Ether-esters Patents (Class 536/66)
  • Patent number: 10202469
    Abstract: To provide a carrier linker that is capable of improving the water solubility of a physiologically active substance and more quickly releasing the physiologically active substance under specific conditions without utilizing light or enzymatic cleavage. [Solution] A novel sugar chain-attached linker comprising a sugar chain that is attached as a carrier.
    Type: Grant
    Filed: November 21, 2013
    Date of Patent: February 12, 2019
    Assignee: Glytech, Inc.
    Inventors: Hirofumi Ochiai, Kenta Yoshida
  • Patent number: 9587037
    Abstract: A process for recovering an esterified cellulose ether from a reaction product mixture obtained from a reaction of (a) a cellulose ether with (b) an aliphatic monocarboxylic acid anhydride or a di- or tricarboxylic acid anhydride or a combination of an aliphatic monocarboxylic acid anhydride and a di- or tricarboxylic acid anhydride, comprises the steps of (i) contacting the reaction product mixture with an aqueous liquid to precipitate the esterified cellulose ether from the reaction product mixture, (ii) isolating the precipitated esterified cellulose ether from the mixture obtained in step (i), and (iii) suspending the isolated esterified cellulose ether in an aqueous liquid to provide a suspension having a temperature of at least 28° C., and (iv) recovering the esterified cellulose ether from the suspension of step (iii).
    Type: Grant
    Filed: September 15, 2014
    Date of Patent: March 7, 2017
    Inventors: Oliver Petermann, Matthias Sprehe, Robert Appell, Robert Nilsson
  • Patent number: 9074020
    Abstract: A cellulose derivative, contains A) a hydrocarbon group; B) a group containing an acyl group: —CO—RB and an ethyleneoxy group: —C2H4—O— (RB represents a hydrocarbon group); and C) an acyl group: —CO—RC (RC represents a hydrocarbon group). A method for preparing the cellulose derivative, a resin composition containing the cellulose derivative, a case for an electric and electronic device and a method for preparing a molded body are also provided.
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: July 7, 2015
    Assignee: FUJIFILM CORPORATION
    Inventors: Shigeki Uehira, Youichirou Takeshima
  • Patent number: 9074021
    Abstract: A thermo-molding material contains a water-insoluble cellulose derivative, wherein the water-insoluble cellulose derivative comprises: A) a hydrocarbon group; B) a group containing an acyl group: —CO—RB1 and an alkyleneoxy group: —RB2—O— (RB1 represents a hydrocarbon group, and RB2 represents an alkylene group having 3 carbon atoms); and C) an acyl group: —CO—RC (RC represents a hydrocarbon group).
    Type: Grant
    Filed: August 11, 2010
    Date of Patent: July 7, 2015
    Assignee: FUJIFILM CORPORATION
    Inventors: Shigeki Uehira, Youichirou Takeshima
  • Patent number: 8992731
    Abstract: An object of the invention is to provide cellulose fibers which can give a cellulose composite that renders high transparency, a reduction in linear expansion coefficient, and a high modulus of elasticity possible. The invention relates to: a process for producing modified cellulose fibers which includes a modification reaction step of reacting cellulose with an aromatic compound in an organic acid to thereby modify the cellulose with an aromatic-ring-containing substituent; cellulose fibers modified with aromatic-ring-containing substituent; a dispersion of the cellulose fibers; and a cellulose fiber composite obtained from the same.
    Type: Grant
    Filed: December 12, 2011
    Date of Patent: March 31, 2015
    Assignee: Mitsubishi Chemical Corporation
    Inventor: Hideko Akai
  • Publication number: 20150065547
    Abstract: An esterified cellulose ether comprises (i) aliphatic monovalent acyl groups or (ii) groups of the formula —C(O)—R—COOA wherein R is a divalent aliphatic or aromatic hydrocarbon group and A is hydrogen or a cation or (iii) a combination of aliphatic monovalent acyl groups and groups of the formula —C(O)—R—COOA, wherein the cellulose ether has anhydroglucose units joined by 1-4 linkages and has methyl groups, hydroxyalkyl groups, and optionally alkyl groups being different from methyl as substituents such that the esterified cellulose ether has an MS (hydroxyalkyl) of 0.05 to 1.00, and hydroxyl groups of anhydroglucose units are substituted with methyl groups such that [s23/s26?0.2*MS(hydroxyalkyl)] is 0.
    Type: Application
    Filed: October 24, 2012
    Publication date: March 5, 2015
    Applicant: Dow Global Technologies LLC
    Inventors: Robert L. Schmitt, Robert L. Sammler, Meinolf Brackhagen, Oliver Petermann, Roland Adden, Nicholas S. Grasman, Steven J. Guillaudeu
  • Publication number: 20140343272
    Abstract: Disclosed are a method of preparing acetylated cellulose ether, and acetylated cellulose ether prepared thereby. Here, the disclosed method of preparing the acetylated cellulose ether includes dissolving acetylated cellulose ether in an organic solvent to obtain a mixture comprising a solution of the acetylated cellulose ether; removing an insoluble component that is insoluble in the organic solvent from the mixture; and adding the mixture to water to precipitate the acetylated cellulose ether. The acetylated cellulose ether prepared thereby has a turbidity of less than 40 formazin turbidity units (FTU).
