Abstract: A process is provided for producing semi-rigid polyurethane foams having exceptional shock-absorbing properties, even after repeated compression, prepared by the reaction of a polyisocyanate; a polyether polyol having a molecular weight within the range from about 2,000 to about 10,000; from about 1 to about 5% by weight of water per part by weight of polyether polyol; from about 1 to about 6% by weight of urea and/or thiourea per part by weight of polyether polyol; and a cross-linking compound having at least three active hydrogen atoms per molecule that are reactive with isocyanate groups and having a molecular weight below about 1000 in an amount from about 5 to about 25% by weight per part by weight of polyether polyol; the amount of polyisocyanate being selected to give an isocyanate index within the range from about 0.7 to about 1.4.

Abstract: Oxyalkylated condensation products prepared from aliphatic and aromatic amines, epihalohydrin and alkylene oxides are used in the preparation of polyurethane foams.

Abstract: Polyurethane plastics are dyed with dyestuffs of the formula ##STR1## wherein R.sub.1 denotes hydrogen, halogen, optionally substituted C.sub.1 -C.sub.4 -alkyl, optionally substituted C.sub.1 -C.sub.4 -alkoxy and optionally substituted C.sub.1 -C.sub.4 -alkylcarbonylamino and R.sub.2 denotes hydrogen, optinally substituted C.sub.1 -C.sub.4 -alkyl and optionally substituted C.sub.1 -C.sub.4 -alkoxy, while A and B denote optionally branched alkylene chains which can be identical or different and preferably have 2 to 6 carbon atoms, with formation of covalent bonds, in that the dyestuffs are added before or during the polyaddition reaction to the reacton mixture of polyol and polyisocyanate or to one of the components.

Abstract: Disclosed herein is a polyurethane foam having good wet strength. The foam is prepared by reacting a urethane prepolymer with large amounts of water containing a poly(amino)urea and optionally other ingredients, e.g. surfactants. The poly(amino)urea is characterized as being the water soluble reaction product of a polyamine with a urethane prepolymer, said reaction product being further reacted with a crosslinking agent, e.g. epichlorohydrin.

Abstract: This invention relates to a process for the manufacture of foams based on phenolic resins, wherein phenolic resins are reacted, in the presence of metal powders and/or metal oxide powders, with organic diisocyanates and/or polyisocyanates.

Abstract: The present invention relates to modified polyols, and more particularly to polyols modified with polyisocyanates that can be employed, among other things, as components for formulations for polyurethanes or polyurethanes-isocyanurates.More particularly, the modified polyols of this invention consist of the reaction product of diols having an equivalent weight ranging from 30 to 150, with polyisocyanates having an equivalent weight ranging from 50 to 200, characterized in that said modified polyols exhibit a diol/isocyanate weight ratio comprised between 10 and 1, preferably between 5 and 1.6, and a OH/NCO equivalent ratio comprised between 3 and 50, preferably between 4 and 10.

Abstract: Covers novel polyols comprising the reaction product of a 2,3-morpholinedione and a polyoxypropylene polyamine. Said polyols or alkoxylated derivatives thereof may be used in preparing polyurethane or polyisocyanurate polymers, particularly those polymers in cellular or foam form.

Abstract: An impact energy-absorbing, relatively low density, urethane foam for use in automobile bumpers has a high content of urea linkages and is relatively temperature insensitive, i.e. gives approximately the same physical performance over a wide range of temperature. The foam is water blown in a closed mold from a quasi-prepolymer system. The pack factor is preferably in the range of 1.5 to 8 and the molded density is in the range of 5 to 20 lbs./ft..sup.3.The foam formulation is based on a polyol of a poly (oxypropylene/ethylene) triol reacted with a styrene/acrylonitrile monomer mixture which triol thus modified is reacted with (1) a 50 to 150 equivalent weight polyol cross linker of 2 to 6 functionality, (2) a MDI or TDI/glycol or triol quasi-prepolymer and (3) some water.

Abstract: The instant invention relates to a new process for splitting up polyurethane waste into activated polyhydroxyl compounds which may be reused for the production of polyurethane plastics. The process broadly comprises reacting the polyurethane waste with lactams or equilibrium associates of lactams and active hydrogen containing compounds at temperatures of from 150.degree. to 250.degree. C. If desired, the process may be conducted under elevated pressure.

