| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 521048000 | Treating polyester | 47 |
| 20080249200 | Method of Producing Thermoplastic Polymer Solution - 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. | 10-09-2008 |
| 20090093557 | METHOD FOR OPTIMIZATION OF RPET DECONTAMINATION - 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. | 04-09-2009 |
| 20090099270 | Method for Decomposing and Reclaiming Synthetic Resin Having Ester Bond in the Composition Structure - 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. The separation collection treatment is a treatment in which the decomposition product generated by the hydrolysis treatment is separated into liquid component and solid component to be collected individually. | 04-16-2009 |
| 20090124716 | METHOD FOR PROCESSING POLYESTER WASTE - 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. | 05-14-2009 |
| 20090192235 | Method and Device for the Decontamination of Plastic Flakes - 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. | 07-30-2009 |
| 20090264545 | Polyester Composition And Method For Preparing Articles By Extrusion Blow Molding - Polyester compositions described herein have properties which are particularly suitable for extrusion blow molding (EBM). These properties relate primarily to the rate of crystallization and melt strength or melt viscosity. Articles prepared from the polyester compositions exhibit good clarity, aesthetics, and other physical properties. The polyester compositions also exhibit broad molecular weight distribution (MWD), resulting in improved processability and melt strength. The crystallization rate allows for good drying characteristics while also enabling the use of regrind. In addition, the compositions exhibit improved recyclability, such as in existing PET recycling streams. In one aspect, articles are prepared in an extrusion blow molding method by combining a dry first polyester copolymer component, a dry second polyester component, and a chain extender to form a feed material suitable for extrusion blow molding. In another aspect, a single component co-polyester and a chain extender are combined to form a feed material. | 10-22-2009 |
| 20100113626 | OPAQUE CONTAINERS CONTAINING COLORED RECYCLED POLYESTER - The present invention relates to a composition comprising a colored recycled polyethylene terephthalate (RPET) and an opacifying material. The composition can further comprise a virgin polyethylene terephthalate (PET), a high gas barrier or an oxygen scavenging compound. Suitable opacifying material, suitable high gas barrier polymer and suitable oxygen scavenging compound are disclosed herein. Other embodiments of the present invention include articles produced from these compositions and processes for producing these compositions. | 05-06-2010 |
| 20100137463 | POLYESTER WITH CAUSTIC MATERIAL MIXING METHODS AND MIXING REACTORS - The invention relates to a method for mixing a polyester with caustic material including providing a polyester, preferably PET, mixing the polyester with the caustic material; and heating the mixture in temperature stages defined as a function of a reaction sequence of the reaction between the PET and the caustic material. | 06-03-2010 |
| 20100152311 | RECYCLED POLYETHYLENE TEREPHTHALATE COMPOSITIONS, FIBERS AND ARTICLES PRODUCED THEREFROM, AND METHODS FOR PRODUCING SAME - 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. | 06-17-2010 |
| 20100292352 | PREPARATION AND APPLICATION OF CHAIN-EXTENDING CONCENTRATES FOR POLYESTER FOAMING PROCESS - The composition and the preparation of a chain-extending concentrate for production of foamed cellular materials of aromatic polyesters is disclosed in this invention. The chain-extending concentrate includes an ethylene-acrylate copolymer, a high-temperature thermoplastic and a multifunctional compound. The preparation process includes two steps: 1) Mixing and melt blending the multifunctional compound and the HT thermoplastic resin into the matrix of the ethylene-acrylate copolymer in an internal mixer and 2) extrusion of the mixture at a temperature below the melting point or reaction temperature of the multifunctional compound. | 11-18-2010 |
