RUBBER COMPOSITION FOR PRODUCING FOAM HAVING HIGH EXPANSION RATIO, FOAM HAVING HIGH EXPANSION RATIO, TIRE, ACOUSTIC MEMBER, SEALING MATERIAL, HOSE, BELT, WIRE COVERING, THERMAL INSULATION MATERIAL, EXPANSION RATIO IMPROVER FOR RUBBERS, METHOD FOR IMPROVING EXPANSION RATIO OF FOAM, AND METHOD FOR PRODUCING FOAM HAVING HIGH EXPANSION RATIO

摘要

The present invention provides: a rubber composition for producing a foam having a high expansion ratio; a foam having a high expansion ratio; a tire; an acoustic member; a sealing material; a hose; a be a wire covering; a thermal insulation material; an expansion ratio improver for rubbers; a method for improving the expansion ratio of a foam; and a method for producing a foam having a high expansion ratio.　A rubber composition for producing a foam having a high expansion ratio, said rubber composition containing the components (a), (b), (c) and (d) described below.　(a) a rubber component(b) a chemical foaming agent(c) a compound represented by formula (1) or a salt thereof(d) at least one agent that is selected from the group consisting of vulcanizing agents and crosslinking agents(In the formula, R1 represents a hydrogen atom, an alkyl group or an aralkyl group; and R2, R3 and R4 may be the same or different, and each represents a hydrogen atom, an alkyl group, an aralkyl group or an aryl group, each of which may additionally have one or more substituents.)