Abstract: Formulations of polyvinyl chloride blended with nitrile rubber are provided. These formulations have been found to be useful in floor cleaning units, and provide a cost savings benefit, while meeting the physical and chemical property demands for the floor cleaning unit parts into which they are formed.

Abstract: A method of producing a foamed material comprises contacting a mixture comprising a first thermoplastic polymer and a second thermoplastic polymer with a blowing agent, wherein the first thermoplastic polymer has a higher percent crystallinity that the second thermoplastic polymer; and subjecting the mixture to conditions sufficient to create a thermodynamic instability in the blend foam the mixture, wherein the mixture comprising the first and second thermoplastic polymers has a percent crystallinity lower than the first thermoplastic polymer.

Abstract: The present invention is an ABS foam composition. The composition is comprised of ABS, a foam modifier, and a blowing agent. The composition may be formed into a variety of shapes and products using many different processing techniques, e.g., extrusion and molding.

Abstract: Foamable modified polystyrene resin particles which are foamable modified polystyrene resin particles (d) comprising modified polystyrene resin particles (c) containing a blowing agent (e); the modified polystyrene resin particles (c) comprising a polystyrene resin and rubber polymer particles (b) being dispersed in the resin, wherein the rubber polymer particles (b) are dispersed uniformly throughout a continuous phase of the polystyrene resin or in a state of a density of the particles (b) being higher in a center portion of the resin particle than in a surface layer portion thereof, and the modified polystyrene resin particles (c) are modified polystyrene resin particles prepared by impregnating a monomer mixture consisting essentially of a styrene monomer and a conjugated diene monomer and comprising the styrene monomer in a larger amount than the conjugated diene monomer, into polystyrene resin particles (a) and carrying out copolymerization.

Abstract: A prepolymer composition for producing polyurethane insulating foams with fire-retardant properties from pressure tanks which consists of a prepolymer component with at least one PU prepolymer with a content of NCO groups of 4 to 20 wt % and usual additives, as well as a propellant component, wherein the prepolymer component is substantially halogenfree and has 5 to 40 wt %, based on the prepolymer component, of softening phosphates and/or phosphonates with the formulae O═P(OR3 and O═P(OR)2R.

Abstract: The elastomeric composition for preparing an olefinic elastomer crosslinked foam according to the present invention contains an ethylene/&agr;-olefin copolymer (A) having a specific density and MFR, an organic peroxide (D), a crosslinking assistant (E), a foaming agent (F), an organic metal compound (G), and as necessary, a high pressure low density polyethylene (B) having a specific MFR, and an ethylene/vinyl acetate copolymer (C) having a specific amount of vinyl acetate and a specific MFR. An olefinic elastomer crosslinked foam of the present invention can be obtained by crosslinking and foaming the above composition. Further, another olefinic elastomer crosslinked foam of the present invention can be obtained by a secondary compression of the above crosslinked foam. The footwear part of the present invention is made of these crosslinked foams.

Abstract: There is provided vulcanized solid rubber, which comprises a vulcanized product of an oil-extended copolymer comprising: (i) 100 parts by weight of an ethylene-&agr;-olefin-non-conjugated diene copolymer satisfying the following requirements (1) to (4), and (ii) 10 to 90 parts by weight of an extender oil: (1) a weight ratio of an ethylene unit to an &agr;-olefin unit in the ethylene-&agr;-olefin-non-conjugated diene copolymer is from 73/27 to 40/60, (2) an iodine value of the ethylene-&agr;-olefin-non-conjugated diene copolymer is from 20 to 36, (3) Mooney viscosity (ML1+4 (121° C.)) measured according to JIS-K-6300 of a blend containing 100 parts by weight of the ethylene-&agr;-olefin-non-conjugated diene copolymer and 20 parts by weight of an extender oil is from 100 to 180, and (4) a ratio of weight average molecular chain length/number average molecular chain length measured by gel permeation chromatography of the ethylene-&agr;-olefin-non-conjugated diene copolymer is from 3 to 5.

