Patent ID: 7388037

Claim:
A flexible polyurethane foam, having a core impact resilience of at most 3% as measured according to JIS K 6400 at 23° C. and glass transition points within ranges of from -80° C. to -60° C. and from -20° C. to lower than 0° C.; said polyurethane foam being obtained by reacting a polyol mixture with a polyisocyanate compound; wherein said polyol mixture comprises a polyol (1) having a hydroxyl value of from 5 to 15 mgKOH/g and a polyol (2) having a hydroxyl value of from 40 to 250 mgKOH/g and a number of functional groups of from 2 to 4; and wherein said polyol (1) has a oxyalkylene random chain having a content of oxyethylene groups of from 3 to 50 mass%, based on the oxyalkylene random chain.