Method for preparing polyolefin polymer for fiber production

A method for preparing a polyolefin polymer for fiber production comprising polymerizing one or more olefin monomers in the presence of a hybrid supported metallocene catalyst,

• wherein the hybrid supported metallocene catalyst includes a first cocatalyst supported on a support, first and second metallocene compounds represented by the following Chemical Formulas 1 and 2, and a second cocatalyst, and is prepared by a method comprising:
• supporting a first metallocene compound of the following Chemical Formula 1 and a second metallocene compound of the following Chemical Formula 2, respectively, before and after a step of supporting the first cocatalyst on the support;
• and
• supporting a borate-based second catalyst on the support:
• (Ra)p(Rb)M′Q3-p [Chemical Formula 1]
• wherein, in Chemical Formula 1 above,
• P is an integer of 0 or 1,
• M′ is a Group 4 transition metal,
• Ra and Rb may be the same as or different from each other and are each independently a cyclopentadienyl ligand substituted with one or more selected from the group consisting of hydrogen, an alkyl having 1 to 20 carbon atoms, an alkoxyalkyl having 2 to 20 carbon atoms, a cycloalkyl having 3 to 20 carbon atoms, an aryl having 6 to 40 carbon atoms, an alkenyl having 2 to 20 carbon atoms, an alkylaryl having 7 to 40 carbon atoms, an arylalkyl having 7 to 40 carbon atoms, and an arylalkenyl having 8 to 40 carbon atoms, and
• Q is a halogen,
• wherein, in Chemical Formula 2 above,
• R1 to R17 are the same as or different from each other and are each independently hydrogen, a halogen, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, a cycloalkyl group having 2 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an alkylaryl group having 7 to 20 carbon atoms, or an arylalkyl group having 7 to 20 carbon atoms;
• or R1 to R17 are bonded to each other to form a cycloalkyl group having 2 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an alkylaryl group having 7 to 20 carbon atoms, or an arylalkyl group having 7 to 20 carbon atoms;
• and at least one of R1 to R17 is a substituent other than hydrogen and a halogen among the above substituents,
• L is a linear or branched alkylene group having 1 to 10 carbon atoms,
• D is —O—, —S—, —N(R18)—, or —Si(R19)(R20)— wherein R18 to R20 are the same as or different from each other and are each independently hydrogen, a halogen, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, or an aryl group having 6 to 20 carbon atoms,
• A is hydrogen, a halogen, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, an alkylaryl group having 7 to 20 carbon atoms, an arylalkyl group having 7 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, an alkoxyalkyl group having 2 to 20 carbon atoms, a heterocycloalkyl group having 2 to 20 carbon atoms, or a heteroaryl group having 5 to 20 carbon atoms,
• M is a Group 4 transition metal, and
• X1 and X2 are the same as or different from each other and are each independently a halogen, an alkyl group having 1 to 20 carbon atoms, an alkenyl group having 2 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, a nitro group, an amido group, an alkylsilyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, or a sulfonate group having 1 to 20 carbon atoms.