| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 528196000 | With reactant having halo-C(=O)-halo, halo-C(=O)-O-, or -O-C(=O)-O- group | 69 |
| 20080242828 | Process for Producing Polycarbonate - Provided a process for producing a polycarbonate which comprises reacting an aqueous alkali solution of a dihydric phenol with phosgene in the presence of an organic solvent to produce a polycarbonate oligomer and subsequently polycondensing the oligomer, wherein an emulsion solution of a polycarbonate oligomer-containing organic solvent obtained in the polycarbonate oligomer production step is introduced into a coalescer to separate the emulsion solution into a polycarbonate oligomer-containing organic solvent phase and an aqueous phase, and the polycarbonate oligomer-containing organic solvent phase is subjected to polycondensation. Thus the emulsion solution of a polycarbonate oligomer-containing organic solvent obtained in the polycarbonate oligomer production step is efficiently separated to reduce the content of impurity-containing water in the oligomer for producing a polycarbonate having excellent quality and to a obtain wastewater having a low content of organic materials. | 10-02-2008 |
| 20080319156 | Process For The Preparation Of Polycarbonate By The Melt Transesterification Process - The invention provides a process for the preparation of polycarbonate by the melt transesterification process, polycarbonate having a low electrostatic charge obtainable by this process, and mouldings or extrudates, in particular optical data storage media or light-diffusing plates, made from this polycarbonate. | 12-25-2008 |
| 20090030171 | HIGH HEAT POLYCARBONATE COMPOSITIONS, METHODS FOR THE PREPARATION THEREOF, AND ARTICLES DERIVED THEREFROM - Melt blended compositions, comprising up to 20 wt % of an optional additive, and 80-100 wt % of a copolycarbonate having a Tg of 200° C. or more of (1) | 01-29-2009 |
| 20090043070 | COPOLYCARRBONATE-POLYESTERS, METHODS OF MANUFACTURE, AND USES THEREOF - A copolycarbonate-polyester, comprising units of formula | 02-12-2009 |
| 20090088549 | Monomer Solution for Producing Polycarbonate - A non-reactive monomer mixture has a monomer component dispersed in a melted diaryl carbonate. The monomer component has one or more monomer compounds having a melting point below the melting point of the diaryl carbonate. Furthermore, the monomer component has less than 600 ppb alkali metal, an acid stabilizer, or both less than 600 ppb alkali metal and an acid stabilizer. The monomer compounds of the monomer component and the diaryl carbonate are present in a mole ratio of from 0.9 to 1.1. The monomer mixture is at a temperature between the melting temperature of the lowest melting monomer compound and the melting temperature of the diaryl carbonate. | 04-02-2009 |
| 20090105444 | ALIPHATIC DIOL-BASED POLYCARBONATES, METHOD OF MAKING, AND ARTICLES FORMED THEREFROM - The above-described and other deficiencies of the art are met by a method of making a polycarbonate polymer comprising isosorbide carbonate units, comprising melt reacting a dihydroxy compound comprising an isosorbide of the general formula (2 | 04-23-2009 |
| 20090143560 | Optical Element and Achromatic Lens - There are provided an optical element that comprises a polymer which has a structural unit derived from a specific dihydroxy compound typified by 2,2-bis(4-hydroxyphenyl)-1,1,1,3,3,3-hexafluoro propane (bisphenol AF) and in which the relationship between a refractive index n | 06-04-2009 |
