Ethers Patents (Class 536/43)
  • Patent number: 10800858
    Abstract: Nonionic, water-soluble cellulose ethers are disclosed with hydroxyalkyl groups and ?-alkynyl groups, each joined to the cellulose via an ether bond, the degree of molar substitution MS(alkyne) being in the range from 0.001 to 0.30. The cellulose ethers may further contain azido groups, preferably 3-azido-2-hydroxypropyl groups, likewise joined to the cellulose by an ether bond, the MS(AHP) being in the range from 0.001 to 0.3. To obtain an adhesive, cellulose ether is mixed with water or, if the cellulose ether contains no alkyne groups, is mixed additionally with a non-ionic cellulose ether containing ?-alkyne groups and hydroxyalkyl groups, each bonded to the cellulose by ether bonds. The mixture is applied to at least one of the surfaces to be bonded and then is contacted with a copper(I) catalyst or a ruthenium catalyst. The adhesive is especially suitable for bonding wood, paper, cardboard or other cellulosic material.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: October 13, 2020
    Assignee: SE Tylose GmbH & Co. KG
    Inventors: Mike Kleinert, Diana Wischang
  • Patent number: 10624359
    Abstract: A method for producing a cellulose composite containing cellulose and a polysaccharide, wherein a median size of colloidal cellulose composites contained in the cellulose composite as measured by a dynamic light scattering method is 0.85 ?m or more, the method including treating a mixture containing cellulose, a polysaccharide and an aqueous medium together in a wet process, wherein a solid content is controlled to be 35 mass % or more, and temperature is set at 80° C. or less.
    Type: Grant
    Filed: November 15, 2016
    Date of Patent: April 21, 2020
    Assignee: ASAHI KASEI CHEMICALS CORPORATION
    Inventors: Kouichirou Enatsu, Haruko Obata, Naoaki Yamasaki
  • Patent number: 9434854
    Abstract: A curable aqueous composition is disclosed comprising a carbohydrate, a crosslinking agent, and an amine base, wherein the curable aqueous composition has a pH adjusted by the amine base. Further disclosed is a method of forming a curable aqueous solution.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: September 6, 2016
    Assignees: Knauf Insulation, Inc., Knauf Insulation SPRL
    Inventors: Brian Lee Swift, Ronald E. Kissell
  • Patent number: 9260627
    Abstract: A curable aqueous composition is disclosed comprising a carbohydrate, a crosslinking agent, and an amine base, wherein the curable aqueous composition has a pH adjusted by the amine base. Further disclosed is a method of forming a curable aqueous solution.
    Type: Grant
    Filed: April 19, 2013
    Date of Patent: February 16, 2016
    Assignees: Knauf Insulation, Inc., Knauf Insulation SPRL
    Inventors: Brian Lee Swift, Ronald E. Kissell
  • Patent number: 9150734
    Abstract: Disclosed are antifouling compositions that can include a biopolymeric matrix which is substantially zwitterionic. The compositions may include a biopolymer matrix having positively charged functional groups, negatively charged functional groups, zwitterionic functional groups, or a combination thereof, such that the composition is substantially zwitterionic. The compositions can be used as additives and as compositions further containing a base material such as paint or lacquer. Methods of making and using such compounds and compositions are also disclosed.
    Type: Grant
    Filed: March 7, 2012
    Date of Patent: October 6, 2015
    Assignee: Empire Technology Development LLC
    Inventor: Glen Leon Brizius
  • Patent number: 9040681
    Abstract: A production method of a cationized cellulose or a cationized hydroxyalkylcellulose, including step 1 for adding a cationizing agent to cellulose and mechanically decrystallizing the cellulose and step 2 for adding a basic compound to the mixture obtained in step 1 and mechanically decrystallizing the cellulose, or a production method of a cationized cellulose or a cationized hydroxyalkylcellulose, including a step 3 for adding a basic compound to cellulose and mechanically decrystallizing the cellulose and step 4 for adding a cationizing agent to the mixture obtained in step 3 and mechanically decrystallizing the cellulose. The cellulose and the cationizing agent are allowed to react with each other in step 2 or step 4.
