The present invention relates to a method of producing a magnesium compound represented by the following formula: Mg(OR.sup.1).sub.2-n(Modifier).sub.n wherein R.sup.1 is C.sub.mH.sub.2m+1, where in m is an integer from 2 to 10, and n is 0-2 wherein the method comprises the steps a) providing a mixture comprising magnesium, an initiator and a first alcohol wherein the molar ratio of initiator to magnesium is from 0.0001 to 1; and b) adding a modifier to the mixture obtained in step a) wherein the modifier is selected from the group consisting of alkoxy alcohol, carboxylic acid ester, aliphatic hydrocarbon, aromatic hydrocarbon, ketone, a second alcohol or a mixture thereof, wherein the second alcohol is different from the first alcohol, respective magnesium compound and the use thereof.

A procatalyst for polymerization of olefins, based on a magnesium compound of the formula MgRR wherein R is an alkoxide or aryloxide group and R is an alkoxide or aryloxide group or halogen that has been reacted with a tetravalent titanium halide, an activator being a monoester and an internal donor of formula B: ##STR00001##
as described herein. Also described is a polymerization catalyst system comprising the procatalyst, a co-catalyst and optionally an external electron donor; a process of making a polyolefin by contacting an olefin with the catalyst system; a polyolefinobtained by or obtainable by the process; and a polyolefin, preferably a polypropylene, having a molecular weight distribution of between 3 and 15, a molecular weight (M.sub.w) of between 200,000 to 1,000,000 g/mol, a melting temperature of more than 145 C., a value for the xylene solubles of less than 4 wt. % and a shaped article therefrom.

A procatalyst for polymerization of olefins, based on a magnesium compound of the formula MgRR wherein R is an alkoxide or aryloxide group and R is an alkoxide or aryloxide group or halogen that has been reacted with a tetravalent titanium halide, an activator being a monoester and an internal donor of formula B: ##STR00001##
as described herein. Also described is a polymerization catalyst system comprising the procatalyst, a co-catalyst and optionally an external electron donor; a process of making a polyolefin by contacting an olefin with the catalyst system; a polyolefinobtained by or obtainable by the process; and a polyolefin, preferably a polypropylene, having a molecular weight distribution of between 3 and 15, a molecular weight (M.sub.w) of between 200,000 to 1,000,000 g/mol, a melting temperature of more than 145 C., a value for the xylene solubles of less than 4 wt. % and a shaped article therefrom.

The invention relates to a production method of a heterophasic propylene polymerization material containing a propylene homopolymer (I-1) or a propylene copolymer (I-2), and a propylene copolymer (II), wherein the content of the propylene copolymer component (II) is 30% by weight or more, the production method containing the following steps (1) and (2): Step (1): a step of polymerizing a monomer containing propylene in the presence of a catalyst for propylene polymerization to produce a propylene homopolymer (I-1) or a propylene copolymer (I-2), the step satisfying the formula (A):
1100(1.34).sup.1/3(A)
wherein, represents the median diameter (unit: m) of the catalyst for propylene polymerization and represents the production amount (unit: g/g) of the propylene homopolymer (I-1) or the propylene copolymer (I-2) per 1 g of the catalyst for propylene polymerization in the step (1); Step (2): a step of copolymerizing at least one olefin selected from the group consisting of ethylene and -olefins having the number of carbon atoms of 4 or more and 12 or less, and propylene in the presence of the propylene homopolymer (I-1) or the propylene copolymer (I-2) obtained in the step (1), using 1 or more gas phase polymerization reactors, to produce a propylene copolymer (II), wherein the concentration of alkanes having the number of carbon atoms of 6 or more in the final gas phase polymerization reactor of the 1 or more gas phase polymerization reactors is 0.01% by volume or more and 0.6% by volume or less.

