Abstract: A method for processing a polyalkylene benzenedicarboxylate material includes subjecting a polyalkylene benzenedicarboxylate material to an immersion treatment with an immersion liquid including ethylene glycol, so as to obtain an immersed polyester material, and subjecting the immersed polyester material to a disintegration treatment to obtain a disintegrated polyester material. The immersed polyester material has crystallinity higher than that of the polyalkylene benzenedicarboxylate material.

Abstract: Methods for recycling post-consume polyester-based fabric materials such as hospital linens. The methods include decontaminating a post-consumer polyethylene terephthalate (PET) product and polymerizing the decontaminated PET product via solid state polymerization to generate a polymerized PET product. The post-consumer PET product can comprise a polyester-based fabric.

Abstract: A process is provided of treating a feed comprising polyethylene terephthalate comprising dissolving said feed in a polar solvent at a temperature between about 100 to 250° C. to produce a dissolved feed; then adding an anti-solvent that is less polar than said polar solvent followed by cooling a resulting mixture resulting in precipitation of purified polyethylene terephthalate and then separation of solid purified polyethylene terephthalate from remaining liquids.

Abstract: A continuous flow process and system for depolymerizing plastic. A heterogeneous mixture of solid plastic particles, a solvent, and a catalyst are pumped continuously through a heating zone at a flow rate resulting in a particle speed sufficient to keep the plastic particles in suspension. The heterogeneous mixture is heated in the heating zone and maintained in a hold zone to complete depolymerization of the mixture into a homogeneous solution containing a liquefied reaction product. The homogeneous solution is cooled to solidify and precipitate a solid reaction product. The solid reaction product is separated from the solvent to be recycled. Contaminants are removed from the solvent, and the solvent is recirculated for use as a constituent of the heterogeneous mixture.

Abstract: A process and a system for continuously depolymerizing plastic is disclosed. The system may comprise a mixer for producing a heterogeneous reaction mixture comprising plastic particles and a solvent, a pump for transmitting the reaction mixture at a particle speed sufficient to maintain the plastic particles in suspension in the solvent, a heating apparatus for heating the reaction mixture to its reaction temperature, a hold tube for maintaining the reaction mixture at or above the reaction temperature to facilitate conversion into a homogeneous reaction solution, and a settling tank to allow a solid reaction product to precipitate from the homogeneous reaction solution once cooled.

Abstract: Methods for recycling post-consume polyester-based fabric materials such as hospital linens. The methods include decontaminating a post-consumer polyethylene terephthalate (PET) product and polymerizing the decontaminated PET product via solid state polymerization to generate a polymerized PET product. The post-consumer PET product may include a polyester-based fabric. The post-consumer PET product may retain essentially the same shape and form during and after recycling and decontamination as before recycling.

Abstract: The present invention relates to a process for preparing a polyester (meth)acrylate resin (I), said process comprising the steps of: (a) Reacting a thermoplastic polyester with (a1) at least one polyhydric alcohol and, optionally, with (a2) at least one triglyceride, wherein the molar ratio of triglyceride to thermoplastic polyester is between 0 and 0.3, and the molar ratio of polyhydric alcohol to thermoplastic polyester is at most 1.9 to obtain a depolymerization product A that has a hydroxyl number within the range of from 200 to 800 mg KOH/g; (b) Reacting the depolymerization product A with (b1) at least one fatty acid and/or (b2) at least one polybasic carboxylic acid and, optionally, with (b3) at least one polyhydric alcohol to provide a polyester polyol B; (c) Reacting the polyester polyol B with (c) at least one (meth)acrylating compound to provide a (meth)acrylated compound (I), wherein the weight ratio of fatty acid (b1) to the depolymerization product A is between 0 and 0.

Abstract: The present disclosure relates to the formation of dimethyl terephthalate (DMT) and mono ethylene glycol (MEG). The present invention also relates to the depolymerization of polyethylene terephthalate (PET) and the recovery of dimethyl terephthalate (DMT) and mono ethylene glycol (MEG) using sodium methoxide as a catalyst.

Abstract: A treatment plant (1) transforms a material containing PET in flakes (2) into a depolymerized material (3). The plant includes a first treatment unit (10) having a first material inlet (11) for feeding the material containing PET in flakes (2), a first unit outlet (12) for outputting a semi-finished material of molten PET (4). A first unit path (14) extends between the first unit inlet (11) and the first unit outlet (12). A compression and mixing device (20) is arranged along the first unit path (14). An injection device (30) for injecting a treatment liquid (31) leads to an injection point (32) along the first unit path (14).

