Abstract: The present disclosure relates to the production of molded products containing recycled content, and more particularly polyurethane foam which includes polyol recovered from chemical recycling of polyurethane foam scrap, which polyol has been treated to optimize viscosity and/or reactivity characteristics.

Abstract: The present disclosure relates to the production of molded products containing recycled content, and more particularly polyurethane foam which includes polyol recovered from chemical recycling of polyurethane foam scrap, which polyol has been treated to optimize viscosity and/or reactivity characteristics.

Abstract: A solvent that reversibly converts from a hydrophobic liquid form to hydrophilic liquid form upon contact with water and a selected trigger, e.g., contact with CO2, is described. The hydrophilic liquid form is readily converted back to the hydrophobic liquid form and water. The hydrophobic liquid is an amidine or amine. The hydrophilic liquid form comprises an amidinium salt or an ammonium salt.

Abstract: Methods for the purification of ethylene vinyl alcohol copolymers are provided.

Abstract: A surfacing composition made of recycled paint, which requires no priming, has a non-reflective “flat” appearance, and is partially composed of dried paint. The composition provides a useful application for used or excess household paint, which would otherwise require special methods of disposal and potentially create future toxic cleanup problems. The composition is made of granular dried paint and a water-based sealer, which can be spread on a surface to repair imperfections. The surface can then be finished, and no priming is required. Due to the composition's flat appearance, the patch does not display any characteristic sheen where the repair has been made. The composition provides a simple means of recycling paint, and provides a simple and inexpensive means of repairing imperfections in walls and other surfaces while saving the step of priming the patch before painting or repainting.

Abstract: The present invention provides energetically and economically efficient methods for separating polyamide polymer(s) from commingled materials. The methods generally involve precipitating a polyamide polymer dissolved in a solvent (e.g., formic acid) using dimethyl ether (DME) as an antisolvent. The methods comprise dissolving the polyamide polymer in a solvent that (i) selectively dissolves the polyamide polymer relative to the other materials and (ii) has a higher solubility for DME relative to the polyamide polymer; and then contacting the mixture of the solvent with the dissolved polyamide polymer with DME, thereby precipitating the polyamide polymer.

Abstract: The present invention relates to a preparing method of polyols, polyurethane and polyurethane foams using the same. Polyester, polyamide and polyurethane are depolymerized with the polymeric fatty acid mono(polyhydroxyl alcohol)ide composition and additionally reacted with the polybasic acid, polyol and amine to prepare acid value of 05-˜1 mgKOH/g, hydroxyl value of 10˜500 mgKOH/g, and amine value of 1˜50 mgKOH/g in polyol. This is to transform the double bond of the unsaturated fatty acid from the component of the oils and fats into a conjugated double bond to induce the Diels-Alder reaction, and with the improvement of the reactivity to form a stable combination in the chemical structure to prevent the separate leaching appearance of fat and fatty oil from the final product. In particular, by recycling waste edible oil and waste synthetic resin that can be employed as industrially useful material, the invention provides environment advantages.

Abstract: Color is removed from polymeric material by a method which comprises contacting a dyed or pigmented polymer composition with a non-aqueous extraction solvent comprising a nitrogen containing organic base, an ammonium salt and an alkanol. The present method is readily applied to a process for recycling colored polyamide substrates such as dyed nylon fiber.

Abstract: A method of recycling waste plastic foam materials firstly is to smash a waste material including polyurethane foam into fine particles so as to obtain a first starting material. The first starting material is then crisped and followingly milled into powder so as to obtain a second starting material. The second starting material is then placed into a mixer to mix with a first foaming reaction solution including polyol, catalyst and additives injected into the mixer so as to form a semi-treated foaming material. And then, the semi-treated foaming material is mixed with a second foaming reaction solution including diisocyanate injected into the mixer so as to obtain a completed-treated foaming material. Lastly, the completed-treated foaming material is poured into a mold and then water vapor is uniformly introduced into the mold so as to induce the completed-treated foaming material to proceed foaming reaction.

Abstract: A process is described for recycling superabsorbent polymer fines into a process that includes treating the superabsorbent polymer fines with caustic and a polymerization step for making the superabsorbent polymer gel. The process requires treating the superabsorbent polymer fines with a caustic, followed by mixture with polymerizable monomer solution, and polymerizing the mixture of the superabsorbent polymer fines and monomer to form the aqueous fluid absorbent polymer. In the process, the fines are incorporated into the new polymer gel and become indistinguishable there from. The gel may then be comminuted into a particulate dried and then separated into a portion having a desired minimum particle size in a fines portion having less than the desired size. The particulate may then be coated with a surface crosslinking agent and surface additives and heated for surface conversion.

