Abstract: Polymeric foam and polymeric foam products that contain a foamable polymer material, at least one hydrofluorocarbon (HFC) blowing agent, an infrared attenuating agent such as nanographite, and propylene carbonate, ethylene carbonate, or butylene carbonate as a process additive are provided. In one or more embodiments, the HFC blowing agent is 1,1-difluoroethane (HFC-152a), 1,1,1,2-tetrafluoroethane (HFC-134a), or a combination of 1,1-difluoroethane (HFC-152a) and 1,1,1,2-tetrafluoroethane (HFC-134a). The propylene carbonate, ethylene carbonate, or butylene carbonate acts as a cell enlarger to increase the average cell size of the foamed product, as a process aid, as a plasticizer, and lowers the die pressure. The inventive foam composition produces extruded foams that have insulation values (R-values) that are equal to or better than conventional extruded, closed cell foams produced with 1-chloro-1,1-difluoroethane (HCFC-142b). In exemplary embodiments, less than 4% of the cells are open cells.

Abstract: Energy-activated room temperature-pumpable polymer compositions, devices for activating and processing the same into solid cellular or non-cellular polymeric materials that can be used as adhesives, sealants, coatings or gasket materials, and methods of making and using the same. The compositions according to the invention include solid particles that include one or more polymers, which are emulsified, dispersed or suspended in a liquid carrier together with at least one processing aid, such as a reactive blowing agent, a low molecular weight surfactant, a high molecular weight surfactant, one or more compounds found in latex paint, starch, cellulosic derived products and combinations of two or more thereof. The processing aids provide various benefits including, for example, reduced density, improved process hygiene, improved foam stability, faster bonding times and/or lower processing temperatures.

Abstract: Disclosed is a microporous high density polyethylene film for a battery separator and a method of producing the same. The microporous high density polyethylene film includes high density polyethylene with a weight average molecular weight of 2×105-5×105, containing 5 wt % or less molecule with a molecular weight of 1×104 or less. The microporous high density polyethylene film has tensile strengths of 1,100 kg/cm2 or more in transverse and machine directions respectively, a puncture strength of 0.22 N/?m or more, a gas permeability (Darcy's permeability constant) of 1.3×10?5 Darcy or more, and shrinkages of 5% or less in machine and transverse directions, respectively. Particularly, the microporous high density polyethylene film has an excellent extrusion-compoundabiliy and stretchability and a high productivity, and can improve the performances and stability of a battery produced using the same.

Abstract: A masterbatch composition comprising an aromatic polyester resin, a polyolefin and a polyfunctional compound selected from the dianhydrides of tetracarboxylic aromatic and/or aliphatic acids and the polyepoxidic compounds, wherein the polyester resin and the polyfunctional compounds are omogeneously dispersed as solids in a matrix formed by the polyolefin, as domains of average particle size less than 800?. The masterbatch is prepared by milling polyester resins and polyolefin granules to obtain powders having average particle size of less than 200?, and the powders are therafter homogeneously mixed.

Abstract: The invention pertains to a process for producing a cross-linked polyolefin foam in a continuous process using standard processing equipment without using a moisture cross-linking step after processing. In this method, a vinyl functional silane compound is melt grafted onto a low density polyethylene in the presence of a free radical generator. The resulting silane grafted polyethylene resin is mixed and melted with a blowing agent in a continuous process in the presence of water to form a vinyl functional silane foam.

Abstract: An object of the present invention is to provide a multi-layered polylactic acid resin foamed body of a crystalline polylactic acid resin which has good appearance and excellent mechanical strength such as bending strength and compressive strength and which is capable of being imparted with excellent heat resistance, and to provide a multi-layered polylactic acid resin foamed molded article having excellent appearance, heat resistance and mechanical strengh. The multi-layered polylactic acid resien foamed body of the present invention is a laminate having a polylactic acid resin foamed layer and a thermoplastic resin layer provided at least one side of the foamed layer, wherein the foamed layer has a cell shape satisfying specific conditions, wherein the difference (?Hendo:2° C./min??Hexo:2° C./min) between an endothermic calorific value (?Hendo:2° C./min) and an exothermic calorific value (?Hexo:2° C.

