| abstract |
An α-olefin polymer has (A) a tacticity index(meso triad fraction)[mm] of 10 to 50 mol %, (B) a kinematic viscosity at 100° C. of 200 to 10,000 mm 2 /s, (C) a content of a dimer and a trimer is less than 2 mass %, and (D) an average number of carbon atoms of 4 to 30. |