    Type: Application
    Filed: November 16, 2012
    Publication date: November 20, 2014
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD.
    Inventors: Min Ju SONG, Byoung Hee SON
  • Publication number: 20140332708
    Abstract: Disclosed are acetylated cellulose ether, a method of preparing the same, and an article including the same. The disclosed acetylated cellulose ether has a degree of substitution (DS) of alkyl group of 1 to 2, a molar substitution (MS) of hydroxyalkyl group of 0 to 1, and a degree of substitution (DS) of acetyl group of 1 to 2; and a bulk density of 0.1 to 0.4.
    Type: Application
    Filed: November 16, 2012
    Publication date: November 13, 2014
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD.
    Inventors: Byoung Hee Son, Tae Hong Kim, Il Yong Lee
  • Publication number: 20140154756
    Abstract: Processes disclosed are capable of converting biomass into high-crystallinity nanocellulose with surprisingly low mechanical energy input. In some variations, the process includes fractionating biomass with an acid (such as sulfur dioxide), a solvent (such as ethanol), and water, to generate cellulose-rich solids and a liquid containing hemicellulose and lignin; and mechanically treating the cellulose-rich solids to form nanofibrils and/or nanocrystals. The total mechanical energy may be less than 500 kilowatt-hours per ton. The crystallinity of the nanocellulose material may be 80% or higher, translating into good reinforcing properties for composites. The nanocellulose material may include nanofibrillated cellulose, nanocrystalline cellulose, or both. In some embodiments, the nanocellulose material is hydrophobic via deposition of some lignin onto the cellulose surface.
    Type: Application
    Filed: November 27, 2013
    Publication date: June 5, 2014
    Applicant: API Intellectual Property Holdings, LLC
    Inventors: Kimberly NELSON, Theodora RETSINA, Vesa PYLKKANEN, Ryan O'CONNOR
  • Publication number: 20130245248
    Abstract: Provided are acetylated cellulose ether and an article including the same. The acetylated cellulose ether has a molecular weight of about 1,000 to about 1,000,000 Daltons, a contact angle of about 20 to about 45 degrees (°), and a tensile strength of about 50 to about 100 MPa.
    Type: Application
    Filed: March 9, 2011
    Publication date: September 19, 2013
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD.
    Inventors: Gyung Don Kang, Jin Kyu Kang, Hyun Young Park, Min Ju Song
  • Patent number: 8461234
    Abstract: A refinish coating composition is provided comprising: a) at least one refinish coating resin; b) at least one solvent; c) at least one pigment; d) optionally, at least one crosslinking agent; e) at least one cellulose mixed ester having a weight average molecular weight (Mw) greater than 10,000 and f) at least one low molecular weight cellulose mixed ester. In addition, processes for coating the refinish coating composition on a substrate are also provided.
    Type: Grant
    Filed: March 22, 2010
    Date of Patent: June 11, 2013
    Assignee: Eastman Chemical Company
    Inventors: Deepanjan Bhattacharya, Roy Glenn Foulk, Hampton Loyd Chip Williams, III, Michael Charles Shelton, Jessica Dee Posey-Dowty, Daniel Wayne Dixon, Jr., Paul Lee Lucas, Alan Kent Wilson, Kenneth Raymond Walker, Jonathan Edward Lawniczak, Hieu Duy Phan, Charlie Carroll Freeman, Jr., Lisa Perdomo
  • Publication number: 20130079504
    Abstract: A mixture of a raw material poorly water-soluble polysaccharide or derivative thereof in an ionic liquid-containing solvent is exposed to radiation. Accordingly, a polysaccharide gel producing process is provided that can produce a gel without performing a special pretreatment for the raw material.
    Type: Application
    Filed: September 25, 2012
    Publication date: March 28, 2013
    Applicant: JAPAN ATOMIC ENERGY AGENCY
    Inventor: JAPAN ATOMIC ENERGY AGENCY
  • Publication number: 20120296078
    Abstract: Acetylated cellulose ether and an article including the same. The acetylated cellulose ether has a degree of substitution (DS) of alkyl group of 1 to 2, a molar substitution (MS) of hydroxyalkyl group of 0 to 1, and a degree of substitution (DS) of acetyl group of 1 to 2.
    Type: Application
    Filed: October 11, 2010
    Publication date: November 22, 2012
    Applicant: SAMSUNG FINE CHEMICALS CO., LTD.
