Class / Patent application number | Description | Number of patent applications / Date published |
528275000 | Material contains a metal atom | 85 |
20080242831 | Lower-color polytrimethylene ether glycol using zero-valent metals - The present invention relates to a process for preparing lower-color polytrimethylene ether glycol polymer, comprising contacting said polytrimethylene ether glycol polymer, or its precursor reaction-mixture, with a zero-valent metal during at least one stage of the process of manufacture, or on the polytrimethylene glycol resulting form such process, such that the polytrimethylene ether glycol polymer demonstrates a reduced color (as compared to using no zero-valent metal). | 10-02-2008 |
20090143561 | Process for producing polyester with metal phosphonic acid complex catalysts - Disclosed is a method for the preparation of a polyester, which method comprises in a first step, reacting a dicarboxylic acid or a C | 06-04-2009 |
20090292102 | METAL SULFATE ALCOHOL COMPOSITION AND PROCESS THEREWITH - A metal sulfate alcohol composition as well as a process to produce such composition is disclosed. Also disclosed is a process to produce polyester containing the metal sulfate alcohol composition. | 11-26-2009 |
20120202963 | POLYETHER AND ITS PRODUCTION PROCESS - In producing a polyether in the presence of a double metal cyanide complex catalyst, a narrow molecular weight distribution of the polyether can be obtained. Producing a polyether with at least one hydroxy group includes subjecting a cyclic monomer, such as an alkylene oxide, to a ring-opening addition polymerization with an initiator having a hydroxy group, in the presence of a double metal cyanide complex catalyst. | 08-09-2012 |
20140142272 | CONTINUOUS PREPARATION FOR POLYESTER - A process of continuous production for polyester, comprising continuously supplying an esterification or transesterification product comprising ester oligomers with an acid value of less than 100 meq/kg to a liquid phase polymerization reactor, wherein the esterification or transesterification product is produced by esterification or transesterification of a polycarboxylic acid or an alkyl ester thereof and a polyhydric alcohol; and performing a liquid-phase polymerization at a temperature of 200 to 270° C. and at a pressure of 0 to 5 torr in a liquid-phase polymerization reactor to produce the polyester with an intrinsic viscosity of 0.4 dl/g or higher. | 05-22-2014 |
20160060385 | POLYESTER - The present invention relates to a process for producing polyester, which method comprises reacting a dicarboxylic acid and a diol in the presence of a trizazine derivative, such as melamine-cyanuric acid (MeCy). The invention also relates to process for producing a polyester, which method comprises reacting a dicarboxylic acid and a diol in the presence of a metal sulfate. | 03-03-2016 |
20160251475 | ALIPHATIC POLYCARBONATE WITH LONG-CHAIN BRANCHES AND AROMATIC COPOLYESTER THEREOF | 09-01-2016 |
528276000 | Metal atom in elemental form | 3 |
20090082541 | Method for the Production Polyester with Improved Melting Properties and Crystallization Properties - The method for the production of a polyester with improved melting properties and crystallisation properties comprises the steps of (a) production of a pre-polyester melt with an average molecular weight (Mn) of 2000 to 16000 g/mol, (b) solidifying and shaping the melt into pre-polyester particles, and (c) thermally treating the pre-polyester particles in a solid phase in the presence of a transesterification catalyst whereby a molecular weight increase (ΔMn) of more than 2000 g/mol occurs. In addition, the prepolyester particles have a carboxyl end group content (XCOOH) of between 0.25 and 0.6 before step c and during the thermal treatment step c, the proportion of the esterification reaction (E) to the polycondensation reaction (E+T) is between 0.5 and 1. | 03-26-2009 |
20090131627 | POLYESTER POLYMER PARTICLES HAVING A SMALL SURFACE TO CENTER MOLECULAR WEIGHT GRADIENT - There is now provided a polyester polymer particle having an It.V., a surface, and a center, wherein the It.V. at the surface of the particle is less than 0.25 dL/g higher than the It.V. at the center of the particle. The polyester polymer particle is desirably crystalline to prevent the particles from sticking to each other while drying, and desirably contains less than 10 ppm acetaldehyde. A polyester container, preferably a preform or beverage bottle, is made by feeding crystallized polyester particles having an It.V. of at least 0.70 dL/g to an extrusion zone, melting the particles in the extrusion zone to form a molten polyester polymer composition, and forming a sheet or a molded part from extruded molten polyester polymer, wherein at least a portion of the polyester particles have an It.V. at their surface which does not vary from their It.V. at their center by more than 0.25 dL/g, and the particles have not been solid state polymerized. Such polyester compositions have an It.V. suitable for containers, yet lose less It.V. during melt processing than existing polyesters. | 05-21-2009 |
20120136132 | PROCESS FOR CONTINUOUS PREPARATION OF HIGH MOLECULAR WEIGHT POLYESTERS BY ESTERIFICATION OF DICARBOXYLIC ACIDS AND/OR TRANSESTERIFICATION OF DICARBOXYLIC ACIDS WITH DIOLS AND/OR MIXTURES THEREOF AND AN APPARATUS THEREFOR - The present invention relates to a method for the continuous production of high-molecular polyesters by esterification of dicarboxylic acids and/or transesterification of dicarboxylic acid esters with diols and/or mixtures thereof in the presence of catalysts with formation of a prepolymer in a tower reactor and polycondensation thereof to form a high-molecular polyester in a polycondensation reactor, a prepolymer with >40 to 70 repeat units (DP) being produced in the tower reactor and this prepolymer being polycondensed in only one further reactor to form a polyester with >150 to 205 DP. | 05-31-2012 |
528277000 | Material contains a transition metal atom | 47 |
20130253165 | METHOD FOR PRODUCING POLYESTER COMPOSITIONS - A process of producing a polyester composition includes carrying out an esterification reaction of a dicarboxylic acid component with a diol component, and then carrying out a polycondensation reaction, wherein the diol component is added twice or more during a time from completion of the esterification reaction until beginning the polycondensation reaction, and alkali metal phosphate is added with an amount of COOH terminal groups of an esterification reactant being not more than 150 eq/ton. | 09-26-2013 |
