Acetates Patents (Class 536/69)
  • Patent number: 11326033
    Abstract: The disclosure provides a method to optimize atomic layer deposition comprising the following steps: (A) providing a cellulose nanofiber; (B) acidifying the cellulose nanofiber by an acidifying treatment agent; (C) hydrophobing the acidified cellulose nanofiber by a hydrophobinghydrophobic treatment agent; (D) dissolving the acidified and hydrophobed cellulose nanofiber in a solvent to form a cellulose nanofiber solution; (E) coating the cellulose nanofiber solution on a silicone resin film; (F) heating the coated silicone resin film to form a cellulose nanofiber layer on a surface of the silicone resin film; and (G) forming an inorganic coating layer on the surface of the silicone resin film having the cellulose nanofiber layer by atomic layer deposition.
    Type: Grant
    Filed: February 26, 2020
    Date of Patent: May 10, 2022
    Assignee: BenQ Materials Corporation
    Inventors: Shih-Chieh Teng, Ju-Hui Huang
  • Patent number: 10982011
    Abstract: The present invention describes a process for the acetylation of wood comprising treating wood with an acetylation agent comprising acetic anhydride and/or acetic acid and subjecting to acetylation conditions, wherein the acetylation reaction is carried out in the presence of an acetylation catalyst comprising a salt of an organic acid, wherein the organic acid is a carboxylic acid, phenol or a substituted phenol, wherein the carboxylic acid is chosen from the list consisting of aromatic carboxylic acids, medium chain saturated monocarboxylic acids, keto acids, dicarboxylic acids, tricarboxylic acids, hydroxy acids, amino acids and derivatives thereof.
    Type: Grant
    Filed: May 20, 2015
    Date of Patent: April 20, 2021
    Assignee: TITAN WOOD LIMITED
    Inventors: Stefan Van Dommele, Bernardus Jozef Maria Pol
  • Patent number: 10889916
    Abstract: Provided are a cellulose acetate fiber and a cellulose acetate fiber molded article which are excellent in water solubility and biodegradability and are small in load onto the natural environment even when allowed to stand still in the environment. The invention provides a cellulose acetate fiber containing cellulose acetate having a total degree of acetyl substitution of 0.4 to 1.3 and a compositional distribution index (CDI) of 2.0 or less as well as a cellulose acetate fiber molded article.
    Type: Grant
    Filed: January 15, 2014
    Date of Patent: January 12, 2021
    Assignee: DAICEL CORPORATION
    Inventors: Shu Shimamoto, Shizuka Okada, Hiroki Taniguchi, Toshikazu Nakamura
  • Patent number: 10875932
    Abstract: Provided is a cellulose acetate powder that makes it possible to reduce the formation of spotty patches on a formed article of the cellulose acetate and prevent lowering of the production process passability of the formed article. A cellulose acetate powder includes cellulose acetate having an acetylation degree of 53 to 56% and a 6% viscosity of 30 to 200 mPa·s. In the cellulose acetate powder, a cumulative pore volume is not less than 0.200 ml/g; a proportion of particles having a particle diameter of not less than 500 ?m is not higher than 40%; and an angle of repose is not greater than 51°.
    Type: Grant
    Filed: February 26, 2015
    Date of Patent: December 29, 2020
    Assignee: DAICEL CORPORATION
    Inventors: Akihiro Higuchi, Takehiro Matsumoto
  • Patent number: 10214855
    Abstract: Method for making modified cellulose products comprises —processing cellulose pulp to modified cellulose pulp at a manufacturing location to increase the susceptibility of fibers to disintegration, —setting the modified cellulose pulp to a suitable dry matter content, and —transporting the modified cellulose pulp at set dry matter content to a location of use, where the modified cellulose pulp is disintegrated to nanofibrillar cellulose.
    Type: Grant
    Filed: December 4, 2014
    Date of Patent: February 26, 2019
    Assignee: UPM-KYMMENE CORPORATION
    Inventors: Isko Kajanto, Juha Tamper, Markus Nuopponen, Tarja Sinkko, Taisto Tienvieri
  • Patent number: 9079978
    Abstract: The invention relates to a method of treating chemical pulp fibers by a polymerizing hydroxy acid, the fibers thus obtained and the products refined from them. In the method, the hydroxy acid reacts with the reactive groups of the fibers in the presence of a catalyst, forming ester bonds. The following units of the same hydroxy acid are oligomerized and/or polymerized to these grafted acid residues. The fibers thus treated and the products refined thereof endure better processing stages that include drawing and stretching than untreated fibers.
