Abstract: Tertiary amines having carbonate and urethane groups and optionally hydroxyl groups are produced by reacting a) a polyhydric alcohol and b) a primary-tertiary diamine with c) a carbonic acid derivative selected from the group consisting of optionally cyclic carbonates, urea, phosgene and bis-chlorocarbonates of alcohols of the same type as those used as component a). This reaction may be carried out in one or two steps. The tertiary amines produced by this process are useful as catalysts, which may optionally be incorporated into an isocyanate-reactive material, in the isocyanate addition reaction for the production of polyurethane plastics. These tertiary amines are particularly useful for the production of foam backed plastic films.

Abstract: The invention pertains to flame retardant flexible polyurethane foams prepared by reacting a polyether polyol and an organic isocyanate in the presence of a blowing agent and incorporating melamine and an effective amount of another flame retardant. The organic isocyanate comprises carbodiimide-uretonimine-modified diphenylmehtane diisocyanate and toluene diisocyanate. The polyurethane foams exceed conventional flame retardancy standards and exhibit flame spread index values of less than 25 as measured under flame test procedure ASTM D3675-90.

Abstract: Disclosed are foamable EPDM compositions comprising EPDM, a carbon black having a CTAB of about 50 to 60 m2/g and DBP of 90 to 115 cc/100 g and a blowing agent which are advantageous for use in applications where UHF microwave curing is utilized and for replacing foamable EPDM compositions incorporating similar amounts of conventional blends of carbon blacks. Also disclosed are foamed, cured EPDM compositions comprising: EPDM and a carbon black having a CTAB of about 50 to 60 m2/g and DBP of 90 to 115 cc/100 g which have advantageously lower sponge density and lower sponge compression set than EPDM compositions incorporating similar amounts of conventional low reinforcing carbon blacks. Further disclosed is a process for producing the foamed, cured EPDM compositions of the present invention. Additionally disclosed is use of the foamed, cured EPDM compositions of the present invention as weatherstripping.

Abstract: A fluorine-containing hydrocarbon composition comprising the following (1) and (2), wherein the proportions of (1) and (2) in the composition are such that (1) is 100 parts by weight, and (2) is from 0.001 to 10 parts by weight:(1) at least one pentafluoropropane selected from 1,1,1,3,3-pentafluoropropane and 1,1,2,2,3-pantafluoroproapne,(2) the following (i) or (ii):(i) a combination of (a) and at least one member selected from the following (b) to (e):(a) a compound having --NO.sub.2,(b) a compound having --CN,(c) a compound having --CONR.sup.1 R.sup.2 wherein each of R.sup.1 and R.sup.2 which are independent of each other, is a hydrogen atom or an alkyl group,(d) a lactone,(e) a quinone,(ii) at least one member selected from the following (f) and (g):(f) a reaction product of a compound having a halogen atom and an epoxy group with an active hydrogen compound,(g) a reaction product of a compound having a halogen atom and a hydroxyl group with an isocyanate compound.

Abstract: Disclosed is a carbamate adduct prepared by contacting carbon dioxide with an alkanolamine, preferably in a polar medium. The alkanolamine is characterized in that it consists of 1 or 2 ether linkages per molecule. The adduct finds value as a thermally decomposable blowing agent when preparing polyurethane foam and elastomeric products. Integral-skinned polyurethane products prepared in the presence of the carbamate adducts disclosed herein exhibit an enhanced abrasion resistance.

Abstract: A polyurethane foam is constituted by using a blowing agent selected from the group consisting of iodofluorohydrocarbons, perfluoroalkenes and hydrogen-containing fluoromorpholine derivatives. These blowing agents have a low thermal conductivity and a short life in the air, and thus impose no or very small load such as ozone layer depletion potential (ODP) and global warming potential (GWP) on the environment. The iodofluorohydrocarbon, in particular, can give an incombustibility and self-extinguishing property to the conventionally used inflammable substance such as cyclopentane or the like, and thus is also advantageous from the viewpoint of safety of the thermal insulating material.

Abstract: The invention relates to a halogen-free, flame retardant rigid polyurethane foam based on polyether-polyols and polyisocyanates, which comprises, as the polyol component, mixtures of nitrogen-free and nitrogen-containing polyether-polyols and, as the flameproofing agent, ammonium polyphosphate.

