Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7402668 | Process of preparing alkylhydroxyalkylcellulose A process of preparing alkylhydroxyalkylcellulose (e.g., methylhydroxyethylcellulose and methylhydroxypropylcellulose) by reaction of cellulose in the presence of alkali metal hydroxide with an alkylating agent and a hydroxyalkylating agent is described. The process... | 07/22/2008 |
| 7361753 | Method for the production of easily wetted, water-soluble, powdered at least alkylated non-ionic cellulose ethers The invention relates to a method for the production of at least alkylated, non-ionic cellulose ethers, whereby at least 10% of all hydroxy groups contained therein are alkylated and which may flocculate in water, within a temperature range of 45 to 95° C. The inve... | 04/22/2008 |
| 7351422 | Hemostatic soluble cellulose fibers containing coagulating protein for treating wound and process for producing the same Proposed is a novel soluble trauma-healing and hemostatic cellulose fiber capable of absorbing and readily dissolving hemorrhaging trauma loci when applied thereto and of promoting the hemostatic action of blood platelets and fibrin and cell adhesion to the trauma s... | 04/01/2008 |
| 7247722 | Polysaccharide aldehydes prepared by oxidation method and used as strength additives in papermaking Polysaccharide aldehydes are prepared using selective oxidation involving the use of nitroxyl radical mediated aqueous oxidation with a limited amount of oxidant and defined reaction conditions. These polysaccharide aldehyde derivatives having maximum effective alde... | 07/24/2007 |
| 7208593 | Self-cross-linked alkyl cellulose A process for producing a self-cross-linking alkyl cellulose derivative, which includes irradiating, with radioactive rays, a mixture of a starting alkyl cellulose derivative (the number of carbon atoms of the alkyl group is 1 through 3, the alkyl group may be subst... | 04/24/2007 |
| 7005515 | Process for preparing alkyl hydroxyalkyl cellulose ethers The process for preparing an alkyl hydroxyalkyl cellulose ether comprises the steps of: a) alkalizing cellulose to obtain alkali cellulose, b) reacting alkali cellulose with an alkyl halogenide until an alkyl cellulose ether with a D.S.(alkyl) value of from 0.7 to 2... | 02/28/2006 |
| 6960660 | Water-soluble cellulose ether having improved filtering characteristics and selection method A water-soluble cellulose ether is selected by judging whether the number of undissolved fibers having a size of 16–200 μm is up to 350 fibers/2 ml in a 0.1 wt % aqueous solution of the cellulose ether at 25° C. This water-soluble cellulose ether forms an aqueou... | 11/01/2005 |
| 6933381 | Method of preparing modified cellulose ether 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, preferabl... | 08/23/2005 |
| 6891034 | Process for preparing alkylhydroxyalkyl cellulose Described is a process of preparing alkylhydroxyalkyl cellulose, e.g., methylhydroxypropyl cellulose (MHPC). The process includes: (a) alkylating cellulose with an aqueous caustic solution containing from 1.5 to 5.5 equivalents of alkali metal hydroxide, e.g., NaOH,... | 05/10/2005 |
| 6849729 | Low-substituted cellulose ether powder and production process thereof Provided is a cellulose polymer having a water retention property, and good feeling upon use when applied to the skin and being suitably used as a carrier. More specifically, provided is a low-substituted cellulose ether powder comprising primary particles wherein a... | 02/01/2005 |
| 6843845 | Admixture and extrudable hydraulic composition An admixture comprising (A) a nonionic water-soluble hydroxyethyl cellulose and/or hydroxyethyl ethyl cellulose having a viscosity of at least 500 mPa·s as measured in a 1 wt % aqueous solution at 20° C., and (B) another nonionic water-soluble cellulose ether havi... | 01/18/2005 |
| 6669863 | Anionic cellulose ethers having temperature-dependent associative properties An anionic cellulose ether obtainable by a process comprising reacting an alkali metal cellulose with one or more reagents A selected from the group consisting of haloacetic acids, alkali metal haloacetates, alkali metal vinyl sulfonates, vinyl sulfonic a... | 12/30/2003 |
| 6627751 | Hydrophobically modified anionic cellulose ethers A hydrophobically modified anionic cellulose ether obtainable by a process comprising reacting an alkali metal cellulose with at least three alkylating reagents A, B, and C. Reagent A is selected from the group of haloacetic acids, alkali metal haloacetat... | 09/30/2003 |
