SOFT POLYURETHANE FOAM, CLOTHING MATERIAL, PAD OF BRASSIERE, CUP OF BRASSIERE, AND PRODUCTION METHOD FOR SOFT POLYURETHANE FOAM

摘要

This soft polyurethane foam is obtained by reaction and foaming of a polyisocyanate component containing a derivative of an aliphatic polyisocyanate and a polyol component containing a polyoxyalkylene polyol, wherein the derivative includes an allophanate derivative of an aliphatic polyisocyanate, the content ratio of the allophanate derivative of the aliphatic polyisocyanate is 70 mol% or more with respect to the total amount of the derivatives of the aliphatic polyisocyanate, the polyoxyalkylene polyol contains a combination of an oxyethylene unit and an oxypropylene unit, the oxyethylene unit accounts for 5-20 mol% with respect to the polyoxyalkylene polyol, and the primary hydroxy group accounts for 50 mol% or less with respect to the total number of moles of the terminal hydroxy groups of the polyoxyalkylene polyol.