OLEFIN POLYMERIZATION CATALYST, PREPARATION METHOD THEREFOR, OLEFIN POLYMERIZATION CATALYST SYSTEM, APPLICATION THEREOF, AND PREPARATION METHOD FOR POLYOLEFIN RESIN

摘要

The present invention provides modified olefin polymerization catalyst, preparation method thereof, olefin polymerization catalyst system, use thereof and method of preparing polyolefin resin. The modified olefin polymerization catalyst comprises an olefin polymerization catalyst and an organosilane, wherein the organosilane is represented by a general formula R 1 m SiX n (OR 2 ) k , wherein R 1 is a C 2 -C 20 alkyl group and a terminal of R 1 has an ±-olefin double bond, a norbornene group, a cycloolefin group or a dicyclopentadiene group, X is a halogen element, R 2 is a C 1 -C 20 linear chain, branched chain or isomerized alkyl group, m is an integer within a range of 1-3, n is an integer within a range of 1-3, k is an integer within a range of 0-2, and m+n+k=4. A series of high-performance polyolefin resins, including homopolymerized polyolefin resin with high melt strength and high mechanical strength, polyolefin elastomer with high rubber phase content, and polyolefin elastomer with a rubber phase in a crosslinked structure, etc., can be obtained through polymerization in reactor by using the modified olefin polymerization catalyst.