RUBBER COMPOSITION, VULCANIZED RUBBER, AND TIRE

摘要

The invention relates to a rubber composition having a good processability, and simultaneously having a rolling resistance performance and hardness after vulcanization at high levels, with which the contamination of the mold for processing due to the bleeding-out of the plasticizer can be suppressed, and in which the migration of the plasticizer and so on is suppressed to a low level; a vulcanized rubber obtained by vulcanizing the rubber composition; and to a tire including the rubber composition as at least a part thereof. The rubber composition contains 100 parts by mass of rubber component (A) composed of at least one of a synthetic rubber and a natural rubber, 0.1 to 50 parts by mass of a diene polymer (B), 20 to 150 parts by mass of a filler (C), 0.1 to 10 parts by mass of a vulcanizing agent (D), 0.1 to 15 parts by mass of a vulcanization accelerator (E) and 0.1 to 15 parts by mass of vulcanization aid (F).

主权项

1. A rubber composition, comprising
100 parts by mass of rubber component (A) comprising at least one of a synthetic rubber and a natural rubber; 0.1 to 50 parts by mass of a diene polymer (B); 20 to 150 parts by mass of a filler (C); 0.1 to 10 parts by mass of a vulcanizing agent (D); 0.1 to 15 parts by mass of a vulcanization accelerator (E); and 0.1 to 15 parts by mass of vulcanization aid (F), wherein a vulcanization rate (t90) of the diene polymer (B) measured under the measuring conditions below is 25 minutes or less: measuring conditions
To 100 parts by mass of the diene polymer (B), 70 parts by mass of carbon black of ASTM N330, 3.5 parts by mass of zinc oxide, 2 parts by mass of stearic acid, 1.5 parts by mass of sulfur, 1.2 parts by mass of N-(tert-butyl)-2-benzothiazole sulfenamide and 1 part by mass of N-phenyl-N′-(1,3-dimethylbutyl)-p-phenylenediamine are added, and a torque at 140° C. is measured using an oscillating type curemeter and vulcanization time to reach 90% vulcanization degree is measured.