    Type: Grant
    Filed: February 28, 2011
    Date of Patent: May 26, 2015
    Assignee: KAO CORPORATION
    Inventors: Akiyoshi Kimura, Keiichiro Tomioka, Toru Nishioka, Kohei Nakanishi
  • Patent number: 9040680
    Abstract: Non-ionic water-soluble cellulose ethers modified with 3-azido-2-hydroxypropyl groups bound via an ether link are provided having a molar degree of substitution MSAHP in the range from 0.001 to 0.50. Exemplary cellulose ethers are alkyl celluloses, including methyl, hydroxyalkyl (e.g. hydroxyethyl or hydroxypropyl) or alkylhydroxyalkyl cellulose (e.g. methylhydroxyethyl). Reaction products with alkyne compounds are also provided, resulting in a terminal alkyne group. The reaction of azide with the alkyne proceeds as a 1,3-dipolar cycloaddition reaction, advantageously with Cu(I) or ruthenium catalysts. A multiplicity of cellulose ethers can be obtained from the conversion reaction. Variations in the macroscopic properties can be achieved by controlled modification, ranging from increased or reduced viscosity. The reaction, taking place within a few seconds, requires only minimal catalyst.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: May 26, 2015
    Assignee: SE Tylose GmbH & Co. KG
    Inventor: Mike Kleinert
  • Patent number: 8969441
    Abstract: The present invention provides a novel cationized microfibrillated plant fiber and a method for manufacturing the same. A cationic microfibrillated plant fiber that is cationically modified with a quaternary-ammonium-group-containing compound, and that has an average diameter of 4 to 200 nm.
    Type: Grant
    Filed: February 4, 2011
    Date of Patent: March 3, 2015
    Assignees: Nippon Paper Industries Co., Ltd., Oji Holdings Corporation, Kyoto University
    Inventors: Hiroyuki Yano, Tadafumi Hashimoto, Akihiro Sato, Antonio Norio Nakagaito, Kazuo Kitagawa, Takeshi Semba, Akihiro Ito
  • Patent number: 8907079
    Abstract: The invention provides novel chemical entities based on sugar alcohols. These new chemical entities are biocompatible and biodegradable. The molecules can be made in a single and pure form. The molecular weights of these molecules range from small (<1000 Da) to large (1000-120,000 Da). The sugar alcohol-based molecules can have functional groups throughout the molecule for crosslinking compounds, such as the preparation of antibody-drug conjugates, or to facilitate the delivery of therapeutic proteins, peptides, siRNA, and chemotherapeutic drugs. Also provided are new conjugate entities prepared through sugar alcohol molecules. Methods of synthesizing sugar alcohol-based molecules and conjugates are also within the scope of the invention.
    Type: Grant
    Filed: March 13, 2014
    Date of Patent: December 9, 2014
    Assignee: CellMosaic Inc.
    Inventor: Yumei Huang
  • Patent number: 8729185
    Abstract: Provided is a method for producing a 2-cyanoethyl group-containing organic compound having a high ratio of replacement by cyanoethyl groups and a high dielectric constant. More specifically, provided is a method for producing a 2-cyanoethyl group-containing organic compound comprising a step of reacting acrylonitrile with a hydroxyl group-containing organic compound in the presence of a quaternary ammonium salt as a catalyst through a Michael addition.
    Type: Grant
    Filed: March 27, 2012
    Date of Patent: May 20, 2014
    Assignees: Shin-Etsu Chemical Co., Ltd., Matsugaki Chemical Industries Co., Ltd.
    Inventors: Ikuo Fukui, Kazuhisa Hayakawa, Soji Tanioka, Masahiro Ohgata, Masaaki Kajitani
  • Publication number: 20140094599
    Abstract: Non-ionic water-soluble cellulose ethers modified with 3-azido-2-hydroxypropyl groups bound via an ether link are provided having a molar degree of substitution MSAHP in the range from 0.001 to 0.50. Exemplary cellulose ethers are alkyl celluloses, including methyl, hydroxyalkyl (e.g. hydroxyetbyl or hydroxypropyl) or alkylhydroxyalkyl cellulose (e.g. methylhydroxyethyl). Reaction products with alkyne compounds are also provided, resulting in a terminal alkyne group. The reaction of azide with the alkyne proceeds as a 1,3-dipolar cycloaddition reaction, advantageously with Cu(I) or ruthenium catalysts. A multiplicity of cellulose ethers can be obtained from the conversion reaction. Variations in the macroscopic properties can be achieved by controlled modification, ranging from increased or reduced viscosity. The reaction, taking place within a few seconds, requires only minimal catalyst.
