Abstract: The present invention relates to a process for the preparation of highly flexible polyurethane plastics which are resistant to chemicals by reactinga) a polyisocyanate component withb) a polyol component based on a liquid polybutadiene resin containing terminal hydroxyl groups and having a molecular weight of about 500 to 10,000 andc) about 10 to 50% by weight of water, based on the weight of component b), in the presence ofd) about 20 to 500% by weight, based on the weight of component b), of an alkaline earth metal hydroxide or oxide.The present invention also relates to the highly flexible polyurethane plastics, especially coatings, produced by this process.

Abstract: A method for making a polyurethane elastomer tire fill composition wherein a mixture of a) a low functionality (2.0-2.3) 4,4'-diphenylmethane diisocyanate, such as a carboiimide-modified (2.0 functionality) 4,4'-diphenylmethane diisocyanate and b) a nonreactive diluent, such as an oil extender, is mixed with a polyol, such as polypropylene oxide triol. The reaction mixture is inserted into a tire casing under pressure and cured therein to form an essentially void-free tire filler. The tire fill composition maintains pressure within the tire during use and has excellent physical and thermal properties. No prepolymer step is necessary in the method.

Abstract: Rigid polyurethane-modified polyisocyanuate compositions having improved physical properties are obtained by curing thermosettable compositions containing alkoxylated aromatic compounds, organic polyisocyanates and cyclic alkylene carbonates using an isocyanate trimerization catalyst. The use of an alkoxylated aromatic compound permits a reduction in the proportion of organic polyisocyanate required to achieve satisfactory tensile strength and stiffness. The cured compositions are useful for the production of composites as well as molded articles containing reinforcing fillers.

Abstract: A polycarbonate polyol having a main chain of the formula: ##STR1## wherein R is an aliphatic or alicyclic hydrcarbon group having 4 to 10 carbon atoms, and n is a number of 2.00 to 20.

Abstract: This invention relates to a method of producing particulate polymers. This production method is characterized in that a mixture of an isocyanate compound containing two or more isocyanato groups per molecule and a surfactant containing two or more hydroxyl groups per molecule is emulsified and allowed to cure in a dispersing medium which does not dissolve the isocyanate compound without use of a protective colloid. According to the production method of the invention, there occurs no aggregation of polymer particles during and after the curing reaction.

Abstract: Polyhydantoins useful in coating materials, films, adhesives and moldings are prepared by reacting polyfunctional .alpha.-aminocarboxylic acids, organic polyiso(thio)cyanates and carboxylic acid compounds in the presence of a condensed aromatic hydrocarbon at a temperature of 0.degree. to 500.degree. C.

Abstract: The present invention relates to a process for the production of an isocyanurate group-containing polyisocyanate by(a) partially reacting the isocyanate groups of an organic diisocyanate containing aliphatically and/or cycloaliphatically bound isocyanate groups in the presence of an ammonium or phosphonium fluoride trimerization catalyst,(b) introducing carbon dioxide into the reaction mixture at least periodically during the reaction and(c) terminating the reaction at the desired degree of conversion.The present invention also relates to the isocyanurate group-containing polyisocyanates obtained in accordance with this process.

Abstract: Improved reinforced polyurethane/urea articles are made by reacting an organic polyisocyanate with low viscosity imino/enamine-functional compounds in contact with fiberous reinforcing agents.

Abstract: Flakeboard or particle board panels and other composite articles made from wood flakes or other particulate lignocellulosic materials having a relatively high internal bond and improved resistance to moisture are made from flakes or particles which have a moisture content of at least 15%. A catalyst capable of accelerating the reaction between the flakes or particles, the binder and water is applied to the flakes or particles prior to the addition of a moisture-tolerant particle board binder, such as an organic polyisocyanate. A mat of the resulting furnish is compression shaped under pressure and at a temperature less than 250.degree. F. for a time period sufficient to form a composite article of the desired shape and/or dimensions.

