Abstract: A cleaning implement for cleaning a target surface is provided that includes an erodible foam adapted to contact a surface to be cleaned and a rheological solid composition comprising a crystallizing agent and an aqueous phase.

Abstract: The invention generally pertains to the use of polyurethane foam blown by at least one blowing agent having a boiling point at atmospheric pressure of between ˜?50° C. to less than ˜5° C., including miscible blends thereof, which passes all United States Coast Guard Title 33, Part 183 specifications wherein the buoyant force of the froth polyurethane or polyisocyanurate foam is not reduced more than 5% after exposure to being immersed in a fully saturated gasoline vapor atmosphere, in reference fuel B, in reference oil No. 2, and in a 5% solution of Na3PO4.

Abstract: A method for producing a polyurethane foam includes mixing and reacting a polyurethane foam raw material containing a polyol, an isocyanate, a foaming agent, and a catalyst, wherein the polyurethane foam raw material contains sodium bicarbonate and an organic solid acid such as citric acid or malic acid.

Abstract: Disclosed are HCFO-containing isocyanate-reactive compositions, foam-forming compositions containing such isocyanate-reactive compositions, rigid PUR-PIR foams made using such foam-forming compositions, and methods for producing such foams, including use of such foams as insulation in discontinuous foam panel applications. The isocyanate-reactive composition can exhibit a long shelf life, be shelf-stable, and produce a foam with good physical properties.

Abstract: The present invention relates to an isocyanate reactive component comprising a specific polyol mixture useful for the preparation of homogenous reactive polyurethane compositions. The invention further relates to a reactive polyurethane composition comprising such isocyanate reactive component and an isocyanate component. It also relates to a homogeneous polyurethane foam having good mold release property and surface quality prepared from such reactive polyurethane compositions. In a further aspect, it relates to a polyurethane composite comprising such homogenous polyurethane foam and having good and flat surface appearance after processing.

Abstract: The present invention relates to a process for preparing a porous material, at least providing a mixture (I) comprising a composition (A) comprising components suitable to form an organic gel and a solvent(B), reacting the components in the composition (A) in the presence of the solvent (B) to form a gel, and drying of the gel obtained in step b), wherein the composition (A) comprises a catalyst (C) selected from the group consisting of alkali metal and earth alkali metal salts of a saturated or unsaturated monocarboxylic acid with 4 to 8 carbon atoms. The invention further relates to the porous materials which can be obtained in this way and the use of the porous materials as thermal insulation material and in vacuum insulation panels, in particular in interior or exterior thermal insulation systems.

Abstract: Polyurethane composites and methods of preparation are described herein. The methods of making the polyurethane composite can include mixing (1) at least one isocyanate selected from the group consisting of diisocyanates, polyisocyanates, and mixtures thereof, (2) at least one polyol, (3) an inorganic filler, and (4) an evaporative coolant in an extruder to form a mixture. The method also include extruding the mixture into a mold cavity, generating heat in the mold cavity from the reaction of the at least one isocyanate and the at least one polyol, and allowing the evaporative coolant to migrate to an interface between the mixture and the interior mold surface. The temperature of the mixture causes evaporation of the evaporative coolant at the interface thereby removing heat at the interface. Suitable evaporative coolants for use in the methods of making the polyurethane composites include hydrofluorocarbons and hydrochlorofluorocarbons.

Abstract: The present invention provides a self-collapsing, moisture curable one component polyurethane foam (1K PU) composition from moisture curable polyurethane prepolymers and to methods of making weather resistant barriers and formed in place gaskets therefrom. The foam compositions are packed under pressure with a blowing agent. In the methods, the foams are applied to gaps in the exterior (sheathing) of a building under construction and collapse on cure to enable application an aqueous weather barrier coating thereover within an hour. The foams also cure when applied on or adjacent a structure to form a foam gasket that enables installation of additional structural elements over or adjacent the foam gasket without bowing or damage to the structure treated.

Abstract: A bio-based polyol-containing polymer foam material, which includes a bio-based polyol-containing polymer foam present in a bulk concentration of the bio-based polymer foam material of 99% by weight or greater; and a graphite material present in a bulk concentration of the bio-based polyol-containing polymer foam material of 1% by weight or less. The bio-based polyol-containing polymer foam material is especially suitable for automotive components having deadening and vibration management features.

