Abstract: A method for preparing contaminated plastics ground into flakes, such as RPET or such polymers, having at least decontamination and SSP treatment steps, with at least one reactor, with heating to the process temperature taking place essentially outside the reactor. Also, a device for carrying out the method, and having at least one decontamination reactor and at least one SSP reactor, a device for heating plastic flakes to the process temperature being arranged upstream of the decontamination reactor. Also an SSP reactor having at least two individual reactors, and preferably between 3 and 7 individual reactors.

Abstract: Described as one aspect of the invention are extrusion blow molded articles comprising at least one polyester which comprises: (a) a dicarboxylic acid component comprising: (i) about 90 to about 100 mole % of terephthalic acid residues; (ii) about 0 to about 10 mole % of aromatic and/or aliphatic dicarboxylic acid residues having up to 20 carbon atoms; and (b) a glycol component comprising: (i) about 42 to about 60 mole % ethylene glycol residues; and (ii) about 40 to about 58 mole % residues of 1,4-cyclohexanedimethanol; wherein the total mole % of the dicarboxylic acid component is 100 mole %, and wherein the total mole % of the glycol component is 100 mole %; and wherein the inherent viscosity of the polyester is from 0.50 to 1.0 dL/g as determined in 60/40 (wt/wt) phenol/tetrachloroethane at a concentration of 0.25 g/50 ml at 25° C.

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: A method for processing polyester wastes, especially used polyester bottles, which comprises shredding, washing, drying and melting the waste mixture to obtain a starting raw material wherein a modifying agent selected from the group comprising a combination of polysiloxane and a plasticizer selected from the group of phthalates, or a combination of silazanes and silanes is added to the shredded and dried waste mixture, the amount of the modifying agent being 4 to 6% by weight, based on the waste mixture.

Abstract: The synthetic resin having ester bond in the composition structure is subjected to the hydrolysis treatment to reclaim the raw material component before polymerization. Provided is a method for decomposing and reclaiming a synthetic resin having ester bond in the composition structure thereof, executing the hydrolysis treatment and the separation collection treatment in this order. The hydrolysis treatment is a treatment in which an article to be treated containing a synthetic resin to be decomposed and reclaimed is exposed to a water vapor atmosphere filled at or below the saturation water vapor pressure at a treatment temperature specified by the condition of treatment temperature of at or below the melting point of the synthetic resin, and the synthetic resin in the article to be treated is hydrolyzed by the water vapor generated at the treatment temperature, thus a decomposition product before polymerizing to the synthetic resin containing ester bond in the composition structure thereof is generated.

Abstract: A process for decontaminating recycled polyethylene terephthalate (RPET) is disclosed, the process involves determining an accumulated thermal history (ATH) of the RPET, including the thermal history of any process steps performed by a subsequent possessor of the RPET, to result in an optimized decontamination process for decontaminating the RPET to a desired level.

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 process for producing a synthetic fiber composition with reclaimed post consumer carpet yam, wherein face yam is shaved from post consumer carpet using a shaving device to provide shaved face yam, the shaved face yam is reduced in size, contaminants are removed using mechanical screeners, the shave face yam is melt filtered, and then fiber spun.

Abstract: A method for processing polyester wastes, especially used polyester bottles, which comprises shredding, washing, drying and melting the waste mixture to obtain a starting raw material wherein a modifying agent selected from the group comprising a combination of polysiloxane and a plasticizer selected from the group of phthalates, or a combination of silazanes and silanes is added to the shredded and dried waste mixture, the amount of the modifying agent being 4 to 6% by weight, based on the waste mixture.

Abstract: A through process comprising depolymerization reaction of used PET bottles with EG, recovering DMT by ester interchange reaction with MeOH, obtaining terephthalic acid by hydrolysis of the recovered DMT, and manufacturing a PET polymer which can be used for manufacturing PET bottles again by using the terephthalic acid.

Abstract: A recycled plastic material is made from laser-engraved thermoplastic, metal-containing thermoplastic, thermoplastic used in an inkjet apparatus, or thermoplastic to which an ink or its composition have stuck. This recycled plastic material is manufactured by pulverizing any of these thermoplastics, cleaning the pulverized thermoplastic, removing a cleaning solution from the cleaned thermoplastic to dry it, and removing the dried thermoplastic solid matter other than the thermoplastic.