    Inventors: Gyung Don Kang, Hyun Young Park, Jin Kyu Kang
  • Publication number: 20120261321
    Abstract: Example embodiments relate to a separation membrane including at least one polymer including a structural unit represented by the following Chemical Formula 1, Chemical Formula 1 may be as described in the detailed description. Example embodiments also relate to a forward osmosis device including the separation membrane, methods of preparing the polymer of the separation membrane, and methods of manufacturing the separation membrane.
    Type: Application
    Filed: April 17, 2012
    Publication date: October 18, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Jung Im Han, Sung Soo Han, Hyo Kang
  • Publication number: 20120238524
    Abstract: The invention relates to modified polysaccharide ethers having a weight-averaged molecular weight of 40000 to 50000 g/mole, zero shear viscosity of more than 10 Pas, and pseudoplasticity of more than 20, obtainable by reacting cellulose-based polysaccharide ether(s) with at least one mesogenic modification agent or modified polysaccharide ethers, obtainable by reacting polysaccharide ether(s) selected from the group consisting of hydroxypropylmethyl cellulose (HPMC), hydroxyethylmethyl cellulose (HEMC), methyl cellulose, and cellulose ethers with methyl and/or ethyl and/or propyl groups and mixtures thereof, with at least one mesogenic modification agent. Said substances can be used to produce gel-like to stable aqueous preparations having viscoelastic flow properties, which are suited for use in the human body, particularly within the scope of ophthalmologic procedures.
    Type: Application
    Filed: August 17, 2010
    Publication date: September 20, 2012
    Applicant: PHARMPUR GMBH
    Inventors: Helmut Ritter, Bernd Mueller, Dirk-Henning Menz
  • Publication number: 20110301525
    Abstract: This invention relates to biomaterial compositions, methods and kits for producing hydrogels with tunable physico-chemical properties. Specifically, the invention relates to producing cellulosic hydrogels having optimized physico-chemical properties enabling support of cell growth or as replacement or filler for tissue repair, reconstruction or augmentation.
    Type: Application
    Filed: November 12, 2009
    Publication date: December 8, 2011
    Inventors: Steven B. Nicoll, Simone S. Stalling, Anna T. Reza
  • Patent number: 8026357
    Abstract: A cellulose acylate film, comprising a cellulose acylate having at least one substituent (Substituent A) comprising an aromatic group having at least one C4 or longer aliphatic group, is disclosed.
    Type: Grant
    Filed: October 29, 2008
    Date of Patent: September 27, 2011
    Assignee: FUJIFILM Corporation
    Inventors: Tomoko Kuwabara, Kunihiro Atsumi
  • Publication number: 20110183090
    Abstract: A cellulose derivative and a resin composition having good thermoplasticity, strength, and elongation at break and therefore suited to molding processing are provided. The cellulose derivative is derived by replacing at least part of the hydrogen atoms of the hydroxyl groups of cellulose with a hydrocarbon group and an aliphatic or aromatic oxycarbonyl group.
    Type: Application
    Filed: September 28, 2009
    Publication date: July 28, 2011
    Applicant: FUJIFILM CORPORATION
    Inventors: Yutaka Nozoe, Toshihide Yoshitani
  • Publication number: 20110003936
    Abstract: Disclosed are soil additives capable of hydrophilizing soil particles and/or increase available water capacity in soil. The soil additive are capable of increasing the available water content/capacity (AWC) in soils, the additive in one embodiment comprising a polymer composition having a hydrophilic portion and a hydrophobic portion, wherein the hydrophobic portion of the copolymer binds with the soil particle surface and the hydrophilic portion of the copolymer can bind with water. This results in the prevention, arrest or decelerated loss of water from the targeted area, for example the plant root zone, which allows for improved water usage efficiency by plants, grasses, vegetation, etc.
    Type: Application
    Filed: July 2, 2010
    Publication date: January 6, 2011
    Applicant: Rhodia Operations
    Inventors: Zhiyun Chen, Jean-Christophe Castaing, Marie-Pierre Labeau
  • Patent number: 7109324
    Abstract: A process for chemically bonding an odor-encapsulating agent to textiles includes reacting a cyclodextrin with a cross-linking agent capable of forming ether bonds with the cyclodextrin and with the textile material, and curing the textile material treated with a mixture of the cyclodextrin and cross-linking agent. Preferably, the cross-linking agent is imidazolidone, which forms an ether bond with a hydroxyl group on the cyclodextrin and with a hydroxyl group. In textile materials containing cellulose, imidazolidone forms an ether bond with a hydroxyl group on the cellulose. An active agent can be complexed with the cyclodextrin for release. Textiles formed by such a process can comprise an article of clothing adapted to trap odors emanating from a wearer.
    Type: Grant
    Filed: February 7, 2005
    Date of Patent: September 19, 2006
    Assignee: Dan River, Inc.
