Process for preparing grit blasting particles coated with titanium dioxide

A process for preparing grit blasting particles coated with titanium dioxide by sinter-fusing titanium dioxide on the surface of grit blasting particles made of a base material. A mixture of finely divided titanium dioxide and grit blasting particles is passed continuously through the flame in a flame reactor, with the aid of conveying air, wherein the titanium dioxide is sinter-fused on the surface of the grit blasting particles over an average residence time of 0.1 to 5 seconds in a temperature range from 600 to 1200° C. An increase in the adhesive bond between metal framework and a facing material made of plastics in dentures can be achieved when metal framework is grit blasted with a grit blasting agent containing titanium dioxide coated grit blasting particles and then the grit blasted and titanium dioxide coated surface is treated with a silane bonding agent.

Curable bonded assemblies capable of being dissociated

The invention concerns an adhesive composition for producing thermoset products, capable of being heated by means of an electric field, a magnetic field, an electromagnetic field or an alternating electromagnetic field, and containing filler particles which are metallic, ferromagnetic, ferrimagnetic, superparamagnetic or paramagnetic. Said adhesive composition can be hardened under the action of heat to form a high-resistance stable adhesive assembly, said resulting adhesive assemblies capable of being likewise dissociated under the action of heat.

Superparamagnetic oxidic particles, processes for their production and their use

Pyrogenic, oxidic particles contain superparamagnetic metal oxide domains with a diameter of 3 to 20 nm in a non-magnetic metal or non-metal oxide matrix. The particles display a chloride content of 50 to 1000 ppm. The particles are produced by pyrogenic processes by mixing the precursor of the superparamagnetic domains and the precursor of the non-magnetic metal or non-metal oxide matrix in a flame with air and/or oxygen and fuel gas and reacting this mixture in a flame. The particles can be used as ferro fluids, for example.

Spray gun

A spray gun for atomizing fluid with compressed air comprises a housing having a handle, an atomizer nozzle, a guide sleeve having a U-shaped cross section which engages in the atomizer nozzle and is supported in the housing, and a valve needle which can be operated by means of a trigger which is in a pivoting mounting. The valve needle is connected with the trigger in the area of the guide sleeve by means of a hinge pin. A seal disposed in the guide sleeve, the seal being located between a feed line and the hinge pin, with the valve needle being held in a movable arrangement in the seal.

FORMULATION COMPRISING A POLYMERIZABLE MONOMER AND/OR A POLYMER AND, DISPERSED THEREIN, A SUPERPARAMAGNETIC POWDER

Formulation comprising a polymerizable monomer and/or a polymer and, dispersed therein, a superparamagnetic powder, which comprises aggregated primary particles, the primary particles being built up from magnetic metal oxide domains having a diameter of from 2 to 100 nm in a nonmagnetic metal oxide or metalloid oxide matrix. Process for heating the formulation in a magnetic or electromagnetic alternating field. Use of the formulation as an adhesive composition.

HYDROPHOBIC ZINC OXIDE POWDER

Hydrophobic zinc oxide powder in the form of partially or completely coated aggregates of zinc oxide primary particles having a carbon content of from 0.4 to 1.5% by weight, based on the hydrophobic zinc oxide powder, and a BET surface area of from 25 to 100 m2/g, where the coated aggregates are present to 0 to <10% in a circular form, 15 to <30% in an ellipsoidal form, to <30% in a linear form, 40 to <70% in a branched form, and the sum of the different forms is 15 100% and the coating comprises chemically bonded linear and/or branched monoalkylsilyl groups Si-alkyl and/or dialkylsilyl groups Si-(alkyl)2 having 1 to 20 carbon atoms.

