Abstract: A new and useful nonaqueous liquid pigment dispersion is provided which is easy to handle and produces thorough and effective colorations within target media, particularly as compared to standard solid pigments or high-viscosity liquid pigment dispersions. More specifically, the present invention relates to liquid pigment dispersions possessing viscosities of at most 5,000 centipoise at standard temperature and pressure. Such a low viscosity is obtained through the addition of relatively low amounts of aprotic viscosity modifiers possessing dipole moments of at between about 1.0 and 5.0, alternatively measured in terms of a flash point between about −20° C. and 180°, such as, most preferably cyclic carbonates.

Abstract: Rigid polyurethane foams that can be produced at component volumes ratios of less than 4:1 are prepared from an isocyanate component that contains certain polyfunctional (meth)acrylate compounds. These isocyanate components are mixed with a polyol component to produce rigid foams. The foams are particularly suitable for foam-in-place applications, such as for reinforcing structural members of automobiles.

Abstract: Polyurethane foams are prepared by reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms reactive with isocyanate groups, by a process in which the polyisocyanates a) are aliphatic di- or polyisocyanates and the compounds having at least two hydrogen atoms reactive with isocyanate groups b) contain at least one acrylate polyol.

Abstract: Highly resilient polyurethane foams are prepared by reacting a) polyisocyanates with b) compounds having at least two hydrogen atoms reactive with isocyanate groups, by a process in which a mixture containing, based in each case on the weight of the mixture, b1) from 5 to 75% by weight of at least one polymer polyol and b2) from 25 to 95% by weight of a mixture containing, based in each case on the weight of the mixture b2), b2i) from 70 to 98% by weight of at least one polyether alcohol having a molecular weight of from 3 500 to 6 500 g/mol, a functionality of less than or equal to 3 and an ethylene oxide content of from 8 to 20% by weight, based on the weight of the polyether alcohol, and b2ii) from 2 to 30% by weight of at least one polyether alcohol having a molecular weight of from greater than 4 000 to 7 000 g/mol, a functionality of from 4 to 8 and an ethylene oxide content of from 5 to 15% by weight, based on the weight of the polyether alcohol, is used as compounds b) having two hydrogen atom

Abstract: The present invention is a polyurethane foam comprising the reaction product of a first reactant comprised of a polyisocyanate having an average isocyanate functionality of at least 2 and a second reactant comprised of a low molecular weight compound that has at least two to, at most, three groups containing an active hydrogen and water, wherein the reaction product is formed essentially in the absence of a cross-linking polyol and the polyurethane foam is substantially rigid. The invention is also a method of forming the polyurethane foam by contacting the first and second reactant for a time and temperature sufficient to form the foam.

Abstract: Foaming a polyurethane foam at above atmospheric pressure conditions using a mixture of polyisocyanate and a specific mixture of low molecular weight (high OH number) polyether and graft polyols produces viscoelastic foams with high firmness, low energy losses and high temperature sensitivity such that firmness is reduced by at least 25% when the foam is heated from room temperature (e.g., about 70° F. (21° C.)) to 100° F. (38° C.). The foam-forming ingredients are mixed together and foamed at controlled pressures in the range 1.05 to 1.5 bar (absolute), preferably 1.1 to 1.3 bar (absolute).

Abstract: Urethane molded products for polishing pad comprise two types of cells having different sizes in urethane molded products formed by mixing and curing an isocyanate-terminated urethane prepolymer and an active hydrogen-containing compound. The molded products may be made by a procedure comprising mixing expanded microballoons or non-expanded, thermally expandable microspheres and water with the isocyanate-terminated urethane prepolymer and active hydrogen-containing compound and curing the mixture.

Abstract: This invention provides a polymer polyol composition (I) comprising a polyol (A) and polymer particles (B) dispersed in (A), the polymer particles (B) being formed by polymerizing an ethylenically unsaturated compound (b) in a polyol, wherein the content of (B) in (I) is from 35 to 75 mass %, based on the mass of (I), and the amount of soluble polymers (P) dissolved in (A) is not more than 5 mass %, based on the mass of (A), and provides methods for producing the polymer polyol composition (I). Further, this invention provides a method for producing a foamed or non-foamed polyurethane resin, which method comprises reacting a polyol component with a polyisocyanate component in the presence or absence of a blowing agent, wherein the above polymer polyol composition is used at least as a portion of the polyol component.

