Abstract: Systems and methods are provided that involve a subcritical water reaction to recycle the cellulose and polyester components of waste cotton and cotton/polyester blend textiles that would otherwise be discarded or disposed of. Specifically, the disclosed methods provide for treatment of the waste textiles to produce advanced materials including cellulose and terephthalic acid (TPA) with a low environmental impact. The cellulose and TPA that are produced are of a high quality allowing for production of regenerated cellulose and regenerated polyethylene terephthalate (PET) suitable for fiber spinning and textile applications.

Abstract: A vapor compression system (20) has: a centrifugal compressor (22) having an inlet (40) and an outlet (42); and an electric motor (28) having a stator (30) and a rotor (32). A plurality of bearings (36) support the rotor. A refrigerant charge comprises a base refrigerant and one or more oils. The one or more oils are present at a total concentration of 80-5000 parts per million (ppm) by weight.

Abstract: Systems and methods are provided that involve a subcritical water reaction to recycle the cellulose and polyester components of waste cotton and cotton/polyester blend textiles that would otherwise be discarded or disposed of. Specifically, the disclosed methods provide for treatment of the waste textiles to produce advanced materials including cellulose and terephthalic acid (TPA) with a low environmental impact. The cellulose and TPA that are produced are of a high quality allowing for production of regenerated cellulose and regenerated polyethylene terephthalate (PET) suitable for fiber spinning and textile applications.

Abstract: The invention relates to hydrophilic, aliphatic polyurethane foams, which are accessible by reacting hydrophilic polyisocyanates in the presence of water. Due to the absorption properties thereof, the polyurethane foams are in particular suited for producing wound dressings, cosmetic articles or incontinence products.

Abstract: Nanoporous three-dimensional networks of polyurethane particles, e.g., polyurethane aerogels, and methods of preparation are presented herein. Such nanoporous networks may include polyurethane particles made up of linked polyisocyanate and polyol monomers. In some cases, greater than about 95% of the linkages between the polyisocyanate monomers and the polyol monomers are urethane linkages. To prepare such networks, a mixture including polyisocyanate monomers (e.g., diisocyanates, triisocyanates), polyol monomers (diols, triols), and a solvent is provided. The polyisocyanate and polyol monomers may be aliphatic or aromatic. A polyurethane catalyst is added to the mixture causing formation of linkages between the polyisocyanate monomers and the polyol monomers. Phase separation of particles from the reaction medium can be controlled to enable formation of polyurethane networks with desirable nanomorphologies, specific surface area, and mechanical properties.

Abstract: Nanoporous three-dimensional networks of polyurethane particles, e.g., polyurethane aerogels, and methods of preparation are presented herein. Such nanoporous networks may include polyurethane particles made up of linked polyisocyanate and polyol monomers. In some cases, greater than about 95% of the linkages between the polyisocyanate monomers and the polyol monomers are urethane linkages. To prepare such networks, a mixture including polyisocyanate monomers (e.g., diisocyanates, triisocyanates), polyol monomers (diols, triols), and a solvent is provided. The polyisocyanate and polyol monomers may be aliphatic or aromatic. A polyurethane catalyst is added to the mixture causing formation of linkages between the polyisocyanate monomers and the polyol monomers. Phase separation of particles from the reaction medium can be controlled to enable formation of polyurethane networks with desirable nanomorphologies, specific surface area, and mechanical properties.

Abstract: To obtain a non-particle-aggregation-type organic polymer monolith separation medium, there is provided a monolith separation medium comprising a skeletal phase and pores being continuous in the form of three-dimensional network, which skeletal phase on its surface has a functional group permitting introduction of a new functional group. The skeletal phase has a non-particle-aggregation-type co-continuous structure having an average diameter of submicron to micrometer size, and is constituted of an addition polymer from an epoxy compound of bi- or higher functionality and an amine compound of bi- or higher functionality. Further, the skeletal phase is enriched in organic matter and does not contain any carbon atoms derived from aromatic series.

