Polymerizing In The Presence Of A Specified Material Other Than A Reactant Patents (Class 528/355)
  • Patent number: 10426867
    Abstract: A polycaprolactone fumarate polymer useful as a matrix material for a biocompatible scaffold for tissue engineering applications is disclosed. The polycaprolactone fumarate polymer can be prepared by reacting caprolactone with an alkane polyol to prepare a polycaprolactone precursor, and then reacting the polycaprolactone precursor with fumaric acid or a salt thereof to prepare the polycaprolactone fumarate polymer. The use of an alkane diol, such as 1,2-propanediol, provides a linear polycaprolactone diol precursor. The use of an alkane triol, such as glycerol, provides a branched polycaprolactone triol precursor. The biocompatible polycaprolactone fumarate formulation releases no diethylene glycol or other undesirable byproducts during degradation.
    Type: Grant
    Filed: April 4, 2012
    Date of Patent: October 1, 2019
    Assignee: Mayo Foundation for Medical Education and Research
    Inventors: Michael Brett Runge, Michael J. Yaszemski
  • Patent number: 10364319
    Abstract: The invention provides polymers of Formulas I-III, such as polyesters and unsaturated polyesters, and crosslinked and copolymerized polymers thereof. The invention also provides methods to catalytically ring-open five-membered rings such lactones, lactams, and thiolactones, as via ring-opening polymerization. The polymerization products are recyclable and can be depolymerized back to their monomer form via thermolysis and acid or base catalysis.
    Type: Grant
    Filed: April 11, 2016
    Date of Patent: July 30, 2019
    Assignee: Colorado State University Research Foundation
    Inventors: Eugene Y. Chen, Miao Hong, Xiaoyan Tang
  • Patent number: 10144802
    Abstract: Provided herein are methods and systems for producing biodegradable beta-propoiolacone-based polyester polymers from renewable EO and CO on an industrial scale.
    Type: Grant
    Filed: December 5, 2016
    Date of Patent: December 4, 2018
    Assignee: Novomer, Inc.
    Inventor: Sadesh H. Sookraj
  • Patent number: 10065914
    Abstract: The present invention is directed to reactor apparatus and processes for thermolysis of polypropiolactone to produce highly pure acrylic acid. In preferred embodiments of the present invention, the processes comprise introducing a feed stream comprising polypropiolactone to a thermolysis process vessel through an inlet; maintaining a concentration of active salt by adding and removing portions of active salt by at least one inlet and at least one outlet; heating the thermolysis process vessel; and recovering a product including acrylic acid from an outlet. In certain preferred embodiments, the active salt may be present as a catalyst used for polymerization of the polypropiolactone in the feed stream. In some embodiments, one or more active salts may be added to the feed stream and/or the thermolysis process vessel.
    Type: Grant
    Filed: April 24, 2017
    Date of Patent: September 4, 2018
    Assignee: Novomer, Inc.