| 6602994 | Derivatized microfibrillar polysaccharide 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 ... | 08/05/2003 |
| 6600033 | Modified cellulose ethers 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, ##STR1## such as one having 5 to 22, preferably 1... | 07/29/2003 |
| 6593468 | Essentially fiber-free cellulose ether with improved water retention, method for the production and use thereof This invention relates to a process for producing a substantially fiber-free carboxymethyl cellulose which predominantly exhibits elastic properties, to the use thereof as a superabsorbent material, and to the use thereof as an adjuvant substance for achi... | 07/15/2003 |
| 6562961 | Aminoalkyl trialkyl silyl cellulose and a method for coating surfaces 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 substi... | 05/13/2003 |
| 6482876 | Agglomerates for the production of an aqueous binder system The invention relates to an agglomerate containing at least one of the following water-soluble or water-dispersible materials as a bonding base polymer: carboxylized and/or alkoxylized starch, cellulose ether and fully synthetic vinyl polymers and/or poly... | 11/19/2002 |
| 6392035 | Reactive cellulose and method for making same The invention concerns reactive cellulose, i.e. cellulose having in particular a very low degree of crystallinity obtainable with a high degree of purity. Said novel reactive cellulose is particularly used as raw material for making cellulose ethers. The ... | 05/21/2002 |
| 6320043 | Process for preparing fine-particle polysaccharide derivatives The invention relates to a new, particularly economic process for preparing pulverulent polysaccharide derivatives, in particular cellulose derivatives, having a thermal flocculation point; the process comprises soaking or dissolving the polysaccharide de... | 11/20/2001 |
| 6261218 | Process and apparatus for making low molecular weight cellulose ethers There is a process for making a cellulose ether. The process comprises the following: a) alkalyzing a cellulose pulp; b) etherifying the alkalyzed cellulose pulp to form a cellulose ether; c) washing the cellulose ether; d) drying the cellulose ether; e) ... | 07/17/2001 |
| 6235893 | Process for making cellulose ether having enhanced gel strength According to the present invention, there is a methylcellulose having a methoxy substitution of about 21 to about 42 percent based upon the weight of the cellulose ether and elastic modulus (EM) of EMࣙ181.3×(v0.2711) wherein "v" is viscosity... | 05/22/2001 |
| 5898072 | Aqueous suspension of a cellulose ether, method for the production thereof, and composition The invention concerns an aqueous suspension of a non-ionic, water-soluble cellulose ether cross-linked with glyoxal, in the presence of an electrolytic salt which gives a pH value below 8.0 in water and at the concentration involved. Conveniently, the su... | 04/27/1999 |
| 5837864 | Method for producing a suspension in water of a cellulose ether, and dry mixture suitable for use in the production of the suspension In a method of producing a suspension of a nonionic cellulose ether that has no turbidity point, the water forming part of the suspension is mixed with a dry mixture containing a cellulose ether, which is cross-linked with glyoxal, and an electrolyte salt... | 11/17/1998 |
| 5804166 | Low VOC hair sprays containing cellulose ethers Disclosed are hair spray compositions containing non-ionic cellulosic ethers in a solvent base containing water and volatile organic solvent wherein the level of volatile organic solvent in the composition is about 80% or less, and wherein the non-ionic c... | 09/08/1998 |
| 5770528 | Methylated hydroxypropylcellulose and temperature responsive products made therefrom The present invention is directed to a method of producing methylated hydroxypropylcellulose (m-HPC). By controlling the degree of methylation, one can manipulate the lower critical solution temperature (LCST) of the m-HPC polymer to below room temperatur... | 06/23/1998 |
| 5719274 | Process for the preparation of low molecular weight cellulose ethers Low molecular weight cellulose ethers which are suitable as a coating material for solid metered units and as an additive in ceramic compositions or cosmetics formulations or as a polymerization auxiliary are obtained by irradiation of a mixture of a high... | 02/17/1998 |
