Abstract: Described are viscoelastic polyurethane foams that comprise the reaction product of a polyisocyanate and an active-hydrogen composition comprising an amidated or transesterified oligomeric natural oil polyol.

Abstract: Described are viscoelastic polyurethane foams that comprise an oligomeric natural oil polyol and a petroleum-derived polyol. The viscoelastic foams are formed by reacting a polyisocyanate with an active-hydrogen composition that comprises the oligomeric natural oil polyol and petroleum-derived polyol.

Abstract: This invention relates to low resilience, viscoelastic foams which have slower recovery and improved tear strength, and to a process for the production of these foams. The viscoelastic foams of the invention comprise the reaction product of a polyisocyanate with an isocyanate-reactive component, in the presence of a blowing agent, a surfactant and a catalyst. Suitable isocyanate-reactive components comprise at least about 5% by weight of at least one polyether polyol having about 2 to about 4 reactive hydroxyl groups per molecule, an equivalent weight of about 280 to about 2,000, and which is the alkoxylation product of an organic compound which contains at least two aromatic rings, contains from about 2 to about 4 Zerewitinoff active hydrogen atoms and has an equivalent weight of about 100 to about 575.

Abstract: A process for rapidly cooling porous foam material to prevent oxidation or autoignition of said foam. The process includes a first cooling step wherein cooled ambient air is drawn through the foam block thereby cooling, dehumidifying and removing fumes from said block before being vented, a second cooling step wherein cooled ambient air is drawn through the block for further cooling thereof, with sublimates in the block being condensed and redeposited within the block, and a third cooling step wherein ambient air is drawn through the material so as to remove remaining fumes, heat and moisture therefrom. The process of the present invention advantageously utilizes a foam formulation which includes an increased percentage of water for providing adequate foaming of the material while minimizing or obviating the need for including toxic auxiliary blowing agents in the formulation.