Abstract: In an active hydrogen-containing B-side composition for reaction with a polyisocyanate-containing A-side composition to make a polyurethane or polyurethaneurea elastomer by reaction injection molding, the improvement which comprises a mold release composition consisting essentially of (1) the reaction product of a mixture of a carboxylic acid, a tertiary amine, and a reactive epoxide and (2) a carboxy functional siloxane.

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: A concrete fluid structure deteriorated to the condition of removal of substance of the concrete by sulfuric acids and like corrosive material in contact therewith is restored by a substratum of epoxy foam, polyurethane foam, or a combination thereof having a relatively thin layer of polyvinyl chloride or polyethylene bonded to the outward facing surface of the foam and bonding the layer to the structure. A method for forming the substratum in the location of the deteriorated structure is described.

Abstract: A process for the production of chlorofluorocarbon-free, urethane- or urethane- and urea-containing, soft-elastic, semirigid or rigid moldings having a cellular core and a compacted peripheral zone and an essentially pore-free, smooth surface involves reactinga) an organic and/or modified organic polyisocyanate withb) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms, and, if desired,c) a low-molecular-weight chain extender and/or cross-linking agent,in the presence ofd) a blowing agent,e) a catalyst,f) at least one microporous activated charcoal and/or microporous carbon molecular sieve which preferably has a mean pore diameter with a frequency of occurrence of more than 40% in the range from 0.3 to 3 nm, a pore volume of from 0.20 to 1.4 ml/g and a BET surface area of from 500 to 2500 m.sup.2 /g, and, if desired, further additives andg) assistants,in a closed mold with compaction.

Abstract: To arrive at an economical method of producing water-expanded polymer resin moldings, it is proposed that a monomer component and a cross-linker on an acrylate basis and/or a PMMA prepolymer be used as resin-forming components of a curable mixture, with the weight ratio of the water component to the resin-forming component being at least 1:1.

Abstract: A foamable, curable composition or mass based on silicone is disclosed which comprises components which expand at higher temperatures and which do not burn or are difficult to burn. The mass is suitable for fire-proofing, since the burning temperature leads to an expansion of these components. The mass can be used to seal or cover objects which are in danger of burning or can be formed into a finished, molded object or body and used as such.

Abstract: It has been found that the use of specific expanded organic microspheres greatly improve the RIM process by (i) significantly enhancing the blowing action of air and/or nitrogen, (ii) providing for uniform density of the molded part, (iii) allowing for the reduction of internal mold pressures, (iv) substantially eliminating surface defects, (v) allowing for a significant reduction in density in the molded product, (vi) allowing for a substantial increase in the amount of air and/or nitrogen that can be dissolved in the isocyanate-reactive component, and (vii) significantly reducing shrinkage in the molded part.

Abstract: The present invention relates to apparatus for transferring constituents into and out of a fluid such as blood. The apparatus includes a biphasic foam body which functions as a blood oxygenator, blood dialyzer, or other blood mass transfer device.

Abstract: Disclosed is a a bimodal, insulative, styrenic polymer foam structure comprising a foam of a styrene polymer material of greater than 50 percent by weight of styrenic monomeric units, the foam having relatively larger primary cells with a cell size range of 0.05 to 1.2 millimeters and relatively smaller secondary cells ranging in cell size from about 5 percent to about 50 percent of the average cell size of the primary cells. The primary and secondary cells constitute at least about 90 percent of the total cell volume within the foam structure. The bimodal structure has an amount of carbon black sufficient to reduce the thermal conductivity of the structure below that of a corresponding bimodal structure without carbon black. Further disclosed is a process for making the foam structure.

Abstract: Process for the preparation of filled heat-curable compounds of the polyurethane type by reaction of condensation of the constituents of the desired compound in the presence of a pulverulent filler, which is characterized in that the said filler is predispersed in the presence of a stabilizing agent in a liquid organic phase compatible with the desired heat-curable compound in the course of its formation reaction, the said filler being then in the form of a homogeneous and stable suspension, and the suspension thus prepared is then introduced into the reaction mixture before, during or after the introduction of at least one of the constituents of the desired heat-curable compound.The process according to the invention makes it possible to produce compounds of the polyurethane type whose mechanical and physical characteristics are at least equivalent or even improved in relation to those of the unfilled identical compounds by virtue of the excellent distribution of the inorganic filler.