Abstract: A method for the polycondensation of recycled PET includes the steps of introducing a mass of recycled PET in a reaction chamber, applying heat to the mass of recycled PET introduced in the reaction chamber in order to reach a working temperature and maintain it for a treatment time, and moving the mass of recycled PET during at least part of the heat application step. The method further includes the step of applying vacuum to the reaction chamber during at least part of the heat application step. The heat application occurs by dielectric microwave heating of the mass of recycled PET.

Abstract: A method for recycling polyester from a polyester textile comprises the steps of: providing said polyester textile soaked in a mixture comprising a solvent and a catalyst, providing and maintaining a temperature of said mixture comprising said polyester textile within a range of 80-240° C. during depolymerization of polyester in said polyester textile and wherein, in said step of providing said polyester textile soaked in said mixture, said catalyst of said mixture comprises calcium oxide. A catalyst may be used for depolymerization of polyester in a polyester textile, wherein the catalyst comprises calcium oxide.

Abstract: The present invention relates to a process for preparing a polyester (meth)acrylate resin (I), said process comprising the steps of: (a) Reacting a thermoplastic polyester with (a1) at least one polyhydric alcohol and, optionally, with (a2) at least one triglyceride, wherein the molar ratio of triglyceride to thermoplastic polyester is between 0 and 0.3, and the molar ratio of polyhydric alcohol to thermoplastic polyester is at most 1.9 to obtain a depolymerization product A that has a hydroxyl number within the range of from 200 to 800 mg KOH/g; (b) Reacting the depolymerization product A with (b1) at least one fatty acid and/or (b2) at least one polybasic carboxylic acid and, optionally, with (b3) at least one polyhydric alcohol to provide a polyester polyol B; (c) Reacting the polyester polyol B with (c) at least one (meth)acrylating compound to provide a (meth)acrylated compound (I), wherein the weight ratio of fatty acid (b 1) to the depolymerization product A is between 0 and 0.

Abstract: Various methods of reshaping and recycling thermoset polymers and composites containing thermoset polymers are provided. The methods involve the bond exchange reaction of exchangeable covalent bonds in the polymer matrix with a suitable small molecule solvent in the presence of a catalyst. In some aspects, the methods are applied to a carbon fiber reinforced polymer or a thermoset polymer where the thermoset polymer matrix includes a plurality of ester bonds. Using a small molecule alcohol, the methods provide for recycling one or both of the carbon fiber and the polymer, for welding two surfaces, or for repairing a damaged surface in the materials.

Abstract: The aim is to refine a method of establishing a predetermined viscosity when recycling polyester wastes having inherently different viscosities in such a way that the desired final material has the appropriate viscosity after a fairly short time, and with little energy consumption, and the color of the melt is also to be influenceable.

Abstract: Methods of degrading a polymer into oligomers and/or monomers in a solvent, using a catalyst, and a functionalized magnetic particle comprising a catalyst being capable of degrading the polymer into oligomers and/or monomers are disclosed. The method and particle provide a high selectivity and a high conversion ratio.

Abstract: In one aspect, the invention relates to recycled polyethylene terephthalate compositions, fibers and articles produced therefrom, and methods for producing same. In a further aspect, the invention relates to homogenized post-consumer polyethylene terephthalate. In a further aspect, the invention relates to extruded polymer compositions, polymer mixtures, fibers, and/or Bulked Continuous Filament fibers comprising post-consumer polyethylene terephthalate. In a further aspect, the invention relates to processes for preparing recycled polyethylene terephthalate compositions. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.

Abstract: A method for purifying a reclaimed polymer, such as a polymer reclaimed from post-consumer use or post-industrial use, is disclosed. The method involves obtaining the reclaimed polymer and dissolving it in a solvent at an elevated temperature and pressure to produce a polymer solution, which is purified at an elevated temperature and pressure by contacting the polymer solution with solid media to produce a purer polymer solution. A purer polymer is then separated from the purer polymer solution.

Abstract: A method for purifying reclaimed polyethylene, such as polyethylene reclaimed from post-consumer use or post-industrial use, is disclosed. The method involves obtaining the reclaimed polyethylene and contacting it at an elevated temperature and pressure with a fluid solvent to produce an extracted reclaimed polyethylene. The extracted reclaimed polyethylene is dissolved in a solvent at an elevated temperature and pressure to produce a polyethylene solution, which is purified at an elevated temperature and pressure by contacting the polyethylene solution with solid media to produce a purer polyethylene solution. A purer polyethylene is then separated from the purer polyethylene solution.