Abstract: The present invention relates to a process for producing polyurethane foam moldings where the density of the molding is at most 500 g/L, by mixing the following to give a reaction mixture: a) organic polyisocyanates with b) polyesterols, c) blowing agents, d) cell-opening additives selected from the group consisting of homo- or copolymers based on ethylhexyl acrylate, on polybutadiene, on polyisobutene, and on diorganosilicones, or a mixture of two or more of said antifoams, e) silicone-based cell stabilizers and optionally f) chain extenders and/or crosslinking agents, g) catalysts, and h) other auxiliaries and/or additives, and charging the materials to a mold, and permitting them to complete a reaction to give a polyurethane foam molding. The present invention further relates to polyurethane moldings obtainable by this process, and to the use of said moldings as shoe sole, steering wheel, seat, or armrest.

Abstract: A composition and process useful to make flexible polyurethane foams and in particular flexible molded polyurethane foams is disclosed. The usage of dipolar aprotic liquids such as DMSO, DMI, sulfolane, N-methyl-acetoacetamide, N,N-dimethylacetoacetamide as well as glycols containing hydroxyl numbers OH#?1100 as cell opening aides for 2-cyanoacetamide or other similar molecules containing active methylene or methine groups to make a polyurethane foam is also disclosed. The advantage of using cell opener aids results in a) no foam shrinkage; b) lower use levels of cell opener; c) foam performance reproducibility d) optimum physical properties. In addition, combining the acid blocked amine catalyst together with the cell opener and the cell opener aid results in a less corrosive mixture as well as provides a method that does not require mechanical crushing for cell opening.

Abstract: A method of making an anisotropic filtration media includes foaming a media, straining the media in a selected direction, and relieving strain of the media in the selected direction.

Abstract: There is provided an expandable phenolic resin composition comprising: a phenolic resin; an acid curing catalyst for the resin; a foaming agent; and a surfactant, wherein the foaming agent comprises a hydrocarbon-based foaming agent; and the surfactant is a polyoxyethylene alkyl ether having an alkyl ether moiety having 14 to 22 carbon atoms, and the content of the surfactant is 0.01 to 10 parts by weight relative to 100 parts by weight of the phenolic resin.

Abstract: Disclosed are a process of producing a polyurethane foam product, a polyurethane foam product pre-mix, polyurethane foam product formulation, and a polyurethane foam product. The process of producing the polyurethane foam product includes contacting a halohydrin component with a polyurethane foam product pre-mix. The polyurethane foam product pre-mix includes the halohydrin component. The polyurethane foam product formulation includes a polyol component, an isocyanate component, and a halohydrin component. The polyurethane foam product is formed by the pre-mix having the halohydrin component.

Abstract: According to the present invention, a urethane foam rubber is constituted with a polymer having a moiety derived from a diisocyanate, and a moiety derived from a polyether polyol, number of atoms composing the shortest path along a bond intervening two NCO groups in at least a part of the diisocyanate is no less than 11, Mw of the polyether polyol is no less than 1,000 and no greater than 4,000, and the polymer exhibits at least one of the following features (i) to (iii): (i) having moieties derived from two or more types of the polyether polyols that are each different in terms of at least one of a weight average molecular weight and an oxyalkylene unit; (ii) having the moiety derived from the polyether polyol that includes two or more types of oxyalkylene units; and (iii) further having a moiety derived from a tri- or higher multi-functional isocyanate.

Abstract: Polyurethane foam for seat pad prepared by foam-molding a foaming liquid containing (A) a polyol component and (B) a polyisocyanate component. Polyol component (A) includes, based on polyol component, 30% to 55% by mass of (a-1) a polyether polyol which is a block copolymer obtained through ring-opening polymerization of ethylene oxide (EO) and propylene oxide (PO), and has a molar ratio of repeating units derived from EU to repeating units derived from PO of 5/95 to 25/75 and a number average molecular weight of 6,000 to 8,000. Polyol component (A) further includes, based on polyol component, 2% to 20% by mass of (a-2) a polyether polyol which is a block copolymer obtained through ring-opening polymerization of EO and PO, and has a molar ratio of repeating units derived from EO repeating unit derived from PO of 30/70 to 90/10 and a glass-transition point of ?65° C. or less.