Abstract: Microcellular polyurethane elastomers having nonpeelable skin surfaces having densities ranging from 0.1-1.1 gm/cm.sup.3 can be made from conventionally employed reactants using carbon dioxide gas as the sole source of blowing agent resulting from the H.sub.2 O/-NCO reaction when carried out in an admixture with nonhydratable particulate inorganic salts.

Abstract: Disclosed is a bimodal, insulative, styrenic polymer foam structure comprising a foam of a styrene polymer material of greater than 50 percent by weight of styrenic monomeric units, the foam having relatively larger primary cells with a cell size range of 0.05 to 1.2 millimeters and relatively smaller secondary cells ranging in cell size from about 5 percent to about 50 percent of the average cell size of the primary cells. The primary and secondary cells constitute at least about 90 percent of the total cell volume within the foam structure. The bimodal structure has an amount of carbon black sufficient to reduce the thermal conductivity of the structure below that of a corresponding bimodal structure without carbon black. Further disclosed is a process for making the foam structure.

Abstract: The flame retardancy of flexible polyurethane foams is increased by incorporation into the foam forming reactants of a low molecular weight, high primary hydroxyl trifunctional polyether polyol having a hydroxyl number between 300 and 500 and a primary hydroxyl content greater than 50 percent.

Abstract: A closed cell, rigid, polymer foam comprising the reaction product of a polyisocyanate and an isocyanatereactive compound in the presence of (a) a foaming agent, (b) at least about 2 percent by weight of carbon black, based on the weight of the polymer in the foam, and (c) a capped polyoxyalkylene compound which helps bring about a uniform dispersion of the carbon black throughout the foam so that the aged k-factor of the foam is below the aged k-factor of the corresponding unfilled foam.

Abstract: A process for preparing a flame-resistant, elastic soft polyurethane foam includes admixing a portion of expanded graphite having a particle size of from 0.2 to 1 mm as a flame retardant and a portion of melamine, with a foam reaction mixture of polyol and polyisocyanate.

Abstract: The present invention is related to polyurethane foam materials, pores thereof being free of halogenated hydrocarbon compounds, in particular free of CFCs, and a process for producing the same wherein no halogenated hydrocarbon, in particular no CFC is used as foaming agent. The pores of the polyurethane foam material contain minor amounts of the vaporized foaming agent used in the process of the invention, i.e. of the organic liquid product selected from the group consisting of a lower alkane having 3 to 6 carbon atoms or a mixture of such lower alkanes, said liquid foaming agent having a boiling point between -10.degree. and =70.degree. C. at normal pressure.

Abstract: The present invention relates to reactive systems comprising(a) a storable mixture of (i) a polyisocyanate component comprising at least one organic polyisocyanate, and (ii) an epoxide component stabilized by heating in the presence of an alkylating agent, wherein said heating is optionally carried out in the further presence of part of the polyisocyanate component (i),(b) an isocyanate-reactive component containing at least two isocyanate-reactive groups in a quantity such that 0.1 to 0.9 isocyanate-reactive groups are present for every isocyanate group in component (a), wherein at least 10% by weight of component (b) comprises compounds having a molecular weight greater than about 2000,(c) optionally, tertiary amines in a quantity such that the total storable mixture contains at least 0.005 mole of tertiary amine nitrogen atoms for each 100 g of the total amount of the storable mixture, and, optionally,(d) other auxiliaries and additives.

Abstract: A process for the production of polycarbonate foam moldings is disclosed. Accordingly, a composition is prepared comprising mixing a thermoplastic polycarbonate resin and 0.01 to 1 mole-% of a transesterification catalyst anda) 0.1 to 5 mole-% of an aromatic polycarboxylic acid, optionally along with about 0.1 to 5 mole-% of at least one member selected from the group consisting of aliphatic hydroxy carboxylic acids and aliphatic polyalcohols, orb) 0.1 to 5 mole-% of H.sub.2 O, optionally along with at about 0.1 to 5 mole-% of at least one member selected from the group consisting of aliphatic hydroxycarboxylic acids and an aliphatic alcohols, orc) the additives of said a) and b), ord) 0.1 to 5 mole-% of at least one member selected from the group consisting of diarylcarbonates and oligocarbonates,said percent based in every case on moles aromatic carbonate structural units ##STR1## in which --O--R--O is a diphenolate residue.