Abstract: A method for purifying a reclaimed polymer, such as a polymer reclaimed from post-consumer use or post-industrial use, is disclosed. The method involves obtaining the reclaimed polymer and contacting it at an elevated temperature and pressure with a fluid solvent to produce an extracted reclaimed polymer. The extracted reclaimed polymer is dissolved in a solvent at an elevated temperature and pressure to produce a polymer solution. A polymer is then separated from the polymer solution.

Abstract: The present invention is a method for decomposing a polymer material by chemically decomposing a polymer material containing a first monomer and a second monomer in a mixture of the polymer material with the first monomer or a derivative of the first monomer to produce a chemical raw material. A relationship between a proportion of number of molecules of the second monomer to number of molecules of the first monomer in a reaction system for decomposing the polymer material and the molecular weight of the chemical raw material produced in the reaction system is acquired in advance (S101). Subsequently, an addition mount of the derivative of the first monomer to be added to the polymer material is determined based on the above relationship (S102). The first monomer in the addition amount determined is then mixed with the polymer material (S103).

Abstract: Embodiments of the invention provide a process for processing post-consumer polymer. The polymer is contacted with a control medium having a carrier gas and a reactive vapor. Such a process is useful for processing post-consumer polymers with lower energy and reactants than with liquid reactants, and also promotes decontamination of the recycled polymer during the reaction.

Abstract: Biodegradable compositions containing an aliphatic-aromatic copolyester derived from aromatic polyesters. Methods of making the compositions and articles made from the compositions.

Abstract: The invention relates to a composition comprising (a) from 5 to 99 wt % of a modified polybutylene terephthalate random copolymer that (1) is derived from polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers and (2) has at least one residue derived from the polyethylene terephthalate component, and (b) at least 1 wt % of a filler component. In one embodiment, the invention relates to an article molded from the above-mentioned molding composition. In another embodiment, the invention relates to methods for making and methods for using the molding composition.

Abstract: Disclosed is an improved process for preparing a modified polyalkylene terephthalate by melt polycondensation followed optionally by solid state condensation comprising reacting an alkylene diol and polyethylene terephthalate, wherein polymerization occurs in the presence of a catalyst complex formed by reaction of tetra(alkyl) titanate and a compound selected from phosphorus-containing compounds, nitrogen-containing compounds, boron-containing compounds, and combinations thereof.

Abstract: A process of preparing a modified polyalkylene terephthalate by melt polycondensation comprising reacting an alkylene diol and polyethylene terephthalate, wherein polymerization occurs in the presence of a catalyst complex formed by reaction of tetra(alkyl) titanate and a compound selected from phosphorus-containing compounds, nitrogen-containing compounds, boron-containing compounds, and combinations thereof.

Abstract: The present invention relates to polyesters that can be prepared from renewable resources and/or recycled materials and the production process thereof. In particular, hydroxyl-functional or carboxyl-functional polyesters containing moieties of terephthalic acid and/or isophthalic acid, ethylene glycol, a dianhydrohexitol, and of one or more linear chain dicarboxylic acids are provided. Further, the polyesters have a number average molecular weight, as measured by gel permeation chromatography, of from 400 to 15000 daltons, more preferably from 550 to 15000 daltons. The polyesters of the invention can basically be prepared from recycled polyethylene terephthalate and from renewable polyacids and/or polyols. The present invention further provides a process to produce such polyesters via glycolysis of a polyethylene terepthalate and/or a polyethylene isophthalate with a dianhydrohexitol.

Abstract: A method for forming a biodegradable aliphatic polyester suitable for use in fibers is provided. In one embodiment, for example, an aliphatic polyester is melt blended with an alcohol to initiate an alcoholysis reaction that results in a polyester having one or more hydroxyalkyl or alkyl terminal groups. By selectively controlling the alcoholysis conditions (e.g., alcohol and polymer concentrations, catalysts, temperature, etc.), a modified aliphatic polyester may be achieved that has a molecular weight lower than the starting aliphatic polyester Such lower molecular weight polymers also have the combination of a higher melt flow index and lower apparent viscosity, which is useful in a wide variety of fiber forming applications, such as in the meltblowing of nonwoven webs.

Abstract: Biodegradable compositions containing an aliphatic-aromatic copolyester derived from aromatic polyesters. Methods of making the compositions and articles made from the compositions.