    Inventors: John Ruhl, Kyle Evan Sherry
  • Patent number: 9546300
    Abstract: A coating composition including a hydrophobic first aliphatic polyisocyanate, a second aliphatic polyisocyanate including a hydrophilic portion, a polyester polyol, a hydrophilic polyol, and a fluorinated polyol compound is disclosed. A coated substrate including a topcoat including the composition is also disclosed. Methods of forming the topcoat on a substrate are also disclosed.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: January 17, 2017
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Alexander Bimanand, Krishna K. Uprety, Khushroo H. Lakdawala
  • Patent number: 9194065
    Abstract: Dimensionally stable nonwoven fibrous webs include a multiplicity of continuous fibers formed from one or more thermoplastic polyesters and polypropylene in an amount greater than 0% and no more than 10% by weight of the web. The webs have at least one dimension which decreases by no greater than 10% in the plane of the web when heated to a temperature above a glass transition temperature of the fibers. A spunbond process may be used to produce substantially continuous fibers that exhibit molecular orientation. A meltblown process may be used to produce discontinuous fibers that do not exhibit molecular orientation. The webs may be used as articles for filtration, sound absorption, thermal insulation, surface cleaning, cellular growth support, drug delivery, personal hygiene, medical apparel, or wound dressing.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: November 24, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: Eric M. Moore, John D. Stelter, Michael R. Berrigan, Francis E. Porbeni, Matthew T. Scholz, Sian F. Fennessey, Jay M. Jennen, Kevin D. Landgrebe, Korey W. Karis
  • Patent number: 9040653
    Abstract: This disclosure provides methods of controlled polymerization of cyclic compounds catalyzed by carbene derivatives having a general formula as shown below, and to obtain a biodegradable polymeric material having a large molecular weight, a narrow dispersity, and no metallic impurity.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: May 26, 2015
    Assignee: NANJING UNIVERSITY OF TECHNOLOGY
    Inventors: Zhenjiang Li, Pingkai Ouyang, He Huang
  • Patent number: 9029497
    Abstract: This disclosure provides a method of making polylactic acid using carbon dioxide adducts of carbenes, wherein the adducts of carbenes have a structure represented by formula (I) as follows:
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: May 12, 2015
    Assignee: Nanjing University of Technology
    Inventors: Zhenjiang Li, Pingkai Ouyang, He Huang
  • Publication number: 20150011724
    Abstract: A method for producing a polymer, including: (i) bringing a compressive fluid and raw materials containing a ring-opening polymerizable monomer into contact with each other at a mixing ratio represented by the following formula, to thereby allow the ring-opening polymerizable monomer to carry out ring-opening polymerization: 1>{Mass of the raw materials/(Mass of the raw materials+Mass of the compressive fluid)}?0.5.
    Type: Application
    Filed: January 25, 2013
    Publication date: January 8, 2015
    Inventors: Taichi Nemoto, Chiaki Tanaka
  • Patent number: 8912259
    Abstract: The present disclosure provides a halogen-free thermosetting composition including a benzoxazine compound, a monobenzoxazine monomer, and a naphthalene epoxy. The halogen-free thermosetting composition is especially suited for use in aerospace, automobile, rail and marine applications.
    Type: Grant
    Filed: August 11, 2011
    Date of Patent: December 16, 2014
    Assignee: Huntsman Advanced Materials Americas LLC
    Inventor: James Hoge
  • Patent number: 8846810
    Abstract: A method for producing polymer particles, including (A) polymerizing and granulating a ring-opening polymerizable monomer in a compressive fluid with a catalyst in the presence of a surfactant, or (B) polymerizing and granulating an addition polymerizable monomer in a compressive fluid in the presence of a silicone surfactant.
    Type: Grant
    Filed: March 4, 2011
    Date of Patent: September 30, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Nobuyuki Mase, Takeshi Sako, Idzumi Okajima, Shunsuke Mori, Keishi Mizuno, Yoshitaka Yamauchi, Taichi Nemoto, Chiaki Tanaka, Satoyuki Sekiguchi, Jyun Ishiduka
  • 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
  • Publication number: 20140200326
    Abstract: 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.
    Type: Application
    Filed: August 6, 2012
    Publication date: July 17, 2014
    Inventors: Yoshitaka Yamauchi, Chiaki Tanaka, Taichi Nemoto, Kazumi Suzuki, Keiko Osaka, Shinichi Wakamatsu, Satomi Sabu
  • Publication number: 20140179893
    Abstract: 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).
    Type: Application
    Filed: July 6, 2012
    Publication date: June 26, 2014
    Applicants: FONDAZIONE CARIPLO, UNIVERSITA' DEGLI STUDIO DI MILANO
    Inventors: Giuseppe Di Silvestro, Cuiming Yuan, Marco Ortenzi, Tommaso Lugato, Luca Basilissi
  • Publication number: 20140163194
    Abstract: To provide a method for producing a polymer, which contains: bringing a compressive fluid and a ring-opening polymerizable monomer into contact with each other, followed by adding a catalyst thereto, to thereby allow the ring-opening polymerizable monomer to carry out ring-opening polymerization.