528278000 | Metal atom has atomic number of 57-71, or 89 and higher | 1 |
20120271030 | Catalyst and Process - A catalyst composition comprises the reaction product of an alkoxide or condensed alkoxide of a metal M, selected from titanium, zirconium, hafnium, aluminium, or a lanthanide, an alcohol containing at least two hydroxyl groups, a 2-hydroxy carboxylic acid and a base, wherein the molar ratio of base to 2-hydroxy carboxylic acid is in the range 0.01-0.79:1. The composition is useful as a catalyst for esterification reactions, especially for the production of polyesters such as polyethylene terephthalate, polytrimethylene terephthalate and polybutylene terephthalate. | 10-25-2012 |
528279000 | Material contains a Group IVB metal atom (Ti, Zr, Hf) | 44 |
20080293912 | High molecular weight polyester polymers with reduced acetaldehyde - Polyester compositions, especially polyethylene terephthalate homopolymer and copolymers, are disclosed containing titanium catalysts and catalyst deactivator added late in the manufacturing processing having reduced acetaldehyde generation rates. The polyester compositions are low in free acetaldehyde, making them suitable for fabrication into beverage containers for relatively tasteless beverages such as bottle water. Furthermore, the polyesters are polymerized to a high inherent viscosity in reduced processing time, without the necessity of further polymerization in the solid state, and in the absence of acetaldehyde scavengers leading to polyester polymers having reduced color. | 11-27-2008 |
20080300379 | POLYCARBONATE-POLYESTER BLOCK COPOLYMER COMPOSITIONS, METHODS, AND ARTICLES - A polycarbonate-polyester block copolymer includes a polycarbonate block and a polyester block, each having specific structures. The block copolymer can be prepared, at least in part, from renewable feedstocks. In some forms, the block copolymer includes biodegradable segments that facilitate structural breakdown of objects molded from the block copolymer. Methods of preparing the block copolymer are described as are- compositions that include it and articles prepared from it. | 12-04-2008 |
20090005531 | Solid state polymerization process for polyester - Disclosed is a method for increasing the solid state polymerization (SSP) rates of organic titanate catalyzed polyester. The method comprises in a first step, reacting a dicarboxylic acid or a C | 01-01-2009 |
20090069529 | Titanium oxide sol and process for producing polyalkylene terephthalate therewith - An object of the present invention is to provide an environmentally friendly polymerization catalyst of polyalkylene terephthalate which does not use a heavy metal such as antimony. Another object of the present invention is to provide the method of producing polyalkylene terephthalate using the catalyst. | 03-12-2009 |
20090069530 | POLYESTER FOR TONER - A polyester for a toner, obtainable by polycondensing an alcohol component and a carboxylic acid component containing a (meth)acrylic acid-modified rosin; and a toner containing the polyester for a toner. The polyester for a toner of the present invention is usable as a resin binder for a toner usable in, for example, developing electrostatic latent images formed in electrophotography, electrostatic recording method, electrostatic printing method or the like. | 03-12-2009 |
20090076242 | CATALYST FOR POLYESTER POLYCONDENSATION AND METHOD FOR PRODUCING POLYESTER RESIN USING THE SAME - The invention provides: a polycondensation catalyst for polyester production, which contains titanium atoms, alkaline earth metal atoms and phosphorus atoms, has high reactivity and excellent long-term storage stability, can be easily produced industrially, and has an advantage in cost; a polyester resin obtained with the catalyst; and a molded article. These are: a polymerization catalyst for polyester production containing titanium atoms, alkaline earth metal atoms and phosphorus atoms and having a specific constitution; a polyester resin obtained with the catalyst; and a molded article. | 03-19-2009 |
20090137769 | MANUFACTURING METHOD OF POLYETHYLENE TEREPHTHALATE - A problem of the invention is to provide polyethylene terephthalate, a molded article of which has low acetaldehyde content and oligomer content. | 05-28-2009 |
20100105858 | SOLID ACID CATALYST FOR PRODUCTION OF POLYESTER, PROCESS FOR PRODUCTION OF THE CATALYST, AND PROCESS FOR PRODUCTION OF POLYESTER USING THE CATALYST - The present invention relates to a solid acid catalyst for the production of polyester which enables the production of a metal-free polyester resin containing no residual catalyst, exhibits favorable utility efficiency in the production, exhibits extremely high selectivity for the polyesterification reaction with the amount of by-products being below the limit of detection, and is able to be isolated, recovered and reused. In other words, the present invention relates to a solid acid catalyst for the production of polyester, obtained by supporting a metal oxide (B) on a support (A) formed from a metal oxide, wherein said support (A) formed from a metal oxide is a zirconia, said metal oxide (B) is a molybdenum oxide, and a Hammett acidity function (H | 04-29-2010 |
20100152408 | MANUFACTURING METHOD OF BIODEGRADABLE WATER-BASED POLYESTER RESIN - The present invention relates to a method for preparing a biodegradable water soluble polyester resin, more specifically relates to a method for preparing a biodegradable water soluble polyester resin using a non-toxic catalyst. The method of the present invention uses a tri-component catalyst consisting of citric acid-Ti—Zn to accelerate a reaction velocity while avoiding use of a prior toxic catalyst. | 06-17-2010 |
