Abstract: This invention relates to a process for producing water-blown, flexible polyurethane foams for improved foam stability and molded water-blown, flexible polyurethane foams that are rapidly demoldable with improved green strength. The process involves the use of certain compounds ("foam modifiers") as hereinafter more specifically defined. The foam modifiers consist of an alkali metal or alkaline earth metal ion and an anion of a Bronsted acid having a pKa of greater than 1 (other than: (a) an inorganic alkaline earth metal salt that has a water solubility of less than one gram of salt per 100 milliliters of water at 25.degree. C., (b) alkali metal dihydrogen phosphate and (c) alkali metal sulphate).

Abstract: This invention relates to novel polymer/polyol compositions consisting essentially of a polyol and a polymer of an unsaturated monomer polymerized in the polyol. The polyols in the novel compositions are polyoxyalkylene-polyoxyethylene polyols having critical oxyalkylene and oxyethylene contents, hydroxyl functionalities, hydroxyl numbers and primary hydroxyl group contents. This invention further relates to novel polyurethanes produced from such polymer/polyol compositions and especially to novel polyurethane foams having outstanding utility as seat cushions having improved static fatigue and humidity sensitivity properties.