    Type: Application
    Filed: September 18, 2013
    Publication date: April 3, 2014
    Inventor: Mike KLEINERT
  • Patent number: 8569263
    Abstract: A method of producing silane-modified cationized cellulose that has excellent aqueous dispersibility, including: a step (1) of cationizing water-soluble cellulose ether in a presence of alkali in a mixed solvent of a water-compatible organic solvent to obtain slurry comprising cationized cellulose; a step (2) of adding acid to said slurry and neutralizing said alkali; a step (3) of reacting said cationized cellulose obtained after said neutralization with an aminosilane compound and a step (4) of drying the obtained slurry, wherein: drying is conducted in step (4) at 115-160° C. until weight loss on drying is 5% by weight or less, or there is also including a step (5) of adding a water-compatible organic solvent or a mixed solvent of a water-compatible organic solvent and water to the cationized cellulose after the neutralization so that water content in a whole solvent that contacts the cationized cellulose is 10% by mass or less.
    Type: Grant
    Filed: August 22, 2008
    Date of Patent: October 29, 2013
    Assignee: LION Corporation
    Inventors: Youichirou Kohno, Yoko Osako, Atsushi Ito
  • Publication number: 20130217872
    Abstract: A method for covalently cross-linking hyaluronic acid (HA) and hydroxypropyl methylcellulose (HPMC) by a diepoxide crosslinking agent. The method includes the following steps: a) mixing HA and HPMC in water; b) adding an alkali as a catalyst and a diepoxide as a crosslinking agent; c) neutralizing with hydrochloric acid and dehydrating with ethanol and acetone; and d) drying in vacuum and redissolving in water to obtain an HA-HPMC composite gel.
    Type: Application
    Filed: March 16, 2013
    Publication date: August 22, 2013
    Applicant: BEIJING AIMEIKE BIO-TECH CO., LTD.
    Inventor: BEIJING AIMEIKE BIO-TECH CO., LTD.
  • Patent number: 8506939
    Abstract: A personal care composition comprising a cationically modified cellulose ether, wherein the cellulose ether comprises from 0.5 to 4 moles of an ether substituent per mole of anhydroglucose repeat unit and the cellulose ether further substituted with a cationic substituent of the formula (I) wherein R1, R2 and R3 each independently are CH3 or C2H5, R4 is CH2—CHOH—CH2 or CH2CH2, Az? is an anion, and z is 1, 2 or 3, and the cellulose ether comprises from 1.15 to 1.44 percent of cationic nitrogen, based on the total weight of the cellulose ether. The cationically modified cellulose ethers which comprise from 6,000 to 15,000 anhydroglucose repeat units are novel.
    Type: Grant
    Filed: July 22, 2005
    Date of Patent: August 13, 2013
    Inventors: Xiaodong Zhang, Russell Lowell Kreeger, Tatiana Victorovna Drovetskaya
  • Publication number: 20130030154
    Abstract: Substrates comprising a solid support, a ligand, and a linker comprising at least one C, O, N, or S atom covalently connecting the solid support to the ligand, are disclosed, along with methods of using and making the substrates, and devices including the substrates.
    Type: Application
    Filed: July 23, 2012
    Publication date: January 31, 2013
    Applicant: PALL CORPORATION
    Inventors: Hassan AIT-HADDOU, Frank ONYEMAUWA, Jonathan HAIGH, Samuel NOCHUMSON
  • Publication number: 20130005957
    Abstract: A production method of a cationized cellulose or a cationized hydroxyalkylcellulose, including step 1 for adding a cationizing agent to cellulose and mechanically decrystallizing the cellulose and step 2 for adding a basic compound to the mixture obtained in step 1 and mechanically decrystallizing the cellulose, or a production method of a cationized cellulose or a cationized hydroxyalkylcellulose, including a step 3 for adding a basic compound to cellulose and mechanically decrystallizing the cellulose and step 4 for adding a cationizing agent to the mixture obtained in step 3 and mechanically decrystallizing the cellulose. The cellulose and the cationizing agent are allowed to react with each other in step 2 or step 4.
    Type: Application
    Filed: February 28, 2011
    Publication date: January 3, 2013
    Applicant: Kao Corporation
    Inventors: Akiyoshi Kimura, Keiichiro Tomioka, Toru Nishioka, Kohei Nakanishi
  • Publication number: 20120259067
    Abstract: Provided is a method for producing a 2-cyanoethyl group-containing organic compound having a high ratio of replacement by cyanoethyl groups and a high dielectric constant. More specifically, provided is a method for producing a 2-cyanoethyl group-containing organic compound comprising a step of reacting acrylonitrile with a hydroxyl group-containing organic compound in the presence of a quaternary ammonium salt as a catalyst through a Michael addition.
