Patent ID: 7208531
Filing Date: 2007-04-24
Classification: C08G

Abstract:
1. A viscoelastic polyurethane foam comprising a reaction product of: (A) an isocyanate component; (B) a first polyether polyol having; (C) a second polyether polyol having; wherein said first polyether polyol (B) is reacted in an amount of from 50 to 65% by weight, and said second polyether polyol (C) is reacted in an amount of from 35 to 50% by weight, both based on the total weight of the first and the second polyether polyols; (D) a chain extender present in an amount of from 3 to 20 parts by weight based on the total weight of (A), (B), (C), and (D) and having; said foam having a density of from 1 to 20 pounds per cubic foot and having a first glass transition temperature greater than zero degrees Celsius and a second glass transition temperature less than zero degrees Celsius and having a tan delta peak ratio of said first glass transition temperature to said second glass transition temperature less than 2.2.