Abstract: The invention relates to a process for preparing highly elastic polyurethane flexible foams by the reaction of(a) polyisocyanates with(b) polyethers having a molecule weight of from 400 to 10,000 and containing at least two isocyanate-reactive hydrogen atoms,in the presence of(c) water and(d) mixtures of crosslinking agents having a molecular weight of from 32 to 399 and containing at least two isocyanate-reactive hydrogen atoms, wherein said mixtures contain(I) alkanolamines and(II) amine-free polyols,with the proviso that components (c) and (d) must be used together as an aqueous solution.

Abstract: Disclosed is a makeup material for human use containing a shape memory polymer shaped into fine spheres. The shape memory polymer used is a polyurethane that is obtained by polymerizing with the prepolymer method a composition of a bifunctional diisocyanate, a bifunctional polyol, and a bifunctional chain extender with active hydrogen groups in the mole ratio of diisocyanate:polyol:chain extender=2.00-1.10:1.00:1.00-0.10. The polyurethane is preferred to have approximately equal amounts of NCO groups and OH groups at its ends, and a glass transition point above the human body temperature, and a crystallinity value between 3 to 50 wt %.

Abstract: A foam absorber having electromagnetic energy attenuation characteristics comprising an open cell reticulated polyurethane foam impregnated with a conductive ink applied to a surface of the foam substrate. The conductive ink is applied as by spraying to a surface of the foam, coating such surface and gradiently loading the foam with the ink by penetration of the ink in gradually decreasing amount into the foam to a final depth therein. The conductive ink is comprised of an epoxy resin carrier and a combination of carbon and a metal such as silver, copper or nickel, preferably silver. The ink is applied as a curable mixture containing a solvent, to the foam substrate, the solvent is evaporated following coating and penetration of the ink into the foam, and the epoxy carrier of the ink in the foam substrate is cured.

Abstract: A closed cell, rigid, polymer foam comprising the reaction product of a polyisocyanate and an isocyanate-reactive compound in the presence of (a) a foaming agent, (b) at least about 2 percent by weight of carbon black, based on the weight of the polymer in the foam, and (c) a capped polyoxyalkylene compound which helps bring about a uniform dispersion of the carbon black throughout the foam so that the aged k-factor of the foam is below the aged k-factor of the corresponding unfilled foam.

Abstract: The invention pertains to drip retardant flexible polyurethane foams prepared by the reaction of an isocyanate with a polyol resin containing a drip retardant made of either a trialkyl end-capped amine functional silicone polymer or a trialkyl end-capped carbinol functional silicone polymer to effectively prevent the foam from dripping while burning and encourage char formation.

Abstract: The invention concerns a method of using constrained layer sound damping. A composition and a laminated structure are provided for the reduction of noise coming from housings such as oil pans for automobiles. The composition comprises a rubbery polyurethane, an olefin polymer, and a filler. The laminated structure comprises the housing, the composition, and a sheet metal liner. The composition contains a blowing agent which is activated to provide a single unitary structure which dampens noise. The polyurethane and olefin polymer are thoroughly intermixed with each other, but maintain their separate identities in the blend.

Abstract: A closed cell, rigid, polymer foam comprising the reaction product of a polyisocyanate and an isocyanate-reactive compound in the presence of (a) a foaming agent, (b) at least about 2 percent by weight of carbon black, based on the weight of the polymer in the foam, and (c) a capped polyoxyalkylene compound which helps bring about a uniform dispersion of the carbon black throughout the foam so that the aged k-factor of the foam is below the aged k-factor of the corresponding unfilled foam.

Abstract: The present invention relates to foam compositions which are expanded with hydrohalocarbon blowing agents in the presence of additives which decrease the formation of haloalkenes during the polymerization. Thus, the present invention provides compositions comprising polyisocyanate, polyol, hydrohalocarbon blowing agent, catalyst, surfactant, and at least one additive wherein the additive is capable of decreasing the amount of decomposition of said dehydrohalocarbon blowing agent to haloalkenes during polymerization of the polyisocyanate and the polyol.Depending upon the polyol and polyisocyanate used and the quantity of polyisocyanate used, the compositions may be used in pour-in-place molded foams; rigid urethane spray foams; rigid high and low density foams for slabstock, froth foams, and molded foams; rigid laminated boardstock; or specialty foams.

Abstract: A process for the manufacture of a rigid, closed-cell polyisocyanurate foam from a foam forming mixture comprising an organic polyisocyanate, a polyol, a blowing agent, and a catalyst, utilizing a polyester polyol as the sole polyol, and chlorodifluoromethane or a mixture of chlorodifluoromethane and at least one co-blowing agent as the blowing agent.