Abstract: Embodiments of the invention provide for viscoelastic polyurethane foams. The foams are made from reaction system which includes (a) an isocyanate reactive component, (b) a isocyanate component, (c) one or more blowing agents, (d) a catalyst component, and (e) a silicone based surfactant. The isocyanate reactive component includes at least (i) from 25 to 80% by weight of at least one polyoxyethylene capped polyoxypropylene/polyoxyethylene polyol having a combined number average equivalent weight from 1300 to 1700, a polyoxyethylene percentage of between 75% and 95% by weight of the combined amounts of polyoxypropylene and polyoxyethylene, and a primary OH percentage of between 80 and 95% of the total number of OH groups of the polyoxyethylene capped polyoxypropylene/polyoxyethylene polyol, and (ii) from 5 to 30% by weight of the isocyanate reactive component of at least one low functionality polyol having a functionality of between 1.5 and 2.

Abstract: Process for producing silica-comprising dispersions comprising a polyetherol or a polyether amine, which comprises the steps of (i) admixing an aqueous silica sol (K) having an average particle diameter of from 1 to 150 nm and a silica content, calculated as SiO2, of from 1 to 60% by weight and a pH of from 1 to 6 with at least one polyetherol (b1) and/or polyether amine (b2) based on ethylene oxide and/or propylene oxide and having an average OH or amine functionality of from 2 to 6 and a number average molecular weight of from 62 to 6000 g/mol, (ii) distilling off at least part of the water, (iii) admixing the dispersion with at least one compound (S) having at least one at least monoalkoxylated silyl group and at least one alkyl, cycloalkyl or aryl substituent, where this substituent may have groups which are reactive toward an alcohol, an amine or an isocyanate in an amount of from 0.

Abstract: There are provided a composition for silicone rubber foam, a manufacturing method of a silicone rubber foam, and a silicone rubber foam in which it is possible to control the foaming states. The composition for silicone rubber foam contains: (A) 100 parts by mass of polyorganosiloxane having a degree of polymerization of 4,000 to 10,000 and having two or more alkenyl groups at a content of 0.001 mmol/g or more and less than 0.3 mmol/g; an amount of polyorganohydrogensiloxane having an average of two or more Si-atom-bonded hydrogen atoms so that a molar ratio of the hydrogen atoms to the alkenyl groups in the (A) component is 0.001 to 5; 0.1 to 10 parts by mass of an organic foaming agent with a decomposition temperature of 50 to 250° C.; 5 to 200 parts by mass of silica powder; and a catalyst amount of a platinum-based metal catalyst activated with ultraviolet rays.

Abstract: A method of making foam imparts antimicrobial and antiodorant qualities to the foam. Green tea powder is added to the polyol raw materials for making memory foam. The green tea memory foam is used to make pillows, cushions and mattresses. Green tea foam in the top layer of a mattress acts as an antiodorant such that less of the chemical smell of the memory foam is perceived by the user. In addition, the bacteria and mold that would otherwise develop in the moist warmer sleeping environment on memory foam are killed by the green tea additive to the foam. Measurable antimicrobial and antiodorant qualities in the green tea foam are achievable by adding green tea powder constituting less than 2% of the weight of the resulting green tea foam. A neck-support contour pillow is made using memory foam that contains green tea and a green dye.

Abstract: The present invention relates to a reactive cell opener composition that includes a base oil, and a metal salt of a fatty acid having a hydroxyl group coupled to an isocyanate group. The invention also relates to a polyol composition that includes a polyol, a foam stabilizer, and a cell opener mixed with each other. The present invention also relates to an open-celled polyurethane foam manufactured from a polyol composition.

Abstract: Processes for producing impact copolymers are provided. Ethylene and at least one copolymer can be polymerized in the presence of one or more catalysts, polypropylene particles, and one or more halocarbon compounds to produce an impact copolymer that includes the polypropylene particles and an ethylene copolymer.

Abstract: Processes for producing impact copolymers are provided. Ethylene and at least one comonomer can be polymerized in the presence of one or more catalysts, polypropylene particles, and an inert solvent to produce an impact copolymer. The polypropylene particles can have a weight average particle size along the longest cross-sectional length thereof of about 0.05 mm to about 5 mm and a pore volume of less than 80%. The inert solvent can be present in a volume amount of about 0.1 to about 2 times the pore volume of the polypropylene particles.