    Type: Application
    Filed: July 27, 2012
    Publication date: June 12, 2014
    Inventors: Taichi Nemoto, Chiaki Tanaka, Yoshitaka Yamauchi
  • Patent number: 8691912
    Abstract: 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.
    Type: Grant
    Filed: February 17, 2010
    Date of Patent: April 8, 2014
    Assignee: Kureha Corporation
    Inventors: Yoshinori Suzuki, Fumio Maeda, Takahiro Watanabe, Hiroyuki Sato
  • Patent number: 8642717
    Abstract: The present invention is an aliphatic polyester resin in which a polyhydroxy acid skeleton is a main component, manufactured using a polymerization catalyst, characterized in that a specific organophosphorus compound is copolymerized in the resin. Activity of the polymerization catalyst contained in the aliphatic polyester resin of the present invention after the polymerization is well lowered and a lactide is hardly produced even by heating after the polymerization or after the manufacture.
    Type: Grant
    Filed: October 4, 2012
    Date of Patent: February 4, 2014
    Assignee: Toyo Boseki Kabushiki Kaisha
    Inventors: Tomokazu Kusunoki, Toshifumi Unrinin, Osamu Morimoto
  • Publication number: 20140011972
    Abstract: Provided herein are novel processes for synthesis of polymers and/or polymer composites.
    Type: Application
    Filed: February 7, 2012
    Publication date: January 9, 2014
    Applicant: GRAPHEA, INC.
    Inventors: Christopher W. Bielawski, Daniel R. Dreyer
  • 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
  • Publication number: 20130236499
    Abstract: Novel semi-crystalline, segmented copolymers of lactide and epsilon-caprolactone exhibiting long term absorption characteristics are disclosed. The novel polymer compositions are useful for long term absorbable meshes, surgical sutures, especially monofilament sutures, and other medical devices.
    Type: Application
    Filed: March 12, 2012
    Publication date: September 12, 2013
    Inventors: Sasa Andjelic, Dennis D. Jamiolkowski
  • Publication number: 20110319588
    Abstract: 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.
    Type: Application
    Filed: January 15, 2010
    Publication date: December 29, 2011
    Applicant: FUTEERRO S.A.
    Inventors: Thierry Coupin, Philippe Coszach, Delphine Hottois
  • 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
  • Publication number: 20110218301
    Abstract: A method for producing a polymer, including polymerizing a ring-opening polymerizable monomer in a compressive fluid with a metal-free organic catalyst to produce a polymer.
    Type: Application
    Filed: March 8, 2011
    Publication date: September 8, 2011
    Inventors: Taichi NEMOTO, Nobuyuki Mase, Takeshi Sako, Idzumi Okajima, Shunsuke Mori, Chiaki Tanaka, Yoshitaka Yamauchi, Jyun Ishiduka
  • Patent number: 7999061
    Abstract: A catalytic lactide and glycolide copolymerization system comprising a trifluoromethane sulfonate as a catalyst and copolymerization additive and a copolymerization process.
    Type: Grant
    Filed: December 11, 2008
    Date of Patent: August 16, 2011
    Assignee: IPSEN Pharma S.A.S.
    Inventors: Blanca Martin-Vaca, Anca Dumitrescu, Lidija Vranicar, Jean-Bernard Cazaux, Didier Bourissou, Roland Cherif-Cheikh, Frédéric Lacombe
  • Patent number: 7964211
    Abstract: The present invention is directed to absorbable microspheres comprising a copolymer formed from greater than 88 to about 99 mole percent ?-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.
    Type: Grant
    Filed: June 3, 2010
    Date of Patent: June 21, 2011
    Assignee: Ethicon, Inc.
    Inventors: Modesto Erneta, Zhangwen Wu
  • Patent number: 7893190
    Abstract: Disclosed herein are an alternating copolymer of phenylene vinylene and oligoarylene vinylene, a preparation method thereof, and an organic thin film transistor including the same. The organic thin film transistor maintains low off-state leakage current and realizes a high on/off current ratio and high charge mobility because the organic active layer thereof is formed of an alternating copolymer of phenylene vinylene and oligoarylene vinylene.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: February 22, 2011
    Assignee: Samsung Electronics Co., Inc.