Abstract: A flexible thermoplastic article is formed from a blend comprising from about 2 to about 15 weight percent of a styrene-elastomer block copolymer; from about 60 to about 90 weight percent polyolefin; from about 4 to about 15 weight percent plasticizer oil, and optionally from about 0 to about 3 weight percent of at least one additive. The additives are typically present in a concentration of from 0.05 to about 3 weigh percent and can include those additives conventionally used in polyolefin foam compositions, including antioxidants and stabilizers, processing aids, etc. The styrene-elastomer block copolymer is preferably a tri-block copolymer structure which includes styrene end-blocks and a mid-block of a saturated olefin elastomer. A particularly suitable styrene elastomer block copolymer is a styrene-ethylene/butylene-styrene (SEBS) block copolymer.

Abstract: A foamable polymer composition is described which comprises: a1) a substantially random interpolymer produced from: i) one or more &agr;-olefin monomers; and ii) one or more vinyl or vinylidene aromatic monomers and/or one or more sterically hindered aliphatic or cycloaliphiatic vinyl or vinylidene monomers; and optionally iii) other polymerizable ethylenically unsaturated monomer(s); or a2) an interpolymer comprising polymerized units of ethylene and vinyl acetate; or a3) a combination of the polymers a1) and a2); and b) a polydiorgainosiloxanic having a viscosity of at least one million centistoke at 25° C.; and c) a foaming agent. The polydiorganosiloxane is useful for improving the abrasion resistance of foams comprising the substantially random interpolymer a1) and/or the ethylene/vinyl acetate interpolymer a2).

Abstract: The ethylenic copolymer rubber according to the present invention is a novel and useful ethylenic copolymer rubber which can be cross-linked at a high velocity and is superior in scorching stability, in workability and in moldability, of which cross-linked product is superior in the mechanical properties, such as the cross-linked rubber strength etc., and in the form-preservability. A cross-linkable rubber composition containing this ethylenic copolymer rubber is utilized for producing, for example, cross-linked molded rubber product for use as sealing element and automobile weather strip sponge.

Abstract: A method of forming, by polymerization in an aqueous dispersion at pressures in excess of one atmosphere, a plurality of porous particles having at least one polymeric phase and, additionally, having a pore filling phase containing a fugitive substance is disclosed. Replacement of the fugitive substance with a gas is further disclosed. Gas-filled porous particles and their aqueous dispersions are also disclosed.

Abstract: Microcellular thermoplastic elastomeric polymeric structures are provided. The articles have an average cell size of less than 100 &mgr;m and a compression set ranging from less than about 30% to less than about 5%, and a rebound value of at least 50%. The articles may be formed from a thermoplastic elastomeric olefin, preferably metallocene-catalyzed polyethylene. The density of the articles ranges from less than 0.5 gm/cm3 to less than 0.3 gm/cm3.

Abstract: An ethylene propylene rubber foam which comprises as the crude rubber, an ethylene propylene rubber having an iodine value of 35 to 45 and a Mooney viscosity ML1+4 at 100° C. of 20 to 50, and which has less compression set and is suitable as a material for a transfer member, a primary transfer member, a secondary transfer member, a cleaning member for image formation bodies, a bias member, a backup member, etc.; an electroconductive ethylene propylene rubber foam which comprises as the crude rubber, an ethylene propylene rubber having an iodine value of 35 to 45 and a Mooney viscosity ML1+4 at 100° C.

Abstract: The present invention provides a thermoplastic resin structure which has a three-layer structure of flexible skin layer/flexible foamed material layer/hard substrate layer wherein each of the layers comprises a thermoplastic resin capable of melt-adhesion with each other, and the flexible foamed material layer is formed by the injection foam molding method. The resin structure exhibits the capability of being easily recycled and, at the same time, can be produced at a low cost, which has not been achieved by a conventional structure using a cross-linked foamed sheet or a urethane foam, while maintaining the performance in appearance, cushioning, rigidity and the like, and thus markedly useful for application fields requiring high performance in cushioning, sound absorption, heat insulation and the like in automobiles, household electrical appliances, general industrial parts and the like.