Abstract: A resin particle having a sufficiently narrow particle size distribution obtainable by using a supercritical fluid, and a production method for obtaining a resin particle having a sufficiently narrow particle size distribution by using a supercritical fluid are provided. The present invention provides a resin particle (C) having a microparticle (A) fixed to or formed as a film on a surface of a resin particle (B) containing a resin (b), wherein the degree of swelling of the microparticle (A) by liquid or supercritical carbon dioxide (X) at a temperature lower than the glass transition temperature or the melting point of the microparticle (A) is 16% or less, and the microparticle (A) is at least one kind selected from the group consisting of a crystalline resin (a1), a noncrystalline resin (a2), and an inorganic compound (a3).

Abstract: An object of the present invention is to provide an extruded propylene-based resin foam in which a average diameter of cells therein can be reduced while a high expansion ratio remains high, thereby providing an excellent insulation efficiency. The extruded propylene-based resin foam according to the present invention is extruded propylene-based resin foam that is formed by extrusion-foaming a propylene-based resin, and the extruded propylene-based resin foam has the expansion ratio of 10 or more and the average cell diameter of less than 400 ?m. With this configuration, the extruded foam can have a plurality of air bubble walls therein. Thus, the extruded propylene-based resin foam can efficiently block external radiant heat, thereby realizing excellent insulation efficiency.

Abstract: Expanded and extruded biodegradable polymer foams are obtained using biodegradable polymers and environmentally benign non-VOC methyl formate as a blowing agent. The blowing agent can be a blend further including at least one co-blowing agent, preferably an environmentally friendly species (e.g., non-VOC), which is either a physical co-blowing agent (e.g. an inorganic agent, a hydrocarbon, a halogenated hydrocarbon, a hydrocarbon with polar, functional group(s), water or any combination thereof), or a chemical co-blowing agent, or combinations thereof. The blowing agent blend can include any combination of methyl formate and one or more co-blowing agents. The polymer foam can include a biodegradable polymer or its blends with other biodegradable polymers or conventional (non-biodegradable) polymers. The methyl formate-based blowing agent blends produce stable foams for various applications, including containers, packaging systems, as well as for insulation and protective cushioning.

Abstract: Described is a process for making closed cell fluoropolymer foam, and the foam so made. The process includes subjecting a fluoropolymer resin an inert gas at a pressure higher than atmospheric to drive gas into the resin, raising the temperature of the resin to or above its softening point, and reducing the pressure while maintaining the temperature at or above the softening point of the resin, in order to expand the resin to result in closed cell fluoropolymer foam. The resin is cross-linked prior to expansion. The resulting foams can be used in various applications, such as in flotation devices and for making thermal and/or acoustic insulation.

Abstract: Embodiments of the present disclosure can include polyurethane or polyisocyanurate board stock foam having a biobased content of 7% or greater as measured by ASTM D6866. In addition, embodiments of the present disclosure relate to the use of renewable material for producing aromatic polyesters polyols and/or resins to generate foam products having biobased content.

Abstract: A constrained layer damping structure is provided, including a panel to be damped, a constraining layer and a layer of foam vibration damping material sandwiched therebetween. In one embodiment, the foam vibration damping material is provided from a composition including 5-50 weight percent polyvinyl butyral, 2-20 weight percent plasticizer, 25-65 weight percent filler, 1-15 weight percent tackifier, and 0.1-8 weight percent blowing agent, wherein the composition includes 15-65 weight percent total thermoplastic inclusive of polyvinyl butyral. In a further embodiment, the polyvinyl butyral is provided as recycled material from recycled auto glass, and includes a small quantity of plasticizer, typically but not necessarily of the phthalate-type or hexanoate-type.

Abstract: The invention is directed to polyethylene foam based on a blend comprising 95.5-99.5% by weight low density polyethylene and 0.5-4.5% by weight high density polyethylene and a nucleating agent. The invention is also directed to a process for physical foaming of a blend comprising 95.5-99.5% by weight low density polyethylene and 0.5-4.5% by weight high density polyethylene in the presence of a physical blowing agent and a nucleating agent.

Abstract: A method comprising contacting a first styrenic polymer composition comprising residual styrene monomer with a molecular sieve, and recovering a second styrenic polymer composition comprising a reduced amount of residual styrene monomer. A composition comprising a styrenic polymer having a residual styrene monomer amount of less than 100 ppm produced by contacting a styrenic polymer composition having a residual styrene monomer amount of equal to or greater than 100 ppm with a molecular sieve, and recovering the styrenic polymer having a residual styrene monomer amount of less than 100 ppm. A method comprising providing a styrenic polymer composition having a residual styrene monomer amount of equal to or greater than 100 ppm, contacting the styrenic polymer composition with a molecular sieve, adding a nucleating agent, a foaming agent, and a coloring agent to the styrenic polymer composition, and forming an expanded styrenic polymer composition having a residual styrene monomer amount of less than 100 ppm.