    Inventors: Jeong Il Park, Kook Min Han, Sang Yoon Lee, Eun Jeong Jeong
  • Publication number: 20100240859
    Abstract: The present invention is directed to absorbable microspheres comprising a copolymer formed from greater than 88 to about 99 mole percent ?-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.
    Type: Application
    Filed: June 3, 2010
    Publication date: September 23, 2010
    Inventors: Modesto Erneta, Zhangwen Wu
  • Patent number: 7714097
    Abstract: A synthetic route is provided to prepare poly(?-hydroxycarboxylic acid) polymers via the ring-opening polymerization of ?-hydroxycarboxylic acid cyclic oligomers. The cyclic oligomers can be prepared directly from biorenewable sources, such as 3-hydroxypropionic acid. The method can be used to prepare high molecular weight polymers from the cyclic oligomers. Good molecular weight control can be obtained for both solution state and melt polymerizations.
    Type: Grant
    Filed: October 6, 2006
    Date of Patent: May 11, 2010
    Assignee: Regents of the University of Minnesota
    Inventors: Donghui Zhang, William B. Tolman, Marc A. Hillmyer
  • Publication number: 20090306333
    Abstract: 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: and stereoisomers thereof. The lactide monomer derivative is bifunctional in that either 1) the norbornene ring, 2) lactide ring, or 3) both, can be opened and used in polymer synthesis for the backbone or the reactive branch for other polymeric syntheses.
    Type: Application
    Filed: June 8, 2009
    Publication date: December 10, 2009
    Applicant: Regents of the University of Minnesota
    Inventors: Feng Jing, Marc Hillmyer
  • Patent number: 7622547
    Abstract: A lactone compound represented by following General Formula (1), such as ?-caprolactone, is reacted in the presence of a powdered activated carbon where necessary with an initiator such as a polyhydric alcohol, an aliphatic alcohol, or an aliphatic carboxylic acid to thereby yield, for example, a polylactone, a polylactone alkyl ether, or a polylactone alkyl ester. [Chemical Formula 1] Wherein R1 is an alkylene group having two to eighteen carbon atoms which may be substituted with one or more alkyl groups each having one to ten carbon atoms. Accordingly, a target compound can be produced in a high yield with high quality, from which the catalyst can be easily removed.
    Type: Grant
    Filed: February 3, 2006
    Date of Patent: November 24, 2009
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Toshio Endo, Hidetoshi Omori
  • Patent number: 7622546
    Abstract: A process for producing an aliphatic polyester by subjecting a cyclic ester to ring-opening polymerization, which comprises adding water to a cyclic ester purified to the extent that a water content is at most 60 ppm to control an overall proton concentration in the cyclic ester, thereby controlling at least one physical property among melt viscosity, molecular weight and yellowness index of the resulting aliphatic polyester.
    Type: Grant
    Filed: October 8, 2003
    Date of Patent: November 24, 2009
    Assignee: Kureha Corporation
    Inventors: Hiroyuki Sato, Tomohiro Hoshi, Yasushi Okada, Yoshinori Suzuki
  • Publication number: 20090286927
    Abstract: The present invention is directed to a process for preparing a hyperbranched polymer having a weight-average molar mass of at least 30,000, comprising coupling a first prepolymer having at least three functional end groups with a second prepolymer having at least two functional end groups by a dehydration condensation reaction between the end groups in the prepolymers. According to the present invention the number of arms and/or molar mass of the functionalized prepolymers can accurately be adjusted, thus affecting the properties of the resulting hyperbranched polymer in a desired way. Thus the polymer can be equipped e.g. with hydrophobic and hydrophilic parts. Also, the number of functional end groups, that optionally can be used for further chemical reactions, in the hyperbranched polymer can easily be adjusted to a desired level.
    Type: Application
    Filed: June 8, 2009
    Publication date: November 19, 2009
    Inventors: Niels Dan Anders Sodergard, Erik Mikael Stolt
  • Publication number: 20090176963
    Abstract: 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.
