Low resilience urethane foam

Low resilience urethane foam produced by reaction of urethane foam compositions comprising polyol (a), polyisocyanate (b), catalyst (c) and blowing agent (d), wherein:

• the low resilience urethane foam has at least one glass transition point in each of a temperature range of −70° C. to −20° C. and a temperature range of 0° C. to 60° C.;
• and
• where the glass transition point is expressed as a tan δ peak obtained when measurement on dynamic viscoelasticity of the low resilience urethane foam is carried out at a frequency of 10 hertz, at least one of the tan δ peak(s) in the temperature range of −70° C. to −20° C. is 0.15 or more and at least one of the tan δ peak(s) in the temperature range of 0° C. to 60° C. is 0.3 or more;
• further wherein the polyol (a) comprises polyol (a-1) of 1.5 to 4.5 in average functionality and 20-70 mgKOH/g in hydroxyl value;
• and polyol (a-2) of 1.5 to 4.5 in average functionality and 140-300 mgKOH/g in hydroxyl value and contains therein the polyol (a-1) in an amount from 32 weight percent to 80 weight percent and the polyol (a-2) in an amount from 20 weight percent to 68 weight percent;
• and further
• the polyol (a-2) is polyoxyalkylene polyol in which an oxyethylene unit of not less than 20 weight percent is contained in the oxyalkylene unit.