Abstract: The invention discloses methods for making foams by photopolymerizing emulsions comprising a reactive phase and a phase immiscible with the reactive phase components. Foams made from water-in-oil emulsions, including high internal phase emulsion are disclosed. Articles and uses for the foams are also described.

Abstract: A laminate comprising a pair of thermoplastic resin members having fluctuation of clearance between the adhesion surfaces thereof, and a thermoplastic material foam layer which adheres the pair of the thermoplastic resin members. This laminate is formed from thermoplastic resin as a whole and can absorb the fluctuation of clearance between the members, and the thermoplastic resin members are firmly adhered with the thermoplastic material foam layer.

Abstract: Foamed thermoplastic polyolefin elastomer is formed by heating a foamable thermoplastic polyolefin elastomer-containing polymeric composition containing each of a first water-releasing blowing agent which is at least one of metal hydroxide and water hydrate of a salt of a metal of Group 1 or Group 2 of the Periodic Table and a second blowing agent which is neither a metal hydroxide nor a water hydrate of a salt of a metal of Group 1 or Group 2 of the Periodic Table, to a temperature above the melting point of the polyolefin elastomer. The second blowing agent may be a chemical blowing agent and may release, water, a mixture of water and carbon dioxide or another gas, including carbon monoxide, carbon dioxide, and nitrogen.

Abstract: A vibration damping, resinous, open cell cellular body is disclosed. The body has a base material thereof which consists essentially of a mixture of a tri-block copolymer as a combination of polystyrene and vinyl-polyisoprene and an ethylene series resin. In a method of manufacture, the mixture is blended and kneaded with a foaming agent and a crosslinking agent to form a foamable and crosslinkable composition. The composition is heated in a non-airtight mold to foam, thereby forming a cellular body with cells therein. The cellular body is then mechanically deformed to cause cells therein to be interconnected, thereby producing the open cell cellular body.

Abstract: An expandable composition comprising: (A) about 60 to about 98 percent by weight of a polyolefin or mixture of polyolefins wherein the polyolefin or mixture has an &eegr;0 of less than about 9.0 kilopascal.seconds (kPa.s), a Jr greater than about 50×10−5/pascals (Pa), and an Ea greater than about 6.7 kilocalories per mole (kcal/mol); and (B) about 2 to about 40 percent by weight of a polyolefin or mixture of polyolefins having an nRSI greater than about 4.5, and no greater than about 19; or (C) a polyolefin or mixture of polyolefins wherein the polymer or mixture has an &eegr;0 of less than about 9.0 kilopascal.seconds, a Jr greater than about 50×10−5/pascals, an Ea greater than about 6.7 kilocalories/mole, and an nRSI greater than about 9.

Abstract: A two part system for producing structural reinforcing adhesives is provided wherein one component containing epoxy resin is combined with a second component containing a specified curative system. An aliphatic polyamine, an amidoamine, an alcohol and an adduct of a polyamine and an epoxide are present in the curative system. When a thermally activated blowing agent is utilized, the resulting foam is remarkably uniform in cell structure and has improved strength and modulus. Hollow inorganic microspheres are employed to reduce the density of the thermoset produced from the two part system.

Abstract: A foam and pre-foam production process, and a foam and a pre-foam is described. The process comprises the steps of: forming a pre-foam composition comprising oil(s), thermoplastic elastomer(s) and heat expandable thermoplastic particles encapsulating heat expandable gas or liquified gas, the said particles being present in an amount which provides the required foam cell density. A heat treating step for the said composition to cause the particles to expand and produce a foam from the said composition is also described.

Abstract: A low-temperature foam compositions and that are produced from an epoxy compound and an acid source can be substantially free of polyurethane or isocyanate chemistry. The disclosed compositions and precursors thereof reduce, if not eliminate, the presence of conventional undesirable compounds and by-products thereof.