    Type: Application
    Filed: June 12, 2007
    Publication date: July 9, 2009
    Inventors: Atsushi Abiko, Hisako Iwahashi
  • Publication number: 20090138041
    Abstract: Halogenated cyclic lactones, polymers made from halogenated cyclic lactones and compositions containing such polymers provide antimicrobial properties and are suitable for use in making textiles, medical devices, delivery agents, packaging materials, coatings for such items, and the like.
    Type: Application
    Filed: May 14, 2007
    Publication date: May 28, 2009
    Inventors: Joshua B. Stopek, Joseph Hotter, Steve Tsai
  • Publication number: 20090124535
    Abstract: Disclosed are terpolymer compositions of lactide, glycolide, and caprolactone and methods of making such polymers with an initiator. Methods of using the terpolymers as a drug delivery platform are also disclosed.
    Type: Application
    Filed: November 12, 2008
    Publication date: May 14, 2009
    Inventors: Peter Markland, Howard Bowman
  • Publication number: 20090124787
    Abstract: The invention relates to a process for preparing polyhydroxyalkanoates by polymerization of lactones of the general formula I, where the substituents and the index n have the meanings given in the description, in the presence of at least one catalyst of the formula (II) LIMaXam, where the substituents and indices have the meanings given in the description. The invention further relates to poly-3-hydroxybutyrates which have a novel property profile and are obtainable for the first time by means of this process, and also biodegradable polyester mixtures based on these poly-3-hydroxybutyrates.
    Type: Application
    Filed: April 11, 2006
    Publication date: May 14, 2009
    Inventors: Peter Preishuber-Pflugl, Ferenc Molnar
  • Publication number: 20080132667
    Abstract: A polyimide resin is produced by the reaction of a compound selected from 1,2,4,5-cyclohexanetetracarboxylic acid, dianhydride thereof and reactive derivatives thereof and a compound selected from diamines and diisocyanates each containing at least one phenylene group and at least one isopropylidene group. The polyimide resin is colorless and exhibits a high heat resistance, a high transparency and a low water absorption.
    Type: Application
    Filed: December 19, 2005
    Publication date: June 5, 2008
    Inventors: Takashi Makinoshima, Shuta Kihara
  • Publication number: 20080125568
    Abstract: A lactone compound represented by following General Formula (1), such as ?-caprolactone, is reacted in the presence of a powdered activated carbon where necessary with an initiator such as a polyhydric alcohol, an aliphatic alcohol, or an aliphatic carboxylic acid to thereby yield, for example, a polylactone, a polylactone alkyl ether, or a polylactone alkyl ester. [Chemical Formula 1] Wherein R1 is an alkylene group having two to eighteen carbon atoms which may be substituted with one or more alkyl groups each having one to ten carbon atoms. Accordingly, a target compound can be produced in a high yield with high quality, from which the catalyst can be easily removed.
    Type: Application
    Filed: February 3, 2006
    Publication date: May 29, 2008
    Inventors: Toshio Endo, Hidetoshi Omori
  • Patent number: 7342086
    Abstract: An aliphatic polyester polyether copolymer is provided having an aliphatic polyester moiety comprising 35 to 50 molar % of an aliphatic diol unit, 35 to 50 molar % of an aliphatic dicarboxylic acid unit and 0 to 30 molar % of an aliphatic oxycarboxylic acid unit and a polyether moiety, wherein ?sp/C is not less than 1.40 and the ratio by weight of the polyether moiety to the aliphatic polyester polyether copolymer is 0.1 to 90% by weight.
