Abstract: The polyurethanes and polyureas resulting from ambient-temperature-curing isocyanate-terminated urethane prepolymers with N-alkyl-substituted aromatic polyamines and, optionally, with an added polyol, but primary amine-free, in the presence of a combination catalyst comprising an aliphatic carboxylic acid, e.g., adipic, stearic, oleic acids, and an organometallic catalyst containing, e.g., tin, mercury, bismuth, etc. are broadly useful as coatings on the surface of objects made of metal, wood, glass, plastic or masonry materials such as concrete, bricks, etc. or as castings cured in situ. One-shot and quasi-prepolymer systems are also disclosed. The diamine N,N'-di-(sec-butyl)-4,4'-methylenedianiline is a particularly useful diamine.

Abstract: Alkylated polyamines which may be viewed as low molecular weight polymers of x-amino-y-methylenephenyl are effective curing agents in combination with other polyamines and polyols in reaction injection molding for a diverse class of polyisocyantates. Alkylation may range from 5 up to 100 percent to afford polyamines with a broad spectrum of cure times, as well as to give elastomers with an interesting and useful diversity of properties. Such polyamines may be used as a constituent in a blend of polyamines as the isocyanate-reactive component, in which case the elastomer may be viewed as predominantly a polyurea, or as a constituent in a blend with polyols, in which case the elastomer may be viewed as an elastomer with both urethane and urea segments.

Abstract: N,N'-dialkyl- and diaylphenylenediamines are effective curing agents in combination with other polyamines and polyols in reaction injection molding for a diverse class of polyisocyanates. The diamines provide a broad spectrum of cure times, as well as giving elastomers an interesting and useful diversity of properties. Such polyamines may be used as a constituent in a blend of polyamines as the isocyanate-reactive component, in which case the elastomer may be viewed as predominantly a polyurea, or as a constituent in a blend with polyols, in which case the elastomer may be viewed as an elastomer with both urethane and urea segments.

Abstract: N,N'-disubstituted diamines are effective curing agents in combination with other polyamines and polyols in reaction injection molding for a diverse class of polyisocyanates. The diamines provide a broad spectrum of cure times, as well as giving elastomers an interesting and useful diversity of properties. Such diamines may be used as a constituent in a blend of polyamines as the isocyanate-reactive component, in which case the elastomer may be viewed as predominantly a polyurea, or as a constituent in a blend with polyols, in which case the elastomer may be viewed as an elastomer with both urethane and urea segments.

Abstract: The polyureas resulting from curing polyfunctional isocyanates having at least three isocyanate groups with a N,N'-dialkylmethylenedianiline are broadly useful as coatings on the surface of objects made of metal, wood, glass, or plastic. The diamine N,N'-di(2-butyl)4,4'-methylenedianiline is a particularly useful diamine. Biurets are an especially desirable class of polyisocyanates for the polyureas of this invention, particularly those arising from polymethylene diisocyanates and aromatic diisocyanates.

Abstract: Vinyl ether terminated urethane resins may be prepared by reacting the product obtained by the addition of acetylene to an organic polyol with an isocyanate-containing compound at temperatures ranging from about ambient to about 125.degree. C. The thus prepared resin may then be cured by irradiation from an electron beam, thermally or by exposure to an ultraviolet light to cure the resin and form a coating material.

Abstract: Partially alkylated polyamines which may be viewed as low molecular weight polymers of x-amino-y-methylenephenyl are effective curing agents in combination with other polyamines and polyols in reaction injection molding for diverse class of polyisocyanates. Alkylation may range from 5 up to 100 percent to afford polyamines with a board spectrum of cure times, as well as to give elastomers with an interesting and useful diversity of properties. Such polyamines may be used as a constituent in a blend of polyamines as the isocyanate-reactive component, in which case the elastomer may be viewed as predominantly a polyurea, or as a constituent in a blend with polyols, in which case the elastomer may be viewed as an elastomer with both urethane and urea segments.

Abstract: Urethane prepolymers cured with a blend of an aromatic alkyl diamine and a polyhydric alcohol having more than two hydroxyl groups show excellent compression set and tensile properties. Ratios of diamine to alcohol in the blend, expressed as equivalents, may vary from 1:1 to 19:1, with optimum properties in the elastomer often resulting from blends with the ratio 2:1 to 4:1.