Abstract: A polymeric roofing shingle composition is shown which includes (a) a rubber component present in the range from about 10-95% by weight, based on the total weight of the composition and (b) a polyolefin component present in the range from about 5-50% by weight, based on the total weight of the composition. A SBR/EVA closed cell rubber composition can be formulated which has a weight of less than 150 pounds per roofing square for ⅛ inch thickness and which is flame retardant at thicknesses of ⅛ inch and higher without the addition of separate flame retardant components.

Abstract: An oil-extended copolymer for sponge comprising an ethylene-&agr;-olefin nonconjugated diene copolymer satisfying the following conditions (1) to (4), and an extender oil in an amount of 10 to 90 parts by weight based on 100 parts by weight of said copolymer. (1) a weight ratio of ethylene/&agr;-olefin of 73/27 to 40/60, (2) an iodine value of 20 to 36 which represents a non-conjugated diene content, (3) a Mooney viscosity (ML 1+4 (121° C.) in Mooney viscosity according to JIS-K-6300) of 100 to 180 as measured for a mixture formed by compounding 20 parts by weight of an extender oil based on 100 parts by weight of said copolymer, and (4) a Q-value (a weight average of molecular chain/number average of molecular chain) of 3 to 5 as measured by gel-permeation chromatography (GPC) of said copolymer.

Abstract: A thermoplastic elastomer composition powder obtained by blending 0.1 to 5 parts by weight of (c) described below per 100 part by weight of a pulverized product of a thermoplastic elastomer composition comprising 10 to 250 parts by weight of (b) described below or 10 to 250 parts by weight of (b) and 0.01 to 10 parts by weight of (d) described below per 100 parts by weight of (a) described below, and having a complex dynamic viscosity &eegr;* (1) of 1.5×105 poise or less and a Newtonian viscosity index n of 0.67 or less, and a powder molding process and molded article using said powder, (a): a polyolefin-based resin, (b): a rubbery polymer imparting a new single tan &dgr; peak at a temperature different from that of the tan &dgr; peak of (a) and that of the tan &dgr; peak of (b) within the range of −70 to 30° C.

Abstract: A foamed closure for a container, wherein the closure consists essentially of (a) a major proportion of at least one material selected from the group consisting of polyethylene and copolymers of ethylene; and (b) a minor proportion of at least one resilient compound. The resilient compound is preferably selected from the group consisting of polyethylene, metallocene catalyzed polyolefins, ethylene vinyl acetate copolymers, styrene-butadiene-styrene copolymers or styrene-ethylene-butylene-styrene copolymers.

Abstract: A tapered stepped land having a choked funnel section which terminates in a lateral longitudinal section results in the formation of a foamed extrudate of a vulcanized blend of polyolefin and rubber which is a mass of closed cells having a specific gravity in the range from about 0.1 to 0.5 and the cells are sheathed in a dense non-porous, smoothly continuous skin which is formed integrally with the extrudate. The dense skin makes it possible to deposit a thin slip-coating of a low friction material longitudinally upon a chosen portion of the surface. An extruded weatherseal for the glass of an automobile's window has the slip-coating deposited as a thin film on a contacting strip of a surface which is in contact with the glass.

Abstract: A sheet, film, fiber, foam or latex prepared from a blend of polymeric materials comprising a plurality of substantially random interpolymers comprising vinyl aromatic and ethylene and/or alpha olefin monomers and wherein: a) the amount of polymer units derived from said vinyl aromatic monomer in any interpolymer component differs from that amount in another interpolymer component by at least 0.5 mole percent; b) the amount of polymer units derived from said vinyl aromatic monomer in the blend is greater than about 19 mole percent; and wherein c) the observed stress relaxation of the resulting blend is greater than the additive stress relaxation of the of the individual blend components.

Abstract: A polymeric closure for a container comprising a foamed polyethylene, wherein said polyethylene prior to foaming has: 1) a density of between 0.910 g/cm3 and 0.885 g/cm3; ii) a molecular weight distribution of 2 or less; and iii) a melt index of between 2 and 10. Closure can be used as a replacement of natural cork for wine bottles.

Abstract: The invention relates to a thermoplastic material made from (a) recycled rubber particles, (b) expandable microspheres and (c) a thermoplastic resin other than (b) or (c).