Abstract: The invention relates to a one-shot or prepolymer process for preparing a visco-elastic polyurethane foam by reacting a polyisocyanate composition with a polyol composition comprising b1) an EO-rich polyol; b2) a polyol with an EO content between 20-50% and a primary hydroxy content of at least 50%; b3) a polyol with an EO content between 10-20% and a primary hydroxy content of at least 50%; and b4) a polyalkyleneglycol; according to the following proportions: b1: 30-85 wt %, b2: 5-65 wt %, b3: 5-40 wt %, b4: 0-50 wt %. The invention also relates to reaction systems comprising the above components and to the polyol composition.

Abstract: This invention relates to a process for the preparation of an isotropic rigid foam comprising the step of reacting: (A) an organic polyisocyanate component selected from the group consisting of: (1) a polymethylene poly(phenylisocyanate) and (2) an NCO-terminated prepolymer, and comprising the reaction product of: (a) a polyester comprising the reaction product of (i) pure ortho-phthalic acid or phthalic anhydride and (ii) a glycol and (b) a polymethylene poly(phenylisocyanate); with (B) an isocyanate-reactive component comprising: (1) a liquid OH-terminated prepolymer having a viscosity of more than about 100,000 mPa·s at 25° C.

Abstract: A melamine resin foam endowed with excellent oil repellency and which is improved in fragility without deteriorating the superior properties inherently possessed by melamine resin foams. The melamine resin foam with excellent oil repellency is obtained by coating an oleophobic component on a base material produced by foaming a resin composition comprising, as the main components, a melamine-formaldehyde condensate and a foaming agent.

Abstract: In a process generating a polyurethane foam by forming a mixture including isocyanate and polyol reactants, catalyst, and blowing agent, which mixture reacts exothermically to yield a rigid polyurethane foam, there is included expandable polystyrene beads made of a polystyrene that has a softening point at or below the maximum temperature reached during the exothermic reaction.

Abstract: A method of producing a heat insulating board comprising two opposed facings and a core made of a rigid synthetic resin foam, which comprises spraying or injecting a foam mix for the rigid synthetic resin foam into the space between the opposed face materials and expanding and curing the foam mix, wherein the foam mix comprises a particular polyol, a polyisocyanate, a foam stabilizer, a catalyst and a blowing agent, wherein the polyol contains a polyether polyol having a hydroxyl value of at most 84 mgKOH/g and an oxyethylene group content of at least 40 wt %; a polyether polyol which is obtained by adding a cyclic ether to an amine compound and has a hydroxyl value of from 250 to 900 mgKOH/g; and fine polymer particles stably dispersed in the polyol.

Abstract: The invention relates to a prepolymer process for preparing a high resilience flexible polyurethane foam by reacting a polyisocyanate composition comprising at least 80% by weight of 4,4′-MDI and having an NCO value below 20% with a polyol composition comprising b1) an EO-rich polyol; b2) a polyol with an EO content between 20-50% and a primary hydroxy content of at least 50%; and b3) a polyol with an EO content between 10-20% and a primary hydroxy content of at least 50%; according to the following proportions: b1:40-90 wt %, b2:5-60 wt %, b3:0-20 wt %. The invention also relates to reaction systems comprising the above components.

Abstract: The invention provides polyurethane elastomers (PU elastomers), a process for their production using special catalyst mixtures and their use in particular for the manufacture of shoe soles.

Abstract: The invention relates to flame-resistant HR cold-cure moulded foams with reduced smoke intensity and toxicity, a process for the preparation thereof and the use thereof.

Abstract: There is disclosed an elastic member constituted of polyurethane foam obtained by agitationally mixing with water, a urethane prepolymer synthesized from a polyol and a polyisocyanate, characterized by simultaneously employing as polyols, a (A) polymer polyol synthesized from a polyether polyol as a basis, comprising at least 70% by weight of oxypropylene moiety; and a (B) hydrophilic polyether polyol comprising at least 50% by weight of oxyethylene moiety, or simultaneously employing as polyols, the component (A), the component (B) and a (C) polyether polyol comprising at least 70% by weight of oxypropylene moiety. The above elastic member is simultaneously imparted with excellent characteristics such as low hardness, fine cells, low residual compressive strain, high strength and the like. The polyurethane foam which constitutes the elastic member can be produced by free foaming.

