Carboxylic Patents (Class 536/110)
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Patent number: 6001473Abstract: Release coating compositions comprising:a) a starch ester release agent having an ester component of 2 to 8 carbon atoms and a degree of substitution (DS) of from 1.0 to 2.2;b) a hydrophobic plasticizer; andc) water.Type: GrantFiled: May 10, 1999Date of Patent: December 14, 1999Assignee: National Starch and Chemical Investment Holding CorporationInventors: Jeffrey G. Atkinson, Robert L. Billmers, Susan W. Graham, Charles J. Gzemski
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Patent number: 5935826Abstract: The present invention relates to modified starches which are prepared by enzymatic hydrolysis of a starch molecule using glucoamylase after the preparation of a starch derivative containing a hydrophobic group or both a hydrophobic and a hydrophilic group, particularly octenyl succinic anhydride starch hydrolyzed by glucoamylase. Such modified starches are useful as emulsifying and/or encapsulating agents, particularly in systems where high load and retention of the active ingredient, low surface oil exposure, and excellent oxidation resistance is desired.Type: GrantFiled: October 31, 1997Date of Patent: August 10, 1999Assignee: National Starch and Chemical Investment Holding CorporationInventors: Emily Keller Blue, Chung-Wai Chiu, Zahera Hussain, Himanshu Shah, Paul Trubiano
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Patent number: 5869647Abstract: A method of preparing biodegradable moldable products and films includes the steps of preparing biodegradable, hydrophobic, modified starch, and forming a thermoplastic product, comprising the modified starch, and optionally a miscible and biodegradable plasticizer, and/or a compatible filler.Type: GrantFiled: July 27, 1993Date of Patent: February 9, 1999Assignee: Evercorn, Inc.Inventors: Ramani Narayan, Steven Bloembergen, Amit Lathia
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Patent number: 5840883Abstract: Disclosed are a dextrin ester of fatty acids in which dextrin has an average saccharide polymerization degree of 3 to 150, the fatty acids comprise a straight chain fatty acid having 8 to 22 carbon atoms and at least one fatty acid selected from the group consisting of branched fatty acids having 4 to 26 carbon atoms, unsaturated fatty acids having 6 to 30 carbon atoms and straight chain saturated fatty acids having 6 or less carbon atoms, and the substitution degree of fatty acids per glucose unit is 1.0 to 3.0; and a gelling agent, a composition and a base comprising the ester, the ester being excellent in thixotropic property, moisture retaining property, emulsifiability, adhesion and dispersibility, and therefore suitably used for cosmetics, printing ink, coatings, etc.Type: GrantFiled: April 2, 1996Date of Patent: November 24, 1998Assignees: Chiba Flour Milling Co., Ltd., Kose CorporationInventors: Takanao Suzuki, Isaburo Amano, Koji Chiba, Ruka Tofukuji
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Patent number: 5797984Abstract: Biodegradable, expanded starch products are provided having increased resistance to water and high humidity and comprising low DS hydrophobic starch derivatives having the formula: ##STR1## where ST is starch, R is a dimethylene group, R' is a substituent hydrocarbon having 10 to 16 carbon atoms, Y is a metal, x is an integer equal to the valence of Y and derivative or ester group has a DS of from about 0.03 to 0.12.Type: GrantFiled: April 15, 1997Date of Patent: August 25, 1998Assignee: National Starch and Chemical Investment Holding CorporationInventors: Robert L. Billmers, Paul A. Altieri
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Patent number: 5789570Abstract: A biodegradable, swellable starch ester, containing more than 50% by weight of water-insoluble components and having a retention capacity of >500% for 0.9% (by weight) aqueous NaCl solution, and methods of its production and use.Type: GrantFiled: November 30, 1995Date of Patent: August 4, 1998Assignee: Degussa AktiengesellschaftInventors: Stefan Buchholz, Klaus Dorn, Thomas Eurich