| 20090209724 | Process for industrially producing high-quality aromatic polycarbonate - It is an object of the present invention to provide a specific process that enables a high-quality high-performance aromatic polycarbonate having excellent mechanical properties and no discoloration to be produced industrially in a large amount (e.g. not less than 1 ton/hr) stably for a prolonged period of time (e.g. not less than 1000 hours, preferably not less than 3000 hours, more preferably not less than 5000 hours) from a dialkyl carbonate and an aromatic dihydroxy compound. When producing the aromatic polycarbonate from the dialkyl carbonate and the aromatic dihydroxy compound, the above object can be attained by carrying out a process according to the present invention which comprises the steps of: (I) producing a diphenyl carbonate using two reactive distillation columns each having a specified structure; (II) obtaining a high-purity diphenyl carbonate from the diphenyl carbonate using a high boiling point material separating column A and a diphenyl carbonate purifying column B each having a specified structure; (III) subsequent producing an aromatic polycarbonate using a guide-contacting downflow type polymerization apparatus having a specified structure from a molten prepolymer obtained from the aromatic dihydroxy compound and the high-purity diphenyl carbonate; and (IV) recycling by-produced phenol into step (I). | 08-20-2009 |
| 20090215977 | PROCESS FOR THE PREPARATION OF POLYCARBONATE - The invention relates to a combined process for the preparation of polycarbonate by the phase boundary process and downstream electrolysis of sodium chloride-containing process wastewater. | 08-27-2009 |
| 20090240021 | PROCESS FOR THE PREPARATION OF POLYCARBONATES AND DIARYL CARBONATE - The present invention relates to a process for the continuous preparation of polycarbonates or diaryl carbonates by the method of the phase boundary process, in which both the mixing of the organic and aqueous phase and the upstream oligomerization step or aryl chloroformate and/or diaryl carbonate preparation step are effected in a special pump. | 09-24-2009 |
| 20090286952 | METHOD OF FORMING POLYCARBONATE - A method of forming polycarbonate includes the steps of introducing a plurality of reaction components to a reactor operating under melt polymerization conditions and removing ester-substituted phenol from the reactor. The plurality of reaction components include a dihydroxy compound, an ester-substituted diaryl carbonate, and a melt transesterification catalyst. The reaction components are introduced in a plurality of reaction component streams. A first reaction component streams includes a melt transesterification catalyst dissolved or suspended in a liquid carrier containing an ester-substituted phenol. The composition of the first reaction component stream is selected such that ester-substituted phenol is not generated as a reaction product in the first reaction component stream. | 11-19-2009 |
| 20090326183 | BRANCHED POLYCARBONATE-POLYSILOXANE COPOLYMERS AND PROCESSES FOR PRODUCING THE SAME - Methods for making a branched polycarbonate-polysiloxane copolymer are provided. An interfacial mixture comprising water, an organic solvent, a polyhydric branching agent, a non-siloxane-containing dihydroxy compound, an endcapping agent, a phase transfer catalyst, and a base is formed. The base and the branching agent are dissolved in the mixture before the non-siloxane-containing dihydroxy compound is added and the interfacial mixture has a basic pH. A first carbonate precursor is added to the interfacial mixture while maintaining the pH at from about 3 to about 9 to form a branched polycarbonate mixture. Next, the pH is increased to from about 8 to about 13 and a siloxane oligomer is added to the branched polycarbonate mixture. The branched polycarbonate mixture is then reacted to form the branched polycarbonate-polysiloxane copolymer. The resulting branched copolymer contains 20 ppm or less of residual chloride, is transparent, has improved flow properties, and has good flame retardance at thin wall thicknesses. | 12-31-2009 |
| 20100222542 | Polycarbonate resin, and method of use of, poly (2-octadecyl-butanedioic acid) and the salts and esters thereof - A polymer comprising a polymer backbone. The polymer backbone has a plurality of carbon atoms. There are two lipophobic carboxylate groups or carboxylic acid groups per repeating unit being coupled to separate carbon atoms of the backbone. | 09-02-2010 |
