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From di- or higher ester of a polycarboxylic acid as sole reactant, or from a polycarboxylic acid or derivative with a compound containing two or more hydroxyl groups or salts thereof

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528 - Synthetic resins or natural rubbers -- part of the class 520 series



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Class / Patent application numberDescriptionNumber of patent applications / Date published
528274000 Polymerizing in the presence of a specified material other than reactant 57
528308000 Aryl-containing carboxylic acid or derivative of an aryl-containing dicarboxylic acid 51
528288000 Nitrogen-containing reactant 36
528302000 Two or more carboxylic acid or derivatives or mixtures thereof 22
528300000 Polyhydroxy-containing compound or salt thereof having an ether-oxygen atom as reactant 10
528298000 Fused- or bridged-ring-containing reactant other than solely as cyclic acid anhydride group 7
528287000 Phosphorus-containing reactant 6
528296000 Reactant contains three or more carboxylic acid groups or is derivative thereof 6
528307000 Cycloaliphatic ring-containing reactant (other than aryl) 5
20100249364CLEANING DEVICE FOR SEPARATING DILACTIDE FROM MIXTURES, POLYMERISATION DEVICE, METHOD FOR SEPARATING DILACTIDE FROM MIXTURES AND USE THEREOF - The present invention relates to a device for separating a biodegradable, intermolecular cyclic diester of an alpha-hydroxycarboxylic acid from material mixtures which contain in addition the alpha-hydroxycarboxylic acid of the diester corresponding thereto. In particular, the diester is thereby dilactide and the acid lactic acid. Furthermore, the present invention relates to a method for separating dilactide from material mixtures, which is based on a modified, distillative method. In addition, the present invention describes a polymerisation device, in particular for preparing polylactide. Likewise, purposes of use of both the devices and of the method are indicated.09-30-2010
20080312406POLYESTER PROCESS USING A PIPE REACTOR - The invention is directed to polyester processes that utilizes a pipe reactor in the esterification, polycondensation, or both esterification and polycondensation processes. Pipe reactor processes of the present invention have a multitude of advantages over prior art processes including improved heat transfer, volume control, agitation and disengagement functions.12-18-2008
20110230635COPOLYMER POLYESTER RESIN AND MOLDED PRODUCT USING SAME - The present invention relates to a copolymer polyester resin and a molded product using the same and more specifically to a copolymer polyester resin that contains 10˜80 mol % of 1,4-cyclohexane dimethanol, 0.1˜50 mol % of a diol compound expressed as HO—R09-22-2011
20110230634COPOLYMER POLYESTER RESIN AND MOLDED PRODUCT USING SAME - The present invention relates to a copolymer polyester resin and a molded product using the same and more specifically to a copolymer polyester resin that contains 10˜80 mol % of 1,4-cyclohexane dimethanol, 0.1˜30 mol % of a cyclohexane dimethanol compound expressed as HOH09-22-2011
20090192286Polymers Incorporating 1,3 and 1,4 Cyclohexanedimethanol - A polymer containing a polyester polymer unit having the formula —(I-III-II)—, wherein III is derived form a di-carboxylic acid, wherein I is derived from 1,3 cyclohexanedimethanol, wherein II is derived from 1,4 cyclohexanedimethanol and wherein the polymer is a solid at room temperature.07-30-2009
528293000 Sulfur-containing reactant 4
20100022741BRUSH COPOLYMERS - A copolymer of formula 1 in which M01-28-2010
20090131628NORMAL-PRESSURE CATION-DYEABLE POLYESTER, TEXTILE PRODUCT MADE FROM THE SAME, AND PRODUCTION METHOD FOR THE SAME - A normal-pressure cation-dyeable polyester is provided which contains an isophthalic acid component having a metal sulfonate group in a predetermined proportion based on the total of acid components present in the polyester, and contains a polyalkylene glycol having an average molecular weight of 150 to 600 in a predetermined proportion based on the polyester, wherein the proportion of diethylene glycol based on the total of glycol components and a terminal carboxyl group concentration are each set within a predetermined range. The polyester is stable in quality and excellent in dark- and pale-color light fastness when used for textile products.05-21-2009
