| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 528354000 | From compound having -C-C(=O)-O-C- group as part of a heterocyclic ring, e.g., lactone, etc. | 89 |
| 20080275210 | BIOCOMPATIBLE POLYMERIC CONTRAST AGENTS AND RADIOPAQUE MATERIALS FOR MEDICAL DEVICES - In accordance with the present invention, a high intensity radiopaque contrast agent is disclosed. The agent may be coated on or incorporated within bulk materials, which may then be subsequently utilized to fabricate a radiopaque medical device. Primary effects through chemistry include higher radiopaque concentrations per unit weight of the radiopaque element or agent. Secondary effects include selective placement of the radiopaque elements which may further enhance the radiopacity of the device with reduced requirements of the radiopaque agent. Such a radiopaque contrast agent may be produced in various forms such as a dendrimer and/or incorporated as the end groups of polymeric chain. In addition one can incorporate biological and/or pharmaceutical agents in combination with the present invention. | 11-06-2008 |
| 20080319160 | Polycyclic Ester Containing Cyano Group and Lactone Skeleton - Disclosed is a polycyclic ester containing a cyano group and a lactone skeleton, represented by following Formula (1): | 12-25-2008 |
| 20090030174 | One-pot, one-step in situ living polymerization from silicate anchored multifunctional initiator - Silicate anchored multifunctional initiator has moiety initiating ring opening living polymerization of lactone or ethylene oxide or cyclic siloxane monomer and other moiety for initiating living free radical polymerization of ethylenically unsaturated monomer. The monomers are reacted with the initiator in a one-pot, one-step reaction to cause living polymerization of both monomers and exfoliation of silicate layers to provide dispersed block copolymer silicate nanocomposite, with the junction of the two blocks being anchored to silicate layer and each block dangling therefrom. | 01-29-2009 |
| 20090048423 | Phospholipid Copolymers - The present disclosure provides copolymers including a first monomer including at least one phospholipid possessing at least one hydroxyl group and a second monomer including a cyclic monomer. Compositions, medical devices, and coatings including such copolymers are also provided. | 02-19-2009 |
| 20090054619 | Functionalization of polyglycolides by "click" chemistry - Poly(glycolide) polymers are disclosed. The polymers generally include a polymerized alkynyl-substituted glycolide having a polymer backbone with one or more alkynyl groups appended thereto. The alkynyl groups provide reactive sites for further functionalization of the polymer, for example by reaction with azide derivatives (e.g., azide-substituted organic compounds). Alkynyl and azide groups react via the “click” chemistry mechanism to form functional groups covalently bonded to the polymer via a triazole link. The polymers are biodegradable and can be used to deliver drugs or other therapeutic substances (e.g., large biomolecules such as single strand RNA) at targeted locations in a patient's body and/or at controlled release rates. | 02-26-2009 |
| 20090171064 | BIO-DEGRADABLE/ ABSORBABLE POLYMER HAVING REDUCED METAL CATALYST CONTENT, AND PROCESS FOR PRODUCTION THEREOF - The present invention provides a safe biodegradable and bioabsorbable polymer having an extremely low metal catalyst content, while retaining the properties desired for a medical implant or the like; and a process for producing the same. The present invention further provides a method for reducing the content of a metal catalyst in a biodegradable and absorbable polymer that can be applied on an industrial scale. A method for producing a biodegradable and bioabsorbable polymer having a metal catalyst content of less than 1 ppm in terms of a metal comprising the steps of (1) copolymerizing lactide and ε-caprolactone at a molar ratio ranging from 40/60 to 60/40 in the presence of the metal catalyst to produce a copolymer; and (2) washing the copolymer with a mixed solvent comprising acetic acid and isopropanol at a volume ratio ranging from 25/75 to 45/55 at less than 40° C., and drying the copolymer. 13. A method for producing a biodegradable and bioabsorbable polymer having a metal catalyst content of less than 1 ppm in terms of a metal comprising the steps of (1) copolymerizing lactide and ε-caprolactone at a molar ratio ranging from 65/35 to 85/15 in the presence of the metal catalyst to produce a copolymer; and (2) washing the copolymer with a mixed solvent comprising acetic acid and isopropanol at a volume ratio ranging from 45/55 to 55/45 at less than 40° C., and drying the copolymer. | 07-02-2009 |
| 20090209726 | ACRYLIC STAR POLYMER - An object of the present invention is to provide an acrylic acid-based star polymer which has a controlled structure with a narrow molecular weight distribution and acid decomposability. The star polymer contains, as a core portion, a polymer chain having a repeating unit derived from a polyacrylate which has at least two partial structures represented by formula (I): | 08-20-2009 |
| 20090247727 | Method of Purifying Dianhydrides, the Dianhydrides Formed Thereby, and Polyetherimides Formed Therefrom - A method for purifying an oxydiphthalic anhydride comprises diluting a first mixture comprising an oxydiphthalic anhydride, a solvent, a catalyst, and an inorganic salt with a solvent, to provide a second mixture having a solids content of 10 to 30 percent based on total weight of the second mixture; filtering and washing the solids of the second mixture at a temperature below the crystallization point temperature of the oxydiphthalic anhydride to provide a third mixture; hydrolyzing the third mixture by adding water and a water-soluble acid to form a fourth mixture; heating the fourth mixture; then cooling to provide a solid-liquid mixture, optionally decanting a portion of the liquid, rediluting the remaining solid-liquid mixture, then filtering to provide a solid component; washing the solid component with water to provide a fifth mixture of oxydiphthalic tetraacid and water; ring closing the oxydiphthalic tetraacid to provide oxydiphthalic anhydride, and filtering the oxydiphthalic anhydride. | 10-01-2009 |
| 20100056751 | PROCESS OF PRODUCING POLYLACTIC ACID - It is an object of the present invention to produce a polylactic acid having a high molecular weight such as a weight average molecular weight (Mw) of more than 100,000 from which only a stereocomplex crystal is grown even by repeating melting and crystallization. The present invention is a process of producing a polylactic acid, including the steps of:
| 03-04-2010 |
| 20100069602 | MICROENCAPSULATION PROCESS WITH SOLVENT AND SALT - The present disclosure relates to processes for preparing microparticles using an emulsion process where both a solvent and a salt are used in the continuous phase of the emulsion. The present disclosure also relates to micropartices having an angle of repose of ≦35, as measured using a Hele-Shaw cell. | 03-18-2010 |
| 20100081785 | Cationically polymerizable composition and method for controlling cationic polymerization - Disclosed is a cationically polymerizable composition which shows improved storage stability and whose polymerization initiation temperature or curing temperature is controlled. In the case where the composition is thermosetting, it yields a cured product of three-dimensional structure excellent in mechanical properties, electrical properties, adhesive properties, heat resistance, moisture resistance, chemical resistance, and the like. The cationically polymerizable composition comprises a cationically polymerizable compound selected from vinyl compounds, lactones, cyclic ethers, and the like, a heteropolyacid selected from phosphotungstic acid, phosphomolybdic acid, silicotungstic acid, silicomolybdic acid, and the like as a cationic polymerization initiator, and a stabilizer selected from heteropolyacid salts as an inhibitor of cationic polymerization. | 04-01-2010 |
| 20100121024 | METHOD FOR PRODUCING A COPOLYMER OF AT LEAST ONE CYCLIC MONOMER - The present invention relates to a process for the preparation of a copolymer of at least one cyclic monomer chosen from a lactone, a lactam, a lactide and a glycolide, comprising the stage consisting in reacting said cyclic monomer with a polymeric initiator in the presence of a compound carrying a sulfonic acid functional group. | 05-13-2010 |
| 20100152415 | POLYLACTIC ACID STEREOCOMPLEX COMPOSITIONS AND METHODS FOR MAKING AND USING SAME - Thermoformed PLA stereocomplex parts are made using a PLA stereocomplex composition having a highest crystallization melting temperature from 200 to 215° C. The stereocomplex composition preferably has less than 5 J/g of lower melting (160 to 190° C.) crystallites. The stereocomplex can be pre-annealed in various ways to reduce thermoforming cycle times. The stereocomplex forms parts with low haze and good thermal resistance, at reasonable cycle times. | 06-17-2010 |
| 20100160597 | MANUFACTURING APPARATUS OF POLYLACTIC ACID AND MANUFACTURING METHOD OF POLYLACTIC ACID - A manufacturing apparatus of polylactic acid having at least an inlet and an outlet of a substance to be reacted and an exhaust port provided in a horizontal reaction vessel not having continuous rotating shafts in a direction of center line of a rotating shaft of a stirring blade provided in the reaction vessel and a manufacture method. By removing low molecular weight substance in the polylactic acid, high-quality polylactic acid can be stably manufactured. | 06-24-2010 |
| 20100197884 | METHOD FOR MAKING COPOLYMERS OF LACTIDE AND A 1:4-3:6 DIANHYDROHEXITOL - Polyester-carbonate copolymers are prepared by copolymerizing lactide with a 1:4-3:6 dianhydrohexitol in the presence of a carbonate precursor and a polymerization catalyst. The copolymers have an elevated glass transition temperature, relative to polylactide resins. | 08-05-2010 |
| 20100234557 | Process For Producing Aliphatic Polyester - A process for producing an aliphatic polyester through ring-opening polymerization of a cyclic ester, wherein a partial polymer in a molten state is continuously introduced into a twin-screw stirring device to continuously obtain a partial polymer in a solid pulverized state, the partial polymer is subjected to solid-phase polymerization, and the resultant polymer is melt-kneaded together with a thermal stabilizer to be formed into pellets. As a result, an aliphatic polyester of a high molecular weight and with little discoloration is produced efficiently. | 09-16-2010 |
| 20100234558 | POLYLACTIC ACID RESIN, TEXTILE PRODUCTS OBTAINED THEREFROM, AND PROCESSES FOR PRODUCING TEXTILE PRODUCTS - A polylactic acid monofilament includes a linear polylactic acid with a relative viscosity ηrel of in the range of 2.7 to 4.5, prepared from lactic acid monomers wherein at least 95 mol % of the lactic acid is an L-isomer, and wherein the resin contains 0 to 30 ppm of Sn and 0 to 0.5% by weight of residual monomer. | 09-16-2010 |
| 20100280218 | POLYMERIC MATERIALS FROM RENEWABLE RESOURCES - Disclosed are polymers that include components produced from renewable resources and methods for forming the disclosed polymers. The polymers include the reactive intermediates that in turn include components derived from, for example, lactide or sorbitol. The reactive intermediates can be polymerized with each other as well as with more traditional resins to form polymeric networks. In one embodiment, the disclosed intermediates can be utilized in forming vinyl ester resins. In particular, the vinyl ester-styrene resins and thermoset networks formed therefrom including the disclosed intermediates can include lower styrene content than previously known vinyl ester-styrene resins, and can exhibit physical characteristics such as glass transition temperature and flexural strength properties equal to previously known vinyl ester-styrene resins that include a higher styrene content. | 11-04-2010 |
| 20100305300 | Method of Ring-Opening Polymerization, and Related Compositions and Articles - Methods to form a polymer by ring-opening polymerization include reacting, a mixture comprising a monomer, an accelerator, an initiator, and a catalyst comprising a 1,1,1,3,3,3-hexafluoropropan-2-ol-2-yl group to form the polymer. Also disclosed are polymers including a residual amount of the catalyst in an amount greater than 0 weight percent. | 12-02-2010 |
| 20110098438 | Production Process of Alpha-Hydroxy Acids - An object of the present invention is to provide a production process of an α-hydroxy acid having a sufficient quality as a polymer raw material, which process does not produce a large amount of waste as a byproduct and is economical. | 04-28-2011 |
| 20110105716 | PROCESS AND APPARATUS FOR PREPARING BIOPOLYMERS - In a method of treating viscous products, particularly for the implementation of polymerization operations, more particularly for the homopolymerization or copolymerization of bipolymers, where monomer(s) and/or catalysts and/or initiators are fed to a backmixed mixing compound ( | 05-05-2011 |
| 20110144301 | Method and Device for Cleaning an Absorptive Polyester - In a method for cleaning an absorptive polyester, the polymer is dissolved in a first solvent ( | 06-16-2011 |
| 20110152495 | METHOD FOR MOULDING POLY(1,4-DIOXANONE) - A method of moulding a bioresorbable polymer for producing a bioresorbable medical device includes the following successive steps: (a) heating a poly(1,4-dioxanone) in the absence of any solvent of this polymer to a mass temperature between 145° C. and 165° C., (b) injection moulding the molten mass obtained in step (a) in a mould which is at a temperature of 80° C. to 115° C. lower than the mass temperature of the poly(1,4-dioxanone), (c) cooling the mould until solidification of the mass of poly(1,4-dioxanone), and (d) removing the thus obtained part from the mould. Also described is a moulded part which can be obtained by such a method as well as a medical device containing such a part. | 06-23-2011 |
| 20110196125 | Degradable Polymers for Hydrocarbon Extraction - The present disclosure is directed degradable polymers. The polymers are solid when maintained under substantially dry conditions at a temperature of up to about 90 degrees C. When contacted with water at a temperature of up to about 90 degrees C., however, the polymers initially remain solid for a period of up to about 6 to about 24 hours, then depolymerize to provide a liquid having a viscosity of from about 1 to about 200,000 centipoise after a period of time from about 8 hours to about 3 days and then further depolymerizes to water-soluble components after a period of time at least about 3 days. Also disclosed are sand screen coatings made with the polymers and hydraulic and acid fracturing methods using the polymers. | 08-11-2011 |
| 20110237772 | POLYESTERACETALS - A polyesteracetal contains —[C(O)(CR | 09-29-2011 |
| 20110288268 | POLYLACTIC ACID RESIN, TEXTILE PRODUCTS OBTAINED THEREFROM, AND PROCESSES FOR PRODUCING TEXTILE PRODUCTS - A flat yarn includes a linear polylactic acid resin prepared from lactic acid monomers, wherein at least 95 mol % of the lactic acid is an L-isomer. | 11-24-2011 |
| 20110306749 | METHODS FOR PRODUCING LACTIDE WITH RECYCLE OF MESO-LACTIDE - An S, S- and R,R-lactide stream suitable for polymerization is prepared by producing a low molecular weight poly(lactic acid), depolymerizing the low molecular weight poly(lactic acid) to form a mixture of S, S-, R,R- and meso-lactide, and separating meso-lactide from this mixture to form an S, S- and R,R-lactide stream. Meso-lactide is recycled into the process, and shifts the mole fractions of the lactides in the lactide mixture that is produced. | 12-15-2011 |
| 20120065359 | COLORANT-POLYESTERS AND METHODS OF PRODUCING COLORANT-POLYESTERS - An enzymatic polymerization method of covalently linking a colorant to a polyester to produce a colorant-polyester compound, the method including the steps of: (a) providing a reaction solution comprised of an ester monomer, a colorant having or functionalized to have a hydroxyl group, and an enzymatic catalyst; (b) reacting the ester monomer and the colorant using the enzymatic catalyst to produce a polymeric product, wherein the polymeric product includes a colorant-polyester compound; and (c) separating the polymeric product from the reaction solution. A colorant-polyester compound includes a colorant covalently linked to a polyester and the polyester is obtained by polymerizing a lactone. | 03-15-2012 |
| 20120077954 | PROCESS FOR REDUCING MOISTURE IN A BIODEGRADABLE IMPLANT DEVICE - The disclosed process comprises freeze-drying a biodegradable implant device comprised or one or more polyesters to thereby reduce moisture content in the device. | 03-29-2012 |
| 20120245321 | MANUFACTURING LACTIDE FROM LACTIC ACID - Disclosed is a method for manufacturing | 09-27-2012 |
| 20120309929 | PROCESS AND APPARATUS FOR PRODUCING ALIPHATIC POLYESTER - A process for producing an aliphatic polyester includes the steps of: heating a cyclic ester at a melting point or higher to transform the cyclic ester into molten state and convert a moisture contained in the cyclic ester into free carboxylic acid; measuring an amount of the free carboxylic acid in the molten cyclic ester; feeding a proton-source compound in an amount determined based on the measured amount of the free carboxylic acid into the molten cyclic ester; and subjecting the cyclic ester to ring-opening polymerization. The process provides an aliphatic polyester with a desired molecular weight which can be set easily and accurately. An apparatus for the process is also provided. | 12-06-2012 |
| 20120316317 | PHOTOALIGNING MATERIAL WITH LATERAL SUBSTITUTION - The present invention relates to photoaligning material with lateral substitution, compositions thereof, and its use for optical and electro optical devices, especially liquid crystal devices (LCDs). | 12-13-2012 |
| 20130041129 | Controlling Moisture In And Plasticization Of Bioresorbable Polymer For Melt Processing - Methods and systems for controlling the moisture content of biodegradable and bioresorbable polymer resin during extrusion above a lower limit that allows for plasticization of the polymer resin melt and below an upper limit to reduce or prevent molecular weight loss are disclosed. Methods are further disclosed involving plasticization of a polymer resin for feeding into an extruder with carbon dioxide and freon. | 02-14-2013 |
| 20130046075 | PROCESS FOR GAMMA-BUTYROLACTONE PRODUCTION - A double-walled plastic jar for cosmetic materials, having an inner compartment to hold the cosmetic, and an annular outer side wall defining the exterior of the jar. The inner compartment carries the lip that seals with a screw cap, and also carries an external skirt, which latter has the screw threads for engagement by the cap. In addition, a weight is disposed in a-concealed manner in the base of the jar, between the walls, to give the jar a heft feel, characteristic of glass or thick plastic walls. | 02-21-2013 |
| 20130116399 | METHOD FOR CARRYING OUT POLYMERISATION PROCESSES - A method for carrying out polymerization processes, includes a first step involving polymerization or co-polymerization of a monomer or monomers, and a second step involving a separation step. In an embodiment, before the separation step, during the separation step, or both before and during the separation step, one or more substance is added to the reaction mixture that induces stripping, influencing of the temperature, or both stripping and influencing of the temperature such that the reaction equilibrium is shifted to the polymers and the rate of reaction to the monomer is slowed. In embodiments, before and/or in the second step, a substance is added to the reaction mixture so that a stop is achieved, and as a further function stripping and/or influencing of temperature occurs. | 05-09-2013 |
| 20130137846 | POLYIMIDE FIBER WITH HIGH STRENGTH AND HIGH MODULUS AND ITS PREPARATION METHOD - A high-strength high-modulus polyimide fiber and its preparation method pertain to the technical field of high-performance organic fiber. This fiber includes the polyimide (PI) fiber made from 3,3′,4,4′-biphenyl tetracarboxylic diandhydride (BPDA), p-phenylenediamine (pPDA) and 2-(4-aminophenyl)-1H-benzimidazol-5-amine (BIA), wherein the molar ratio between PPDA and BIA is 1:10˜3:1. During the synthesis, other diamine and diandhydride monomers may also be added. In the preparation process, the gradient temperature reaction method and one-step continuous preparation method are adopted, the synthesis and processing difficulty caused by the increase of the content of BIA is overcome, the problem of poor uniformity and stability of fiber is solved and PI fiber with high strength and high modulus is obtained. Its strength may reach 4.5 GPa and modulus may reach 201 GPa. Moreover, the sources of the raw materials are extensive, the spinning process is continuous, the cost is low, the efficiency is high and industrial production may be realized. | 05-30-2013 |
| 20130144029 | MICROORGANISMS AND METHODS FOR THE PRODUCTION OF CAPROLACTONE - The invention provides non-naturally occurring microbial organisms containing caprolactone pathways having at least one exogenous nucleic acid encoding a butadiene pathway enzyme expressed in a sufficient amount to produce caprolactone. The invention additionally provides methods of using such microbial organisms to produce caprolactone by culturing a non-naturally occurring microbial organism containing caprolactone pathways as described herein under conditions and for a sufficient period of time to produce caprolactone. | 06-06-2013 |
| 20130165622 | Lactic Acid-Isosorbide Copolyesters And Process For The Preparation Thereof - Copolyester with improved transition temperature, melting temperature and crystallinity including units derived from lactic acid and isosorbide, where the ratio of lactic acid to isosorbide ranges from 99:1 to 50:50. | 06-27-2013 |
| 20130253166 | Manufacture of polylactide-based articles by rotational molding - The present invention relates to a method for manufacturing polylactide-based articles by rotational moulding and also to the articles obtained by the method. | 09-26-2013 |
| 20130324697 | Method for the Manufacture of a Polyhydroxy-Carboxylic Acid - Disclosed is a method to prepare a polylactic acid comprising the steps of performing a ring opening polymerization using a catalyst and either a catalyst killer compound or an endcapping additive to obtain a raw polylactic acid of MW greater than 10,000 g/mol, purifying the raw polylactic acid by removing and separating low boiling compounds comprising lactide and impurities from the raw polylactic acid by devolatization of the low boiling compounds as a gas phase stream, and purifying the lactide from the devolatization and removing the impurities from the gas phase stream of evaporated low boiling compounds by means of crystallization by desublimation from the gas phase, wherein the lactide is purified and the removed impurities include a catalyst residue and a compound containing at least one hydroxyl group such that the purified lactide is then polymerized by feeding it back into the ring opening polymerization. The invention further relates to an apparatus for carrying out the method comprising a polymerization reactor for performing a ring opening polymerization to obtain a raw polylactic acid, a devolatization apparatus for separating low boiling compounds comprising lactide and impurities from a raw polylactic acid, and a crystallization apparatus for purifying a lactide and removing impurities by means of a desublimation and a crystallization in the same crystallization apparatus. | 12-05-2013 |
| 20130331543 | Method for the Manufacture of a Polyhydroxy-Carboxylic Acid - Disclosed is a method to prepare a polylactic acid comprising the steps of: performing a ring opening polymerization using a catalyst and either a catalyst killer compound or an endcapping additive to obtain a raw polylactic acid of MW greater than 10,000 g/mol, purifying the raw polylactic acid by removing and separating low boiling compounds comprising lactide and impurities from the raw polylactic acid by devolatization of the low boiling compounds as a gas phase stream, purifying the lactide from the devolatization and removing the impurities from the gas phase stream of evaporated low boiling compounds by means of condensing the evaporated gas phase stream to give a condensed stream and a subsequent melt crystallization of the condensed stream, wherein the lactide is purified and the removed impurities include a catalyst residue and a compound containing at least one hydroxyl group such that the purified lactide is polymerized by feeding it back into the ring opening polymerization. The invention further relates to an apparatus for carrying out the method comprising: a polymerization reactor for performing a ring opening polymerization to obtain a raw polylactic acid, a devolatization apparatus for removing and separating low boiling compounds comprising lactide and impurities from a raw polylactic acid, and a crystallization apparatus for purifying a lactide and removing impurities from a condensed stream, wherein a condenser for condensing a gas phase stream to give a condensed stream is arranged between the devolatization apparatus and the crystallization apparatus. | 12-12-2013 |
| 20140018514 | PROCESS FOR PRODUCING GLYCOLIC ACID - Glycolic acid having a high purity is obtained by subjecting glycolic acid or a glycolic acid solution containing contaminants to double-chamber electrodialysis combined with one or more treatments selected from among treatment with an activated carbon, treatment with an ion exchange resin, concentration treatment and cooling crystallization. | 01-16-2014 |
| 20140171615 | ALIPHATIC POLYESTER MANUFACTURING METHOD - A process for producing an aliphatic polyester, comprising: subjecting at least two serial stages of bulk-phase ring-opening polymerization and a solid-phase polymerization step, wherein a cyclic ester held in a dry air atmosphere is supplied to a first reactor to perform a first stage polymerization, thereby obtaining a partially polymerized molten product, and the resultant partially polymerized molten product is supplied to a second reactor held under a dry inert gas atmosphere to perform a second stage polymerization. As a result, the production efficiency can be improved, while maintaining excellent properties of the aliphatic polyester product. | 06-19-2014 |
| 20150361213 | POLYMER PRODUCT AND PRODUCTION METHOD THEREOF, AND POLYMER PRODUCT PRODUCING APPARATUS - Provided is a polymer product, in which the weight average molecular weight measured by gel permeation chromatography is 250,000 or greater and the content of residual ring-opening-polymerizable monomer is 100 ppm by mass or greater but less than 1,000 ppm by mass, or a polymer product, in which the content of residual ring-opening-polymerizable monomer is from 1,000 ppm by mass to 20,000 ppm by mass and the yellow index (YI) value is 15 or less. | 12-17-2015 |
| 20160002393 | METHOD FOR PREPARING POLYMER MICROPARTICLES BY SPRAY PROCESS - The present invention relates to a method for preparing polymer microparticles by a spray process, wherein a polymer solution obtained by dissolving a polyester-based polymer in ethylene carbonate (hereinafter, referred to as “EC”), which is a solvent, is sprayed at a low temperature hydrocarbon or alcohol solution, thereby preparing frozen EC/polymer microparticles, the frozen EC/polymer microparticles are dissolved in a salt aqueous solution, thereby dissolving and removing EC, and the residual EC in water is removed by washing. | 01-07-2016 |
| 20160002398 | Novel Method for Purifying Polyesters - The invention relates to a method for purifying a polyester including impurities, said impurities including at least 0.1% by weight of a polyester or of residual monomer(s), including at least one step of: (ii) adding, to the polyester in a solvent, a functionalized material selected between a PAMAM dendrimer and a resin functionalized by one or more primary and/or secondary amine functions. Said method enables a low level of residual monomer(s) to be obtained while providing economically and environmentally advantageous reaction conditions. | 01-07-2016 |
| 20160009855 | METHOD FOR PERFORMING MECHANICAL, CHEMICAL AND/OR THERMAL PROCESSES | 01-14-2016 |
| 20160024246 | MICROPHASE SEPARATION OF BLOCK COPOLYMER BOTTLEBRUSHES - Provided herein are microphase-separated materials including a plurality of block copolymers tethered together at their A-B junction points. The tethered-together block copolymers, referred to as a block copolymer bottlebrush, provide microphase-separated materials having smaller domain spacing than previously achievable using block copolymer systems. | 01-28-2016 |
| 20160068630 | Process for Preparing Polycarbonates by Polymerization of Five-Membered-Ring Cyclic Carbonates - A process for the preparation of polycarbonates may include ring-opening polymerization of five-membered cyclic carbonates in the presence of a catalyst; a compound of formula (I), stereoisomers, racemics, or mixtures thereof; and optionally cyclic esters, stereoisomers, racemics, or mixtures thereof. Formula (I) is: | 03-10-2016 |
| 20160083507 | METHOD FOR PURIFYING ALIPHATIC POLYESTER AND ALIPHATIC POLYESTER PURIFIED WITH SAID METHOD - Provided is a method for purifying an aliphatic polyester which reduces coloring of the aliphatic polyester, reduces the amount of residual monomer and residual catalyst, and improves stability and appearance. This method for purifying an aliphatic polyester subjects an aliphatic polyester containing a monomer to heat treatment under dry air containing oxygen at a temperature at or above the melting point of the monomer and at or below the melting point of the aliphatic polyester. | 03-24-2016 |
| 20180022916 | METHOD OF PREPARING POLYMER COMPOUND | 01-25-2018 |
| 528355000 | Polymerizing in the presence of a specified material other than a reactant | 37 |
| 20090124787 | Method for Producing Polyhydroxyalkanoates - The invention relates to a process for preparing polyhydroxyalkanoates by polymerization of lactones of the general formula I, | 05-14-2009 |
| 20100240859 | Semi-Crystalline Absorbable Microspheres - The present invention is directed to absorbable microspheres comprising a copolymer formed from greater than 88 to about 99 mole percent ε-caprolactone or p-dioxanone, and about 1 to less than 12 mole percent of a different second monomer selected from the group consisting of glycolide, p-dioxanone, trimethylene carbonate and the lactides and combinations thereof, said microspheres having a particle size ranging from about 5 to 2,000 microns. Also described herein are a method for making such microspheres and formulations comprising such absorbable microspheres. | 09-23-2010 |
| 20110319588 | ISOTACTIC POLYLACTIC ACID AND METHOD FOR PRODUCING SAME - Method of polymerization for producing polylactic acid of configuration L or D, with number-average molecular weight between 60 000 and 200 000 having an insertion defect rate between 0 and 0.5 wt. % of polylactic acid and a racemization defect rate between 0 and 2.5 wt. % of polylactic acid, characterized in that the method is a bulk process comprising contacting, at a temperature between 170 and 200° C. and for a reaction time between 5 and 75 minutes, the corresponding lactide of stereochemical configuration L-L or D-D having an optical purity of L or D of at least 99.5 wt. % with at least one catalyst in the presence of an initiator to form poly-L-lactic acid or poly-D-lactic acid. | 12-29-2011 |
| 20140179893 | BRANCHED LACTIC ACID POLYMERS WITH HIGH VISCOSITY IN THE MOLTEN STATE AND HIGH SHEAR SENSITIVITY, AND NANOCOMPOSITES THEREOF - Disclosed is a polymer obtainable by bulk polymerization of lactide or lactic acid or a lactic acid copolymer obtainable by copolymerization of lactide or lactic acid with glycolide, glycolic acid and/or hydroxyacids in open or closed (cyclic) form in the presence of at least two organic and/or organic/inorganic chain regulators or a functionalized nanoparticle (nanosilica, montmorillonite). | 06-26-2014 |
| 20140200326 | POLYMER PRODUCT, POLYMER COMPACT, POLYMER COMPACT FOR MEDICAL USE, TONER, AND POLYMER COMPOSITION - To provide a polymer product, which is substantially free from an organic solvent and a metal atom, and has a number average molecular weight of 12,000 or greater. | 07-17-2014 |
| 20160137774 | LACTONE POLYMERIZATION WITH LATENT INITIATORS - The present invention relates to a novel, rapid initiating mechanism for anionic, ring-opening polymerization of lactones by means of latent initiators based on N-heterocyclic carbene compounds which can be thermally activated, such as, in particular, N-heterocyclic carbene-CO | 05-19-2016 |
| 528356000 | Material contains a phosphorus or sulfur atom | 7 |
| 20090171065 | POLYETHER-POLYLACTIC ACID COMPOSITION AND POLYLACTIC ACID FILM CONTAINING SAME - A polyether-polylactic acid composition is excellent in storage stability, melt stability and hue. The polyether-polylactic acid composition includes a polyether and polylactic acid component and has a residual lactide content is 0.3 wt % or less, and an acid value is 50 equivalent/t or less. | 07-02-2009 |
| 20090171066 | Catalytic lactide and glycolide (co)polymerization system - A catalytic lactide and glycolide copolymerization system comprising a trifluoromethane sulfonate as a catalyst and copolymerization additive and a copolymerization process. | 07-02-2009 |
| 20090176963 | Organic-acid-based catalyst for production of polylactic acid - Provided is a new organic-acid-based catalyst enabling production of a polyhydroxycarboxylic acid by direct dehydration polycondensation of a hydroxycarboxylic acid such as L-lactic acid, specifically, an organic-acid-based catalyst comprising an amine salt of a sulfonic acid or a phosphine salt of a sulfonic acid for production of polyhydroxycarboxylic acids such as poly-L-lactic acid. | 07-09-2009 |
| 20090306333 | BIFUNCTIONAL LACTIDE MONOMER DERIVATIVE AND POLYMERS AND MATERIALS PREPARED USING THE SAME - The invention described herein provides a novel lactide monomer derivative and process for preparing the lactide monomer derivative. The monomer derivative of the invention is bifunctional in nature, and can be employed a variety of efficient synthesis processes to prepare various polymers. Further, the bifunctional monomer derivative can be used to prepare various intermediate-stage compounds and polymers, which in turn can be used to synthesize other compounds, polymers, copolymers and composites. The lactide monomer derivative has a bifunctional norbornene spiro lactide structure, spiro[6-methyl-1,4-dioxane-2,5-dione-3,2′-bicyclo[2.2.1]hept[5]ene], and structure as follows: | 12-10-2009 |
| 20110054144 | NOVEL CATALYTIC SYSTEMS FOR THE RING-OPENING (CO)POLYMERIZATION OF LACTONES - The present invention relates to the use of a system composed of a base and of a sulphonamide, as a catalyst for the ring-opening (co)polymerization of lactones. The present invention also relates to novel sulphonamides and to a process for the ring-opening (co)polymerization of lactones comprising the use of sulphonamides in combination with a base as a catalytic system. | 03-03-2011 |
| 20120202966 | METHOD FOR PRODUCING POLYESTERS AND CO-POLYESTERS FROM LACTONES - The invention relates to a method for producing polyesters and co-polyesters from lactones | 08-09-2012 |
| 20150025216 | PRODUCTION METHOD FOR ALIPHATIC POLYESTER - To efficiently produce an aliphatic polyester and to improve the thermal stability of the resulting aliphatic polyester. | 01-22-2015 |
| 528357000 | Material contains a metal atom | 24 |
| 20120016101 | POLYLACTIDE RESIN AND PREPARATION METHOD THEREOF - The present invention is directed to an organometallic complex and a catalyst composition capable of producing polylactide resins with improved properties at a higher conversion rate, a method of producing the organometallic complex, polylactide resins having enhanced hydrolysis resistance and heat resistance together with superior mechanical properties, a preparation process therefor, and polylactide resin compositions including the same. | 01-19-2012 |
| 20120136134 | PROCESS FOR PREPARING A POLYESTER - Disclosed is a process for preparing a polyester or copolymer containing ester functionalities. The process can comprise:
| 05-31-2012 |
| 20120245322 | MANUFACTURING LACTIDE FROM LACTIC ACID - Disclosed is a method for manufacturing D-lactide from liquid D-lactic acid and a method for manufacturing D-polylactic acid with a weight-average molecular weight 50,000-20,000 g/mol from the prepared D-lactide. The disclosed method is advantageous in that D-lactide can be prepared in high yield through a relatively simple process as compared to the existing method. Thus, the cost for producing D-polylactic acid from the D-lactide can be reduced. | 09-27-2012 |
| 20120253005 | CONDITIONING OF DOUBLE METAL CYANIDE CATALYSTS - The invention relates to a method for conditioning double metal catalysts which are used in the production of polyether polyols. The conditioning enhances the performance of the catalyst, so that lower concentrations of the DMC catalyst can be used in polyether polyol production. | 10-04-2012 |
| 20120277403 | METHOD FOR BULK POLYMERIZATION OF LACTIDE - Process for bulk polymerization of lactide at a temperature between 160° C. and 195° C. in the presence of a zinc-based catalyst. | 11-01-2012 |
| 20120302724 | MANUFACTURING METHOD OF LACTIDE FROM LACTIC ACID - The present invention provides a method of producing D-type lactide from liquid D-type lactic acid, and a method for producing D-type polylactic acid having a weight average molecular weight of about 50,000˜20,000 g/mol from the produced D-type lactide. The method of the present invention is advantageous in that D-type lactide can be obtained at a high yield by a simple method, compared to the conventional production methods. Consequently, production cost of D-type polylactic acid that is finally obtained from D-type lactide can be reduced. | 11-29-2012 |
| 20130030147 | MANUFACTURING METHOD OF COLORED POLYLACTIC ACID RESIN - Disclosed is a technique of providing color to a polylactic acid resin which is promising as a plant-derived material for automotive interior/exterior parts. When a polylactic acid material is used as a covering fiber material of an automotive interior part, coloring is necessary for harmonization with other parts in the car. According to the disclosed technique, color is provided to a polylactic acid resin using a combination of a catalyst and an initiator when it is polymerized from lactide. The disclosed method is time-saving and economical since a colored resin can be polymerized and thus the complicated process of dyeing a white resin using a disperse dye and washing and drying the same can be avoided. | 01-31-2013 |
| 20130066042 | BIO-DEGRADABLE/ABSORBABLE POLYMER HAVING REDUCED METAL CATALYST CONTENT, AND PROCESS FOR PRODUCTION THEREOF - The present invention provides a method for reducing the content of a metal catalyst in a biodegradable and absorbable polymer that can be applied on an industrial scale and a method for producing a biodegradable and bioabsorbable polymer having a metal catalyst content of less than 1 ppm in terms of a metal. The method includes the steps of (1) copolymerizing lactide and ε-caprolactone at a molar ratio ranging from 40/60 to 60/40 or 65/35 to 85/15 in the presence of the metal catalyst to produce a copolymer; and (2) washing the copolymer with a mixed solvent comprising acetic acid and isopropanol at a volume ratio ranging from 25/75 to 45/55 or 45/55 to 55/45 at less than 40° C., and drying the copolymer. | 03-14-2013 |
| 20130158230 | Carbonylative Polymerization Methods - Provided are methods forming polymers. The methods include, for example, tandem carbonylation and polymerization reactions, where epoxides are catalytically carbonylated to form lactones and the lactones catalytically polymerized to form polymers without the need to isolate or purify the lactone intermediate. Also provided are methods for catalytically polymerizing beta-propiolactone. Homopolymers and copolymers can be formed using the methods disclosed herein. | 06-20-2013 |
| 20130178598 | METHOD FOR PRODUCING POLYLACTIC ACID - To provide a method capable of producing stereocomplex polylactic acid, the method being capable of using carbon neutral materials that are not competitive from foods, such as saccharides, without the use of a method for designing optical resolution, which requires complicated operations and high cost and is difficult to perform mass production. The production method of the present invention comprises: a step of reacting glycerin with sodium hydroxide in high-temperature and high-pressure water to produce a racemic sodium lactate aqueous solution; a step of separating sodium from the racemic sodium lactate aqueous solution to recover racemic lactic acid; a step of dimerizing the racemic lactic acid to produce a lactide mixture containing meso lactide and racemic lactide; a step of separating meso lactide from the mixture to recover racemic lactide; and a step of polymerizing the racemic lactide with a salen-metal complex as a catalyst to produce stereocomplex polylactic acid. | 07-11-2013 |
| 20130211041 | PROCESS FOR THE PREPARATION OF POLYETHERESTER POLYOLS - Disclosed is a process for the preparation of polyetherester polyols prepared with hybrid catalysts, the polyether esters obtained from the process and the use of such materials in polyurethane applications. The hybrid catalysts used in this invention comprise double metal cyanide complex catalysts (DMC) and at least one co-catalyst. | 08-15-2013 |
| 20140018515 | POLYLACTIDE RESIN AND PREPARATION METHOD THEREOF - The present invention is directed to an organometallic complex and a catalyst composition capable of producing polylactide resins with improved properties at a higher conversion rate, a method of producing the organometallic complex, polylactide resins having enhanced hydrolysis resistance and heat resistance together with superior mechanical properties, a preparation process therefore, and polylactide resin compositions including the same. | 01-16-2014 |