    Inventors: Donald Eugene Todd, David Alan Brown
  • Patent number: 7026471
    Abstract: The present invention relates to a purification method of hydroxypropylmethyl cellulose phthalate, more particularly to a method of preparing high-purity hydroxypropylmethyl cellulose phthalate through a simple crushing process which comprises: increasing fluidity of reaction product mixture by adding fluidization solvent as a post-treatment process; and spraying it into water through a spray nozzle. As a result, formation of fine granular hydroxypropylmethyl cellulose phthalate particles prevents inter-particle coagulation during the a post-treatment process, and phthalic anhydride reactant, free phthalic acid and remaining acetic acid solvent can be removed effectively.
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: April 11, 2006
    Assignee: Samsung Fine Chemicals Co., Ltd.
    Inventors: Kyu-Il Cho, Hyon-Ho Baek
  • Patent number: 6861520
    Abstract: A process for chemically bonding an odor-encapsulating agent to textiles includes reacting a cyclodextrin with a cross-linking agent capable of forming ether bonds with the cyclodextrin and with the textile material, and curing the textile material treated with a mixture of the cyclodextrin and cross-linking agent. Preferably, the cross-linking agent is imidazolidone, which forms an ether bond with a hydroxyl group on the cyclodextrin and with a hydroxyl group. In textile materials containing cellulose, imidazolidone forms an ether bond with a hydroxyl group on the cellulose. An active agent can be complexed with the cyclodextrin for release. Textiles formed by such a process can comprise an article of clothing adapted to trap odors emanating from a wearer.
    Type: Grant
    Filed: April 30, 2003
    Date of Patent: March 1, 2005
    Assignee: Dan River, Inc.
    Inventors: Donald Eugene Todd, David Alan Brown
  • Publication number: 20040152886
    Abstract: The present invention relates to a purification method of hydroxypropylmethyl cellulose phthalate, more particularly to a method of preparing high-purity hydroxypropylmethyl cellulose phthalate through a simple crushing process which comprises: increasing fluidity of reaction product mixture by adding fluidization solvent as a post-treatment process; and spraying it into water through a spray nozzle. As a result, formation of fine granular hydroxypropylmethyl cellulose phthalate particles prevents inter-particle coagulation during the a post-treatment process, and phthalic anhydride reactant, free phthalic acid and remaining acetic acid solvent can be removed effectively.
    Type: Application
    Filed: March 23, 2004
    Publication date: August 5, 2004
    Inventors: Kyu-ll Cho, Hyon-Ho Baek
  • Publication number: 20040106786
    Abstract: Disclosed is a process for producing reactive cellulose for use in the manufacture of cellulose acetate having superior clarity by mercerizing hardwood cellulosic material and reacting it with an hydroxyalkylating agent to a degree of molar substitution ranging from 0.04 to 0.15 per anhydroglucose unit in cellulose.
    Type: Application
    Filed: July 8, 2003
    Publication date: June 3, 2004
    Applicant: Rayonier Inc.
    Inventors: Karl D. Sears, Wendy Hendricks
  • Publication number: 20040092455
    Abstract: The present invention provides compositions comprising at least one GHB moiety bonded to at least one physiologically compatible carrier molecule. The compositions can enhance the uptake of the drug, deliver effective therapeutic doses in a time-delayed fashion, or can target specific organs.
    Type: Application
    Filed: November 3, 2003
    Publication date: May 13, 2004
    Inventors: Mortimer Mamelak, William C. Houghton, Dayton T. Reardan, Brian L. Miller
  • Publication number: 20030199687
    Abstract: The present invention relates to fluorinated biopolymer and polymer derivatives useful as imaging probes, diagnostic agents and contrast agents and to imaging methods employing the fluorinated biopolymers and polymers.
    Type: Application
    Filed: April 11, 2003
    Publication date: October 23, 2003
    Inventor: Manssur Yalpani
  • Patent number: 6559300
    Abstract: A water-soluble, biodegradable hydroxyalkyl cellulose-2-hydroxycarboxylic acid ester is disclosed. The hydroxyalkyl cellulose-2-hydroxycarboxylic acid ester has: (i) a molecular degree of substitution of the hydroxyalkyl group of less than 1.5 (MShydroxyalkyl<1.5); and (ii) a molecular degree of substitution of the 2-hydroxycarboxylic acid group of greater than 0.4 and less than 3 (0.4<MS2-hydroxycarboxylic acid<3). Also described is a method of preparing the hydroxyalkyl cellulose-2-hydroxycarboxylic acid ester, and methods of using it, e.g., as a consistency regulator in at least one of foodstuffs, cosmetics, building materials, paints and strippers.