Abstract: Solid polymeric materials for detection, transfer, amplification and memory of chirality of optically active compounds are described. These materials not only are able to absorb also traces of volatile organic compounds (both chiral and achiral) prevailingly as guest of a nanoporous crystalline phase, but for the case of chiral guests are also able to transfer and amplify their chirality, producing intense phenomena of induced circular dichroism (ICD). This induced dichroism remains stable also after chiral guest removal, as well as after temperature increases at least up to 250° C. The solid polymeric materials of the present invention can find applications in sensorics of optically active molecules as well as in systems for storage of data.

Abstract: Provided are compositions, processes for making, and processes for using triglycerides as plasticizers. Triglyceride plasticizers can be produced by recovery of linear or branched C4 to C10 aldehydes from a hydroformylation product, oxidation to the acid with oxygen and/or air, recovery of the resulting acid, and esterification with glycerol, wherein the total carbon number of the triester groups is from 20 to 25 for greater than or equal to 45 wt % of the plasticizer. Such plasticizers can be phthalate-free and provide outstanding properties including a suitable melting or glass transition or pour point, low volatility, increased compatibility, and excellent low temperature properties in a range of polymeric resins.

Abstract: The invention is directed to polyurethane foams which are flotation resistant with sufficient strength and density to provide stability and inhibit erosion at pipeline trench sites, and other uses, wherein at least 50% of the foam is open cell and has a density of approximately 1.3 lbs/ft3 to 3.5 lbs/ft3.

Abstract: A cannister-based, high solids, low and non-VOC aerosol adhesive and canister based system. The aerosol adhesive typically includes a high solids polymeric base, a hexane or cyclohexane and acetone solvent mixture and a compressed gas dissolved within the solvent. The compressed gas typically includes carbon dioxide, nitrogen, nitrous oxide and air. The aerosol adhesive is adapted to be filled into a cannister including a hose connected to the canister and a spray gun connected to the hose. The system typically includes high solids with a high viscosity. Thus the canister typically maintains high pressures up to 350 psi, but typically at 260 psi while maintaining 325 psi at 130° F., to deliver effective spray patterns.

Abstract: A thermoplastic elastomer foaming material is provided. The thermoplastic elastomer foaming material includes a hydrogenated styrenic/conjugated diene copolymer in a range from 5 to 35 weight percent; at least one of an acetate copolymer and an acrylate copolymer in a range from 3 to 30 weight percent; an amorphous polyolefin in a range from 20 to 60 weight percent; and a plasticizer in a range from 10 to 40 weight percent.

Abstract: A blowing agent for thermosetting foams is disclosed. The blowing agent is the hydrofluoropropene HFO-1243zf in combination with a hydrochlorofluoroolefin (HCFO) selected from HCFO-1233zd, HCFO-1233xf and HCFO-1223. The blowing agent is effective as a blowing agent in the manufacture of thermosetting foams.

Abstract: A polytetrafluoroethylene porous body which is produced by molding a polytetrafluoroethylene mixture, including a polytetrafluoroethylene powder and a pore-forming agent, into a predetermined shape, and subsequently removing the pore-forming agent. The pore-forming agent includes (a) one or more powders selected from a group consisting of dicarboxylic acid powders and benzoic acid powders, and (b) an organic solvent.

Abstract: A foamed starch-polyester graft copolymer and chemically modified starch-polyester graft copolymer composition comprising a chemically modified starch or chemically modified starch-nanoclay product is described. The composition can be produced continuously in a twin-screw co-rotating extruder in the presence of a blowing agent. The foams are biodegradable.

Abstract: The subject is to provide a polymer material which enables to improve planarity and planarization efficiency of a polished surface and is useful as a polishing pad which generates only a few scratches. The said subject is solved by a polymer material having a tensile modulus at 50° C. after saturation swelling with 50° C. water of 130 to 800 MPa, a loss tangent at 50° C. of not more than 0.2, and a contact angle with water of not more than 80°.

Abstract: This invention relates to foam insulating products, particularly extruded polystyrene foam, containing multi-layered nano-graphite as a process additive for improving the physical properties of foam products.