Abstract: A polyol composition is provided which when reacted with an organic isocyanate, has good flow characteristics and makes a rigid polyurethane foam having good dimensional stability at low densities. The polyol composition has a polyol component which must have present a polyoxyalkylene polyether polyol having an equivalent weight of 130 or less and a hydroxyl number of 400 or more, a polyoxyalkylene polyether polyol having an average functionality from 1.5 to 3.1 and a viscosity of less than 800 cP at 25.degree. C., and a polyoxyalkylene polyether polyol having an average functionality of greater than 3.1 and a viscosity of 5,000 cp or less at 25.degree. C. The polyol composition also has formic acid or a mixture of formic acid and water as blowing agents, and further contains a delayed action blow catalyst and a delayed action gel catalyst.

Abstract: A process is described for producing polyurethane moldings by the reaction of compounds of molecular weight 400 to 10,000 which contain at least 2 hydrogen atoms capable of reacting with isocyanates, and optionally chain extenders of molecular weight 32 to 399, with polyisocyanates, optionally in the presence of foaming agents, auxiliary materials and additives, in which defined carbamates are used as activators. The polyurethanes obtained by this process are particularly low in emissions, i.e. are stable in relation to diffusion and exhibit low fogging, and are thus particularly suitable for the production of composite bodies comprising a polyurethane core and at least one further plastic material as an outer layer. Also described is the use of these moldings and composite bodies which are stable in relation to diffusion and which cause low fogging, e.g. as dashboards or door trims in the construction of vehicles, furniture, machines or apparatus.

Abstract: Flame-resistant flexible polyurethane foams are produced by reactinga) organic and/or modified organic polyisocyanates,b) relatively high molecular weight compounds containing at least two reactive hydrogen atoms andc) if desired, low molecular weight chain extenders in the presence ofd) catalysts,e) blowing agentsf) flame retardants,and, if desiredg) auxiliaries and/or additives,where the flame retardants f) used are melamine in combination with at least one anionic dispersant.

Abstract: A polyurethane foam is constituted by using a blowing agent selected from the group consisting of iodofluorohydrocarbons, perfluoroalkenes and hydrogen-containing fluoromorpholine derivatives. These blowing agents have a low thermal conductivity and a short life in the air, and thus impose no or very small load such as ozone layer depletion potential (ODP) and global warming potential (GWP) on the environment. The iodofluorohydrocarbon, in particular, can give an incombustibility and self-extinguishing property to the conventionally used inflammable substance such as cyclopentane or the like, and thus is also advantageous from the viewpoint of safety of the thermal insulating material.

Abstract: A process for the preparation of flame-resistant soft polyurethane foams which produce less smoke in the event of fire involves reactinga) an organic polyisocyanate and/or a modified organic polyisocyanate withb) a high-molecular-weight compound containing at least two reactive hydrogen atoms and, if desired,c) a chain extender and/or crosslinking agent, in the presence ofd) a mixture of flameproofing agents which contains:di) melaminedii) expandable graphite and, if desired,diii) at least one further flameproofing agent, preferably a modified or unmodified ammonium polyphosphate,e) a blowing agent,f) a catalyst and, if desired,g) assistants and/or additives, and melamine/expandable graphite/polyether-polyol dispersions which are suitable for this purpose.

Abstract: Expandable styrene resin beads are described, which, when expanded to a bulk density of 20 g/l, give pre-expanded beads in which the number of cells present along those surface parts of radii which range from the bead surface to a depth of 0.2 mm from the surface is from 3 to 20 per mm and to the bead center is 10 or larger per mm, the number of the number of cells present along those inner parts of the radii which range from a depth of 1 mm from the bead surface to the bead center is 10 or larger per mm, the number of cells present along said surface parts being smaller than the number of cells present along said inner parts.

Abstract: Rigid foams which possess urethane groups are prepared by reacting polyisocyanates with compounds which possess at least two active hydrogen atoms which are reactive towards isocyanate groups, in the presence of water and alkanes as blowing agent and solution promoters. The solution promoter used is a compound with a polar group.

Abstract: The present invention is directed to a process for the preparation of a molded product. The method requires the introduction of a polyurethane foam forming reaction mixture into a mold. The present invention is directed to the use of a metal carboxylate salt of an amino acid as a catalyst for the reaction.

