Patent ID: 10745545

Abstract:
This disclosure is to provide a method of manufacturing a rubber composition comprising kneading a rubber composition that includes 100 parts by mass (pbm) of a rubber component (A) including 50 mass % or more of natural rubber, 5-50 pbm of at least one kind of thermoplastic resin (B) selected from among C5-based resins, C5-C9-based resins, C9-based resins, terpene-based resins, terpene-aromatic compound-based resins, rosin-based resins, dicyclopentadiene resins, and alkylphenol-based resins; 20-120 pbm of a filler (C) including silica; at least one kind of vulcanization accelerator (D) selected from among guanidines, sulfenamides, thiazoles, thiourea and diethyl thiourea; a silane coupling agent (E); and a vulcanizing agent (F). The kneading comprises a kneading stage A for kneading components (A)-(C), part or all of component (D), and 2 pbm or more of component (E), and a kneading stage B for kneading component (F) with a kneaded product of the kneading stage A.