present disclosure relates to a propylene ethylene copolymer comprising: an ethylene content of between 1.8 and 10.0% by weight; a molecular weight distribution (MWD), expressed in terms of Mw/Mn, greater than 4.0; a content of xylene soluble fraction (XS) and ethylene content (C2) that fulfills the following relationship:
XS<(C22.1)2.4
where: XS=% by weight of the fraction soluble in xylene at 25 C.; and C2=% by weight of ethylene units in the copolymer as determined via NMR.

The present disclosure relates to a solid catalyst component for the (co)polymerization of olefins CH.sub.2?CHR, in which R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, comprising Ti, Mg, and Cl, and optionally an electron donor compound selected from the group consisting of ethers, amines, silanes, carbamates ketones, esters of aliphatic acids, alkyl and aryl esters of optionally substituted aromatic polycarboxylic acids, diol derivatives chosen among monoesters monocarbamates and monoesters monocarbonates or mixtures thereof, comprising from 0.1 to 50% wt of Bi with respect to the total weight of the solid catalyst component.

The present disclosure relates to a solid catalyst component for the (co)polymerization of olefins CH.sub.2?CHR, in which R is hydrogen or a hydrocarbyl radical with 1-12 carbon atoms, comprising Ti, Mg, and Cl, and optionally an electron donor compound selected from the group consisting of ethers, amines, silanes, carbamates ketones, esters of aliphatic acids, alkyl and aryl esters of optionally substituted aromatic polycarboxylic acids, diol derivatives chosen among monoesters monocarbamates and monoesters monocarbonates or mixtures thereof, comprising from 0.1 to 50% wt of Bi with respect to the total weight of the solid catalyst component.

A process may include contacting ethylene monomer with Ziegler-Natta catalyst to form polyethylene. The Ziegler-Natta catalyst may be formed by contacting an alkyl magnesium compound with an alcohol and a metal reagent to form a blend, and contacting the blend with a first agent to form a solution of reaction product A. The solution of reaction product A may be contacted with a second agent to form a solid reaction product B, and the solid reaction product B may be contacted with a third agent to form a solid reaction product C. The solid reaction product C may be contacted with a fourth agent to form a solid reaction product D, and the solid reaction product D may be contacted with a fifth agent to form a catalyst component.

A process may include contacting ethylene monomer with Ziegler-Natta catalyst to form polyethylene. The Ziegler-Natta catalyst may be formed by contacting an alkyl magnesium compound with an alcohol and a metal reagent to form a blend, and contacting the blend with a first agent to form a solution of reaction product A. The solution of reaction product A may be contacted with a second agent to form a solid reaction product B, and the solid reaction product B may be contacted with a third agent to form a solid reaction product C. The solid reaction product C may be contacted with a fourth agent to form a solid reaction product D, and the solid reaction product D may be contacted with a fifth agent to form a catalyst component.

A process for preparing a solid catalyst component for the homopolymerization or copolymerization of CH.sub.2CHR olefins, wherein R is hydrogen or hydrocarbyl radical with 1-12 carbon atoms, including a step (a), at a temperature ranging from 0 to 150 C., of reacting a Mg based compound of formula (MgCl.sub.mX.sub.2-m).nLB, wherein m ranges from 0 to 2, n ranges from 0 to 6, X is, independently R.sup.1, OR.sup.1, OCOR.sup.1 or OC(O)OR.sup.1 group, wherein R.sup.1 is a C.sub.1-C.sub.20 hydrocarbon group and LB is a Lewis base with a liquid medium made from or containing a Ti compound, having a TiCl bond, in an amount such that the Ti/Mg molar ratio is higher than 3 and a Bi compound dissolved or dispersed in the liquid medium, wherein the solid catalyst compound is made from or contains the Ti compound, the Bi compound and optionally an electron donor on a Mg chloride based support.

A process for preparing a solid catalyst component for the homopolymerization or copolymerization of CH.sub.2CHR olefins, wherein R is hydrogen or hydrocarbyl radical with 1-12 carbon atoms, including a step (a), at a temperature ranging from 0 to 150 C., of reacting a Mg based compound of formula (MgCl.sub.mX.sub.2-m).nLB, wherein m ranges from 0 to 2, n ranges from 0 to 6, X is, independently R.sup.1, OR.sup.1, OCOR.sup.1 or OC(O)OR.sup.1 group, wherein R.sup.1 is a C.sub.1-C.sub.20 hydrocarbon group and LB is a Lewis base with a liquid medium made from or containing a Ti compound, having a TiCl bond, in an amount such that the Ti/Mg molar ratio is higher than 3 and a Bi compound dissolved or dispersed in the liquid medium, wherein the solid catalyst compound is made from or contains the Ti compound, the Bi compound and optionally an electron donor on a Mg chloride based support.

A polyolefin composition made from or containing:

A) from about 19 wt % to about 50 wt % of a propylene ethylene copolymer having an ethylene derived units content ranging from about 1.5 wt % to about 6.0 wt %

B) from about 50 wt % to about 81 wt % of a propylene ethylene 1-butene terpolymer having an ethylene derived units content ranging from about 1.5 wt % to about 6.0 wt % and 1-butene derived units content between about 4.8 wt % and about 12.4 wt %;

the sum of the amount of component A) and B) being 100;

the polyolefin composition being characterized by the following features: molecular weight distribution (MWD), expressed in terms of Mw/Mn, greater than about 4.0; the creep and recovery curve measured on the polymer fuse at 200? C. shows a maximum value between 600 and 1200 seconds, lower than about 53?10.sup.?4 l/Pa.

A polyolefin composition made from or containing:

A) from about 19 wt % to about 50 wt % of a propylene ethylene copolymer having an ethylene derived units content ranging from about 1.5 wt % to about 6.0 wt %

B) from about 50 wt % to about 81 wt % of a propylene ethylene 1-butene terpolymer having an ethylene derived units content ranging from about 1.5 wt % to about 6.0 wt % and 1-butene derived units content between about 4.8 wt % and about 12.4 wt %;

the sum of the amount of component A) and B) being 100;

the polyolefin composition being characterized by the following features: molecular weight distribution (MWD), expressed in terms of Mw/Mn, greater than about 4.0; the creep and recovery curve measured on the polymer fuse at 200? C. shows a maximum value between 600 and 1200 seconds, lower than about 53?10.sup.?4 l/Pa.