Patent ID: 8716418

Claim:
A process for producing a syndiotactic α-olefin polymer comprising polymerizing a monomer that comprises at least one α-olefin having 3 to 10 carbon atoms and a small amount of ethylene, in the presence of an olefin polymerization catalyst comprising a transition metal compound (A) represented by the following general formula [1], at least one compound (B) selected from an organoaluminum oxy-compound (b-1), a compound (b-2) that reacts with the transition metal compound (A) to form an ion pair and an organoaluminum compound (b-3), which process for producing a syndiotactic α-olefin polymer satisfies the relationship: 0.001≦P E /P O ≦0.030, wherein P E and P O are molar amounts of ethylene and the α-olefin respectively that are fed to a polymerization reactor under a polymerization temperature of not lower than 25° C.; wherein four groups: R 1 , R 2 , R 3 and R 4 are selected from the group consisting of a hydrogen atom, a hydrocarbon group and a silicon-containing group, and are the same as or different from one another; R 1 and R 2 are not bonded to each other to form a ring; R 3 and R 4 are not bonded to each other to form a ring; R 5 and R 6 are each an atom or a substituent selected from the group consisting of a hydrogen atom, a hydrocarbon group having 2 to 20 carbon atoms and a silicon-containing group, and are the same as or different from one another; M is selected from a titanium atom, a zirconium atom and a hafnium atom; Q is a halogen atom, a hydrocarbon group, a neutral and conjugated or non-conjugated diene having 10 or less carbon atoms, an anionic ligand or a neutral ligand capable of coordination by lone pair electrons; j is an integer of 1 to 4, and when j is 2 or more, each Q is the same as or different from one another.