Abstract: An object of the present invention is to provide a method of producing a solution of a thermoplastic polymer such as a polyester resin and/or a solution of a depolymerization product of a thermoplastic polymer by efficiently dissolving the thermoplastic polymer and/or the depolymerization product of the thermoplastic polymer. The method of producing a solution of a thermoplastic polymer and/or a solution of a depolymerization product of a thermoplastic polymer, which includes supplying a thermoplastic polymer, in a melted state, from a raw material supply port to an interior of a reactor, discharging the polymer through holes of a perforated plate, and then bringing the polymer into contact with a solvent vapor while flowing down along the surface of a support disposed inside the reactor.

Abstract: The invention relates to methods of using polymers in the waste stream obtained from the production of powder coat. The polymer in the waste stream can be cured with that in another waste stream or with a virgin polymer.

Abstract: Disclosed is a method for recycling a recovered polycondensation polymer which comprises a process wherein a recovered polycondensation polymer is supplied in a molten state to a polymerizer having a porous plate, and then after ejecting the polycondensation polymer through pores of the porous plate, the polymerization degree of the polycondensation polymer is increased under a reduced pressure or in a reduced inert gas atmosphere while dropping the polycondensation polymer along a supporting body.

Abstract: The present invention provides a process for the preparation of high molecular weight crystalline Polyethyleneterephthalate (PET) using up to 50% of Post consumer recycled PET flakes along with Pure Terephthalic Acid (PTA), Isophthalic Acid (IPA) and Mono Ethylene Glycol (MEG) as a virgin raw material, in the presence of a combination of catalysts and additives to obtain an intermediate prepolymer heel having a low degree of polymerization further subjecting to autoclaving to yield an amorphous melt and followed by solid state polymerization.

Abstract: A composite material produced from carpet waste and a binding agent, in intimate association, which material includes 25% and 99% carpet waste and between 1 and 25% binding agent. A method for manufacturing the composite material is also disclosed.

Abstract: A process for removing contaminants from PET components by mixing ethanediol with the PET feedstock at a temperature about the boiling point of ethanediol and for a time sufficient to convert the polyethylene terephthate components to polyethylene terephthate polymers which are soluble in the ethanediol and form bis(hydroxyethyl)terephthalate and produce a product mixture thereof containing insoluble materials. The soluble polyethylene terephthate polymers, bis(hydroxyethyl)terephthalate and ethanediol are recovered from the product mixture.

Abstract: A method is disclosed for efficiently obtaining BHET of high purity from an EG (ethylene glycol) solution containing crude BHET (bis(2-hydroxyethyl)terephthalate), especially a decomposition product solution obtained by decomposing a polyester containing PET (polyethylene terephthalate) as a main component, by use of EG, while minimizing by-production of impurity components such as DEG (diethylene glycol), DEG ester and oligomers. The decomposition product solution is subjected to crystallization and solid-liquid separation under specific temperature conditions. Further, in accordance with the invention, a method of purifying BHET is taught which comprises evaporation steps of evaporating low-boiling-point components from the decomposition product solution under specific conditions so as to obtain a melt solution and a molecular distillation step of distilling the obtained melt solution under specific conditions so as to obtain a specific fraction.

Abstract: The present invention provides a dissolution method for saturated polyester capable of recycling saturated polyester used in fibers, a film, a bottle and others with ease and a low cost, a solution decomposing saturated polyester and a decomposition method using the solution.

Abstract: The present invention is a process for recycling colored polyester. More specifically, colored polyester for recycling is depolymerized by the addition of glycol to form the monomer BHET. The BHET is contacted with activated carbon to remove some colorant. The remaining colorant is extracted with water, alcohol, or glycol to produce white, purified BHET. The white, purified BHET is separated from the extraction solvent (water, alcohol, or glycol) by filtering, decanting, or centrifuging, for example. The purified BHET monomer can be polymerized to polyethylene terephthalate meeting food contact specifications, using known polymerization processes.