    Type: Grant
    Filed: March 18, 2010
    Date of Patent: July 14, 2015
    Assignee: STORA ENSO OYJ
    Inventors: Jari Räsänen, Tapani Penttinen, Ali Harlin, Jaakko Hiltunen, Hanne Wikberg, Tekla Tammelin
  • Publication number: 20150141639
    Abstract: A process for producing a cellulose derivative, including reacting a reactant and a cellulose or a derivative thereof in a solid-liquid heterogeneous system to form a cellulose derivative containing a long-chain organic group having 5 or more carbon atoms introduced therein, in a swollen state, and performing solid-liquid separation to obtain the cellulose derivative containing a long-chain organic group introduced therein.
    Type: Application
    Filed: May 31, 2013
    Publication date: May 21, 2015
    Inventors: Kiyohiko Toyama, Massatoshi Iji, Shukichi Tanaka
  • Patent number: 9000148
    Abstract: Flame retardant cellulose acetate is prepared comprising cellulose acetate flakes and an organophosphate compound bonded to the cellulose acetate flakes. Accordingly, the bonded phosphate-functional group provides the cellulose acetate flakes with pendant phosphate ester functionality. Numerous phosphate derivatives can be envisaged that will accomplish the intended task.
    Type: Grant
    Filed: January 4, 2013
    Date of Patent: April 7, 2015
    Assignee: International Business Machines Corporation
    Inventors: Dylan J. Boday, Joseph Kuczynski
  • Publication number: 20150093550
    Abstract: Solution casting a nanostructure. Preparing a template by ablating nanoholes in a substrate using single-femtosecond laser machining. Replicating the nanoholes by applying a solution of a polymer and a solvent into the template. After the solvent has substantially dissipated, removing the replica from the substrate.
    Type: Application
    Filed: December 4, 2014
    Publication date: April 2, 2015
    Inventors: William Hudson Hofmeister, Alexander Yuryevich Terekhov, Jose Lino Vasconcelos de Costa, Kathleen Stacia Lansford, Deepak Rajput, Lloyd M. Davis
  • Publication number: 20140323714
    Abstract: The invention relates to a method for manufacturing cellulose material, the method comprising introducing cellulose fibers as raw material pulp (1) to a system, adding an alkalizing agent into the system in order to absorb the alkalizing agent into the cellulose fibers (1), adding an anionic agent into the system in order to absorb said agent into the cellulose 2, 2a, 2b fibers (1), feeding the cellulose fibers (1) to a sieve plate press (6), performing a reaction between the cellulose fibers and the anionic agent at least partly in the sieve plate press (6) in order to produce anionized cellulose fibers having a degree of substitution between 0.05 and 0.35, wherein the reaction is performed at least partly at a consistency of at least 50%. In addition, the invention relates to a system for manufacturing cellulose material and to fibril cellulose produced from anionized cellulose fibers.
    Type: Application
    Filed: November 23, 2012
    Publication date: October 30, 2014
    Applicant: UPM-KYMMENE Corporation
    Inventors: Eino Sivonen, Kyösti Valta, Markus Nuopponen
  • Publication number: 20140311381
    Abstract: Provided is a cellulose acylate film for an optical film usable for optical compensation sheet, an optical filter for stereoscopic images, a polarizer and a liquid crystal display and the like.
    Type: Application
    Filed: March 7, 2014
    Publication date: October 23, 2014
    Applicant: SK Innovation Co., Ltd.
    Inventors: Hyo Shin Kwak, Min Joung Im, Seung Eon Lee, Tae Sug Jang, Myoung Lae Kim, Yong Gyun Cho, Won Yeob Kim, Min Sang Park
  • Publication number: 20140296464
    Abstract: The present invention provides a chromatography medium comprising one or more electrospun polymer nanofibres which form a stationary phase comprising a plurality of pores through which a mobile phase can permeate and use of the same in chromatography, such as the isolation of recombinant proteins, monoclonal antibodies, viral vaccines and plasmid DNA. The invention further provides for the use of the chromatographic medium in a simulated moving bed system.