The invention relates to a production method of a heterophasic propylene polymerization material containing a propylene homopolymer (I-1) or a propylene copolymer (I-2), and a propylene copolymer (II), wherein the content of the propylene copolymer component (II) is 30% by weight or more, the production method containing the following steps (1) and (2): Step (1): a step of polymerizing a monomer containing propylene in the presence of a catalyst for propylene polymerization to produce a propylene homopolymer (I-1) or a propylene copolymer (I-2), the step satisfying the formula (A):
1100(1.34).sup.1/3(A)
wherein, represents the median diameter (unit: m) of the catalyst for propylene polymerization and represents the production amount (unit: g/g) of the propylene homopolymer (I-1) or the propylene copolymer (I-2) per 1 g of the catalyst for propylene polymerization in the step (1); Step (2): a step of copolymerizing at least one olefin selected from the group consisting of ethylene and -olefins having the number of carbon atoms of 4 or more and 12 or less, and propylene in the presence of the propylene homopolymer (I-1) or the propylene copolymer (I-2) obtained in the step (1), using 1 or more gas phase polymerization reactors, to produce a propylene copolymer (II), wherein the concentration of alkanes having the number of carbon atoms of 6 or more in the final gas phase polymerization reactor of the 1 or more gas phase polymerization reactors is 0.01% by volume or more and 0.6% by volume or less.

The present disclosure relates to a solid catalyst for propylene polymerization and a process for manufacture of a propylene polymer or copolymer using the solid catalyst, and provides a solid catalyst including carriers produced via a reaction between dialkoxy magnesium and metal halide, titanium halide, an organic electron donor, etc. and a process of manufacture of a propylene-based block copolymer via copolymerization of propylene--olefin using the solid catalyst. Particularly, internal electron donors including an ester group and an alkoxy group are used as two kinds of organic electron donors used in the present disclosure, and, thus, a block copolymer having high activity and excellent stereoregularity and a high rubber content via copolymerization with -olefin can be produced using a solid catalyst system suggested in the present disclosure.

The present disclosure relates to a solid catalyst for propylene polymerization and a process for manufacture of a propylene polymer or copolymer using the solid catalyst, and provides a solid catalyst including carriers produced via a reaction between dialkoxy magnesium and metal halide, titanium halide, an organic electron donor, etc. and a process of manufacture of a propylene-based block copolymer via copolymerization of propylene--olefin using the solid catalyst. Particularly, internal electron donors including an ester group and an alkoxy group are used as two kinds of organic electron donors used in the present disclosure, and, thus, a block copolymer having high activity and excellent stereoregularity and a high rubber content via copolymerization with -olefin can be produced using a solid catalyst system suggested in the present disclosure.

A heterophasic propylene polymerization material containing a propylene homopolymer component or a specific propylene copolymer component, and a specific ethylene--olefin copolymer component, in which (i) the amount of the xylene-soluble component is 40% by weight or more, (ii) the limiting viscosity [].sub.C X I S of the xylene-insoluble component is 1.50 dL/g or more, (iii) the ratio of the limiting viscosity [].sub.C X S of the xylene-soluble component to the limiting viscosity [].sub.C X I S of the xylene-insoluble component is 1.5 or less, and (iv) the content of monomer units derived from ethylene and -olefins having 4 to 12 carbon atoms in the xylene-insoluble component is 6% by weight or more.

A heterophasic propylene polymerization material containing a propylene homopolymer component or a specific propylene copolymer component, and a specific ethylene--olefin copolymer component, in which (i) the amount of the xylene-soluble component is 40% by weight or more, (ii) the limiting viscosity [].sub.C X I S of the xylene-insoluble component is 1.50 dL/g or more, (iii) the ratio of the limiting viscosity [].sub.C X S of the xylene-soluble component to the limiting viscosity [].sub.C X I S of the xylene-insoluble component is 1.5 or less, and (iv) the content of monomer units derived from ethylene and -olefins having 4 to 12 carbon atoms in the xylene-insoluble component is 6% by weight or more.

The present invention relates to Ziegler-Natta catalyst components for olefin polymerization employing specific carbonate compounds as an element of solid catalyst composition in conjunction with at least one or more internal donor compounds, for producing polyolefins, particularly polypropylene and ethylene-propylene block co-polymer, which exhibits substantially high rubber content with higher stereo-regularity and hydrogen response.