| 20100324160 | Composite Containing Modified Hybride Resin Based on Natural Fatty Acids - The invention relates to natural fatty acid based hybride resin, modified with reactive monomers, and to a method for preparing it. The invention also relates to the use of the modified natural fatty acid based hybride resin as binding agent especially in water based coatings, glues and composites, and as environmentally friendly wood impregnating agent. The modified natural fatty acid based hybride resin comprises the condensation product of natural fatty acid or natural fatty acid ester, modified with di- or oligo-carboxylic acid or anhydride or half ester, and natural fatty acid based alkyd resin. | 12-23-2010 |
| 20110086930 | METHOD FOR DECOMPOSING THERMOSET RESIN AND RECOVERING DECOMPOSITION PRODUCT - The present invention relates to a method for decomposing, in the presence of subcritical water, a thermosetting resin comprising a polyester moiety and a crosslinking moiety therewith to provide a compound comprising an acid residue derived from the polyester moiety and a residue derived from the crosslinking moiety, and collecting the compound in an efficient yield, specifically, which comprises steps of:
| 04-14-2011 |
| 20110172318 | METHOD OF DECREASING ACETALDEHYDE LEVEL IN A MOLDED ARTICLE - There is provided a method ( | 07-14-2011 |
| 20110201703 | PROCESS FOR THE PREPARATION OF TRANSPARENT SHAPED ARTICLES - Disclosed is a process for the preparation of shaped articles such as, for example, sheeting, films, tubes, bottles, preforms and profiles, having high transparency and low haze comprising immiscible blends of one or more thermoplastic polymers selected from polyesters, polycarbonates, and polyarylates, and a copolyamide or a transamidized, homogeneous blend of a least two polyamides. The components of the immiscible blend which have refractive indices which differ by about 0.006 to about −0.0006. The small difference in the refractive indices enables the incorporation of regrind into the polymer composition to produce transparent shaped articles. These articles may have one or more layers and can exhibit improved excellent barrier properties and good melt processability while retaining excellent mechanical properties. Metal catalysts can be incorporated into the compositions to produce shaped articles having oxygen-scavenging properties. | 08-18-2011 |
| 20110306688 | METHODS AND SYSTEMS FOR RECYCLING FIBROUS SUBSTRATES - Embodiments of the present disclosure include methods of removing face fibers from a fibrous substrate, systems of removing face fibers from a fibrous substrate, and the like. | 12-15-2011 |
| 20120157557 | METHOD AND DEVICE FOR SEPARATING FOREIGN POLYMERS FROM A POLYMER MIXTURE - A method of separating foreign polymers from a polymer mixture that comprises amorphous PET particles and crystalline PET particles, wherein the softening point of the foreign polymers is lower than that of the crystalline PET particles, and wherein the method includes separating the amorphous PET particles from the polymer mixture, heating the resulting polymer mixture to a temperature between the softening point of the foreign polymers and that of the crystalline PET particles, and separating the foreign polymers from the resulting polymer mixture. Also, a device for separating foreign polymers from a polymer mixture that comprises amorphous PET particles and crystalline PET particles, the device including a first separation unit for separating the amorphous PET particles from the polymer mixture, and a second separation unit for separating the foreign polymers from the resulting polymer mixture. | 06-21-2012 |
| 20120208908 | METHOD AND DEVICE FOR PROVIDING A RAW MATERIAL FOR THE PRODUCTION OF PET CONTAINERS - A method and a device for providing a raw material for the production of PET containers, the raw material being mixed from recycled PET (r-PET) and virgin PET (v-PET), where in order to optimize both the plant and the method, v-PET is added in a quantitatively controlled manner to the r-PET prior to the last heating of the r-PET or to the heated r-PET. | 08-16-2012 |
| 20120238650 | PLANT AND METHOD FOR THE RECYCLING OF PLASTICS, PREFERABLY PET - A plant and a method for the recycling of plastics, preferably PET, including a switching device for switching between a first process line for a first production process for the production of a first recycling product, in particular pellets, and a second process line for a production process for the production of a second recycling product, in particular flakes, so as to render the recycling process more flexible. | 09-20-2012 |