    Type: Application
    Filed: November 7, 2012
    Publication date: October 2, 2014
    Applicant: UCL BUSINESS PLC
    Inventors: Daniel Gilbert Bracewell, Robert Stevens, Oliver Hardick
  • Patent number: 8846900
    Abstract: To provide a cellulose acetate which gives a cellulose acetate optical film exhibiting optical properties as a result of stretching, in which the film shows excellent stretchability and gives a stretched film having excellent optical properties. Disclosed is a cellulose diacetate for a retardation film, having a total degree of acetyl substitution of from 2.27 to 2.56, in which the cellulose diacetate has a polydispersity Mw/Mn of more than 3.0 and 7.5 or less, a degree of substitution at the 6-position of from 0.65 to 0.85, a half height width of acetylation distribution of from 1.0 to 2.3, and a viscosity-average degree of polymerization of 182 or more and 213 or less. The cellulose diacetate for a retardation film preferably has a 6-percent viscosity of from 120 to 230 mPa·s and preferably has a weight-average molecular weight Mw of 205,000 or more and 235,000 or less.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: September 30, 2014
    Assignee: Daicel Corporation
    Inventors: Shu Shimamoto, Yuya Asumi
  • Publication number: 20140275516
    Abstract: Mixed cellulose esters derived from natural products (e.g., natural cellulose esters) may be produced by methods that include acylating a cellulose with a natural esterification reactant or a derivative thereof to yield a natural cellulose ester. In some instances, the natural esterification reactant derivative may be a saponified natural esterification reactant. In some instances, the natural cellulose esters may have a glass transition temperature of about ?55° C. to about 170° C.
    Type: Application
    Filed: March 12, 2014
    Publication date: September 18, 2014
    Applicant: Celanese Acetate LLC
    Inventors: Michael Combs, Wendy Bisset, Jonathan S. Lockhart
  • Publication number: 20140249235
    Abstract: The presently disclosed and claimed inventive concept(s) relates to a polymer for enhancing drug performance and improving processability. Specifically, the polymer comprises hydroxypropyl methyl cellulose acetate succinate (HPMC-AS). On the HPMC-AS, the percentage of total succinoyl degree of substitution is less than 12% at C6-OH position and greater than 53% at C3-OH, and the percentage of total acetyl degree of substitution is greater than 32% at C6-OH position.
    Type: Application
    Filed: February 21, 2014
    Publication date: September 4, 2014
    Applicant: HERCULES INCORPORATED
    Inventors: Todd A. Brugel, Tuyen T. Nguyen, Sangrama Sahoo, Divya Tewari, Yuda Zong
  • Patent number: 8735572
    Abstract: The present inventions relate to cellulose esters having low hydroxyl content for use in optical applications, such as liquid crystal display (LCD) films. Films with low hydroxyl levels and a given ratio of non-acetyl ester to hydroxyl level have low intrinsic birefringence. These films can be cast, molded, or otherwise oriented without an appreciable birefringence or optical distortion (i.e. retardation). These films are useful in polarizer, protective, and compensator films and in molded optical parts, such as lenses. The resins of the present inventions can also be made to have “+C plate” behavior either by melt or solvent based processing, which is uncharacteristic of cellulose esters. Such +C behavior allows films having unique compensatory behavior. Other embodiments of the invention relate to methods of melt casting films while minimizing birefringence. Another embodiment of the invention is directed to films made from the cellulose esters described herein further comprising a plasticizer.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: May 27, 2014
    Assignee: Eastman Chemical Company
    Inventors: Marcus David Shelby, Michael Eugene Donelson, Bradley Howard Dayvolt, Alan Kent Wilson, Bryan Kirkman
  • Patent number: 8710214
    Abstract: The present invention relates to cellulose esters having low hydroxyl content for use in optical applications, such as liquid crystal display (LCD) films. Films made with low hydroxyl levels and a given ratio of non-acetyl ester to hydroxyl level have been found to have low intrinsic birefringence. These films can be cast, molded, or otherwise oriented without an appreciable birefringence or optical distortion (i.e. retardation). Such features make these films useful in polarizer, protective, and compensator films as well as molded optical parts, such as lenses. Furthermore, it has also been found that resins of the present invention can also be made to have “+C plate” behavior either by melt or solvent based processing, a characteristic which is not typical of cellulose esters. Such +C behavior allows films to be produced having unique compensatory behavior. Other embodiments of the invention relate to methods melt casting films while minimizing birefringence formation.
    Type: Grant
    Filed: December 10, 2009
    Date of Patent: April 29, 2014
    Assignee: Eastman Chemical Company
    Inventors: Marcus David Shelby, Michael Eugene Donelson, Bradley Howard Dayvolt, Alan Kent Wilson, Bryan Scott Kirkman
  • Publication number: 20140073776
    Abstract: Cellulose nanofibers have an average degree of polymerization of 600 or more to 30000 or less, an aspect ratio of 20 or more to 10000 or less, an average diameter of 1 nm or more to 800 nm or less, and an I?-type crystal peak in an X-ray diffraction pattern, in which a hydroxyl group in the cellulose nanofibers is esterified and has a modification degree of 1.0 or more based on all of the hydroxyl groups.
    Type: Application
    Filed: November 15, 2013
    Publication date: March 13, 2014
    Applicant: Olympus Corporation
    Inventors: KOHEI SHIRAMIZU, Lianzhen Lin
  • Publication number: 20140018530
    Abstract: A cellulose resin produced by binding a hydrogenated cardanol containing 3-pentadecylcyclohexanol, and cellulose or a derivative thereof through the reaction between a hydroxy group of the hydrogenated cardanol, a hydroxy group of the cellulose or a derivative thereof and isocyanate groups of a diisocyanate compound.
    Type: Application
    Filed: March 27, 2012
    Publication date: January 16, 2014
    Applicant: NEC Corporation
    Inventors: Shukichi Tanaka, Sungil Moon, Masatoshi Iji
  • Publication number: 20130338250
    Abstract: The present invention relates to cellulose fibers wherein a part of the hydroxyl groups of the cellulose have been substituted with at least one of a carboxy group and formyl group of 0.1 mmol/g or larger based on the weight of the cellulose fibers, and have been further substituted with a chemical modification group other than the carboxy and formyl groups.
    Type: Application
    Filed: August 21, 2013
    Publication date: December 19, 2013
    Applicants: OJI HOLDINGS CORPORATION, MITSUBISHI CHEMICAL CORPORATION
    Inventors: Tomokazu UMEMOTO, Naohide Ogita, Takanori Shimizu, Yasutomo Noishiki, Hiroyuki Nagatani, Go Banzashi
  • Publication number: 20130327701
    Abstract: A separation membrane including a polymer having a structural unit represented by the following Chemical Formula 1, and a water treatment device including a separation membrane, are useful for desalination.
    Type: Application
    Filed: June 7, 2013
    Publication date: December 12, 2013
    Applicant: IUCF-HYU (Industry-university Cooperation Foundation Hanyang University)
    Inventors: Jung Im HAN, Sung Soo HAN, Soon Chul KWON, Ho-Bum PARK, Young Hoon CHO
  • Publication number: 20130324710
    Abstract: There is disclosed a process for the derivatization of cellulose comprising the sequential steps: a) mixing cellulose with a viscosity below 900 ml/g with an aqueous solution to obtain a liquid, wherein particles comprising cellulose in said liquid have a diameter of maximum 200 nm, wherein the temperature of the aqueous solution is below 20° C., and wherein the pH of the aqueous solution is above 12, b) subjecting the liquid to at least one of the steps: i) decreasing the pH of the liquid with at least 1 pH unit, ii) increasing the temperature by at least 20° C., and c) derivatization of the cellulose. Advantages include that there is provided the possibility to derivatize cellulose faster and to a greater extent after the treatment. Further the yield is improved. The product quality is improved and the manufacture is cheaper and easier.
    Type: Application
    Filed: October 26, 2011
    Publication date: December 5, 2013
    Applicant: HELI INOVATIO HANDELSBOLAG
    Inventors: Gunnar Henriksson, Mikael Lindstrom
  • Patent number: 8597551
    Abstract: Provided is an optical film using a cellulose derivative, which is used in image display devices such as liquid-crystal display devices. A liquid-crystal display device with a polarizing plate using the optical film has an excellent viewing angle property. More particularly, the present invention relates to an optical film made of a cellulose ester resin, a portion of hydrogen atoms of hydroxyl groups of which is substituted with two or more substituent groups.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: December 3, 2013
    Assignee: SK Innovation Co., Ltd.
    Inventors: Kiyup Kim, Yonggyun Cho, Sangyeup Lee, Wonyeob Kim, Wonseok Jang, Myounglae Kim
  • Patent number: 8545737
    Abstract: Disclosed are a cellulose acetate film characterized by comprising cellulose acetate that has a degree of acetylation of 51.0-56.0% and a compound represented by Formula (1) and having a total average degree of substitution of 6.1-6.9, a polarizing plate capable of maintaining excellent visibility, and a liquid crystal display device having excellent visibility and viewing angle characteristics. (In Formula (1), R1 to R8 may be the same or different and each represents an (un)substituted alkylcarbonyl or an (un)substituted aryl carbonyl).
