Patent ID: 9464157
Filing Date: 2016-10-11
CPC Classification: C08G

Claim Text:
1. A polyurethane foam formed from a reaction mixture comprising a toluene diisocyanate and a polyether polyol mixture as main components, wherein the polyurethane foam has a glass transition temperature, defined as a temperature corresponding with a peak value of a loss tangent, of not less than 0° C. and not more than 40° C., wherein in a temperature range from not less than 0° C. to not more than 40° C., the loss tangent in a frequency range from not less than 0.1 Hz to not more than 100 Hz is 0.4 or greater, wherein an average value of the loss tangent in a frequency range from not less than 0.1 Hz to not more than 1 Hz is not greater than an average value of the loss tangent in a frequency range from not less than 10 Hz to not more than 100 Hz, wherein a percentage change in the average value of the loss tangent in the frequency range from not less than 10 Hz to not more than 100 Hz relative to the average value of the loss tangent in the frequency range from not less than 0.1 Hz to not more than 1 Hz is not less than 0% and not more than 2.4%, and wherein the polyether polyol mixture comprises at least two polyoxypropylene triols having a molecular weight of not less than 700 and not more than 3,000, and at least two polyoxypropylene diols having a molecular weight of not less than 400 and not more than 2,000.