Abstract: A method for producing a shaped body by sintering including steps of a. providing a starting material containing metal powder and/or ceramic powder, b. forming a green part from the starting material by shaping the starting material if it contains binder material or by introducing a binder material into a powder bed formed from the starting material, c. chemically debinding, and/or debinding by means of a solvent, the green part to obtain a brown part, d. thermally debinding the brown part, e. consolidating the brown part to give the shaped body by sintering. The brown part is treated after step c. and before step d. with a plasticizer that softens the binder material still present in the brown part. Before step d. and after the treatment with the plasticizer, the brown part is subjected to an isostatic pressing operation by contacting with a medium under an elevated pressure.

Abstract: The present invention relates to a filament suitable to be used in a 3D printing device, wherein the filament comprises a metal and/or ceramic powder, a thermoplastic binder and additives. The invention also relates to a process for producing a shaped body comprising the step of printing a shaped green body using the filament according to the invention. Also provided is the use of a filament according to the invention in a 3D printing device and a green body producible by mixing a metal and/or ceramic powder and a thermoplastic binder. The invention also relates to the use of a binder of the invention for the production of a filament for 3D printing devices.

Abstract: The present invention relates to a filament suitable to be used in a 3D printing device, wherein the filament comprises a metal and/or ceramic powder, a thermoplastic binder and additives. The invention also relates to a process for producing a shaped body comprising the step of printing a shaped green body using the filament according to the invention. Also provided is the use of a filament according to the invention in a 3D printing device and a green body producible by mixing a metal and/or ceramic powder and a thermoplastic binder. The invention also relates to the use of a binder of the invention for the production of a filament for 3D printing devices.

Abstract: The present invention relates to a filament suitable to be used in a 3D printing device, wherein the filament comprises a metal and/or ceramic powder, a thermoplastic binder and additives. The invention also relates to a process for producing a shaped body comprising the step of printing a shaped green body using the filament according to the invention. Also provided is the use of a filament according to the invention in a 3D printing device and a green body producible by mixing a metal and/or ceramic powder and a thermoplastic binder. The invention also relates to the use of a binder of the invention for the production of a filament for 3D printing devices.

Abstract: The present invention relates to a method of manufacturing thermoplastic molding compound powder that consists of or comprises spherical or approximately spherical molding compound particles from a suspension of glass-like and/or ceramic and/or metallic substrate particles in a solvent in which a binder is dissolved that has a polymer soluble in the solvent, wherein the binder furthermore has one or more additives soluble in the solvent, with the method comprising the step of spray drying the suspension and with the spray drying being carried out such that the solvent partially or completely transitions into the gas phase.

Abstract: The present invention relates to a filament suitable to be used in a 3D printing device, wherein the filament comprises a metal and/or ceramic powder, a thermoplastic binder and additives. The invention also relates to a process for producing a shaped body comprising the step of printing a shaped green body using the filament according to the invention. Also provided is the use of a filament according to the invention in a 3D printing device and a green body producible by mixing a metal and/or ceramic powder and a thermoplastic binder. The invention also relates to the use of a binder of the invention for the production of a filament for 3D printing devices.

Abstract: A process for producing a shaped body includes the steps of producing a molding composition, plasticization of the molding composition in an extruder and discharge through a slit die, introduction of the green body into a smoothing calender, smoothing the green body through the use of one or more smoothing processes, chemical and/or thermal binder removal and sintering. The continuous process preferably makes it possible to economically produce sheet products having a high surface quality.

Abstract: The process of the invention for producing highly porous shaped sintered parts comprises the foaming of thermoplastically flowable molding compositions in the temperature range 80-130° C. An important feature of the process is the use of expandable polystyrene as blowing agent, and also of binder components matched thereto. During foaming, intrinsically closed, cell-like polystyrene foam particles are formed, which allows the manufacture of mechanically strong shaped sintered bodies having a proportion of pores of up to 85% by volume combined with high homogeneity of the pore diameter. The process is employed for the manufacture of open- or closed-porosity shaped sintered ceramic and/or metallic bodies.

