Metallocene compound, catalyst for olefin polymer, method for producing olefin polymer, and olefin polymer

A method for producing an olefin polymer, which comprises carrying out an ethylene homopolymerization or ethylene/α-olefin copolymerization in the presence of an olefin polymerization catalyst comprising the following components (A) and (B), and optionally comprising the following component (C):

• Component (A):
• a metallocene compound of formula [I]:
• in which:
• M represents Ti, Zr, or Hf;
• X1 and X2 are the same or different, each representing a hydrogen atom, an alkyl group having from 1 to 10 carbon atoms, an alkoxy group having from 1 to 10 carbon atoms, an aryl group having from 6 to 20 carbon atoms, an aryloxy group having from 6 to 10 carbon atoms, an alkenyl group having from 2 to 10 carbon atoms, an arylalkyl group having from 7 to 40 carbon atoms, an alkylaryl group having from 7 to 40 carbon atoms, an arylalkenyl group having from 8 to 40 carbon atoms, an alkyl group having from 1 to 20 carbon atoms and substituted with a silyl group having a hydrocarbon group having from 1 to 6 carbon atoms, a substituted amino group having from 1 to 10 carbon atoms, a group OH, or a halogen atom;
• R1 to R9 and R11 to R19 are the same or different, each representing a hydrogen atom, a halogen atom, an alkyl group having from 1 to 10 carbon atoms, a halogenoalkyl group having from 1 to 10 carbon atoms, an aryl group having from 6 to 20 carbon atoms, an alkoxy group having from 1 to 10 carbon atoms, a silyl group having a hydrocarbon group having from 1 to 6 carbon atoms, an alkyl group having from 1 to 20 carbon atoms and substituted with a silyl group having a hydrocarbon group having from 1 to 6 carbon atoms, a group —NR212, a group —SR21, a group —OSiR213, or a group —PR212, in which R21's are the same or different, each representing a halogen atom, an alkyl group having from 1 to 10 carbon atom or an aryl group having from 6 to 20 carbon atoms, the neighboring groups of R1 to R9 and R11 to R19 optionally form one or more aromatic rings or aliphatic rings along with the atom bonding them, or R4 and R5, or R4 and R9, or R14 and R15, or R14 and R19 optionally form one aromatic ring or aliphatic ring along with the atom bonding them;
• R10 and R20 are the same or different, each representing a hydrogen atom, a halogen atom, an alkyl group having from 1 to 10 carbon atoms, a fluoroalkyl group having from 1 to 10 carbon atoms, an alkoxy group having from 1 to 10 carbon atoms, an aryl group having from 6 to 20 carbon atoms, a fluoroaryl group having from 6 to 10 carbon atoms, an aryloxy group having from 6 to 10 carbon atoms, an alkenyl group having from 2 to 10 carbon atoms, an arylalkyl group having from 7 to 40 carbon atoms, an alkylaryl group having from 7 to 40 carbon atoms, or an arylalkenyl group having from 8 to 40 carbon atoms, provided that R10 and R20 are not hydrogen atoms at the same time, and R10 and R20 optionally form one or more rings along with the atom bonding them;
• Component (B):
• a compound or an ion-exchanging layered silicate, which reacts with Component (A) to form an ion pair;
• and
• Component (C):
• an organoaluminium compound;
• wherein the polymerization temperature is 120° C. or more.