Abstract: A method comprises forming a reaction mixture comprising a terephthalate polyester, a glycol comprising 2 to 5 carbons, and an amidine organocatalyst; and heating the reaction mixture at a temperature of about 120° C. or more to depolymerize the terephthalate polyester, thereby forming a terephthalate reaction product comprising a monomeric dihydroxy terephthalate diester; wherein the terephthalate reaction product contains terephthalate oligomers in an amount less than the amount of terephthalate oligomers that would result from i) substituting the amidine organocatalyst with an equimolar amount of a guanidine catalyst and ii) depolymerizing the terephthalate polyester under otherwise identical reaction conditions.

Abstract: Embodiments relate to a relatively rapid transesterification process including transesterifying condensation polymers such as polyethylene terephthalate (PET), or other polyesters used in commerce, with a modifying monomer mix containing other monomers to manufacture new polymers containing the pre-condensed moieties. The process preferably only involves transesterification as a reaction mechanism. The process preferably produces a rapid buildup of molecular weight and/or polymer uniformity by the high temperature transesterification of the condensation polymer with the modifying monomer mixture. The process can be performed in any suitable vessel including an extrusion line, and it has the advantage of greatly reduced cycle times over currently used condensation polymer utilization processes such as the recycling of PET into other materials.

Abstract: The purpose of the present invention is to provide a method for collecting effective components from polyester fiber waste containing polyalkylene telephthalate as the main component, more specifically to provide a method for separating and removing foreign matters (mainly cotton) contained in polyester fiber waste. The purpose of the invention can be achieved by a method for separating and removing foreign matters from polyester waste, which includes throwing polyester fiber waste that contains polyalkylene telephthalate as the main component and foreign matters other than the polyalkylene telephthalate into a depolymerization reaction tank, subjecting a part or all of the polyester fiber to a depolymerization reaction with alkylene glycol to give a depolymerization reaction liquid, and then continuously or intermittently feeding the liquid to a foreign matter-separating and removing apparatus having specified characteristics.

Abstract: Biodegradable compositions containing an aliphatic-aromatic copolyester derived from aromatic polyesters. Methods of making the compositions through an in situ phosphorus containing titanium based catalyst and articles made from the compositions.

Abstract: Embodiments of the invention provide a process for processing post-consumer polymer. The polymer is contacted with a control medium having a carrier gas and a reactive vapor. Such a process is useful for processing post-consumer polymers with lower energy and reactants than with liquid reactants, and also promotes decontamination of the recycled polymer during the reaction.

Abstract: Embodiments of the invention provide a process for processing post-consumer polymer. The polymer is contacted with a control medium having a carrier gas and a reactive vapor. Such a process is useful for processing post-consumer polymers with lower energy and reactants than with liquid reactants, and also promotes decontamination of the recycled polymer during the reaction.

Abstract: The present invention relates to polyesters that can be prepared from renewable resources and/or recycled materials, to their use and their production process. In particular there are provided hydroxyl-functional or carboxyl-functional polyesters comprising moieties of (e) terephthalic acid and/or isophthalic acid, (f) ethylene glycol, (g) a dianhydrohexitol, and of (h) one or more linear chain dicarboxylic acids; wherein the polyester has a number average molecular weight, as measured by gel permeation chromatography, of from 400 to 15000 daltons, more preferably from 550 to 15000 daltons. Polyesters of the invention can basically be prepared from recycled polyethylene terephthalate and from renewable polyacids and/or polyols. The present invention further provides a process to produce such polyesters via glycolysis of a polyethylene terepthalate and/or a polyethylene isophthalate with a dianhydrohexitol.

Abstract: The presently disclosed and claimed inventive concept(s) relates generally to the method of producing a resin replacement compound, the resin replacement compound itself, and the use of the resin replacement compound. More particularly, but not to be construed as limiting, the presently disclosed and claimed inventive concept(s) relate to the recovery of an oligomeric form of polyethylene terephthalic acid from waste polyethylene terephthalate. In one particular aspect, the presently disclosed and claimed inventive concept(s) relate to the recovery of an oligomeric form of polyethylene terephthalic acid from waste products, such as beverage containers, made from polyethylene terephthalate. In an additional aspect, the presently disclosed and claimed inventive concept(s) relate to the use of a recovered oligomeric form of polyethylene terephthalic acid in a toner composition.

Abstract: A decomposition reaction apparatus for the decomposition treatment of a thermosetting resin, which comprises a reaction apparatus comprising an introduction section for introducing a resin composition containing the thermosetting resin and a solvent containing a monomer component of the thermosetting resin or a component similar to the monomer component, a decomposition reaction section for heating and pressuring the resin composition and the above solvent so as for the solvent to have a supercritical state or a subcritical state, to thereby prepare a treated and recovered product containing a recycled resin formed by the reduction of the molecular weight of the above thermosetting resin, and a discharge section for discharging the treated and recovered product.