    Type: Application
    Filed: March 27, 2012
    Publication date: October 11, 2012
    Inventors: Ikuo Fukui, Kazuhisa Hayakawa, Soji Tanioka, Masahiro Ohgata, Masaaki Kajitani
  • Publication number: 20120095202
    Abstract: The present technology provides processes for cross-linking cellulose ethers under mild conditions. The processes include exposing a substantially dry cellulose ether film to a polyisocyanate to provide a cross-linked cellulose ether film, wherein the substantially dry cellulose ether film comprises alkoxide groups on the cellulose. The resulting cellulose ether films are highly cross-linked by polyurethane linkages and may be used as membranes in a variety of applications.
    Type: Application
    Filed: September 2, 2010
    Publication date: April 19, 2012
    Inventors: Patit Paban Kundu, Ratan Pal Singh
  • Publication number: 20120065388
    Abstract: A process for producing a silane-modified cationized polymeric compound, the process including the steps of: (1) cationizing a water-soluble polymeric compound in a mixed solvent of a water-miscible organic solvent and water in the presence of an alkali to produce a slurry containing a cationized polymeric compound, (2) adding an aminosilane compound to the slurry or a cake produced therefrom, thereby treating the cationized polymeric compound with the aminosilane compound, (3) optionally adding an acid to the slurry obtained in step (1) or a product obtained in step (2), and (4) drying a product obtained in step (2) or a product obtained by performing step (3) after step (2), wherein the drying step (4) includes a primary drying treatment step of performing drying at a temperature of 50 to 140° C. under a degree of vacuum of 4.0 to 53.3 kPa, and a secondary drying treatment step of drying the product obtained following the primary drying treatment at a temperature of 90 to 155° C.
    Type: Application
    Filed: May 18, 2010
    Publication date: March 15, 2012
    Applicant: Lion Corporation
    Inventors: Takeshi Yamada, Youichirou Kohno, Yoko Osako, Yoshifumi Yamagata
  • Publication number: 20110280914
    Abstract: Described herein are composites useful in tissue and organ engineering. In one aspect, the composite comprises the reaction product between a macromolecule comprising at least one thiol group and a gold nanoparticle. The thiolated macro-molecule crosslinks with the gold nanoparticle to produce a composite that is useful in anchoring cells. The composites can be used to form multi-layer 3-D structures, where the cells in each layer can aggregate and fuse with one another to form tissues and organs.
    Type: Application
    Filed: December 17, 2009
    Publication date: November 17, 2011
    Applicant: University of Utah Research Foundation
    Inventors: Glenn D. Prestwich, Aleksander Skardel, Jianxing Zhang
  • Publication number: 20110218336
    Abstract: A method of producing silane-modified cationized cellulose that has excellent aqueous dispersibility, including: a step (1) of cationizing water-soluble cellulose ether in a presence of alkali in a mixed solvent of a water-compatible organic solvent to obtain slurry comprising cationized cellulose; a step (2) of adding acid to said slurry and neutralizing said alkali; a step (3) of reacting said cationized cellulose obtained after said neutralization with an aminosilane compound and a step (4) of drying the obtained slurry, wherein: drying is conducted in step (4) at 115-160° C. until weight loss on drying is 5% by weight or less, or there is also including a step (5) of adding a water-compatible organic solvent or a mixed solvent of a water-compatible organic solvent and water to the cationized cellulose after the neutralization so that water content in a whole solvent that contacts the cationized cellulose is 10% by mass or less.
    Type: Application
    Filed: August 22, 2008
    Publication date: September 8, 2011
    Applicant: Lion Corporation
    Inventors: Youichirou Kohno, Yoko Osako, Atsushi Ito
  • Publication number: 20110173763
    Abstract: The invention provides a process for aminoarylating cellulosic materials such as cotton and reconstituted fibres and a process for treating the aminoarylated cellulose with an effect chemical such as a dye, flame retardant or cross linking agent. Improved take up of the effect chemical by the modified cellulose means increased efficiency in the process and in the case of dyeing, avoids or reduces the washing off of hydrolysed dye and the resultant production of large volumes of contaminated water requiring to be treated. The cellulosic material may be present in a blend with other types of fibre for example a blend with poly(alkyleneterephthalates) or polyamides.
    Type: Application
    Filed: January 26, 2009
    Publication date: July 21, 2011
    Inventors: Colin Robert Willis, Stuart Anson Brewer, John Anthony Taylor, Duncan Adrian Phillips
  • Publication number: 20110098463
    Abstract: A cellulose derivative obtained from cellulose by substitution of hydrocarbyl groups ranging in carbon number from 1 to 7 and aliphatic acyl groups ranging in carbon number from 4 to 11 for at least part of the hydrogen atoms of hydroxyl groups contained in the cellulose. The cellulose derivative can exhibit good thermal plasticity, strength, heat resistance and mold working suitability.