Zinc oxide powder aggregates present in circular, ellipsoidal, linear and branched form

Pyrogenically prepared zinc oxide powder having a BET surface area of from 10 to 200 m²/g, which is in the form of aggregates, the aggregates being composed of particles having different morphologies, and 0-10% of the aggregates being in a circular form, 30-50% being in an ellipsoidal form, 30-50% being in a linear form and 20-30% being in a branched form. It is prepared by reacting a starting mixture containing zinc vapour, a combustible gas and steam or a mixture of steam and carbon dioxide in a flame with an oxygen-containing gas in an oxidation zone, cooling the hot reaction mixture in a quenching zone and separating the solid material from the gas stream, the amount of oxygen in the oxidation zone being greater than the amount necessary for the complete oxidation of the combustible gas and the zinc vapour. The zinc oxide powder can be used as a constituent of sun protection compositions for protection against UV radiation.

Superparamagnetic oxidic particles, processes for their production and their use

Pyrogenic, oxidic particles contain superparamagnetic metal oxide domains with a diameter of 3 to 20 nm in a non-magnetic metal or non-metal oxide matrix. The particles display a chloride content of 50 to 1000 ppm. The particles are produced by pyrogenic processes by mixing the precursor of the superparamagnetic domains and the precursor of the non-magnetic metal or non-metal oxide matrix in a flame with air and/or oxygen and fuel gas and reacting this mixture in a flame. The particles can be used as ferro fluids, for example.

Dispersion containing pyrogenically manufactured abrasive particles with superparamagnetic domains

An aqueous dispersion containing abrasive particles comprises abrasive particles having superparamagnetic metal oxide domains in a non-magnetic metal oxide or non-metal oxide matrix. The abrasive particles of the aqueous dispersion can have an average particle size of below 400 nm and a BET surface area of 50 to 600 m<2>/g. The dispersion can be produced by dispersing the abrasive particles with an energy of at least 200 kJ/m<3 >using a device in which the abrasive particles are first subjected to high pressure, then decompressed through a nozzle so that the abrasive particles collide with one another or against sections of wall in the device. The aqueous dispersion can be used for chemical mechanical polishing (CMP).

Process for preparing mixed metal oxide powders

Process for preparing a mixed metal oxide powder, in which oxidizable starting materials are evaporated and oxidized, the reaction mixture is cooled after the reaction and the pulverulent solids are removed from gaseous substances, wherein as starting materials, at least one pulverulent metal and at least one metal compound, the metal and the metal component of the metal compound being different and the proportion of metal being at least 80% by weight based on the sum of metal and metal component from metal compound, together with one or more combustion gases, are fed to an evaporation zone of a reactor, where metal and metal compound are evaporated completely under nonoxidizing conditions, subsequently, the mixture flowing out of the evaporation zone is reacted in the oxidation zone of this reactor with a stream of a supplied oxygen-containing gas whose oxygen content is at least sufficient to oxidize the starting materials and combustion gases completely.

SURFACE-MODIFIED SUPERPARAMAGNETIC OXIDIC PARTICLES

Surface-modified superparamagnetic oxidic particles, characterized by the following physicochemical characteristics: BET surface area 20 to 75 m2/g; Carbon content 0.5 to 6.0% by weight; Tamped density 150 to 500 g/l; Chlorine content 50 to 1000 ppm; Drying loss 0.1 to 4.0% by weight are prepared by contacting the oxides with the surface modifier either by spraying or vapour deposition and then heat-treating them. The surface-modified oxidic particles can be used as a filler in adhesives. Further fields of application are use for data carriers, as a contrast agent in imaging processes, for biochemical separation and analysis processes, for medical applications, as an abrasive, as a catalyst or as a catalyst support, as a thickener, for thermal insulation, as a dispersing assistant, as a flow assistant and in ferrofluids.

Zinc oxide powder aggregates present in circular ellipsoidal, linear and branched form

Pyrogenically prepared zinc oxide powder having a BET surface area of from 10 to 200 m2/g, which is in the form of aggregates, the aggregates being composed of particles having different morphologies, and 0-10% of the aggregates being in a circular form, 30-50% being in an ellipsoidal form, 30-50% being in a linear form and 20-30% being in a branched form. It is prepared by reacting a starting mixture containing zinc vapour, a combustible gas and steam or a mixture of steam and carbon dioxide in a flame with an oxygen-containing gas in an oxidation zone, cooling the hot reaction mixture in a quenching zone and separating the solid material from the gas stream, the amount of oxygen in the oxidation zone being greater than the amount necessary for the complete oxidation of the combustible gas and the zinc vapour. The zinc oxide powder can be used as a constituent of sun protection compositions for protection against UV radiation.