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Patent number: 5731430Abstract: The invention relates to a new composition for sizing paper and board, containing a cationic polysaccharide esterified by a dicarboxylic acid anhydride, characterized in that the said dicarboxylic acid anhydride is substituted with a carbon chain, saturated or unsaturated, of branched structure.The anhydride may for example consist of tetrapropenylsuccinic anhydride or of any one of its isomers.The composition for sizing according to the invention may, if necessary, contain an oxidizing agent such as a persulphate. It may advantageously be applied to the surface treatment of printing and/or writing papers, in particular of papers for envelopes and of papers for impact-free printing such as inkjet printing.Type: GrantFiled: December 20, 1996Date of Patent: March 24, 1998Assignee: Roquette FreresInventors: Patrick Fuertes, Anne Lambin nee Delmotte, Jean-Louis Dreux
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Patent number: 5720978Abstract: Improved encapsulated products comprising a matrix of a starch hydrolyzate acid ester having a water-insoluble material encapsulated therein. In preferred embodiments, a reducing sugar is employed in the encapsulating process and the starch hydrolyzate ester is refined and an acid in combination with an acid salt is used in forming the starch hydrolyzate acid ester.Type: GrantFiled: December 22, 1995Date of Patent: February 24, 1998Assignee: Grain Processing CorporationInventor: Alpha L. Morehouse
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Patent number: 5719214Abstract: A polyester-grafted starch-polymer alloy is capable of imparting practical flexibility and toughness to moldings with no or only a little plasticizer. The polyester-grafted starch-polymer alloy comprises a blend of a polyester-grafted starch (a starch which has polyester graft chains on the starch molecule, with the terminal hydroxyl groups of the polyester graft chains and the hydroxyl groups connected directly to the starch entirely or partly blocked with the ester group) and an independent polyester (a polyester which is constructed of the same unit as said polyester graft chain, with its terminal hydroxyl groups entirely or partly blocked with the ester group) which are uniformly mixed together. A method of preparing the alloy and thermoplastic resin compositions containing the alloy also are disclosed.Type: GrantFiled: February 26, 1996Date of Patent: February 17, 1998Assignee: Japan Corn Starch Co., Ltd.Inventors: Hideyuki Tanaka, Tetsuya Kawamatsu, Isamu Utsue, Yasuhito Okumura, Hiroshi Tanaka
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Patent number: 5717087Abstract: 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: GrantFiled: August 2, 1996Date of Patent: February 10, 1998Assignee: Wolff Walsrode AGInventors: Jochen Kalbe, Reinhard Koch, Hanns Peter Muller, Jurgen Engelhardt, Wolfgang Koch, Volkhard Muller
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Patent number: 5714540Abstract: A starch derivative which, when incorporated with no or only a little plasticizer, yields moldings having good flexibility, toughness, and water-relating properties for practical use comprises an esterified, polyvinyl ester-grafted starch derivative which is formed by esterifying starch and grafting starch with a polyvinyl ester. The polyvinyl ester is derived from one or more saturated or unsaturated aliphatic acids or aromatic carboxylic acids having 2 to 18 carbon atoms.Type: GrantFiled: February 26, 1996Date of Patent: February 3, 1998Assignee: Japan Corn Starch Co., Ltd.Inventors: Hideyuki Tanaka, Isamu Utsue, Yasuhito Okumura, Tetsuya Kawamatsu, Hiroshi Tanaka
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Patent number: 5710269Abstract: Methods of synthesizing starch acetate containing at least 20% high molecular weight carbohydrates using a MSA catalyst alone, or in combination with a co-catalyst promoting cross-linking, such a phosphoric acid, are described. The MSA is desirably added slowly following beginning of the exothermic reaction of starch, acetic acid and acetic anhydride.Type: GrantFiled: January 16, 1996Date of Patent: January 20, 1998Assignee: Hoechst Celanese Corp.Inventor: Bernice I. Feuer
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Patent number: 5703226Abstract: A process for the uniform acylation of starch comprising preconditioning the starch with a base for at least six hours, adjusting the pH to a suitable range for acylation, adding the desired acylation agent and isolating the acylated starch. A continuous method for acylating starch is also described.Type: GrantFiled: May 8, 1995Date of Patent: December 30, 1997Assignee: Parrish & Heimbecker, LimitedInventors: Gary B. Nickel, Bernhard Berger
