RUBBER COMPOSITION ,AND VULCANIZATE AND MOLDED ARTICLE THEREOF

摘要

Provided are a rubber composition whereby a vulcanizate having excellent heat resistance is obtained and a vulcanizate and molded article of the rubber composition. A rubber composition obtained by blending 3- 20 parts by mass of zinc powder having an arithmetic average particle diameter of 3 -10 µm as measured by a method in accordance with JIS Z8901 and 4 -16 parts by mass of magnesium oxide having a BET specific surface area of 20- 150 m/g as measured by a one- point method in accordance with JIS Z8830 with respect to 100 parts by mass of a rubber component comprising 50- 90% by mass of chloroprene rubber and 10- 50% by mass of an elastomer. The rubber composition is molded/vulcanized to obtain a vulcanizate or a molded article.