Abstract: This invention provides a thermoplastic polymer foam having a density of up to 800 kg/m3. The foam is made from a hydrogenated vinyl aromatic polymer that contains pendant cycloaliphatic groups. This polymer is conveniently made by hydrogenating a poly(vinyl aromatic) polymer such as polystyrene or a polystyrene-butadiene block copolymer. A suitable blowing agent is a mixture comprising (a) one or more fluorine-containing carbon compounds and (b) carbon dioxide, nitrogen, an alcohol having from 1 to 4 carbon atoms, a linear or cyclic hydrocarbon having from 1 to 6 carbon atoms, a ketone, an alkyl ether, an alkyl halide, water or a mixture thereof.

Abstract: A superporous hydrogel composite is formed by polymerizing one or more ethylenically-unsaturated monomers, and a multiolefinic crosslinking agent, in the presence of particles of a disintegrant and a blowing agent. The disintegrant, which rapidly absorbs water, serves to greatly increase the mechanical strength of the superporous hydrogel and significantly shorten the time required to absorb water and swell. Superporous hydrogel composites prepared by this method have an average pore size in the range of 10 &mgr;m to 3,000 &mgr;m. Preferred particles of disintegrant include natural and synthetic charged polymers, such as crosslinked sodium carboxymethylcellulose, crosslinked sodium starch glycolate, and crosslinked polyvinylpyrrolidone. The blowing agent is preferably a compound that releases gas bubbles upon acidification, such as NaHCO3. Improved hydrogel composites formed without a blowing agent are also provided.

Abstract: Polymer articles including ethylene-vinyl acetate and maleic anhydride are described. The ethylene-vinyl acetate can be a high vinyl acetate content ethylene-vinyl acetate. The articles include foamed articles and non-foamed articles. The foamed articles have improved characteristics and properties, such as surface bonding properties.

Abstract: There is provided a foamed article having a low density, large thickness, a high closed cell ratio and a small average cell diameter. A foamed extrusion article having a density of 50 to 10 kg/m3 and a closed cell ratio of at least 40% is obtained by mixing a mixed resin comprising (a) 50 to 95 parts by weight of a polypropylene resin having a melt tension at 230° C. of at least 0.05 N, (b) 50 to 5 parts by weight of a polystyrene resin, and (c) 0.5 to 15.0 parts by weight of a hydrogenated block copolymer of styrene, isoprene and styrene based on 100 parts by weight of the polypropylene resin (a) and the polystyrene resin (b) with a foaming agent in an extruder, and then releasing into a low-pressure zone.

Abstract: The invention relates to a process for preparing a foamed thermoplastic elastomeric article,comprising the following steps: heating a mixture comprising a thermoplastic elastomer selected from the group comprising styrene based thermoplastic elastomers and thermoplastic polyolefin elastomers, and an effective amount of a water releasing chemical compound, to a temperature at which the water releasing chemical compound releases water, which is above the melting point of the thermoplastic elastomer, and releasing the resulting heated mixture to atmospheric conditions. The invention also relates to a foamable polymeric composition as well as to a foamed thermoplastic elastomeric article.

Abstract: The present invention relates to foams comprising cycloolefin copolymers. The foam of the invention comprises at least one cycloolefin copolymer which comprises from 0.1 to 100% by weight, based on the total mass of the cycloolefin copolymer, of polymerized units derived from one or more polycyclic olefins having one or more norbornene units and from 0 to 99% by weight, based on the total mass of the cycloolefin copolymer, of polymerized units derived from one or more acyclic olefins of the formula  where Ri, Rii, Riii and Riv are identical or different and are each a hydrogen atom, a linear, branched, saturated or unsaturated C1-C20-hydrocarbon radical or a C6-C18-aryl radical and from 0 to 99% by weight, based on the total mass of the cycloolefin copolymer, of polymerized units of one or more monocyclic olefins of the formula VIII  where n is a number from 2 to 10, and voids which can contain one or more gaseous substances.