Abstract: A pulverized thermoplastic resin product such as a pulverized thermoplastic product containing a black pigment, a mixture of a pulverized thermoplastic product containing a colored pigment and a pulverized thermoplastic product containing a colored pigment, or a pulverized thermoplastic product containing two or more different colored pigments can be converted into colored reclaimed resin particles by a method comprising the steps of mixing the pulverized resin product with a white pigment and a black pigment, melting the resulting mixture, and converting the molten mixture into solid particles. The colored reclaimed resin products can be utilized in various field.

Abstract: A process is described for splitting polyurethanes and polyurethaneureas, in which the polymer is first reacted with gaseous or liquid secondary aliphatic or cycloaliphatic amines, the secondary urea formed, after removal with hydrogen chloride, is split to the isocyanate, and the polyols or polyamines also formed in the reaction are worked up and purified. It is possible by the process according to the invention to work up polyurethanes, polyurethaneureas, etc., of any origin, and to break them down into the starting materials, specifically the isocyanates, polyols or polyamines, to form starting materials in very high quality, which can be reused for the synthesis of any polyurethanes or polyureas. The invention further provides for the preparation of secondary bis-ureas from polyurethanes or polyurethaneureas or/and ureas.

Abstract: Recycled resin is produced by a method including a dismantling/recovery step of dismantling products containing resin moldings and recovering the resin moldings, a removal step of removing unwanted matter including metal components from the resin moldings, a sorting step of discriminating the materials of the resin moldings, and a crushing step of crushing the resin moldings. The method further includes, prior to the crushing step, detecting the metal components, and, after the crushing step, separating out and thus removing metal remaining in crushed material.

Abstract: The invention relates to a method for the treatment of waste containing polyamide comprising a) depolymerisation of the waste containing polyamide, whereby a caprolactam raw material (6) and a flow (3), comprising the secondary constituents and additives from the depolymerisation, are obtained, and b) leaching of the flow (3) at least once using an extracting agent.

Abstract: The present invention relates to a recycling method of a mixed waste of polyester and polyamide (hereinafter, referred to as “mixed waste”) in which polyesters including polyethylene terephthalate and polyamides are inseparable from one another. In accordance with the recycling method of the present invention, it is possible to prepare a solid block polymer having an acid value of 1 to 150 mgKOH/g, a weight average molecular weight of 3,000 to 50,000 and a softening point of 10 to 150° C., or a liquid polyester-amide block polymer composition having good compatibility, solubility and dispersibility. In addition, the polymer having an acid value of more than 20 mgKOH/g is reacted with a basic compound to form a neutralized salt which is then used to prepare a water-soluble polyester-amide block polymer composition.

Abstract: A method of decomposing a thermosetting resin by a decomposer comprising the steps of: pre-heating the thermosetting resin up to a pre-heating temperature T0; kneading the pre-heated thermosetting resin together with a decomposer, and concurrently heating a mixture comprising the thermosetting resin and the decomposer up to a kneading temperature T1, thereby allowing a reaction to take place between the decomposer and the thermosetting resin to obtain a kneaded matter wherein the decomposer becomes consumed; and heating the kneaded matter to a maximum temperature T2 to thereby decompose the thermosetting resin; wherein the preheating temperature T0 is not higher than the boiling temperature of the decomposer; the kneading temperature T1 is not lower than the pre-heating temperature T0 but is lower than the thermal decomposition temperature of the thermosetting resin; the maximum temperature T2 is lower than the decomposition temperature of the thermosetting resin; and the pre-heating of the thermosetting resi

Abstract: Process for recycling a plastic, according to which the plastic is brought into contact with a solvent capable of dissolving the same and the plastic dissolved in the solvent is precipitated using a non-solvent in the presence of a phase-separating agent, in which the phase-separating agent is compatible with the solvent and incompatible with the non-solvent, and is also present when the plastic is brought into contact with the solvent, and improves the dissolution of the plastic by the solvent.

Abstract: Provided is a method for accelerating the biodegradation of aliphatic-aromatic co-polyesters comprising greater than 60 mol percent aromatic acid, based on total diacid in the co-polyester. The method involves contacting at least one hydrolytic enzyme in aqueous solution to the co-polyester.

Abstract: A method of depolymerizing a polymer comprises contacting a polymer with a fluid comprising carbon dioxide and at least one component, wherein the fluid plasticizes the polymer and facilitates penetration of the component into the polymer to depolymerize the polymer and form oligomeric units, monomeric units, or combinations thereof.

Abstract: The invention relates to methods for processing floor coverings (100), such as carpet and/or carpet tile, having at least one layer containing a polyurethane (104), such that at least this polyurethane—containing layer (104) can be recycled and reused. The method involves contacting the floor covering (100) with an organic polyol (110) and heating (120) it, so that the polyurethane—containing layer (104) softens and/or partially liquefies, but can be resolidified by contact with additional polyisocyanate (140).