    Type: Grant
    Filed: May 25, 2010
    Date of Patent: October 1, 2013
    Assignee: Konica Minolta Opto, Inc.
    Inventor: Yuki Kaneko
  • Publication number: 20130253182
    Abstract: A polymer film that has an in-plane retardation Re(?) and a thickness-direction retardation Rth(?) satisfying formula (i) and (ii), and that further has a surface energy of at least one surface is from 50 mN/m to 80 mN/m: 0?Re(630)?10, and |Rth(630)|?25;??(i) and |Re(400)?Re(700)|?10, and |Rth(400)?Rth(700)|?35.??(ii) in the formulae, Re(?) and Rth(?) are measurement values at the wavelength of ? nm, and an optically-compensatory film, an optical material such as a polarizer and a liquid-crystal display device using the polymer film.
    Type: Application
    Filed: May 9, 2013
    Publication date: September 26, 2013
    Inventors: Tadashi OMATSU, Hajime Nakayama, Akihiro Matsufuji, Osamu Takahashi, Shigeaki Nimura, Yousuke Nishiura
  • Publication number: 20130203982
    Abstract: This invention provides cellulose ester interpolymers, and methods of oxidizing cellulose interpolymers and cellulose ester interpolymers. The invention also provides routes to access carboxylated cellulose ester derivatives with high acid numbers wherein the carboxyl group is attached directly to the cellulose backbone by a carbon-carbon bond. Through functionalization of an intermediate aldehyde, the corresponding cationic or zwitterionic cellulose ester derivatives can also be accessed. The interpolymers of the present invention have a number of end-use applications, for example, as binder resins in various types of coating compositions and as drug delivery agents.
    Type: Application
    Filed: December 27, 2012
    Publication date: August 8, 2013
    Applicant: Eastman Chemical Company
    Inventor: Eastman Chemical Company
  • Publication number: 20130195960
    Abstract: The present invention relates to substituted cellulose acetates and methods of use thereof. One embodiment of the present invention provides a diaper having an inner layer having an absorbent core having a substituted cellulose acetate having a polar substituent that has an oxygen atom covalently bonded to a nonmetal selected from the group of sulfur, phosphorus, boron, and chlorine; wherein the nonmetal is present in at least about 0.01% by weight of the substituted cellulose acetate; and an outer layer.
    Type: Application
    Filed: January 27, 2012
    Publication date: August 1, 2013
    Applicant: Celanese Acetate LLC
    Inventors: Michael T. Combs, Thomas S. Garrett
  • Publication number: 20130178614
    Abstract: Embodiments of the invention provide regioselectively substituted carbohydrate and polysaccharide derivatives, such as cellulose esters, and methods for preparing them. Particular methods of the invention include deacylation of esters using tetrabutylammonium fluoride to obtain selective substitution at desired hydroxyl position(s) of the ester. Preferred is deacylation of an ester, which shows selectivity for removal of acyl groups from the ester of the secondary alcohols at C-2 and C-3, and which affords cellulose-6-O-esters with high regioselectivity by a simple one-step process employing no protective groups. Inventive regioselectively substituted cellulose esters can be prepared by such methods to obtain esters with the following anhydroglucose repeating units: wherein R1, R2, and R3 are each independently chosen from a hydrogen atom, and, whether substituted or unsubstituted, branched or unbranched, an alkanoyl group, an aroyl group, and a heteroaroyl group.
    Type: Application
    Filed: October 25, 2012
    Publication date: July 11, 2013
    Applicant: Virginia Tech Intellectual Properties, Inc.
    Inventor: Virginia Tech Intellectual Properties, Inc.
  • Publication number: 20130150463
    Abstract: The present invention relates to a particulate water-soluble polymeric polyol that is treated with a compound represented by formula (I), CR1?(OR2)4-x (I) wherein R1 is selected from hydrogen, a C1-C20 alkyl group and an aryl group, R2 is independently at each occurrence selected from a C1-C20 alkyl group and an aryl group, and x is selected from the integer 0 and 1; or with a combination of said compounds, to a method for treating a particulate water-soluble polymeric polyol with the above compound and to a method for the preparation of an aqueous solution of the treated particulate water-soluble polymeric polyol.