Abstract: A process for the production of an open cell polyurethane foam comprises the mixing of the following components at ambient temperatures in a mixing zone: a diisocyanate having a functionality of at least about 2.0, at least one hydrogen donor, at least one surfactant which is effective in forming an open cell polyurethane foam, at least one catalyst, and a blowing agent comprising a gas having a boiling point below approximately -100.degree. F. at atmospheric pressure which preferably comprises carbon dioxide. In addition, the mixture may also optionally contain water. The mixture is subjected to a pressure in said mixing zone which is sufficient to maintain the blowing agent in the liquid state at ambient temperatures. After mixing, the mixture is ejected from the mixing zone to atmospheric pressure, thereby completely and instantaneously vaporizing the blowing agent to provide expansion of the mixture. The resultant foam is then cured at ambient temperatures.

Abstract: A method of producing a polyurethane foam comprising the steps of dissolving rapidly and substantially completely a non-condensible non-reactive gas in a liquid isocyanate component or a liquid polyol component or both while the isocyanate and polyol components are maintained separate from one another, while controlling the flow of the non-reactive gas to maintain a predetermined dissolved gas to liquid ratio, and while maintaining the component in which the nucleating agent is being dissolved under pressure sufficient to maintain the gas in solution and to hold substantially constant the dissolved gas to liquid ratio and mixing the previously separated isocyanate and polyol components together while reducing the pressure to nucleate the dissolved gas in the isocyanate and polyol components and while impinging liquid streams of the composition together thereby enhancing mixing and permitting the mixture to foam so as to form a fine celled polyurethane foam.

Abstract: The present invention relates to a polyether polyol which is prepared by(i) reacting 3.0 to 4.0 molecular equivalents of ethylene oxide with one molecular equivalent of 2,3- or 3,4-tolylenediamine, or a mixture thereof in the absense of catalyst, and thereafter,(ii) reacting 2.8 to 4.8 molecular equivalents of propylene oxide with one molecular equivalent of the reaction product in the presence of an alkali metal hydroxide in an amount of not more than 0.8% by weight based on the 2,3- or 3,4-tolylenediamine, or the mixture thereof.The present invention also relates to a rigid polyurethane foam which is prepared by reacting a polyol mixture containing not less than 50 wt % of the above-mentioned polyether polyol with an isocyanate. The rigid polyurethane foam is obtained with reduced fron requirements.

Abstract: Substantially closed-cell thermoplastic foams having a fragrance incorporated into the foam during extrusion are found to provide fragrant and long lasting release characteristics provided the foam is at least 70 percent closed cells. Generally the amount of fragrance is about 0.001 to about 5 weight percent of the total thermoplastic foam weight.

Abstract: Rigid cellular polymers are made by reacting an organic polyisocyanate with a polyol component comprising a polyester polyol having a free glycol content of less than about 7 percent by weight of the polyester polyol in the presence of a blowing agent. The use of the polyester polyol enhances the thermal insulating properties of the foams.

Abstract: Hydrocarbon oils having a high aromaticity (at least 85%, preferably 95-100%) and a boiling point of about 342.degree. to about 510.degree. C. (about 650.degree. to about 950.degree. F.) are used as partial or total replacements for the foam stabilizers used in the preparation of both rigid, closed cell polyurethane foams and flexible, open cell polyurethane foams. These oils are useful as a replacement for both silicon surfactants and organic (i.e., non-silicon) surfactants. For certain blowing agents (e.g., trichlorofluoromethane and methylene chloride), hydrocarbon oils having a boiling point range of about 399.degree. to 454.degree. C. (about 750.degree. to about 850.degree. F.) are preferred. Highly aromatic oils having a boiling point of about 281.degree. to about 510.degree. C. are useful for reducing the vapor pressure of toluene diisocyanate and for preventing the low temperature crystallization of toluene diisocyanate or diphenylmethane diisocyanate.

Abstract: The present invention relates to a method of producing flexible polyurethane foam having reduced discoloration which utilizes low molecular weight alkanes or mixtures thereof as auxiliary blowing agents. More particularly, the present invention relates to the use of auxiliary blowing agents which are linear or branched alkanes having boiling points above -50.degree. C. and below 100.degree. C.