Abstract: An aluminum chelate latent curing agent includes an aluminum chelate curing agent, and a porous resin that holds the aluminum chelate curing agent and is obtained by subjecting a polyfunctional isocyanate compound to interfacial polymerization while simultaneously subjecting a polyfunctional radical polymerizable compound to radical polymerization in the presence of a radical polymerization initiator. In the aluminum chelate latent curing agent, a silanol compound of the formula (A) is further held in the porous resin. (Ar)mSi(OH)n??(A) In the formula, m is 2 or 3, and the sum of m and n is 4. Ar represents an optionally-substituted aryl group.

Abstract: The invention relates to the use of 2,5-diisocyanato-1,4:3,6-dianhydro-2,5-dideoxy-D-manitol (I), 2,5-diisocyanato-1,4:3,6-dianhydro-2,5-dideoxy-D-glucitol (II), and/or 2,5-diisocyanato-1,4:3,6-dianhydro-2,5-dideoxy-L-iditol (III).

Abstract: The invention relates to a process for the production of liquid, storage-stable isocyanate mixtures with a low color index having carbodiimide-(CD) and/or uretone imine (UI) groups, the isocyanate mixtures that can be obtained by this process and their use for the production of blends with other isocyanates or for the production of isocyanate group-containing pre-polymers and also of polyurethane plastics, preferably polyurethane foamed plastics.

Abstract: A method and product for removing nitrogen compound molecules from gasoline or diesel fuel includes exposing the gasoline or diesel fuel to a plurality of molecularly imprinted polymer beads (MIPS) that have receptor sites on the surfaces thereof that include imprints that match the physical shape of at least a portion of a nitrogen compound molecule. A quantity of the nitrogen molecules align with and adhere to some of the receptor sites and, accordingly, they are removed from the gasoline or diesel fuel producing a remediated or sweetened gasoline or diesel fuel. According to one embodiment, the MIPS are contained in an enclosure having a plurality of openings large enough to permit the solution to pass through and small enough so as to prevent the MIPS from passing through. According to another embodiment the MIPS are applied (i.e.

Abstract: In one of its aspects, the present invention relates to foamed isocyanate-based polymer derived from a reaction mixture comprising an isocyanate, an active hydrogen-containing compound, a dendritic macromolecule and a blowing agent; wherein at least a 15% by weight of the dendritic macromolecule may be mixed with a polyether polyol having an OH number less than about 40 mg KOH/g to form a stable liquid at 23° C. The dendritic macromolecule confers advantageous load building characteristics to the foamed isocyanate-based polymer and may be used to partially or fully displace the use of conventional copolymer polyols used. A process for production of a foam isocyanate-based polymer and a process for conferring loading building properties to a foamed isocyanate-based polymer are also described.

Abstract: An embodiment of the present invention includes a foam prepared from a resin comprising: one or more saccharides; one or more isocyanates; one or more resin polyols; and water. The foam may be for example polyurethane foam or polycyanurate foam, either flexible or rigid. Another embodiment includes a method for preparing a foam comprising: forming a resin by mixing one or more saccharides with one or more isocyanates and then mixing the one or more saccharides and the one or more isocyanates with water; and admixing one or more foam polyols to the resin. Another embodiment includes a method for manufacturing a foam derived from an isocyanate, comprising replacing all or a portion of the isocyanate with a resin comprising: one or more saccharides; one or more isocyanates; one or more resin polyols; and water. Another embodiment includes an article of manufacture comprising such foam.

Abstract: A fully imidized, solvent-free polyimide foam having excellent mechanical, acoustic, thermal, and flame resistant properties is produced. A first solution is provided, which includes one or more aromatic dianhydrides or derivatives of aromatic dianhydrides, and may include one or more aromatic diamines, dissolved in one or more polar solvents, along with an effective amount of one or more blowing agents. This first solution may also advantageously include effective amounts respectively of one or mores catalysts, one or more surfactants, and one or more fire retardants. A second solution is also provided which includes one or more isocyanates. The first and second solutions are rapidly and thoroughly mixed to produce an admixture, which is allowed to foam—in an open container, or in a closed mold—under ambient conditions to completion produce a foamed product. This foamed product is then cured by high frequency electromagnetic radiation, thermal energy, or a combination thereof.