Abstract: A process for freezing a plastic molding machine involving: (a) providing a freezable compound containing: (i) from 20 to 45% by weight of at least one homopolymer or copolymer selected from the group consisting of an ester of methacrylic acid with a monohydric alcohol having from 1 to 4 carbon atoms, a graft polymer of an ester of methacrylic acid with a monohydric alcohol having from 1 to 4 carbon atoms, an ethylene/vinyl acetate copolymer, a graft copolymer of an ethylene/vinyl acetate copolymer, and mixtures thereof; (ii) from 45 to 75% by weight of chalk having a particle size of from 2 to 150 microns; and (iii) from 0.01 to 10% by weight of at least one freezing agent selected from the group consisting of a lubricant having a volatility of less than 0.2% by weight, a release agent having a volatility of less than 0.2% by weight, and mixtures thereof; and (b) charging the plastic molding machine with the freezable compound prior to turning of the plastic molding machine.

Abstract: Stabilizers for chlorine-containing olefin polymers containing Ca complexes of 1,3-diketones, hydrocarbon waxes and esters and/or partial esters of saturated, straight-chain C.sub.12 -C.sub.34 monocarboxylic acids, in conjunction with zinc salts of saturated, straight-chain C.sub.8 -C.sub.22 monocarboxylic acids and esters of phosphorous acid, provide the polymers with excellent properties in regard to processibility and temperature stability.

Abstract: Metallic or ceramic hollow spheres are produced by applying a solid layer to a substantially spherical particle of foamed polymer and the coated polymer cores are pyrolyzed with formation of vapor. In order to permit an economical production of the hollow spheres and a wide selection from a wide range of metallic or ceramic materials, the particles consisting of foamed polymer are treated in a state of agitation with an aqueous suspension which contains dissolved or suspended binder and metallic and/or ceramic powder particles, whereby a coating is formed on said polymer particles. The coating is dried, the polymer particles and least part of the binder are subsequently pyrolyzed at temperatures from 400.degree. to 500.degree. C. with formation of vapor while they are agitated and the resulting metallic and/or ceramic hollow spheres are sintered at temperatures from 1000.degree. to 1500.degree. C. while they are agitated.

Abstract: A process is described in which hollow spheres or hollow-sphere composites (moldings) having high-strength walls are produced. Additional layers are applied to metallized spherical lightweight particles having a core of foamed polymer. In order to increase the strength of the wall of the spherical particle and the strength of the molding, metallized lightweight spherical particles having a metal wall thickness of 5 to 20 microns are treated (coated) with a dispersion of particulate metal or metal oxide or particulate ceramic or refractory material, the lightweight spherical particles coated in a thickness from 15 to 500 microns are dried, the dried particles are heated to a temperature of about 400.degree. C. to effect a pyrolysis of the polymer core, and the particles are subsequently sintered at a temperature from 900.degree. to 1400.degree. C.

Abstract: A substituted melamine additive being a mixture of the formula ##STR1## wherein the six R substituents represent the following: (a) 0 to 3 are hydrogen;(b) 1 to 5 are R'--OCH.sub.2 --, wherein R' is a member selected from the group consisting of hydrogen and alkyl having from 1 to 4 carbon atoms;(c) 1 to 4 are substituents selected from the group consisting of R.sup.2 OCH.sub.2 --, R.sup.2 COOCH.sub.2 --, R.sup.2 CONHCH.sub.2 --, mixtures thereof, wherein R.sup.2 is a hydrocarbon group having 8 to 28 carbon atoms, and(d) 0 to 2 are substituents selected from the group consisting of Z--CH.sub.2 --O--CH.sub.2 -- and Z--CH.sub.2 --, wherein Z is a melamine group of the formula ##STR2## The substituted melamine additives are useful as additives in molding compositions based on thermosetting condensation resins to improve the moldability of the composition.