20090036641Anionic Soil Release Polymers - Anionic soil release polyesters are described which consist of terephthalic acid, sulfoisophthalic acid-(poly)alkylene glycol, a non-ionic end group and optionally a polyfunctional crosslinking monomer. These polyesters are suitable as soil release components in washing and cleaning compositions.02-05-2009
20090036640Oligomer Removing Agent for Polyester-Based Fiber Material - An oligomer removing agent for polyester-based fiber materials comprises a polyester copolymer which is obtained by polycondensation of a dibasic acid component containing 15-65 mol % of a sulfonate group-containing dibasic acid and a dihydric alcohol component containing polyethylene glycol with a molecular weight of 900-3500, and which has a 200° C. melt viscosity of 5000-23,000 mPa·s and has 10-40 mass % polyoxyethylene chains in the molecule. The oligomer removing agent is able to overcome the problems caused by deposition of polyester oligomers, when added to the dyeing bath in a dyeing step for polyester fiber materials or for fiber materials that are composites thereof with other fiber materials.02-05-2009
528299000 Halogen-containing reactant other than solely as halogen atom bonded to a carbonyl group 3
20100152410HIGH MOLECULAR WEIGHT POLYMERS, DEVICES AND METHOD FOR MAKING AND USING SAME - Anhydride polymers that release active or activatable agent(s) have pre-selected properties such as molecular weight, flexibility, hardness, adhesiveness, and other valuable properties. The polymers are suitable for use in compositions, formulations, coatings, devices, and the like that benefit from the controlled release of an agent(s) over a period of time. The polymers are prepared by a process involving various alternative and sequential steps that allow the design a priori of products with specific characteristics. The polymers are suitable as delivery systems, either by themselves, as compositions, formulations or devices.06-17-2010
20110218316POLYESTER FILMS WITH IMPROVED OIL REPELLENCY - Provided are films made from copolyesters having improved oil repellency as compared to conventional copolyesters. The copolyesters are derived from certain perfluorinated monomers.09-08-2011
20110218317POLYESTERS COMPRISING FLUOROVINYLETHER FUNCTIONALIZED AROMATIC MOIETIES - Disclosed are polyesters, particularly poly(trimethylene terephthalate), comprising fluorovinylether functionalized aromatic repeat units, and methods to make the polyester polymers. The polymers are useful for imparting soil resistance to polyesters, particularly in the form of fibers, fabrics, and carpets.09-08-2011
528297000 1,2-epoxy containing reactant 2
20120116048Coating Compositions for Containers and Methods of Coating - This invention provides a coating composition for use on a food-contact surface of a container (e.g., a food or beverage can) that includes a polymer having one or more segments of Formula I:05-10-2012
20100029892FLUORENE-BASED RESIN POLYMER AND METHOD FOR PREPARING THEREOF - The present invention relates to a fluorene-based resin polymer having a repeating unit of Formula 1 and a method for preparing the same. The fluorene-based resin polymer has a high molecular weight and low acid value, and has an excellent developing property, adhesive property, and stability.02-04-2010
528295500 Reactant which is a fatty acid glycerol ester, a fatty acid or salt derived from a naturally occurring glyceride, tall oil, or a fatty acid derived from tall oil 2