Abstract: A composition used for preparing foaming material comprising a polyhydroxyalkanoate, a polylactic acid and a foaming agent, which posses certain tensile strength, elongation in break and expansion ratio as well as full bio-degradability, thus can be used in packaging industry.

Abstract: Natural oil based halogenated compounds that are useful as flame retardants for polymeric materials, such as polyurethanes. Novel compositions of matter, novel processes for preparing such compositions of matter, and end use applications of the novel compositions of matter. The process comprises the reaction of natural oil hydroxylates with halogenated reactive materials such as halogenated anhydrides of organic acids or their esters in the presence of a titanium catalyst.

Abstract: An object of the invention is to provide a polyolefin resin foam which is excellent in flexibility, cushioning property and processability, especially excellent in cutting processability. The present invention relates to a polyolefin resin foam obtained by foaming a polyolefin resin composition using carbon dioxide in a supercritical state, wherein the polyolefin resin composition contains at least: (1) a thermoplastic elastomer composition obtained by subjecting to a dynamically heat treatment a mixture of (A) a rubber, and (B) (B-1) an ?-olefin crystalline thermoplastic resin and/or (B-2) an ?-olefin amorphous thermoplastic resin, each having a melt tension of less than 3.0 cN at a temperature of 210° C. and at a take-up speed of 2.0 m/min, in the presence of (C) a crosslinking agent; (2) a polyolefin resin; and (3) a nucleant agent having an average particle diameter of from 0.1 ?m to less than 2.0 ?m. The polyolefin resin foam has a density, for example, of 0.2 g/cm2 or less.

Abstract: Extruded polymer foams are prepared using brominated fatty acids, an ester, amide or ester-amide of a brominated fatty acid, a glyceride of one or more brominated fatty acids, or a polymerized brominated fatty acid as an FR additive. The brominated FR additives unexpectedly are stable at the extrusion temperatures, and provide excellent flame retardancy to the foams.

Abstract: Foamable, isocyanate-functional organopolysiloxanes with more uniform molecular weights are produced by reaction of an aminoalkyl or hydroxyalkyl functional organopolysiloxane with a stoichiometric excess of a di- or polysiocyanate in the presence of a compatibilizer which provides a homogenous reaction mixture.

Abstract: Disclosed are an absorbent and antibacterial polystyrene paper, a method for producing thereof, and an absorbent and antibacterial tray using the same. The absorbent and antibacterial polystyrene paper according to the present invention may be useful to absorb into a paper liquids, such as blood, moisture and the like, which is generated from foods in packing the foods such as meats, fishes, etc., by adding an antistatic agent to polystyrene raw materials and foaming the resultant mixture to produce absorbent and antibacterial polystyrene paper and tray, wherein a plurality of absorption holes are formed on one surface thereof. Here, the absorbent and antibacterial polystyrene paper according to the present invention is produced by mixing, foaming and extrusion-melting 91 to 95% by weight of polystyrene, 2 to 4% by weight of a nucleating material master batch and 3 to 5% by weight of an antistatic agent master batch, wherein a plurality of absorption holes are formed on a surface of a molded sheet.

Abstract: The invention pertains to a process for producing a cross-linked polyolefin foam in a continuous process using standard processing equipment without using a moisture cross-linking step after processing. In this method, a vinyl functional silane compound is melt grafted onto a low density polyethylene in the presence of a free radical generator. The resulting silane grafted polyethylene resin is mixed and melted with a blowing agent in a continuous process in the presence of water to form a vinyl functional silane foam.

Abstract: Foamed film compositions using chemical blowing agents and produced by continuous blown film extrusion or cast film extrusion of polymer foams. The composition has small cell size and is suitable for the production of thin film articles. The articles may be monolayer or multilayered structures.

Abstract: Blended polyolefin dispersions, including: (A) a liquid; (B) an olefin-based polymer dispersed in the liquid, the dispersed olefin-based polymer having an average particle size ranging from 0.1 to 5 microns; and (C) an alpha-beta unsaturated carboxylic acid-based polymer dispersed in the liquid, the dispersed alpha-beta unsaturated carboxylic acid-based polymer having an average particle size ranging from 0.02 microns to 1 micron. Coatings, froths, foams, toners, and other various uses for the blended dispersions are also disclosed.

