FOAMED RUBBER COMPOSITION FOR SHOE SOLE AND OUTERSOLE

摘要

Provided is a foamed rubber composition for a shoe sole that is lightweight, has suitable hardness, and has excellent tensile strength, tearing strength, and impact absorbance, and an outersole that uses the same.  The foamed rubber composition for a shoe sole uses (A) a vulcanizable rubber, (B) a vinyl cis-butadiene rubber (VCR) that is not (A) and that has a boiling n-hexane-insoluble content of 1 to 25 wt% and a boiling n-hexane-soluble content of 99 to 75 wt%, and (C) a thermoplastic resin, in combination with a foaming agent composed of (D1) a thermal expanding foaming agent and (D2) a pyrolyzing foaming agent such that there are 0.5 to 3.0 parts by weight of (D1) and 0.5 to 7.0 parts by weight of (D2) per 100 parts by weight of the total rubber components consisting of (A) + (B) + (C).