Abstract: The present invention is directed to catalysts obtained by mixing alkali fluorides with quaternary ammonium or phosphonium salts.The present invention is also directed to a process for the production of these catalysts by stirring alkali fluorides and quaternary ammonium or phosphonium salts in alcohol, separating any deposits formed, removing the alcohol and converting the catalyst into useful form by dilution in solvents or absorption onto support materials.Finally, the present invention is directed to the use of the new catalysts as trimerization catalysts for the production of polyisocyanates containing isocyanurate groups.

Abstract: The present invention is directed to a process for the direct production of a pigmented thermoplastic polyurethane powder in finely divided form by(a) reacting with agitation at an overall equivalent ratio of isocyanate groups to isocyanate reactive groups of about 0.5 to 1.1(i) a surfactant-stabilized emulsion of fine droplets of a first reactant which has an average of about two isocyanate or isocyanate reactive groups in admixture with at least one pigment with(ii) a second reactant which contain an average of about two isocyanate or isocyanate reactive groups,in an inert organic liquid in which the first reactant, the pigment and the powder are substantially insoluble or immiscible to form particles of the powder which are protected from agglomeration by the surfactant, and(b) separating the particles of the powder from the inert organic liquid.The present invention is also directed to the pigmented thermoplastic polyurethane powders obtained by this process.

Abstract: Disclosed are thermosetting, powder coating compositions comprised of semi-crystalline polyesters and .epsilon.-caprolactam-blocked bis(1-cyanato-1-methylethyl) benzene compounds which are readily curable at relatively-mild temperatures and using cure times commonly used to cure (cross-link) powder coatings. When using equivalent curing conditions, the disclosed coating compositions exhibit a higher degree of cross-linking than do combinations of amorphous polyesters and the .epsilon.-caprolactam-blocked bis(1-cyanato-1-methylethyl)-benzene compounds.

Abstract: The present invention relates to a process for strengthening geological formations in underground mining or underground construction work by the introduction of reaction mixtures which react to form polyurethane plastics into the formations which are required to be strengthened, wherein the reaction mixtures are based on(a) a polyisocyanate component,(b) a polyol component and(c) at least one auxiliary agent or additive, characterized in that component (c) contains a cyclic polydimethylsiloxane in the molecular weight range of 222 to 740 and in a quantity of about 0.01 to 5.0% by weight, based on the total weight of components (a) and (b).

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 coating 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: The present invention is directed to a process for the production of isocyanurate polyisocyanates containing aliphatically and/or cycloaliphatically bound isocyanate groups by trimerizing a portion of the isocyanate groups of organic diisocyanates containing aliphatically and/or cycloaliphatically bound isocyanate groups in the presence of a trimerization catalyst and terminating the trimerization reaction at the desired degree of trimerization by the addition of a catalyst poison, characterized in the quaternary ammonium fluorides are used as the catalyst.The present invention is also directed to the use of these isocyanurate polyisocyanates for the production of polyurethane lacquers.

Abstract: Lacquer binders suitable for the production of highly heat-resistant films and coatings consisting of a mixture of(a) polyamide-imides based on trimellitic anhydride, lactams and diisocyanates,(b) organic compounds carrying (i) carbodiimide and/or uretone imine groups and (ii) blocked isocyanate groups and optionally,(c) auxiliaries and additives.The use of these binders in coating compositions for heat-resistant substrates and a process for the production of wire enamels using said coating compositions.

Abstract: An aromatic polyamide is produced by subjecting an aromatic diisocyanate and an aromatic dicarboxylic acid to polycondensation in the presence of an alkali metal compound and/or an alkaline earth metal compound as a catalyst in an aprotonic polar solvent. The aromatic polyamide can be rendered suitable for use in the production of high-tenacity fibers by charging in advance the solvent, aromatic dicarboxylic acid and catalyst in a mixing system, reducing the water content in the mixing system to at least 50 ppm and then introducing the aromatic diisocyanate to conduct the polycondensation.

