CATALYST SYSTEM FOR POLYMERIZATION OF AN OLEFIN
First Claim
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1. A process for preparing a catalyst system for olefin polymerization, said catalyst system comprising a procatalyst, a co-catalyst and optionally at least one external electron donor said process comprising:
- A) providing said procatalyst obtained via a process comprising;
i) contacting a compound R4zMgX42-z with an alkoxy- or aryloxy-containing silane compound to give a first intermediate reaction product, being a solid Mg(OR1)xX12-x, wherein;
R4 is the same as R1 being a linear, branched or cyclic hydrocarbyl group independently selected from alkyl, alkenyl, aryl, aralkyl, or alkylaryl groups, and one or more combinations thereof;
wherein said hydrocarbyl group is substituted or unsubstituted, and optionally comprises one or more heteroatoms;
X4 and X1 are each independently selected from the group of consisting of fluoride (F−
), chloride (Cl−
), bromide (Br−
) or iodide (I−
);
z is in a range of larger than 0 and smaller than 2, being 0<
z<
2;
ii) optionally contacting the solid Mg(OR1)xX12-x obtained in step i) with at least one activating compound selected from the group formed by activating electron donors and metal alkoxide compounds of formula M1(OR2)v-w(OR3)w or M2(OR2)v-w(R3)w, to obtain a second intermediate product;
wherein;
M1 is a metal selected from the group consisting of Ti, Zr, Hf, Al or Si;
M2 is a metal being Si;
v is the valency of M1 or M2;
R2 and R3 are each a linear, branched or cyclic hydrocarbyl group independently selected from alkyl, alkenyl, aryl, aralkyl, alkoxycarbonyl or alkylaryl groups, and one or more combinations thereof;
wherein said hydrocarbyl group is substituted or unsubstituted, and optionally comprises one or more heteroatoms;
iii) contacting the first or second intermediate reaction product, obtained respectively in step i) or ii), with a halogen-containing Ti-compound and an internal electron donor to obtain said procatalyst;
B) contacting said procatalyst with a co-catalyst; and
optionally at least one external donor;
characterized in that said internal and/or external electron donor is an N-containing donor.
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Abstract
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 polyolefm. The invention also relates to ashaped article. The catalyst system comprises a procatalyst, a co-catalyst and optionally at least one external electron donor.
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Citations
20 Claims
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1. A process for preparing a catalyst system for olefin polymerization, said catalyst system comprising a procatalyst, a co-catalyst and optionally at least one external electron donor said process comprising:
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A) providing said procatalyst obtained via a process comprising; i) contacting a compound R4zMgX42-z with an alkoxy- or aryloxy-containing silane compound to give a first intermediate reaction product, being a solid Mg(OR1)xX12-x, wherein;
R4 is the same as R1 being a linear, branched or cyclic hydrocarbyl group independently selected from alkyl, alkenyl, aryl, aralkyl, or alkylaryl groups, and one or more combinations thereof;
wherein said hydrocarbyl group is substituted or unsubstituted, and optionally comprises one or more heteroatoms;
X4 and X1 are each independently selected from the group of consisting of fluoride (F−
), chloride (Cl−
), bromide (Br−
) or iodide (I−
);
z is in a range of larger than 0 and smaller than 2, being 0<
z<
2;ii) optionally contacting the solid Mg(OR1)xX12-x obtained in step i) with at least one activating compound selected from the group formed by activating electron donors and metal alkoxide compounds of formula M1(OR2)v-w(OR3)w or M2(OR2)v-w(R3)w, to obtain a second intermediate product;
wherein;
M1 is a metal selected from the group consisting of Ti, Zr, Hf, Al or Si;
M2 is a metal being Si;
v is the valency of M1 or M2;
R2 and R3 are each a linear, branched or cyclic hydrocarbyl group independently selected from alkyl, alkenyl, aryl, aralkyl, alkoxycarbonyl or alkylaryl groups, and one or more combinations thereof;
wherein said hydrocarbyl group is substituted or unsubstituted, and optionally comprises one or more heteroatoms;iii) contacting the first or second intermediate reaction product, obtained respectively in step i) or ii), with a halogen-containing Ti-compound and an internal electron donor to obtain said procatalyst; B) contacting said procatalyst with a co-catalyst; and
optionally at least one external donor;
characterized in that said internal and/or external electron donor is an N-containing donor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification