Material Contains A Metal Atom Patents (Class 528/357)
  • Patent number: 10030106
    Abstract: The present invention provides methods for producing block copolymers, either by the sequential addition of monomers, or using a “one-pot” method. The invention also relates to novel methods for producing polyesters by ring opening lactides and/or lactones and by copolymerizing anhydrides and epoxides.
    Type: Grant
    Filed: May 16, 2014
    Date of Patent: July 24, 2018
    Assignee: Imperial Innovations Limited
    Inventors: Charlotte Katherine Williams, Charles Romain, Michael Kember
  • Patent number: 9808362
    Abstract: Stents fabricated from polymer composites toughened by a dispersed phase are disclosed.
    Type: Grant
    Filed: May 14, 2015
    Date of Patent: November 7, 2017
    Assignee: Abbott Cardiovascular Systems Inc.
    Inventors: Syed F. A. Hossainy, David C. Gale, Stephen Dirk Pacetti, Bin Huang
  • Patent number: 9518207
    Abstract: A method of servicing a wellbore comprising placing a wellbore servicing fluid comprising a modified friction reducer into the wellbore. A modified friction reducer comprising a degradable polymer having functional degradable moieties, a polymer having a molecular weight of from about 5M to about 30M, a polymer having a PDI of from about 1.0 to about 2.5, a weakly crosslinked polymer, or combinations thereof.
    Type: Grant
    Filed: June 29, 2012
    Date of Patent: December 13, 2016
    Assignee: Halliburton Energy Services, Inc.
    Inventors: James William Ogle, Xiangnan Ye, Pinmanee Boontheung, Rajesh Kumar Saini, Narongsak Tonmukayakul
  • Patent number: 9375509
    Abstract: The present invention relates to an isocyanate functional prepolymer that can be achieved through a) a reaction of an H functional starter compound having at least one Zerewitinoff active H atom with an alkylene oxide and a comonomer to a preliminary stage bearing hydroxyl groups, wherein said comonomer is selected from the group comprising lactides, glycolides, cyclical dicarboxylic acid anhydrides as well as combinations thereof and wherein said comonomer is integrated through statistical copolymerization into the polymer chain(s) of the preliminary stage bearing hydroxyl groups, and b) a reaction of the preliminary stage bearing hydroxyl groups from step a) with a polyfunctional isocyanate to an isocyanate functional prepolymer. The invention additionally relates to a process for producing this isocyanate functional prepolymer, a tissue adhesive system containing such an isocyanate functional prepolymer and a dispensing system having at least two chambers and this type of tissue adhesive system.
    Type: Grant
    Filed: December 17, 2012
    Date of Patent: June 28, 2016
    Assignee: Medical Adhesive Revolution GmbH
    Inventors: Heike Heckroth, Christoph Eggert, Jörg Hofmann, Klaus Lorenz
  • Patent number: 9340645
    Abstract: The present invention relates to the preparation of modified polymers by incorporating a compositional modifier into a polymer to produce the modified polymer. More particularly, the invention relates the preparation of condensation type copolyesters or copolyamides by joint short length polyester or polyester oligomers or short length polyamide or polyamide oligomers with a modifier which contains hydroxyl acids blocks.
    Type: Grant
    Filed: April 4, 2014
    Date of Patent: May 17, 2016
    Assignee: Molecon, Inc.
    Inventors: Bin Huang, Edwin W. Huang
  • Publication number: 20150148516
    Abstract: 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.
    Type: Application
    Filed: November 25, 2014
    Publication date: May 28, 2015
    Inventors: Jean-Francois Carpentier, Yann Sarazin, Valentin Poirier, Marion Helou
  • Publication number: 20150038651
    Abstract: Provided are novel dinuclear indium catalysts of formula (A) that are capable of living and immortal ring opening polymerization and copolymerization of cyclic ester monomers for the preparation of biodegradable polymers and copolymers, in particular polyesters. Also disclosed are polymerization methods and polymer products. These dinuclear indium catalysts allow less costly, highly reactive living polymerization of cyclic ester monomers with possible high turn over rates and/or substantial stereo chemical and microstructure control.
    Type: Application
    Filed: May 18, 2012
    Publication date: February 5, 2015
    Applicant: University of British Columbia
    Inventors: Parisa Mehrkhodavandi, Insun Yu, J. Alberto Acosta-Ramirez
  • Patent number: 8933190
    Abstract: Disclosed is a process for preparing a polyester or copolymer containing ester functionalities. The process can comprise: providing an optionally substituted lactone having a ring size of from 6 to 40 carbon atoms; and subjecting said lactone to metal mediated ring-opening polymerization using as catalyst a compound according to general formula (I): wherein M can be Al, Cr, Mn and Co; X and X? are independently a heteroatom; Y and Y? can be, independently, selected from O, N, S, P, C, Si, and B; Z can be selected from hydrogen, borohydrides, aluminum hydrides, carbyls, silyls, hydroxide, alkoxides, aryloxides, carboxylates, carbonates, carbamates, amidos, thiolates, phosphides, and halides; L1 and L2 can be independently an organic ligand linking X and Y together and linking X? and Y? together, respectively; and L3 is an optional organic ligand linking Y and Y? together.
    Type: Grant
    Filed: November 16, 2011
    Date of Patent: January 13, 2015
    Assignee: Saudi Basic Industries Corporation
    Inventors: Inge van der Meulen, Saskia Huijser, Erik Gubbels, Andreas Heise, Robert Duchateau, Cornelis Erne Koning
  • Patent number: 8927682
    Abstract: 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.
    Type: Grant
    Filed: August 25, 2008
    Date of Patent: January 6, 2015
    Assignee: Board of Trustees of Michigan State University
    Inventors: Gregory L. Baker, Milton R. Smith, III, Xuwei Jiang, Erin B. Vogel
  • Publication number: 20140364580
    Abstract: 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-?- caprolactone or polyactide, wherein an ?-caprolactone monomer or a lactide monomer is reacted in the presence of the metal alkoxide complex or catalyst composition to obtain poly-?-caprolactone or polylactide. The metal alkoxide complex and the catalyst composition thereof can be used to catalyze the synthesis of poly-?- caprolactone or polylactide with a high efficiency.
    Type: Application
    Filed: September 11, 2012
    Publication date: December 11, 2014
    Applicant: Changchun Institute of Applied Chemistry Chinese Academy of Sciences
    Inventors: Dongmei Cui, Xinli Liu, Bo Liu, Shihui Li, Dongtao Liu, Chunji Wu
  • Publication number: 20140213754
    Abstract: 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/m3 or greater, at temperature lower than a melting point of the intermediate polymer, at a ratio of 0.05 to 10, to dissolve a low-molecular-weight compound contained in the intermediate polymer in the compressive fluid, to thereby extract the low-molecular-weight compound, wherein the ratio is a ratio of a mass of the intermediate polymer to a mass of the compressive fluid.
    Type: Application
    Filed: January 22, 2014
    Publication date: July 31, 2014
    Inventors: Taichi NEMOTO, Chiaki Tanaka, Satoshi Izumi, Yoko Arai, Yasuo Kamada, Tatsuya Morita
  • Patent number: 8791228
    Abstract: Process for bulk polymerization of lactide at a temperature between 160° C. and 195° C. in the presence of a zinc-based catalyst.
    Type: Grant
    Filed: December 3, 2010
    Date of Patent: July 29, 2014
    Assignee: Futerro S.A.
    Inventor: Sabine Sirol
  • Patent number: 8759477
    Abstract: The present invention relates to a polysiloxane-polylactide block copolymer and a preparation method thereof, in which the polysiloxane-polylactide block copolymer has improved impact resistance and flexibility, compared to the conventional polylactide resins and can be prepared by ring-opening polymerization of lactide monomers in the presence of a polymerization initiator of polysiloxane.
    Type: Grant
    Filed: July 26, 2013
    Date of Patent: June 24, 2014
    Assignee: LG Chem, Ltd.
    Inventors: Seong-Woo Kim, Seung-Young Park, Sung-Cheol Yoon, In-Su Lee, Do-Yong Shim
  • Patent number: 8697832
    Abstract: 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.
    Type: Grant
    Filed: April 4, 2008
    Date of Patent: April 15, 2014
    Assignee: Indian Institute of Technology, Bombay
    Inventors: Hemant Nanavati, Vimal Katiyar
  • Publication number: 20140024769
    Abstract: Process and methods for making glycolic acid chemical intermediates and derivatives from biomass are described herein.
    Type: Application
    Filed: March 11, 2013
    Publication date: January 23, 2014
    Applicant: METABOLIX, INC.
    Inventors: Johan van Walsem, Erik Anderson, John Licata, Kevin A. Sparks, Christopher Mirley, M.S. Sivasubramanian
  • Publication number: 20140018516
    Abstract: 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.
    Type: Application
    Filed: September 16, 2013
    Publication date: January 16, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Sung-Cheol Yoon, In-Su Lee, Seong-Woo Kim, Seung-Young Park
  • Publication number: 20140018515
    Abstract: 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.
    Type: Application
    Filed: September 16, 2013
    Publication date: January 16, 2014
    Applicant: LG CHEM, LTD.
    Inventors: Sung-Cheol Yoon, In-Su Lee, Seong-Woo Kim, Seung-Young Park
  • Patent number: 8586643
    Abstract: A composition used for preparing foaming material comprising a polyhydroxyalkanoate, a polylactic acid and a foaming agent, which posses certain tensile strength, elongation in break and expansion ratio as well as full bio-degradability, thus can be used in packaging industry.
    Type: Grant
    Filed: October 16, 2006
    Date of Patent: November 19, 2013
    Inventors: Weichuan Lu, Mei Li
  • Patent number: 8575302
    Abstract: A composition which comprises polylactide and has excellent heat stability, color and hydrolytic resistance. The composition comprises (i) polylactide, (ii) a metal catalyst and (iii) a hypophosphorous acid-based deactivator or a metaphosphoric acid-based deactivator.
    Type: Grant
    Filed: October 4, 2006
    Date of Patent: November 5, 2013
    Assignees: Teijin Limited, Musashino Chemical Laboratory, Ltd.
    Inventors: Hirotaka Suzuki, Kiyotsuna Toyohara, Shin To
  • Patent number: 8552142
    Abstract: Copolymers exhibiting the following combinations of properties, including without limitation, ?-caprolactone in an amount ranging from about 12 to about 70 mole percent, glycolide in an amount ranging from about 30 to about 88 mole percent, crystallinity ranging from about 10 to about 50% as measured by WAXD or about 10 to about 50 J/g as measured by DSC, and an inherent viscosity ranging from about 0.5 to about 1.45 dL/g as measured in a 0.1 g/dl solution of HFIP at 25° C.; a method for melt blowing such copolymers and nonwoven constructs produced therefrom are described herein.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: October 8, 2013
    Assignee: Ethicon, Inc.
    Inventors: Modesto Erneta, Dennis D. Jamiolkowski, Jianguo J. Zhou, Sasa Andjelic
  • Publication number: 20130211041
    Abstract: 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.
    Type: Application
    Filed: August 20, 2010
    Publication date: August 15, 2013
    Applicant: BASF SE
    Inventors: Andreas Kunst, Berend Eling, Achim Loeffler, Xinkui Wang, Ning Ying, Hui Du, Maoqing Kang
  • Publication number: 20130178598
    Abstract: 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.
    Type: Application
    Filed: June 16, 2011
    Publication date: July 11, 2013
    Applicants: HITACHI ZOSEN CORPORATION, NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY, TOHOKU ELECTRIC POWER CO., INC.
    Inventors: Hisanori Kishida, Takashi Hasegawa, Kenji Miyaguchi, Takehiko Moriya, Nobuyoshi Nomura, Ryohei Ogawa
  • Patent number: 8481673
    Abstract: 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 ?-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.
    Type: Grant
    Filed: September 21, 2012
    Date of Patent: July 9, 2013
    Assignee: Gunze Limited
    Inventors: Hidetoshi Arimura, Yoshitake Takahashi, Koji Yamauchi
  • Patent number: 8476402
    Abstract: The present invention relates to a novel carbohydrate lactone, functionalized aliphatic polyesters and copolymers formed therefrom, and processes for the preparation thereof from renewable resources.
    Type: Grant
    Filed: March 27, 2009
    Date of Patent: July 2, 2013
    Assignee: Imperial Innovations Limited
    Inventors: Charlotte K. Williams, Molly Morag Stevens, Min Tang
  • Publication number: 20130158230
    Abstract: 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.
    Type: Application
    Filed: June 22, 2011
    Publication date: June 20, 2013
    Applicant: CORNELL UNIVERSITY
    Inventors: Geoffrey W. Coates, Erin Dunn
  • Patent number: 8436133
    Abstract: The present invention relates to the use of group 3 post-metallocene complexes based on sterically encumbered bis(naphthoxy)pyridine and bis(naphthoxy)thiophene ligands in the ring-opening polymerisation of polar monomers such as, for examples, lactones, lactides, cyclic carbonates.
    Type: Grant
    Filed: February 17, 2009
    Date of Patent: May 7, 2013
    Assignees: Total Petrochemicals Research Feluy, Centre National de la Recherche Scientifique (CNRS)
    Inventors: Jean-François Carpentier, Evgueni Kirillov, Abbas Razavi
  • Patent number: 8430948
    Abstract: The present invention relates to a condensation and washing device with which in particular the process vapors which occur during the production of polylactide can be processed and cleaned. Furthermore, the present invention relates to a polymerization device for the production of polylactide and also to a method for processing process vapors which occur during the production of polylactide; possibilities for use of both the condensation and washing devices and of the method are likewise mentioned.
    Type: Grant
    Filed: August 5, 2008
    Date of Patent: April 30, 2013
    Assignee: Uhde Inventa-Fischer GmbH
    Inventors: Rainer Hagen, Udo Muhlbauer
  • Patent number: 8431678
    Abstract: Method for the production of L,L-, D,D-, D,L- and meso-dilactides, comprising the polycondensation and/or polytransesterification of an L-, D- or D,L-lactic acid or of esters thereof to polyesters of higher molecular weights of the L-, D- and D,L-lactic acid (polylactic acids) and cyclizing depolymerization of the polylactic acids to dilactides, wherein the polyesters of higher molecular weights of the L-, D- and D,L-lactic acids are produced in the presence of hydrolysis-stable metal compounds as catalyst.
    Type: Grant
    Filed: November 14, 2008
    Date of Patent: April 30, 2013
    Assignee: Jungbunzlauer Austria AG
    Inventors: Gerald Rafler, Jutta Rafler, Andreas Windsperger, Robert Edlauer, Josef Gass
  • Publication number: 20130066042
    Abstract: 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 ?-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.
    Type: Application
    Filed: September 21, 2012
    Publication date: March 14, 2013
    Applicant: GUNZE LIMITED
    Inventor: GUNZE LIMITED
  • Patent number: 8394915
    Abstract: A polyesterification method comprises steps of mixing, by combining N,N-dialkylformamide dialkyl acetal with a tin catalyst, so as to transfer an alkoxy group from the N,N-dialkylformamide dialkyl acetal to the tin catalyst to obtain a Sn coordination complex; and polymerization, by conducting a ring-opening polymerization of a ester under the catalysis of the Sn coordination complex, and finally to obtain a polyester compound; wherein, the chemical formula of the N,N-dialkylformamide dialkyl acetal is (RO)2CHNR2, with the R being an alkyl group.
    Type: Grant
    Filed: July 22, 2011
    Date of Patent: March 12, 2013
    Assignee: Kaohsiung Medical University
    Inventors: Hsuan-Ying Chen, Hsin-Jou Fang
  • Patent number: 8389668
    Abstract: The use of a catalytic ring-opening lactide and glycolide (co)oligomerization system consisting of a strongly acidic ion-exchange resin-type polymeric catalyst and a (co)oligomerization additive, and a lactide and glycolide (co)oligomerization method using said catalytic system, are disclosed.