20100105861METHOD FOR PRODUCTION OF PEARLESCENT COMPOSITION - A method for producing a pearly luster composition containing pearly luster particles (A) containing a fatty acid glycol ester (a1) and a fatty acid glycol ester (a2) having a melting point higher than the melting point of the fatty acid glycol ester (a1), and a surfactant (B), wherein the method includes the steps of (i) solubilizing the fatty acid glycol ester (a2) in the presence of the surfactant (B); (ii) mixing the solubilized solution obtained in the step (i) with a molten fatty acid glycol ester (a1), to emulsify the mixture; and (iii) cooling the emulsified mixture obtained in the step (ii), to precipitate the pearly luster particles (A); a pearly luster composition obtained by the method; and a shampoo containing the pearly luster composition. The pearly luster composition obtained by the present invention is suitably used for shampoos, conditioners, body shampoos, liquid detergents, and the like.04-29-2010
20100016543CRYSTALLINE COPOLYESTERS HAVING HIGH SOLUBILITY IN NON-HALOGENATED SOLVENTS, AND THEIR USE - A description is given of the preparation of high molecular mass, crystalline copolyesters with high solubility in non-halogenated and non-aromatic solvents, and of their use in adhesives.01-21-2010
528306000 Ethylenically unsaturated carboxylic acid or derivative of an ethylenically unsaturated carboxylic acid 1
20100041858PROCESS FOR PRODUCING POLYESTER-POLYCARBONATE TYPE THERMOPLASTIC POLYESTER ELASTOMER AND POLYESTER-POLYCARBONATE TYPE THERMOPLASTIC POLYESTER ELASTOMER - The present invention is a process for producing a polyester-polycarbonate type thermoplastic polyester elastomer in which a hard segment consisting of a polyester constructed of aromatic dicarboxylic acid, and an aliphatic or alicyclic diol, and a soft segment consisting mainly of aliphatic polycarbonate are connected, comprising at least a step of increasing the molecular weight of an aliphatic polycarbonate diol by a reaction of an aliphatic polycarbonate diol and a chain extender, and a step of reacting aliphatic polycarbonate and a polyester constructed of aromatic dicarboxylic acid and an aliphatic or alicyclic diol in the molten state.02-18-2010
20090156779BACTERIUM CAPABLE OF PRODUCING ORGANIC ACID, AND METHOD FOR PRODUCTION OF ORGANIC ACID - Provided is a bacterium which is capable of producing an organic acid and is modified so as to have an enhanced 2-oxoglutarate dehydrogenase activity as compared with that of an unmodified strain. An organic acid such as succinic acid can be produced by culturing the bacterium.06-18-2009
20090131626SIMPLIFIED ISOPHTHALIC ACID PROCESS FOR MODIFYING PET - Disclosed are modified PET polymer compositions and process for making modified PET polymer compositions by reacting purified terephthalic acid and non-hydrogenated isophthalic acid with ethylene glycol. Compositions with acceptable visual appearance, such as clarity and color, can be made at typical modification levels for many packaging application. Disclosed are also shaped articles and the process for making shaped articles of the modified PET polymer composition.05-21-2009
20120165496INDUSTRIAL HIGH TENACITY POLYESTER FIBER WITH SUPERIOR CREEP PROPERTIES AND THE MANUFACTURE THEREOF - Disclosed are an industrial high tenacity polyester fiber with superior creep properties and a method of preparing the fiber. The industrial polyester fiber has a mono-filament fineness of 5 to 15 dpf, an intrinsic viscosity of 0.8 to 1.25 dl/g, and a creep change rate of 4.7% or less, wherein the creep change rate is measured at 160° C. for 24 hours while giving a load corresponding to a strain of 3% after heat-treating the fiber at 220° C. for 2 minutes while giving a load of 1 g/d, and the load corresponding to the strain of 3% is based on a value obtained from a load-strain curve of the fiber before heat-treatment.06-28-2012
20090306328COPOLYMER FOR SEMICONDUCTOR LITHOGRAPHY AND PROCESS FOR PRODUCING THE SAME - To provide a copolymer for semiconductor lithography employed for forming a resist film as well as thin films such as an anti-reflection film, a gap-filling film, a top coating film, etc. which are formed on or under a resist film, these films being employed in semiconductor lithography, wherein the copolymer has excellent solubility in a solution of a thin film-forming composition and prevents generation of microparticles (e.g., microgel) and pattern defects, and to provide a method for producing the copolymer reliably on an industrial scale.12-10-2009