Abstract: The present invention provides a method of manufacturing a rigid polyurethane foam material, a method of manufacturing a refrigerator using the material, and a refrigerator manufactured by the same method. The method includes recovering highly purified rigid polyurethane foam from a scrapped refrigerator, and decomposing the rigid polyurethane foam for recycling. The method includes steps of: shredding a scrapped refrigerator containing rigid polyurethane foam in order to separate rigid polyurethane foam lumps; grinding the rigid polyurethane foam lumps into a rigid polyurethane foam powder; liquefying the rigid polyurethane foam powder by either aminolysis reaction or glycolysis reaction; reacting thus obtained liquefied rigid polyurethane foam powder and supercritical/sub-critical water in order to decompose the rigid polyurethane foam powder into a crude material; and fractionating the crude material to obtain a raw material of rigid polyurethane foam.

Abstract: A process of chemically recycling polyurethane-containing scrap. Polyurethane-containing scrap is subjected to a chemolysis reaction to produce chemolysis polyol products. The chemolysis polyol products are used as initiators in a reaction with alkylene oxide to produce oxyalkylated polyols for preparing polyurethanes.

Abstract: Thermosetting paint film is removed by adding plastic resin coated with thermosetting paint film into a mixed solution of an alcoholic solvent and alkali and heating this mixed solution while stirring. Isopropyl alcohol, phenoxy alcohol and alkali are added in a reactor and heated to a temperature of 50-70° C. while stirring. Plastic resin coated with thermosetting paint film is added and a reaction is performed while maintaining the temperature. The isopropyl alcohol and phenoxy alcohol are added in a mixed ratio of 70-90:30-10.

Abstract: The present invention provides a method of manufacturing a rigid polyurethane foam material, a method of manufacturing a refrigerator using the material, and a refrigerator manufactured by the same method. The method includes recovering highly purified rigid polyurethane foam from a scrapped refrigerator, and decomposing the rigid polyurethane foam for recycling. The method includes steps of: shredding a scrapped refrigerator containing rigid polyurethane foam in order to separate rigid polyurethane foam lumps; grinding the rigid polyurethane foam lumps into a rigid polyurethane foam powder; liquefying the rigid polyurethane foam powder by either aminolysis reaction or glycolysis reaction; reacting thus obtained liquefied rigid polyurethane foam powder and supercritical/sub-critical water in order to decompose the rigid polyurethane foam powder into a crude material; and fractionating the crude material to obtain a raw material of rigid polyurethane foam.

Abstract: A method of recovering a decomposition product from a polyurethane, the method comprising the steps of thermally decomposing a polyurethane into a liquid containing a polyol and a urea compound which is soluble in the polyol, and solids containing a urea compound which is insoluble in the liquid in the presence of a polyamine compound at a temperature of 120 to 250° C.; removing the solids; hydrolyzing the residue with water retained at a high temperature of 200 to 320° C. and a high pressure; and recovering the resulting polyamine and/or polyol.

Abstract: The present invention provides a method of recovering a polyamine compound and/or a polyol compound useful for starting materials of polyurethane resin in an industrially advantageous manner by first dissolving the polyurethane resin such as polyurethane foams discharged in a large amount as industrial wastes in a solubilizing agent containing a polyamine compound, a low molecular glycol or an amino alcohol, hydrolyzing the resulting solution with liquid water at 200 to 320° C., then recovering the polyamino compound and/or polyol compound thus formed.

Abstract: A process of chemically recycling polyurethane-containing scrap. Polyurethane-containing scrap is subjected to a chemolysis reaction to produce chemolysis polyol products. The chemolysis polyol products are used as initiators in a reaction with alkylene oxide to produce oxyalkylated polyols for preparing polyurethanes.

Abstract: The present invention relates to coating composition, which is suitable for preparing light fast coatings and contains a cosolvent-free, aqueous, anionic dispersion of polyurethane-ureas, the solids content of which contains the reaction product, present at least partially in salt form, of a) an NCO prepolymer prepared from i) an aliphatic and/or cycloaliphatic diisocyanate, ii) a macrodiol having a number average molecular weight of 500 to 10,000 iii) a 2,2-bis-(hydroxymethyl)alkane monocarboxylic acid and iv) a diol having a molecular weight of 62 to 400, with b) optionally a diamine, c) a monofunctional chain terminating agent, d) water and e) a neutralizing agent, provided that the NCO content of the prepolymer is up to 25% lower than the theoretical value, the entire polyurethane-urea synthesis reaction is performed in the homogeneous phase and no cosolvent having a boiling range of greater than 100° C. is used during the preparation of the dispersion of polyurethane-ureas.