Patent ID: 6204300
Filing Date: 2001-03-20
Classification: C08G

Abstract:
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.degree. C. to -20.degree. C. and a temperature range of 0.degree. C. to 60.degree. C.; andwhere the glass transition point is expressed as a tan .delta. 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 .delta. peak(s) in the temperature range of -70.degree. C. to -20.degree. C. is 0.15 or more and at least one of the tan .delta. peak(s) in the temperature range of 0.degree. C. to 60.degree. 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 furtherthe polyol (a-2) is polyoxyalkylene polyol in which an oxyethylene unit of not less than 20 weight percent is contained in the oxyalkylene unit.