20120238722PROCESS FOR THE CRYSTALLIZATION OF SUCCINIC ACID - The present invention relates to a process for recovering succinic acid in crystal form from a fermentation broth comprising succinic acid, comprising the steps of 09-20-2012
20110028678PRODUCTION METHOD OF ALIPHATIC POLYESTER - An object of the present invention is to provide a method for efficient continuous production of aliphatic polyester having good quality. The invention relates to a continuous production method of aliphatic polyester, wherein the polyester is obtained through a preparation step of slurry containing aliphatic dicarboxylic acid and aliphatic diol, an esterification reaction step and a polycondensation reaction step, wherein temperature range of the slurry during the preparation step thereof is from the coagulation point of the aliphatic diol to 80° C., and moisture content in the slurry is from 0.01 to 10% by weight.02-03-2011
20100204432BIODEGRADABLE ELASTOMERS PREPARED BY THE CONDENSATION OF AN ORGANIC DI-, TRI- OR TETRA-CARBOXYLIC ACID AND AN ORGANIC DIOL - The present disclosure relates to biodegradable and biocompatible elastomeric polymers prepared by the condensation of an organic di-, tri- or tetra-carboxylic acid and an organic diol followed by thermal crosslinking with a bis- or tri-lactone or reaction with a photosensitive compound and subsequent photocrosslinking. Said elastomers are amorphous, have a glass transition temperature below both room temperature and body temperature and will homogeneously degrade to water soluble by-products with no reported toxicity.08-12-2010
20100249362APPARATUS AND METHOD BOTH RELATING TO POLYMER SYNTHESIS - The present invention provides a method and apparatus for producing polylactic acid by depolymerizing lactic acid oligomers and subjecting the obtained lactide to ring-opening polymerization, through which lactide can be efficiently obtained. The present invention relates to a lactide production apparatus for continuously or intermittently producing lactide, comprising: a depolymerization device 09-30-2010
20120108783PIEZOELECTRIC SHEET, METHOD FOR MANUFACTURING PIEZOELECTRIC SHEET, AND MANUFACTURING APPARATUS - A specific region of a polylactic acid sheet is heated by a microwave. To allow the polylactic acid sheet to exhibit piezoelectricity in the thickness direction of the polylactic acid sheet, a high voltage is applied to the heated polylactic acid sheet in the thickness direction of the polylactic acid sheet, and thereby the screw axes of at least a part of the polylactic acid molecules are relatively aligned with the thickness direction. Then the polylactic acid sheet is rapidly cooled, and thereby the polylactic acid molecules are immobilized. The same step is executed for other regions of the polylactic acid sheet, and thereby piezoelectricity is imparted to a wide area of the polylactic acid sheet in the thickness direction. The resultant piezoelectric sheet is capable of exhibiting a high piezoelectricity in the thickness direction.05-03-2012
20080207868Apparatus for Heat Treatment of Polyester Particle and Method of Multistage Solid-Phase Polycondensation of Polyester Particle - An apparatus for a heat treatment of polyester particles, comprising: (1) a first fluidized bed; (2) a first moving bed; (3) a second fluidized bed; and (4) a second moving bed in the stated order along a flow of the particles, wherein the second moving bed has a capacity twice or more as large as a capacity of the first moving bed.08-28-2008
20090192285Method and device for the production of polyesters and copolyesters - Disclosed is a method for producing polyesters by means of esterification or re-esterification, precondensation of the esterified/re-esterified product, and polycondensation of the precondensed product at a pressure of 0.2 to 500 mbar and a temperature of 230 to 330° C. According to said method, the vapors formed during precondensation and polycondensation are condensed and the obtained cooled diol is redirected into the condensation stage. In order to improve the degree of separation, the vapors are directed into a bottomless direct contact condenser, the base of which is immersed into the top funnel-shaped section of a barometrically dipped downpipe so as to form an annular space, cooled diol is sprayed into the vapors in the top section of the direct contact condenser, the remaining vapors are recovered via the annular space, and the formed polymer aggregates are removed.07-30-2009
