Abstract: Curable mixtures of polyepoxides and amine-terminated polymers are employed. The amine-terminated polymers are prepared by the in situ free radical polymerization of ethylenically unsaturated monomer or monomers in amine-terminated polyoxyalkylene polyether polymers.

Abstract: Stable graft polymer dispersions are prepared employing in situ free radical polymerization of ethylenically unsaturated monomer or monomers in an amine-terminated polyoxyalkylene polyether polymer. These dispersions are useful in the preparation of polyurethane foams which have improved tensile strength, elongation, load deflection and tear strength properties.

Abstract: By using a polyether polyol grafted with a suitable proportion of a suitable vinyl-type monomer with the use of a free-radical catalyst, it is possible to obtain filled or unfilled castings of thermosetting polyurethane which has excellent physical properties as well as good processing characteristics.

Abstract: Isocyanurate-modified polyisocyanate compositions prepared by reacting organic polyisocyanates in the presence of catalytic amounts of alkali metal or alkaline earth metal organo-hydroxamates or the metal salt-free acid complex at temperatures from 25.degree. C. to 250.degree. C.

Abstract: Furan-modified rigid isocyanurate foams are taught herein. The foams herein are prepared by either (1) the in situ polymerization of furfuryl alcohol and/or furfural during the foam formation reaction, or (2) the catalytic condensation of a furfuryl alcohol-blocked organic polyisocyanate.

Abstract: The addition of small amounts of organic titanium compounds to polyol compounds reduces the viscosity of said compounds.

Abstract: Highly stable liquid 4,4'-diphenylmethane diisocyanate (MDI) containing MDI-carbodiimide adducts are prepared by heating MDI at a temperature of from 180.degree. C. to 250.degree. C. for a period of from one hour to ten hours in the presence of tris(chloromethyl)phosphine oxide and thereafter equilibrating the adduct formation. Equilibration can occur by any of several methods, i.e., by cooling the composition to a temperature of from 60.degree. C. to 90.degree. C. within twenty minutes, maintaining the composition at this temperature for a period of from one hour to four hours and thereafter cooling the composition to room temperature or by cooling the composition to a temperature less than 100.degree. C. within twenty minutes, further cooling to room temperature, and maintaining the composition at room temperature for one week to two weeks. The resulting compositions have very low sediment contents and are particularly useful in the preparation of microcellular polyurethane foams.

Abstract: Polyurethane foams are prepared employing as the polyisocyanate ingredient a highly stable liquid 4,4'-diphenylmethane diisocyanate (MDI) containing MDI-carbodiimide adducts prepared by heating MDI at a temperature of from 180.degree. C. to 250.degree. C. for a period of from one hour to ten hours in the presence of tris(chloromethyl)phosphine oxide and thereafter equilibrating the adduct formation. Equilibration can occur by any of several methods, i.e., by cooling the composition to a temperature of from 60.degree. C. to 90.degree. C. within twenty minutes, maintaining the composition at this temperature for a period of from one hour to four hours and thereafter cooling the composition to room temperature or by cooling the composition to a temperature less than 100.degree. C. within twenty minutes, further cooling to room temperature, and maintaining the composition at room temperature for one week to two weeks.

Abstract: Highly stable liquid 4,4'-diphenylmethane diisocyanate (MDI) containing MDI-carbodiimide adducts are prepared by (a) heating MDI at a temperature of from 60.degree. C. to 120.degree. C. for a period of from one hour to ten hours in the presence of tris(chloromethyl)phosphine oxide, (b) stopping the carbodiimide formation by adding thereto a quenchant selected from the group consisting of magnesium chloride hydrate, stannous chloride and trichlorosilane, (c) heating the reaction mixture at a temperature between 60.degree. C. and 120.degree. C. for a period of from 0.5 hour to 6.0 hours, and (d) cooling to room temperature. The resulting compositions are highly stable and may be advantageously employed in the preparation of polyurethane compositions.

Abstract: Rigid foams characterized by carbodiimide and isocyanurate linkages are prepared by catalytically condensing an organic polyisocyanate in the presence of (a) a carbodiimide-promoting compound and (b) certain C.sub.1 -C.sub.8 alkali metal carboxylates as trimerization catalysts.

Abstract: The incorporation of chloro-alkanol moieties into a urethane-modified isocyanurate foam has been found to improve the insulating properties of the foam as well as improve the flame-retardant properties thereof.

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: Rigid foams characterized by carbodiimide and isocyanurate linkages are prepared by catalytically condensing an organic polyisocyanate in the presence of certain quaternary boron salts.

Abstract: Urethane-modified carbodiimide-isocyanurate foams are prepared by catalytically condensing (a) an organic polyisocyanate with a polyol or (b) a quasi-prepolymer in the presence of a blowing agent and from 20 parts to 100 parts by weight of alumina trihydrate. The resulting foams are characterized by improved flame retardancy without loss in strength properties.

Abstract: Urethane-modified isocyanurate foams are prepared by catalytically condensing an organic polyisocyanate in the presence of a polyol and from 5% to 50% by weight based on the weight of the organic polyisocyanurate of an ammonium phosphate. The resulting foams are characterized by improved flame retardancy and strength properties.

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: 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: 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 1000-500,000 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: Compositions of vanadyl alcoholate, organic titanate and polyhydric alcohol compounds are effective esterification and transesterification catalysts.

Abstract: New triazine compositions having incorporated therewithin both alkanolamino groups and pendent tertiary amino groups are defined herein. The triazines are prepared by the reaction of (1) an intermediate prepared from either alkyl chlorides or alkylene oxides and dialkylaminoalkyl primary amines and (2) cyanuric chloride or a derivative thereof. The triazines hereof exhibit excellent catalytic activity in the preparation of rigid cellular foams characterized by carbodiimide linkages.