Abstract: A novel resin for binding composite lignocellulosic, cellulosic and non-cellulosic products is disclosed. The resin is comprised of one or more isocyanates, one or more saccharides, one or more polyols, and water. Preferaby, the saccharide is a polysaccharide comprised of corn syrup. Preferably, the isocyanate is a polyisocyanate and the polyol is an ethylene glycol. Also disclosed are methods for preparing and applying the resin as well as the products prepared from the resin.

Abstract: Polyisocyanurate foams are produced by mixing at least one organic isocyanate and at least one polyol in the presence of at least one aliphatic or cycloaliphatic C4-C7 hydrocarbon having a boiling point of 70° C. or less at 760 millimeters pressure, at least one trimerization catalyst, at least one alkylene glycol ester of tetrabromophthalic anhydride, and at least one phosphorus ester selected from (i) tri(chloroalkyl)phosphate in which each alkyl group has 2 or 3 carbon atoms, (ii) dialkyl alkanephosphonates in which each alkyl group has 1 or 2 carbon atoms and in which the alkane group has 1 or 2 carbon atoms, and (iii) triethylphosphate, and wherein the organic isocyanate and polyol components are proportioned to form a polyisocyanurate having an isocyanate index in the range of about 240 to about 280.

Abstract: A process for producing a low-density rigid polyurethane foam by reacting a polyisocyanate and a polyol composition which comprises a hydroxy-terminal polyfunctional polyol component using an expansion system comprising water, liquid CO2 and optionally a hydrofluorocarbon auxiliary expander. The water is present in an amount of less than 1 par by weight per 100 parts of polyol component. The polyurethane foam may be used in the manufacture of heat insulating panels.

Abstract: Process for preparing a flexible foam by reacting a polyisocyanate having a high 4,4′-MDI content and a polyol having a high EO content in the presence of a foaming agent.

Abstract: A process for the production of micro-cellular or non-cellular, light-stable elastomeric, flexible or semi-flexible polyurethane moldings which are especially suited for window encapsulation applications from a reaction mixture by the reaction injection molding process, wherein: A) an isocyanate component containing an isophorone diisocyanate (IPDI) trimer/monomer mixture having an NCO content of from 24.

Abstract: The present invention discloses a method for the formation of and a flexible slabstock polyurethane foam having substantially improved indentation force deflection and resilience characteristics while maintaining the other physical properties. The method comprises the steps of: forming a polyol blend having a nominal functionality of at least 2.3 by combining at least one polyether polyol having a plurality of terminal ethylene oxide caps of from 5 to 25% by weight based on the total weight of the polyether polyol, a molecular weight of greater than or equal to 4000 Daltons, and an unsaturation of greater than 0.04 meq/g KOH; at least one graft polyether polyol having an equivalent weight of greater than 1000 Daltons, a solids content of at least 28%, and a plurality of terminal ethylene oxide caps of from 5 to 25% by weight based on the total weight of the graft polyether polyol; and at least one very low unsaturated polyether polyol having an unsaturation of less than or equal to 0.

Abstract: Biodegradable polyesters P1 obtainable by reaction of a mixture consisting essentially of (a1) a mixture consisting essentially of from 35 to 95 mol % of adipic acid or ester-forming derivatives thereof or mixtures thereof, from 5 to 65 mol % of terephthalic acid or ester-forming derivatives thereof or mixtures thereof, and from 0 to 5 mol % of a sulfonate compound, the sum of the individual mole percentages being 100 mol %, and (a2) a dihydroxy compound selected from the group consisting of C2-C6-alkanediols and C5-C10-cycloalkanediols, the molar ratio of (a1) to (a2) being chosen within the range from 0.4:1 to 1.5:1, with the proviso that the polyesters P1 have a molecular weight (Mn) within the range from 5000 to 50,000 g/mol, a viscosity number within the range from 30 to 350 g/ml (measured in 50:50 w/w o-dichlorobenzene/phenol at a concentration of 0.5% by weight of polyester P1 at 25° C.) and a melting point within the range from 50 to 170° C.