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 invention relates to a composition comprising a modified, random copolyetherester containing a modified, random polytrimethylene terephthalate copolymer block that is derived from a polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers and combinations thereof; and contains at least one residue derived from the polyethylene terephthalate component; and a polyalkylene oxide copolymer block that contains polyalkylene oxide and at least one residue derived from the polyethylene terephthalate component.

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: To establish an efficient and economical useful component recovery method capable of recovering high purity useful components from a dyed polyester fiber. A method for recovering useful components from a dyed polyester fiber, includes a dye extraction step, a solid liquid separation step, a depolymerization reaction step, an ester interchange reaction step, and a useful component separation step, for recovering useful components from the dyed polyester fiber, wherein the dye extraction step includes a step of extracting and removing a dye at the glass transition temperature of the polyester or higher and at 220° C. or less with a xylene extracting solvent and an alkylene glycol extracting solvent in combination.

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: The invention relates to a method for recycling polyesters or polyester mixtures from polyester-containing waste, in which the polyester or the polyester mixture is dissolved in a solvent and subsequently free-flowing particles are precipitated herefrom with a precipitant. The precipitant is thereby chosen such that subsequent separation of precipitant and solvent is made possible in a simple manner.

Abstract: Compositions of matter including articles derived from (a) from 5 to 99.99 wt % of a modified polybutylene terephthalate random copolymer that (1) is derived from polyethylene terephthalate and (2) contains a at least one residue derived from polyethylene terephthalate selected from the group consisting of antimony, germanium, diethylene glycol groups, isophthalic acid groups, cis isomer of cyclohexane dimethanol, trans isomer of cyclohexane dimethanol, sodium benzoate, alkali salts, napthalane dicarboxylic acids, 1,3-propane diols, cobalt, cobalt-containing compounds, and combinations thereof, and (b) from 0.01 to 95 wt. % of a member selected from the group consisting of (1) fillers, (2) a carboxy reactive component, (3) polyethyelene terephthalate, (4) a component including a polycarbonate and an impact modifier. The articles may be derived from various conversion processes, e.g., injection molding processes, extrusion processes, thermoforming processes, melt-blown process.

Abstract: An ionomeric, modified poly(1,4-butylene terephthalate) copolymer comprising: polyester units comprising non-ionomeric ester units and ionomeric ester units substituted with an inorganic ionic group; and polyester units having at least one residue that is derived from a polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers is described.

Abstract: A molding composition comprising: (a) from 40 to 99.99 wt % of a modified polybutylene terephthalate random copolymer that (1) is derived from polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers and (2) has at least one residue derived from the polyethylene terephthalate component, and (b) from 0.01 to 20 wt. % of a carboxy reactive component; wherein the modified polybutylene terephthalate random copolymer, the carboxy reactive component, and optionally at least one additive, are present in a total amount of 100 wt %.

Abstract: A composition comprising a polytrimethylene terephthalate random copolymer that (1) is derived from polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers and (2) contains at least one residue derived from the polyethylene terephthalate component. Methods for making such copolymers and articles made from such copolymers.

Abstract: A method for rapidly depolymerizing a polyester and an unsaturated polyester by irradiating the polyester with microwaves in the presence of an alkylene glycol in which a titanium oxide fine powder having a bulk density of not more than 0.3 g/cm3 has been dispersed. Another embodiment comprises irradiating a polyester or an unsaturated polyester with microwaves in the presence of a monohydric alcohol or polyhydric alcohol containing an alkali metal and/or an alkaline earth metal. As a result, raw materials of a polyester, an unsaturated polyester or a polyurethane, such as an alkylene glycol and an unsaturated dibasic acid, can be recovered efficiently.

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: The present invention relates to a process for chemical recycling of PET waste that comprises, among other stages, a saponification reaction stage, wherein PET waste particles are reacted with stoichiometric or excessive amounts of a strong base metal in an alcoholic reaction media, the reaction being brought to the boiling temperature of the alcoholic reaction media, preferably at atmospheric pressure, thereby obtaining as reaction products a salt of terephthalic acid with the base metal and ethylene glycol, the latter being incorporated to the alcoholic reaction media. From this reaction it is possible to afford ethylene glycol, terephthalic acid and salts thereof, which are products with a high commercial value.