ZINC OXIDE-CERIUM OXIDE COMPOSITE PARTICLES

Composite particles useful for absorbing in the UV-A and UV-B regions contain a zinc oxide matrix and cerium oxide domains, wherein the domains are located in and on the matrix, wherein a fraction of zinc oxide is 80 to 98% by weight and a fraction of cerium oxide is 2 to 20% by weight, in each case based on the composite particles, and wherein a BET surface area of said composite particles is from 5 to 100 m2/g.

Rubber compound containing nanoscale, magnetic fillers

Rubber compound containing at least one nanoscale, magnetic filler and at least one non-magnetic filler. Vulcanizable mixture containing the rubber compound and at least one crosslinking agent and/or vulcanization accelerator. Molding obtainable from the vulcanizable mixture by heat treatment or action of an electrical, magnetic or electromagnetic alternating field.

Curable bonded assemblies capable of being dissociated

The invention concerns an adhesive composition for producing thermoset products, capable of being heated by means of an electric field, a magnetic field, an electromagnetic field or an alternating electromagnetic field, and containing filler particles which are metallic, ferromagnetic, ferrimagnetic, superparamagnetic or paramagnetic. Said adhesive composition can be hardened under the action of heat to form a high-resistance stable adhesive assembly, said resulting adhesive assemblies capable of being likewise dissociated under the action of heat.

Spray gun

In a spray gun (1) for spraying paint with a gun housing (2) provided with a handle (3) with a union nut (10) screwed onto it that holds an air cap (11) provided with offset outlet openings (14, 15) for compressed air, the union nut (10) is positively connected to the air cap (11) in a circumferential direction. This embodiment makes it possible for the spray jet to be set in a brief time and without difficulties without having to put up with getting dirty. It is merely necessary to turn the union nut (10) accordingly in order to control the air supply to the outlet openings (14, 15) of the air cap (11) and therefore to influence the formation of the spray jet.

SURFACE-MODIFIED ZINC OXIDE-SILICON DIOXIDE CORE-SHELL PARTICLES

Surface-modified zinc-silicon oxide particles which consist of a core, a first coating layer surrounding the core, and a second coating layer surrounding the first coating layer, where the core is crystalline and consists of aggregated zinc oxide primary particles having a primary particle diameter of from 10 to 75 nm, the first coating layer consists of one or more compounds containing the elements Zn, Si and O, the second coating layer comprises linear and/or branched alkylsilyl groups having 1 to 20 carbon atoms bonded chemically to the first coating layer, which have an average aggregate area of less than 40 000 nm2 and an average aggregate diameter (ECD) of less than 300 nm, a carbon content of from 0.4 to 1.5% by weight and a BET surface area of from 10 to 60 m2/g.

Spray gun

In a spray gun ( 1 ) for atomizing fluid media with the help of compressed air consisting of a housing ( 11 ) with a handle ( 14 ) and an atomizer nozzle ( 19 ), of a guide sleeve which engages in the atomizer nozzle ( 19 ) and is supported in the housing ( 11 ), as well as of a valve needle ( 31 ) which can be operated by means of a trigger handle ( 26 ) which is in a pivoting mounting, the valve needle ( 31 ) is located in a positive connection with the trigger handle ( 26 ) in the area of the guide sleeve ( 21 ) by means of a hinge pin ( 27 ′). Furthermore, a seal ( 32 ) is inserted in the guide sleeve ( 21 ) with a U-shaped cross section, the seal ( 32 ) being located between a feed line ( 16 ) and the hinge pin ( 27 ′), with the valve needle ( 31 ) being held in a movable arrangement in the seal ( 32 ). This embodiment not only ensures that a reliable function is always guaranteed, but also that the valve needle ( 31 ) can be installed in the guide sleeve ( 21 ) in a positionally-oriented manner without any difficulty and without the possibility of the media to be applied leaking from it. Using an assembly tool, namely, the valve needle ( 31 ) is to be inserted into the guide sleeve ( 21 ) closed at one end in such a way that the hinge pin ( 27 ′) can be fitted. Furthermore, economical production is possible because the one-piece valve needle ( 31 ) can be manufactured from plastic.