Abstract: The present invention relates to a process for preparing a flexible polyurethane foam from the reaction of a polyisocyanate composition prepared from the reaction of an excess of organic polyisocyanate and a polyether polyol having a high ethylene oxide content and an isocyanate reactive composition comprising a chain extending agent and a combination of a polyether polyol having a high ethylene oxide content and a random copolymer having a high ethylene oxide content, and the product prepared therefrom.

Abstract: A method is described for the preparation of rigid foams, having urethane and/or isocyanurate groups and being extensively open celled, by reacting polyisocyanates with compounds having at least two groups capable of reacting with isocyanates and the equivalent weight per reactive group of which is about 9 to 800, in the presence of catalysts, surface active substances, as well as, optionally, physical blowing agents, flame retardants and other known auxiliary materials and finishing agents, wherein the reaction is carried out in the presence of liquid, higher molecular weight, unsaturated hydrocarbons, which are free of groups capable of reacting with isocyanates, in amounts of 0.01 to 3.0% by weight, based on the reaction formulation. Particularly preferred hydrocarbons are polybutadiene and polyoctenylene with an average molecular weight of 800 to 10,000 g/mole. The rigid foams, because of their open cell nature, exhibit high dimensional stability.

Abstract: Polyisocyanate based organic aerogels having pore sizes less than 100 nm, densities in the range 10 to 800 kg/m.sup.3 and surface areas in the range 10 to 1500 m.sup.2 /g are provided.

Abstract: The invention provides a liquid polyisocyanate prepolymer composition which is a result of combining about 50 to 90 percent by weight of an isocyanate blend (a.) having 55 to 75 weight percent 4,4'-MDI, 17 to 27 weight percent 2,4'-MDI, 1 to 10 weight percent 3-ring MDI oligomer, and 1 to 15 weight percent n-ring MDI oligomer (n greater than 3); about 5 to 30 weight percent of a polyhydroxy containing polyol (b.) having a molecular weight of from 700 to about 6,000, and about 5 to 15 weight percent of a toluene diisocyanate (c.). The resulting isocyanate prepolymer composition has a free NCO content of from about 20 to 40 weight percent and particularly desirable flow characteristics. The invention further provides a method of making an isocyanate prepolymer composition, a process of making a polyurethane foam utilizing the isocyanate prepolymer composition of the invention, and polyurethane foams produced by the disclosed process.

Abstract: Disclosed herein is a process for the preparation of a reaction injection molded elastomer comprising injecting a reaction mixture into a closed mold via a RIM machine, with the ratio of components being such that the isocyanate index is from about 70 to about 130, said reaction mixture comprising (a) an organic di- and/or polyisocyanate, (b) an amine terminated chain extender, and (c) a compound which is derived from the reaction of a polyfunctional acetoacetic acid ester and an aliphatic amine having amino groups of different reactivity.

Abstract: The present invention relates to polyurethanes with softening temperatures above 80.degree. C. which are NCO-free, which are reactive via masked isocyanates, which are essentially linear and extensively pre-lengthened, and their preparation. The polyurethanes can be used as powders which can be processed like thermoplastics and post-cured.

Abstract: A new process for the standardization and stabilization with simultaneous increase of reactivity of organic polyisocyanates and the polyisocyanates produced by this process. A polyisocyanate is mixed with compounds having at least one epoxide group which are represented by a specified formula. This mixture is then stabilized with a silylating agent and/or alkylating agent represented by specified formula. The polyisocyanate/epoxide mixture may optionally be heated before the stabilizing agents are added. These polyisocyanates are useful in the production of polyisocyanate addition products.

