Abstract: Disclosed is a stabilized hydroxylammonium nitrate or hydroxylamine-containing composition comprising said hydroxylammonium nitrate or hydroxylamine and a pyridine or pyridone salt, or an acid thereof, said pyridine or pyridone salt, or acid thereof, being present in said composition in an amount of between about 0.0001% and about 2%, based upon the weight of said composition. Also disclosed is a process for preparing this composition.

Abstract: Para-methylstyrene is polymerized under free-radical conditions in the presence of a polyol to give grafted polymeric polyols which are suitable for use in the production of polyurethane foams.

Abstract: Novel high resilience (HR) urethane foams are prepared from tolylene diisocyanate and novel polymer/polyol compositions made with acrylonitrile and vinylidene chloride monomers. The acrylonitrile:vinylidene chloride-polymer/polyol compositions enhance the load-bearing properties and decrease the flammability of HR foams made with them.

Abstract: Fluid, stable polymer-polyols are provided which consist of an organic polyol medium and an interpolymer of a minor amount of polymerized ethylenically unsaturated dicarboxylic acid anhydride, such as maleic acid anhydride, and a major amount of at least one different polymerized ethylenically unsaturated monomer, the interpolymer being in the form of particles that are stably dispersed in the polyol. Polyurethane foams produced from these polymer/polyols display improved load bearing and compression set when compared with polymer/polyols produced in a similar manner without the ethylenically unsaturated dicarboxylic acid anhydride; elastomers so produced have improved tensile modulus and tear properties.

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.