| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject readily degradable and easily disposable foam useful as a foam, or the like, for a paper diaper by specifying the half-life of strength and/or specifying the isocyanate index. SOLUTION: This foam is obtained by regulating the half-life of strength (under conditions of 70 deg.C and 95% RH) within 50 days, preferably within 30 days and/or regulating the isocyanate index to 40-98, preferably 70-90. The foam is obtained by reacting, e.g. (A) 100 pts.wt. of a polyol which is a polyol having hydrophilic groups such as a polyether polyol synthesized by preferably a ring opening polymerization of ethylene oxide and having ether bonds or a polyester polyol synthesized by a polycondensation or successive polymerization and having ester bonds and having 1.1-3.0 number of functional groups with (B) 10-80 pts.wt. of an isocyanate having preferably 1-5 content of NCO based on one molecule. |