Abstract: A method of preparing a consolidating agent in the form of a polyurethane prepolymer for consolidating a proppant in a subterranean formation about a well employing the improvement characterized by a quasi prepolymer formed by reacting a diol with a stoichiometric excess of isomeric methylene diphenylene diisocyanate and a diluent; and allowing the reactants to stand for a period in excess of two hours at 25 degrees C., whereby to form oligmers of polyurethane chains. The method enables consolidating a proppant in fractures by a slow polymerization process, whereby the curing agent can be added at the same time the proppant is placed. Also disclosed are specific examples of diluents and curing agents.

Abstract: Ammonium sulfate powder is employed, alone, or in conjunction with a weakly basic powder to neuturalize the acidity of the sulfate, as a flame retardant for isocyanate-based foams and, in particular, rigid and flexible polyurethane foams.

Abstract: Hybrid resins result from the combination of the urethane and unsaturated polyester technology. Improved resin casting and laminate properties are obtained when polyalkylene terephthalate unsaturated polyesters are employed, in lieu of the isophthalic polyesters of the prior art. Especially notable are improved heat distortion temperatures which exceed substantially those of the isophthalic based resins. The economics of using such terephthalate resins is demonstrated. Also within the scope of the present invention is the use of secondary hydroxyl compounds in the preparation of the polyesters. It has previously been believed that such compounds led to embrittlement of the final hybrid.

Abstract: The present invention is directed to an isocyanate-functional composition useful for forming a coating, adhesive, elastomer, or like article. Cure of the composition preferably involves trimerization of the isocyanate groups in the presence of an amino catalyst including a tertiary amine, an amine salt, and quaternary ammonium salts. The novel catalyst system used in achieving cure of the isocyanate-functional compound-containing liquid curable composition comprises an amino catalyst and an ortho-carboxylic acid ester.

Abstract: A finishing agent for finishing fibers or fiber products is disclosed. The agent is a mixture of the following components:(a) 34 to 99% by weight of a polymer of the general formula ##STR1## in which R.sup.1 is a z-hybric aliphatic alcohol, z=2 to 9, m=20 to 75, n=0 to 10, p=0 to 3,(b) 0 to 55% by weight of a copolymer, obtained by copolymerization of(b.sub.1) one mole of a macromonomer of the general formula ##STR2## in which q=5 to 75, r=0 to 10, s=0 to 3, with (b.sub.2) 2 to 12 moles of a vinyl ester of the general formula CH.sub.2 .dbd.CHOCOR.sup.2, in which R.sup.2 is an alkyl group with 1 to 4 carbon atoms,(b.sub.3) 1 to 6 moles of N-vinylpyrrolidone,(b.sub.4) 0 to 6 moles of an acrylate or methacrylate ester of the general formula CH.sub.3 .dbd.CR.sup.3 --COOR.sup.4, in which R.sup.3 .dbd.H or CH.sub.3, R.sup.4 is an alkyl group with 1 to 4 carbon atoms, the quotient of the average molecular weight of the monomer (b.sub.1) and the number of moles of the monomers (b.sub.2), (b.sub.3) and (b.sub.

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: The present invention relates to a method for hot curing thermosetting resins and vulcanizable elastomers, based on the use of perfluoropolyethers in the liquid state as heat transfer media.

Abstract: The invention relates to organomineral products of high strength obtainable by reacting a polyisocyanate in an aqueous alkali silicate solution in the presence of a catalyst prompting the trimerization of the polyisocyanate. In preparing them, the catalyst is used in an amount of 5.5 to 14.5 mmole per mole of NCO groups in the reaction mixture. The organo-mineral products of the invention are suitable as construction, coating, sealing or insulating materials or as putty or adhesives.