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Patent number: 5667803Abstract: The present invention is related to a novel type of composition with modifiable properties and suitable for controlled release of active ingredients in industrial use. The composition contains an active ingredient and starch acetate in the form of a compact. More specifically the invention relates to active ingredients such as solid dosage forms of drugs, especially compacts and tablets. In these compacts starch acetate with distinct substitution degrees are used. The starch acetate makes the process industrially feasible with good flowability and facilitates the formation of firm tablets. Starch acetate enables the controlled release of the active ingredient. The invention also discloses method for the preparation of the composition as well as its use.Type: GrantFiled: January 19, 1995Date of Patent: September 16, 1997Assignee: Oy Polymer Corex Kuopio Ltd.Inventors: Timo Petteri Paronen, Soili Hellevi Peltonen, Arto Olavi Urtti, Leena Johanna Nakari
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Patent number: 5656292Abstract: The present invention is related to a composition for pH dependent or pH regulated controlled release of active ingredients especially drugs. The composition consists of a compactible mixture of the active ingredient and starch molecules substituted with acetate and dicarboxylate residues. The preferred dicarboxylate acid is succinate. The average substitution degree of the acetate residue is at least 1 and 0.2-1.2 for the dicarboxylate residue. The starch molecules can have the acetate and dicarboxylate residues attached to the same starch molecule backbone or attached to separate starch molecule backbones. The present invention also discloses methods for preparing said starch acetate dicarboxylates by transesterification or mixing of starch acetates and starch dicarboxylates respectively.Type: GrantFiled: July 5, 1995Date of Patent: August 12, 1997Assignee: Alko Group Ltd.Inventors: Arto Olavi Urtti, Soili Hellevi Peltonen, Timo Petteri Paronen, Leena Johanna Nakari, Jani-Emanuel Vuorenpaa
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Patent number: 5635609Abstract: Particles, preparation methods therefor, and compositions containing same. The particles include at least one esterified polysaccharide and at least one polyamine, as well as at least one gellable polysaccharide when neither the esterified polysaccharide nor the polyamine can be gelled under the selected operating conditions. Said particle includes, at least on its surface, a membrane consisting of the product of the transacylation reaction between the esterified polysaccharide and said polyamine within an optionally gellable gel, said reaction causing the formation of covalent amide bonds. Such particles may be used to encapsulated various active principles useful in the fields of cosmetics, pharmaceuticals and agri-foodstuffs, enzymes, cells and micro-organisms.Type: GrantFiled: July 20, 1995Date of Patent: June 3, 1997Assignee: ColeticaInventors: Marie-Christine Levy, Florence Edwards-Levy, Isabelle Orly
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Patent number: 5633368Abstract: Partially acylated cyclodextrins of the formula I ##STR1## where R denotes hydrogen or R1, wherein R1 can be identical or different and denotes acetyl, propionyl, butyryl, 2-alkoxyacetyl, 2-chloroacetyl, 2-fluoroacetyl, 2-N-acetylaminoacetyl, methacryloyl or acryloyl, and the DS for R1, measured by means of .sup.1 H NMR spectroscopy, is between 0.30 and 1.20; and a process for preparing partially acylated .beta.-cyclodextrins and also a process for their use.Type: GrantFiled: April 18, 1995Date of Patent: May 27, 1997Assignee: Consortium f ur elektrochemische Industrie GmbHInventor: Rolf Hirsenkorn
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Patent number: 5629416Abstract: A process for preparing biodegradable, high humidity resistant crosslinked starch esters comprising reacting starch with monocarboxylic acid anhydride in a caustic catalyzed system to a DS of about 1.3 to 2.7 and crosslinking the starch ester in the same reaction mixture with polyfunctional acid and/or anhydride.Type: GrantFiled: March 31, 1995Date of Patent: May 13, 1997Assignee: National Starch and Chemical Investment Holding CorporationInventors: Dennis Neigel, Lawrence J. Scotchie, Martin M. Tessler
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Patent number: 5612321Abstract: 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: GrantFiled: June 22, 1995Date of Patent: March 18, 1997Assignee: Hercules IncorporatedInventor: Tuyen T. Nguyen