Abstract: The polyurethanes resulting from curing isocyanate-terminated urethane prepolymers with a N,N'-dialkylmethylenedianiline are broadly useful as coatings on the surface of objects made of metal, wood, glass, or plastic. Such coatings may be made based on either a 1-pack systemor 2-pack system. The diamine N,N'-di(2-butyl)4,4'-methylenedianiline is a particularly useful diamine.

Abstract: Largely alkylated polyamines which may be viewed as low molecular weight polymers of x-amino-y-methylenephenyl are effective curing agents for a diverse class of urethane prepolymers. The resulting polyurethanes are thermosetting polymers with excellent compression set and tensile strength. Because the properties of the resulting polyurethane vary only slightly near the optimum stoichiometry of curing agent-prepolymer, the use of the curing agents of this invention presents the advantage of being very tolerant of operator mixing error.

Abstract: The polyurea resulting from curing polyfunctional isocyanates having at least three groups with a N,N'-dialkylmethylenedianiline are broadly useful as coatings on the surface of objects made of metal, wood, glass, or plastic. Such coatings may be made based on either a 1-pack system or 2-pack system. The diamine N,N'-di(2-butyl)4,4'-methylenedianiline is a particularly useful diamine. Biurets are an especially desirable class of polyisocyanates for the polyureas of this invention.

Abstract: Polyurethanes may be conveniently made by curing isocyanate-terminated urethane prepolymers with a N,N'-dialkylmethylenedianiline. The diamine N,N'-di(2-butyl)-4,4'-methylenedianiline is a particularly useful diamine. The resulting polyurethanes often are thermoplastic rather than thermosetting, making them especially useful as coatings, adhesives, and sealants. Such secondary aromatic diamines have acceptable pot lives and afford products with a variety of properties.

Abstract: A general method of resolution of chiral alcohols is based on the relatively facile chromatographic resolution of their diastereomeric esters with optically active amino acids. The naturally occurring L-amino acids and D-(-)-phenylglycine are especially useful, and the method is applicable to a range of alcohols of diverse structure.

Abstract: Aromatic azopolymers can be prepared in generally high yield by oxidatively coupling aromatic diamines using perborate salts. Glacial acetic acid is an effective solvent, and the presence or boric acid in the reaction medium sometimes improves product yield. Polymer yields over 70% generally are observed.

Abstract: The polymers resulting from reaction of a 1,1,2,2-tetrahaloethane with a diamine of the type H.sub.2 NANH.sub.2, where A is a divalent aromatic moiety, may be doped with a variety of materials to afford electrically conducting polymeric compositions. Poly(ethyleneiminobenzene) is an especially useful material which may be prepared in good yield from the reactants in a dipolar aprotic solvent in the presence of a base.

Abstract: The polymers resulting from reaction of a .alpha.,.alpha.,.alpha.',.alpha.'-tetrahaloxylene with a diamine of the type H.sub.2 NANH.sub.2, where A is a divalent aromatic moiety, may be doped with a variety of materials to afford electrically conducting polymeric compositions. Both p-type and n-type conductors may be formed either by chemical or electrochemical doping procedures.

Abstract: Secondary and tertiary alkyl halides, benzyl halides, and activated phenyl halides may be hydrolyzed in a 2-step procedure in good yield and under relatively mild conditions. The halide first is heated with dimethyl sulfoxide so as to form an intermediate or complex which is subsequently hydrolyzed with great facility upon contact with water, even at room temperature. The process is particularly applicable to water-insoluble organic halides.

Abstract: The polymers resulting from reaction of a 1,1,2,2-tetrahaloethane with a diamine of the type H.sub.2 NANH.sub.2, where A is a divalent aromatic moiety, may be doped with a variety of materials to afford electrically conducting polymeric compositions. Poly(ethyleneiminobenzene) is an especially useful material. Both p-type and n-type conductors may be formed.

Abstract: The polymers resulting from reaction of a .alpha.,.alpha.,.alpha.',.alpha.'-tetrahaloxylene with a diamine of the type H.sub.2 NANH.sub.2, where A is a divalent aromatic moiety, may be doped with a variety of materials to afford electrically conducting polymeric compositions. Both p-type and n-type conductors may be formed either by chemical or electrochemical doping procedures.

Abstract: Although poly(nitrilo-1,4-phenylene nitrilomethylidine-1,4-phenylene methylidine) is an insulator, it can be doped with both electron acceptors and electron donors to afford p- and n-type semiconductors. The iodine doped material is more stable in air than many prior art conducting polymers.