    Type: Grant
    Filed: January 3, 2005
    Date of Patent: March 11, 2008
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Satoshi Kato, Rie Shirahama, Atsushi Kusuno, Kazunori Yano, Yuuko Motegi
  • Publication number: 20070232773
    Abstract: A cyclic ester (e.g., a lactone such as ?-caprolactone) is ring-opening addition polymerized with a dihydroxycarboxylic acid in the presence of a basic compound (e.g., an amine). In a polyester polyol obtained by such a process, at least part of a carboxyl group of the polyester polyol forms a carboxylate with the basic compound, and the content of the dihydroxycarboxylic acid in a free form can be remarkably reduced (for example, reduced to not more than 5% by weight relative to the total polyester polyol). According to the present invention, a polyester polyol having a reduced content of a free or unreacted dihydroxycarboxylic acid is provided even in the case of using a dihydroxycarboxylic acid (e.g., a dimethylolalkanoic acid such as dimethylolpropionic acid) as an initiator.
    Type: Application
    Filed: March 23, 2007
    Publication date: October 4, 2007
    Inventors: Toshio Endo, Hidetoshi Omori, Tatsumi Fujii
  • Patent number: 7247261
    Abstract: The present invention relates to a non-linear optical material having a dendrimer structure; and, more particularly, to a non-linear optical material having organic chromophores at the ends and formed based on ester linkages and/or ether linkages. Since the non-linear optical material of the present invention is formed based on ester linkages and/or ether linkages, it is very stable. Also, because it is a dendrimer structure, it has the properties of a polymer while having a strong connection ability at the ends, and this makes the non-linear optical material easily adopt organic chromophores easily. As it is stable thermally and optically, it can be applied to optical communication usefully.
    Type: Grant
    Filed: October 30, 2003
    Date of Patent: July 24, 2007
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jung Yun Do, Seung Koo Park, Jung Jin Ju, Suntak Park, Min-su Kim, Myung Hyun Lee
  • Patent number: 7217770
    Abstract: A biocompatible stable composition containing a hydrophobic drug, such as paclitaxel. The composition, which forms a syringeable polymeric micellar solution in aqueous or body fluids, is a freeze-dried product comprising a hydrophobic drug, i.e. paclitaxel, and an amphiphilic block copolymer wherein a hydrophobic group having affinity or attraction with the hydrophobic drug, such as paclitaxel, is incorporated on its end.
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: May 15, 2007
    Assignee: Samyang Corporation
    Inventors: Min-Hyo Seo, Yil-Woong Yi, Jae-Won Yu
  • Patent number: 7175917
    Abstract: The present invention provides a biaxially oriented film of a polylactic acid resin that is suitable for films for bags and packaging films for various windows, particularly films for outlook window envelopes. The film is biodegradable and, as films for outlook window envelopes, is superior in the coating adaptability for an antistatic agent, a lubricant and an antiblocking agent or the like and in the high-speed cutting property. The present invention discloses a biaxially oriented film of a polylactic acid resin comprising not less than 50% by weight of a polylactic acid resin, which has a storage modulus E?at 80° C. within the range from 10 MPa to 3,000 MPa, as determined by the test method for temperature dependency of dynamic viscoelasticity, in accordance with JIS K7198 (method A); a heat shrinkage of not higher than 10%, upon heating at 80° C. for 10 seconds; and a tear strength in the width direction (TD direction) of the film of 10 to 200 mN, as determined in accordance with JIS K7128 (method B).
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: February 13, 2007
    Assignee: Asahi Kasei Life & Living Corporation
    Inventors: Masayuki Sukigara, Mitsuyoshi Itada, Hisao Koike, Michihiro Yatsuzuka, Yoshiaki Hamada
  • Patent number: 7153523
    Abstract: A biologically absorbable polyhydroxycarboxylic acid in which a content of water-soluble acid components is not more than 0.07 mol/kg in terms of monobasic acids, and which has a weight average molecular weight of 4,000 to 100,000 and contains neither a catalyst nor an organic solvent, and a production method thereof.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: December 26, 2006
    Assignee: Mitsui Chemicals, Inc.