| 20100273973 | CONTINUOUS PRODUCTION METHOD AND PRODUCTION APPARATUS OF AROMATIC POLYCARBONATE - The object of the present invention is to provide a method of producing plural kinds of aromatic polycarbonates by a melt process without changeover loss and quality deterioration. The present invention relates to a production method of an aromatic polycarbonate, comprising supplying a molten mixture of raw materials of an aromatic dihydroxy compound and/or a carbonic diester prepared in the absence of an ester exchange catalyst to polycondensation steps of two lines each equipped with three vertical reactors connected in series and one horizontal reactor, and at the same time, continuously conducting polycondensation reaction in the presence of an ester exchange catalyst. | 10-28-2010 |
| 20110009592 | PROCESS FOR THE PREPARATION OF POLYCARBONATE - A combined process for the preparation of polycarbonate from bisphenols and diaryl carbonates, the monophenol liberated being reacted again for the preparation of the diaryl carbonate and the alkali metal halide forming in the preparation of the diaryl carbonate being converted by electrochemical oxidation, optionally over a gas diffusion electrode, into chlorine and alkali hydroxide solution, the chlorine being recycled into the preparation of the phosgene and the alkali hydroxide solution being recycled into the preparation of the diaryl carbonate. | 01-13-2011 |
| 20110077377 | Method of Making Isosorbide Polycarbonate - A polycarbonate is provided that contains repeat units derived from isosorbide and a residue derived from an activated diaryl carbonate. The polycarbonate has | 03-31-2011 |
| 20110184144 | PROCESS AND APPARATUS FOR THE PREPARATION OF POLYCARBONATE - The invention relates to a process for the pretreatment of material surfaces in order to minimize the interaction between polycarbonate and metal and, in the processing and synthesis of polycarbonate, to obtain a high-quality polymer which in particular does not become discoloured and is free of insoluble constituents. | 07-28-2011 |
| 20110245451 | METHOD FOR PREPARING FINE SPHERICAL POLYCARBONATE POWDERS AND METHOD FOR PREPARING HIGH MOLECULAR WEIGHT POLYCARBONATE RESIN USING SAME - Provided are a method for preparing fine round powdery polycarbonate and a method for preparing a high molecular weight polycarbonate resin using the same. | 10-06-2011 |
| 20120065354 | SUBSTRATE MATERIAL FOR HIGH SPEED OPTICAL DISCS - This invention relates to the use of polycarbonate for the production of an optical recording medium in which secure high speed operation, a transcriptability of the pit/groove structure of >85% and sufficient disc flatness can be achieved. | 03-15-2012 |
| 20120065355 | Polymerization of High Viscosity Materials - The present invention relates to a new polymerization process which is suitable for polymerizing high molecular weight products of high viscosity such as polycarbonates and polystyrenes in reasonable time. The present invention achieves the above-identified object by means of a polymerization process, wherein at least in the final stages of the polymerization reaction, two different types of mechanical mixing means are employed as alternatives, designated first and second mixing means. The first mixing means do generate new surfaces in the material to be treated by means of mechanical mixing and by means of gravity driven mixing, while the second mixing means do generate new surfaces in the material to be treated not by means of mechanical mixing and only by means of gravity driven mixing. | 03-15-2012 |
| 20120101247 | PROCESS FOR PREPARING DIARYL CARBONATES FROM DIALKYL CARBONATES - The present invention relates to a process for continuously preparing diaryl carbonates from dialkyl carbonates and at least one monohydroxyl compound in the presence of catalysts, and to the use thereof for preparation of polycarbonates. The alkylene glycol obtained in the preparation of the dialkyl carbonate used is recycled by oxidative carbonylation with carbon monoxide in the presence of a catalyst to give the cyclic alkylene carbonate which is in turn converted to the dialkyl carbonate. More particularly, the process utilizes the alkylene glycol obtained for the diphenyl carbonate preparation process (DPC process). | 04-26-2012 |
