METHOD FOR PREPARING POLYOLEFIN AND POLYOLEFIN PREPARED THEREBY

摘要

The present invention relates to a method for preparing polyolefin that can easily and effectively prepare polyolefin having high molecular weight and various molecular weight distributions, which was difficult to prepare using the existing metallocene catalyst, and polyolefin prepared thereby. The method for preparing polyolefin comprises the step of polymerizing olefin monomers, in the presence of a metallocene supported catalyst wherein a metallocene compound having a specific chemical structure is supported in a carrier, and hydrogen gas.

主权项

1. A method for preparing polyolefin comprising the step of polymerizing olefin monomers, in the presence of a supported metallocence catalyst wherein one or more kind of a first metallocene compound represented by the following Chemical Formula 1 and a cocatalyst are supported in a carrier, and hydrogen gas: in the Chemical Formula 1, A is hydrogen, halogen, a C1 to C20 alkyl group, a C2 to C20 alkenyl group, a C6 to C20 aryl group, a C7 to C20 alkylaryl group, a C7 to C20 arylalkyl group, a C1 to C20 alkoxy group, a C2 to C20 alkoxyalkyl group, a C3 to C20 heterocycloalkyl group, or a C5 to C20 heteroaryl group; D is —O—, —S—, —N(R)— or —Si(R)(R′)—, and R and R′ are identical to or different from each other, and are each independently hydrogen, halogen, a C1 to C20 alkyl group, a C2 to C20 alkenyl group, or a C6 to C20 aryl group; L is a Cl to C10 linear or branched alkylene group; B is carbon, silicon or germanium; Q is hydrogen, halogen, a C1 to C20 alkyl group, a C2 to C20 alkenyl group, a C6 to C20 aryl group, a C7 to C20 alkylaryl group, or a C7 to C20 arylalkyl group; M is Group 4 transition metal; X1 and X2 are identical to or different to each other, and are each independently halogen, a C1 to C20 alkyl group, a C2 to C20 alkenyl group, a C6 to C20 aryl group, a nitro group, an amido group, a C1 to C20 alkylsilyl group, a C1 to C20 alkoxy group, or a C1 to C20 sulfonate group; C1 and C2 are identical to or different from each other, and are each independently represented by one of the following Chemical Formula 2a, Chemical Formula 2b or Chemical Formula 2c, provided that both C1 and C2 are not Chemical Formula 2c; in the Chemical Formula 2a, 2b and 2c, R1 to R17 and R1′ to R9′ are identical to or different from each other, and are each independently hydrogen, halogen, a C1 to C20 alkyl group, a C2 to C20 alkenyl group, a C1 to C20 alkylsilyl group, a C1 to C20 silylalkyl group, a C1 to C20 alkoxysilyl group, a C1 to C20 alkoxy group, a C6 to C20 aryl group, a C7 to C20 alkylaryl group, or a C7 to C20 arylalkyl group, and two or more neighboring groups of R10 to R17 may be connected to each other to form a substituted or unsubstituted aliphatic or aromatic ring.