Highly crystalline poly-1-butene, the process for preparing...

Details Highly crystalline poly-1-butene, the process for preparing... Highly crystalline poly-1-butene, the process for preparing...

C - Chemistry, Metallurgy

08

F

252/109, 402/645

C08F 4/645 (2006.01) C08F 10/08 (2006.01)

Patent

CA 1332490

Abstract When polymerizing 1-butene either alone or together with minor quantities of (below about 10%) of other unsaturated monomers, a Ziegler-Natta- composition may be used as high-yield-catalyst, in which, by means of a combination of a solid tetravalent Ti compound supported on MgCl2, an organic Al compound and possib- le electron donors, liquid hydrocarbon containing 5 to 12 C atoms has been prepolymerized. With this prepolymerized catalyst compo- sition 1-butene may be polymerized particularly in a gas phase. The catalyst composition obtained and the final 1-butene polymer are highly crystalline and do not adhere to each other, and are thus easy to handle and most fluid. The mechanical properties of the product polymer, such as hardness, elastic modulus, tensile strength, yield point, impact strength, etc., are high, and the optical properties, such as light transmission, are equally good.

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