| 20120108782 | DEVICE AND METHOD FOR DEGASSING SOLVENT-CONTAINING POLYCARBONATE SOLUTIONS - The invention relates to an apparatus and a process for devolatilizing solvent-containing polycarbonate solutions. By employing the inventive apparatus, polycarbonates with low residual values of volatile constituents are produced from solvent-containing polymer melts, which improved optical properties, especially yellowness index, with the aid of an apparatus combination of a heatable tubular devolatilizer and a vented extruder. | 05-03-2012 |
| 20120123084 | DEVICE AND METHOD FOR DEGASSING SOLVENT-CONTAINING POLYCARBONATE SOLUTIONS - The invention relates to an apparatus and a process for devolatilizing solvent-containing polycarbonate solutions. By employing the inventive apparatus, polycarbonates with low residual values of volatile constituents are produced from solvent-containing polymer melts, which improved optical properties, especially yellowness index, with the aid of an apparatus combination of a flash devolatilizer and a vented extruder. | 05-17-2012 |
| 20120157653 | ULTRA-HIGH PURITY POLYCARBONATES HAVING GOOD INHERENT COLOR AND THERMAL RESISTANCE AND A DEVICE AND A METHOD FOR PRODUCING THE SAME - The invention relates to polycarbonates with extremely low residual levels of volatile constituents and thermal degradation products, and also improved optical properties, especially Yellowness Index (YI) and good thermal stability, from solvent-containing polymer melts. The invention further relates to an apparatus and a process for preparing these polycarbonates with the aid of a devolatilizing extruder with at least three devolatilizing zones, and zones for introducing entraining agent into dispersion are present upstream of at least three devolatilizing zones. | 06-21-2012 |
| 20120245319 | PROCESS FOR PREPARING DIARYL CARBONATES - The invention relates to a process for preparing a diaryl carbonate from a dialkyl carbonate and an aryl alcohol using a series of reactive distillation columns. | 09-27-2012 |
| 20120296063 | PROCESS FOR PREPARING DIARYL OXALATE - Disclosed is a process for preparing a diaryl oxalate which comprises the step of transesterifying a dialkyl oxalate or/and an alkylaryl oxalate with an aryl alcohol in the presence of a tetra(aryloxy)titanium as a catalyst, wherein the tetra(aryloxy)titanium is fed into a reaction system of the transesterification as an aryl alcohol solution of the tetra(aryloxy)titanium which is prepared by reacting a tetraalkoxy titanium and an excess amount of the aryl alcohol and removing a by-producing alkyl alcohol. | 11-22-2012 |
| 20120329977 | POLYCARBONATE RECOVERY FROM POLYMER BLENDS BY LIQUID CHROMATOGRAPHY - Polycarbonates are recovered from polymer blends by liquid chromatography. Polycarbonate recovered by the process can be reused in new applications. The invention can be extended to recycling of other polymers present in the blends. | 12-27-2012 |
| 20130066037 | METHOD FOR PRODUCING BISCHLOROFORMATE COMPOUND, POLYCARBONATE OLIGOMER HAVING SMALL NUMBER OF MONOMERS AND SOLUTION CONTAINING BISCHLOROFORMATE COMPOUND - A dihydric phenol compound represented by the following formula (2), a phosgene compound, and an aliphatic tertiary amine are mixed together using a hydrophobic organic solvent to produce bischloroformate that is represented by the following formula (1) and has an average number of repeating units (n) of 1.99 or less. | 03-14-2013 |
| 20140179892 | METHOD FOR ALCOHOLYSIS OF POLYCARBONATE COMPOSITIONS CONTAINING FLAME RETARDANT OR ACRYLONITRILE-BUTADIENE-STYRENE - The disclosure provides a method for alcoholysis of a polycarbonate-containing composition comprising a polycarbonate and a component comprising a phosphorus-containing flame retardant, an acrylonitrile-butadiene-styrene, or a combination of the phosphorus-containing flame retardant and acrylonitrile-butadiene-styrene. The method comprises contacting the composition with a solvent that forms a solution or a filterable suspension of the component but not the polycarbonate; separating the solution or the filterable suspension from the polycarbonate; and heating the polycarbonate in the presence of an alcohol and a catalyst at a temperature from 70° C. to 200° C., and a pressure from 5 mbar to 40 bar for a time sufficient to depolymerize the polycarbonate and produce a dihydroxy aromatic compound and a dialkyl carbonate. | 06-26-2014 |