Abstract: A process for producing static-free synthetic rubber includes mixing acrylonitrile-butadiene, Anti-static agent, Activated zinc oxide, Zinc stearate, HI-sil (EPDM), Plasticizer, and Stearic Acid prior to a kneading process at 140 degrees Celsius for 8 to 12 minutes. (DCP) Peroxides and Blowing agents are added to the kneeing mixture two minutes before the end of the kneeding process. After the kneeding process, the resultant mixture is fed through rollers to form a sheet of the synthetic rubber. The sheet is then cut into appropriately-sized pieces and put into a mold, where the pieces are subjected to high pressure and a temperature of 160 degrees Celsius. The pieces are then left to cool, and then be used for articles such as static-free footwear.

Abstract: Foamable modified polystyrene resin particles (E) comprising a particle of a modified polystyrene resin (C) containing a blowing agent (D), wherein the modified polystyrene resin (C) comprises conjugated diene polymer rubber particles (B) dispersed uniformly throughout a polystyrene resin (A) and when the foamable modified polystyrene resin particle (E) is expanded, there is substantially no deformation of the rubber particles (B) before and after the expansion. A foamed article of a modified polystyrene resin which has a cell membrane of the modified polystyrene resin comprising a polystyrene resin and conjugated diene polymer rubber particles dispersed uniformly throughout the polystyrene resin and has a fusion rate of not less than 50%, wherein the rubber particles maintain substantially spherical form in the cell membrane.

Abstract: Polymer articles including maleic anhydride are described. The articles have improved characteristics and properties, such as surface bonding properties, even when the article includes a large percentage of ethylene propylene diene monomer terpolymer, ethylene-vinyl acetate, ethylene-acrylic elastomers, reclaim, or an oil.

Abstract: A conductive elastomeric foam composite is presented, comprising an elastomer foam and polypyrrole, thiophene, or aniline and derivatives thereof. The foam is manufactured by first diffusing an oxidant into the dense polymer phase of a solvent-swollen foam and then diffusing pyrrole or pyrrole derivative vapor or solution into the dried foam, resulting in an in situ chemical oxidative polymerization of pyrrole at the oxidant site. Only about 5 wt % of conductive polymer is required for observing an insulator to conductor transition. The conductivity of the composite foam can be effectively controlled between 10−7 and 10−1 S/cm by varying either the amount of oxidant used and/or the copolymer composition.

Abstract: An open-cell polystyrene foam is provided which is formed from a blend of polystyrene and an ethylene-styrene interpolymer. The ethylene-styrene interpolymer functions as a cell opening agent, and is used to control the open cell content of the resulting foam, which may contain greater than 80 percent open cells. The foam is produced by an extrusion process in which carbon dioxide is used as the preferred blowing agent. The resulting foams may be formed into beads, plank, round, sheets, etc.

Abstract: The present invention relates to a pressure sensitive adhesive foam with a percentage of theoretical density less than 90, wherein the foam has a peel adhesion of greater than about 1 N/cm and a compression set under constant deflection of less than about 60%. The present invention further includes a pressure sensitive adhesive foam comprising a thermoplastic block copolymer, a tackifying resin; an isocyanate terminated monomer or oligomer; a polymer comprising a backbone selected from the group consisting of polybutadiene, polyester and polyether, wherein the polymer contains at least 2 active hydrogens capable of reacting with the isocyanate terminated monomer; and expandable particulate materials. The present invention further includes a pressure sensitive adhesive foam comprising a thermoplastic olefin polymer or copolymer, having a density less than 0.

Abstract: High internal phase emulsions (HIPEs), porous polymeric materials made therefrom, and methods for making and using the same. Specific embodiments of the invention include water-in-oil high internal phase emulsions having at least 70 volume percent of an internal aqueous phase and less than 30 volume percent of an external oil phase wherein the oil phase comprises a vinyl polymerizable monomer and a surfactant effective to stabilize the emulsion. The subject surfactants are oil soluble and preferably include an oxyalkylene component.