Abstract: Rigid urea-modified polyisocyanurate foams with improved dimensional stability and flame retardancy have densities of 0.5-20 p.c.f., a limiting oxygen index greater than 22 and dimensional changes at 100% R.H. and 70.degree. C. of less than 2% in any linear dimension and a method of making same. The method comprises reacting an organic polyisocyanate, a blowing agent and an N,N'-dialkyl aromatic diamine in the presence of a trimerization catalyst and, if water is used as the blowing agent, a blowing catalyst, wherein the N,N'-dialkyl aromatic diamine and an amine produced by water, if used, constitute the sole sources of active hydrogen.

Abstract: Polyisocyanate-based foams having a uniformly fine cell size are prepared by reacting a polyisocyanate with an isocyanate-reactive compound in the presence of a blowing agent mixture comprising a hydrocarbon component which has four or more carbon atoms and a polyfluorocarbon component which has a boiling point of from about 283 K. to about 393 K. at 760 mm Hg and wherein the boiling point:molecular weight ratio of said polyfluorocarbon component is less than or equal to 1.7. The hydrocarbon component is present in from about 5 to about 95 mole percent and the polyfluorocarbon in from about 95 to about 5 mole percent based on total amounts of hydrocarbon and polyfluorocarbon.

Abstract: The invention relates to water blown integral skin polyurethane foams made with a particular isocyanate quasi-prepolymer and resin side ingredients to yield a foam having good overall mechanical properties. The isocyanate quasi-prepolymer component of the present invention comprises from 0.5 weight percent to 30.0 weight percent or less uretonimine-carbodiimide-modified diphenylmethane diisocyanate, from 50 weight percent to 80 weight percent 4,4'-diphenylmethane diisocyanate and reacted with from 15 weight percent to 40 weight percent of a polyether polyol containing predominately secondary hydroxyl groups and having an average molecular weight from about 2,000 to 10,000, an average functionality from 1.5 to about 3.2, and a hydroxyl number from about 20 to 60, and optionally with a low molecular weight diol in an amount of from 1.0 weight percent to 10 weight percent, the weight percentages based on the weight of the quasi-prepolymer reactants.

Abstract: The present invention relates to liquid storable organic isocyanates containing carbodiimide and/or uretone imine groups prepared by(a) partially carbodiimidizing isocyanate groups of an organic isocyanate with catalysts of the phospholine type, and(b) terminating the carbodiimidization reaction by the addition of a silylated acid corresponding to the formulaX--[Si(CH.sub.3).sub.3 ].sub.nin whichX represents the neutral acid residue obtained by removal of the acidic hydrogen atoms from an n-basic acid having a pK.sub.a value of at most 3, other than a hydrohalic acid, andn is an integer of 1 to 3.The invention further relates to the use of the liquid polyisocyanate mixtures according to the invention for the preparation of polyurethane plastics, preferably polyurethane foams, having improved burning behavior.

Abstract: A viscosity-stable polyisocyanate prepared by heating a polyisocyanate containing uretone imine groups and a catalyst under reaction conditions sufficient to produce compounds containing 2-imino-4,6-dioxohexahydro-s-triazine groups is disclosed. The polyisocyanate product so prepared may be used alone or blended with other polyisocyanates or diisocyanates to produce polyurethane, polyisocyanurate, polyamide and related polymers. These polymers, when used to prepare a foam, may exhibit improved dimensional stability and flammability. Also disclosed is a family of isocyanate compounds containing at least one 2-imino-4,6-dioxohexahydro-s-triazine group and having an isocyanate functionality of at least 4.

Abstract: Disclosed herein are liquid polyisocyanate mixtures containing isocyanurate groups and having an NCO content of 15 to 30% by weight obtainable by partial trimerization of the isocyanate groups of polyisocyanate mixtures of the diphenyl methane series containing 80 to 100% by weight diisocyanatodiphenyl methane isomers and 0 to 20% by weight higher than difunctional polyisocyanates of the diphenyl methane series, 40 to 80% by weight of the diisocyanatodiphenyl methane isomers consisting of 4,4'-diisocyanatodiphenyl methane, 20 to 60% by weight of 2,4'-diisocyanatodiphenyl methane and 0 to 8% by weight of 2,2'-diisocyanatodiphenyl methane and the percentages shown adding up to 100.