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Patent number: 5587412Abstract: According to the present invention there is provided a composition as obtained from a melt comprising esterified starch, preferably having an amylose content of at least about 50% by weight with respect to that of the starch, and being substituted to a degree of at least about 1.5, preferably from about 1.8 to about 2.9. The starch ester may be of the kind obtained by reaction of a mixed acid anhydride with starch.Type: GrantFiled: February 6, 1995Date of Patent: December 24, 1996Assignee: National Starch and Chemical Investment Holding CorporationInventors: Gerd Borchers, Ingo Dake, Albrecht Dinkelaker, Jean-Pierre Sachetto, Richard Zdrahala, Stephen Rimsa, Gary Loomis, Paul Tatarka, Olivier Mauzac
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Patent number: 5521292Abstract: The present invention provides:(1) a polysaccharide derivative having hydrophilic functional groups and nitrate groups per one repeating unit in the following range:0.2.ltoreq.X.ltoreq.1.5, 0.4.ltoreq.Y.ltoreq.2.2, X+Y<3;wherein X and Y represent the number of hydrophilic functional groups and nitrate groups, respectively;(2) the neutralized polysaccharide derivative;(3) the composition used as a binder containing the neutralized polysaccharide and water; and(4) the composition used as a vehicle containing the neutralized polysaccharide, a resin, an organic solvent and water.The vehicle composition has excellent properties such as drying characteristic, pigment dispersibility, compatibility with water soluble resins and thixotropic property, and it can form a clear continuous film having excellent heat resistance and blocking resistance.Type: GrantFiled: February 13, 1995Date of Patent: May 28, 1996Assignee: Asahi Kasei Kabushiki KaishaInventors: Ikuo Ueda, Nomura Tadanori
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Patent number: 5514790Abstract: A process for producing a starch intermediate product in which the reactive hydroxy groups are activated by swelling and disintegrating starch with dilute aqueous-alkali lye, precipitating the disintegrated starch from an aqueous-alkali solution by adding a precipitant which is miscible with water, separating the precipitated disintegrated starch, which exists in a highly activated form, from the filtrate producing a starch intermediate product, and drying the starch intermediate product. A starch intermediate product produced by this process results in a starch which exists in a highly activated form but which is stable in storage.Type: GrantFiled: April 24, 1995Date of Patent: May 7, 1996Assignee: EMS-Inventa AGInventors: Rainer Frische, Bernd Best, Hermann Schomann, Heinz G. Hoff
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Patent number: 5470841Abstract: A metabolizable blood plasma substitute is described which contains a starch ester with a molecular weight (Mw) of>20000 Daltons and a molar substitution of 0.1 to 1.5 as a colloidal component. The starch ester is for example acetyl starch with a molecular weight (Mw) of 200000 to 230000 Daltons and a molar substitution of 0.3 to 0.5.Type: GrantFiled: January 7, 1994Date of Patent: November 28, 1995Assignee: Laevosan-Gesellschaft mbHInventors: Harald Forster, Fatima Asskali, Ernst Nitsch
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Patent number: 5436232Abstract: A pharmaceutical composition is described as well as the use of a starch ester for the production of such a pharmaceutical composition for peritoneal dialysis (CAPD) in particular for continuous ambulatory peritoneal dialysis. Starch esters which are particularly suitable are e.g. acetyl starch with a molecular weight (Mw) of 100000 to 200000 Daltons and a molar substitution of 0.3 to 0.5. Using the compositions according to the invention it is possible to carry out peritoneal dialysis without damaging the peritoneal epithelium. In addition it is not stored in the organs.Type: GrantFiled: January 7, 1994Date of Patent: July 25, 1995Assignee: Laevosan-Gesellschaft MBHInventors: Harald Forster, Fatima Asskali, Ernst Nitsch
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Patent number: 5434201Abstract: A method of preparing a hot melt adhesive composition comprising a starch ester having a DS (degree of substitution) of 0.3 to 3.0 and a selected non-volatile, organic diluent wherein the starch ester is a wetcake having 40% or more by weight of moisture.Type: GrantFiled: July 29, 1994Date of Patent: July 18, 1995Assignee: National Starch and Chemical Investment Holding CorporationInventors: Dennis Neigel, Gregory A. Sweeey, Paul Altieri, Charles W. Paul, Robert L. Billmers, David C. Rawlins