20100249363 | Process for Preparing Polyethylenenaphthalate with 2,6-Naphthalenedicarboxylic Acid - The present invention relates to a process for preparing polyethylene naphthalate, comprising the steps of: esterifying 2,6-naphthalene dicarboxylic acid and ethylene glycol, or glycols using the two materials as major material to obtain prepolymer which comprises bis(beta-hydroxyethyl)naphthalate or low polymer as main material; and performing polycondensation reaction to thereby prepare polyethylene naphthalate. The process of the present invention has advantages of: enabling esterification with a low molar ratio of ethylene glycol to reduce reaction time, thereby increasing process efficiency; minimizing formation of side reaction products to improve properties; and preventing deterioration of the products by performing polycondensation at a low temperature to thereby obtain polyethylene naphthalate polymers of high quality. | 09-30-2010 |
20100305296 | Catalyst for Producing Polyester and Method for Producing Polyester - The invention relates to an improved linear microdialysis probe comprising a continuous length of flexible tubing ( | 12-02-2010 |
20110034662 | METHOD FOR THE CONTINUOUS PRODUCTION OF BIODEGRADABLE POLYESTERS - The present invention relates to a process for the continuous production of a biodegradable polyester based on aliphatic or aliphatic and aromatic dicarboxylic acids and on aliphatic dihydroxy compounds, where
| 02-10-2011 |
20110054143 | BINDER COMPOSITIONS AND ASSOCIATED METHODS - Disclosed are formaldehyde-free, thermally-curable, alkaline, aqueous binder compositions, curable to formaldehyde-free, water-insoluble thermoset polyester resins, and uses thereof as binders for non-woven fibers and fiber materials. | 03-03-2011 |
20110213116 | PREPARATION OF LOW-ACID POLYALKYLENE TEREPHTHALATE AND PREPARATION OF MACROCYCLIC POLYESTER OLIGOMER THEREFROM - The invention provides methods and systems for manufacturing low-acid polyalkylene terephthalate, for example, polybutylene terephthalate (PBT). The invention also provides methods and systems for preparing macrocyclic polyester oligomer (MPO) from low-acid polyalkylene terephthalate. Finally, the invention provides methods and systems for preparing MPO via reaction of a diol and a dialkyl ester in an organic solvent to form non-isolated, low-acid polyalkylene terephthalate which undergoes cyclization (depolymerization) to form MPO. | 09-01-2011 |
20110301322 | CATALYST FOR POLYESTER POLYCONDENSATION AND METHOD FOR PRODUCING POLYESTER RESIN USING THE SAME - The invention provides: a polycondensation catalyst for polyester production, which contains titanium atoms, alkaline earth metal atoms and phosphorus atoms, has high reactivity and excellent long-term storage stability, can be easily produced industrially, and has an advantage in cost; a polyester resin obtained with the catalyst; and a molded article. These are: a polymerization catalyst for polyester production containing titanium atoms, alkaline earth metal atoms and phosphorus atoms and having a specific constitution; a polyester resin obtained with the catalyst; and a molded article. | 12-08-2011 |
20120010382 | PROCESS FOR MAKING THERMOPLASTIC POLYESTERS - The invention relates to a process for making a thermoplastic polyester, which comprises contacting at least one carboxylic acid-based compound and at least one alcohol-based compound in esterification and subsequent polycondensation reactions, in the presence of certain exfoliated inorganic nano-layered titanates acting as a catalyst. | 01-12-2012 |
20120059142 | PREPARING POLYESTER ALCOHOLS - A process for preparing polyester alcohols by condensation of polytetrahydrofuran with aromatic dicarboxylic acids and/or their anhydrides and/or their esters, preferably isophthalic acid, phthalic acid and terephthalic acid and more preferably isophthalic acid, in the presence of a transesterification catalyst in a multi-stage operation at different pressure levels with at least one reaction stage at atmospheric pressure and at least one reaction stage at reduced pressure, where distillate is removed from the reaction system, comprises deactivating the catalyst after the polycondensation by using phosphoric acid in a molar ratio of 1:1 to 1:3.5 for catalyst to phosphoric acid. | 03-08-2012 |
20120088898 | Catalyst mixture and method for the production of polyesters with high viscosity - Provided are a catalyst mixture and also a method for the production of a polyester melt with high viscosity, the granulate obtained therefrom having an intrinsic viscosity of >0.70 dl/g and an L* colour >70 and the b* colour being between −5 and +5. The catalysts being used during the production are not based on heavy metals but on titanium compounds. Also no components of catalysts based on heavy metal are added. The granulate can be processed further in any way, e.g. to form bottles, containers, films, foils or fibres. | 04-12-2012 |
20120136133 | POLYCONDENSATION CATALYST FOR PRODUCING POLYESTER AND METHOD FOR PRODUCING THE SAME AND METHOD FOR PRODUCING POLYESTER - The invention provides a method for producing a catalyst for producing polyester by an esterification reaction or a transesterification reaction between a dicarboxylic acid or an ester-forming derivative thereof and a glycol, the method comprising hydrolyzing an organic titanium compound in an organic solvent in which particles of a solid base are dispersed thereby to form a coat layer of titanic acid on the surface of the particles of a solid base. | 05-31-2012 |
20120172571 | POLYCONDENSATION CATALYST FOR PRODUCING POLYESTER AND METHOD FOR PRODUCING POLYESTER USING THE SAME - The invention provides a polycondensation catalyst for producing polyester by an esterification reaction or a transesterification reaction between a dicarboxylic acid or an ester-forming derivative thereof and a glycol, the polycondensation catalyst being obtained by hydrolyzing a water soluble titanium compound in the absence of a water soluble alkali in an aqueous slurry in which particles of a solid base are dispersed thereby to form on the surface of the particles of the solid base a coat layer of titanic acid in a content of from 0.1 to 50 parts by weight in terms of TiO | 07-05-2012 |
20120302721 | Methods for Preparation of Macrocyclic Polyester Oligomer via Heterogeneous Catalysis - The invention relates to methods and systems for preparing macrocyclic polyester oligomer (MPO) directly from monomer via heterogeneous catalysis, rather than by depolymerizing a polyester. For example, in an exemplary embodiment, cyclic poly(butylene terephthalate) (cPBT) is produced by reacting butanediol (BDO) and dimethylterephthalate (DMT) in an organic solvent—for example, ortho-dichlorobenzene (oDCB). The mixture flows over (or otherwise contacts) the catalyst-coated fiberglass or silica gel, e.g., which is packed in a column or bed. MPO is produced in the reaction mixture, while residual linears and catalyst residue remain in the column/bed. | 11-29-2012 |
