Abstract: A polyurethane foamable composition comprising a brominated diol and three polyols is disclosed. The resulting foam formed by reacting these polyols and a diol with an isocyanate has a flame spread of 25 or less and contains a smaller quantity of halogen compounds than usually contained in polyurethane foamable compositions. This combination of polyols and flame retardant shows improved physical strengths and adhesion to primed tank substrates between temperatures of 100.degree. to 160.degree. F.

Abstract: The storage stability of otherwise unstable premix compositions for flame retardant rigid polyurethane foams containing in the premix a chlorinated polyether polyol and a tertiary amine catalyst, is enhanced by incorporation into the premix of a minor amount of a vinyl monomer. The preferred vinyl monomers employed are condensation products of acrylic or methacrylic acid with alcohols or amines. Such stabilization prevents premature deactivation of the tertiary amine catalysts contained in the premix.

Abstract: Rigid polyurethane foam is produced from polyisocyanate and polyol wherein 5-30% by weight of the polyol ingredient is a digestion product of polyalkylene terephthalate residues or scraps digested with organic polyols. The resulting rigid polyurethane foam exhibits uniform density and, when compared with a corresponding polyurethane foam which does not include the said digestion products, exhibits equivalent or superior physical strength properties. With fire retardant rigid polyurethane foams wherein the organic polyol ingredient includes halogenated organic polyols, use of 5-30% by weight of the said digestion product in the organic polyol ingredient, achieves a rigid fire retardant polyurethane foam having a lower flame spread and a lower smoke generation than a corresponding polyurethane foam which does not include the said digestion product. When fabricated in a closed mold, the present rigid polyurethane foam has a more uniform density, i.e.

Abstract: A catalytically stabilized polyol composition is disclosed for use in the production of polyurethane foam. The composition comprises a halogenated polyol and an acid-blocked amine catalyst.

Abstract: An oxyalkylated product useful for making polyurethane foams is prepared by reacting an alkylene oxide with a heated mixture of a phenol and a non-phenolic active hydrogen compound, at least one of which can be halogenated, in the presence of a catalyst complex of a phenol and an iron or aluminum substance. The mixture can also include a neutral phosphorus compound and/or acid anhydrides to enhance flame retardant properties. Optionally, also, the oxyalkylation reaction can be terminated by adding a tri (lower alkyl) amine and alkylene oxide to react with residual phenolic hydrogen in the mixture.

Abstract: Liquid oxyalkylated polyol prepolymers are prepared by oxyalkylating a prepolymer prepared from a hydroxy aromatic compound, an aldehyde and furfuryl alcohol with an alkylene oxide containing about 2-4 carbon atoms. The oxyalkylated polyol prepolymers have a viscosity of 1,000-500,000 centipoises at 25.degree. C. and contain about 1.1-6 moles of interpolymerized aldehyde, about 3.1-15 moles of interpolymerized furfuryl alcohol, and about 1-10 moles of interpolymerized alkylene oxide for each mole of interpolymerized hydroxy aromatic compound. The resultant prepolymers are highly reactive and may be further polymerized with or without monomers such as polyisocyanate to produce flame retardant solid or cellular interpolymers. Flame retardant solid or cellular polyurethanes are prepared in one variant by interpolymerizing organic polyisocyanates with the oxyalkylated polyol prepolymers. In another variant, flame retardant closed cell cellular interpolymers are provided.

Abstract: Flame retarded polyurethane foams are prepared from a reaction mixture comprising as the flame retardant additive a compound containing 2,2,2-trichloroethyl group.

Abstract: The instant invention is broadly directed to novel polyether esters and the use thereof in manufacturing polyurethane resins. The novel products are produced by esterifying an alkoxylated, halogenated bisphenol, a polycarboxylic acid and a dihydric alcohol.

Abstract: Liquid prepolymers are prepared by interpolymerizing monomers including a hydroxy aromatic compound, an aldehyde and furfuryl alcohol. The resultant liquid prepolymers have a viscosity of about 100-500,000 centipoises at 25.degree. C. and contain about 1.1-6 moles of interpolymerized aldehyde and about 3.1-15 moles of interpolymerized furfuryl alcohol for each mole of interpolymerized hydroxy aromatic compound. The prepolymers are highly reactive and may be polymerized with or without other monomers to produce flame retardant solid or cellular interpolymers. In one variant, flame retardant solid or cellular polymers are produced by interpolymerizing organic polyisocyanates with the prepolymers. In another variant, solid or cellular interpolymers are produced by polymerizing the prepolymers without monomers such as polyisocyanate in the presence of unreacted furfuryl alcohol. Processes are provided for preparing the aforementioned novel liquid prepolymers and solid or cellular interpolymers.

Abstract: Novel stabilized polyhalogenated polyol blends are disclosed which include in the blend a catalytic amount of a tertiary amine urethane catalyst and a stabilizing amount of a particular diepoxide. The polyol blends retain the same catalytic reactivity for reaction with organic polyisocyanates to form polyurethane foams over extended storage periods and are also stable with respect to blend viscosity. The polyurethane foams prepared from the stabilized polyol blends are characterized by excellent flame resistance and low smoke evolution when tested according to the ASTM E-84 test. The stabilized polyol blends provide an efficient means for reducing the number of polyurethane forming components or streams that need be stored, handled, or pumped to a polyurethane foam mixing apparatus.

Abstract: Compounds having the formula ##STR1## where X is a halogen, ester, hydroxyl, alkoxy, amine, cyanide, or isocyanate radicals. These compounds are useful as flame retardant additives for polymers, especially for polyurethane foams.