    Type: Grant
    Filed: March 15, 2005
    Date of Patent: March 5, 2013
    Assignee: Ipsen Pharma S.A.S.
    Inventors: Frédéric Ben, Didier Bourissou, Roland Cherif-Cheikh, Anne De Sousa Delgado, Magalie Graullier, Blanca Martin-Vaca
  • Publication number: 20130030147
    Abstract: 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.
    Type: Application
    Filed: November 1, 2011
    Publication date: January 31, 2013
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Chae Hwan Hong, Do Suck Han
  • Patent number: 8362171
    Abstract: Norbornene monomers with epoxy groups and polymer materials thereof are disclosed. The Norbornene monomers with epoxy groups are prepared by Diels-Alder reaction. The Norbornene monomers with epoxy groups are highly active for ring-opening-metathesis polymerization (ROMP), and the molecular weight and PDI value of the obtained polymers are controllable.
    Type: Grant
    Filed: October 5, 2007
    Date of Patent: January 29, 2013
    Assignee: National Taiwan University of Science & Technology
    Inventors: Der-Jang Liaw, Ching-Cheng Huang
  • Publication number: 20120302724
    Abstract: 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.
    Type: Application
    Filed: July 13, 2011
    Publication date: November 29, 2012
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Chae Hwan Hong, Si Hwan Kim, Ji Youn Seo, Do Suck Han
  • Publication number: 20120277403
    Abstract: Process for bulk polymerization of lactide at a temperature between 160° C. and 195° C. in the presence of a zinc-based catalyst.
    Type: Application
    Filed: December 3, 2010
    Publication date: November 1, 2012
    Applicant: FUTERRO S.A.
    Inventor: Sabine Sirol
  • Publication number: 20120253005
    Abstract: 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.
    Type: Application
    Filed: October 1, 2010
    Publication date: October 4, 2012
    Applicant: BASF SE
    Inventors: Igor Shishkov, Sirus Zarbakhsh, Ronald Adelmann, Wolfgang Rohde, Achim Loeffler
  • Patent number: 8278409
    Abstract: Copolymers exhibiting the following combinations of properties, including without limitation, ?-caprolactone in an amount ranging from about 12 to about 70 mole percent, glycolide in an amount ranging from about 30 to about 88 mole percent, crystallinity ranging from about 10 to about 50% as measured by WAXD or about 10 to about 50 J/g as measured by DSC, and an inherent viscosity ranging from about 0.5 to about 1.45 dL/g as measured in a 0.1 g/dl solution of HFIP at 25° C.; a method for melt blowing such copolymers and nonwoven constructs produced therefrom are described herein.
    Type: Grant
    Filed: April 22, 2008
    Date of Patent: October 2, 2012
    Assignee: Ethicon, Inc.
    Inventors: Modesto Erneta, Dennis D. Jamiolkowski, Jianguo Jack Zhou, Sasa Andjelic
  • Publication number: 20120245322
    Abstract: 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.
    Type: Application
    Filed: November 30, 2011
    Publication date: September 27, 2012
    Applicant: HYUNDAI MOTOR COMPANY
    Inventors: Chae Hwan Hong, Do Suck Han
  • Publication number: 20120202963
    Abstract: 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.
    Type: Application
    Filed: March 30, 2012
    Publication date: August 9, 2012
    Applicant: Asahi Glass Company, Limited
    Inventors: Chitoshi SUZUKI, Takeaki Arai, Masahito Furumi, Hideaki Tanaka, Takayuki Sasaki, Akio Horie
  • Publication number: 20120172537
    Abstract: To provide a process for producing a polyether, which comprises subjecting an alkylene oxide and the like to ring-opening addition polymerization to an initiator in the presence of a double metal cyanide complex catalyst (DMC catalyst), which can be carried out by use of a DMC catalyst at a low concentration, and accordingly the amount of the DMC catalyst remaining in a polyether to be obtained can be reduced. A process for producing a polyether, which comprises subjecting an alkylene oxide and an oxygen-containing heterocyclic compound other than an alkylene oxide, to ring-opening addition polymerization to an initiator having a hydroxy group in the presence of a DMC catalyst, wherein prior to the ring-opening addition polymerization, the DMC catalyst and the initiator are subjected to mixing treatment at a temperature of from 125° C. to 180° C. under an absolute pressure of at most 0.06 MPa for from 10 minutes to 24 hours.
