Patent ID: 11891460
Assignee: W.R. GRACE & CO.—CONN.
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 15:
16. A process for producing an activated solid catalyst component comprising:
a. forming a catalyst precursor component by reacting a magnesium alkoxide Mg(OR)nX2-n, or magnesium alcholate MgX2mR′OH with Ti(OR″)gX4-g wherein X is Br, Cl, or I; and n is 1 or 2; m is 0.5-10; g is 0, 1, 2, 3, or 4; and R, R′, R″ are independently C1-C10 alkyl, the catalyst precursor further containing a supportive electron donor and an internal electron donor
b. reacting the product obtained from (a) with a trialkyl aluminum compound in the presence of an organosilicon compound having the following formula R2nSi(OR3)4-n, wherein R2 is H, alkyl, or aryl; each R3 is alkyl, or aryl; n is 0, 1, 2 or 3,
c. reacting the product obtained in (b) with an olefin having the formula CH2═CHR′ wherein R′═H, or a C1-C7 alkyl group and polymerizing the olefin to form a polymer coating on the solid catalyst component particles, the olefin polymer being present in an amount of less than 200 g per 1 g of the activated solid catalyst component,
d. isolating the activated solid catalyst component.