Patents Assigned to Dow Wolff Cellulosics GmbH
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Publication number: 20170174567Abstract: The present invention provides substantially nonionic brush polymers having pendant polyether groups, preferably poly(alkylene glycol) groups, which polymers are useful as synthetic polymer substitutes for cellulose ethers in mortars and hydraulic binders. The brush polymers are preferably crosslinked, such as with ethylene glycol di(meth)acrylates.Type: ApplicationFiled: March 27, 2015Publication date: June 22, 2017Applicants: Dow Europe GmbH, Dow Wolff Cellulosics GmbH & Co. OHG, The Dow Chemical CompanyInventors: Robert Baumann, Adam W. Freeman, Philip M. Imbesi, Marc Schmitz, Hongwei Shen, Wei-Wen Tsai, Sipei Zhang
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Publication number: 20170107149Abstract: The present invention provides aqueous compositions that are stable after at least a 24 hour period comprising a polysaccharide viscosity modifying additive and more than 60 wt. %, based on the weight of total solids in the compositions of one or more polycarboxylate ether, the compositions comprising an acid chosen from an organic acid having 1 hydroxy group or less, a strong acid containing a single hydrogen, an ascorbic acid, and mixtures thereof, the compositions having a pH of less than the pH of the polycarboxylate ether itself, or from 1.0 to 6.0. The present invention enables stable concentrates of aqueous polycarboxylate ethers and polysaccharide viscosity modifying agents for use in hydraulic binder applications, the compositions having a total solids content of 10 wt. % to as high as 65 wt. %.Type: ApplicationFiled: March 27, 2015Publication date: April 20, 2017Applicants: Dow Europe GmbH, Dow Wolff Cellulosics GmbH & Co. OHG, The Dow Chemical CompanyInventors: Robert Baumann, Marc Schmitz, Anette Wagner
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Publication number: 20160114047Abstract: A composition designed for application to a mucosa comprises a tonicity-adjusting agent, a methylcellulose, and a liquid diluent, wherein the methylcellulose has anhydroglucose units joined by 1-4 linkages wherein hydroxy groups of anhydroglucose units are substituted with methyl groups such that s23/s26 is 0.36 or less, wherein s23 is the molar fraction of anhydroglucose units wherein only the two hydroxy groups in the 2- and 3-positions of the anhydroglucose unit are substituted with methyl groups and wherein s26 is the molar fraction of anhydroglucose units wherein only the two hydroxy groups in the 2- and 6-positions of the anhydroglucose unit are substituted with methyl groups.Type: ApplicationFiled: July 16, 2014Publication date: April 28, 2016Applicants: Dow Global Technologies LLC, Dow Wolff Cellulosics GmbH & Co. OHG, The Dow Chemical Company, Union Carbide Chemicals & Plastics Technology LLCInventors: Jaime Curtis-Fisk, Susan L. Jordan, True L. Rogers, Matthias Knarr, Meinolf Brackhagen, Roland Adden
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Publication number: 20150125653Abstract: A composition for extrusion-molded bodies which comprises a) an inorganic material that sets as a result of baking or sintering, and b) a methylhydroxypropyl cellulose having a DS(methyl) of from 0.8 to 2.5 and an MS(hydroxypropyl) of from 0.50 to 1.20 is useful for producing extrusion-molded bodies for use as a carrier for a catalyst, a catalyst, a heat exchanger, or a filter.Type: ApplicationFiled: January 13, 2015Publication date: May 7, 2015Applicants: Dow Wolff Cellulosics GmbH, THE DOW CHEMICAL COMPANYInventor: Roland Bayer
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Patent number: 8623128Abstract: The present invention relates to extrudable ceramic masses and other masses which set as a result of baking or sintering, which masses comprise specific additives based on water-soluble cellulose ethers, an extrusion process, the extrudates and their use.Type: GrantFiled: November 29, 2012Date of Patent: January 7, 2014Assignee: Dow Wolff Cellulosics GMBH CoInventors: Roland Bayer, Matthias Knarr
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Publication number: 20080199573Abstract: The invention relates to a stable uncrosslinked hemicellulose paste and also to a method for production thereof. The hemicellulose obtained by alkaline extraction from a hemicellulose-containing material is thereby treated in the alkaline medium with an oxidant, subsequently the pH value is reduced. Subsequent thereto, precipitation and separation of excess liquid is effected with formation of a homogeneous and stable paste. The pastes according to the invention are used in the field of foodstuffs and food additives.Type: ApplicationFiled: June 7, 2006Publication date: August 21, 2008Applicants: Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V., Dow Wolff Cellulosics GmbHInventors: Ulrich Drechsler, Fritz Loth, Kay Hettrich
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Patent number: 7402668Abstract: 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 includes: (a) alkalizing cellulose by means of 0.9 to 2.9 equivalents of an alkali metal hydroxide I/AGU of the cellulose in the form of an aqueous alkali metal hydroxide solution, in the presence of a suspension medium containing at least 0.2 equivalents of an alkylating agent I/AGU of the cellulose; (b) reacting the alkalized cellulose of step (a) with alkylating agent I and a hydroxyalkylating agent at a temperature above 65° C.Type: GrantFiled: July 17, 2002Date of Patent: July 22, 2008Assignee: Dow Wolff Cellulosics GmbHInventors: Wolfgang Dannhorn, Erik-Andreas Klohr, Martin Kowollik, Hartwig Schlesiger, Jörn-Bernd Pannek
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Patent number: 7371279Abstract: A composition comprising cellulose ether, a superplasticizer and defoamer suitable for use as an additive in extruding inorganic compositions is disclosed. The inventive composition functions as a water retention agent, plasticizer and lubricant in the extrusion of inorganic compositions. The use of the inventive composition in the extrusion of building materials leads to improved processing properties, to a higher surface quality and product properties of the extruded article.Type: GrantFiled: June 27, 2006Date of Patent: May 13, 2008Assignee: Dow Wolff Cellulosics GmbHInventors: Roland Bayer, Hartwig Schlesiger, Daniel Auriel