Patent ID: 7129303

Claim:
A method for producing homo- and co-polymers of ethylene, comprising polymerization in the presence of: (a) a solid titanium catalyst produced by the method comprising: (i) preparing a magnesium compound solution by contact-reacting a halogenated magnesium compound with an alcohol; (ii) reacting the magnesium compound solution with electron donors, the electron donors comprising an ester compound having at least one hydroxyl group and a first silicon compound having at least one alkoxy group represented by the general formula R n Si(OR) 4-n , wherein R is a hydrocarbon having 1–12 carbons, and wherein n is an integer from 0–3; and (iii) further reacting the mixture resulting from the reaction of the magnesium compound solution with electron donors with a titanium compound and a second silicon compound represented by the general formula R n SiCl 4-n , wherein R is hydrogen, alkyl, alkoxy, haloalkyl, aryl group having 1–10 carbons, halosilyl, or halosilylaklyl group having 1–8 carbons, and wherein n is an integer from 0–3; (b) organometallic compounds of Group II or III of the Periodic Table; and (c) an alkoxysilane compound and a haloalkane compound.