    Type: Application
    Filed: March 13, 2012
    Publication date: July 5, 2012
    Applicant: Asahi Glass Company, Limited
    Inventors: Takeaki ARAI, Chitoshi Suzuki
  • Publication number: 20120136134
    Abstract: Disclosed is a process for preparing a polyester or copolymer containing ester functionalities. The process can comprise: providing an optionally substituted lactone having a ring size of from 6 to 40 carbon atoms; and subjecting said lactone to metal mediated ring-opening polymerization using as catalyst a compound according to general formula (I): wherein M can be Al, Cr, Mn and Co; X and X? are independently a heteroatom; Y and Y? can be, independently, selected from O, N, S, P, C, Si, and B; Z can be selected from hydrogen, borohydrides, aluminum hydrides, carbyls, silyls, hydroxide, alkoxides, aryloxides, carboxylates, carbonates, carbamates, amidos, thiolates, phosphides, and halides; L1 and L2 can be independently an organic ligand linking X and Y together and linking X? and Y? together, respectively; and L3 is an optional organic ligand linking Y and Y? together.
    Type: Application
    Filed: November 16, 2011
    Publication date: May 31, 2012
    Applicant: SAUDI BASIC INDUSTRIES CORPORATION
    Inventors: Inge van der Meulen, Saskia Huijser, Erik Gubbels, Andreas Heise, Robert Duchateau, Cornelis Erne Koning
  • Patent number: 8163866
    Abstract: An aromatic polyester resin composition, including: a melt-kneaded product of 99-70 wt. parts of an aromatic polyester resin and 1-30 wt. parts (providing a total of 100 wt. parts together with the aromatic polyester resin) of a polyglycolic acid resin, wherein the aromatic polyester resin is an aromatic polyester resin polymerized with a germanium compound (catalyst), and the polyglycolic acid resin is a polyglycolic acid resin obtained by ring-opening polymerization of glycolide. As a result, gas generation during the melt-processing of a composition obtained by adding a relatively small amount of polyglycolic acid resin to an aromatic polyester resin is effectively suppressed to provide an aromatic polyester resin composition with a good gas-barrier property.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: April 24, 2012
    Assignee: Kureha Corporation
    Inventors: Hiroyuki Sato, Kazuyuki Yamane, Yuki Hokari, Fuminori Kobayashi
  • Patent number: 8119763
    Abstract: In accordance with various embodiments, there is a method of making a polyester. The method can include providing a monomer solution, the monomer solution including one or more cyclic esters in a concentration ranging from about 1 to about 100% and one or more solvents in a concentration ranging from about 99% to about 0%. The method of making a polyester can also include providing a packed-bed reactor including one or more immobilized enzymes, wherein the packed-bed reactor has an inlet and an outlet. The method can further include circulating the monomer solution through the packed-bed reactor to generate a solution enriched with polyester, such that the one or more immobilized enzymes convert the one or more cyclic esters to polyester in the packed-bed reactor during circulation and collecting the solution enriched with polyester exiting through the outlet.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: February 21, 2012
    Assignee: Xerox Corporation
    Inventors: Jordan H. Wosnick, Santiago Faucher
  • Publication number: 20120016101
    Abstract: 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.
    Type: Application
    Filed: February 9, 2010
    Publication date: January 19, 2012
    Applicant: LG CHEM, LTD.
