Patent ID: 8497327

Claim:
A β-pinene-based polymer comprising 50 mass % or more of β-pinene units, wherein: the β-pinene-based polymer is obtained by hydrogenating olefinic double bonds of a first β-pinene-based polymer comprising 50 mass % or more of β-pinene units, in the presence of a catalyst at a hydrogen pressure of 7 MPa or higher; a ratio of a proton integral value at 6 to 8 ppm to a total proton integral value in a 1 H-NMR spectrum is 2.3×10 −5 or less; a ratio of a proton integral value at 4.5 to 6 ppm to the total proton integral value is 2.8×10 −4 or less; and a number average molecular weight of the polymer is from 30,000 to 200,000 g/mol.