20120316315 | Method for Preparing Modified Poly (1,3-propanediol terephthalate) - A method is disclosed herein for the preparation of modified poly (1,3-propanediol terephthalate). The method comprises adding linear polyester with average molecular weight of 800˜3000 and polyethylene glycol with average molecular weight of 200˜2000 into polymerization monomers before polymerization reaction, wherein the linear polyester is a polymer obtained by reaction of C | 12-13-2012 |
20120316316 | TITANIUM-BASED CATALYST SHOWING EXCELLENT ACTIVITY AND SELECTIVITY IN POLYCONDENSATION REACTIONS - Method for producing polyesters using titanium atrane catalysts is disclosed. Also disclosed are methods for making the titanium atrane catalysts. The titanium atrane catalysts are useful as esterification and/or polycondensation catalysts, have similar activity, color and byproduct formation as conventional catalyst systems, but with reduced toxicity and regulatory concerns. | 12-13-2012 |
20130018165 | Method for Preparing Polytrimethylene Terephthalate with Sustained-Release CrystallinityAANM Bian; ShuchangAACI WujiangAACO CNAAGP Bian; Shuchang Wujiang CN - A method is disclosed herein for the preparation of polytrimethylene terephthalate with sustained-release crystallinity. The method reduces crystallization rate and crystallinity-saturation ratio of polytrimethylene terephthalate during spinning, through addition of a third monomer during the esterification reaction step. The third monomer acts as copolymerization component generating intermolecular steric hindrance; the identity of which selects from one or more as combinations of the following: trimellitic anhydride, non-para aromatic dicarboxylic acid, C | 01-17-2013 |
20130281653 | N-Heterocyclic Carbene Based Zirconium Complexes For Use In Lactones Ring Opening Polymerization - This invention is reporting new N-heterocyclic carbene based zirconium (or hafnium) complexes and their uses as catalysts for the lactones ring opening polymerization. These new catalysts are robust and versatile and exert control over polymer molecular weight and/or stereochemistry and exhibit high reactivity (cf. for low temperature applications). In particular the new catalysts show both enhanced activity and at the same time a better selectivity than the catalysts employed by the prior art. | 10-24-2013 |
20140005350 | NOVEL TITANIUM GLYCOLATE CATALYST AND PROCESS FOR THE PREPARATION THEREOF | 01-02-2014 |
20140018511 | METHOD FOR PRODUCING POLYMER, METHOD FOR PRODUCING ORGANIC ACID, AND ORGANIC ACID-PRODUCING MICROORGANISM - The present invention provides a method of producing a polymer, which comprises the step of performing a polymerization reaction using, as a starting material, an organic acid obtained by allowing a microorganism or a treated cell thereof to act on an organic raw material, wherein said microorganism has an ability to produce an organic acid and has been modified so as to produce less aromatic carboxylic acid as compared to an unmodified strain. | 01-16-2014 |
20140073758 | POLYCONDENSATION CATALYST FOR PRODUCING POLYESTER AND PRODUCTION OF POLYESTER USING THE POLYCONDENSATION CATALYST - The invention provides a polycondensation catalyst for producing polyester by an esterification reaction or a transesterification reaction between a dicarboxylic acid or an ester-forming derivative thereof and a glycol, wherein the polycondensation catalyst comprises particles of a solid base having on the surfaces an inner coating layer of titanic acid in an amount of from 0.1 to 50 parts by weight in terms of TiO | 03-13-2014 |
20140288261 | CATALYST FOR SYNTHESIZING POLYESTER RESIN AND METHOD OF MANUFACTURING POLYESTER RESIN USING THE SAME - A catalyst used to manufacture a biodegradable polyester resin, in particular, an organic titanium catalyst which does not contain a heavy-metal component, and a method of manufacturing a polyester resin using the same. Accordingly, the method of manufacturing a polyester resin can be useful in attaining desired physical properties without using a catalyst harmful to environments and a human body. The biodegradable resin, which can be safely used in the field of applications in which the use of harmful components is a sensitive issue without using the components harmful to environments and a human body during the manufacture of a resin, can be prepared. | 09-25-2014 |
20140364580 | METAL ALKOXIDE COMPLEX, CATALYST COMPOSITION, AND PRODUCTION METHOD OF POLYCAPROLACTONE OR POLYLACTIDE - The invention provides a metal alkoxide complex of Formula (I), wherein X, M, R1, R2, R3, m, n, y and z are as defined in the Description. The invention also provides a catalyst composition comprising the metal alkoxide complex and a hydroxy-containing compound, wherein the molar ratio of the metal alkoxide complex to the hydroxy-containing compound is 1:01-1000. The invention also provides a production method of poly-ε- caprolactone or polyactide, wherein an ε-caprolactone monomer or a lactide monomer is reacted in the presence of the metal alkoxide complex or catalyst composition to obtain poly-ε-caprolactone or polylactide. The metal alkoxide complex and the catalyst composition thereof can be used to catalyze the synthesis of poly-ε- caprolactone or polylactide with a high efficiency. The molecular weight of polycaprolactone or polylactide can be controlled by the molar ratio of the metal alkoxide complex and the hydroxy-containing compound, and is adjustable in the range of 1000-600,000, and wherein the molecular weight distribution is from 1.03 to 1.50. | 12-11-2014 |
20140378644 | METHODS FOR PREPARATION OF MACROCYCLIC POLYESTER OLIGOMER VIA HETEROGENEOUS CATALYSIS - The invention relates to methods and systems for preparing macrocyclic polyester oligomer (MPO) directly from monomer via heterogeneous catalysis, rather than by depolymerizing a polyester. For example, in an exemplary embodiment, cyclic poly(butylene terephthalate) (cPBT) is produced by reacting butanediol (BDO) and dimethylterephthalate (DMT) in an organic solvent—for example, ortho-dichlorobenzene (oDCB). The mixture flows over (or otherwise contacts) the catalyst-coated fiberglass or silica gel, e.g., which is packed in a column or bed. MPO is produced in the reaction mixture, while residual linears and catalyst residue remain in the column/bed. | 12-25-2014 |