Abstract: A method for producing a molded product of integral-skin polyurethane foam, which comprises reacting and curing (1) a high molecular weight polyol comprising, as the main component, a polyoxyalkylene polyol having, as the main constituent, oxyalkylene groups of at least 3 carbon atoms and oxyethylene groups at its molecular terminals with the overall oxyethylene group content being not higher than 15% by weight and having a hydroxyl value of not higher than 80, (2) a crosslinking agent containing a compound having an aromatic nucleus and at least two active hydrogen-containing groups selected from the group consisting of hydroxyl groups, primary amino groups and secondary amino groups, and (3) a polyisocyanate, in a mold in the presence of a catalyst and a hydrogen atom-containing halogenated hydrocarbon foaming agent.

Abstract: Flexible polyurethane foams having bulk densities within the range of from 15 to 60 kg/cm.sup.3 and a load bearing capacity, under a compression rate of 40%, higher than 50 N, obtained by the reaction of a modified polyisocyanate with a compound containing activated hydrogen atoms in chain-end position, and wherein agents different from chloro-fluoroalkanes are used as the foaming agent.

Abstract: The present invention relates to a process for the preparation of polyurethane rigid foams having a low thermal conductivity, comprising reacting:a) organic and/or modified organic polyisocyanates with,b) at least one higher molecular weight compound having at least two reactive hydrogen atoms, and optionallyc) lower molecular weight chain extending agents and/or crosslinking agents in the presence of,d) cyclopentane (d1) or mixtures (d2) comprising, d2i) cyclopentane, and/or cyclohexane, d2ii) at least one compound homogeneously miscible with cyclopentane and/or cyclohexane, said compound preferably has a boiling point below 35.degree. C. and is selected from the group consisting of alkanes, cycloalkanes having a maximum of 4 carbon atoms, dialkylethers, cycloalkylene ethers and fluoroalkanes, optionally combined with water as said blowing agent (d),e) catalysts, and optionallyf) auxiliaries and/or additives.

Abstract: An electrically conductive flexible polyurethane foam having fine and homogeneous cells, being low in swelling by water and superior in dimensional stability can be prepared by mixing an isocyanate terminated urethane prepolymer holding isocyanate monomers therein prepared by reacting polyether polyol(s) holding poly(oxypropylene) chains and not more than 30 weight % of poly(oxyethylene) chains therein with a stoichiometrically excessive amount of an isocyanate component with an aqueous dispersion of electrically conductive carbon particles containing water in excess of the stoichiometric amount necessary to react with the isocyanate monomers in the urethane prepolymer and foaming the mixture in a closed mold having a capacity smaller than the volume of a foam which can be obtained by conducting the foaming of the said mixture of the urethane prepolymer and the aqueous dispersion of electrically conductive carbon particles freely under atmospheric pressure.

Abstract: Low and high density structural RIM compositions are disclosed which have low viscosities. These compositions contain a resin "B-side" component which comprises a hydroxyl-functional tertiary amine polyol.

Abstract: Rigid cellular polymers are made by reacting an isocyanate-terminated quasi-prepolymer with a polyol component comprising a polyester polyol having a free glycol content of less than about 7 percent by weight of the polyester polyol in the presence of a blowing agent. The combined use of the quasi-prepolymer and the polyester polyol enhances the thermal insulating properties of the foams.

Abstract: This invention relates to a process for manufacturing a spray urethane elastomer. More particularly it relates to a process for manufacturing a solventless, non-cellular spray urethane elastomer, which comprises spraying a partial prepolymer component having a high molar ratio of NCO/OH prepared from an organic polyisocyanate and from polytetramethylene ether glycol (PTMEG) having a molecular weight of 400 to 2000 and a resin component containing the PTMEG, a specified chain extender and an organobismuth compound catalyst onto a substrate by use of a two components high pressure spray machine.According to the present invention, spraying only of the stock solutions by use of the two components high pressure spray machine accomplishes coating and the stock solutions are cured in one second to ten and several seconds after being sprayed without producing cells even when thick-coated.

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: Polyurethane foams having a specified glass transition temperature are densified for transportation or other purposes by heating the foam to a temperature above its T.sub.g, compressing the heated foam, and then cooling the compressed foam to a temperature below its T.sub.g. The cooled foam remains in a densified state until re-heated to a temperature above its T.sub.g, whereupon it re-expands to assume its original dimensions.