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Patent number: 5354559Abstract: Improved encapsulated products comprising a matrix of a starch hydrolyzate acid ester having a water-insoluble material encapsulated therein. In preferred embodiments, a reducing sugar is employed in the encapsulating process and the starch hydrolyzate ester is refined and an acid in combination with an acid salt is used in forming the starch hydrolyzate acid ester.Type: GrantFiled: April 6, 1993Date of Patent: October 11, 1994Assignee: Grain Processing CorporationInventor: Alpha L. Morehouse
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Patent number: 5321132Abstract: Starch esters having an intermediate DS of about 0.5 to 1.8 are prepared in an aqueous one step process by reacting starch with high treatment levels of organic acid anhydride and high concentrations of alkaline reagent.Type: GrantFiled: December 23, 1992Date of Patent: June 14, 1994Assignee: National Starch and Chemical Investment Holding CorporationInventors: Robert L. Billmers, Martin M. Tessler
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Patent number: 5164215Abstract: The batter starch is esterified to have a degree of substitution between 0.02 to 0.1, and a protein content greater than or equal to 1.0%. The starch is obtained from a starch bearing plant of the duh homozygous genotype. Maize is the preferred source for the starch and the preferred protein source is gluten. The preferred esterification agent is acetic anhydride.Type: GrantFiled: December 10, 1990Date of Patent: November 17, 1992Inventors: Susan L. Furcsik, Edward D. DeBoer
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Patent number: 5120719Abstract: A conjugate formed by the covalent bonding of a prostaglandin or a similar compound thereto and a polysaccharide. The prostaglandin is selected from prostaglandin E1, prostaglandin E2, prostaglandin F2.alpha., prostaglandin I2, carbacycline and iloprost and the polysaccharide is selected from pluran, amylose, amylopectin, cellulose, dextran and hydroxyethylated starch.Type: GrantFiled: November 15, 1989Date of Patent: June 9, 1992Assignee: Eisai Co., Ltd.Inventors: Kiyoshi Iwamoto, Masahiro Kawahara, Sumio Watanabe, Yasuo Miyake, Fumio Sagami
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Patent number: 5120562Abstract: The batter starch is esterified to have a degree of substitution between 0.02 and 0.1, and a protein content greater than or equal to 1%. The starch is obtained from a starch bearing plant of the aedu homozygous genotype. Maize is the preferred source for the starch and the preferred protein source is gluten. The preferred esterification agent is acetic anhydride.Type: GrantFiled: December 10, 1990Date of Patent: June 9, 1992Assignee: American Maize-Products CompanyInventors: Susan L. Furcsik, Edward D. DeBoer
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Patent number: 5032683Abstract: Modified starch dispersions are prepared by gelatinizing various starches and starch blends and reacting the starch in the presence of a glyoxal compound to produce an aqueous starch dispersion having a storage-stable and coatable viscosity. The starch dispersions provides a film which displays good tensile strength and elongation properties.Type: GrantFiled: June 26, 1989Date of Patent: July 16, 1991Assignee: Sequa Chemicals, Inc.Inventors: Louis R. Dragner, William C. Floyd, James W. Ramp
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Patent number: 5028725Abstract: This invention relates to novel compounds which are precursors for di- and triarylmethane dye precursor compounds possessing a thiolactone, dithiolactone or thioether ring-closing moiety.Type: GrantFiled: December 7, 1989Date of Patent: July 2, 1991Assignee: Polaroid CorporationInventor: Patrick F. King
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Patent number: 4985553Abstract: Process for the selective oxidation of di-, tri-, oligo- and polysaccharides comprising a reducing terminal function of the aldose type into polyhydroxycarboxylic acids, wherein the oxidation is carried out in an alkaline medium by means of an oxygen-containing gas, in the presence of a noble metal based catalyst selected from the group constituted by palladium, platinum, rhodium and osmium and fixed on an inert support, said catalyst being "doped" with one or several metals, or promoters, of Groups IV, V or VI of the Periodic Table.Type: GrantFiled: January 28, 1987Date of Patent: January 15, 1991Assignee: Roquette FreresInventors: Patrick M. Fuertes, Guy M. Fleche