Abstract: A method the preparation of rigid foams by reacting an organic polyisocyanate with an isocyanate-reactive material in the presence of a blowing promoter characterised in that the isocyanate-reactive material comprises at least one isocyanate-reactive cyclic carbonate or isocyanate-reactive cyclic urea, the reaction being performed in the presence of an inert insoluble organic liquid which is present as the dispersed phase of an emulsion or a microemulsion, and in the presence of a metal salt catalyst.

Abstract: The flame-resistant polyurea foam of the invention contains calcium sulfate dihydrate as filler and ammonium polyphosphate as flame retardant. Its bulk density is from 25 to 250 kg/m.sup.3 and the number of open cells is above 80% of all its cells. The polyurea has been formed from a reaction of prepolymers of diphenylmethane 4,4'-diisocyanate with water.The polyurea foam of the invention can be used as a block foam or on-site foam for sound and/or heat insulation.

Abstract: A resin composition for low expansion moldings which comprises (A) 20 to 80 parts by weight of a vinyl chloride resin having an average degree of polymerization of from 500 to 1700 and (B) correspondingly from 80 to 20 parts by weight of a copolymer made of 60 to 90 parts by weight a polymerizable monomer mixture consisting of 20 to 40 wt % of acrylonitrile, 20 to 60 wt % of .alpha.-methylstyrene and 20 to 40 wt % of styrene and, correspondingly, 40 to 10 parts by weight of a crosslinked acrylic rubber. The resin composition further comprises (C) 0.5 to 30 parts by weight of an acrylic resin having a reduced viscosity of not less than 3.0 dl/g when measured by use of a chloroform solution of the acrylic resin at a concentration of 0.1 g/100 ml, (D) 0.1 to 10 parts by weight of a thermally decomposable rosining agent, and (E) from 1 to 10 parts by weight of a stabilizer, each based on 100 parts by weight of a mixture of the components (A) and (B).

Abstract: The invention provides a biodegradable thermoplastic composition made of soy protein, a plasticizing agent, a foaming agent, and water, that can be molded into biodegradable articles that have a foamed structure and are water-resistant with a high level of physical strength and/or thermal insulating properties.

Abstract: A method for the preparation of rigid foams by reacting an organic polyisocyanate with an isocyanate-reactive material in the presence of a blowing promoter characterized in that the isocyanate-reactive material comprises at least one isocyanate-reactive cyclic carbonate or isocyanate-reactive cyclic urea, the reaction being performed in the presence of an inert insoluble organic liquid which is present as the disperse phase of an emulsion or a microemulsion, and in the presence of a metal salt catalyst.

Abstract: Disclosed are foamable EPDM compositions comprising EPDM, a carbon black having a CTAB of about 50 to 60 m2/g and DBP of 90 to 115 cc/100 g and a blowing agent which are advantageous for use in applications where UHF microwave curing is utilized and for replacing foamable EPDM compositions incorporating similar amounts of conventional blends of carbon blacks. Also disclosed are foamed, cured EPDM compositions comprising: EPDM and a carbon black having a CTAB of about 50 to 60 m2/g and DBP of 90 to 115 cc/100 g which have advantageously lower sponge density and lower sponge compression set than EPDM compositions incorporating similar amounts of conventional low reinforcing carbon blacks. Further disclosed is a process for producing the foamed, cured EPDM compositions of the present invention. Additionally disclosed is use of the foamed, cured EPDM compositions of the present invention as weatherstripping.

Abstract: A process, and the product produced thereby, for preparing a polyurea foam which comprises reacting an aliphatic polyamine having an average functionality from about 2 to about 6 wherein about 55 to about 95 percent of the functional groups are primary amine functional groups and about 5 to about 40 percent of the functional groups are primary or secondary hydroxyl groups with a polyisocyanate in the presence of a blowing agent that comprises water. The use of polyether polyamines having primary hydroxyl groups improves the cross-linking characteristics of the polyurea foam.

Abstract: A process for the preparation of a fine celled, closed celled rigid polyurethane or urethane-modified polyisocyanate foam is disclosed which comprises reacting a polyfunctional isocyanate-reactive composition with a polyisocyanate composition, characterized in that the foam-forming composition comprises carbon black.

Abstract: Stable and water-resistant aqueous foam composition containing (1) a long chain cationic organic compound and (2) a long-chain anionic organic compound in a weight ratio of from 0.05:1 to 15:1. The stable foam composition of the invention may be mixed with various water-soluble or water-dispersible organic, polymeric, or inorganic substances and used in applications where lightweight, heat, sound or other insulative, barrier properties or homogeneous material distribution are needed. Such applications include cementitious or gypsum containing substances, adhesives, binders, paper treating materials, coatings, ceramics, landfills, geofills, and firefighting and fireproofing materials.