20100331512METHOD FOR PRODUCING CYCLIC DIESTERS OF L-, D- AND D,L-LACTIC ACID - Method for the production of L,L-, D,D-, D,L- and meso-dilactides, comprising the polycondensation and/or polytransesterification of an L-, D- or D,L-lactic acid or of esters thereof to polyesters of higher molecular weights of the L-, D- and D,L-lactic acid (polylactic acids) and cyclizing depolymerization of the polylactic acids to dilactides, wherein the polyesters of higher molecular weights of the L-, D- and D,L-lactic acids are produced in the presence of hydrolysis-stable metal compounds as catalyst.12-30-2010
20090036639Post-Processing of Polylactic Acid Article - Methods are provided for making a polylactic acid article. The methods may include the steps of providing an article comprising polylactic acid; supporting the article using a carrier support system; and curing the article with heat. The step of curing the article is effective to improve one or more properties of the article. Articles comprising polylactic acid also are provided having improved properties. Methods also are provided for preparing a beverage including the steps of providing a pod comprising polylactic acid, wherein the pod has been cured with heat while being supported by a carrier support system; placing a beverage material in the pod; placing a hot liquid into the pod; brewing the beverage material and hot liquid in the pod to create a beverage; and removing the beverage from the pod.02-05-2009
20120202962DEVICE AND METHOD FOR PRODUCING POLYBUTYLENE SUCCINATE - A device and a method for producing high-quality polybutylene succinate are provided. The method for producing polybutylene succinate comprises the steps of: preparing a raw-material slurry by mixing succinic acid or a derivative thereof with 1,4-butanediol in a raw-material slurry preparation tank; storing the raw-material slurry in a raw-material slurry storage tank while maintaining flowability; carrying out an esterification reaction of the raw-material slurry in an esterification reactor; and synthesizing polybutylene succinate with a polycondensation reaction of the ester in a polycondensation reactor, in which the polycondensation reactor is divided, from the upstream side, into at least an initial polycondensation reactor, an intermediate polycondensation reactor, and a final polycondensation reactor, a catalyst is added in an amount from 1000 ppm to 3000 ppm in relation to succinic acid or a derivative thereof, the reaction time in the intermediate polycondensation reactor ranges from 0.25 hours to 0.75 hours, and the reaction temperature in the final polycondensation reactor ranges from 245° C. to 255° C.08-09-2012
20110263811METHOD FOR PRODUCING LACTIC ACID AND METHOD FOR PRODUCING POLYLACTIC ACID - Lactic acid is obtained by a method including (A) a step of continuous fermentation wherein a fermentation culture medium of a microorganism having an ability of lactic acid fermentation is filtered through a porous membrane having an average pore size of not less than 0.01 μm and less than 1 μm with a transmembrane pressure difference within the range of 0.1 to 20 kPa, and the permeate is collected, while retaining the non-permeated liquid in or returning the non-permeated liquid to the culture, and adding a fermentation feedstock to the culture; (B) a step of filtering the permeate obtained in Step (A) through a nanofiltration membrane; and (C) a step of distilling the permeate obtained in Step (B) under a pressure of not less than 1 Pa and not more than atmospheric pressure, at 25° C. to 200° C. to recover lactic acid.10-27-2011
20110178265POLYESTER POLYMERIZATION CATALYST AND METHOD FOR PRODUCING POLYESTER USING THE SAME - Provided are a polyester polymerization catalyst with which the generation of foreign materials caused by the catalyst or mold pollution at the time of molding are reduced and polyesters having remarkably superior thermal stability and color tone can be obtained.07-21-2011