Abstract: A viscoelastic polyurethane foam is the reaction product of at least one natural oil derived polyol and at least one aromatic compound having an average of more than one isocyanate group. A viscoelastic polyurethane foam has an air flow of at least about 0.5 l/s, wherein the foam is formed in the substantial absence of copolymer polyol and has not (yet) been mechanically reticulated and is preferably prepared using at least one natural oil derived polyol, more preferably in an amount of at least about 20 weight percent of the polyols used. A process of preparing a viscoelastic foam, comprises steps of (A) forming a reaction mixture including at least one polyol, at least one polyisocyanate, water, at least one catalyst wherein a the polyol comprises at least one natural oil derived polyol; and (B) subjecting the reaction mixture to conditions sufficient to result in the reaction mixture to expand and cure to form a viscoelastic polyurethane foam.

Abstract: A washable polyurethane foam has a structure that does not degrade when washed because of being soaked with the washing liquid, or because of treatment with cleaning detergents and/or soap, or because of drying.

Abstract: A polyurethane foam composition that includes polyol, isocyanate, a catalyst, a surfactant, a physical blowing agent, a chemical blowing agent, a nucleating agent and a silsesquioxane compound is provided.

Abstract: Aqueous cold-cure flexible foam stabilizer including the following components: a) from ?0.1 to ?80% by weight of at least one water-insoluble polysiloxane compound having a molecular weight of from ?300 g/mol to ?10 000 g/mol, b) ?2% by weight of water, c) ?0.1% by weight of surfactant, d) from ?0 to 10% by weight of additives selected from the group consisting of thickeners, antifreezes, organic solvents and biocides, e) ?0% by weight of water-soluble siloxane(s), with the proportion by weight of the abovementioned components being selected so that the sum of the proportions by weight of the components is not more than 100% by weight, based on the aqueous cold-cure flexible foam stabilizer formulation.

Abstract: The invention relates to a process for the targeted reorganization of polydimethylsiloxanes over sulphonic acid-containing cation exchange resins which have water contents of 8 to 25% by weight, and polydimethylsiloxanes thus prepared and the use thereof.

Abstract: The present invention relates to compositions containing polyether-siloxane copolymers which are based on branched SiH-functional siloxanes, where at least one of the polyether-siloxane copolymers has a radical —OR8 where R8=hydrogen or an alkyl radical having from 1 to 10 carbon atoms which is bound to a silicon atom, a process for producing polyurethane foam in which these compositions are used as foam stabilizers, polyurethane foams containing these compositions and the use of these polyurethane foams.

Abstract: To provide a process for producing a flexible polyurethane foam which is excellent in low resiliency without using a plasticizer which is excellent in durability, and at the same time, which has high air permeability. A process for producing a flexible polyurethane foam, which comprises reacting a polyol mixture containing the-polyether polyol (A) obtained using a DMC catalyst; the-polyether polyol (B) and the polyether monool (D), with a polyisocyanate compound, in the presence of a foam stabilizer (X) which is a silicone type compound, a urethane-forming catalyst and a blowing agent, at an isocyanate index of at least 90, wherein: Foam stabilizer (X) is a silicone type compound containing one or more types of dimethylpolysiloxane represented by the following formula (I): where n is from 1 to 30 on average.

Abstract: Polymeric foams and elastomer/hydrogel bicontinuous composite structures derived from high internal phase emulsions and possessing shape-memory characteristics are disclosed, as well as processes for forming the same and uses thereof in, for example, manufacturing of various articles.

Abstract: Provided are methods for making textured implantable materials made from two part RTV silicone foams and having a desired color or tone without the need for dyes or colorants.

Abstract: A method of manufacturing polyurethane (PU) foam toys with no restriction on playing environment comprises steps as follows: (1) Placing the prefabricated flexible cover into the foaming mold, and then vacuuming to firmly attach the cover to the inner wall of the mold; (2) Spraying adhesives at the periphery and the interior of the flexible cover while maintaining the continuous vacuum pressure; (3) Injecting the mixed polyurethane into the foaming mold; (4) Closing the mold and performing condensation reaction; (5) Opening the mold to get the product. The present invention is about the production of polyurethane form toys by formulating polyurethanes and binding the interior polyurethane body and flexible cover with adhesives. Because of its resilient and sturdy characteristics, the thermoplastic flexible cover provides protection to the interior polyurethane foam body, effectively eliminating problems like mildew growth, difficulties of cleaning and preventing damage.