Abstract: The present invention relates to foam compositions which are expanded with hydrohalocarbon blowing agents in the presence of catalysts which result in a decreased amount of decomposition of the hydrohalocarbon blowing agents to haloalkenes during the polymerization. Thus, the present invention provides compositions comprising polyisocyanate, polyol, hydrohalocarbon blowing agent, surfactant, and at least one catalyst for polymerization of the polyisocyanate and polyol wherein the catalyst is less volatile than N,N-dimethylcyclohexylamine or the catalyst is a tertiary amine having at least one isocyanate-reactive functionality selected from the group consisting of --OH and --NH-- and the catalyst results in a decreased amount of decomposition of the hydrohalocarbon blowing agents to haloalkenes during polymerization of the polyisocyanate and the polyol and especially during use of the foam samples at a temperature of at least about 54.degree. C.

Abstract: A polyol composition is provided which when reacted with and organic isocyanate, has good flow characteristics and makes an all water blown rigid polyurethane foam having good dimensional stability at low core densities of 1.1 pcf to 2.0 pcf. The polyol composition has a polyol component which must have present a polyoxyalkylene polyether polyol having an equivalent weight of 130 or less, an average functionality of 3.1 or greater, and a hydroxyl number of 400 or more, a polyoxyalkylene polyether polyol having an average functionality from 1.5 to 3.1 and a viscosity of less than 800 cP at 25.degree. C., and a polyoxyalkylene polyether polyol having an average functionality of greater than 3.1 and an equivalent weight of greater than 130. The polyol composition also has water as the blowing agent, and further contains a blow catalyst, a delayed action gel catalyst, and preferably a cure catalyst and a surfactant.

Abstract: Polyurethane, polyisocyanurate and polyurea polymers, particularly foamed polymers can be prepared from formulations including non-silicone polyether surfactants. The non-silicone polyether surfactants can be polyethers having from about 10 to about 90 weight percent oxyethylene units and from about 10 to about 90 weight percent oxyalkylene units having at least 4 carbons. The non-silicone polyether surfactants can be used to prepare foams having properties substantially similar to foams prepared with conventional silicone based surfactants.

Abstract: An internal mold release system is provided which comprises (a) a carboxylic acid and (b) a compound selected from the group consisting of a fatty polyester, a fatty acid ester and a fatty amide.

Abstract: The invention forms in situ carbon dioxide blown closed cell insulating foams in which blowing is achieved by the evolution of carbon dioxide resulting from partial hydrolysis of polyisocyanate (methyl diphenyl diisocyanate) by water in the resole. The invention uses no additional blowing agent. The reaction is fast and the resulting product has small, closed cells that exhibit long term thermal performance.

Abstract: Foamable compositions comprise (a) at least one normally liquid, unsaturated perfluorochemical blowing agent compound selected from the group consisting of perfluoroolefin compounds, e.g., perfluoro(4-methylpent-2-ene), perfluoroaromatic compounds, e.g., hexafluorobenzene, and perfluorocycloolefin compounds, e.g., perfluorocyclohexene, the perfluoroolefin compounds optionally containing one or more catenary heteroatoms; and (b) at least one foamable polymer or the precursors of at least one foamable polymer. The compositions are useful in preparing polymeric, e.g., polyurethane, foams.

Abstract: A foamed plastic manufactured by foaming a mixture of a resin and a volatile polymerizable foaming agent, wherein the pressure in the foams of the foamed plastic is less than atmospheric pressure, is disclosed. Further, a foamed plastic manufactured by hermetically sealing with an airtight film and foaming a mixture of a resin and a volatile polymerizable foaming agent, wherein the pressure in a gap region between the airtight film and the foamed plastic and the pressure in the foams of the foamed plastic are less than atmospheric pressure is disclosed. Further, a method of manufacturing foamed plastic comprising foaming a mixture of a volatile polymerizable foaming agent and a resin, and irradiating the foamed plastic with an energy beam.