Abstract: The present invention relates to a method for the recycling waste polyester resins and the reclaimed materials therefrom. The method for recycling waste polyester resins according to one embodiment the present invention comprises (a) depolymerizing waste polyester resin; (b) polycondensing the depolymerized product from step (a) with a polyhydric alcohol to provide a polyester polymer having an acid value of 10–150 mgKOH/g; and (c) recovering the polyester polymer in solid or liquid form if the polyester polymer from step (b) has an acid value of more than 20 mgKOH/g or recovering the polyester polymer in solid form if the polyester polymer from step (b) has an acid value of less than 20 mgkOH/g. The reclaimed polyester resin according to the present invention has the excellent compatibility, dispersibility, and adhesive property for various media, and can be used easily neutralized and dissolved in water. Accordingly, the polyester resin can be used as a useful material for industrial products.

Abstract: A method of treating waste product containing flexible polyurethane resin includes adding a decomposing agent to the waste product to start a decomposition reaction; and terminating the decomposition reaction at a stage in which a diamine concentration derived from an isocyanate raw material of the flexible polyurethane resin is 2 wt % or lower to obtain a pasty intermediate product.

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: The invention relates to a method for reclaiming polyesters or polyester mixtures from polyester or waste containing polyester. The aim of the invention is to reclaim polyesters or polyester mixtures of good quality in a cost-effective manner. To achieve this aim, the polyester and/or waste containing polyester is heated in a bath of dicarboxylic acid dialkyl ester to temperatures in excess of 150° C. In this process, polyester is dissolved in the dicarboxylic acid dialkyl ester or a dicarboxylic acid dialkyl ester mixture and subsequently extracted from the solution by means of solid-liquid separation.

Abstract: Process for recycling an article based on at least one vinyl chloride or vinylidene chloride polymer, according to which: (a) the article is cut up into fragments with a mean size of 1 cm to 50 cm in the case where it would exceed these sizes; (b) the article fragments are brought into contact with an azeotropic or quasiazeotropic mixture of water and of a solvent capable of dissolving the polymer, at a temperature of at least 120° C.; (c) the polymer dissolved in the solvent is precipitated by a reduction in pressure and by injection of steam into the solution thus obtained, which additionally results in the entrainment of the solvent-water azeotrope and thus leaves a mixture remaining which is essentially composed of water and of solid polymer particles; (d) the polymer particles are collected.

Abstract: The overall performance of water-reducible polymer dispersions, more specifically alkyd dispersions, can be substantially improved by utilizing resins derived from acidolysis reaction products of polyalkylene terephthalates and polyalkylene naphthalates. According to this invention, polymer dispersions can be produced from low acid value polymers and yet have good water dispersibility. When an aqueous coating composition is formulated using the dispersion of this invention, a final coating is formed that has good hydrolytic stability, and when blended with a latex, exhibits improved gloss and wet adhesion.

Abstract: The invention provides a shell material for recording media comprising an alloy between an acrylonitrile-butadiene-styrene resin and recovery polyethylene terephthalate, the content of recovery polyethylene terephthalate in the total amount of the alloy being in the range of 5 to 80% by mass. The invention also provides a shell material for recording media comprising an alloy between an acrylonitrile-butadiene-styrene resin and recovery polyethylene terephthalate and having a window part. The content of recovery polyethylene terephthalate in the total amount of the alloy is in the range of 5 to 80% by mass, and the window part comprises the polyethylene terephthalate resin, a polycarbonate resin or a polyphenylene ether resin as a constituting material.

Abstract: A dimethyl terephthalate composition includes 0.001 to 200 ppm of methyl 4-(1,3-dioxolan-2-yl)benzoate and 0 to 1 ppm of dimethyl hydroxyterephthalate contained in dimethyl terephthalate, and exhibits improved properties as a material for producing polyester.

Abstract: The present invention is directed to a process for separating polyester, and particularly polyethylene terephthalate, from various contaminants and impurities. In general, the process includes the steps of mixing materials containing polyester with an alkaline composition in a mixer. The mixer imparts sufficient energy to the slurry to provide substantially complete, even coating of the polyester containing materials with the alkaline composition and cause saponification of the outer surface of the polyester with the alkaline composition. After reaction in the mixer, the mixture is heated causing some of the impurities to be chemically modified into a more separable form. After heating, the mixture can be washed with water and the polyester can be easily separated from the remaining impurities. Through the process of the present invention, polyester can be separated and recovered from waste materials such as those containing polyvinyl chloride and aluminum.