Abstract: Polyetherols based on solid initiator substances and liquid, hydroxyl-containing coinitiators are prepared by a catalyzed addition reaction of alkylene oxides by a process in which the initiator combination contains diols carrying ethoxy structures, the ratio of the average number of hydroxyl groups per mole of initiator combination to the number of ethoxy structures in the polyetherol being from 1:0.2 to 1:1.8 and the ratio of the amounts by weight of the diols carrying ethoxy structures to the average molecular weight of the polyetherol being from 1:2 to 1:15. The polyetherols prepared by this process are used for the preparation of PUR, in particular, rigid PUR foams.

Abstract: Disclosed is an acrylic sol for a sound insulating underbody coating. It includes acrylic polymer fine particles, a plasticizer, a filler, a plasticizer, a blocking type urethane resin, a curing agent and a foaming agent. Since it includes the acrylic polymer particles as a major constituent unit, it does not generate a hydrogen chloride gas and dioxins when it is burned. Moreover, since the paint film resulting from the acrylic sol has a net-shaped structure by the cross-linkage reactions of the urethane resin, and since the bulkiness of the paint film is increased by the foaming agent, it has a good cold resistance and adhesion property toward automotive steel plates, and effects a superb chipping resistance and sound insulating performance.

Abstract: The present invention is related to an improved process for obtaining oleochemical polyols from oils, principally of a vegetable origin. The polyols obtained consist of a mixture of ethers, esters, primary and secondary alcohols and have the characteristic of being self-compatible with the new blowing agents: hydrochlorofluorocarbons, HCFC's, hydrofluorocarbons, HFC's and hydrocarbons, HC's of a low molecular weight and low boiling point. The process of this invention is characterized because it uses Lewis type acids in such a way that they do not form precipitates and therefore it is not necessary to remove precipitates from the polyol. The process of the present invention makes it possible to obtain polyols with high functionality and controlled reactivity. These characteristics render the product suitable for use as a raw material in the production process of rigid foams, such as polyurethane for spraying, refrigeration and imitation wood, coatings, among others.

Abstract: The present invention provides tough, high modulus, low density thermoset polyurethane compositions which are useful in general as, for example, cast structural materials and in a preferred embodiment can be cured directly onto an aircraft engine fan blade, thereby providing a lighter blade, without concomitant loss in structural integrity or blade performance due to, for example, resistance to foreign object impacts and fuel efficiency. In a preferred embodiment, the composition is comprised of bis-amine compounds reacted with isocyanate-functional polyether polymers in the presence of hollow polymeric microspheres. The thermoset polymer compositions are formed by casting into a mold which is formed by a cavity within the metallic or composite fan blade or guide vane in the form of a pocket and a removable caul sheet. After the elastomeric polyurethane foam is injected through at least one injector port into the mold, the foam is cured.

Abstract: A urethane-modified polyisocyanurate foam obtained by reacting (A) a polyisocyanate compound component, (B) a polyol component, containing a modified phenolic resin obtained by adding 20 to 100 parts by weight of a polyhydric alcohol or its alkylene oxide adduct to 100 parts by weight of a benzylic ether type phenolic resin and heating under a reduced pressure, in an amount of at least 3 wt % to the total resin component, (C) water and (D) a foam stabilizer comprising a mixture of at least 2 silicone type surfactants having different surface tensions wherein a surfactant having a higher surface tension has a surface tension of higher than 22 dyne/cm and a surfactant having a lower surface tension has a surface tension of at most 22 dyne/cm, in the presence of (E) a urethane-forming catalyst and/or a trimerization catalyst.

Abstract: New, useful and surprisingly effective antiscorch compositions for utilization within polyurethane foam production methods which utilize very popular tertiary amine catalysts are provided. Such compositions require the presence of nominal yet effective amounts of organic cyclic ester materials. The ring systems of such materials appear to open during exposure to heat (during the curing process) and release carboxylic acids into the curing formulation. The tertiary amines become quenched by the carboxylic acids and thus do not exhibit heat destabilization. The resultant foams exhibit extremely low, if no, areas of excessive heating (i.e., scorch) and thus are substantially uniformly colored throughout. The processes and resultant foams are also contemplated within this invention.

Abstract: New, useful and surprisingly effective antiscorch compositions for utilization within polyurethane foam production methods which utilize very popular tertiary amine catalysts are provided. Such compositions require the presence of nominal yet effective amounts of organic cyclic ester materials. The ring systems of such materials appear to open during exposure to heat (during the curing process) and release carboxylic acids into the curing formulation. The tertiary amines become quenched by the carboxylic acids and thus do not exhibit heat destabilization. The resultant foams exhibit extremely low, if no, areas of excessive heating (i.e., scorch) and thus are substantially uniformly colored throughout. The processes and resultant foams are also contemplated within this invention.