Abstract: Polyhydantoins of the general formula ##STR1## in which X stands for a bivalent aliphatic, aromatic or araliphatic radical,R.sup.1 denotes --CH.sub.2 --, ##STR2## --O--, --SO.sub.2 --, --C(R.sup.5,R.sup.6) R.sup.2 and R.sup.3 are identical or different and stand for hydrogen, C.sub.1 -C.sub.6 -alkyl or together stand for --(CH.sub.2).sub.4 --or --(CH.sub.2).sub.5 --andR.sup.5 and R.sup.6 are identical or different and stand for C.sub.1 -C.sub.6 -alkyl or together stand for --(CH.sub.2).sub.4 --or --(CH.sub.2).sub.5 --,are valuable high temperature-resistant polymers, which have utility in particular as film materials.

Abstract: An organic condensation polymer made by reacting in solution of first compound having at least two anionic carbon sites bonded to each other either directly or through a chain of 1 to 30 carbon atoms, including a bisacetylide or a first compound having an anionic carbon site and a latent anionic carbon site bonded to each other either directly or through a chain of 1 to 30 carbon atoms, such as organometallic cyclopentadienides, with a second compound containing at least two electrophillic carbon sites bonded to each other either directly or through a chain of 1 to 30 carbon atoms, including diesters, dihalides, diamides or dianhydrides of polycarboxylic acids, and diisocyanates.

Abstract: Polyamines containing primary amino groups are made by a one-shot process for the hydrolysis of prepolymers containing isocyanate end groups and having an isocyanate content of from 0.5 to 40 weight % with 0.75 to 40 mol of water per equivalent of isocyanate groups in the presence of very small quantities of sodium hydroxide in certain organic, polar solvents. The compounds containing isocyanate groups used for this process are isocyanate prepolymers (preferably containing urethane groups). Hydrolysis according to this process leads directly to the polyamines with elimination of carbon dioxide. These polyamines may be isolated by the usual methods and the removal of the small quantities of catalyst may advantageously be omitted. These polyamines are useful for the preparation of polyurethane(urea)s.

Abstract: Polyamines are produced by hydrolyzing isocyanate compounds having an NCO content of from 0.5 to 40 wt. % with from 0.75 to 40 moles of water per equivalent of NCO groups in the presence of from 0.021 to 0.099 wt. % sodium hydroxide and at least 10 wt. % water-miscible polar organic solvent containing nitrile, ketone, sulfoxide or ether groups having a boiling point of from 56.degree. to 250.degree. C. The reaction mixture is maintained in a homogeneous phase. The reaction is carried out at 40.degree. to 170.degree. C. These polyamines are useful in the production of polyurethane(urea)s.

Abstract: Polyamines are produced by hydrolyzing an isocyanate compound in the presence of at least one of a selected group of catalysts and a water miscible polar organic solvent in substantially homogeneous phase at 40.degree.-170.degree. C. The catalyst employed is selected from potassium hydroxide, rubidium hydroxide, cesium hydroxide, potassium alcoholates, rubidium alcoholates, cesium alcoholates, potassium carboxylates, rubidium carboxylates and cesium carboxylates. These polyamines are useful in the production of polyurethane(urea)s.

Abstract: An antistatic agent containing a cationic and/or amphoteric, water-soluble or water-dispersible and heat-reactive blocked urethane prepolymer as an essential component, said prepolymer having at least one cationic group and/or at least one amphoteric group in its molecule and having isocyanate groups blocked with a thermally dissociable blocking agent. The antistatic agent is applicable to various materials and can give the antistatic property with the water repellency, which can be kept for a long term, to the materials.

Abstract: The present invention provides a two component polyurethane system with excellent wetting properties for casting a supported or unsupported, expanded polytetrafluoroethylene structure. It consists essentially of a polyisocyanate component having an isocyanate functionality of 2.2 or less and a polyol blend having an overall hydroxyl functionality of 2.2 or less and a viscosity of less than 500 cps., preferably 200 cps. or less. The polyol blend consists essentially of (i) a linear polyether or polyester (about 200-2500 molecular weight), (ii) a diol or triol (less than 200 molecular weight), and (iii) a catalyst in an amount sufficient to provide gelling at greater than 2 minutes and less than 10 minutes. The isocyanate to hydroxyl ratio is between 0.95:1 and 1.10:1. In some cases, it is desirable to include selected siloxane surfactants when polyol blends with the higher viscosities, i.e., about 200-500 cps., are used. The casting system is useful for making membrane filters.