    Type: Application
    Filed: June 29, 2009
    Publication date: April 28, 2011
    Applicant: FUJIFILM CORPORATION
    Inventors: Toshihide Yoshitani, Yutaka Nozoe, Daisuke Sawai
  • Patent number: 7868164
    Abstract: A cellulose ether which has from 4,000 to 10,000 anhydroglucose repeat units and is substituted with (a) on the average from 0.0003 to 0.08 moles, per mole of anhydroglucose unit, of a substituent comprising an alkyl or arylalkyl group having from 8 to 24 carbon atoms and (b) a substituent having the formula II wherein R5, R6 and R7 each independently are —CH3 or —C2H5, R8 is —CH2—CHOH—CH2— or —CH2CH2, Az? is an anion, and z is 1, 2 or 3 is useful in hair and skin care compositions.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: January 11, 2011
    Inventors: Russell L. Kreeger, Shuiqin Zhou
  • Patent number: 7749317
    Abstract: A mixed polymer fiber, comprising a crosslinked polymer fiber comprising carboxyalkyl cellulose and a galactomannan polymer or a glucomannan polymer, and cellulose fiber.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: July 6, 2010
    Assignee: Weyerhaeuser NR Company
    Inventors: S. Ananda Weerawarna, Su Bing
  • Patent number: 7717995
    Abstract: A method for making mixed polymer composite fibers containing cellulose fibers in which cellulose fibers are dispersed in an aqueous solution comprising a carboxyalkyl cellulose and a galactomannan polymer or a glucomannan polymer in water to provide an aqueous fiber dispersion; the aqueous dispersion treated with a first crosslinking agent to provide a gel; the gel mixed with a water-miscible solvent to provide composite fibers; and the composite fibers treated with a second crosslinking agent to provide crosslinked fibers.
    Type: Grant
    Filed: October 2, 2006
    Date of Patent: May 18, 2010
    Assignee: Weyerhaeuser NR Company
    Inventors: S. Ananda Weerawarna, Bing Su
  • Patent number: 7591891
    Abstract: A method for making crosslinked fibers containing cellulose fibers in which an aqueous solution comprising a carboxyalkyl cellulose and a galactomannan polymer or a glucomannan polymer in water is treated with a first crosslinking agent to provide a gel; the gel mixed with a water-miscible solvent to provide mixed polymer fibers; cellulose fibers are added to the mixed polymer fibers; and these fibers are treated with a second crosslinking agent to provide crosslinked fibers.
    Type: Grant
    Filed: June 25, 2007
    Date of Patent: September 22, 2009
    Assignee: Weyerhaeuser NR Company
    Inventors: S. Ananda Weerawarna, Su Bing
  • Publication number: 20080281000
    Abstract: Novel cross-linked gels comprised of alkoxyetheramides grafted to polysaccharides that have superior viscosity properties have been made. By controlling the chain length of the alkoxyetheramides and the hydrophobic nature of the gel, these materials are ideal for many uses such as in hydraulic fracturing of oil-bearing geological formations, in the paint and dye industries, as dispersants, in personal care products and for carriers in controlled drug delivery.
    Type: Application
    Filed: September 6, 2006
    Publication date: November 13, 2008
    Inventors: William H. Daly, Ahmad A. Bahamdan
  • Publication number: 20080223536
    Abstract: The invention relates to paper comprising a filler and a cellulose ether wherein the cellulose ether comprises a quaternary ammonium group, with the proviso that the cellulose ether is not a hydroxyethyl cellulose.
    Type: Application
    Filed: December 21, 2004
    Publication date: September 18, 2008
    Applicant: ANZO NOBEL N.V.
    Inventor: Peter Marten Van Der Horst
  • Patent number: 7244840
    Abstract: A nonionic water-soluble cellulose ether is characterized in that when 3 pbw of the nonionic water-soluble cellulose ether is added to a mixture of 90 pbw of cordierite, 10 pbw of ordinary Portland cement, and 33 pbw of water, immediately followed by kneading at 20° C. and 20 rpm, a maximum torque for kneading is reached within 180 seconds from the addition. It is suitable as an admixture for extrudable hydraulic compositions. The hydraulic composition to which the inventive admixture is added can be kneaded within a brief time into a uniform mass which is smoothly extrudable.
