Covestro Deutschland Ag

Stratasys, Inc.

Covestro Intellectual Property Gmbh & Co. Kg

The Procter Gamble Company

Roland Wagner

Dirk Achten

Hans-Josef Laas

Thomas Büsgen

Christoph Tomczyk

Thomas Buesgen

Levent Akbas

Bettina Mettmann

Michael Ludewig

Michael Kessler

Jörg Tillack

Florian Johannes Stempfle

Wolfgang Arndt

Jan Weikard

Thomas Fäcke

Frank Richter

Martin Melchiors

Mathias Matner

Rolf Gertzmann

Michael Albert Snyder

Christoph Eggert

Peter Reichert

Nicolas Degiorgio

Dirk Dijkstra

Jonas Kuenzel

Jörg Büchner

Thomas Michaelis

Katharina Streicher

Stefanie Eiden

Tiffany Tien-Yun Yang

Joseph Harry Jansen

Paul Heinz

Albert Schnering

Florian Golling

Fabian Schuster

Jürgen Hättig

Ting Liu

Richard Meisenheimer

Maximilian Wolf

Cornelia Steck

Thomas Busgen

Martha Jane Weaver

Julien Guiu

Alisa Kayser

Arnaud Guedou

Thomas Prenveille

Jonas Künzel

Bernd Garska

Maria Elisabeth Beenen-Fuchs

Maria Elisabeth Beenen-fuchs

Rolf Albach

Robert Wayne Glenn

Thomas BÜSGEN

Ingo Steffens

A method for producing an object comprises the step of producing the object by means of an additive manufacturing process from a construction material. The construction material comprises a first polyurethane polymer which has: a weight percentage ratio of O to N of ≥2 to ≤2.5, determined by elementary analysis; a weight percentage ratio of N to C of ≥0.1 to ≤0.25, determined by elementary analysis; a full-width at half maximum of the melting peak of ≤20 K, determined by dynamic differential scanning calorimetry DSC (2heating at heating rate 20 k/min); and a difference between the melting temperature and the recrystallisation temperature of ≥5 K and ≤100 K, determined by dynamic differential scanning calorimetry DSC (2heating) at a heating and cooling rate of 20 K/min.

Additive manufacturing process using a building material having a high hard segment content

The present invention relates to an orthodontic splint made of a crosslinked polymer, wherein the crosslinked polymer has a glass transition temperature T, determined by means of dynamic-mechanical analysis at a frequency of 1/s DMA as peak tan δ, of ≥25° C. and ≤60° C., a modulus of elasticity, determined by means of dynamic-mechanical analysis as the storage modulus E' at a frequency of 1/s at 35° C., of ≥500 MPa and ≤4000 MPa, and a loss factor tan δ, determined by means of dynamic-mechanical analysis at a frequency of 1/s at 35° C., of ≥0.08. The invention further relates to a process for producing such splints.

3D-printed orthodontic splint made of crosslinked polymers

The invention relates to a method for producing an at least partially coated object, comprising the step of producing the object from a construction material by means of an additive manufacturing method, the construction material comprising a thermoplastic polyurethane material. Following the production of the object, the method comprises the step of at least partially bringing a preparation into contact with the object, the preparation being selected from: an aqueous polyurethane dispersion; an aqueous dispersion of a polymer comprising OH groups, this dispersion also containing a compound comprising NCO groups; an aqueous preparation of a compound containing NCO groups, but not containing any polymers comprising OH groups; or a combination of at least two thereof. The invention also relates to an at least partially coated object that was obtained by a method according to the invention.

Method for producing an at least partially coated object

It is a feature of a porous body () comprising a three-dimensional network of node points () joined to one another by struts (), and a void volume () present between the struts (), that the struts () have an average length of ≥200 to ≤50 mm, the struts () have an average thickness of ≥100 μm to ≤5 mm, and that the porous body has a compression hardness (40% compression, DIN EN ISO 3386-1: 2010-09) in at least one spatial direction of ≥10 to ≤100 kPa. The porous body according to the invention combines the advantages of a conventional mattress or cushion with ventilatability which results from its porous structure and is not achievable in conventional foams. The invention further relates to a method of producing such a porous body () and to an apparatus comprising said body () for supporting and/or bearing a person.