20090292101METHOD AND INSTALLATION FOR INCREASING THE INTRINSIC VISCOSITY OF POLYESTER MATERIAL BY SOLID PHASE POLYCONDENSATION - An installation for increasing the intrinsic viscosity of a polyester material by solid phase polycondensation (SSP) comprises a heatable reaction container (11-26-2009
20100137551Methods and materials for the production of D-lactic acid in yeast - The present invention relates to biocatalysts that are cells, optimally of the Crabtree-negative phenotype, comprising expression vectors encoding genes heterologous to the cell that enable increased production of organic products. More specifically, the invention relates to genetically modified 06-03-2010
20100240857USE OF HYPERBRANCHES POLYESTERS AND/OR POLYESTER AMIDES FOR SEPARATING OIL-IN-WATER EMULSIONS - The use of nondendrimeric hyperbranched polyesters and/or polyesteramides which comprise alkyl- and/or alkenyl-substituted succinic acid units as demulsifiers for splitting oil-water emulsions, especially crude oil emulsions, and also nondendrimeric hyperbranched polyesters or polyesteramides which comprise alkyl- and/or alkenyl-substituted succinic acid units.09-23-2010
20100280214HIGHLY PURE AMPHIPHILIC COPOLYMER COMPRISING HYDROPHOBIC BLOCK FROM ALPHA-HYDROXY ACID AND PROCESS FOR THE PREPARATION THEREOF - Disclosed are a highly pure amphiphilic block copolymer including a hydrophobic polymer block of a poly(α-hydroxy acid), and a method for preparing the same. The method for preparing a highly pure amphiphilic block copolymer including a hydrophobic polymer block of a poly(α-hydroxy acid) includes removing α-hydroxy acid, lactone monomers thereof, oligomers thereof and an organometal catalyst in polymerizing the amphiphilic block copolymer.11-04-2010
20100331513THERMO-SHRINKABLE POLYESTER FILM - Disclosed is a thermo-shrinkable polyester film having superior thermal shrinkage properties. The thermo-shrinkable polyester film has a strength of 3.5˜6.5 kg/mm12-30-2010
20110112273Group 3 Post-Metallocene Complexes Based on Bis(Naphthoxy)Pyridine and Bis(Naphthoxy)ThioPhene Ligands for the Ring-Opening Polymerisation of Polar Cyclic Monomers - The present invention relates to the use of group 3 post-metallocene complexes based on sterically encumbered bis(naphthoxy)pyridine and bis(naphthoxy)thiophene ligands in the ring-opening polymerisation of polar monomers such as, for examples, lactones, lactides, cyclic carbonates.05-12-2011
20110201776Method for Thermally Treating Polyester Pellets to Obtain a Partial Crystallization - The invention relates to a method for thermally treating polyester pellets to obtain partial crystallization, whereby the polyester melt is supplied to an underwater granulating system and granulated; the thus obtained granulate are fed from the underwater granulating system into a water-solids separator. The dried granulate is then fed into a treatment device at a granulate temperature higher than 100 degrees C., without external energy or heat being supplied. The intrinsic heat of the granulate is used as the heat treatment leading to partial crystallization. The crystallization device is embodied as an at least lightly inclined reactor, into which granulate is fed at a temperature higher than 100 degrees C. The granulate passes through the reactor from the loading point to the discharge point under its own weight and exits the reactor with a temperature higher than 130 degrees C.08-18-2011
20100010191Methods for Preparing Selectively-Releasable Adhesives - In one embodiment, a method for preparing a selectively releasable adhesive includes condensing a multifunctional alcohol and a multifunctional carboxylic acid to form a prepolymer and curing the prepolymer at an elevated temperature and a vacuum to produce a cured polymer.01-14-2010
20110028677BIAXIAL ORIENTED POLYESTER FILM AND A PROCESS FOR PREPARING SAME - The present invention relates to a biaxial oriented polyester film and process for preparing the same, the said film is having an average ellipticity of not more than 0.6, Poisson ratio of not more than 0.7 (at elongation greater than 25%) all along the width of web and residual enthalpy in the range of 12% to 20%, a continuous reduction in residual film area up to an elongation of 100%.02-03-2011