    Type: Grant
    Filed: January 27, 2006
    Date of Patent: July 17, 2007
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Yoshiaki Sasage, Tsutomu Yamakawa
  • Patent number: 7151173
    Abstract: A nonionic water-soluble cellulose ether is characterized in that when 3 pbw of the nonionic water-soluble cellulose ether is added to a mixture of 90 pbw of cordierite, 10 pbw of ordinary Portland cement, and 33 pbw of water, immediately followed by kneading at 20° C. and 20 rpm, a maximum torque for kneading is reached within 180 seconds from the addition. It is suitable as an admixture for extrudable hydraulic compositions. The hydraulic composition to which the inventive admixture is added can be kneaded within a brief time into a uniform mass which is smoothly extrudable.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: December 19, 2006
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Yoshiaki Sasage, Tsutomu Yamakawa
  • Patent number: 7101426
    Abstract: An in situ ionic interaction between two additives, one a cationic strength enhancing additive and one an anionic crosslinking additive, is used to improve the mechanical properties of an article formed from a composite material. The composite has a discrete phase bound together with a film of the additives, such as gypsum crystals bound together by a film of substituted starch or cellulose ether.
    Type: Grant
    Filed: September 27, 2004
    Date of Patent: September 5, 2006
    Assignee: Innovative Construction and Building Materials, LLC
    Inventors: Christopher D. Tagge, Jacob Freas Pollock, Ken Saito
  • Patent number: 7095604
    Abstract: In an electric double-layer capacitor, a solution of a quaternary ammonium borofluoride compound in propylene carbonate is used as an electrolyte. The electrode includes alkali-activated carbon made using meso-phase pitch as a starting material, and a conductive filler having a rest potential smaller than that of the alkali-activated carbon in the electrolyte. The amount Fc of conductive filler incorporated in the electrode is set in a range of 10% by weight?Fc?40% by weight. Such electric double-layer capacitor has a large electrostatic capacity and excellent durability.
    Type: Grant
    Filed: August 27, 2004
    Date of Patent: August 22, 2006
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Minoru Noguchi, Manabu Iwaida, Naohiko Oki, Eisuke Komazawa, Takahiro Takeshita, Kenichi Murakami
  • 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: 6958314
    Abstract: A petro-chemical free nonionic surfactant is prepared by the alkylation of an alkyl polyglucoside (APG). Under suitable alkylation reaction conditions, the surfactants are preferably prepared by the reaction of an APG with either alkyl halide or an alkyl tosylate. These surfactants are low foaming and exhibit excellent detergency.
    Type: Grant
    Filed: March 5, 2003
    Date of Patent: October 25, 2005
    Assignee: Master Chemical Corporation
    Inventor: David B. McCall
  • Patent number: 6933381
    Abstract: Process for the production of polysaccharide ethers, e.g. cellulose ethers, are disclosed wherein salts formed during the process, e.g., sodium nitrate or sodium acetate, are converted to their corresponding acids and bases by means of an electric current, preferably in combination with a bipolar membrane and suitable catiion and/or anion membranes. The acids and bases recovered from the process can be recycled, thereby avoiding the need to provide for disposal of salts.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: August 23, 2005
    Inventors: Charles B. Mallon, John S. Vames, John I. Sarlis, Benito See, David M. Trampe, Rathin Datta
  • Patent number: 6872820
    Abstract: Finely divided polysacharide derivatives are described. The finely divided polysacharide derivatives are prepared by a process comprising: a) forming an aqueous composition comprising a polysaccharide derivative and water, in which the polysaccharide derivative is soaked or dissolved; b) converting the polysaccharide derivative of the aqueous composition into finely divided solid particles by, (i) contacting the aqueous composition with superheated water vapor in a dryer-pulverizer; or (ii) causing the polysaccharide derivative of the aqueous composition to flocculate; and c) optionally drying the finely divided solid particles of step b). The primary structures of the polysaccharide starting material are largely removed, and the product has a shape factor of less than 5 and greater than or equal to 1.
    Type: Grant
    Filed: October 1, 2001
    Date of Patent: March 29, 2005
    Assignee: Wolff Walsrode AG
    Inventors: Gunter Weber, Detmar Redeker, Bernd Klinksiek, Jürgen Hinderer, Benno Ulfik
  • Patent number: 6806364
    Abstract: An aqueous ophthalmic solution containing 0.2 to 2.5 percent by weight a polymeric demulcent, 0.045 to 0.065 percent by weight a calcium salt, and 0.14 to 1.4 percent by weight a phosphate salt. The solution has a viscosity of 20 to 150 centipoise and is buffered to a pH 5.5 to 8.5.
