Patent ID: 11879026
Assignee: SABIC GLOBAL TECHNOLOGIES B.V.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  F | IPC C  F

Claim 13:
14. A process for the preparation of the polypropylene composition according to claim 1, comprising a step of polymerizing propylene, ethylene and 1-hexene in the presence of a Ziegler-Natta catalyst system to obtain the terpolymer,
wherein the Ziegler-Natta catalyst system comprises a procatalyst, a co-catalyst and optionally an external electron donor, wherein the procatalyst is obtained by a process comprising the steps of
Step A) providing or preparing a compound R4zMgX42-z wherein
each occurrence of R4 is independently selected from 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 contains one or more heteroatoms;
each occurrence of X4 is independently selected from the group consisting of fluoride (F—), chloride (Cl—), bromide (Br—) and iodide (I—);
z is larger than 0 and smaller than 2, being 0<z<2;

Step B) contacting the compound R4zMgX42-z with a silane compound Si(OR5)4-n(R6)n to give a first intermediate reaction product, being a solid Mg(OR5)xX12-x wherein
R5 and R6 are each independently selected from 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 contains one or more heteroatoms;
each occurrence of X1 is independently selected from the group consisting of fluoride (F—), chloride (Cl—), bromide (Br—) and iodide (I—);
n is 0 to 4;
z is larger than 0 and smaller than 2, being 0<z<2;
x is larger than 0 and smaller than 2, being 0<x<2;

Step C) activating said first intermediate reaction product, comprising two sub steps:
Step C1) a first activation step comprising contacting the first intermediate reaction product obtained in step B) with at least one first activating compound which is a metal alkoxide compound of formula M1(OR2)v-w(OR3)w or M2(OR2)v-w(R3)w to provide a partially activated solid support; wherein: M1 is a metal selected from the group consisting of Ti, Zr, Hf, Al and Si; M2 is Si; v is a valency of M1 or M2 and w is smaller than v; 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 contains one or more heteroatoms; and a second activating compound which is a first activating electron donor; and
Step C2) a second activation step comprising contacting the partially activated solid support obtained in step C1) with second activating electron donor; to obtain a second intermediate reaction product;

Step D) reacting the second intermediate reaction product obtained from step C2) with a halogen-containing Ti-compound, at least one internal electron donor, and optionally an activator to obtain said procatalyst.