    Type: Grant
    Filed: January 11, 2000
    Date of Patent: May 6, 2003
    Assignee: Wolff Walsrode AG
    Inventors: Joachim Simon, Hanns-Peter Müller, Rainhard Koch, Volkhard Müller, Jürgen Engelhardt, Klaus Szablikowski, Wolfgang Koch
  • Publication number: 20030050472
    Abstract: Disclosed is a process for producing reactive cellulose for use in the manufacture of cellulose acetate having superior clarity by mercerizing hardwood cellulosic material and reacting it with an hydroxyalkylating agent to a degree of molar substitution ranging from 0.04 to 0.15 per anhydroglucose unit in cellulose.
    Type: Application
    Filed: August 31, 2001
    Publication date: March 13, 2003
    Applicant: Rayonier Inc.
    Inventors: Karl D. Sears, Wendy Hendricks
  • Patent number: 6362330
    Abstract: The present invention relates to novel thermoplastic materials based on polysaccharide ethers which are simultaneously substituted by carboxylic acid ester groups and carbamate groups, together with mixtures of such derivatives with low molecular weight aliphatic urea derivatives.
    Type: Grant
    Filed: November 1, 1999
    Date of Patent: March 26, 2002
    Assignee: Wolff Wolsrode AG
    Inventors: Joachim Simon, Hanns-Peter Müller, Dirk Jacques Dijkstra, Gunter Weber
  • Patent number: 6228997
    Abstract: Bacillus subtilis protease catalyzes the acylation of organic solvent-insoluble polysaccharides in isooctane solution containing vinyl esters of fatty acids as acyl donor. The reaction occurs only when the enzyme is solubilized via ion-pairing with the anionic surfactant dioctyl sulfosuccinate, sodium salt (AOT). Enzyme based acylation was demonstrated with amylose, cyclodextrins, cellulose, cellulose derivatives, and other polysaccharides such as chitosan, pullulan, and maltodextrose. These polysaccharides are reactive either as a cryogenically milled powder suspended in the organic solvent or as a thin film deposited onto ZnSe slides. For chitosan, &agr;-cyclodextrin, and hydroxyethyl cellulose (HEC), the enzymatic crosslinking reaction occurs using adipic acid divinyl ester (C6DVE). HEC forms a compound that gels in solvents such as ethyl alcohol and dimethyl sulfone oxide (DMSO).
    Type: Grant
    Filed: July 10, 1998
    Date of Patent: May 8, 2001
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Joseph A. Akkara, David L. Kaplan, Ferdinando F. Bruno, Jonathan S. Dordick
  • Patent number: 6201070
    Abstract: Methods are disclosed for enhancing the toughness, e.g., resistance to cracking upon flexation, of coatings made from cycloaliphatic epoxide derivatives wherein the cycloaliphatic epoxide derivative is a cycloaliphatic epoxide ester of a hydroxy-functional compound containing at least one branched, 1,2-alkylene oxide unit. Processes for making the cycloaliphatic epoxide derivatives and coating formulations comprising the cycloaliphatic epoxide derivatives are also disclosed.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: March 13, 2001
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Naofumi Kumabe, Thomas Andrew Upshaw, Robert Francis Eaton, Bharat Kanaiyalal Patel, John Kellis Braddock
  • Patent number: 6063752
    Abstract: Acylated carbohydrates with at least one carboxyalkyl group etherified with the carbohydrate of the following general formulaKH(--O--CHR.sub.1 --(CH.sub.2).sub.p --(COOH or COO.sup.-)).sub.n (--O--CO--R.sub.2).sub.m,wherein KH (carbohydrate) is a monosaccharide, disaccharide, trisaccharide or polysaccharide, and whereinif KH is a monosaccharide, then n=1 to 4 and m=1 to 4 with n+m=2 to 5;if KH is a disaccharide, then n=1 to 7 and m=1 to 7 with n+m=2 to 8;if KH is a trisaccharide, then n=1 to 10 and m=1 to 10 with n+m=2 to 11; andif KH is a polysaccharide, then n=0.2 to 2.8 and m=0.2 to 2.8 with n+m=0.4 to 3 (with polysaccharide referred to the monosaccharide unit of the KH), and whereinR1 is=H or a moiety with 1-9 carbon atoms, in particular an alkyl or acyl moiety, andR2 is a moiety with 1-9 carbon atoms, in particular an alkyl or acyl moiety, and wherein p=0 to 9.
    Type: Grant
    Filed: June 18, 1997
    Date of Patent: May 16, 2000
    Assignee: Sudzucker Aktiengesellschaft Mannheim/Ochsenfurt
    Inventors: Sonja Ehrhardt, Alireza Haji Begli, Markwart Kunz
  • Patent number: 5994530
    Abstract: The present invention provides certain carboxymethyl cellulose (CMC) esters of higher acids (e.g., CMC acetate propionate, CMC propionate, CMC acetate butyrate, and CMC butyrate)having specific use in aqueous dispersions useful in formulating waterborne coating compositions containing pigments, especially metallic pigments such as aluminum flakes and mica. The esters also have specific use as wetting agents and in high solids coatings.