| 20130041053 | Process for the Preparation of Polyesters with High Recycle Content - Disclosed is a process for producing copolyesters with high levels of recycled content. Scrap or post-consumer poly(ethylene terephthalate) is depolymerized by methanolysis or glycolysis to produce a purified, recycled dimethyl terephthalate which can be repolymerized with 2 or more diols. The polyesters of this invention have physical properties and an appearance that is similar to polyesters prepared from virgin monomers. In addition to dimethyl terephthalate, the polyesters can be prepared from recycled ethylene glycol recovered from depolymerization of poly(ethylene terephthalate) and/or 1,4-cyclo-hexanedimethanol prepared by hydrogenation of recycled dimethyl terephthalate or recovered from depolymerized polyester mixtures. | 02-14-2013 |
| 20130143974 | METHOD AND DEVICE FOR THE DECONTAMINATION OF PLASTIC FLAKES - 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. | 06-06-2013 |
| 20130261197 | Additive for Use in Wash Step of PET Recycling Process - An additive for use in a wash solution of a PET recycling process is described. The PET recycling process includes the steps of sorting the scrap PET to remove other materials, granulating or shredding the scrap PET to produce PET flakes, and washing the PET to remove contaminants. The Wash step comprises the steps of contacting the PET flakes with a wash solution comprising: (a) an alkali hydroxide; and (b) an additive comprising: (i) at least one non-ionic surfactant; (ii) at least one cationic surfactant; (iii) a hydrotrope; (iv) water, and (V) optionally, a solvent. | 10-03-2013 |
| 20140088210 | REMOVAL OF COLOR FROM THERMOPLASTICS - A process of decolorizing dyed thermoplastics are provided that includes intermixing a dyed thermoplastic with a decolorization agent solution at a temperature that maintains the crystalline structure of the thermoplastic. The processes for the first time are capable of removing substantial portions of dye from the thermoplastic providing a material that is suitable for recycling processes and use in subsequent recycled articles. | 03-27-2014 |
| 20140135412 | METHOD AND APPARATUS FOR REMOVING FOREIGN SUBSTANCES FROM POLYMERS - Method for removing a foreign substance from a polymer composition including subjecting a polymer composition to a medium selected from the group comprising chemical reagents, electron beam radiation, electromagnetic radiation, or combinations thereof, removing the transformed foreign substance from the polymer composition, where the foreign substance is by subjecting the polymer composition to the medium at least partially transformed into a form that facilitates removal from the polymer composition. Also, an apparatus for removing a foreign substance from a polymer composition including a device for subjecting a polymer composition to a medium selected from the group comprising chemical reagents, electron beam radiation, electromagnetic radiation, or combinations thereof, and a device for removing the transformed foreign substance from the polymer composition, where the foreign substance is by the device for subjecting the polymer composition to the medium at least partially transformed into a form that facilitates removal from the polymer composition. | 05-15-2014 |
| 20140213673 | RECYCLED POLYETHYLENE TEREPHTHALATE COMPOSITIONS, FIBERS AND ARTICLES PRODUCED THEREFROM, AND METHODS FOR PRODUCING SAME - 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. | 07-31-2014 |
| 20140323602 | DIRECT PRINTING METHOD WITH A BASE LAYER - A method and a device for direct printing onto plastic containers, where an intermediate layer is in a first step using a first device applied onto the container to be printed and the container is in a second step using a second device printed in certain areas, and the intermediate layer enters into a bond with the container and the print layer that is insoluble in aqueous solutions having a pH value between 3 and 10, and is very soluble in aqueous solutions having a pH value in a range less than 3 and/or greater than 10; and a recycling method for a plastic container having an intermediate layer applied. | 10-30-2014 |