Abstract: The instant invention is directed to novel hydroxyl containing compositions and the use thereof in producing polyurethane resins. The novel products disclosed herein are hydroxyl containing materials produced by alkoxylating a distillation residue obtained by distilling hexamethylene diamine from a mixture thereof with by-products obtained in the hydrogenation of adiponitrile to produce hexamethylene diamine.

Abstract: A process for producing a flame resistant polyurethane foam by reacting a reaction mixture comprising a polyetherpolyol or a polyesterpolyol having an active hydrogen atom, a polyisocyanate, water and/or a volatile foaming agent, and a catalyst, in which a specific amine compound shown by the general formula as defined hereinafter in the specification is added to the reaction system, and also the flame resistant polyurethane foam produced by the process.

Abstract: Decomposing polyurethane foams and converting the depolymerized reaction product containing amines, both aromatic and aliphatic, into polyols suitable for reaction with polyisocyanate to produce fresh polyurethane foam, by first reacting polyurethane foam with ammonia or an amine such as diethylene triamine or ethanolamine, or with a polyol such as polypropylene glycol, and reacting the resulting decomposition product containing a mixture of polyols, ureas, and amines, which can include primary and secondary amines, with an alkylene oxide such as ethylene oxide or propylene oxide, at elevated temperature, preferably about 120.degree. to about 140.degree. C., in an autoclave under autogenous pressure, to convert such amines to polyols.

Abstract: Compounds are disclosed of the formula ##STR1## wherein R designates hydrogen or an alkyl group of 1 to 6 carbon atoms, inclusive;R' designates an alkylene group of 2 to 10 carbon atoms, inclusive, or alkylene substituted by a methyl or by a halomethyl group;R" designates hydrogen, an alkyl group of 1 to 4 carbon atoms, inclusive;--R"Z, ##STR2## or C(CH.sub.2 OH).sub.3 X designates chlorine or bromine;Z designates -OH, ##STR3## n is an integer from 1 to 5; and P IS AN INTEGER FROM 0 TO 4.A process for the production of such compounds is also disclosed which comprises reacting one mole or a slight excess of a trihalogenated alkylene oxide of the formula ##STR4## wherein X, R, and p are as defined above, per mole of an alkanolamine or polyamine of the formula ##STR5## wherein R', R", Z, are as defined above, at a temperature between 30.degree. to 90.degree. C and separating the resulting halogenated nitrogen containing polyol.

Abstract: This invention relates to the use of phenol-aldehyde-amine resin/diol curatives in the production of cellular polyurethane elastomers having outstanding energy absorbing properties. The elastomers are useful as energy managing components in automobiles and the like.

Abstract: The instant invention relates to an improved process for the production of cold-hardening polyurethane foams through the reaction of modified polyisocyanates with compounds having at least two active hydrogen atoms in the presence of blowing agents. The improved process is characterized by the fact that the modified polyisocyanate is prepared in a preliminary stage immediately before foaming.

Abstract: A process for producing a rigid polyurethane foam according to one-shot method which comprises reacting a polyol component with a polyfunctional isocyanate component in the presence of a polymerization catalyst, a foam stabilizer and a foaming agent, characterized in that said polyol component consists of 35 to 65 parts by weight of a sucrose polyether and 65 to 35 parts by weight of a polyoxyalkylene glycol of trihydroxyalkylamine and has an OH number of 420 to 530. According to this process, a rigid polyurethane foam having a very low density, low friability and excellent dimensional stability at low temperatures can be obtained.

Abstract: The instant invention relates to hydroxyl polyethers which are modified with amide groups and a method of their manufacture. The method includes a first stage wherein a portion of the hydroxyl groups of a polyether polyol are aminated and a second stage wherein the amine groups are reacted with a carboxylic acid, its anhydride, ester or halide. The modified polyesters may be used for the production of polyurethane resins.

Abstract: A flame-resistant and smoke-retardant polyurethane foam is produced by reacting a polyisocyanate with a polyhydroxyl compound in the presence of an alkaline earth metal salt of a carboxylic acid and a foaming agent.