    Type: Grant
    Filed: July 29, 2002
    Date of Patent: October 19, 2004
    Assignees: AST Products, Inc., Ophthalmic Research Associates, Inc.
    Inventors: Shih-Horng Su, George W. Ousler, III
  • Publication number: 20040151681
    Abstract: The present invention relates to the use of a quaternary ammonium hydroxyethyl cellulose ether that comprises an ether substituent containing an alkyl group with 24 carbon atoms, preferably 2 carbon atoms, having a DSalkyl of 0.1-2.5, preferably 0.2-2.0 and most preferably 0.3-1.5, as a hair and skin conditioner. The cellulose ether exhibits an increased substantivity to hair, without showing any build-up after repetitive shampooing. Hair that has been treated with the above-mentioned cellulose ether also shows an improved wet combability. A hair or skin conditioning composition and a solid soap bar, as well as a certain cellulose ether and a process for its production are also disclosed.
    Type: Application
    Filed: March 24, 2004
    Publication date: August 5, 2004
    Inventors: Asa Busk, P.M. Van Der Horst, Holger Plate, Yonghua Tang
  • Patent number: 6602994
    Abstract: A method for producing derivatized microfibrillar polysaccharide, including but not limited to cellulose, derivatized by steric and/or electrostatic forces, where the electrostatic forces are provided by anionic charge or by a combination of both anionic and cationic charge, by stabilizing and/or microfibrillating a polysaccharide starting material. A method of modifying the rheological properties of a composition of matter using derivatized microfibrillar polysaccharide. Method of improving coatings, paper manufacture, and the stability of emulsions, dispersions, and foams using a derivatized microfibrillar polysaccharide. Compositions that include derivatized microfibrillar polysaccharide, including paper compositions, comestible compositions, non-comestible spreadable compositions, and emulsions, dispersion, and foams.
    Type: Grant
    Filed: February 10, 1999
    Date of Patent: August 5, 2003
    Assignee: Hercules Incorporated
    Inventors: Mary Jean Cash, Anita N. Chan, Herbert Thompson Conner, Patrick Joseph Cowan, Robert Alan Gelman, Kate Marritt Lusvardi, Samuel Anthony Thompson, Frank Peine Tise
  • Patent number: 6600033
    Abstract: The invention relates to a cellulose ether that is hydrophobically modified with an alkyl or alkenylketene dimer of general formula (I), in which R1 and R2 are alkyl or alkenyl chain, such as one having 5 to 22, preferably 13 to 20, most preferably 14 to 18 carbons. The product can be used in water-based products to control the rheological properties, for example. Objects of use include, for example, detergents, paper coating mixtures, paints, dispersing agents, and oil drilling muds.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: July 29, 2003
    Assignee: Metsa Specialty Chemicals Oy
    Inventors: Mikko Lähteenmäki, Heidi Känköhen, Göran Kloow, Oliver Ruppert, Jennifer Ann Leupin, Eugene Paul Gosselink
  • Patent number: 6569906
    Abstract: The invention concerns a composition capable of being hydrolyzed by a cutaneous enzyme, glucocerebrosidase. The active precursor is advantageously a gluco-conjugate derived from phenol whereof the two &agr; carbons are free. The invention also concerns the use of such compositions against light-induced skin ageing or for making a medicine for treating certain skin diseases. The invention further concerns novel glucosylated compounds.
    Type: Grant
    Filed: May 18, 2001
    Date of Patent: May 27, 2003
    Assignee: Pierre Fabre Dermo-Cosmetique
    Inventors: Daniel Redoules, Roger Tarroux, Jean-Jacques Perie
  • Patent number: 6562961
    Abstract: The invention relates to polysaccharide derivatives comprising a) at least one hydrophobic and b) at least one nitrogen-containing substituent; in particular, the derivative is a cellulose ether which, as substituent a), has a trialkylsilyl and, as substituent b), an aminoalkyl group. Furthermore, it relates to a process for immobilizing biomolecules on a coated sheet-like carrier material in which the biomolecules are attached at or in the coating and the coated sheet-like carrier material comprises within or outside the coating at least one such polysaccharide derivative. Additionally, in the process for preparing the mixed cellulose ether a solution of trialkylsilylcellulose in an organic solvent is admixed with a reactive aminoalkane derivative which is insoluble or only sparingly soluble in this solvent, the reaction is carried out and the end product is isolated.
