Ethylene interpolymerizations

Details Ethylene interpolymerizations Ethylene interpolymerizations

C - Chemistry, Metallurgy

08

F

C08F 297/08 (2006.01) C08F 210/16 (2006.01) C08L 23/08 (2006.01) C08F 4/659 (2006.01)

Patent

CA 2153978

Processes for polymerizing ethylene/a-olefin interpolymer compositions are disclosed. The interpolymer compositions have a controlled composition and a controlled molecular weight distribution. The processes utilize a highly-efficient homogeneous catalyst composition in at least one reactor to produce a first interpolymer having a narrow composition distribution and a narrow molecular weight distribution, and a highly-efficient heterogeneous Ziegler catalyst in at least one other reactor. The reactors can be operated sequentially or separately, depending upon the desired product. The novel compositions have good optical properties (e.g., clarity and haze) and good physical properties (e.g., modulus, yield strength, toughness and tear). Useful products which can be formed from these compositions include film, molded articles and fiber.

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