| 20140018516 | POLYLACTIDE RESIN AND PREPARATION METHOD THEREOF - The present invention is directed to an organometallic complex and a catalyst composition capable of producing polylactide resins with improved properties at a higher conversion rate, a method of producing the organometallic complex, polylactide resins having enhanced hydrolysis resistance and heat resistance together with superior mechanical properties, a preparation process therefor, and polylactide resin compositions including the same. | 01-16-2014 |
| 20140213754 | METHOD FOR PRODUCING POLYMER, AND POLYMER PRODUCT - To provide a method for producing a polymer, which contains: bringing an intermediate polymer, which has been obtained through ring-opening polymerization of a ring-opening polymerizable monomer, into contact with, and melting the intermediate polymer in a compressive fluid having a density of 230 kg/m | 07-31-2014 |
| 20150299083 | PROCESS FOR PRODUCTION OF ACRYLATES FROM EPOXIDES - In one aspect, the present invention encompasses integrated processes for the conversion of epoxides to acrylic acid derivatives and polyesters. In certain embodiments, the methods of the present invention comprise the steps of: providing a feedstock stream comprising an epoxide and carbon monoxide; contacting the feedstock stream with a metal carbonyl in a first reaction zone to effect conversion of at least a portion of the provided epoxide to a beta lactone; directing the effluent from the first reaction zone to a second reaction zone where the beta lactone is subjected to conditions that convert it to a compound selected from the group consisting of: an alpha beta unsaturated acid, an alpha beta unsaturated ester, an alpha beta unsaturated amide, and an optionally substituted polypropiolactone polymer; and isolating a final product comprising the alpha-beta unsaturated carboxylic acid, the alpha-beta unsaturated ester, the alpha-beta unsaturated amide or the polypropiolactone. | 10-22-2015 |
| 20160009856 | MANUFACTURING METHOD OF LACTIDE FROM LACTIC ACID | 01-14-2016 |
| 20160053049 | METHOD FOR PRODUCING LACTIDE-LACTONE COPOLYMER - This invention provides a novel method for producing a lactide-lactone copolymer. The method is characterized by copolymerizing a lactide and a lactone using a molybdenum compound as a catalyst. | 02-25-2016 |
| 20160075821 | Method to Manufacture PLA Using a New Polymerization Catalyst - The invention relates to a method for manufacturing polylactide, comprising the steps of mixing lactide and a metal-coordination compound as polymerization catalyst to obtain a reaction mixture, polymerizing the lactide in liquid phase at a temperature of at least 150° C. to form polylactide in liquid phase and allowing the polylactide to solidify, characterized in that the polymerization catalyst comprises a metal-ligand coordination compound whereby the parent ligand answers the formula (I), whereby R represents an H atom, an aliphatic group, a halide atom or a nitro group and the metal is at least one of Zr and Hf. The invented catalysts show kinetics which is comparable to the kinetics of the known Sn-octoate catalyst. | 03-17-2016 |
| 20160137775 | METHOXYPOLYETHYLENE GLYCOL-POLYLACTIC ACID BLOCK COPOLYMER AND PREPARATION METHOD THEREOF - A methoxypolyethylene glycol-polylactic acid block copolymer is disclosed, the methoxypolyethylene glycol-polylactic acid block copolymer being a block copolymer formed by ring opening polymerization of D,L-lactide and methoxypolyethylene glycol. A mass ratio of the methoxypolyethylene glycol to the D,L-lactide is 1:0.55-0.65 or 1:0.73-0.89 or 1:0.91-0.99. A preparation method of the foregoing block copolymer is also provided. When the block copolymer is used as a carrier for preparing a drug micelle, the encapsulation efficiency of the drug micelle prepared after being re-dissolved by water can be greater than 90% at 12 hours. | 05-19-2016 |
| 20180022868 | ALIPHATIC POLYESTER COMPOSITION, MOLDED PRODUCT, AND MANUFACTURING METHOD OF ALIPHATIC POLYESTER | 01-25-2018 |
| 528358000 | Material contains a Group IA (Li, Na, K, Rb, Cs, Fr) or Group IIA metal atom (Be, Mg, Ca, Sr, Ba, Ra) | 4 |
| 20110313127 | METHOD FOR PRODUCING POLYLACTIC ACID - Provided is a method for producing polylactic acid comprising the step of a ring-opening polymerization of lactide in the presence of an alkylaluminum compound represented by the following formula (1): | 12-22-2011 |
| 20160083510 | BLOCK COPOLYMER AND PROCESS FOR PREPARING THE SAME - The invention relates to a block copolymer comprising a first block of general structure formula (II) and a second block of general structure formula (III) wherein Rx is an organic group having a chain length of from 1-9 atoms; R | 03-24-2016 |
| 20160096919 | METHOD FOR PREPARING A POLYESTER - The invention is directed to a method for preparing a polyester comprising providing a first cyclic ester having a ring size of from 12-40 atoms and subjecting the first cyclic ester to ring-opening polymerisation by contacting the first cyclic ester with a catalyst of formula I. | 04-07-2016 |
| 20180022867 | METHOD FOR PRODUCING POLYESTER | 01-25-2018 |
| 528359000 | Heterocyclic ring compound is a four-membered ring containing one oxygen and three carbon atoms -C-C(=O)-O-C- | 1 |
| 20140309399 | PROCESS FOR PRODUCTION OF ACRYLATES FROM EPOXIDES - The methods of the present invention comprise the steps of: providing a feedstock stream comprising an epoxide and carbon monoxide; contacting the feedstock stream with a metal carbonyl in a first reaction zone to effect conversion of at least a portion of the provided epoxide to a beta lactone; directing the effluent from the first reaction zone to a second reaction zone where the beta lactone is subjected to conditions that convert it to a compound selected from the group consisting of: an alpha beta unsaturated acid, an alpha beta unsaturated ester, an alpha beta unsaturated amide, and an optionally substituted polypropiolactone polymer; and isolating a final product comprising the alpha-beta unsaturated carboxylic acid, the alpha-beta unsaturated ester, the alpha-beta unsaturated amide or the polypropiolactone. | 10-16-2014 |