Abstract: The present invention is directed to the stabilization of a prepolymer based on methylene diphenyl isocyanate rich in the 2,4'-isomer. It was surprisingly found that the color stability, viscosity and aging characteristics of the prepolymer are improved markedly upon the incorporation therewith of a combination of a certain epoxide compound and a hindered phenol.

Abstract: A process for making polyurethane polyacetal elastomers useful as binders in the fabrication of high energy explosives or propellants having low vulnerability to unwanted detonation. Also claimed is the elastomer product so produced.

Abstract: A polyurethane adhesive composition which comprises a mixture of a polyisocyanate blocked with a phenolic blocking agent and a polyamine curing agent and optionally may contain a polyepoxide is described.

Abstract: There are provided low temperature, storage stable, liquid mixtures of (1) isocyanato-containing prepolymers obtained from the reaction of linear and/or slightly branched polyols and a polyisocyanate characterized by a methylene group --CH.sub.2 -- bonded to two benzenoid nuclei, and (2) a non-hydroxyl-containing flow modifier which is compatible with the said prepolymer. Novel liquid mixtures thus prepared exhibit little tendency to crystallize or phase separate when stored for prolonged periods of time, i.e., well below room temperature for several days.

Abstract: A polyamide and/or polyimide is prepared by using N,N'-dimethylethyleneurea or N,N'-dimethylpropyleneurea as a solvent upon polycondensation of a polycarboxylic acid and a diisocyanate at a temperature above 100.degree. C. in the presence of an alkali metal carbonate, alkali metal hydrogencarbonate, alkali metal hydroxide or an alkali metal salt of a polycarboxylic acid.

Abstract: Polymers having substituted urea groups, and molded objects therefrom, can be made by reacting, in a reaction injection molding (RIM) process, a composition comprising (A) a polyisocyanate and (B) a mixture comprising an imino functional resin and a chain extender. The chain extender may also be imino functional.

Abstract: Molded articles are produced in a two-stage process. In the first stage, an organic polyisocyanate is reacted with an organic compound containing at least two epoxide groups (NCO: epoxide equivalent ratio of 1.2:1 to 500:1) in the presence of a tertiary amine catalyst. This reaction is stopped when no more than 65% of the isocyanate groups have reacted by adding an alkylating sulfonic acid alkyl ester of methyl iodide and/or of dimethyl sulfate in an amount equivalent to the amount of tertiary amine catalyst present. A latent catalyst capable of being activated by heat is subsequently added to the intermediate product and the resultant mixture is heated in a mold to complete the crosslinking of the intermediate product and to form the molded article.

Abstract: A coating composition contains;A. an ungelled Michael adduct formed by reacting, under conditions sufficient to form a Michael adduct,(a) a material containing one or more primary and/or secondary amino groups and at least two hydroxyl groups;(b) a material containing at least two alpha,beta-ethylenically unsaturated moieties; with the proviso that the reactants (a) and (b) are selected such that the resultant Michael adduct contains hydroxyl functionality; andB. a curing agent adapted to crosslink with the hydroxyl functionality present on the Michael adduct; said adduct being stable under the curing conditions for the coating composition.The aforedescribed coating compositions are particularly useful as anti-chip primers.

Abstract: Diisocyanates and isomeric mixtures of diisocyanates corresponding to the formula ##STR1## in which R.sub.1, R.sub.2, R.sub.3, m and n are as defined herein are made by phosgenating diamines corresponding to the formula ##STR2## in which R.sub.1, R.sub.2, R.sub.3, m and n are as defined herein at a temperature of from -20.degree. to 250.degree. C. These diisocyanates are particularly useful as starting materials for the production of polyurethanes by the isocyanate polyaddition process.