Abstract: A flexible, latex-like polyurethane foam having the “feel” and comfort of a latex foam and an Indentation Force Deflection (25% IFD as low as 3 lbs.) and the method of making such foam by reacting a mixture of triol polyether polyols, namely, a) a major proportion of a triol polyol having a hydroxyl content of about 50-80%, a 10-25% ethylene oxide cap and a molecular weight of about 3,000-6,500, (b) a minor proportion of a polymer triol polyol, preferably SAN polyol, having a molecular weight of about 3,000-6,5000; and (c) a very minor amount of a triol polyol having a primary hydroxyl content of at least 50% and about 40-90% ethylene oxide cap and a molecular weight of from 1,000-6,000. The polyol mixture is reacted with a MDI isocyanate in the presence of a critical amount of from about 1.5 to about 3.5 parts by weight of water, an auxiliary blowing agent and an amine catalyst.

Abstract: Safety clothing is produced by molding polyether-based plastic-forming compositions. Particularly preferred articles of safety clothing produced by this process are safety shoe soles.

Abstract: The invention provides a method of forming a polyurethane foam suitable for use as a wound-contacting layer, said method comprising: mixing 1 part by weight of an isocyanate-capped prepolymer having from 0.5 to 4.8 meq. NCO groups/g with from 0.4 to 1.0 parts by weight of water and an effective amount of a nonvolatile pharmaceutically acceptable acid to form a prepolymer mixture; allowing said prepolymer mixture to cure to form a foamed product; followed by drying the foamed product. The invention also provides acidified polyurethane foams obtainable by this method, and wound dressings comprising such foams.

Abstract: A fill for cushions that includes a quantity of resilient beads and a quantity of gelatinous particles. The resilient beads are deformable and have shape memory. The gelatinous particles are elongatable and deformable. The gelatinous particles are tacky and tend to hold the resilient beads together in a maintainable yet deformable shape of the user's choosing.

Abstract: The present invention relates to finely dispersed, low-viscosity polymer polyols which are stabilized in a novel manner and which are characterized by a high content of polystyrene or polystyrene copolymers. This invention also relates to the preparation of such polymer polyols, and their use for the preparation of polyurethane materials.

Abstract: An improved material comprising the reaction product of an A-side having an isocyanate and a B-side having a cross-linker comprising a multifunctional alcohol, a vegetable oil, preferably a blown/oxidized vegetable oil, most preferably a blown/oxidized soybean oil, and a catalyst and the method of producing the same.

Abstract: A sprayable polymeric material and a process for preparing the material which contains a fibrous material, dispersed throughout the polymeric material. A restriction free spray nozzle is provided for mixing and spraying the polymeric material having a fibrous material, the nozzle having a restriction free check valve. A reinforced structure, and a method of making the structure are provided, the structure having layers of the polymeric material (both film and foam) containing the fibrous material. A flexible liner is provided of a porous geotextile fabric and a polyurethane composition comprising the fibrous material sprayed over the geotextile fabric.

Abstract: Polymer polyols and process for their production are disclosed. The process requires the selection of specified free radical polymerization initiators and amounts thereof to produce a polymer polyol having desired properties including a Brookfield Viscosity of equal to or less than (a e[(0.051)(b)]) where “a” is the viscosity of the carrier polyol and “b” is the [(weight fraction of solids)(100)].

Abstract: A polyurethane foam which is obtained by reacting an addition-polymerizable active hydrogen component comprising a compound having a group containing active hydrogen and an addition-polymerizable functional group or comprising both this compound and a compound containing at least 2.5 groups (on the average) containing active hydrogen and not containing addition-polymerizable functional groups with an organic polyisocyanate in the presence or absence of at least one auxiliary selected from the group consisting of foaming agents and additives to polymerize the addition-polymerizable functional group and simultaneously form a polyurethane, and which has a structure in which the chains formed by the addition polymerization have been cross-linked to the polyurethane chains. The polyurethane foam is useful as a rigid polyurethane foam excellent in hardness, dimensional stability, etc. and usable as a heat insulator, shock-absorbing material, synthetic wood, etc.