| 20150057379 | PROCESSES FOR RECYCLING CARPET AND PRODUCTS OF SUCH PROCESSES - Methods for the recycling of carpet are disclosed that produce clean face fiber suitable for industrial use. The methods allow the recovery of face fiber material, for example a polyester or a polyamide, from carpets that includes a face fiber material and a backing material, and include the steps of heating the carpet to a temperature lower than the melting point of the face fiber material, but higher than the initial thermal decomposition temperature of the backing material, for a time and at a temperature sufficient to thermally decompose, pyrolyze, or oxidize at least a portion of the backing material, rendering the backing material friable, that is more friable than the untreated backing; and applying mechanical force to the carpet so as to liberate the friable backing material from the face fiber material. | 02-26-2015 |
| 20150353704 | POLYESTER COMPOSITIONS - The invention relates to compositions based on polyethylene terephthalate and polybutylene terephthalate with optimized crystallization behavior and consequently with optimized processing behavior in the injection molding process, and also to products to be produced therefrom, in particular with optimized crystallinity. | 12-10-2015 |
| 20160039992 | PROCESS FOR RECYCLING A METALIZED POLYESTER FILM - The present invention relates to a process for converting the waste or used metalized polyester (PET) film into recycled PET (RPET) as a starting raw material for various utility products. Particularly, the present invention provides a process for the manufacturing of high quality strapping or monofilament yarn or sheets from the recycled metalized PET film. | 02-11-2016 |
| 521480500 | Treating with alcohol | 19 |
| 20080242751 | PROCESSES FOR MANUFACTURING POLYESTERS FROM POST-CONSUMER POLYESTER - The present invention relates to processes for manufacturing polyesters The processes can be used for manufacturing polyesters from post-consumer polyesters. The processes include contacting a post-consumer polyester with at least one diol, at elevated temperature in presence of a catalyst, effecting a transesterification reaction. Biologically-derived diols can be used. | 10-02-2008 |
| 20090023823 | POLYOLS AND POLYURETHANES, POLYURETHANEFORMS USING THE SAME - The present invention relates to a preparing method of polyols and polyurethane, polyurethaneforms using the same by depolymerizing the polyester, polyamide and polyurethane with the polymeric fatty acid monopoly hydroxyl alcoholide, and additionally react with the polybasic acid, polyol and amine to prepare acid value of 0.5˜1 DKOH/g, hydroxyl value of 10˜500 DKOH/g, and amine value of 1˜50 DKOH/g in polyol, and polyurethane and polyurethaneforms using the same. This is to transform the double bond of the unsaturated fatty acid from the component of the oils and fats in conjugate double bond to induce the Diesl-Alder reaction, and with the improvement of the reactivity to form stability combination in chemical structure to prevent the separate leaching appearance of fatty and fatty oil from the final product, and having the fine compatibility with the polyether-polyol as well as transparent and storage stability. Furthermore, it has 100% of solid with very low viscosity at the room temperature for easy handling while having a great reactivity with the isocyanate that this preparing polyol having excellent chemical and mechanical properties. And, in particular, by recycling the waste edible oil and waste synthetic resin that can be employed as industrially useful material for environment-friendly and economical advantage. | 01-22-2009 |
| 20090281204 | Process for the Manufacture of Ionomeric Polybutylene Terephthalate From Polyethylene Terephthalate, and Compositions and Articles Thereof - 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. | 11-12-2009 |
| 20110009507 | METHOD OF DECOMPOSING THERMOSET RESIN AND RECOVERING PRODUCT OF DECOMPOSITION - The present invention relates to a method for decomposing a thermosetting resin to provide decomposed products, which can be easily separated, efficiently collected and recycled. Specifically, the present invention relates to a method for decomposing a thermosetting resin comprising a polyester moiety and a crosslinking moiety therewith to provide decomposed products to be collected and recycled, which comprises steps of:
| 01-13-2011 |
| 20110039959 | POLYOL INCLUDED PHOSPHORUS AND NITROGEN - Provided are a phosphorus- and nitrogen-containing polyol composition, a method of preparing the same, and flame-retardant polyol for polyurethane, using the phosphorus- and nitrogen-containing polyol composition. In particular, provided are a phosphorus- and nitrogen-containing polyol which has a structure in which, in the molecule of polyol, phosphorus is co-bound to a hydroxyl group of polyol and an amino group of a nitrogen compound by a chemical reaction, and is prepared to comprise 1-20% of phosphorus and 1-17% of nitrogen, thereby obtaining excellent stability, compatibility with other polyols, reactivity, and flame-retardant characteristics, and a method of preparing the same. | 02-17-2011 |