    Type: Application
    Filed: June 8, 2010
    Publication date: June 13, 2013
    Applicant: DOW GLOBAL TECHNOLOGIES LLC
    Inventors: Meinolf Brackhagen, Charles B. Mallon, Emmett M. Partain, Hans-Peter Schneider, Eric P. Wasserman
  • Patent number: 8455637
    Abstract: A process for adjusting an intermolecular or intramolecular degree of acetyl substitution of cellulose acetate is disclosed. The process comprises ripening cellulose acetate in the presence of a catalyst, an acetyl donor, and water or an alcohol. The amount of water and the alcohol is in the range of 0.1 to 10 mol % based on the amount of the acetyl donor.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: June 4, 2013
    Assignee: Daicel Chemical Industries, Ltd.
    Inventors: Tohru Shibata, Yuichiro Shuto, Masaaki Ito, Tanemi Asai
  • Publication number: 20130116424
    Abstract: A method for utilizing biomass components, namely cellulose, hemicellose, and lignin, and converting them to value-added biobased chemical products is described herein. The present method provides treatments to obtain a plurality of component streams from biomass for producing derivative products while minimizing waste products.
    Type: Application
    Filed: November 9, 2011
    Publication date: May 9, 2013
    Applicant: Thesis Chemistry, LLC
    Inventors: John R. Peterson, Christopher M. Yost, Jian Wu
  • Publication number: 20130096296
    Abstract: Instilling an acidic catalyst to a reaction mixture can be beneficial during the acylation of cellulose. Methods described herein can comprise preparing a reaction mixture comprising an acylating agent and cellulose, instilling a catalyst comprising an acid to the reaction mixture, and reacting the cellulose with the acylating agent in the presence of the catalyst, thereby forming an acylated cellulose.
    Type: Application
    Filed: October 14, 2011
    Publication date: April 18, 2013
    Applicant: Celanese Acetate LLC
    Inventors: Michael T. Combs, Thomas S. Garrett
  • Publication number: 20130096298
    Abstract: Instilling an acidic catalyst to a reaction mixture can be beneficial during the acylation of cellulose. Methods described herein can comprise preparing a reaction mixture comprising an acylating agent and cellulose, instilling a catalyst comprising an acid to the reaction mixture at an overall catalyst loading level of about 10% to about 20% by weight of the cellulose, and reacting the cellulose with the acylating agent in the presence of the catalyst, thereby forming an acylated cellulose.
    Type: Application
    Filed: October 14, 2011
    Publication date: April 18, 2013
    Applicant: Celanese Acetate LLC
    Inventors: Michael T. Combs, Thomas S. Garrett
  • Publication number: 20130096297
    Abstract: Instilling an acidic catalyst to a reaction mixture can be beneficial during the acylation of cellulose. Methods described herein can comprise preparing a reaction mixture comprising an acylating agent and cellulose, instilling a catalyst comprising an acid to the reaction mixture at an overall catalyst loading level of about 1% or less by weight of the cellulose, and reacting the cellulose with the acylating agent in the presence of the catalyst, thereby forming an acylated cellulose.
    Type: Application
    Filed: October 14, 2011
    Publication date: April 18, 2013
    Applicant: Celanese Acetate LLC
    Inventors: Michael T. Combs, Thomas S. Garrett
  • Patent number: 8354525
    Abstract: This invention relates to novel compositions comprising regioselectively substituted cellulose esters. One aspect of the invention relates to processes for preparing regioselectively substituted cellulose esters from cellulose dissolved in ionic liquids. Another aspect of the invention relates to the utility of regioselectively substituted cellulose esters in applications such as protective and compensation films for liquid crystalline displays.
    Type: Grant
    Filed: August 12, 2009
    Date of Patent: January 15, 2013
    Assignee: Eastman Chemical Company
    Inventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Michael Eugene Donelson, Maryna Grigorievna Gorbunova, Thauming Kuo, Bin Wang
  • Publication number: 20120325737
    Abstract: A polymer or polymer composite membrane having through-thickness micropores and a method of preparing the same are provided. More particularly, a polymer or polymer composite membrane having a pore structure such that micropores are aligned in a mesh structure in the thickness direction of the polymer or polymer composite membrane due to unidirectional freezing in the thickness direction of a solvent. The membrane has through-thickness micropores, and thus has improved permeability in the thickness direction and superior uniformity in size of the micropores and wall thickness between the micropores. For these reasons, the membrane can be used for a porous membrane substrate, microfiltration membrane, etc.