| 20140275466 | PRODUCTION OF A POLYCARBONATE WITH LIMITED METAL RESIDUALS - A method for producing a polycarbonate comprising: reacting a diaryl carbonate with a dihydroxy compound to form a polycarbonate, wherein the polycarbonate comprises: less than or equal to 1000 ppb of molybdenum; less than or equal to 33 ppb of vanadium; less than or equal to 33 ppb of chromium; less than or equal to 375 ppb of niobium; less than or equal to 33 ppb of nickel; less than or equal to 10 ppb of zirconium; and less or equal to 10 ppb iron. | 09-18-2014 |
| 20140378643 | PROCESS FOR THE MANUFACTURE OF POLYCARBONATE COMPOSITIONS - A continuous process for the manufacture of a polycarbonate comprises: combining an aromatic dihydroxy compound stream and a diaryl carbonate stream to form a mixture; controlling a weight or molar ratio of the diaryl carbonate to the aromatic dihydroxy compound by: measuring a sound velocity, Vs, in the mixture at an operating temperature of the controlling step; and determining the weight or molar ratio of the diaryl carbonate to the aromatic dihydroxy compound in the mixture; and adjusting a flow rate of at least one of the aromatic dihydroxy compound stream and the diaryl carbonate stream, if needed, to achieve a desired weight or molar ratio of the diaryl carbonate to the aromatic dihydroxy compound; and polymerizing the aromatic dihydroxy compound and the diaryl carbonate in the presence of a catalyst to produce the polycarbonate. | 12-25-2014 |
| 20150018510 | POLYCARBONATE RESIN, POLYCARBONATE RESIN COMPOSITION AND MOLDED ARTICLE THEREOF - The present invention relates to a polycarbonate resin having, in the molecule, at least a structural unit represented by the following formula (1), wherein the terminal hydroxyl group concentration of the polycarbonate resin is 300 ppm or less: | 01-15-2015 |
| 20150087798 | METHOD FOR CONTINUOUS PRODUCTION OF POLYCARBONATE - To provide a method for continuous production of a polycarbonate with safety, wherein (1) the contents of impurities in phosgene, which adversely affect a product, such as carbon tetrachloride, chloroform, etc., are decreased, and in its turn, the contents of the impurities in a polycarbonate are decreased; (2) by using a formed phosgene gas directly for an oligomer reaction step without going through a purification step, noxious phosgene is not substantially held; and preferably, (3) an apparatus is automatically stopped even at abnormal time, and noxious phosgene is detoxicated without being leaked outside the system. | 03-26-2015 |
| 20160152768 | POLYCARBONATE RESIN COMPOSITION, AND FLUORESCENCE DETECTION/ANALYSIS SUBSTRATE PRODUCED USING POLYCARBONATE RESIN COMPOSITION | 06-02-2016 |
| 20160168063 | METHOD FOR DIRECT AMMONOLYSIS OF POLYCARBONATE-CONTAINING MATERIALS AND PRODUCTS | 06-16-2016 |
| 20160177029 | THERMAL ENHANCEMENT OF THE PURIFICATION PROCESS FOR INTERFACIAL POLYCARBONATE AND COPOLYMER POLYCARBONATES | 06-23-2016 |
| 20170233328 | METHOD OF MELT POLYMERIZING POLYCARBONATE AND THE POLYCARBONATE MADE THEREFROM | 08-17-2017 |
| 20190143582 | COPOLYCARBONATE AS A SUPPORTING MATERIAL IN 3-D PRINTING | 05-16-2019 |
| 20220135795 | POLYCARBONATE RESIN COMPOSITION OR COPOLYMER, AND OPTICAL FILM - A polycarbonate resin composition or a copolymer, comprising, as main repeating units, a carbonate unit (a-1) having a fluorene ring in a side chain, a carbonate unit (a-2) represented by the following formula (a-2): | 05-05-2022 |
| 528198000 | Polymerizing in the presence of a specified material other than a reactant and other than Group IA or Group IIA material as sole metal atom | 9 |
| 20120296064 | METHODS AND SYSTEMS FOR THE CONTINUOUS ADDITION OF BRANCHING AGENTS INTO MELT POLYCARBONATE POLYMERIZATION PROCESSES - This disclosure relates generally to methods for the manufacture of melt polymerized branched polycarbonates. The methods disclosure herein introduce branching agent into the melt process as a dissolved component in a solution comprised of a solvent and dissolved branching agent. Also disclosed are systems and apparatuses for performing the disclosed methods. | 11-22-2012 |