Abstract: The invention relates to novel polysilicic acid/polyisocyanate basic materials, binding materials and foams with improved mechanical properties as well as a higher resistance against heat and chemicals. It is characteristic of the new base materials that they are built up (composed) of______________________________________ 100 parts by mass of a polyisocyanate, 50-400 parts by mass of a polysilicic acid component, 0.5-70 parts by mass of phosphoric acid triesters and/or salts of phosphoric acid mono- and/or diesters formed with amines and/or alkaline metals, and optionally 0-5 parts by mass of a catalysts containing a tertiary amino group, 0-50 parts by mass of a reactive diluent, 0-10 parts by mass of tenside(s) ______________________________________as well as 0-400% by mass of fillers and optionally other auxiliaries, calculated for the total mass (=100%) of the components listed above.

Abstract: Disclosed is an active hydrogen-containing composition suitable for the production of flexible polyurethane foam when reacted with a polyisocyanate, said composition comprising,(a) a polyol having an average functionality of about 2.0 to about 4.0, and an equivalent weight in the range of from about 500 to about 5000;(b) from about 0.5 to about 5 parts, per 100 parts by weight of component (a), of a crosslinker selected from the group consisting of monoethanolamine, diethanolamine, triethanolamine, monoisopropanolamine, diisopropanolamine, methylene bis(o-chloroaniline) and mixtures thereof; and(c) from about 0.3 to about 15 parts per 100 parts by weight of component (a), of a compound having at least 3 hydroxyl groups, at least two of which are secondary hydroxyl groups; and an equivalent weight of less than about 500;as well as flexible polyurethane foams prepared therefrom.

Abstract: A process for foaming polyurethane reactive hot melt adhesive comprising the steps of:a) melting a reactive polyurethane adhesive containing 0.05 to 0.5% by weight of a 2,2'dimorpholinodiethyl ether or di(2,6-dimethylmorpholinodiethyl)ether catalyst in a heated reservoirb) pumping the adhesive from the heated into a heated reservoir recirculating foaming device;c) foaming the adhesive by injecting therein an effective amount of an anhydrous gas;d) discharging a portion of the foamed adhesive through an orifice onto a substrate to be bonded; ande) recirculating the remaining foamed adhesive back to the foaming device for discharge at a later time.

Abstract: Provided is a composition for making a foam including a reactive phenolic resin, urea, and an isocyanate. Also provided is a method for making the foam and a foam made from the composition.

Abstract: The present invention is directed to an underlayment composition for an artificial playing surface comprised of a butadiene rubber, such as polybutadiene or styrene-butadiene that is commercially available as recycled polycord tires that have been granulized. An inorganic-base moisture-retaining agent such as vermiculite or perlite is also included in the composition in addition to a binder comprised of a mixture of isocyanate polyurethane and an inorganic acid. The present invention also provides a method of making the present composition. The method comprises the steps of mixing thoroughly granulized particles of butadiene rubber in a mixing container, mixing an inorganic-based moisture-retaining component with the butadiene rubber, mixing an acid having a pH .ltoreq.3 with the butadiene rubber and the inorganic-based moisture-retaining component, and mixing an isocyanate polyurethane with the butadiene rubber, the inorganic-based moisture-retaining component and the acid.

Abstract: A process for the preparation of a fine celled, closed celled rigid polyurethane or urethane-modified polyisocyanate foam is disclosed which comprises reacting a polyfunctional isocyanate-reactive composition with a polyisocyanate composition, characterized in that the foam-forming composition comprises carbon black.

Abstract: Polyurethane, polyisocyanurate and polyurea polymers, particularly foamed polymers can be prepared from formulations including non-silicone polyether surfactants. The non-silicone polyether surfactants can be polyethers having from about 10 to about 90 weight percent oxyethylene units and from about 10 to about 90 weight percent oxyalkylene units having at least 4 carbons. The non-silicone polyether surfactants can be used to prepare foams having properties substantially similar to foams prepared with conventional silicone based surfactants.

Abstract: This invention relates to a kind of superfine microelemental biochemical mixture and its foamed plastic products. The mixture contains titanium oxide, zirconia, silica, yttrium oxide, cerium oxide, tin dioxide, silver phosphate and other microelements, and has certain impact on human body's micro-circulation. The plastic products comprise the mixture according to the invention and base materials which conventionally are used in preparation for foamed plastics.

Abstract: A method for preparing a polyester flexible slabstock polyurethane foam which comprises reacting an organic polyisocyanate and a polyester polyol in the presence of a blowing agent, optionally a cell stabilizer and a catalyst composition consisting essentially of N-methylimidazole or 1,2-dimethylimidazole, or both.