Abstract: A modified organic polyisocyanate is prepared in such a manner that a trimerization catalyst, an organic phosphite estr, and a surfactant, and optionally a ferrocene compound are added to an organic isocyanate and/or a partially urethanized organic polyisocyanate to cause isocyanuration in an extent that not more than 20% by weight of entire isocyanate groups are isocyanurated; and a stopper is added, if necessary.

Abstract: Polyurethane/urea foams are derived from prepolymers having branched chain linked isocyanate end groups and components containing isocyanate reactive imino/enamino-functional compounds.

Abstract: A heat insulator made of shape memory polymer foam which has good moldability and changes greatly in elastic modulus above and below its glass transition point, and a heat insulator as mentioned above in which the polymer foam is polyurethane produced by prepolymer process from a composition containing a blowing agent, said composition being composed of a difunctional diisocyanate, a difunctional polyol, and a difunctional chain extender containing active hydrogen in a molar ratio of 2.00-1.10:1.00:1.00-0.10, said polyurethane containing approximately equal amounts of NCO groups and OH groups at the terminals of the molecular chains and having a glass transition point of -50.degree. to 60.degree. C. and crystallinity of 3 to 50 wt %.

Abstract: A polyurethane elastomer produced by reaction of a polyisocyanate with an amine-type polyol and another type polyol, the polyisocyanate being an isocyanurate-modified hexamethyelene diisocyanate; and the equivalent ratio of active hydrogen to isocyanate group to be reacted being in a range of from 0.8 to 1.6; and the ratio of the amine-type polyol to the another type polyol being in a range of from 10/90 to 100/0 by weight.

Abstract: An expandable, powder coating composition is disclosed which comprises (a) a thermoplastic resin containing a hydroxyl group-containing polymer, (b) a cross-linking agent containing a polyisocyanate compound which is capable of reacting with the hydroxyl groups of the polymer to crosslink the polymer at a temperature higher than the melting point of the thermoplastic resin and which is solid at room temperature, and (c) a blowing agent capable of decomposing and generating a gas when heated to a temperature higher than the melting point of the thermoplastic resin. Powder coating with the coating composition can give a heat-insulating, foamed sheath or lining over the surface of a metal tube or box to be used in air conditioners.

Abstract: The present invention comprises novel single-functional and mixtures of multi-functional oligomeric performance additive compounds having one or more components of Structure A ##STR1## (The definitions of R, Z1, Z2, Z3, A1, A2, A3 and y are given in the Summary Section), their uses and polymeric compounds and compositions containing them which have enhanced oxidative stabilities, enhanced ultraviolet (UV) and light stabilities and/or enhanced flame retardance. An example is the bis sulfonic acid bispotassium salt reaction product from an oligomeric caprolactone diol (TONE.RTM. 260), 2-sulfobenzoic acid anhydride and potassium carbonate, and use of this product, at levels up to about 3.0%, in a general purpose bisphenol A polycarbonate resin, to enhance the fire resistance or flame retardance of the polycarbonate resin.

Abstract: A new polyurethane as well as a process for preparing same is disclosed. The new polyurethane contains therein a hard segment derived from at least one polyhydroxy substance selected from the group consisting of cellulosic substances, hemi-cellulosic substances and lignic substances, and is excellent in mechanical and thermal characteristics as compared with the existing polyurethanes. The new polyurethane can be prepared according to a method known per se, using the polyhydroxy substance alone or in mixture with a polyol compound as reactants to be polycondensed with a polyisocyanate.

Abstract: Low temperature stable polymethylene polyphenylene polyisocyanates are composed of crude polymethylene polyphenylene polyisocyanate containing from about 50 to about 80 percent by weight 2-ring diphenylmethane diisocyanate wherein from about 65 to about 93 weight percent of the 2-ring diisocyanate is 4,4'- and from about 7 to about 35 weight percent is 2,4'- and furthermore the composition contains from about 1 to about 5 weight percent carbodiimide-uretonimine structure. The polyisocyanates are useful in preparing polyurethane foams.