    Inventors: Kazuhiko Yoshinaga, Hideyuki Akieda
  • Patent number: 7151155
    Abstract: Disclosed are copolymers of cyclic esters, e.g., caprolactone, and cyclic formals of substituted or unsubstituted diols, e.g., 1,3-dioxepane. The copolymers can provide a low melting temperature rendering them liquids at room temperature. Elastomeric polyurethanes prepared from such copolymers can exhibit a low Tg transition and good resistance to hydrolysis and oxidation. The copolymers are particularly useful for elastomers, coatings, adhesives, inks or binders requiring low temperature flexibility and good resistance to hydrolysis and oxidation.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: December 19, 2006
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Thomas A. Upshaw, Angelo Mellozzi
  • Patent number: 7148315
    Abstract: Monomer addition methodology is provided to adjust monomer addition rates to a polymerization reactor. Advantages of the invention include control of bioabsorbable copolymer structure, improvement of monomer conversion, control of reaction temperature, and reduced reaction time. The overall result is an improved process and enhanced product performance. The technology is particularly useful in the copolymerization of monomers with different reactivity ratios, such as glycolide/lactide copolymers and glycolide/caprolactone copolymers. Monomer reactivity ratios and reaction kinetics are utilized to adjust monomer addition rates.
    Type: Grant
    Filed: October 23, 2002
    Date of Patent: December 12, 2006
    Assignee: Ethicon, Inc.
    Inventors: Modesto Erneta, Terry E. Lawler
  • Patent number: 7144976
    Abstract: The present invention includes photocurable, liquid polymers incorporating coumarin ester endgroups into their molecular structure, which polymers are crosslinked upon irradiation with ultraviolet light by photochemically allowed [2+2] cycloaddition reactions among the chain ends, and which crosslinked polymers are useful in the preparation of medical devices, tissue engineering scaffolds, drug delivery systems and, in particular, in vivo preparation of implants in an open surgical procedure or laproscopically.
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: December 5, 2006
    Assignee: Ethicon, Inc.
    Inventors: Takehisa Matsuda, Manabu Mizutani, Steven Arnold
  • Patent number: 7141643
    Abstract: A block copolymer is disclosed, which comprises a first block comprising polymerized units of an alkylene oxide and a second block comprising polymerized units of an alkylene oxide and a lactone, said copolymer being obtainable by polymerizing an alkylene oxide in the presence of an organic initiator to form said first block, and reacting the first block with a mixture of an alkylene oxide and a lactone. Such copolymers are found to have improved foam inhibition characteristics while maintaining their biodegradable properties.
    Type: Grant
    Filed: November 28, 2001
    Date of Patent: November 28, 2006
    Assignee: Cognis Performance Chemicals UK Ltd.
    Inventors: Elizabeth Dixon, John Robert Moxey
  • Patent number: 7138179
    Abstract: Disclosed is a method for preparing a biodegradable polymer in the form of uniform powder or spherical particles by dispersion polymerization without a grinding step. The method for preparing a biodegradable polyester includes dispersing a monomer in the presence of a catalyst in a dispersion solvent to form a solid or liquid phase for dispersion polymerization and thereby to yield a biodegradable aliphatic polyester in the form of spherical particles or powder, the monomer comprising a mixture of a first compound (e.g., lactide or glycolide) and a second compound being selected from the group consisting of polyhydric alcohols (e.g., glycerin, erythritol, penterythritol or dipentaerythritol) and carprolactone. The present invention readily prepares a biodegradable polymer having a high molecular weight in the form of uniform powder or spherical particles.
    Type: Grant
    Filed: February 20, 2002
    Date of Patent: November 21, 2006
    Assignee: Chemical & Medical Research Co., Ltd.
    Inventors: Kyeong Ah Kim, Byung Kun Son, Yong Gun Jeon
  • Patent number: 7129319
    Abstract: An absorbable crystalline, monocentric polyaxial copolymer comprising a central carbon or nitrogen atom and at least three axes, each of which includes an amorphous flexible component adjacent and originating from the central atom and a rigid, crystallizable component extending outwardly from the amorphous, flexible component is disclosed along with the use of such copolymer in medical devices which may contain a bioactive agent. The present invention also relates to a suture, stents, stent mantles and sealing devices made from the polyaxial copolymer.
    Type: Grant
    Filed: July 30, 2003
    Date of Patent: October 31, 2006
    Assignee: Poly Med Inc.
    Inventor: Shalaby W. Shalaby