Alkylidene aminoguanidine and salt thereof, modifying composition, modified rubber for tire, rubber composition for tire, and tire

摘要

Provided is a compound represented by formula (1):; wherein X is an acid to form a salt with a guanidine site; and R¹ and R² are each independently any selected from the group consisting of a hydrogen atom, a C_1-18 alkyl group, a cycloalkyl group, an aryl group, an alkylaryl group, and an alkenyl group, each of the groups optionally having one or more substituents each containing a sulfur atom, a nitrogen atom, or an oxygen atom.