Abstract: A polyurethane foam can be made from waste cellulosic products such as papermill sludge, wood chips, wood particles, sawdust, waste paper or cardboard scraps. The polyurethane foam is made by reacting together a polyisocyanate, a catalyst, and a cellulosic material.
Abstract: Polyurethane foams are produced utilizing separate mixtures, the first containing a polyisocyanate, a surfactant and optionally a flame retardant, the second containing a carbohydrate, water and a polyurethane producing amine catalyst, the pH of the second mixture being at least 9.
Abstract: A low reactive pressure flame-retardant polyurethane foam made by reacting together a polymeric isocyanate, a polyol, an aqueous solution of a carbohydrate, calcium acid phosphate, sodium aluminum sulfate, sodium bicarbonate, and a flame retardant. A blowing agent may be present.