Abstract: The invention provides a process for the production of a 5 crosslinked polymer foam, which comprises the following steps: (I) blending a polymer with a blowing agent, (II) forming the blend into a sheet, (III) crosslinking the sheet, and (IV) foaming the sheet, wherein the blowing agent is blended in an amount of 3 to 25 based on the total weight of the polyolefin and the blowing agent, and is composed of (A) 3 to 50% of one or more inorganic carbonates and (B) 50 to 97 of one or more compounds selected from the group consisting of polycarboxylic acids, salts thereof, and derivatives thereof.

Abstract: Polymer molding processes, such as injection-molding processes, include use of a viscosity-reducing supercritical fluid additive resulting in less breakage of reinforcing fibers upon introduction into the mold.

Abstract: A constrained layer damping structure is provided, including a panel to be damped, a constraining layer and a layer of foam vibration damping material sandwiched therebetween. In one embodiment, the foam vibration damping material is provided from a composition including 5-50 weight percent polyvinyl butyral, 2-20 weight percent plasticizer, 25-65 weight percent filler, 1-15 weight percent tackifier, and 0.1-8 weight percent blowing agent, wherein the composition includes 15-65 weight percent total thermoplastic inclusive of polyvinyl butyral. In a further embodiment, the polyvinyl butyral is provided as recycled material from recycled auto glass, and includes a small quantity of plasticizer, typically but not necessarily of the phthalate-type or hexanoate-type.

Abstract: A blowing agent blend for making thermoplastic polymer foams comprises methyl formate. The blowing agent blend can further comprise at least one co-blowing agent. The co-blowing agent is either a physical co-blowing agent (e.g. an inorganic agent, a hydrocarbon, a halogenated hydrocarbon, a hydrocarbon with polar, functional group(s), water or any combination thereof), or a chemical co-blowing agent, or combinations thereof. The thermoplastic polymer foam can be an alkenyl aromatic polymer foam, e.g. a polystyrene foam. The blowing agent blend can comprise 100 mol % methyl formate, or it can comprise any combination of methyl formate and one or more co-blowing agents. The methyl formate-based blowing agent blends produce stable foams. A process for the preparation of such foams is also provided.

Abstract: The foam sheet of the present invention is biodegradable, can be recycled, has good processability, is lightweight, exhibits excellent appearance, has practically satisfactory heat resistance and is more acceptable to the environment. There is provided a crosslinked biodegradable resin continuous foam sheet comprising biodegradable resin, and has an expansion rate of about 1.5 to about 50 and a gel fraction of about 3% or more. There is further provided a method for producing the foam sheet comprising the steps of: (1) preparing a sheet from a resin composition comprising a biodegradable resin, a thermal decomposable blowing agent, and a crosslinking promoter; (2) irradiating the resulting sheet with an ionizing radiation to crosslink the resin composition; and (3) subjecting the crosslinked sheet to heat treatment to continuously prepare a crosslinked foam sheet.

Abstract: Liquid, injectable, aqueous solutions are transformed in situ to an expandable foam-like, space filling, and adherent biomaterial. Preferably, the foam-like biomaterial is the reaction product of a two-part liquid system to achieve the in situ formation thereof. The liquid system is generally comprised of a protein solution and a cross linker solution which may either be premixed and then applied to a site in need of the biomaterial, or simultaneously mixed and delivered through an in-line mixing/dispensing tip directly to the site. In especially preferred embodiments, an expandable foam-like biomaterial includes the reaction product of human or animal-derived protein material and a di- or polyaldehyde in the presence of a bicarbonate and an acidic titrant amounts sufficient to impart a cellular foam structure to the material.

Abstract: The present invention provides a foam cushion, a method of making the foam cushion, and a method of using the foam cushion. The foam cushion is formed from: (a) at least one of rubber and a resin; (b) a blowing agent; (c) a polymeric adhesion modifier; (d) a decomposition accelerating agent, and (e) a cross-linking agent.

Abstract: A compound permitting the economic production of packaging containers, which when activated produces concentrated amounts of CO2 gas for extended periods for preservation of perishable products therein, comprises a mixture including a CO2 generating portion incorporated within a polymer matrix. Preferably, the mixture includes citric acid; calcium carbonate, and polyethylene resin. More preferably, the mixture includes a mixture of a carboxylic acid (0.1–40%); a hydrogen carbonate (0.1–40%) and any polyolefin resin. Even more preferably, the mixture includes a mixture including (0.01–40%) Citric Acid; (0.01–40%); and 30–75% polyethylene resin. Most preferably, the mixture includes by weight 12% citric acid; 38% calcium carbonate; and 50% low density polyethylene resin with a melt index of 20 and a density of 0.924 g/cc. Alternatively, the carboxylic acid and hydrogen carbonate components are compounded into separate polymer matrixes, and later combined.