Low-surface area fumed silicon dioxide powder

Fumed silicon dioxide powder with a BET surface area of 20 to 35 m2/g, characterized in that a) the number-based median particle diameter is 60 to 150 nm, and b) the proportion of particles with a diameter of 200 nm or more is at most 10%, and c) the proportion of particles with a diameter of up to 60 nm is at most 20%, based in each case on the total number of particles.

Nanoscale, crystalline silicon powder

Aggregated, crystalline silicon powder with a BET surface of more than 50 m 2 /g. The powder is produced by continuously feeding at least one vaporous or gaseous silane and optionally at least one vaporous or gaseous doping substance and an inert gas into a reactor and mixing the components there, wherein the proportion of silane is between 0.1 and 90 wt. % referred to the sum total of silane, doping substance and inert gas, the mixture is caused to react by input of energy, wherein a plasma is produced by the input of energy by means of electromagnetic radiation in the microwave range at a pressure of 10 to 1100 mbar, the reaction mixture is allowed to cool and the reaction product is separated in the form of a powder from gaseous substances. The powder may be used for the production of electronic components.

NANOSCALE SUPERPARAMAGNETIC POLY(METH)ACRYLATE POLYMERS

The invention relates to hybrid materials comprising polymers which envelop nanoscale, superparamagnetic, ferromagnetic, ferrimagnetic or paramagnetic powders, to a process for producing these materials and to their use. 118-. (canceled)19. A method of joining at least two substrates , comprising adhering the at least two substrates with an adhesive composition comprising hybrid materials comprising nanoscale superparamagnetic , ferromagnetic , ferrimagnetic or paramagnetic particles in a core enveloped by at least one polymer.20. The method of claim 19 , wherein the adhesive composition is a one-component adhesive.21. The method of claim 19 , wherein the hybrid materials are in an adhesive matrix of a 2 stage adhesive.22. The method of claim 19 , wherein the hybrid materials are in an epoxy matrix as 2 stage adhesive.23. The method of wherein the at least two substrates are automotive substrates claim 19 , aircraft substrates claim 19 , shipbuilding substrates claim 19 , rail-vehicle substrates and space-travel substrates.24. The method of claim 19 , wherein the at least one polymer is a poly(meth)acrylate.25. The method of claim 19 , wherein the core comprises nanoscale superparamagnetic claim 19 , ferromagnetic claim 19 , ferrimagnetic or paramagnetic particles comprising at least one ferrite.26. The method of claim 25 , wherein the core comprises nanoscale superparamagnetic claim 25 , ferromagnetic claim 25 , ferrimagnetic or paramagnetic particles comprising at least one iron oxide coated by at least one silicon oxide.27. The method of claim 19 , wherein a first shell comprises at least one polymer which forms a gel in a plasticizer claim 19 , in plasticizer-containing adhesive or in epoxy adhesives.28. The method of claim 19 , wherein the adhesive composition is a plasticizer containing adhesive.29. The method of claim 19 , wherein the adhesive composition is an epoxy adhesive.30. The method of claim 28 , wherein a first shell comprises at least one polymer ...

Doped zinc oxide powder, process for its preparation, and its use

Pyrogenically prepared, doped zinc oxide powder, wherein the doping component comprises at least one oxide from the group aluminum, gallium, indium, germanium, tin and is present in the doped zinc oxide powder in an amount of from 0.005 to 15 wt. %, and wherein the doped zinc oxide powder is in the form of aggregates of primary particles having a mean maximum diameter of from 30 to 400 nm. It is prepared by oxidation from zinc powder and at least one doping agent, wherein the process zones vaporisation, nucleation, oxidation and quenching are passed through and the doping agent is metered in in the nucleation zone, in which the temperature is below the boiling temperature of zinc. The doped zinc oxide powder can be used in electrically conductive lacquers and coatings.