| 5595980 | Contraceptive compositions Improved contraceptive compositions are disclosed which comprise a spermicide or virucide, a polymeric delivery component and optionally a cosmetic ingredient. The improvement is directed to the use of certain hydrophobically modified polysaccharides as t... | 01/21/1997 |
| 5589589 | Process for screening cellulose ethers A process and apparatus for screening cellulose ethers which have a finely fibrous or wad-like or woolly structure, wherein the process comprises the following steps: a) applying the cellulose ether (material to be screened) to a sieve surface, b) dividin... | 12/31/1996 |
| 5488104 | Process for comminuting cellulose ethers This invention is a process for comminuting a cellulose ether which comprises extruding a hydrated cellulose ether through a plurality of orifices, each orifice having a cross-sectional area of from about 7.5×10-9 m2 to about 1×10 | 01/30/1996 |
| 5466390 | Liquid cleaning products Substantially non-aqueous liquid cleaning compositions comprise a non-aqueous liquid phase, which liquid phase comprises an alkylpolyglucoside partial ether. Specific novel alkylpolyglucoside partial ether are also claimed.... | 11/14/1995 |
| 5385607 | Water-soluble sulphoalkyl hydroxyalkyl derivatives of cellulose and their use in gypsum- and cement-containing compounds The invention relates to a new class of water-soluble ionic cellulose derivatives and their use as additive for gypsum- and cement-containing compounds.... | 01/31/1995 |
| 5358561 | Use of water-soluble sulphoalkyl derivatives of cellulose in gypsum-and cement-containing compounds The invention relates to water-soluble ionic cellulose derivatives and their use as additives for gypsum- and cement-containing compounds.... | 10/25/1994 |
| 5278304 | Water-soluble sulfoethyl cellulose ethers of very high solution quality and a process for their production The invention relates to water-soluble sulfoethyl cellulose ethers, more particularly methyl sulfoethyl cellulose ether (MSEC), of very high solution quality, to a process for its production and to the use of these products as thickeners, dispersants or b... | 01/11/1994 |
| 5218107 | Removal of undesirable material from water-soluble cellulose ether aqueous solutions This invention is a process of removing water-soluble impurities from a water-soluble cellulose ether aqueous solution containing such water-soluble impurities comprising treating an aqueous solution comprising a water-soluble cellulose ether and a water-... | 06/08/1993 |
| 5196527 | Porous ion-exchanged fine cellulose particles, method for production thereof, and affinity carrier This invention relates to ion-exchanged fine cellulose particles, porous fine cellulose particles which can be advantageously used as an affinity carrier, and methods of production thereof. These fine particles of the invention have the advantage that the... | 03/23/1993 |
| 5166332 | Alkenyl methyl hydroxypropyl cellulose ethers and a process for their production New alkenyl methyl hydroxypropyl cellulose ethers have an average degree of substitution DS with methyl groups of 1.5 to 2.9, a molar degree of substitution MS with hydroxypropyl groups of 1.4 to 1.9 and an average degree of substitution DS with alkenyl g... | 11/24/1992 |
| 5166333 | Methyl hydroxypropyl cellulose ethers and a process for their production The new thermoplastic methyl hydroxypropyl cellulose ethers have an average degree of substitution with methyl groups of 1.5 to 2.9 and a molar degree of substitution with hydroxypropyl groups of 1.4 to 1.9.... | 11/24/1992 |
| 5055570 | Cuprammonium-stable cellulose esters and carbamates for dialysis membranes A cellulose derivative comprising substitution-modified cellulose regenerated from a cuprammonium solution, the substituents being ester groups, wherein the acyl group represents one or more, optionally substituted, carbon chains with 10-36 carbon atoms, ... | 10/08/1991 |
| 5013832 | Process for working up water-soluble cellulose derivatives having high flocculation points A process for working up water-soluble cellulose derivatives, more especially with flocculation points above 85° C., after removal by condensation of readily volatile constituents of the crude product mixture resulting from an etherification reaction, by... | 05/07/1991 |