| 20160200864 | METHOD FOR PREPARING BRANCHED POLYCARBONATE WITH CONTINUOUS TWO-PHASE INTERFACE PHOSGENE METHOD | 07-14-2016 |
| 528199000 | Material is a nitrogen-containing compound | 5 |
| 20090043071 | SULFONATED TELECHELIC POLYCARBONATES - A sulfonated telechelic polycarbonate is described which is produced by melt synthesis. A dihydroxy compound is reacted with a sulfobenzoic acid salt, then with an activated carbonate. The method results in a sulfonated telechelic polycarbonate which has a high percentage of sulfonated end groups, is soluble, and is transparent. | 02-12-2009 |
| 20090259014 | PROCESS FOR PREPARING POLYESTERCARBONATES - Processes for preparing polyestercarbonates are disclosed. The processes allow for the consistent incorporation of adipic acid into a polymer generated from a dihydroxy compound, such as bisphenol-A, at levels greater than 99%. The polyestercarbonates so produced, as well as articles formed from the polyestercarbonates, are also disclosed herein. | 10-15-2009 |
| 20100048854 | POLYCARBONATE RESIN AND MANUFACTURING PROCESS THEREOF - A polycarbonate resin which shows a high content of biogenic matter and has excellent heat resistance, heat stability and moldability, and a manufacturing process thereof. The polycarbonate resin contains a recurring unit represent by the following formula (1) as the major constituent, and has (i) a specific viscosity of a solution prepared by dissolving 0.7 g of the resin in 100 ml of methylene chloride at 20° C. of 0.20 to 0.45, (ii) a glass transition temperature (Tg) of 150 to 200° C., and (iii) a 5% weight loss temperature (Td) of 330 to 400° C. | 02-25-2010 |
| 20120226011 | METHOD FOR PRODUCING POLYCARBONATE - The present invention relates to a method for producing a polycarbonate, containing melt-polycondensing a diol component containing a compound represented by the following formula (1) with a fluorine-containing carbonate: | 09-06-2012 |
| 20160032046 | POLYCARBONATE MANUFACTURING METHOD AND POLYCARBONATE - The present invention relates to a method of producing polycarbonate containing following step (a) and step (b), (a) a step of reacting a specific fluorine-containing carbonate (Compound (1), etc.) and an aromatic dihydroxy compound in the presence of a condensation catalyst, to obtain a prepolymer, and (b) a step of heating the prepolymer at a temperature which is lower than a melting temperature of the prepolymer and performing solid phase polymerization on the prepolymer while a fluorine-containing alcohol that is produced as a by-product is discharged out of a system, to obtain a polycarbonate. | 02-04-2016 |
| 528200000 | Material contains a metal atom | 2 |
| 20100324256 | PROCESS FOR PRODUCING POLYCARBONATE - A process is described for producing polycarbonate and utilizing at least some of the process waste water by concentrating the sodium chloride-containing waste water phases for the electrolysis using osmotic membrane distillation, if appropriate with simultaneous dilution of the sodium hydroxide solution obtained from the electrolysis for the polycarbonate production process. | 12-23-2010 |
| 20140073757 | POLYCARBONATE RESIN AND TRANSPARENT FILM COMPRISING THE SAME - The polycarbonate resin of the present invention comprises a structural unit derived from a dihydroxy compound represented by a specific formula (1), a structural unit derived from a dihydroxy compound represented by a specific formula (2), and a structural unit derived from a dihydroxy compound represented by any one of specific formulae (3) to (6), wherein the content of structural units derived from dihydroxy compounds represented by the specific formulae (3) to (6) is within a specific range based on the total of structural units derived from dihydroxy compounds in the polycarbonate resin. | 03-13-2014 |
| 528201000 | Fused- or bridged-ring-containing reactant other than solely as a polycarboxylic acid anhydride group | 13 |