Abstract: The present invention relates to a process for the production of polyurethane foams by the reaction of 1) polyisocyanates with 2) polyesters, polycarbonates, polylactones, or polyamides having a molecular weight range of about 400 to about 10,000 and containing at least two isocyanate reactive hydrogen atoms, or mixtures thereof, in the presence of 3) water and/or organic blowing agents, 4) catalysts and 5) flame-retardants, and optionally in the presence of 6) compounds with molecular weights of from 32 to 399 containing at least two isocyanate reactive hydrogen atoms and 7) surface-active additives and other auxiliary agents known in the art. The flame-retardants consist of graphite which has been modified with inorganic expandable materials, either alone or in combination with an inorganic co-flame-retardant.

Abstract: A deodorizing urethane foam comprising a urethane foam substrate and a deodorizing component. The deodorizing component is composed of (A) a Diels-Alder reaction-type addition reaction product between an alpha,beta-unsaturated dicarboxylic anhydride and an olefin or a derivative of the reaction product and optionally (B) a copper compound. This urethane foam is produced by foaming a mixture of materials for the urethane foam substrate and the Diels-Alder reaction-type addition reaction product between an alpha,beta-unsaturated dicarboxylic anhydride and an olefin or its derivative of the reaction product and optionally the copper compound.

Abstract: A shock-absorbing polyurethane foam is formed of a polyol component and a polyisocyanate component. The polyol component is a mixed polyol having an average hydroxyl number of 130-250 and composed at least of 20-70 parts by weight of a low-molecular polyol having a molecular weight of 300-500 and 80-30 parts by weight of a high-molecular polyol having a molecular weight of 1,500-8,000 per 100 parts by weight of the whole polyol component. The foam further contains 5-150 parts by weight of a plasticizer having a solidification point not higher than -20.degree. C. per 100 parts by weight of the whole polyol component. The foam can be produced by reacting the polyol component and polyisocyanate component in the presence of 5-150 parts by weight of the plasticizer per 100 parts by weight of the polyol component.

Abstract: A molded flexible polyurethane composition having improved polycarbonate compatibility comprising an organic polyisocyanate, a polyol and reactive tertiary amine catalyst. This catalyst contains at least one active hydrogen and/or hydroxyl group in its structure. Another embodiment of this invention relates to a molded flexible polyurethane composition having improved polycarbonate compatibility comprising an organic polyisocyanate, a polyol, a non-reactive tertiary amine catalyst and, an amine scavenger composition which may or may not also contain reactive tertiary amine catalysts. Also disclosed are processes for making said molded flexible polyurethane compositions having improved polycarbonate compatibility.

Abstract: The present invention relates to a process for the preparation of polyurethane foams comprising reacting polyisocyanates with dispersions of (i) polymer-containing relatively high molecular weight hydroxyl compounds that are prepared by reaction of mono- or polyisocyanates with NH-containing compounds selected from the group consisting of polyamines containing primary and/or secondary amino groups, hydrazines, hydrazides, and alkanolamines in (ii) a compound containing 1 to about 8 primary and/or secondary hydroxyl groups and having a molecular weight of about 400 to about 16,000, in the presence of water and/or organic blowing agents; catalysts; and flameproofing agents comprising an expandable graphite modified by inorganic expandable materials, alone or in combination with inorganic co-flameproofing agents.

Abstract: The present invention provides a composition comprising a combustible material containing urethane linkages; and as a smoke and toxic gas suppressant, a polyester which has an acid value below 30 mg KOH/g, preferably below 10 mg KOH/g, and which is derived from:Ia.[A] a component which contains 4 carboxyl groups or anhydride thereof, and which is preferably an aromatic component, orIb. a mixture of [A] and [B]:[B] one or more components which contain 2 to 12, preferably 2 to 4, carboxyl groups or 1 to 6, preferably 1 or 2, carboxylic anhydride groups, selected from:[B.sub.1 ] an aliphatic carboxylic acid compnent containing 2-16 carbon atoms; [[B.sub.2 ] a cyclic non-aromatic carboxylic acid containing 7-17 carbon atoms; and[B.sub.3 ] an aromatic carboxylic acid containing 8-16 carbon atoms; andII.

Abstract: The invention concerns constrained layer sound damping. A composition and a laminated structure are provided for the reduction of noise coming from housings such as oil pans for automobiles. The composition comprises a rubbery polyurethane, an olefin polymer, and a filler. The laminated structure comprises the housing, the composition, and a sheet metal liner. The composition contains a blowing agent which is activated to provide a single unitary structure which dampens noise. The polyurethane and olefin polymer are thoroughly intermixed with each other, but maintain their separate identities in the blend.