No-puncture tire filler and method for producing the same

摘要

PROBLEM TO BE SOLVED: To provide a no-puncture tire filling material and production method therefor that has good light weight, ride comfort, rolling resistance and filling material durability.SOLUTION: A no-puncture tire filling material 10 to be accommodated in an annular space 27 constituted by a tire outer cover 20 and a rim 25 was made of an urethane elastomer formed by prepolymer method using a prepolymer made from an isocyanate comprising at least one of 1,5-naphthalene diisocyanate (NDI) and 3'-dimethyl-4,4'-biphenyl diisocyanate (TODI), and a polyol containing 50 to 90 pts.wt. of polytetramethylene glycol.SELECTED DRAWING: Figure 1