    Type: Application
    Filed: November 30, 2010
    Publication date: December 27, 2012
    Inventors: Jong Hwi Lee, Min Kyung Lee
  • Publication number: 20120258296
    Abstract: An optical film formed of a cellulose acylate and having a first region and a second region that differ from each other in the birefringence, wherein the angle between the slow axis of the first region and the slow axis of the second region is at least 45 degrees can be produced at a low cost and used for 3D stereoscopic image display.
    Type: Application
    Filed: December 24, 2010
    Publication date: October 11, 2012
    Applicant: FUJIFILM CORPORATION
    Inventor: Shigeaki Nimura
  • Publication number: 20120248390
    Abstract: A polarizer protective film containing a cellulose acylate of such that when two polarizers are arranged on both sides of the film so as to block a transmitted light from running through the film and when the film is irradiated with a light on one side thereof and observed with an optical microscope where the object lens has 10 magnifications and the eye lens has 10 magnifications, on the opposite side thereof, the number of the bright spots existing therein and having a diameter of from 0.1 ?m to less than 10 ?m is at most 500/cm2.
    Type: Application
    Filed: March 19, 2012
    Publication date: October 4, 2012
    Applicant: FUJIFILM CORPORATION
    Inventors: Yuki MATSUDA, Jun TAKEDA, Masato MORITA
  • Patent number: 8277554
    Abstract: The invention relates to a hot melt adhesive, comprising at least one polysaccharide ester gained by a reaction of a polysaccharide with an imidazolide in melted imidazole. The invention relates, further, to a process for producing the hot melt adhesive, in which imidazole is melted, and an acid chloride and/or an acid anhydride and/or a lactone is reacted in and with the melted imidazole to form an imidazolide, whereby at least one polysaccharide is added to the melted imidazole, whereby the polysaccharide is reacted with the imidazolide to form a polysaccharide ester.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: October 2, 2012
    Assignees: Innovent e.V., Friedrich-Schiller-Universitat
    Inventors: Bernd Grünler, Andreas Heft, Marion Homuth, Thomas Heinze, Tim Liebert
  • Patent number: 8273872
    Abstract: Ionic liquids and cellulose ester compositions and processes for producing ionic liquids and cellulose esters. Cellulose esters can be produced by esterifying cellulose in a reaction medium comprising one or more halide ionic liquids and at least one binary component. Cellulose esters prepared via the methods of the present invention can have a degree of substitution (“DS”) of at least 1.5 and can comprise a plurality of ester substituents, where at least 50 percent of the ester substituents comprise alkyl esters having a carbon chain length of at least 6 carbons.
    Type: Grant
    Filed: August 25, 2011
    Date of Patent: September 25, 2012
    Assignee: Eastman Chemical Company
    Inventors: Charles Michael Buchanan, Norma Lindsey Buchanan
  • Publication number: 20120202984
    Abstract: Ionic liquids and cellulose ester compositions and processes for producing ionic liquids and cellulose esters. Cellulose esters can be produced by esterifying cellulose in a reaction medium comprising one or more ionic liquids. Cellulose esters prepared via the methods of the present invention can be contacted with at least one bleaching agent to produce bleached cellulose esters having a ?E value of less than 30.
    Type: Application
    Filed: April 18, 2012
    Publication date: August 9, 2012
    Applicant: EASTMAN CHEMICAL COMPANY
    Inventors: Charles Michael Buchanan, Norma Lindsey Buchanan
  • Publication number: 20120183810
    Abstract: The present invention provides a compound represented by the Formula I: Wherein substituents R16, R17 and R17? are each independently selected from an electron withdrawing group having a Hammett ?p value of from 0.05 to 0.85, provided that one of R16 and R17 is hydrogen.
    Type: Application
    Filed: October 5, 2011
    Publication date: July 19, 2012
    Applicant: TRANSITIONS OPTICAL, INC.
    Inventor: Anu Chopra
  • Publication number: 20120172585
    Abstract: To provide a cellulose acetate which gives a cellulose acetate optical film exhibiting optical properties as a result of stretching, in which the film shows excellent stretchability and gives a stretched film having excellent optical properties. Disclosed is a cellulose diacetate for a retardation film, having a total degree of acetyl substitution of from 2.27 to 2.56, in which the cellulose diacetate has a polydispersity Mw/Mn of more than 3.0 and 7.5 or less, a degree of substitution at the 6-position of from 0.65 to 0.85, a half height width of acetylation distribution of from 1.0 to 2.3, and a viscosity-average degree of polymerization of 182 or more and 213 or less. The cellulose diacetate for a retardation film preferably has a 6-percent viscosity of from 120 to 230 mPa·s and preferably has a weight-average molecular weight Mw of 205,000 or more and 235,000 or less.