Abstract: A reaction system comprising an organic polyisocyanate and an isocyanate reactive component for preparation of a viscoelastic polyurethane foam is provided. The isocyanate reactive component comprises (i) from 10 to 50% by weight of one or more low equivalent weight propylene oxide rich (PO-rich) polyols having a combined number average equivalent weight from 200 to 500, (ii) from 45 to 95% by weight of one or more ethylene oxide (EO-rich) polyols having a combined number average equivalent weight from 200 to 800 and an ethylene oxide content from 40% to 65% by weight of the total mass of the EO-rich polyol and at least one of (iii) from 10 to 30% by weight of one or more high equivalent weight PO-rich polyols having a number average equivalent weight from 800 to 2,000 or (iv) from 10 to 40% by weight of one or more propylene oxide co-polymer polyols containing styrene-acrylonitrile.

Abstract: The present invention relates to a composition and process for preparing fine-celled polyurethane foam obtained from frothing a polyurethane foam-forming composition possessing a synergistic combination of silicone surfactants.

Abstract: A porous silica precursor composition is herein provided and the precursor composition comprises an organic silane represented by the following chemical formula 1: R1m(R2—O)4-mSi (in the formula, R1 and R2 may be the same or different and each represent an alkyl group, and m is an integer ranging from 0 to 3); water; an alcohol; and a quaternary ammonium compound represented by the following chemical formula 2: R3N(R4)3X (in the formula, R3 and R4 may be the same or different and each represent an alkyl group and X represents a halogen atom). The composition is prepared by a method comprising the step of blending the foregoing components. The porous silica precursor composition is coated on a substrate and then fired to thus form a porous silica film. Also disclosed herein include a semiconductor element, an apparatus for displaying an image and a liquid crystal display, each having the foregoing porous silica film.

Abstract: The object of the invention is a method for the production of foams on silicon basis from polymer mixtures (A) containing silicon, wherein at least one compound (V) is used that contributes to the formation of the polymer network, and which carries at least one alkoxy silyl group of the general formula [1a], [1b], or [1c] ?Si—O—(R1)(R2)(R3) [1a], ?Si(R5)—O—C(R1)(R2)(R3) [1b], ?Si—O—C(O)—U [1c], from which upon curing of the polymer mixtures (A) at least one molecule (XY) is split which is gaseous during processing and causes the formation of foam in the polymer mixture (A), and a catalyst (K) selected from a Brönstedt acid, Brönstedt base, Lewis acid, and Lewis base, where R1, R2, R3, R5, and U have the meanings as stated in claim 1, and where polymer mixtures (A) which form SiO2 during the cross-linking process are excluded.

Abstract: The invention relates to a process for manufacturing porous materials, which comprises the following steps: preparation of a solution of at least one structuring agent, having at least two structuring parts linked by at least one type of reversible non-covalent interaction; formation of the structured or porous material; separation of the at least two parts of the structuring agent at low temperature; and recovery of at least 50% by weight of the two non-degraded structuring parts and the porous material.

Abstract: A process for producing silicone foam, involves a reaction mixture in which hydrogen is released in a first reaction of compounds with at least one Si—H group in the presence of a basic catalyst. The reaction mixture is crosslinked in a second reaction in the presence of a metal catalyst.

Abstract: Aqueous cold-cure flexible foam stabilizer including the following components: a) from ?0.1 to ?80% by weight of at least one water-insoluble polysiloxane compound having a molecular weight of from ?300 g/mol to ?10 000 g/mol, b) ?2% by weight of water, c) ?0.1% by weight of surfactant, d) from ?0 to 10% by weight of additives selected from the group consisting of thickeners, antifreezes, organic solvents and biocides, e) ?0% by weight of water-soluble siloxane(s), with the proportion by weight of the abovementioned components being selected so that the sum of the proportions by weight of the components is not more than 100% by weight, based on the aqueous cold-cure flexible foam stabilizer formulation.

Abstract: A one-component-foam formulation contains a propellant in a concentration range of from 5 to 35 weight-percent of total formulation weight and contains at least 50 weight-percent non-liquefied inert gases based on total propellant weight, a polyol, a silicone glycol copolymer and less than 0.01 weight-percent of a cell opener based on polyol weight. An article contains five liters or more of the one-component-foam formulation within a container compressed to a pressure of at least 15 atmospheres pressure. A method for dispensing the one-component foam formulation includes providing the article and expelling the formulation from the container through a dispensing means onto a substrate and allowing the formulation to expand into a stable polymeric foam having a density of 45 kilograms per cubic meter or less.