20150018512 | SINGLE-POT PROCESS FOR THE PRODUCTION OF POLYESTER-CO-CARBONATE POLYOLS - Polyester-co-carbonate polyols and methods for producing the same are provided. The method comprises reacting one or more alcohols having an OH functionality of two or more with one or more organic diacids to form a reaction mixture, adding a first amount of dialkyl carbonate to the reaction mixture to remove water remaining from the reaction mixture by azeotropic drying, adding a transesterification catalyst to the dialkyl carbonate containing reaction mixture and adding a second amount of dialkyl carbonate to the catalyst containing reaction mixture. | 01-15-2015 |
20150045530 | CATALYST SOLUTION FOR USE IN PRODUCTION OF POLYESTER, AND METHOD FOR PRODUCING POLYESTER RESIN USING SAME - A catalyst solution for polyester production includes a titanium compound (A) and an organic solvent (B), wherein particle diameter of particles included in the solution, which is measured by dynamic light scattering method and is subsequently determined by cumulant analysis method, is not greater than 200 nm. | 02-12-2015 |
20150051366 | COMPLEX METAL OXIDE, AND METHOD OF PREPARING POLYESTER USING THE SAME - Disclosed herein are a novel complex metal oxide catalyst, and a method of preparing polyester using the same. The metal-bound compound of the present invention has a higher catalytic activity as compared to an antimony catalyst and existing titanium catalysts to be easily synthesized and stabilized, have a sufficient polymerization activity even with a small amount, and be used as an environmentally friendly catalyst for polyester polymerization. In addition, when preparing polyester by using the complex metal oxide of the present invention, since catalytic activity caused by phosphorus (P) which is a thermal stabilizer used to decrease pyrolysis at the time of hot-melting and molding is not deteriorated, an excessive amount of phosphorus may be used as compared to the related art, such that pyrolysis less occurs, whereby the yellowing phenomenon may be decreased and high viscosity may be maintained. Therefore, the complex metal oxide may be usefully applied to the preparation of polyester having good physical properties, in particular, polyethylene terephthalate. | 02-19-2015 |
20150057424 | POLYMERS, THE PROCESS FOR THE SYNTHESIS THEREOF AND COMPOSITIONS COMPRISING SAME - The present invention relates to copolymers, in particular poly(butylenesuccinate-co-furanoate) (PBSF) copolymers, which have advantageous mechanical properties, and also to polymeric compositions comprising them. It also relates to a process for preparing these polymers. | 02-26-2015 |
20150057425 | PROCESS 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
| 02-26-2015 |
20150065678 | METHOD FOR THE PRODUCTION OF ALIPHATIC POLYESTERS - The present invention relates to a method for the production of aliphatic polyesters in a two-step method. There are thereby added, in a first step, to a precondensate of an aliphatic dicarboxylic acid or to a mixture of aliphatic dicarboxylic acids and an aliphatic dialcohol or to a mixture of aliphatic dialcohols, further monomeric components, i.e. further aliphatic dicarboxylic acids and also a further aliphatic dialcohol, a polyester prepolymer being obtained. In a further step, polycondensation of the prepolymer obtained in the first step is effected. | 03-05-2015 |
20150073117 | 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. | 03-12-2015 |
20150307657 | METHOD FOR CONTINUOUS PRODUCTION OF BIODEGRADABLE ALIPHATIC/AROMATIC POLYESTER COPOLYMER - A continuous preparation method of a biodegradable aliphatic/aromatic polyester copolymer includes: performing a first esterification reaction of an aliphatic dihydroxy compound with an aliphatic dicarboxylic acid at a temperature of 185° C. or less; continuously performing a second esterification reaction of a reaction product from the first esterification reaction; continuously performing a first polycondensation reaction of a reaction product from the second esterification reaction to obtain a prepolymer; continuously performing a second polycondensation reaction of the prepolymer to obtain a second polycondensation reaction product having an intrinsic viscosity from about 0.9 dl/g to about 1.0 dl/g; and continuously performing a third polycondensation reaction of the second polycondensation reaction product to prepare the biodegradable aliphatic/aromatic polyester copolymer, wherein the performing of the first esterification reaction or the continuously performing of the second esterification reaction includes adding an aromatic carboxylic acid. The biodegradable aliphatic/aromatic polyester copolymer prepared by control of the intrinsic viscosity of the second polycondensation reaction product may be improved in processibility, film formability, tensile/tearing strength, and blending ability with another polymer resin. Use of a less amount of the aliphatic dihydroxy compound as a starting material may reduce manufacturing costs. | 10-29-2015 |
20160075820 | SYNTHESIS AND MOLECULAR WEIGHT CONTROL OF ALIPHATIC POLYESTER DIOLS - The synthesis of certain polyester diols (PEDs) is disclosed. This application also discloses the purification and polymerization kinetics of lipid based PEDs. Molecular weight and distribution controls were achieved by initial and induced stoichiometric imbalance and optimization of the purification protocol. Thermal degradation and thermal transition behavior of the PEDs were also investigated by TGA and DSC. | 03-17-2016 |
20160096917 | METHOD FOR SYNTHESIZING POLY(BUTYLENE SUCCINATE-CO-BUTYLENE ADIPATE) - A method for synthesizing poly(butylene succinate-co-butylene adipate) (PBSA), including: a) adding raw materials including succinic acid, adipic acid, and 1,4-butanediol into a reaction still; increasing the temperature in the reaction still to 130° C., and stiffing the raw materials, then keeping the temperature in the reaction still at 170-200° C., and dehydrating for 1-3 hours at atmospheric pressure, to yield an oligomer of PBSA; and b) decreasing the temperature of the reaction still to 100° C., and adding a composite catalyst system, the total addition of the composite catalyst system accounting for one ten-thousandth to one ten-millionth of a total weight percentage of the raw materials; uniformly stiffing and mixing the composite catalyst system and reactants, slowly vacuum pumping the reaction still, heating the reaction still to a temperature of 200-240° C. and allowing the composite catalyst system and the reactants to react for 10-20 hrs. | 04-07-2016 |