Porous body, additive manufacturing method for the body and apparatus for supporting and/or bearing a person

The invention relates to a method for producing a polymer comprising the following steps: (A) depositing a radically cross-linkable resin, obtaining a radically cross-linked resin; and (B) treating the radically cross-linked resin under conditions which are sufficient to trigger a chemical reaction that is different from the radical cross-linking in the radically cross-linked resin. The radically cross-linkable resin comprises a curable component, in which there are NCO groups, olefinic C═C double bonds and epoxide groups, and the chemical reaction in the radically cross-linked resin that is different from the radical cross-linking is the reaction of NCO groups and epoxide groups to form oxazolidinone groups.

Method for producing a cross-linkable polymer with the formation of oxazolidinones

The present invention relates to a method for producing a treated object, comprising the steps of: applying a layer of particles to a target area; applying a liquid binder to a selected portion of the layer in accordance with a cross-section of the object, so that the particles in the selected portion are bonded; repeating the steps of applying a layer of particles and applying a binder for a plurality of layers so that the bonded portions of the adjacent layers are bonded to form an object, wherein at least a part of the particles comprises a meltable polymer. A binder which cures by cross-linking is preferably selected as the binder. The obtained object is at least partially contacted with a liquid heated to &#x2265;T or with a powder bed heated to &#x2265;T in order to obtain the treated object. T represents a temperature of &#x2265;25&#xb0; C., the liquid does not represent a solvent or a reaction partner for the binder present in the object and the meltable polymer, and the powder bed is different from the particles of the meltable polymer. The invention also relates to a treated object that can be obtained by the method according to the invention.

Method for producing a treated, 3D printed object

A method for producing an article in which a layer with a radically cross-linkable resin is selectively crosslinked at least partially. This takes place according to a selected cross section of the article to be formed by means of selective application of a radical initiator. The at least partially crosslinked material is added on layer by layer to a carrier or to previous layers bonded to the carrier. A system that is suitable for carrying out the method according to the invention has a substrate, a control unit, an application unit for applying the resin to the substrate, an application unit for applying an initiator to the resin, an energy exposure unit and a contacting unit.

Method for producing an article by layer-by-layer buildup with separately patterned resin and initiator wherein the resin has a storage modulus greater than loss modulus at 20 C

The present invention relates to polymerizable compositions which contain components that can be crosslinked both via isocyanurate bonds and by a radical reaction mechanism. The invention further relates to methods by way of which polymers can be produced from said compositions.

Dual-curing isocyanurate polymers

A process for producing an object from a precursor comprises the steps of: I) depositing a free-radically crosslinked resin atop a carrier to obtain a ply of a construction material joined to the carrier which corresponds to a first selected cross section of the precursor; II) depositing a free-radically crosslinked resin atop a previously applied ply of the construction material to obtain a further ply of the construction material which corresponds to a further selected cross section of the precursor and which is joined to the previously applied ply; III) repeating step II) until the precursor is formed; IV) treating the precursor obtained after step III) under conditions sufficient to at least partially trimerize to isocyanurate groups NCO groups present in the free-radically crosslinked resin of the obtained precursor to obtain the object.

Method for producing an object from a precursor, and use of a radically crosslinkable resin in an additive production method

The invention relates to a method for producing an object from a construction material, the construction material comprising radically crosslinkable groups, NCO groups and groups having Zerewitinoff active H atoms, and the object being a three-dimensional object and/or a layer. During and/or after the production of the object, the construction material is heated to a temperature of &#x3e;50&#xb0; C., and the construction material comprises one or more cyclic tin compounds of formula F-I, F-II and/or F-III.

