Process for the preparation of a syndiotactic polyolefin

Details Process for the preparation of a syndiotactic polyolefin Process for the preparation of a syndiotactic polyolefin

C - Chemistry, Metallurgy

08

F

402/626

C08F 4/06 (2006.01) C08F 10/00 (2006.01) C08F 110/06 (2006.01) C08F 4/659 (2006.01) C08F 4/6592 (2006.01)

Patent

CA 2011880

Abstract of the disclosure: Process for the preparation of a syndiotactic polyolefin A syndiotactic polyolefin is obtained in a high yield by polymerization or copolymerization of an olefin of the formula Ra-CH=CH-Rb in the presence of a catalyst consist- ing of a metallocene of the formula I Image (I) and an aluminoxane. This polyolefin has a very high syndiotactic index. At a low polymerization temperature, a polyolefin having a low average molecular weight and narrow molecular weight distribution is obtained, and at a high polymerization temperature a polymer having a high average molecular weight and a wide molecular weight distribution is obtained. Shaped articles produced from the polymers are distinguished by a high transparency, flexibility, tear strength and excellent surface gloss.

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