20160108068 | METHOD FOR THE PRODUCTION OF A TITANIUM CONTAINING CATALYST, TITANIUM CONTAINING CATALYST, METHOD FOR THE PRODUCTION OF POLYESTER AND POLYESTER - The present invention is directed to a method for the production of a titanium containing catalyst, wherein a titanium-(IV)-alkoxide of high purity is reacted with an alpha-hydroxy carboxylic acid. Furthermore the invention concerns a titanium containing catalyst allowing for the production of high viscosity polyesters with high thermal stability. In addition, the invention is directed to a method for the production of polyesters and polyesters themselves. | 04-21-2016 |
20160376402 | METHOD FOR SYNTHESIZING POLY(BUTYLENE SUCCINATE) CATALYZED BY BIOGENIC GUANIDININE - A method for synthesizing poly(butylene succinate) (PBS) having a weight average molecular weight (M | 12-29-2016 |
20160376403 | METHOD FOR SYNTHESIZING POLY(BUTYLENE ADIPATE-CO-TEREPHTHALATE) - A method for synthesizing poly(butylene adipate-co-terephthalate) by combination of melt and solid state polycondensation using an organic guanidine as a main catalyst. The ternary catalyst system includes a main catalyst, a first cocatalyst, and a second cocatalyst. The main catalyst is organic guanidine; the first cocatalyst is titanate ester or zirconate ester; and the second cocatalyst is metallic oxide. The method includes: 1) adding 1,4-butanediol (BDO), adipic acid (AA), terephthalic acid (TA), and a ternary catalyst system to a reaction still; conducting an oligo-polycondensation to yield a oligomer having the weight average molecular weight (M | 12-29-2016 |
528280000 | Material contains a Group VIII metal atom (Fe, Co, Ni, Ru, Rh, Pd, Os, Ir, Pt) | 1 |
20130331542 | PROCESS FOR PREPARING HYPERBRANCHED POLYESTERS - An efficient, eco-friendly, solvent-free process for preparing hyperbranched polyesters by reacting polyols with polycarboxylic acid in the presence of heterogeneous, reusable, acid, crystalline, micro-mesoporous double-metal cyanide catalyst at moderate temperatures and short period of reaction time. | 12-12-2013 |
528281000 | Material contains a Group IIB metal atom (Zn, Cd, Hg) | 9 |
20100105859 | METHOD FOR PRODUCING LACTIC ACID POLYMERS OF HIGH CRYSTALLINITY AND MOLECULAR WEIGHT - The invention relates to a process for preparing lactic acid polymers of highly crystallinity and molecular weight, the process comprising melt polymerization of a lactide to form prepolymers having active end groups followed by solid state polymerization. The polymerization is carried out in the presence of a catalyst complex comprising a lactide, an organic metal-oxo compound and a lactic acid oligomer. The residual lactide after the melt polymerization is removed by heating the reaction mixture in the temperature range of 98° C. to a temperature less than the melting point of the prepolymer. The metal to oligomer ratio in the catalyst complex is in the range of 0.1 to 10, preferably in the range of 0.5 to 5, more preferably in the range of 0.8 to 1.5 | 04-29-2010 |
20120071625 | PROCESS FOR MAKING POLYETHYLENE TEREPHTHALATE - The invention relates to a process for making polyethylene terephthalate (PET) from ethylene glycol (EG), purified terephthalic acid (PTA) and optionally up to 30 mol % comonomer, using a catalyst system essentially consisting of antimony—(Sb), zinc—(Zn) and phosphorous—(P) compounds, comprising the steps of a) esterifying EG and PTA to form diethyleneglycol terephthalate and oligomers (DGT), and b) melt-phase polycondensing DGT to form polyester and EG1 wherein the Sb- and P-compounds are added in step a) and the Zn-compound is added after step a). With this process PET can be obtained that shows favourable colour and optical clarity, also if recycling of EG is applied in the process, and a relatively low rate of acetaldehyde re-generation during melt-processing. | 03-22-2012 |
20130144027 | ISOCYANATE-FREE METHOD FOR PREPARING POLY(CARBONATE-URETHANE) OR POLY(ESTER-URETHANE) - The present invention discloses a method for preparing polycarbonate-urethane) or poly(ester-urethane) without isocyanate | 06-06-2013 |
20130158227 | PROCESS FOR SYNTHESIZING A NEW CATALYST COMPLEX FOR THE PRODUCTION OF POLYETHYLENE TEREPHTHLATE - This invention relates to a process of preparing a catalyst for the production of polyethylene terephthalate and for the production of high molecular weight PET comprising:
| 06-20-2013 |
20140323683 | PROCESS FOR THE PREPARATION OF DEFINED FUNCTIONAL LACTIC ACID OLIGOMERS - A process for manufacturing defined functional lactic acid oligomers can include contacting lactide with at least one compound that is a transfer agent. Oligomers can be prepared according to the process. | 10-30-2014 |
20150141612 | PREPARATION METHOD OF POLYESTER RESIN - The present invention provides a polyester resin including: moieties of dicarboxylic acid components including terephthalic acid; and moieties of diol components including isosorbide, a cyclohexanedimethanol, and the balance of other diol compounds. The polyester resin contains a zinc-based catalyst and a phosphorus-based stabilizer. The present invention also provides a method for preparing the polyester resin. The method includes: esterifying diol components including isosorbide, a cyclohexanedimethanol, and the balance of other diol compounds, with dicarboxylic acid components including terephthalic acid in the presence of an esterification reaction catalyst including a zinc compound; adding a phosphorus-based stabilizer to the esterification reaction mixture at the time when the degree of esterification reaches at least 80%; and subjecting the esterification reaction product to polycondensation. | 05-21-2015 |