| 20120149791 | OLIGOMERIC PRODUCTS OF POLYETHYLENE TEREPHTHALATE (PET) AND METHODS OF MAKING AND USING SAME - 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. | 06-14-2012 |
| 20120220676 | POLYESTERS FOR COATINGS - 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. | 08-30-2012 |
| 20130053461 | METHOD FOR THE PREPARATION OF (POLYBUTYLENE-CO-ADIPATE TEREPHTHALATE) THROUGH THE IN SITU PHOSPHORUS CONTAINING TITANIUM BASED CATALYST - 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. | 02-28-2013 |
| 20130053462 | VAPOR PHASE ASSISTED POST-CONSUMER POLYMER PROCESSING APPARATUS AND METHOD - 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. | 02-28-2013 |
| 20130261198 | BIODEGRADABLE ALIPHATIC-AROMATIC COPOLYESTERS, METHODS OF MANUFACTURE, AND ARTICLES THEREOF - Biodegradable compositions containing an aliphatic-aromatic copolyester derived from aromatic polyesters. Methods of making the compositions and articles made from the compositions. | 10-03-2013 |
| 20140031440 | METHOD FOR THE PREPARATION OF MODIFIED POLY(ALKYLENE TEREPHTHALATE) EMPLOYING IN SITU TITANIUM-CONTAINING CATALYST - 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. | 01-30-2014 |
| 20140031441 | Process for the Preparation of Modified Poly(Alkylene Terephthalate) Employing an In-Situ Titanium-Containing Catalyst - 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. | 01-30-2014 |
| 20150045462 | VAPOR PHASE ASSISTED POST-CONSUMER POLYMER PROCESSING APPARATUS AND METHOD - 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. | 02-12-2015 |
| 20150291763 | MANUFACTURE OF DIHYDROXY AROMATIC COMPOUNDS BY ALCOHOLYSIS OF FLAME RETARDANT-CONTAINING POLYCARBONATE COMPOSITIONS - The disclosure provides a method for recovering a dihydroxy aromatic compound and a dialkyl carbonate from a polycarbonate-containing composition comprising a polycarbonate and a phosphorus-containing flame retardant. The method comprises heating the composition in the presence of an alcohol and a transesterification catalyst having non-neutralizable groups at a temperature of 70° C. to 200° C. and a pressure of 50 mbar to 40 bar for a time sufficient to depolymerize the polycarbonate producing a dihydroxy aromatic compound and a dialkyl carbonate. | 10-15-2015 |
| 20150353705 | PROCESS FOR RECYCLING POLYESTER WASTE - The present disclosure relates to a polyester glycolate obtained by glycolyzing a mass of the polyester with excess of ethylene glycol in the presence of an acid catalyst. The present disclosure also relates to a process for manufacturing recycled polyester from the polyester glycolate. | 12-10-2015 |
| 20160009893 | Method and Apparatus for Color Removal from PET-flake (shredded PET) | 01-14-2016 |
| 20160060419 | METHODS AND MATERIALS FOR DEPOLYMERIZING POLYESTERS - Provided is a method of depolymerizing polyesters from post-consumer products, such as beverage bottles, to produce a high purity reaction product. For the depolymerization reaction, the polyesters are reacted with an alcohol and an amine organocatalyst at a temperature of about 150° C. to about 250° C. In one application, the use of an organocatalyst with a boiling point significantly lower than the boiling point of the reactant alcohol allows for the ready recycling of the amine organocatalyst. In another application, performing the depolymerization reaction under pressure at a temperature above the boiling point of the alcohol allows for accelerated depolymerization rates and the recovery of the organocatalyst with no further heat input. In a further application, glycolytic depolymerization of poly(ethylene terephthalate) (PET) produces a reaction product of bis(2-hydroxyethyl)terephthalate (BHET), which may in turn be used to produce high purity beverage bottle grade PET, in a closed loop process with minimal waste. | 03-03-2016 |
| 20160083511 | IMPROVED PROCESS FOR THE PREPARATION OF MODIFIED POLY(ALKYLENE TEREPHTHALATE) EMPLOYING AN IN-SITU TITANIUM-CONTAINING CATALYST - 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, boroncontaining compounds, and combinations thereof. | 03-24-2016 |
| 20220135761 | PROCESS FOR THE DEPOLYMERIZATION OF POLYETHYLENE TEREPHTHALATE (PET) - 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. | 05-05-2022 |