    Type: Grant
    Filed: June 25, 1998
    Date of Patent: November 30, 1999
    Assignee: Eastman Chemical Corporation
    Inventors: Jessica Dee Posey-Dowty, Alan Kent Wilson, Larry Gerald Curtis, Paul Michael Swan, Kab Sik Seo
  • Patent number: 5861506
    Abstract: Thermoplastic and compostable cellulose ether esters with 2-hydroxycarboxylic acids as acid components and mixed esters which, in addition to 2-hydroxycarboxylic acid groups, have further mono-, dicarboxylic acid or carbamate groups.
    Type: Grant
    Filed: May 7, 1997
    Date of Patent: January 19, 1999
    Assignee: Wolff Walsrode AG
    Inventors: Joachim Simon, Hanns Peter Muller, Rainhard Koch, Dirk Jacques Dijkstra, Jurgen Engelhardt, Volkhard Muller
  • Patent number: 5792856
    Abstract: This invention provides certain carboxymethyl cellulose (CMC) esters of higher acids (e.g., CMC acetate propionate, CMC propionate, CMC acetate butyrate, and CMC butyrate). These new ether derivatives of cellulose esters exhibit solubility in a wide range of organic solvents, compatibility with a variety of resins, and ease of dispersion in a water-borne formulation and are useful in coating compositions as binder resins and rheology modifiers.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: August 11, 1998
    Inventors: John Michael Allen, Alan Kent Wilson, Paul Lee Lucas, Larry Gerald Curtis
  • Patent number: 5717087
    Abstract: The present invention relates to thermoplastic and biodegradable polysaccharide esters/polysaccharide ether esters, which are characterised in that they can be represented by the general structure ##STR1## wherein Polysaccharide-O represents the substituted OH groups of a polymeric saccharide unit and wherein A is a linear polyether chain of the following structureA=(E--O)nwherein E signifies a linear aliphatic or aromatic branched or unbranched chain having 2 to 11 C atoms, n is an integer equal to or greater than 0 and both B and D are a maleic acid addition product of the following structure ##STR2## wherein F is an aliphatic, saturated, monounsaturated or polyunsaturated carbon skeleton, which may optionally be provided with further substituents and wherein C can be a hydrogen atom, one or more substituents from the group dihydroxyethyl, hydroxypropyl, hydroxybutyl, methyl, ethyl, benzyl, dihydroxypropyl, carboxyalkyl, sulphoalkyl or cyanoethyl.
    Type: Grant
    Filed: August 2, 1996
    Date of Patent: February 10, 1998
    Assignee: Wolff Walsrode AG
    Inventors: Jochen Kalbe, Reinhard Koch, Hanns Peter Muller, Jurgen Engelhardt, Wolfgang Koch, Volkhard Muller
  • Patent number: 5668273
    Abstract: This invention provides certain carboxymethyl cellulose (CMC) esters of higher acids (e.g., CMC acetate propionate, CMC propionate, CMC acetate butyrate, and CMC butyrate). These new ether derivatives of cellulose esters exhibit solubility in a wide range of organic solvents, compatibility with a variety of resins, and ease of dispersion in a water-borne formulation and are useful in coating compositions as binder resins and theology modifiers.
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: September 16, 1997
    Assignee: Eastman Chemical Company
    Inventors: John Michael Allen, Alan Kent Wilson, Paul Lee Lucas, Larry Gerald Curtis
  • Patent number: 5612321
    Abstract: Grafted polysaccharide compositions comprising polysaccharides grafted with antioxidants on at least one hydroxyl group of the polysaccharide. The use of antioxidant grafted polysaccharides or antioxidant grafted crosslinked polysaccharides as a treatment for arthritis, as a drug delivery vehicle, to reduce the incidence of post-operative adhesion formation, to promote the healing of chronic wounds and ulcers, and as a component of cosmetic formulations.
    Type: Grant
    Filed: June 22, 1995
    Date of Patent: March 18, 1997
    Assignee: Hercules Incorporated
    Inventor: Tuyen T. Nguyen
  • Patent number: 5488102
    Abstract: Compounds of formulae I and IaR--Y--CO--R.sub.3 --CO--O--A (I),R--Y--CO--R.sub.3 --CO--O--CH.sub.2 --A.sub.1 (Ia),whereinR is a radically polymerisable hydrocarbon group,R.sub.3 is a direct bond, linear or branched C.sub.1 -C.sub.22 alkylene, C.sub.3 -C.sub.8 cycloalkylene or C.sub.6 -C.sub.14 arylene,A is the radical, reduced by a hydroxy group in a 2- or 3position, of a cyclic-oligomeric carbohydrate or of a derivative of such a carbohydrate,A.sub.1 is the radical, reduced by a hydroxymethyl group, of a monomeric or linear oligomeric carbohydrate or of a derivative of such a carbohydrate, andY is --O--, --NH-- or --N(C.sub.1 -C.sub.6 alkyl)-.Homo- and co-polymers having those monomers have, depending upon their composition, hydrophilic, amphiphilic or hydrophobic properties and are able to form hydrogels. The polymers can be used, for example, as surfactants, thickeners, carriers for biologically active ingredients or in the manufacture of contact lenses.