Abstract: Polymeric structures produced with a controlled number and distribution of small, closed cells. The polymeric structures are characterized by an opaque, whitening appearance attributed, at least in part, to the distribution of closed cells and thus, at least in part, to light scattering resulting from the distribution of small, closed cells or voids. The light scattering thus provides an enhanced whitening effect. The whitening effect may be uniform or non-uniform along the length and width of the structure.

Abstract: Devices and processes (e.g., improved Plasticized Melt Flow processes (PMF) or improved Phase Separation Polymer Concentration (PSPC), etc.) used to make resorbable and non-resorbable structures for treating and/or healing of tissue defects are disclosed. Among the advantages of using these improved processes are the preservation of molecular weight and the broadening of the processing conditions for temperature sensitive polymers and therapies This reduction in processing temperature, pressure and time can help to preserve the molecular weight and/or integrity of the final product or any additive incorporated therein. The present invention relates to an improved porous implant wherein the pores of the implant present a second modeling material on their surfaces. This second material provides a textured or roughened face to the internal surfaces of pores.

Abstract: Supercritical fluid-assisted deposition of materials on substrates, such as semiconductor substrates for integrated circuit device manufacture. The deposition is effected using a supercritical fluid-based composition containing the precursor(s) of the material to be deposited on the substrate surface. Such approach permits use of precursors that otherwise would be wholly unsuitable for deposition applications, as lacking requisite volatility and transport characteristics for vapor phase deposition processes.

Abstract: The invention relates to a composition which can be foamed from pressurized containers. Said composition is based on an aqueous plastic dispersion containing an aqueous dispersion of at least one film-forming plastic material consisting of 30% to 80% by weight of a film-forming plastic material, a propellant gas amounting between 3% to 25% by weight in relation to the entire composition and one or more ionic foam stabilizers amounting between 0.3 and 6% by weight in relation to the entire composition. The foamed compositions can he used as scaling, damping and insulating materials.

Abstract: A process for producing thermo-expansive microcapsules wherein a polymerizing mixture containing ethylenic unsaturated monomer and a blowing agent is suspend-polymerized to microencapsulate the blowing agent with the resultant polymer. The above-mentioned suspension-polymerization is performed with the presence of at least one compound selected from the group consisting of polypeptides and derivatives thereof as a suspension stabilizer. The process can control the particle size of microcapsules easily, attain stable reaction system and produce thermo-expansive microcapsules that disperse well in medium such as paint or inks.

Abstract: Methods of carrying out a reactive extrusion processes are described that include combining at least one polymer, oligomer, or combination thereof, a carbon dioxide containing fluid, and at least one reactant in an extruder to form a mixture such that the carbon dioxide containing fluid comes into intimate contact with the at least one polymer, oligomer, or combination thereof and assists in a reaction between the at least one polymer, oligomer, or combination thereof and the at least one reactant, and wherein the at least one polymer, oligomer, or combination thereof is modified upon reaction with the at least one reactant.

Abstract: A two-component foam-in-place structural material for producing a foamed product. The first component of the system includes an epoxy-based resin preferably formulated with a physical blowing agent particulate material. The physical blowing agent core is encapsulated within a shell or skin that will change state. The second component is an acid that is capable of initiating polymerization of the resin. A reactive mixture is achieved through the combination of the first and second components wherein heat from the exothermic reaction of the epoxy component caused by the acid in turn causes the thermoplastic shell having a solvent core to soften and increase in size due to gas pressure and change in state of the shell thereby foaming the reactive mixture.

Abstract: A foam formed from ethylene/vinyl acetate copolymer having a melt index of greater than 1 gram/10 minutes and a vinyl acetate content ranging from about 5 to about 25 weight percent.

Abstract: An extruded thin sheet foam is disclosed prepared from a polyolefin resin in which the blowing agent comprises a blend of from about 1 to 25% by weight of carbon dioxide and the balance of C3 to C4 VOCs. Thin foam sheets produced with the blowing agent age about twice as fast as foams prepared with VOCs, are remarkably stable, and can be produced at high throughputs.