20100174044POLYESTER RESIN, METHOD OF PRODUCING THE SAME, COMPOSITION FOR MOLDED ARTICLE AND MOLDED ARTICLE - Provide are a novel polyester resin that can be used for producing a molded article excellent in impact resistance, and a method of producing the polyester resin. The polyester resin has structural units represented by the following general formulae (1) and (2), and contains the structural unit represented by the general formula (2) at a content of 50.1 mol % or more to 99.9 mol % or less with respect to the total of the structural units represented by the general formulae (1) and (2). The method of producing a polyester resin, includes copolymerizing a furandicarboxylic acid or an ester thereof with ethylene glycol and diethylene glycol. In the formula, R07-08-2010
20080221297Polyester production system employing hot paste to esterification zone - A polyester production process employing an esterification system that uses a distillation column to recover alcohol produced from an esterification zone and then utilizes the recovered alcohol to form a paste, which is recirculated back to the esterification zone with little or no cooling.09-11-2008
20080221296Polyester production system employing an unagitated esterification reactor - A polyester production system employing a vertically elongated esterification reactor. The esterification reactor of the present invention is an improvement over conventional CSTR esterification reactors because, for example, in one embodiment, the reactor requires little or no mechanical agitation. Further, in one embodiment, the positioning of the inlets and outlets of the reactor provides improved operational performance and flexibility over CSTRs of the prior art.09-11-2008
20090082540HYDROLYSABLE LINKERS AND CROSS-LINKERS FOR ABSORBABLE POLYMERS - The present invention relates to the discovery of new class of linear and multiarmed hydrolysable linkers and cross linkers for use in the synthesis of biodegradable polymers such as, polyesters, polyurethanes, polyamides, polyureas and degradable epoxy amine resin. The linear and multiarmed hydrolysable linkers of the present invention include symmetrical and/or unsymmetrical ether carboxylic acids, amines, amide diols, amine polyols and isocyanates.03-26-2009
20130197183Process for Producing a Lactic Acid-Amine Complex - A process for the production of a complex of lactic acid and either ammonia or an amine, comprising reacting one or more saccharides with barium hydroxide to produce a first reaction mixture comprising barium lactate, and contacting at least part of the first reaction mixture with ammonia or an amine and with carbon dioxide, or with the carbonate and/or bicarbonate salt of ammonia or an amine, to produce a second reaction mixture comprising said complex and barium carbonate.08-01-2013
20130211037METHOD FOR PRODUCING POLYESTER - The present invention is aimed to provide a method for producing a polyester with reduced CD content and elution amount, in which even after the production method, a reduction in physical properties of the polyester is small, and furthermore, a polyester having good moldability can be produced, and the present invention is concerned with a method for producing a polyester including an esterification reaction step of allowing an aliphatic diol and an aliphatic dicarboxylic acid to react with each other; a step of pelletizing a polyester obtained through the esterification reaction step; and a contact treatment step of bringing the obtained polyester pellets into contact with a mixed solution containing ethanol and water, wherein the mixed solution contains water in an amount of 10% by mass or more and not more than 99% by mass relative to the whole of the mixed solution.08-15-2013

Patent applications in class From di- or higher ester of a polycarboxylic acid as sole reactant, or from a polycarboxylic acid or derivative with a compound containing two or more hydroxyl groups or salts thereof

Patent applications in all subclasses From di- or higher ester of a polycarboxylic acid as sole reactant, or from a polycarboxylic acid or derivative with a compound containing two or more hydroxyl groups or salts thereof