    Type: Grant
    Filed: July 26, 1994
    Date of Patent: January 30, 1996
    Assignee: Ciba Geigy Corporation
    Inventor: Dirk Vetter
  • Patent number: 5466794
    Abstract: The present invention relates to novel thermoplastic, water-insoluble cellulose hydroxyalkyl hydroxycarboxylic acid esters of the general structureCell--O--Rwhere Cell--O is the substituted OH group of a polymeric cellulose unit and R is either a monomeric and/or polymeric hydroxyalkylether hydroxycarboxylic acid ester of the structure X:X=--A--B--in which A is a linear polyether chain:A=(--D--O--).sub.nin which D signifies a linear aliphatic branched or unbranched chain with 2 to 11 C atoms and n is a whole number equal to or greater than 1, and B is a linear polyester chain: ##STR1## in which E signifies a linear aliphatic branched or unbranched chain with 2 to 5 C atoms and m is a whole number equal to or greater than 1, or R is equal to A or B or X and a combination thereof in any ratio, or R is equal to H (hydrogen) according to the degree of substitution per anhydroglucose unit (max. 3) with A, B or X, and a process for their production and use of these cellulose derivatives as biodegradable mouldings.
    Type: Grant
    Filed: May 17, 1994
    Date of Patent: November 14, 1995
    Assignee: Wolff Walsrode Aktiengesellschaft
    Inventors: Jochen Kalbe, Hanns P. Muller, Rainhard Koch, Jurgen Engelhardt, Wolfgang Koch, Klaus Szablikowski, Gunter Weber
  • Patent number: 5441932
    Abstract: An inhibitor of the biosynthesis of sugar chains containing sialic acid that is excellent in the suppression of inflammation or allergy, which comprises as an active ingredient a sugar compound of the formula (1): ##STR1## wherein R.sup.1 is a hydrogen atom, a substituted or unsubstituted aliphatic hydrocarbon group, a substituted or unsubstituted aromatic hydrocarbon group, a peptide residue or a glycoprotein, and R.sup.2 is a hydrogen atom, a sulfhydryl group, an acyloxy group, an acylthio group, an aryloxy group, an alkyloxy group or a glycothio residue. The inhibitor of the biosynthesis of sugar chains containing sialic acid may be used as a therapeutic agent for inflammation caused by sugar chains containing sialic acid.
    Type: Grant
    Filed: March 2, 1993
    Date of Patent: August 15, 1995
    Assignee: Japan Tobacco, Inc.
    Inventors: Hisashi Kodama, Hironobu Hashimoto, Yasuhiro Kajihara
  • Patent number: 5302196
    Abstract: The invention relates to water-soluble cellulose ethers, containing at least one fluorine-free radical attached via an ether link and selected from the group hydroxyethyl, hydroxypropyl, methyl, ethyl and carboxymethyl, and a hydrophobic substituent which comprises one fluorine-containing alkyl radical of 3 to 24, in particular 5 to 18, carbon atoms, the fluorine content being 0.05 to 5, in particular 0.1 to 1% by weight, based on the dry weight of the cellulose ether.
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: April 12, 1994
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Christoph Meister, Reinhard Donges, Walter Schermann, Walter Schrattenholz
  • Patent number: 5187269
    Abstract: A fluorine-containing cellulose derivative of the formula:[C.sub.6 H.sub.7 O.sub.2 (OH).sub.a (OR).sub.b (OCOA).sub.c ].sub.
    Type: Grant
    Filed: February 8, 1990
    Date of Patent: February 16, 1993
    Assignee: Daikin Industries Ltd.
    Inventors: Nobuo Shiraishi, Motonobu Kubo
  • Patent number: 5182379
    Abstract: Modified cellulose esters are described that are prepared by grafting melamine moieties onto the backbone of cellulose esters. The resulting materials are useful in coating applications for wood, leather, and metal substrates and yield highly solvent-resistant coatings with enhanced properties when heated in the presence of an acid catalyst.
    Type: Grant
    Filed: June 5, 1990
    Date of Patent: January 26, 1993
    Assignee: Eastman Kodak Company
    Inventors: Phillip M. Cook, David S. Kashdan
  • Patent number: 5093486
    Abstract: A modified cellulose and/or chitin for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein cell is unmodified cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 in the case of chitin, R' is CH.sub.3 and/or C.sub.2 H.sub.5 and/or C.sub.3 H.sub.7, X denotes specified functional groups, m=0.75 to 2.85, and x=0.005 to 2.10. A process for preparation of the cellulose and/or chitin derivatives is also disclosed.