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Patent number: 4958015Abstract: Resins resulting from the crosslinking of cyclodextrin with dicarboxylic acid dihalides often show marginal binding capacity for guest molecules and poor kinetics of guest molecule removal because of the limited porosity of the resins. Resins whose apparent bulk density has been reduced by at least 20% show an enhancement in both of the aforementioned properties resulting from an increase in porosity of the resins. Such resins in general can be formed by conducting the crosslinking reaction in the presence of a blowing agent. The resulting materials retained their desirable physical properties for use in a fixed or packed bed.Type: GrantFiled: September 30, 1988Date of Patent: September 18, 1990Assignee: UOPInventors: Haya Zemel, Mark B. Koch
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Patent number: 4956287Abstract: The process for producing an oleaginous composition of the present invention comprises transesterifying a fat containing a large amount of polybasic unsaturated fatty acid(s) as constituting fatty acid(s) with saturated fatty acid(s) and/or saturated fatty acid alcohol ester(s) with the use of a lipase having an site-specificity to thereby give symmetric triglyceride(s) wherein the fatty acid groups at the 1- and 3-positions are selectively transesterified and a polybasic unsaturated fatty acid group is present at the 2-position. The above transesterification should be carried out under such conditions as to give an oleaginous composition which comprises 40% or more of symmetric triglyceride(s) each having a polybasic unsaturated fatty acid group at the 2-position and 50% or more of completely saturated fatty acid(s) each having 16 or more carbon atoms.Type: GrantFiled: December 14, 1987Date of Patent: September 11, 1990Assignee: Asahi Denka Kogyo Kabushiki KaishaInventors: Kazuaki Suzuki, Shoji Maruzeni, Eiji Nakai, Toru Nezu
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Patent number: 4906744Abstract: A method for the production of new derivatives of watersoluble cellulose ethers by the reaction of 100 parts by weight of a water-soluble cellulose ether with 3 to 30 parts by weight of C.sub.8-18 alkyl(ene) succinic acid anhydride, in the absence of water and under neutral or acid conditions at elevated temperature, until, in analytically detectable terms, 1 to 8% by weight, based on the cellulose ether, of alk(en)yl succinic acid has reacted with the cellulose molecule; the products of the method; and their use as thickners for aqueous surfactant solutions, dye dispersions, and for hydraulically setting building materials or their use as protective colloids or emulsifiers in the suspension polymerization of water-insoluble monomers in aqueous phase.Type: GrantFiled: February 3, 1989Date of Patent: March 6, 1990Assignee: Henkel CorporationInventors: Manfred Peuscher, Konrad Engelskirchen, Eberhard Gruenberger
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Patent number: 4902788Abstract: Composites on a porous support of an insolubilized, crosslinked cyclodextrin show improved mass transfer characteristics relative to discrete particles of the same insolubilized cyclodextrin. Dicarboxylic acid dihalides are particularly effective crosslinking agents. The composites can be prepared quite simply and cost effectively by impregnating a support, such as alumina, with a cyclodextrin, then reacting the cyclodextrin within the impregnated support with a suitable dicarboxylic acid dihalide, such as one from the alkane dicarboxylic acid series containing from 4 through 12 carbon atoms.Type: GrantFiled: September 29, 1988Date of Patent: February 20, 1990Assignee: UOPInventors: Haya Zemel, Mark B. Koch, Ronald P. Rohrbach
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Patent number: 4744975Abstract: 6-Iodoethylated starch and process for preparing the same are disclosed. The 6-idodethylated starch contains one iodine attached per 5 glucose units. Said compound is useful as a contrast agent for X-ray examination, especially for opacifying the vascular os lymphatic vessel. Said compound is produced by reacting 6-hydroxyethylated starch with N-iodosuccinimide in the presence of triphenylphosphine.Type: GrantFiled: May 20, 1986Date of Patent: May 17, 1988Assignee: Nippon Universal Pharmaceutical Co., Ltd.Inventors: Tetsuo Suami, Masao Sako