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 regenerated resin composition comprising (I) a molded article pulverized material (Component A) that satisfies conditions (1) that the molded article pulverized material is a pulverized material of a molded article having an aromatic polycarbonate resin content of 30 to 98% by weight, (2) that the pulverized material has a viscosity average molecular weight of 17,000 to 30,000, and (3) that the pulverized material has a wet heat retention ratio of at least 60%, and (II) an aromatic polycarbonate resin (Component B). According to the present invention, there is provided a regenerated resin composition that comprises a pulverized material from a molded article made of an aromatic polycarbonate resin and that is excellent in the property of retaining physical properties for a long period of time and excellent in mechanical strength.

Abstract: The present invention is a process for regenerating a used resin and prevents deterioration in the quality of the resin by adding to the used resin an another resin having given physical properties superior to those of the used resin and then regenerating the resin.

Abstract: The invention relates to an apparatus for cleaning and/or decontaminating polyester, in particular polyethylene terephthalate (PET). The apparatus has an at least partially heated rotary tubular furnace to be fed with a mixture of polyester and an alkaline material and is for carrying out a saponification reaction in the mixture. The invention is distinguished in that within the rotary tubular furnace a weir is disposed which at least partly closes the interior of the rotary tubular furnace.

Abstract: Fiber reinforced composite plastic materials for use in injection and compression molding and extrusion processing produced from waste materials, the composite material includes an effective amount of high melting point polymer fiber material and a sufficient amount of low melting point plastic material to coat and bind the high melting point fiber material together and method of producing same.

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 present invention provides production processes of aqueous alkyd resin dispersions, said processes comprising a step of synthesizing alkyd resin by dissolving polyester resin whose chief component is terephthalic acid and which has been recovered from waste materials and regenerated, in a mixture of an alcoholic component, fatty acid and/or oil and fat, and polybasic acid component, said alcoholic component containing tri- or lower polyhydric alcohol and tetra- or higher hydric alcohol at a weight ratio of the former/latter within a range of 0-20, to effect depolymerizaiton and concurrently, esterification reaction; if necessary a step of introducing acid radicals into the resin; and a step of neutralizing and/or dispersing with use of surfactant, the so obtained alkyd resin in water. According to the processes of the present invention, aqueous alkyd resin dispersions can be prepared within a short time, using polyester resin which has been recovered from waste materials and regenerated.

Abstract: An ester-forming monomer obtained by depolymerization of polytrimethylene terephthalate and having an acrolein content of no greater than 0.5 wt %. Polymers obtained using the monomer and fibers, films and molded articles comprising the polymers. The ester-forming monomer is obtained by reacting polytrimethylene terephthalate with at least one compound selected from among monoalcohols, 1,3-propanediol and water in the presence of a basic substance. When the recovered ester-forming monomer is used as the starting material for production of a polymer, it is possible to produce a molding polymer for fibers, films and the like with quality equivalent to or higher than that obtained using virgin monomer.

Abstract: In a process for upgrading cleaned used plastic material to be reclaimed, all steps are performed in a continuous way so as to extrude continuously the plastic material to provide elongated strands thereof, cutting the strands continuously as they are supplied by extrusion to convert them into pellets. Then, the pellets are fed without any intermediate storage to a continuous crystallizer in a stream of hot gas to heat the pellets to crystallizing temperature.

Abstract: Method and device for reprocessing a thermoplastic polycondensate, in particular for the recycling of thermoplastic polycondensates, such as polyethylene terephthalate, polyester or polyamide is provided. The polycondensate is introduced into an extruder in a solid state. The polycondensate is then heated to a temperature below melting temperature and degassed or dried at below atmospheric pressure or with an inert gas added. Preferably, to prevent the polycondensate flakes from escaping through a degassing opening, a conveying device is used to convey the escaping flakes back into the extruder. The dried flakes are then melted.

