Hydrogenated polymer composition containing hydrogenated conjugated diene modified polymer having boron-containing functional group and method for producing same

A hydrogenated polymer composition comprising:

• 65 to 99% by mass of at least one boronic acid-based hydrogenated conjugated diene modified polymer (A) selected from the group consisting of a hydrogenated conjugated diene modified polymer containing a boronic acid group represented by Formula (II), a hydrogenated conjugated diene modified polymer containing a boronate ester group represented by Formula (III), and a hydrogenated conjugated diene modified polymer containing a boronic acid salt group represented by Formula (IV);
• and 1 to 35% by mass of at least one borinic acid-based hydrogenated conjugated diene modified polymer (B) selected from the group consisting of a hydrogenated conjugated diene modified polymer containing a borinic acid group represented by Formula (V) or (VI), a hydrogenated conjugated diene modified polymer containing a borinate ester group represented by Formula (VII) or (VIII), and a hydrogenated conjugated diene modified polymer containing a borinic acid salt group represented by Formula (IX) or (X):
• wherein P1, P2, and P3 each represent a polymer chain containing hydrogenated conjugated diene units, R1 and R2 each independently represent a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, at least one of R1 or R2 represents an alkyl group having 1 to 12 carbon atoms, or R1 and R2 are bonded to form an alkylene chain having 2 to 24 carbon atoms, R3, R4, and R5 each independently represent a hydrogen atom, an alkyl group having 1 to 12 carbon atoms, or a polymer chain containing hydrogenated conjugated diene units, at least one of R3, R4, or R5 represents an alkyl group having 1 to 12 carbon atoms or a polymer chain containing hydrogenated conjugated diene units, or R3 and R4, R3 and R5, or R4 and R5 may be bonded to form an alkylene chain having 2 to 24 carbon atoms, or R3, R4, and R5 may be bonded to form a trivalent saturated hydrocarbon chain having 3 to 36 carbon atoms, and M represents one alkali metal or ½ alkaline earth metal,
• wherein P4, P5, P6, P7, P8, P9, P10, P11, and P12 each represent a polymer chain containing hydrogenated conjugated diene units, R6, R7, R8, and R9 each independently represent an alkyl group having 1 to 12 carbon atoms, R10 and R11 each independently represent a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, at least one of R10 or R11 represents an alkyl group having 1 to 12 carbon atoms, or Rn and R11 are bonded to form an alkylene chain having 2 to 24 carbon atoms, R12 represents an alkyl group having 1 to 12 carbon atoms, R13 and R14 each independently represent a hydrogen atom or an alkyl group having 1 to 12 carbon atoms, at least one of R13 or R14 represents an alkyl group having 1 to 12 carbon atoms, or R13 and R14 are bonded to form an alkylene chain having 2 to 24 carbon atoms, and M represents one alkali metal or ½ alkaline earth metal.