Abstract: Preparation and use of polyurethane foams with the use of foam stabilizers of the general formula (I)

Abstract: A flexible polyurethane foam excellent in the vibration characteristics and the load-deflection characteristics, a process for producing the flexible polyurethane foam stably and inexpensively, and a seat for an automobile excellent in posture-stability performance and supported feeling with little bottom-hitting feeling, are provided. When a polyoxyalkylene polyol and a polyisocyanate compound are reacted in the presence of a urethane-forming catalyst, a blowing agent and a foam stabilizer, a predetermined amount of a compound of the following formula (1) is used: wherein the average of n is from 13 to 2,100.

Abstract: The invention provides a polishing pad by which optical materials such as lenses, reflecting mirrors etc., or materials requiring a high degree of surface planarity, as in the polishing of silicone wafers, glass substrates or aluminum substrates for hard disks, or general metal polishing, can be flattened with stability and high polishing efficiency. The invention also provides a polishing pad for semiconductor wafers, which is superior in planarizing characteristic, is free from scratches and can be produced at low cost. There is provided a polishing pad which is free from dechucking error so that neither damage to wafers nor decrease in operating efficiency occurs. There is provided a polishing pad which is satisfactory in planarity, within wafer uniformity, and polishing rate and produces less change in polishing rate. There is provided a polishing pad which can make planarity improvement and scratch decrease compatible.

Abstract: The present invention relates to aqueous cold-cure flexible foam stabilizer formulations for use in the production of highly elastic cold-cure polyurethane foams or for use in the production of cold-cure flexible foam activator blends for highly elastic cold-cure polyurethane foams, wherein the aqueous cold-cure flexible foam stabilizer formulation comprises the following components a) from ?0.1 to ?80% by weight of at least one water-insoluble polysiloxane compound having a molecular weight of from ?300 g/mol to ?10 000 g/mol, b) ?2% by weight of water, c) ?0.1% by weight of surfactant, d) from ?0 to 10% by weight of additives selected from the group consisting of thickeners, antifreezes, organic solvents and biocides, e) ?0% by weight of water-soluble siloxane(s), with the proportion by weight of the abovementioned components being selected so that the sum of the proportions by weight of the components is not more than 100% by weight, based on the aqueous cold-cure flexible foam stabilizer formulation.

Abstract: To provide a process for producing a flexible polyurethane foam, which comprises reacting a polyol compound and a polyisocyanate compound in an open system substantially without using a silicone foam stabilizer. A process for producing a flexible polyurethane foam, which comprises reacting a polyol composition (I) containing at least a polyol compound and containing at least one of a polyol compound (A) and a monool compound (X) obtained by ring-opening polymerization of an alkylene oxide with an initiator by using a double metal cyanide complex catalyst, and a polyisocyanate composition (II) in the presence of a urethane-forming catalyst made of a metal catalyst and an amine catalyst, and a blowing agent, in an open system substantially without using a silicone foam stabilizer.

Abstract: An aluminum chelate latent curing agent includes an aluminum chelate curing agent, and a porous resin that holds the aluminum chelate curing agent and is obtained by subjecting a polyfunctional isocyanate compound to interfacial polymerization while simultaneously subjecting a polyfunctional radical polymerizable compound to radical polymerization in the presence of a radical polymerization initiator. In the aluminum chelate latent curing agent, a silanol compound of the formula (A) is further held in the porous resin. (Ar)mSi(OH)n??(A) In the formula, m is 2 or 3, and the sum of m and n is 4. Ar represents an optionally-substituted aryl group.

Abstract: The invention relates to a method for producing polyurethane foams using ingredients containing at least one expanding agent consisting of halogen-containing (fluorine-containing) olefins and at least a siloxane having formula (I).

Abstract: A method for manufacturing a polishing pad made from a polyurethane resin foam having very uniform, fine cells therein and a polishing pad obtained by that method provides a polishing pad having better polishing characteristics (especially, in planarization) while providing improved dressability while maintaining the planarization characteristics and polishing speed of a conventional polishing pad. The polyurethane resin foam is a cured product obtained by reacting an isocyanate-terminated prepolymer with an aromatic polyamine chain extender having a melting point of 70° C. or lower, for example.

Abstract: A biodegradable two-liquid type foaming composition, which comprises main liquid and auxiliary liquid, is disclosed. The main liquid is formed by mixing polylactic acid powder, polycaprolactone polyol and foaming agent. The auxiliary liquid is formed by mixing polyol and isocyanate. Once the main liquid and the auxiliary liquid are mixed, the foaming reaction proceeds and the biodegradable foam is formed.