    Inventors: Sung-Cheol Yoon, In-Su Lee, Seong-Woo Kim, Seung-Young Park
  • Patent number: 8097736
    Abstract: The present invention is directed to a method for the manufacture of stable lactide particles, more specifically lactide particles which are stable enough to be stored and transported at room temperature and have a quality high enough for use as starting material for polylactic acid. The lactide particles are obtained via a flaking process, comprising the contacting of a continuous flow of molten lactide with a surface on which the lactide solidifies and subsequently is removed from said surface.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: January 17, 2012
    Assignee: Purac Biochem B.V.
    Inventor: Sicco De Vos
  • Publication number: 20110313127
    Abstract: 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): R1nAlX3-n??Formula (1) (wherein n represents an integer of 1 to 3; R1 may be the same or different and independently represents a linear or branched alkyl group having 1 to 10 carbon atoms; X may be the same or different and independently represents a halogen atom or a hydrogen atom; and Al represents an aluminum atom) as a ring-opening polymerization catalyst. The ring-opening polymerization of lactide further effectively proceeds in the presence of at least one kind of metal compounds selected from the group consisting of aluminum compounds (except the alkylaluminum compounds represented by the above formula (1)), zinc compounds, titanium compounds, zirconium compounds, magnesium compounds, and calcium compounds.
    Type: Application
    Filed: January 29, 2010
    Publication date: December 22, 2011
    Inventors: Naruhito Iwasa, Katsuhito Miura, Yoshiro Furukawa
  • Patent number: 8053584
    Abstract: The present case relates to a process for the purification of lactide from a crude lactide vapor product stream which process comprises a rectification/condensation step leading to a lactide-enriched condensate.
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: November 8, 2011
    Assignee: Tate & Lyle Public Limited Company
    Inventors: Johannes Meerdink, Nils Dan Anders Sädergard
  • Publication number: 20110218306
    Abstract: Embodiments of the polymerization process of the present invention are directed to polymerizing free radically polymerizable monomers in the presence of a polymerization medium initially comprising at least one transition metal catalyst and an atom transfer radical polymerization initiator. The polymerization medium may additionally comprise a reducing agent. The reducing agent may be added initially or during the polymerization process in a continuous or intermittent manner. The polymerization process may further comprises reacting the reducing agent with at least one of the transition metal catalyst in an oxidized state and a compound comprising a radically transferable atom or group to form a compound that does not participate significantly in control of the polymerization process.
    Type: Application
    Filed: February 14, 2011
    Publication date: September 8, 2011
    Applicant: Carnegie Mellon University
    Inventors: Krzysztof Matyjaszewski, Lindsay Bombalski, Wojciech Jakubowski, Ke Min, James Spanswick, Nicolay V. Tsarevsky
  • Patent number: 7884157
    Abstract: The invention concerns a process for preparing a block or comb copolymer comprising at least one hydrophilic portion and at least two hydrophobic portions, by anionic solvent-free polymerization of a prepolymer selected from a polyethylene glycol and a polyvinyl alcohol, and of a lactone or dilactone monomer. The process is carried out in the presence of an alkaline-earth metal hydride, in an inert atmosphere, and the polymerization step is not carried out under vacuum. The invention also concerns copolymers obtained by this process.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: February 8, 2011
    Assignees: Centre National de la Recherche Scientifique, Universite Montpellier 2 Sciences et Techniques
    Inventors: André Mas, Nadia Guerrouani, François Schue
  • Publication number: 20100312340
    Abstract: The present invention relates to specific DL-lactide-?-caprolactone copolymers and the application of these polymers in the production of biodegradable medical applications. According to the present invention a polymeric material comprising poly(DL-lactide-co-?-caprolactone) is provided, which is obtained by the copolymerization of DL-lactide and ?-caprolactone, having a lactide content of 51-75 mol %, most preferably of 62-69 mol %. The materials of the present invention have excellent mechanical properties and may be used to provide articles for medical application, in particular nerve guides.
    Type: Application
    Filed: July 22, 2010
    Publication date: December 9, 2010
    Applicant: Polyganics BV
    Inventors: Catharina Everdina Hissink, Theodorus Adrianus C. Flipsen, Hans Wicher Kuijper, Rob Steendam