Abstract: A resin composition for use in cationic electrodeposition paints, said composition comprising a cationic resin and a blocked polyisocyanate compound as a curing agent component, said blocked polyisocyanate compound containing per molecule one low-temperature dissociating blocked isocyanate group having a blocking agent dissociating temperature of 60.degree. to 120.degree. C. and at least one high-temperature dissociating blocked isocyanate group which dissociates the blocking agent as a temperature higher than said dissociating temperature by at least 40.degree. C.

Abstract: A stable, nonaqueous polyurethane microparticle dispersion is characterized in that less than 20 percent of the polymer microparticles have a mean diameter greater than 5 microns, further characterized in that at a total solids content of 60 percent the Brookfield viscosity is less than 1000 centipoise measured at 50 RPM using a number 3 spindle at 25.degree. C., the polyurethane being prepared from reactants which are substantially free of acrylic polymer and the polyurethane being further characterized in that it is substantially free of unreacted polyisocyanate monomer.

Abstract: Disclosed herein are allylether-functional unsaturated polyester-urethanes and curable compositions containing the same.

Abstract: A protective composition which comprises at least one aliphatic polyisocyanate, at least one aromatic polyisocyanate and a solvent.

Abstract: A two-pot vapor curable acrylic polymer formulation which is crosslinkable with a diisocyanate crosslinking agent. The solvent used is water free and has a good evaporation rate in an acrylic urethane polymer system. The preferred acrylic polymer has a molecular weight below 10,000 and a content of 15 to 50% by weight of an hydroxy unsaturated acrylic monomer. The remaining acrylic or unsaturated monomers are selected to provide the final polymer with a glass transition temperature in the preferred range of -10.degree. C. to 30.degree. C. These two-pot formulations exhibit high initial hardness as well as forming tough coatings within 24 hours of curing.

Abstract: Process for insulating by impregnation an electric winding with isocyanurate and oxazolidone cycles resins, in which one wraps around the conductors a glass cloth and porous mica paper tape loaded with a quaternary ammonium salt catalyzing the condensation of the isocyanate and epoxy compounds into isocyanurate and oxazolidone cycles, one impregnates the tape with a varnish containing an isocyanate compound and a liquid epoxy resin, then one subjects the impregnated tape to a varnish polymerization thermal treatment. One uses as a quaternary ammonium salt a benzyl-trialkylammonium halide with an alkyl chain containing at the most 3 carbon atoms.

Abstract: Two pack structural adhesive compositions are disclosed which in addition to exhibiting long pot life and rapid cure possessing exceptional bond strength. The adhesive system comprises a mixture of organic isocyanate, a polymeric polyol comprised of a graft copolymer of poly(alkylene oxide) polyol and acrylonitrile or a acrylonitrile and styrene and a latent catalyst.

Abstract: Organic polyisocyanates characterized by allophanate linkages are prepared by reacting an organic polyisocyanate with a mono- or polyhydric compound in the presence of an organo metal catalyst. The catalyst is then deactivated using a compound such as an inorganic acid, organic acid, organic chloroformate or an organic acid chloride. The isocyanates are useful in preparing polyurethane foams.

Abstract: Process for producing molded polyurethane parts using as internal release agents, compounds of the general formula ##STR1## in amounts of 0.5 to 10 weight percent, based on the reaction formulation, in which at least one R.sup.2 radical in the average molecule represents ##STR2## R.sup.3 is a divalent hydrocarbon radical with 2 to 4 carbon atoms and R.sup.4, R.sup.5 are univalent hydrocarbon radicals or together are part of a morpholine or a piperazine ring. The molded polyurethane parts can be removed from the mold using significantly lower tensional forces without residues being built up on the mold.