    Type: Grant
    Filed: June 7, 2000
    Date of Patent: May 13, 2003
    Assignee: Molecular Machines & Industries GmbH
    Inventors: Stefan Seeger, Frank Loescher
  • Patent number: 6441057
    Abstract: The present invention discloses novel polymer compositions comprising cellulose acrylamide, acrylamide and/or a fluorescent indicator species, and membranes made with these compositions. Optical pH sensors for monitoring the pH in a fluid sample, and methods for making such pH sensors are also disclosed. The pH sensors have reduced sensitivity to sample components that can interfere with pH measurements.
    Type: Grant
    Filed: March 30, 2000
    Date of Patent: August 27, 2002
    Assignee: Optical Sensors Incorporated
    Inventors: Lynn M. Kimball, Laura J. Bauer, William V. Fowler, Laurie E. Lynch
  • Patent number: 6380381
    Abstract: The present invention provides low-substituted hydroxypropyl cellulose exhibiting good granulation characteristics and tablet properties. Specifically, there is provided low-substituted hydroxypropyl cellulose having a hydroxypropoxyl content in the range of 5.0 to 16.0% by weight and an apparent average degree of polymerization in the range of 350 to 700.
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: April 30, 2002
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventor: Sakae Obara
  • Patent number: 6369132
    Abstract: Fine particulate thermoplastic polymers [e.g., hydrophobically modified polyether-polyurethanes, polyacrylates, polyvinyl alcohol, polyether-polyols, polyacrylamide, aminoplast-polyethers and poly(acetal- or ketal-polyethers] having reduced bulk density, process of making same by dissolving the polymer and rapidly insolubilizing the polymer from the solution and process of using aqueous suspensions of such polymers as thickeners for aqueous systems.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: April 9, 2002
    Assignee: Hercules Incorporated
    Inventor: Arjun Chandra Sau
  • Publication number: 20020026992
    Abstract: A graft polymer comprises a carbohydrate polymer having pendant 3-amino-2-hydroxy propyl groups grafted thereon and may be employed as a retention aid and strengthening additive in paper manufacture. When the carbohydrate polymer is a component of wood pulp the resulting chemically modified wood pulp may be employed in conjunction with unmodified wood pulp to incorporate therein the retention and strengthening characteristics.
    Type: Application
    Filed: July 2, 2001
    Publication date: March 7, 2002
    Inventors: Miroslav Antal, Makhlouf Laleg, Ivan Ignac Pikulik
  • Publication number: 20010025101
    Abstract: The present invention relates to a new, particularly economical process for preparing particulate water-soluble cellulose derivatives. The process involves forming a feed composition of swollen and/or dissolved cellulose derivative, and water. The feed composition is contacted with a superheated gas mixture, in a sieve-free high rotational speed gas jet impact mill, and the cellulose derivative of the feed composition is converted into a solid state form of finely particulate particles. The superheated gas mixture, with which the feed composition is contacted, is selected from: (i) a superheated gaseous mixture of steam and an inert gas; and (ii) a superheated gas mixture of steam and air. The superheated gas mixture has a steam content of 40 wt. % to 99 wt. %, based on the total weight of the superheated gas mixture.
    Type: Application
    Filed: February 16, 2001
    Publication date: September 27, 2001
    Inventors: Hartwig Schlesiger, Martin Morning, Gunter Weber, Volker Eckhardt, Gerd Sonnenberg, Rene Kiesewetter
  • Patent number: 6265570
    Abstract: Stable, cold water soluble, ready for use starch aldehyde compositions and the method of preparation of such compositions wherein an aqueous dispersion of a converted starch acetal is hydrolyzed under acidic conditions to form the starch aldehyde which is then spray dried into a cold water soluble starch aldehyde powder.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: July 24, 2001
    Assignee: National Starch & Chemical Investment Holding Corporation
    Inventors: A. Levent Cimecioglu, Bjork Ohlhorst, Daniel B. Solarek, Douglas J. Slate, James L. Eden
  • Patent number: 6184272
    Abstract: A fiber-reinforced molded plastic part, a process for its manufacture and a use. The fiber-reinforced molded plastic part consists of a plastic matrix with natural fibers particularly arranged in a uniformly distributed manner in the plastic matrix. The plastic matrix has at least two mutually mixed polymers, of which one is a biopolymer and the other is a polymer which is at least largely resistant to biological stress.
    Type: Grant
    Filed: February 12, 1998
    Date of Patent: February 6, 2001
    Assignee: DiamlerChrysler AG
    Inventors: Thomas Foelster, Ralph Greiner, Dirk Schaefer