Dow Global Technolgoies LLC

Nutrition & Biosciences USA 4, Inc.

Dow Wolff Cellulosics Gmbh

Dow Wolff Cellulosics Gmbh Co

Wolff Cellulosics Gmbh & Co.,

Roland Bayer

Aleksander Jozef Pyzik

Sharon Allen

Matthias Knarr

Hartwig Schlesiger

Scott T Matteucci

Jörn-Bernd Pannek

Jürgen Engelhardt

Anette Wagner

Frank Höhl

Arne Henning Kull

Daniel Auriel

Meinolf Brackhagen

Roland Adden

Mary Anne Leugers

Oliver Petermann

Daniel Lawrence Dermody

Gunter Weber

Yvonne M Goerlach-Doht

Juergen Hermanns

Robert Scott Moglia

Erik-Andreas Klohr

Joshua M Katzenstein

Marc Schmitz

Grit Grote

Marc Oliver Schmidt

Jörn Pannek

Burkhard Kressdorf

Aleksander J Dow Global Technologies Llc Pyzik

Hans-Jürgen Juhl

Grit Siegmund

Arne Kull

A method of additive manufacturing is comprised of providing a material comprised of a ethyl cellulose polymer having an ethoxy content of 43% to 52% by mass and a plasticizer. The material is heated and dispensed through a nozzle to form an extrudate deposited on a base. The base, nozzle or combination thereof is moved while dispensing the material so that there is horizontal displacement between the base and nozzle in a predetermined pattern to form an initial layer of the material on the base and successive layers of the material are adhered on the initial layer to form an additive manufactured part by repeating the aforementioned steps. The article formed of the ethyl cellulose polymer may be used in many applications such as those related to the pharmaceutical and food industries.

Method to additive manufacture biocompatible material and articles made by the method

A process for producing a water-soluble cellulose derivative of a reduced content of water-insoluble particles comprises the steps of a) reacting cellulose with an alkaline material to produce alkali cellulose, b) reacting the produced alkali cellulose with one or more derivatizing agents to produce a water-soluble cellulose derivative, c) washing the produced cellulose derivative with an aqueous liquid once or several times to provide a moist cellulose derivative having a water content of 25 to 85 percent, based on the total weight of the moist cellulose derivative, d) subjecting the moist cellulose derivative to homogenization to form the moist cellulose derivative to a paste, and e) pressing the paste through a filter of a pore size of up to 200 &#x3bc;m.

Process for producing a water-soluble cellulose derivative having a reduced content of water-insoluble particles

A three-dimensionally printed article comprises a build material and a support material, the support material comprising a hydroxypropyl methylcellulose having a DS of at least 1.0 and an MS of at least 0.6, wherein DS is the degree of substitution of methoxyl groups and MS is the molar substitution of hydroxypropoxyl groups. The support material can be removed from the build material by contacting the support material with water.

Method of printing a three-dimensional article

Support materials for 3D printing

A three-dimensionally printed article is comprised of a hydroxyethyl methylcellulose (HEMC) having a DS of 1.7 to 2.5 and an MS of at least 0.5, wherein DS is the degree of substitution of methoxyl groups and MS is the molar substitution of hydroxyethoxyl groups. The HEMC may advantageously be used as a support material when making a three-dimensionally printed article using a build material such as a different thermoplastic polymer such as a poly(acrylonitrile-butadiene-styrene), polylactic acid, polyethylene and polyprophylene. When the HEMC is a support material it may be easily removed from the build material by contacting the three dimensionally printed article with water, which may be at ambient temperatures and a pH that is neutral or close to neutral.

A heat moldable composition which useful for preparing ceramic bodies comprises an inorganic material that sets as a result of baking or sintering, and a hydroxypropyl methylcellulose having a DS of at least 1.4 and an MS of at least 0.6, wherein DS is the degree of substitution of methoxyl groups and MS is the molar substitution of hydroxypropoxyl groups, and a viscosity of up to 80 mPa&#xb7;s, determined as a 2% by weight solution in water at 20&#xb0; C., wherein the heat moldable composition comprises at least 40 weight percent of the inorganic material and at least 10 weight percent of the hydroxypropyl methylcellulose, and wherein the composition does not comprise more than 5 weight percent of water, all percentages being based on the total weight of the composition.

Heat moldable ceramic composition

The inventions is directed to a method for recovering support materials used in an additive manufacturing process. The method comprises exposing a precursor additive manufactured article comprised of a water soluble support polymer and an insoluble material to water. The water soluble support polymer is dissolved in the water. The remaining article is then removed from the water. The dissolved water soluble polymer is precipitated from the water. The precipitated polymer is separated from the water and any remaining water removed to recover the water soluble support polymer. The recovered water soluble support polymer may then be re-used to make further additive manufactured articles.

Recovery of additive manufacturing support materials

Cellulose ethers are described which are useful in compositions for extrusion-molded bodies. In these cellulose ethers the ether substituents are methyl groups, hydroxyalkyl groups, and optionally alkyl groups being different from methyl, the cellulose ether has an MS (hydroxyalkyl) of 0.11 to 1.00, and hydroxy groups of anhydroglucose units are substituted with methyl groups such that [s23/s26&#x2212;0.2*MS (hydroxyalkyl)] is 0.35 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.

Cellulose ethers and their use

A composition for extrusion-molded bodies which comprises

Composition for extrusion-molded bodies

A methyl cellulose having a DS(methyl) of from 1.10 to 1.61 is useful for increasing the wet green modulus of an extrusion-molded hollow body, particularly an extrusion-molded hollow body having a ceramic honeycomb structure.

Composition for extrusion-molded bodies comprising a methyl cellulose

The present invention relates to an extrudable hydraulic or non-hydraulic binding composition with improved properties with respect to crack formation and a method of making such a composition. The invention further relates to a method of decreasing or avoiding the formation of cracks of an extruded hydraulic or non-hydraulic binding composition and to a method of making an extruded article having less or no cracks. Furthermore, the invention is directed to a cellulose ether providing an extrudable hydraulic or non-hydraulic binding composition with improved properties with respect to crack formation.

Cellulose ether suitable for the extrusion of cement bound articles with improved properties

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.

Additives comprising cellulose ethers for ceramics extrusion

The present invention relates to specific additives comprising cellulose ether, a plasticizer, at least one defoamer and water having a pH greater than 7 for improving the extrudability of clay ceramic masses and other masses which set as a result of baking or sintering, a corresponding extrusion process, the extrudates and their use.

Cellulose ether additives for the extrusion of ceramic masses

Growing community of inventors

Walsrode, Germany

Roland Bayer