PROCESS FOR PREPARING MIXED METAL OXIDE POWDERS

Process for preparing mixed metal oxide powders Abstract Process for preparing a mixed metal oxide powder, in which oxidizable starting materials are evaporated in an evaporation zone of a reactor and oxidized in the vaporous state in an oxidation zone of this reactor, the reaction mixture is cooled after the reaction and the pulverulent solids are removed from gaseous substances, wherein at least one pulverulent metal, together with one or more combustion gases, is fed to the evaporation zone, the metal is evaporated completely in the evaporation zone under nonoxidizing conditions, an oxygen-containing gas and at least one metal compound are fed, separately or together, in the oxidation zone to the mixture flowing out of the evaporation zone, the oxygen content of the oxygen-containing gas being at least sufficient to oxidize the metal, the metal compound and the combustion gas completely.

Plastic Composite Moulded Bodies Obtainable by Welding in an Electromagnetic Alternating Field

The invention relates to plastics composite mouldings obtainable via welding in an alternating electromagnetic field, in which the weld is obtained with the aid of a plastics material which comprises nano-scale, magnetic oxidic particles, which are composed of aggregated primary particles, and where the primary particles are composed of magnetic metal oxide domains whose diameter is from 2 to 100 nm in a non-magnetic metal oxide matrix or non-magnetic metalloid oxide matrix.

Spray gun

In a spray gun (1) for spraying paint with a gun housing (2) provided with a handle (3) with a union nut (10) screwed onto it that holds an air cap (11) provided with offset outlet openings (14, 15) for compressed air, the union nut (10) is positively connected to the air cap (11) in a circumferential direction. This embodiment makes it possible for the spray jet to be set in a brief time and without difficulties without having to put up with getting dirty. It is merely necessary to turn the union nut (10) accordingly in order to control the air supply to the outlet openings (14, 15) of the air cap (11) and therefore to influence the formation of the spray jet.

LOW-SURFACE AREA FUMED SILICON DIOXIDE POWDER

Fumed silicon dioxide powder with a BET surface area of 20 to 35 m 2 /g, characterized in that a) the number-based median particle diameter is 60 to 150 nm, and b) the proportion of particles with a diameter of 200 nm or more is at most 10%, and c) the proportion of particles with a diameter of up to 60 nm is at most 20%, based in each case on the total number of particles.

INDIUM-TIN MIXED OXIDE POWDER

Indium-tin mixed oxide powder which consists of primary particle aggregates and contains 50 to 90% by weight indium oxide, calculated as In 2 O 3 , and 10 to 50% by weight tin oxide, calculated as SnO 2 . It is produced by atomising a solution of an inorganic indium compound and an organic tin compound and burning it in a flame. It may be used for the production of electrically conductive paints and coatings, solar cells and IR and UV absorbers and in medical technology.

PROCESS FOR PREPARING MIXED METAL OXIDE POWDERS

Process for preparing a mixed metal oxide powder, in which oxidizable starting materials are evaporated and oxidized, the reaction mixture is cooled after the reaction and the pulverulent solids are removed from gaseous substances, wherein as starting materials, at least one pulverulent metal and at least one metal compound, the metal and the metal component of the metal compound being different and the proportion of metal being at least 80% by weight based on the sum of metal and metal component from metal compound, together with one or more combustion gases, are fed to an evaporation zone of a reactor, where metal and metal compound are evaporated completely under nonoxidizing conditions, subsequently, the mixture flowing out of the evaporation zone is reacted in the oxidation zone of this reactor with a stream of a supplied oxygen-containing gas whose oxygen content is at least sufficient to oxidize the starting materials and combustion gases completely.

Process for preparing grit blasting particles coated with titanium dioxide

A process for preparing grit blasting particles coated with titanium dioxide by sinter-fusing titanium dioxide on the surface of grit blasting particles made of a base material. A mixture of finely divided titanium dioxide and grit blasting particles is passed continuously through the flame in a flame reactor, with the aid of conveying air, wherein the titanium dioxide is sinter-fused on the surface of the grit blasting particles over an average residence time of 0.1 to 5 seconds in a temperature range from 600 to 1200° C. An increase in the adhesive bond between metal framework and a facing material made of plastics in dentures can be achieved when metal framework is grit blasted with a grit blasting agent containing titanium dioxide coated grit blasting particles and then the grit blasted and titanium dioxide coated surface is treated with a silane bonding agent.