20150148515 | POLYESTER RESIN AND METHOD FOR PREPARING THE SAME - There is provided a polyester resin including: moieties of dicarboxylic acid components including terephthalic acid; and moieties of diol components including 5 to 60 mole % of isosorbide, 10 to 80 mole % of a cyclohexanedimethanol, and the balance of other diol compounds, wherein the polyester resin has an intrinsic viscosity of 0.5 to 1.0 dl/g and oxygen permeability of less than 20 cc*mm/(m | 05-28-2015 |
20150148516 | PROCESS FOR IMMORTAL RING-OPENING POLYMERISATION OF CYCLIC ESTERS AND CYCLIC CARBONATES - The present invention discloses new catalyst systems based on complexes of divalent metals supported by chelating phenoxy ligands for immortal ring-opening polymerisation of cyclic esters and cyclic carbonates. | 05-28-2015 |
20150307656 | POLYMERIZATION METHOD - A novel polymerisation method employing novel cationic Zinc-complexes as catalyst is devised. | 10-29-2015 |
528282000 | Material contains a Group IIIA metal atom (Al, Ga, In, Tl) | 3 |
20130030144 | STAR POLYMERS HAVING CONTROLLED TACTICITY AND METHODS OF MAKING SAME - Disclosed is a method for synthesizing star polymers having controlled tacticity. The method comprises reacting a lactone-based monomer having at least one stereocentre and a poly-functional initiator in the presence of at least one catalyst. In particular embodiments, the lactone-based monomer is L-lactide or DL-lactide, the poly-functional initiator is dipentaerythritol, and the at least one catalyst is an aluminum-salen catalyst ( | 01-31-2013 |
20130267674 | POLYESTER RESIN - The present invention provides a polyester resin obtained by using an aluminum compound and a phosphorus compound as a polymerization catalyst, containing greater than or equal to 85% by mol of an ethylene terephthalate structural unit, wherein the content of an aluminum-based contaminant with respect to the mass of the polyester resin is less than or equal to 100 ppb, and the content of a phosphorus compound represented by a specific structure is 5 to 11 ppm. The present invention is able to provide a polyester resin capable of keeping high transparency of the molded body when it is sequentially polymerized and produced on a commercial scale, and having such characteristics that crystallization of a mouth plug part can be easily controlled when it is used for a heat resistant bottle, and whitening is less likely to occur at the time of heating in molding when it is used as a sheet for molding. | 10-10-2013 |
20160053048 | CATALYST FOR POLY(LACTIDE) SYNTHESIS AND USES THEREOF - Catalysts for poly(lactide) synthesis are provided herein. Also provided are methods of synthesizing the catalysts, methods of using the catalysts to make poly(lactides), and compositions comprising the same. | 02-25-2016 |
528283000 | Material contains a Group IVA metal atom (Ge, Sn, Pb) | 10 |
20080214774 | Thiourethane Compositions and Processes for Making and Using Same - Thiourethane prepolymer compositions, thiourethane polymer compositions, methods of making the compositions, and methods of using the thiourethane polymer compositions are provided. The thiourethane polymer composition can be produced by contacting a thiol ester composition and an isocyanate composition to produce a prepolymer composition and then curing the prepolymer composition to produce the thiourethane polymer composition. The prepolymer composition can also include a property modifying agent. In some embodiments, the thiol ester compositions include thiol esters, hydroxy thiol esters, and cross-linked thiol esters. | 09-04-2008 |
20090118459 | BRANCHED BIODEGRADABLE POLYMERS, A MACROMONOMER, PROCESSES FOR THE PREPARATION OF SAME, AND THEIR USE - The present invention relates to a process for the preparation of branched biodegradable polymers comprising of the steps of: (a) preparing a macromonomer by ring-opening polymerization of at least one cyclic ester, cyclic carbonate, and/or cyclic carboxyanhydride in the presence of a branching agent and optionally a catalyst; and (b) subsequent polycondensation of the macromonomer, to a process for the preparation of a macromonomer by ring-opening polymerization of at least one cyclic ester, carbonate and/or N-carboxyanhydride in the presence of a defined branching agent and optionally a catalyst, according to step (a), and to the prepared macromonomer and branched biodegradable polymer and their uses. | 05-07-2009 |
20090198038 | Novel Catalysts for the Polymerisation of Carbonyl-Containing or Cyclic Monomers - The present invention relates to metal/organic complexes of Formula (I), (II), (III), (IV), (V) and (VI) that are useful as catalysts for the polymerisation of carbonyl-containing or cyclic monomers. Typical polymerisation reactions are, for example, those of lactides. R is independently selected at each occurrence from the group comprising: hydrogen, hydrocarbyl and substituted hydrocarbyl, M is a Lewis-acidic metal, and, if present, X is any suitable counter ion. | 08-06-2009 |
20100298523 | Polyester Compositions Which Comprise Cyclobutanediol and at Least One Phosphorus Compound - The present invention relates to a process for making polyester compositions containing: (I) at least one polyester which comprises: (a) a dicarboxylic acid component comprising: (i) 70 to 100 mole % of terephthalic acid residues; (ii) 0 to 30 mole % of aromatic dicarboxylic acid residues having up to 20 carbon atoms; and (iii) 0 to 10 mole % of aliphatic dicarboxylic acid residues having up to 16 carbon atoms; and (b) a glycol component comprising: (i) 1 to 99 mole % of 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues; and (ii) 1 to 99 mole % of cyclohexanedimethanol residues; and (II) at least one thermal stabilizer chosen from at least one phosphorus compound, reaction products thereof, and mixtures thereof; wherein the total mole % of the dicarboxylic acid component is 100 mole %, and wherein the total mole % of the glycol component is 100 mole %; wherein the inherent viscosity of the polyester is from 0.35 to 1.2 dL/g as determined in 60/40 (wt/wt) phenol/tetrachloroethane at a concentration of 0.25 g/50 ml at 25° C., wherein the polyester has a Tg from 85 to 200 C. | 11-25-2010 |
20120214959 | ORGANOTIN COMPOUNDS, PREPARATION METHOD THEREOF, AND PREPARATION OF POLYLACTIDE RESIN USING THE SAME - The present invention relates to an organotin compound represented by R | 08-23-2012 |