Abstract: A foamed plastic manufactured by foaming a mixture of a resin and a volatile polymerizable foaming agent, wherein the pressure in the foams of the foamed plastic is less than atmospheric pressure, is disclosed. Further, a foamed plastic manufactured by hermetically sealing with an airtight film and foaming a mixture of a resin and a volatile polymerizable foaming agent, wherein the pressure in a gap region between the airtight film and the foamed plastic and the pressure in the foams of the foamed plastic are less than atmospheric pressure is disclosed. Further, a method of manufacturing foamed plastic comprising foaming a mixture of a volatile polymerizable foaming agent and a resin, and irradiating the foamed plastic with an energy beam.

Abstract: A method for the preparation of cellular polymeric products which comprises reacting an organic polyisocyanate with an isocyanate-reactive composition, characterised in that the isocyanate-reactive composition comprises a blowing promoter which is a cyclic urea compound having at least one isocyanate-reactive substituent.

Abstract: An internal mold release system is provided which comprises (a) a carboxylic acid and (b) a compound selected from the group consisting of a fatty polyester, a fatty acid ester and a fatty amide.

Abstract: A foamable organic composition comprising a compound foamable to 50% or more comprising an organic polymer and a chemical foaming agent, and, as a physical foaming agent, at least one member selected from the group consisting of rare gases and carbon dioxide; and a method for producing a foamed article having a high expansion ratio by using said composition. According to the present invention, a foamed article having a uniform and fine foam structure and a high expansion ratio of not less than 75% (which is as high as when freon gas is used) can be obtained without causing environmental problems such as depletion of the ozon layer. When applied, in particular, to a foamed layer for an insulated conductor, such as foam-insulated electric wire which is required to have high performance insulation and is occasionally installed under severe conditions, the composition of the present invention advantageously provides an insulated conductor with no potential buckling.

Abstract: An azeotropic composition made up of from about 73 to about 87% by weight of 1,1,1,4,4,4-hexafluorobutane and from about 13 to about 27% by weight of n-pentane is used as a blowing agent in a process for the production of polyurethane foams.

Abstract: A flexible polyurethane foam is made by reacting an isocyanate with a polyol in the presence of a foam-forming agent and a fire-retardant additive. The fire-retardant additive comprises melamine and this is used in conjunction with a polyol which is of the polymer-modified polyol kind, i.e. a polyol containing a polymeric substance such as a dispersed alkanolamine/isocyanate polyaddition product.

Abstract: The present invention relates to three-dimensional expanded polyurethane foam materials, such as flexible reticulated polyurethane foam compositions, that are electrically conductive and have antistatic properties. More specifically, the invention relates to a polyurethane foam having long-lasting and reliable electrical conductivity characteristics and a volume resistivity of approximately 10.sup.12 ohm.multidot.cm or less at ambient room temperature (about 70.degree. F.). This foam is produced by combining conventional polyurethane foam-forming reactants and an effective amount of an antistatic agent such as tetracyanoquinodimethane (TCNQ) or sodium perchlorate under foam-forming conditions. In one preferred embodiment, the conductive foam is subsequently reticulated by momentary exposure to a flame front.

Abstract: The present invention relates to foam compositions which are expanded with hydrohalocarbon blowing agents in the presence of catalysts which are capable of decreasing the amount of decomposition of the hydrohalocarbon blowing agents to haloalkenes during the polymerization. Thus, the present invention provides compositions comprising polyisocyanate, polyol, hydrohalocarbon blowing agent, surfactant, and catalyst for polymerization of the polyisocyanate and polyol wherein the catalyst is capable of decreasing the amount of decomposition of the hydrohalocarbon blowing agents to haloalkenes during polymerization of the polyisocyanate and the polyol.

Abstract: A method for preparing a polyurethane foam which comprises reacting an organic polyisocyanate and a polyol in the presence of a blowing agent, a cell stabilizer and a catalyst composition consisting essentially of a compound of structure I ##STR1## wherein R is hydrogen, a C.sub.1 -C.sub.4 alkyl, C.sub.6 -C.sub.8 aryl, or C.sub.7 -C.sub.

Abstract: A process for curing and foaming epoxidized diene polymers which comprises contacting the polymer with a nonaromatic anhydride curing agent at an epoxy/anhydride molar ratio from 0.6 to 1.4 and from 2 to 10 phr of an accelerator at a temperature of from 100.degree. to 200.degree. C. for a period of 10 minutes to six hours.