Abstract: A polyisocyanate composition, suitable for use in the production of elastomers by the RIM process, or foams, said composition being the product of reacting an imino-functional or enamine-containing compound having a molecular weight of at least 1000 with a stoichiometric excess of an organic polyisocyanate.

Abstract: Polyurethanes containing uretdione rings are produced by reacting a polyisocyanate containing a uretdione ring with a relatively high molecular weight dihydroxyl compound in the presence of a bismuth salt of an organic carboxylic acid and a low molecular weight aromatic diamine. The low molecular weight aromatic diamine is used in a quantity which is 5 to 10 times the quantity of bismuth salt used. These solid polyurethanes are formed in relatively short reaction times and possess outstanding mechanical properties.

Abstract: Lactones and lactams are utilized in the preparation of urethane modified prepolymers based on diphenylmethane diisocyanate, uretonimine-modified diphenylmethane diisocyanate. The prepolymers are then employed to prepare microcellular foams suitable for shoe soles and cast polyurethane products.

Abstract: A non-liquid, energy-absorbing polyurethane is derived from the process which comprises reacting a mixture of linear and branched polyols, a polyisocyanate and, optionally, a blowing agent, under polyurethane-forming conditions at an isocyanate index of from about 65 to about 85.

Abstract: A system for use in making molded polyurethane objects by an open or closed casting process, said system comprising(A) an aromatic polyisocyanate; and(B) an active hydrogen-containing composition comprising(i) a polyhydric alcohol having an average molecular weight in the range of about 1000 to about 8000 and an average functionality of about 2 to about 4;(ii) a polyhydric alcohol having 2 to 12 carbon atoms and an average functionality of about 2 to about 3; and(iii) a secondary monoamine of the formulaR--NH--R'wherein R and R' are independently saturated aliphatic groups having 1 to 20 carbon atoms, provided that said secondary monoamine contains at least 4 carbon atoms.

Abstract: The present invention relates to a process for the production of urethane modified polyisocyanate preparations having an isocyanate content of 5 to 32% by weight by the reaction of(a) polyisocyanates of the diphenylmethane series or polyisocyanate mixtures of the diphenylmethane series with(b) organic polyhydroxyl compoundsusing an NCO/OH equivalent ratio of from 2.5:1 to 50:1, characterized in that the organic polyhydroxyl compound (b) used are:(b1) urazoles or isocyanurates having OH numbers in the range of from 168 to 721 containing 2 or 3 alcoholic hydroxyl groups and carrying hydroxyalkyl substituents, optionally with ether bridges, on the nitrogen, or mixtures thereof, or(b2) mixtures of the polyhydroxyl compound mentioned under b1) with up to 50 hydroxy equivalents percent of other organic polyhydroxyl compounds.

Abstract: Reaction injection molded polyurethanes prepared from a composition comprising (A) a relatively high molecular weight polyol, (B) a chain extender and (C) an aliphatic polyisocyanate or polyisothiocyanate are improved by replacing a portion of the relatively high molecular weight polyol with an aminated or partially aminated polyoxyalkylene material.

Abstract: A light stable, fast reacting, aliphatic polyurethane sprayable coating composition and injectable open molding material is prepared by reacting an A side composition comprising a trimerized or biuret polymethylene polyisocyanate prepolymer with a B side composition comprising an admixture of an alkoxy polyalkylene glycol, such as methoxypolyethylene glycol and an aromatic polyamine such as a diethyl toluene diamine to provide a polyurethane reaction product which rapidly gels, may be quickly removed from the mold, has good green strength and high temperature resistance and is characterized by good ultraviolet or light stability properties. Optionally, the B side composition may contain a catalytic amount of a metal carboxylate like lead napthenate. The A and B side compositions may be sprayed onto a mat in an open mold and also may be sprayed in conjunction with chopped glass fibers, to form a glass-fiber spray coating.