20120289675 | POLYLACTIDE RESIN, METHOD OF PREPARING THE SAME, AND POLYLACTIDE RESIN COMPOSITION COMPRISING THE SAME - Disclosed are polylactide resin that may exhibit and maintain excellent mechanical properties, exhibit excellent heat resistance, and thus can be used for a semi-permanent use, a method for preparing the same, and a polylactide resin composition comprising the same. | 11-15-2012 |
20130090451 | POLYLACTIDE RESIN HAVING EXCELLENT HEAT RESISTANCE AND PREPARATION METHOD THEREOF - The present invention relates to a polylactide resin having excellent heat resistance, a preparation method thereof, and a polylactide resin composition including the same. | 04-11-2013 |
20140206834 | POLYLACTIDE RESIN HAVING EXCELLENT HEAT RESISTANCE AND PREPARATION METHOD THEREOF - The present invention relates to a polylactide resin having excellent heat resistance, a preparation method thereof, and a polylactide resin composition including the same. | 07-24-2014 |
20140213752 | PREPARATION METHOD OF POLYLACTIDE RESIN - The present invention relates to a preparation method of a polylactide resin, in which the preparation method includes the step of performing ring opening polymerization of lactide monomers in the presence of an organometallic catalyst and an aromatic monomer scavenger, and the aromatic monomer scavenger is used in an amount of 0.1 to 20 parts by weight, based on 100 parts by weight of the lactide monomers. | 07-31-2014 |
20160159977 | A Method for Manufacturing Poly(2-Hydroxyalkanoic Acid), and the Poly(2-Hydroxyalkanoic Acid) Obtainable Thereby - A method for manufacturing poly(2-hydroxyalkanoic acid), preferably a poly(lactic acid), is disclosed. The method comprises the steps of: mixing a cyclic diester of a 2-hydroxyalkanoic acid and a polymerization catalyst, polymerizing the cyclic diester to form poly(2-hydroxyalkanoic acid) in liquid phase, adding a peroxide-based compound as a catalyst deactivating agent to the liquid phase, applying a devolatilisation step to the liquid phase, and allowing the poly(2-hydroxyalkanoic acid) to solidify, characterized in that an end-capping agent is added to the poly(2-hydroxyalkanoic acid) in the liquid phase. The present invention also relates to a poly(2-hydroxyalkanoic acid), preferably a poly(lactic acid), obtainable with said method characterized in that the polymer has a Mn abs ranging between 10000 and 250000 g/mol, preferably between 20000 and 85000 g/mol. | 06-09-2016 |
528285000 | Material contains a Group VA metal atom (As, Sb, Bi) | 6 |
20100152409 | Triptycene Derivatives, Method for Synthesizing the Same and Application Thereof - Triptycene derivatives and method for preparing the same are provided. The triptycene derivatives may be triptycene di-ester of the formula (I) or triptycene di-acid of the formula (II): | 06-17-2010 |
20120101249 | HIGH IV MELT PHASE POLYESTER POLYMER CATALYZED WITH ANTIMONY CONTAINING COMPOUNDS - A melt phase process for making a polyester polymer melt phase product by adding an antimony containing catalyst to the melt phase, polycondensing the melt containing said catalyst in the melt phase until the It.V. of the melt reaches at least 0.75 dL/g. Polyester polymer melt phase pellets containing antimony residues and having an It.V. of at least 0.75 dL/g are obtained without solid state polymerization. The polyester polymer pellets containing antimony residues and having an It.V. of at least 0.70 dL/g obtained without increasing the molecular weight of the melt phase product by solid state polymerization are fed to an extruder, melted to produce a molten polyester polymer, and extruded through a die to form shaped articles. The melt phase products and articles made thereby have low b* color and/or high L* brightness, and the reaction time to make the melt phase products is short. | 04-26-2012 |
20140336349 | A PROCESS FOR PREPARING A POLYMER PRODUCT HAVING A 2,5-FURANDICARBOXYLATE MOIETY WITHIN THE POLYMER BACKBONE TO BE USED IN BOTTLE, FILM OR FIBRE APPLICATIONS - A process for preparing a polymer having a 2,5-furandicarboxylate moiety within the polymer backbone, and having a number average molecular weight of at least 25,000, includes a transesterification step, a polycondensation step, a drying and/or crystallizing step, and a step where the polymer is subjected to post condensation conditions, and to a polyester-containing bottle or film or fibre-containing woven or non-woven object made from melt-processing poly(ethylene-2,5-furandicarboxylate), where the poly(ethylene-2,5-furandicarboxylate) is obtainable by the process of the invention. | 11-13-2014 |
20150080544 | POLYESTER BLOW-MOLDED ARTICLE AND METHOD FOR MOLDING POLYESTER BLOW-MOLDED ARTICLE - The present invention is directed to a heat-resistant polyester blow-molded article made of a polyester resin composition containing 0.035 to 1.75 equivalent/ton of a hindered phenol structural unit and containing at least one selected from the group consisting of antimony compounds as a polymerization catalyst, the cyclic trimer content thereof being less than or equal to 0.5% by mass, the acetaldehyde content thereof being less than or equal to 50 ppm and the intrinsic viscosity thereof being 0.68 to 0.90 dL/g. The present invention enables efficient production of a molded article excellent in transparency and heat-resistant dimensional stability, in particular a heat-resistant blow-molded article. Moreover, according to the present invention, there are provided a polyester resin composition which is excellent in long-term continuous moldability and hardly stains a mold and a molded article prepared therewith, and a method for molding a polyester blow-molded article using the polyester resin composition. | 03-19-2015 |
20150329667 | Process For Manufacturing Polyethylene Terephthalate - The invention relates to a process for producing a polyester resin, said process comprises the steps of
| 11-19-2015 |
20160185900 | METHOD FOR PREPARING A MODIFIED COPOLYESTER - A method for preparing a modified copolyester includes the steps of: i) subjecting a mono(2-hydroxylalkyl)dicarboxylate to an esterification reaction with an isosorbide to form an intermediate; and ii) subjecting the intermediate to a condensation polymerization in the presence of a condensation polymerization catalyst. The method may enhance the reactivity of isosorbide, reduce the amount of water by-product, and raise the glass transition temperature and the color stability of the copolyester thus obtained. | 06-30-2016 |