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Patent number: 4720544Abstract: Preparation of a starch ester having an Mn of 1000-50,000 and a degree of substitution of 0.4-3.0 by heating a mixture of starch, a Cl-7 monocarboxylic acid, water, and optionally a catalyst and meanwhile withdrawing water until the ester being formed has attained the desired degree of substitution. Optionally remaining free hydroxyl groups may be esterified by reaction with a carboxylic anhydride of -halide. The resulting solution may be treated to neutralize remaining free monocarboxylic acid by mixing it with an esterifiable hydroxyl compound and esterifying it at 40.degree.-270.degree. under the removal of water. In this way, use is made of cheap ingredients, and the resulting product is suitable for immediate use in a number of applications, e.g., as binder in coating compositions.Type: GrantFiled: May 8, 1986Date of Patent: January 19, 1988Assignee: Akzo N.V.Inventor: Arend J. Schouten
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Patent number: 4501888Abstract: This invention describes a process for acetylating (esterifying) starches including dispersing the starch in an organic acid; contacting the starch with an organic acid anhydride; and reacting the components in the presence of a quaternary ammonium halide.Type: GrantFiled: January 24, 1984Date of Patent: February 26, 1985Assignee: A. E. Staley Manufacturing CompanyInventor: James C. Schmidt
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Patent number: 4393202Abstract: The production rate and yield resulting from the dewatering of starch conversion products containing swollen starch granules resulting from treatments with cationic reagents is improved by the addition to the starch slurry of a water soluble anionic polymer.Type: GrantFiled: August 17, 1982Date of Patent: July 12, 1983Assignee: National Starch and Chemical CorporationInventor: William F. Breuninger
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Patent number: 4387221Abstract: Novel C.sub.1 -C.sub.22 alkyl- and C.sub.3 -C.sub.22 alkenyl-sulfosuccinate starch half-esters are prepared by reacting a starch base or a modified starch base containing anionic, cationic, and/or nonionic substituent groups with about 0.1 to 100% by weight of the corresponding alkyl- or alkenyl-sulfosuccinic anhydride. The reaction is carried out at pH 5-9 and at 5.degree.-90.degree. C. for 0.5-20 hours or at pH 9-11 at 5.degree.-30.degree. C. for about 0.5-3 hours. This one-step method may also be used to prepare sulfosuccinate half-esters. The long chain derivatives (e.g. octyl-, octadecyl-, octenyl-, and dodecenyl-sulfosuccinate half-esters) are hydrophobic.Type: GrantFiled: April 1, 1982Date of Patent: June 7, 1983Assignee: National Starch and Chemical CorporationInventors: Martin M. Tessler, Otto B. Wurzburg, Teresa A. Dirscherl
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Patent number: 4379919Abstract: Novel starch sulfomaleate half-esters are prepared by reacting a starch base or a modified starch containing anionic, cationic, and/or nonionic substituent groups with about 0.1 to 100% by weight of sulfomaleic anhydride or its salts. The reaction is carried out at pH 5-9 and at 5.degree.-90.degree. C. for 0.5-20 hours or at pH 9-11 and at 5.degree.-30.degree. C. for about 0.5-3 hours. The starch sulfomaleates may be reacted with sulfurous acid or its acid salts (e.g. sodium bisulfite) to form the novel starch disulfosuccinate.Type: GrantFiled: April 1, 1982Date of Patent: April 12, 1983Assignee: National Starch and Chemical CorporationInventors: Martin M. Tessler, Otto B. Wurzburg, Teresa A. Dirscherl
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Patent number: 4334061Abstract: A process for recovering polyol fatty acid polyesters from the crude reaction product in which it is produced by contacting with an aqueous washing medium in the presence of an emulsion decreasing organic solvent so that the alkali metal fatty acid soaps and the color-forming bodies are taken into the aqueous phase, and upon settling the phases are separated from each other.Type: GrantFiled: October 29, 1979Date of Patent: June 8, 1982Assignee: Ethyl CorporationInventor: Joseph A. Bossier, III
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Patent number: 4330440Abstract: The invention relates to the carbonylation of cross linked substituted and unsubstituted polysaccharides, their copolymers with macroporous synthetic polymers, macroporous synthetic polymers and rigid supports with pendant hydroxyalkyl groups. The carbonylated product can be used to prepare an affinity chromatography matrix which remains an uncharged species at varying pH's. The carbonylated product is also useful for the preparation of other compounds: Typical polysaccharides are agarose, starch, dextran, cellulose and regenerated cellulose, typical macroporous synthetic polymers are acrylamides, acrylates and methacrylates, typical rigid supports are silica beads coated with hydroxy alkyl groups and typical cabonylating agents are N,N'-carbonyl diimidazole; N,N'carbonyl di-1,2,3-benzotriazole; and N,N'-carbonyl di-1,2,4-triazole.Type: GrantFiled: March 10, 1980Date of Patent: May 18, 1982Assignee: Development Finance Corporation of New ZealandInventors: John S. Ayers, Geoffrey S. Bethell, William S. Hancock, Milton T. W. Hearn
