FLEXIBLE POLYURETHANE FOAMS MADE FROM ALKOXYLATED NATURAL OIL

摘要

The present invention provides flexible conventional polyurethane foams made from at least one polyisocyanate and at least one vegetable oil alkoxylated in the presence of a double metal cyanide (DMC) catalyst, optionally at least one non-vegetable oil-based polyol, generally in the presence of a blowing agent and optionally in the presence of a surfactant, pigment, flame retardant, catalyst or filler. The alkoxylated natural oil must have (a) an ethylene oxide content in the alkoxylated segment greater than 20% by weight, (b) a primary hydroxyl group content of at least 10%, with the sum of (a) + (b) being at least 30% but no greater than 60%, The alkoxylated natural oils are environmentally-friendly, bio- based polyols which can be used to increase the "green" content of polyurethane foams without having detrimental effects on foam properties.