    Type: Grant
    Filed: October 19, 1990
    Date of Patent: March 3, 1992
    Assignee: Akzo N.V.
    Inventor: Michael Diamantoglou
  • Patent number: 5093488
    Abstract: A modified cellulose and/or chitin for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein cell is cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 in the case of chitin, R' is CH.sub.3 and/or C.sub.2 H.sub.5 and/or C.sub.3 H.sub.7, X denotes specified functional groups, R" is H or R, R"' denotes R, x+t=0.75 to 2.85, t=0 to 2.85, x=0 to 2.85, and r=0 to 1. A process for preparation of the cellulose and/or chitin derivatives is also disclosed.
    Type: Grant
    Filed: October 19, 1990
    Date of Patent: March 3, 1992
    Assignee: Akzo N.V.
    Inventor: Michael Diamantoglou
  • Patent number: 5093489
    Abstract: A modified cellulose and/or chitin for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein Cell is cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 in the case of chitin, R' is CH.sub.3 and/or C.sub.2 H.sub.5 and/or C.sub.3 H.sub.7, X denotes specified functional groups, R" is H or R, Z corresponds to the following groups of atoms: SR", SO.sub.3 H and salts thereof, SO-R, SONR".sub.2, SO.sub.2 -R, SO.sub.2 NR".sub.2, SO.sub.2 H and salts thereof, F, Cl, Br, I, NR".sub.2, PR".sub.2, PO.sub.3 H.sub.2 and salts thereof, PO.sub.2 H(OR), PO(OR).sub.2, PO.sub.2 HR" and salts thereof, POR"(OR) and POR".sub.2, x+t=0.75 to 2.85, t=0 to 2.85, x=0 to 2.85, and z=0.01 to 0.45. A process for preparation of the cellulose and/or chitin derivatives is also disclosed.
    Type: Grant
    Filed: October 19, 1990
    Date of Patent: March 3, 1992
    Assignee: Akzo N.V.
    Inventor: Michael Diamantoglou
  • Patent number: 5008385
    Abstract: Cellulose derivatives are disclosed which have the following formula: ##STR1## wherein Z is selected from the group consisting of alkylene, alkenylene, alkynylene, cycloalkylene or benzylene or xylylene radicals, which may or may not be substituted;X is selected from the group consisting of --H, --NR.sub.2, --N.sup.+ R.sub.3, --CN, --COOH, --SO.sub.3 H, --SO.sub.3 H, --PO(OR).sub.2, CONR.sub.2 or --Si(OR).sub.3 ;R is selected from the group consisting of hydrogen, alkyl and alkenyl groups having from 1 to 25 carbon atoms, and cycloalkyl, tolyl and phenyl groups;Y is selected from the group consisting of alkyl, alkenyl, alkynyl groups having from 1 to 36 carbon atoms, which may or may not be substituted, cycloalkyl, phenyl, tolyl and benzyl groups, ##STR2## (--CH.dbd.CH--COOH), and NHR, where R has the same meaning as in X, andm=0 to 2.5n=0.01 to 2.95,with the provision that, when m=0, n.gtoreq.1.55, if Y is an alkyl radical with 1 to 5 carbon atoms, 3-(CH.sub.2).sub.
    Type: Grant
    Filed: July 15, 1988
    Date of Patent: April 16, 1991
    Assignee: Akzo N.V.
    Inventor: Michael Diamantoglou
  • Patent number: 4997935
    Abstract: A modified cellulose for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein cell is cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 in the case of chitin, R' is CH.sub.3 and/or C.sub.2 H.sub.5 and/or C.sub.3 H.sub.7, X denotes specified functional groups, R" is H or R, R"' denotes R, x+t=0.75 to 2.85, t=0 to 2.85, x=0 to 2.85, and r=0 to 1. A process for preparation of the cellulose derivatives is also disclosed.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: March 5, 1991
    Assignee: Akzo N.V.
    Inventor: Michael Diamantoglou
  • Patent number: 4981959
    Abstract: A modified cellulose for biocompatible dialysis membranes having a structure represented by the formula ##STR1## wherein cell is unmodified cellulose or chitin, in each case without hydroxyl groups, s=3 in the case of cellulose and s=2 in the case of chitin, R' is CH.sub.3 and/or C.sub.2 H.sub.5 and/or C.sub.3 H.sub.7, X denotes specified functional groups, m=0.75 to 2.85, and x=0.005 to 2.10. A process for preparation of the cellulose derivatives is also disclosed.
    Type: Grant
    Filed: February 27, 1989
    Date of Patent: January 1, 1991
    Assignee: Akzo N.V.
    Inventor: Michael Diamantoglou