PURPOSE: To bond a rubber without performing crosslinking by reacting a specific rubber and a phenol compound if necessary in the presence of a catalyst in a lumpy state.
CONSTITUTION: A natural or synthetic rubber (A) having Mn of 40000 or more, pref., 40000-200000 and having 3-250 double bonds per 1000 carbon atoms in the rubber and a phenol compound (B) represented by formula I or II (wherein R1-R3 are each H, a 1-12C alkyl, cyclohexyl, phenyl, a 1-12C alkoxy, a 1-6C alkylphenyl, a phenyl 1-6C alkyl, F or Cl and R1 and R2 may form an alicyclic or aromatic condensed 6-membered ring; (m) is 1-2; and Y is a group capable of reacting with a radical) are reacted in a lumpy state at 50-150°C for 1-30 min in the presence of a 0-0.2 mol per one mol of the component B of a catalyst to obtain the objective rubber having 5-60 phenolic OH groups.
RARUFU DOUYARUDEIN
HANSUUBIRUHERUMU ENGERUSU