Abstract: A composite polyurethane foam structure and method of preparing the composite structure, which structure includes a semirigid-rigid polyurethane foam layer having bonded, free, unreacted, ethylenically unsaturated groups like allyl or acrylic groups. The structure includes a cured, unsaturated resin composition layer which is chemically bonded to one or both surfaces of the polyurethane foam layer through the polymerization of the allyl or acrylic group in the foam surface with the polyester resin composition.

Abstract: A polyurethane chip molded product having improved properties and a method for manufacturing the same are provided. The polyurethane chip molded product is manufactured by press-molding polyurethane chips and a binder together, wherein at least some of the polyurethane chips are split polyurethane chips made by splitting foamed polyurethane.

Abstract: The microcellular polyurethane elastomer of the present invention has (1) an overall density (D) of 100 kg/m3 or more but 900 kg/m3 or less, and (2) overall density (D) and compression set (CS2, unit: %) satisfying the relationship shown by the following equation (1): and CS2≦0.00008*D2−0.091*D+42   (1)  overall density (D) and cell diameter (X, unit: &mgr;m) on the skin surface satisfying the relationship shown by the following equation (2): X≦120e−0.0015D   (2).

Abstract: The invention provides a high molecular weight polyol comprising dispersed therein the reaction of a polyisocyanate and low molecular weight polyol where said low molecular weight is a mixture of an alkanolamine with a polyethylene glycol having a molecular weight of less than 600. The invention also provides a method of making a polyurethane foam by reacting a polyisocyanate and a polyol using a blowing agent, where the polyol comprises the polyol of the invention. The invention also relates to the foam, especially the flexible foam, obtained by the process of the invention.

Abstract: The high-durability flexible polyurethane cold cure molded foam of the invention has an overall density of not less than 35 kg/m3 and not more than 45 kg/m3 and a wet heat compression set of not more than 15%, and preferably has a hardness change ratio, as determined in a repeated compression test, of not more than 15%. This foam can be obtained by the process of the invention. The process of the invention is a process for producing a flexible polyurethane cold cure molded foam obtained from a polyol and/or a polymer polyol containing dispersed polymer microparticles obtained by radical polymerizing a compound having an unsaturated bond in the polyol, water, a catalyst and a polyisocyanate, wherein the polyol is a polyol synthesized by the use of a catalyst containing at least one compound selected from the group consisting of a compound having a nitrogen-phosphorus double bond, cesium hydroxide and rubidium hydroxide.

Abstract: Polyurethane foams formed under vacuum (below atmospheric pressure) conditions using a specific mixture of polyisocyanate and with a major portion of methylene diisocyanate (MDI) and a specific mixture of polyether and graft polyols exhibit superb static shock cushioning characteristics (energy absorption) as illustrated by drop curves of deceleration versus static load. The foam-forming ingredients are mixed together and foamed under controlled pressures in the range 0.5 to 0.90 bar (absolute), preferably 0.5 to 0.8 bar (absolute). A major portion of the MDI is 4, 4′ methylene diisocyanate.

Abstract: Process for making molded flexible polyurethane foams MDI-based foams with high resilience using MDI and a polyol composition.

Abstract: A conductive quasi-solution useful for making a homogeneously conductive single-phase polyurethane, comprising a transition metal salt, a carrier solution, and a dispersing agent, wherein said conductive quasi-solution has a transition metal salt concentration between 10 and 30% by weight, and methods of making thermoset and thermoplastic polyurethane polymers therewith.

Abstract: Process for the preparation of a macramer suitable as a stabilizer precursor in a polymer polyol, which process comprises reacting a polyol with a cyclic dicarboxylic acid anhydride not containing any polymerizable double bond, and subsequently reacting the adduct thus obtained with an epoxide compound containing a polymerizable double bond. The macromers can be applied for the preparation of polymer polyols which are, in turn, very suitable for manufacturing flexible polyurethane foams.

Abstract: New, useful and surprisingly effective polymeric triphenylmethane colorant-containing compositions which exhibit very low color degradation within polyurethane foams. Generally during polyurethane foam production, certain amine-based hydroxyl-group containing catalysts deleteriously attack the nitrogen linking groups within triphenylmethane polymeric colorants. Such compositions require the presence of nominal yet effective amounts of organic cyclic ester materials. The ring systems of such materials appear to open during exposure to heat (during the foaming procedure) and release carboxylic acids into the foaming formulation. The tertiary amines become quenched by the carboxylic acids and thus do not exhibit degradation of the TPM-based chromophore. The resultant foams exhibit substantially uniform color throughout. The processes and resultant foams are also contemplated within this invention.