Dual cure method using Zerewitinoff-active H tin catalysts

A method for producing an object from a filamentary building material in an additive fused deposition modelling process, comprising the steps of: providing the building material; transporting the building material into a printhead at a feed rate for the building material, wherein the building material is transported between a driven drive wheel and a second wheel; melting the building material by means of a heating device in the printhead; discharging the molten building material to a discharge location, corresponding to a selected cross section of the object to be produced, at a discharge rate through an orifice of the printhead, with relative movement of the printhead in relation to the discharge location at a predetermined speed to movement along a predetermined path, wherein the path has at each location a curvature that can assume a positive value, zero or a negative value; wherein a control unit controls at least the drive of the drive wheel, the heating device in the printhead and the movement of the printhead in dependence on the curvature of the printing path. Likewise disclosed is a control unit for use in an installation for carrying out an additive fused deposition modelling process with a filamentary building material.

3-D printing process with path-dependent control of the printing path

A process is described for producing a three dimensional structure, the process including the following steps a) applying of at least a first material Monto a substrate to build a first layer Lon the substrate; b) layering of at least one further layer Lof the first material Mor of a further material Monto the first layer L, wherein the at least one further layer Ly covers the first layer Land/or previous layer Lat least partially to build a precursor of the three dimensional structure; c) curing the precursor to achieve the three dimensional structure; wherein at least one of the materials Mor Mprovides a Mooney viscosity of &#x3e;10 ME at 60&#xb0; C. and of &#x3c;200 ME at 100&#xb0; C. before curing and wherein at least one of the first material Mi or of the further material Mis a powder. Also, a three dimensional structure is described which is available according to the process according to the invention.

Process for producing 3D structures from powdered rubber material and its products

The invention relates to a method for producing an object, comprising the step of producing the object from a construction material by means of an additive manufacturing process, wherein the construction material comprises a plurality of thermoplastic polyurethane materials. The materials differ by at least one mechanical property such as the shore hardness or the elongation at break. The invention also relates to an object obtained according to said method.

Additive manufacturing process using several thermoplastic polyurethanes

A process for manufacturing an article comprises the steps of: I) applying a filament of an at least partially fused construction material to a support so as to obtain a layer of the construction material which corresponds to a first selected cross-section of the article; II) applying a filament of the at least partially fused construction material to a previously applied layer of the construction material so as to obtain a further layer of the construction material which corresponds to a further selected cross-section of the article and which is bonded to the previously applied layer; and III) repeating step II) until the article is formed. At least steps II) and III) are carried out in a chamber and the construction material comprises a fusible polymer. The fusible polymer has a fusion range (DSC, differential scanning calorimetry; 2nd heating at a heating rate of 5 K/min.) of &#x2265;20&#xb0; C. to &#x2264;100&#xb0; C. The fusible polymer further has a complex viscosity |&#x3b7;*| (determined by viscosity measurement in the melt using a plate-plate oscillating viscometer according to ISO 6721-10 at 100&#xb0; C. and a shear rate of l/s) of &#x2265;10 Pas to &#x2264;1000000 Pas. Finally, the temperature inside the chamber is &#x2264;50&#xb0; C. The invention also relates to an article manufactured by the process according to the invention, to an article having a substrate and to an article bonded to the substrate, the article being in the form of an adhesive joint or varnish region, and to the use of a particular polyurethane in fused deposition modeling-based additive manufacturing processes.

Fused deposition modeling-based additive manufacturing process at low temperatures

The present invention relates to a method for producing an object, comprising the step of producing the object according to an additive production process from a construction material, wherein the construction material comprises a mixture of a plurality of powdery thermoplastic materials which are different from one another due to at least one mechanical property and at least one thermoplastic material is a thermoplastic polyurethane material. The invention also relates to an object obtained according to said method.

Additive production process using a mixed thermoplastic construction material

Growing community of inventors

Leverkusen, Germany

Roland Wagner