Abstract: Compositions, apparatus and methods of the present invention concern the manufacturing parts that remain strong and dimensionally stable after exposure to e-coat painting conditions. Such manufacturing includes providing a molding compound having about 55-65% by weight polyethylene terephthalate content, about 35-45% by weight filler content, and optionally about 1% by weight blowing agent content. When an injection molding machine is provided, the molding compound can be fed into the injection molding machine to form a raw part. The raw part can then be removed from the injection mold and quenched in a quenching bath to produce a hardened part. The hardened part can then be secured to a partially assembled vehicle. The hardened part, along with the rest of the partially assembled vehicle can then be electro-coated, painted, and baked to produce a final vehicle or sub-assembly thereof.

Abstract: This invention discloses a process for producing a polyester resin, which is transparent, substantially free of occurrence of foreign matters or filtration residue, and is subject to no problem in physical properties, within short time, by concurrently reacting polyester whose chief starting material is terephthalic acid and which has been recovered from waste materials and regenerated; a polyhydric alcohol component and a polybasic acid component, at such ratios that the regenerated polyester occupies 10-80% by weight based on the total weight of the regenerated polyester, polyhydric alcohol component and polybasic acid component.

Abstract: Within a process for recycling of PET-material and/or objects of PET, the PET-material to be processed is heated and dried in the course of a pre-treatment step and simultaneously is crystallized at elevated temperature. This pre-treatment step is followed by a main-treatment step under vacuum. In this main-treatment step, the processed material is again dried and crystallized at a temperature that is higher than the temperature of the pre-treatment step. Preferably, also in the main-treatment step no plasticizing of the material takes place; the plasticizing or, respectively, melting of the material takes place only after the main-processing step. An apparatus for performing this process comprises a pre-processing device (3) in which the processed material is dried and simultaneously crystallized at elevated temperature, and, if desired, is also comminuted.

Abstract: Described are methacrylate or acrylate binders e.g. obtainable by the steps of (i) generating OH-precursors from at least one aromatic polyester, and (ii) reacting said OH-precursors of step (i) with methacrylic acid and/or acrylic acid to form a respective ester, whereby step (i) comprises reacting an aromatic polyester, or a mixture of aromatic polyesters with at least one polyol and/or at least one aminopolyol to generate hydroxy terminated oligomers. Optionally, a modified product can be obtained by performing a further reaction in step (i), namely by reacting said hydroxy terminated oligomer with at least one polycarboxylic acid and/or at least one polycarboxylic anhydride to generate said hydroxy terminated binder precursor oligomer.

Abstract: The present invention provides a decomposition treatment liquid for a cured unsaturated polyester resin, comprising a phosphoric acid-type compound or salt thereof and an organic solvent as essential components. By using the treatment liquid of the invention, a cured unsaturated polyester resin can be easily decomposed or dissolved.

Abstract: There is provided a method for deionizing a decomposition produced solution resulting from decomposition of a polyester by ethylene glycol.

Abstract: Fiber reinforced recycled thermoplastic composites and methods for their manufacture are presented. In a preferred embodiment, the thermoplastic composite incorporates a matrix of recycled thermoplastic and a plurality of high modulus, reinforcing fibers, with the recycled thermoplastic including polyethylene, polypropylene, nylon, PET and styrene-butadiene rubber, and the reinforcing fibers including glass fibers, natural fibers, carbon fibers, and aramid fibers. Preferably, each of the reinforcing fibers has a minimum length of approximately ½ of an inch and a modulus of approximately one million psi.

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: There is provided a method for recovering energy from glass windshields removed from vehicles which comprises the step of separating a polyvinyl butyral polymer from the glass in a windshield and using the recovered polyvinyl butyral polymer as a fuel to replace a fossil fuel in an energy creating plant or alternatively to use the polyvinyl butyral polymer as an adhesive.

Abstract: A process for preparing an RPET polymer blend component comprises providing a quantity of RPET flakes, comminuting the RPET flakes to prepare RPET particles having an average mean particle size from about 500 microns to about 5 microns, adding at least one specialty additive to the RPET particles, and mixing the RPET particles and specialty additive, to prepare a homogeneous blend of RPET carrier and specialty additive.