kautschukzusammensetzung for a clinch apex, and tire with clinch - to - apex

摘要

There is provided the rubber composition for a clinch apex keeping hardness constant, suppressing prevulcanization, reducing rolling resistance, improving processability, suppressing generation of chafing between the clinch apex and a rim and hardly causing slipping of the clinch apex on the rim. The rubber composition for a clinch apex comprises 55 to 75 parts by weight of carbon black and 1 to 5parts by weight of para-benzoquinolinediimine based on 100 parts by weight of a rubber component comprising 10 to 50 % by weight of a natural rubber and/or an isoprene rubber and 50 to 90 % by weight of a butadiene rubber having a Mooney viscosity at 100 DEG C of 30 to 55 in an unvulcanized state, and the pneumatic tire has the clinch apex using the rubber composition.