| 20100048855 | Optical Lens - Disclosed is an optical lens which can be produced by injection molding on an industrial scale and which has a high refractive index, a low Abbe's number, a low birefringence index, a high transparency and a high glass transition temperature. The optical lens can be produced by injection molding of a polycarbonate resin (preferably having a reduced viscosity of 0.2 dl/g or higher and a glass transition temperature of 120 to 160° C.), wherein the polycarbonate resin is produced by reacting a diol component comprising 99 to 51 mol % of 9,9-bis(4-(2-hydroxyethoxy)phenyl)fluorene and 1 to 49 mol % of bisphenol A with a carbonate diester. It becomes possible to produce an optical lens preferably having a refractive index of 1.60 to 1.65, an Abbe's number of 30 or smaller, a birefringence index of 300 nm or lower and an all light transmittance of 85.0% or higher. | 02-25-2010 |
| 20100286358 | COPOLYCARRBONATE-POLYESTERS, METHODS OF MANUFACTURE, AND USES THEREOF - A copolycarbonate-polyester, comprising units of formula | 11-11-2010 |
| 20110112271 | POLYCARBONATE RESIN HAVING ULTRAVIOLET ABSORBING CAPACITY, RESIN COMPOSITION AND OPTICAL MATERIAL - A polycarbonate resin having at least one terminal group which is represented by formula (1), and a resin composition and an optical material comprising the polycarbonate resin are disclosed. In the formula, R | 05-12-2011 |
| 20110160422 | ISOSORBIDE-BASED POLYCARBONATES, METHOD OF MAKING, AND ARTICLES FORMED THEREFROM - Disclosed herein is a polycarbonate polymer comprising: an isosorbide unit, a polysiloxane unit; and an aliphatic unit different from the isosorbide unit, wherein the isosorbide unit, polysiloxane unit, and aliphatic unit are each carbonate, or a combination of carbonate and ester units and the aliphatic unit is derived from an aliphatic oligomer having a molecular weight of 900 to 4000. | 06-30-2011 |
| 20110288261 | OPTICAL FILM - The object of this invention is to provide an optical film formed of a copolycarbonate having a desired chromatic dispersion and low photoelasticity and having excellent melt processability. | 11-24-2011 |
| 20120016100 | COPOLYCARBONATE AND PROCESS FOR PRODUCING THE SAME - The object of this invention is to provide a copolycarbonate that is excellent in heat resistance, thermal stability and moldability and that uses a renewable resource as a raw material. This invention is a copolycarbonate including 50 to 99 mol % of a carbonate constituent unit (1) of the following formula and 50 to 1 mol % of a carbonate constituent unit (2) derived from an aliphatic diol having a boiling point of 180° C. or higher under reduced pressure of 4×10 | 01-19-2012 |
| 20120309926 | METHODS FOR PRODUCING AND PURIFYING 2-ARYL-3,3-BIS(4-HYDROXYARYL)PHTHALIMIDINE COMPOUNDS, THE PURIFIED MONOMERS, AND POLYMERS DERIVED THEREFROM - Disclosed is a method for producing a purified 2-aryl-3,3-bis(4-hydroxyaryl)phthalimidine of formula (I) | 12-06-2012 |
| 20130005939 | OPTICAL FILM - An optical film comprising a copolycarbonate composed of 25 to 90 mol % of unit (A) of the following formula, | 01-03-2013 |
| 20130253162 | POLYCARBONATE RESIN AND MOLDED ARTICLE THEREOF - A resin which has high heat resistance, high surface hardness and excellent moldability and is obtained from a biomass resource and a molded article thereof. | 09-26-2013 |
| 20140128567 | COPOLYCARBONATE AND TRANSPARENT MOLDED ARTICLE OBTAINED THEREFROM - A copolycarbonate which is derived from a renewable resource and excellent in heat resistance, flowability and transparency and prevented from undergoing a dimensional change by water absorption and coloring during molding as well as a transparent molded article obtained therefrom. | 05-08-2014 |
| 20140350208 | POLYCARBONATE RESIN - A polycarbonate resin which is excellent in heat resistance, boiling water resistance and surface hardness and has a low water absorption coefficient. | 11-27-2014 |
| 20160168322 | LOW SHEAR PROCESS FOR POLYCARBONATE PURIFICATION | 06-16-2016 |
| 20160168323 | PROCESS FOR THE PURIFICATION OF POLYCARBONATE | 06-16-2016 |
