A solid catalyst component for the polymerization of olefins made from or containing Mg, Ti, halogen and an electron donor of formula (I) or (II): ##STR00001##
When activated with an aluminum alkyl and optionally an external electron donor, the solid catalyst component can give high activity and stereospecificity in the polymerization of olefins.

A solid catalyst component for the polymerization of olefins made from or containing Mg, Ti, halogen and an electron donor of formula (I) or (II) ##STR00001## When activated with an aluminum alkyl and optionally an external electron donor, solid catalyst component can give high activity and stereospecificity in the polymerization of olefins.

The present disclosure relates to a catalyst component for the polymerization of olefins comprising Mg. Ti and an electron donor such as mercaptoester derivatives of the general formula (I). ##STR00001##
in which Z is selected from C, Si, O, N, S or P, with the proviso that the atoms O, S, P and N are not directly linked to either the carboxylic group or the sulfur atom of formula (I), the R.sup.2 groups, equal to or different from each other, are selected from hydrogen or a C.sub.1-C.sub.20 hydrocarbon radicals, optionally containing a heteroatom selected from halogen, P, S, N, O and Si, which can be fused together to form one or more cycles, m is a number satisfying the valences of Z and n is an integer ranging from 1 to 10, X is O or S, Y is OR.sup.3, NR.sup.4R.sup.5) or R.sup.6 groups in which R.sup.1 and R.sup.3 are selected from C.sub.1-C.sub.15 hydrocarbon groups, optionally containing a heteroatom selected from halogen, P, S, N, O, and Si, R.sup.4-R.sup.5 groups, independently, are hydrogen or R.sup.1 groups, and R.sup.6 groups have the same composition as R.sup.1 groups.

Catalyst systems with single site transition metal complexes (such as quinolinyldiamide transition metal complexes), an activator, and a metal hydrocarbenyl transfer agent (preferably an aluminum vinyl-transfer agent) are disclosed for use in alkene polymerization.

The invention relates to a process for preparing a catalyst system suitable for olefin polymerization. The present invention further relates to a catalyst system obtainable by such process. In addition, the invention relates to a polyolefin. The invention also relates to ashaped article. The catalyst system comprises a procatalyst, a co-catalyst and optionally at least one external electron donor.

The invention relates to a process for preparing a catalyst system suitable for olefin polymerization. The present invention further relates to a catalyst system obtainable by such process. In addition, the invention relates to a polyolefin. The invention also relates to ashaped article. The catalyst system comprises a procatalyst, a co-catalyst and optionally at least one external electron donor.

A solid catalyst component for the polymerization of olefins made from or containing Mg, Ti, halogen and an electron donor of formula (I) or (II)

##STR00001##

When activated with an aluminum alkyl and optionally an external electron donor, solid catalyst component can give high activity and stereospecificity in the polymerization of olefins.

A solid catalyst component for the polymerization of olefins made from or containing Mg, Ti, halogen and an electron donor of formula (I) or (II):

##STR00001##

When activated with an aluminum alkyl and optionally an external electron donor, the solid catalyst component can give high activity and stereospecificity in the polymerization of olefins.

The present disclosure relates to a catalyst component for the polymerization of olefins comprising Mg. Ti and an electron donor such as mercaptoester derivatives of the general formula (I).

##STR00001##

in which Z is selected from C, Si, O, N, S or P, with the proviso that the atoms O, S, P and N are not directly linked to either the carboxylic group or the sulfur atom of formula (I), the R.sup.2 groups, equal to or different from each other, are selected from hydrogen or a C.sub.1-C.sub.20 hydrocarbon radicals, optionally containing a heteroatom selected from halogen, P, S, N, O and Si, which can be fused together to form one or more cycles, m is a number satisfying the valences of Z and n is an integer ranging from 1 to 10, X is O or S, Y is OR.sup.3, NR.sup.4R.sup.5) or R.sup.6 groups in which R.sup.1 and R.sup.3 are selected from C.sub.1-C.sub.15 hydrocarbon groups, optionally containing a heteroatom selected from halogen, P, S, N, O, and Si, R.sup.4-R.sup.5 groups, independently, are hydrogen or R.sup.1 groups, and R.sup.6 groups have the same composition as R.sup.1 groups.

A catalyst system including a procatalyst, a co-catalyst and an external electron donor of Formula I:
Si(L).sub.n(OR.sup.11).sub.4-n-m(R.sup.12).sub.mFormula I wherein, Si has a valency 4+; O has a valency 2 and O is bonded to Si via a silicon-oxygen bond; n is 1-4; m is 0-3; n+m4; each R.sup.11 and R.sup.12 group is independently an alkyl or aromatic substituted or unsubstituted hydrocarbyl;
each L group is independently of Formula II: ##STR00001## wherein, L is bonded to the silicon atom via the nitrogen-silicon bond; L has a single substituent on the nitrogen atom, where this single substituent is an imine carbon atom; and X and Y are independently a hydrogen atom; a heteroatom of Groups 13-17; an alkyl, optionally containing a heteroatom of Groups 13-17 or an aromatic substituted and unsubstituted hydrocarbyl, optionally containing a heteroatom of Groups 13-17.