Abstract: Low density microcellular polyurethane foams suitable for athletic shoe midsoles and other applications are prepared by diol chain extension of 12 to 16% free NCO isocyanate-terminated prepolymers prepared by reacting an excess of di- or polyisocyanate with one or more high molecular weight, high functionality polyoxypropylene diols preferably employing water as a reactive blowing agent. The microcellular elastomers exhibit increased hardness despite the higher molecular weight of the polyoxypropylene diol and further exhibit greater tear resistance, lower compression set, and markedly lower shrinkage.

Abstract: A polyurethane foam which is obtained by reacting an addition-polymerizable active hydrogen component comprising a compound having a group containing active hydrogen and an addition-polymerizable functional group or comprising both this compound and a compound containing at least 2.5 groups (on the average) containing active hydrogen and not containing addition-polymerizable functional groups with an organic polyisocyanate in the presence or absence of at least one auxiliary selected from the group consisting of foaming agents and additives to polymerize the addition-polymerizable functional group and simultaneously form a polyurethane, and which has a structure in which the chains formed by the addition polymerization have been cross-linked to the polyurethane chains. The polyurethane foam is useful as a rigid polyurethane foam excellent in hardness, dimensional stability, etc. and usable as a heat insulator, shock-absorbing material, synthetic wood, etc.

Abstract: Polyurethane foams formed under vacuum (below atmospheric pressure) conditions using methylene diisocyanate or a specific mixture of polyisocyanate and with a major portion of methylene diisocyanate (MDI) with a specific mixture of polyether and graft polyols produces cushioning foams with lower density (1.4 to 1.8 pounds per cubic foot) and higher support factor (above 2.4). The foam-forming ingredients are mixed together and foamed under controlled pressures in the range 0.5 to 0.9 bar (absolute), preferably 0.6 to 0.8 bar (absolute). A major portion of the MDI is 4,4′ methylene diisocyanate.

Abstract: A process for manufacturing an insulation board comprising a rigid polyisocyanurate foam core having two major surfaces and a facing material on at least one of the major surfaces, comprising (a) conveying a facing material along a production line for attachment to one major surface of the core; (b) applying a foam-forming mixture of polyisocyanurate to the facing material such that the mixture is applied along the entire width of the facing material; (c) optionally conveying a second facing material along the production line for attachment to the other major surface of the core; (d) conveying the facing material with applied foam-forming mixture into a laminator which comprises a gap for foam expansion and allowing the mixture to foam and expand to fill the gap within the laminator; and (e) curing the foam. The process provides excellent boardstock thickness control, minimal wasted densification at the foam/facer interface, greater compressive strength and high line speed.

Abstract: An insulated structure is formed by injection of a foamed thermal-insulating material created by foaming into a space between a plastic board and metal plate with a disposition of copper pipes. A non-halogenated organophosphorus compound having a molecular weight over 150 as an additive with an OH group as a functional group is mixed with the raw materials of the foamed thermal-insulating material including polyol, a foam stabilizer, a catalyst, a foaming agent having at least one component of hydrocarbon, and an organic polyisocyanates. By adding a non-halogenated organophosphorus compound, which has a molecular weight over 150 as an additive with an OH group as a functional group, the burning rate of the foamed thermal-insulating material becomes the same as that of the foamed thermal-insulating material which uses CFC11 as a foaming agent.

Abstract: An electrically conductive flexible polyurethane foam comprising a polyurethane and at least one conductive filler dispersed therein in an amount effective to provide EMI/RFI shielding, wherein the polyurethane comprises an isocyanate component to active hydrogen component in a ratio of at most about 0.20:1. Preferably, the foam has compression deflection value at 50% compression of at most about 25 psi, a foam density of at most 0.95 g/cm3 and/or noise shielding effectiveness at a frequency of about 20 to about 1000 MHz of at least about 10 dB.

Abstract: A thermosetting plastic foam solid formed from the reaction product of: (a) either polyisocyanate or isocyanate-based foam; (b) a polyol-based foam; (c) a catalyst which is capable of promoting the thermosetting reaction between the polyisocyanate or isocyanate-based foam and the polyol-based foam; and (d) a blowing agent which comprises a high purity cyclopentane product, wherein the high purity cyclopentane product is about 95% or greater pure cyclopentane, and, optionally, (e) water and/or (f) liquid flame retardant.