Abstract: A polyolefinic resin is combined with a (meth)acrylic polyfunctional monomer compound having an aromatic ring, an alicyclic ring or a heterocyclic ring nearly in the center of its chemical formula, and a pyrolyzable chemical foaming agent to give a curable and foamable polyolefinic resin composition. The composition is shaped into a sheet, then cured and foamed into a sheet foam. The cured foam of polyolefinic resin has a curing degree of from 10 to 70%, and has the advantages of good heat resistance, good workability and shapability, and good pressure resistance.

Abstract: A rubber composition for a tire tread comprising a foamed rubber composition prepared by blending 100 parts by weight of at least one rubber component selected from the group consisting of natural rubber and diene based synthetic rubbers with 1 to 40 parts by weight of a thermoplastic resin having a melting point of 120 to 130.degree. C., a density of 0.92 to 0.935 and a softening point of 80 to 110.degree. C., and a pneumatic tire using the above rubber composition for a tire tread part. The above thermoplastic resin is preferably a linear polyethylene or a modified linear polyethylene obtained by modifying a part of a linear polyethylene.

Abstract: A formed rubber extruded product which is formed of a vulcanizate of a rubber blend comprising a sulfur-vulcanizable ethylene-propylene-type rubber (EPDM) as a starting rubber and a pyrolytic foaming agent. The vulcanizate has a specific gravity of from 0.9 to 1.0 and a surface roughness (RZD) of 14 micrometers or less. The rubber blend contains the pyrolytic foaming agent in the form of an inorganic powder-supported foaming agent. A particle diameter of the inorganic powder in the inorganic powder-supported foaming agent is approximately 9 micrometers or less, and a particle diameter of the pyrolytic foaming agent is approximately 8 micrometers or less. Further, crystalline PE is contained in an amount of from 6 to 30 parts per 100 parts of EPDM. The foamed rubber extruded product of the present invention can be produced by the extrusion at a high rate.

Abstract: The present invention relates to a polymeric compound comprising(a) 100 parts by weight of a block copolymer comprising at least two external monovinyl aromatic hydrocarbon blocks and at least one internal hydrogenated conjugated diene block, wherein the total monovinyl aromatic hydrocarbon content is from 20 to 50% by weight and the total apparent molecular weight is from 140,000 g/mol to 400,000 g/mol;(b) 50 to 250 phr of a plasticiser;(c) 10 to 100 phr of a polybutene-1 polymer having a melt index at 2.16 kg/190.degree. C. of from 0.05 to 400;(d) a blowing agent.The present invention further relates to use of the compound for the preparation of foamed compounds; to a foaming process; to a masterbatch blend; to a foamed compound; and to articles containing the foamed compound.

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. The foam vibration damping material is provided from a composition including 1-20 weight percent elastomeric polymer, 20-60 weight percent thermoplastic polymer, 0.5-18 weight percent tackifier, 4-23 weight percent asphalt filler, 20-50 weight percent inorganic filler and 0.2-7 weight percent blowing agent.

Abstract: An open-cell polystyrene foam is provided which is formed from a blend of polystyrene and an ethylene-styrene interpolymer. The ethylene-styrene interpolymer functions as a cell opening agent, and is used to control the open cell content of the resulting foam, which may contain greater than 80 percent open cells. The foam is produced by an extrusion process in which carbon dioxide is used as the preferred blowing agent. The resulting foams may be formed into beads, plank, round, sheets, etc.

Abstract: A method for foaming or foam-coating components is used for foaming hollow cavities of double-walled or multiple-walled components or foam-coating component parts with decorative surfaces so as to improve haptic properties of component parts. A material is introduced or applied in an unfoamed state to be foamed through the use of microwave energy. In order to achieve high dielectric losses and to ensure that the heat effect is evently distributed and essentially restricted to the material to be foamed, the material is adjusted in a polar manner by addition of certain substances such as conductive soot. Reflecting agents are used to improve the distribution and effect of the microwaves. The method ensures fully foamed hollow cavities and foam layers of uniform thickness. A foamable material for foaming or foam-coating components is also provided.