| 528202000 | Reactant contains a halogen atom other than solely as halogen bonded to a carbonyl group | 1 |
| 20160376401 | POLYMERIC BIOMATERIALS DERIVED FROM PHENOLIC MONOMERS AND THEIR MEDICAL USES - The present invention provides new classes of phenol compounds, including those derived from tyrosol and analogues, useful as monomers for preparation of biocompatible polymers, and biocompatible polymers prepared from these monomeric phenol compounds, including novel biodegradable and/or bioresorbable polymers. These biocompatible polymers or polymer compositions with enhanced bioresorbabilty and processibility are useful in a variety of medical applications, such as in medical devices and controlled-release therapeutic formulations. The invention also provides methods for preparing these monomeric phenol compounds and biocompatible polymers. | 12-29-2016 |
| 528203000 | Reactant contains a nitrogen atom | 1 |
| 20120197001 | BIORESORBABLE POLYMERS SYNTHESIZED FROM MONOMER ANALOGS OF NATURAL METABOLITES - This invention discloses biocompatible polymers prepared from monomers (IV), and (IVa), or derivatives thereof, for which the variables are described in the claims and specification. These polymers may be bioresorbable and thus useful for manufacture of medical devices. Therefore, methods for preparing these polymers and medical devices prepared therefrom are also encompassed by this disclosure. | 08-02-2012 |
| 528204000 | Two or more phenolic reactants | 6 |
| 20120253002 | BRANCHED POLYCARBONATE RESIN AND PROCESS FOR PRODUCING THE SAME - The invention seeks to provide a branched polycarbonate resin having a high branching agent content, which has a good melt tension, virtually causes no drawdown and permits stable molding when it is molded in extrusion molding, blow molding, injection molding, vacuum molding, etc., and a process for producing the same. | 10-04-2012 |
| 20130085252 | POLYCARBONATE AND METHOD OF PREPARING THE SAME - Polycarbonate includes repeat units represented by Formula 1, Formula 2 and Formula 3, respectively: | 04-04-2013 |
| 20130211035 | PROCESS FOR PRODUCING POLYCONDENSATION POLYMER, AND POLYMERIZER - A method for producing a condensation polymerization reaction polymer, comprising a guide polymerization step in which a molten prepolymer is supplied to the top edge of a wire guide to obtain the condensation polymerization reaction polymer, the wire guide comprising a vertical wire group consisting of a plurality of vertical wires extending in the vertical direction, which are mutually spaced in alignment at an arrangement pitch L1 (mm). In the guide polymerization step, the molten prepolymer aggregates so that a molten prepolymer mass is formed on the vertical wire, and a molten prepolymer mass is formed wherein, the width of the molten prepolymer mass measured in an alignment direction of the vertical wires at a position 200 mm below the top edge being represented as L2 (mm), the width L2 of at least a portion of the molten prepolymer mass satisfies the inequality (1). | 08-15-2013 |
| 20140187738 | Copolymerized Polycarbonate Resin, Method for Preparing the Same, and Article Comprising the Same - A copolymerized polycarbonate resin includes a repeat unit represented by Formula 1; a repeat unit represented by Formula 2; and a repeat unit represented by Formula 3, wherein the repeat unit represented by Formula 1 is different than the repeat unit represented by Formula 3, and wherein Formula 1, 2, and 3 are the same as defined in the specification. The copolymerized polycarbonate resin can have excellent properties in terms of chemical resistance, thermal resistance, and/or external appearance. | 07-03-2014 |
| 20150094444 | Polycarbonate, Production Method for Same and Optical Film Comprising Same - A polycarbonate of the present invention includes repeating units represented by, Formula 1, Formula 2 and Formula 3, respectively, and thus, may have excellent scratch resistance, chemical resistance and impact property. | 04-02-2015 |
| 20150376331 | POLYMERS, CO-POLYMERS, AND MONOMERS USING CO2 AS A REAGENT - Polymers, co-polymers, and monomers using CO | 12-31-2015 |
