Abstract: A process for producing high resilience polyurethane foam utilizing as a foam stabilizer a combination of an organosilicone oil of average molecular weight 200-2000 composed of the blocks represented by the formula ##EQU1## (where a+b is 1 to 3, b is 0 or 1, R is methyl group, and R' is a hydrocarbon group of 3-15 carbon atoms) and a hydrocarbon oil of average molecular weight 200-2000 containing more than 20 wt. % of alicyclic hydrocarbon and/or aromatic hydrocarbon.

Abstract: This invention relates to an improved process for the production of a mixture of low molecular weight polyhydric alcohols, hydroxy aldehydes and hydroxy ketones by condensing formaldehyde hydrate in the presence of calcium hydroxide as catalyst and in the presence of compounds capable of enediol formation as co-catalyst. A formaldehyde-containing enediol formation as co-catalyst. A formaldehyde containing solution of the co-catalyst in water and, optionally, low molecular weight monohydric or polyhydric alcohols and/or relatively high molecular weight polyhydroxyl compounds is adjusted to a pH value of from 9 to 12, preferably from 9 to 10, by the addition of calcium hydroxide at a temperature of from 80.degree. to 110.degree. C., preferably from 90.degree. to 105.degree. C., so that condensation of the formaldehyde hydrate is initiated.

Abstract: A reaction product of a fatty acid ester and an organic polyisocyanate is included in a foamable reaction mixture containing an organic polyisocyanate to provide a molded product which can be removed from a mold whose surface has not been coated with conventional mold release agents.

Abstract: Flexible polyurethane foams having low resistance to air flow and, in addition, having good load bearing characteristics and high strength comprising the reaction product of polyisocyanate, a polyol blend including about 40-60 percent by weight of a polyether triol having an average molecular weight of about 4500-6500 and about 60-40 percent by weight of a reinforced polymer polyol having an average molecular weight of about 4500-5500 for the base polyol, and a low molecular weight cross-linking agent, such as 1,4-cyclohexanedimethanol or 4,4' methylene-bis (2-chloroaniline). Preferably the air flow characteristics are improved by crushing the reaction product before it is fully cured.

Abstract: A molding composition is disclosed for forming in a single step a natural sandwich foam product having a cellular core and a thick, densified outer layer. A hard, particulate filler material such as fly ash is admixed with an unreacted, rigid polyurethane foam system, together with a density distribution control agent such as carbon tetrachloride which lowers the viscosity of the admixture. In molding, the mold cavity is charged with the admixture and the foam reaction is permitted to occur with the mold closed. The resultant, filled foam product has a thick outer layer formed adjacent the mold surface of substantially greater density than its core. In the densified layer, both the polyurethane and filler material components of the resultant product are concentrated to provide over three times the density of the core structure. Formulations are set forth which provide substantial layer thickness and an outer surface having a durometer hardness value of 50 or greater over the entire surface area.

Abstract: This invention provides a low density (<2 pcf.) modified phenolic foam produced by combining a resole resin with a phosphorus-containing isocyanate-terminated prepolymer in the presence of a minor amount of a surfactant, a catalytic amount of an organotin catalyst, and a halocarbon blowing agent. Foam products producted by the method of the invention have a good combination of low combustibility, friability resistance and compressive strength.

Abstract: A process for producing sulfur foam containing at least 50 weight percent sulfur, which comprises: (a) reacting molten sulfur with an organic protonic acid which is reactive with molten sulfur so as to incorporate the organic acid with sulfur to form a sulfur-organic acid adduct containing protonic acid groups; (b) mixing an organic surfactant agent with the adduct to obtain a mixture of adduct and surfactant agent; and then (c) reacting the mixture with a polyisocyanate to obtain sulfur foam.