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Patent number: 4294731Abstract: A method for oven drying chemically modified cellulosic materials, especially fibers, having improved fluid absorbency involves incorporating into the cellulose structure while swollen an amphiphilic compound miscible with water which will not evaporate when the fiber is oven dried and will remain in the fiber to prevent collapse of the fiber as the water is removed. The improved method of drying the fibrous cellulosic material produces a product having saline absorbency about equal to that produced when the fibers are dried with a water-miscible solvent and avoids the use of volatile solvents and the disadvantages inherent therewith. The fibers provided by the invention are especially suitable for use in pads which are to be used for absorbing water and body fluids.Type: GrantFiled: August 13, 1980Date of Patent: October 13, 1981Assignee: Akzona IncorporatedInventor: Thomas C. Allen
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Patent number: 4260738Abstract: Starch ether derivatives are prepared by reacting a starch base with N-(2-haloethyl)iminobis(methylene)diphosphonic acid or with a N-(alkyl)-N-(2-haloethyl)aminomethylphosphonic acid. The derivatives contain aminophosphonic acid groups (or their salts) as zwitterion substituents which consist of either one or two anionic methylene phosphonic acid groups bound to a cationic nitrogen. Their cationic or anionic characteristics may be increased by introducing suitable cationic or anionic groups either by simultaneous reaction with the aminophosphonic acid reagent or by consecutive reaction either prior to or subsequent to the aminophosphonic acid reaction. They are especially useful as pigment retention aids in paper making processes.Type: GrantFiled: January 10, 1980Date of Patent: April 7, 1981Assignee: National Starch and Chemical CorporationInventor: Martin M. Tessler
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Patent number: 4247568Abstract: Non-digestible food additives are prepared by heating starch with an edible di- or tri-basic carboxylic acid and anhydrides thereof acid at 140.degree. to 220.degree. C. under reduced pressure and in the presence of less than 5% water for sufficient time to form a non-digestible product.Type: GrantFiled: July 25, 1978Date of Patent: January 27, 1981Assignee: Pfizer Inc.Inventors: Roy Carrington, George Halek
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Patent number: 4238604Abstract: A process for making an acetylated cross-linked starch substantially free of acetyl odor and flavor which comprises cross-linking a starch in a slurry, acetylating the cross-linked starch to an acetyl substitution of not more than 2.5%, thereafter washing the starch sufficiently to reduce the ash content to less than 0.20%, preferably forming a slurry of the acetylated cross-linked starch and adjusting the pH to 7 to 9.0, and thereafter drying the starch. The process provides a starch product which is substantially free from off odors or flavors and particularly useful in pudding formulations. Tapioca starch is utilized in preferred embodiments.Type: GrantFiled: October 6, 1978Date of Patent: December 9, 1980Assignee: General Foods CorporationInventors: Jay H. Katcher, Joseph A. Ackilli
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Patent number: 4224439Abstract: Carbonylation of a polysaccharide and the product of that carbonylation. The carbonylated product can be used to prepare an affinity chromatography matrix which is an uncharged species of varying pH's. The carbonylated product is also useful for the preparation of other compounds. Typical polysaccharides are agarose, starch, dextran, cellulose and regenerated cellulose and typical carbonylating agents are N,N'-carbonyl diimidazole; N,N' carbonyl di-1,2,3-benzotriazole; and N,N'-carbonyl di-1,2,4-triazole.Type: GrantFiled: February 2, 1978Date of Patent: September 23, 1980Assignee: Development Finance Corporation of New ZealandInventors: John S. Ayers, Geoffrey S. Bethell, William S. Hancock, Milton T. W. Hearn