    Type: Application
    Filed: January 21, 2011
    Publication date: July 5, 2012
    Inventors: Shu Shimamoto, Yuya Asumi
  • Patent number: 8211680
    Abstract: A method is presented for the production of cellulosic ethanol, acetic acid and derivatives from the extract containing fibers and hemicelluloses after steam cooking of biomass in a host plant. The process is integrated with the host plant process to minimize the effect of loss of heat value from the extracted hemicelluloses and eliminate the need for the waste water treatment plant.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: July 3, 2012
    Assignee: API Intellectual Property Holdings, LLC
    Inventors: Theodora Retsina, Vesa Pylkkanen, Kimberley Nelson
  • Publication number: 20120165517
    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: Application
    Filed: August 11, 2010
    Publication date: June 28, 2012
    Applicant: FUJIFILM Corporation
    Inventors: Shigeki Uehira, Youichirou Takeshima
  • Publication number: 20120161086
    Abstract: Provided is an optical film using a cellulose derivative, which is used in image display devices such as liquid-crystal display devices. A liquid-crystal display device with a polarizing plate using the optical film has an excellent viewing angle property. More particularly, the present invention relates to an optical film made of a cellulose ester resin, a portion of hydrogen atoms of hydroxyl groups of which is substituted with two or more substituent groups.
    Type: Application
    Filed: December 22, 2011
    Publication date: June 28, 2012
    Applicant: SK INNOVATION CO., LTD.
    Inventors: Kiyup Kim, Yonggyun Cho, Sangyeup Lee, Wonyeob Kim, Wonseok Jang, Myounglae Kim
  • Publication number: 20120119169
    Abstract: Disclosed are a cellulose acetate film characterized by comprising cellulose acetate that has a degree of acetylation of 51.0-56.0% and a compound represented by Formula (1) and having a total average degree of substitution of 6.1-6.9, a polarizing plate capable of maintaining excellent visibility, and a liquid crystal display device having excellent visibility and viewing angle characteristics. (In Formula (1), R1 to R8 may be the same or different and each represents an (un)substituted alkylcarbonyl or an (un)substituted aryl carbonyl).
    Type: Application
    Filed: May 25, 2010
    Publication date: May 17, 2012
    Applicant: KONICA MINOLTA OPTO, INC.
    Inventor: Yuki Kaneko
  • Publication number: 20120095207
    Abstract: Ionic liquids and cellulose ester compositions and processes and apparatus for producing ionic liquids and cellulose esters. Cellulose esters can be produced by dissolving cellulose in carboxylated ionic liquids and thereafter contacting the cellulose solution with at least one acylating reagent. Cellulose esters produced via the present invention can comprise ester groups that originate from the carboxylated ionic liquid and/or the acylating reagent.
    Type: Application
    Filed: December 20, 2011
    Publication date: April 19, 2012
    Applicant: EASTMAN CHEMICAL COMPANY
    Inventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Robert Thomas Hembre, Juanelle Little Lambert
  • Patent number: 8153782
    Abstract: Processes for recycling an ionic liquid comprising employing an initial ionic liquid as a solvent and/or reagent resulting in a modified ionic liquid and thereafter subjecting at least a portion of the modified ionic liquid to at least one anion exchange process to produce a reformed ionic liquid. The initial ionic liquid can be employed in a cellulose esterification process, thereby producing the modified ionic liquid. At least a portion of the reformed ionic liquid can be recycled to a point upstream in the cellulose esterification process.
    Type: Grant
    Filed: February 13, 2008
    Date of Patent: April 10, 2012
    Assignee: Eastman Chemical Company
    Inventors: Charles Michael Buchanan, Norma Lindsey Buchanan
  • Patent number: 8148518
    Abstract: Ionic liquids and cellulose ester compositions and processes and apparatus for producing ionic liquids and cellulose esters. Cellulose esters can be produced by dissolving cellulose in carboxylated ionic liquids and thereafter contacting the cellulose solution with at least one acylating reagent. Cellulose esters produced via the present invention can comprise ester groups that originate from the carboxylated ionic liquid and/or the acylating reagent.
    Type: Grant
    Filed: February 13, 2008
    Date of Patent: April 3, 2012
    Assignee: Eastman Chemical Company
    Inventors: Charles Michael Buchanan, Norma Lindsey Buchanan, Robert Thomas Hembre, Juanelle Little Lambert