Doped zinc oxide powder, process for its preparation, and its use

Pyrogenically prepared, doped zinc oxide powder, wherein the doping component comprises at least one oxide from the group aluminum, gallium, indium, germanium, tin and is present in the doped zinc oxide powder in an amount of from 0.005 to 15 wt. %, and wherein the doped zinc oxide powder is in the form of aggregates of primary particles having a mean maximum diameter of from 30 to 400 nm. It is prepared by oxidation from zinc powder and at least one doping agent, wherein the process zones vaporisation, nucleation, oxidation and quenching are passed through and the doping agent is metered in in the nucleation zone, in which the temperature is below the boiling temperature of zinc. The doped zinc oxide powder can be used in electrically conductive lacquers and coatings.

METHOD OF BONDING MATERIALS OF CONSTRUCTION USING NANOSCALE, SUPERPARAMAGNETIC POLY(METH)ACRYLATE POLYMERS

The invention relates to a method of bonding different materials of construction using hybrid materials comprising nanoscale, superparamagnetic, ferromagnetic, ferrimagnetic or paramagnetic powders enveloped or in part not enveloped by poly(meth)acrylates, and to their use.

SILICA COATED ZINC OXIDE PARTICLES OBTAINABLE BY A FLAME PYROLYSIS PROCESS

Zinc silicon oxide particles with a core-shell structure which have a Zn/Si ratio of from 2 to 75, in atom %/atom %, whose fraction of Zn, Si and O is at least 99% by weight, based on the zinc silicon oxide particles, which have a BET surface area of from 10 to 60 m 2 /g, a weight-averaged primary particle diameter of from 10 to 75 nm an average aggregate area of less than 40 000 nm 2 and an average aggregate diameter (ECD) of less than 200 nm, whose core is crystalline and consists of aggregated primary particles of zinc oxide and whose shell surrounds the aggregated zinc oxide primary particles and consists of one or more compounds containing the elements Si and O. Dispersion, coating composition and sunscreen formulation comprise the zinc silicon oxide particles.

PROCESS FOR PREPARING METAL OXIDE POWDERS

Process for preparing a metal oxide powder, in which starting materials are evaporated and oxidized, wherein a metal melt in the form of droplets and one or more combustion gases are fed to the evaporation zone of a reactor, where the metal melt is evaporated completely under nonoxidizing conditions, subsequently, the mixture flowing out of the evaporation zone is reacted in the oxidation zone of this reactor with a stream of a supplied oxygen-containing gas whose oxygen content is at least sufficient to oxidize the metal and the combustion gases completely.

Plastic composite moulded bodies obtainable by welding in an electromagnetic alternating field

The invention relates to plastics composite moldings obtainable via welding in an alternating electromagnetic field, in which the weld is obtained with the aid of a plastics material which comprises nano-scale, magnetic oxidic particles, which are composed of aggregated primary particles, and where the primary particles are composed of magnetic metal oxide domains whose diameter is from 2 to 100 nm in a non-magnetic metal oxide matrix or non-magnetic metalloid oxide matrix.

Dispersion containing pyrogenically manufactured abrasive particles with superparamagnetic domains

An aqueous dispersion containing abrasive particles comprises abrasive particles having superparamagnetic metal oxide domains in a non-magnetic metal oxide or non-metal oxide matrix. The abrasive particles of the aqueous dispersion can have an average particle size of below 400 nm and a BET surface area of 50 to 600 m 2 /g. The dispersion can be produced by dispersing the abrasive particles with an energy of at least 200 kJ/m 3 using a device in which the abrasive particles are first subjected to high pressure, then decompressed through a nozzle so that the abrasive particles collide with one another or against sections of wall in the device. The aqueous dispersion can be used for chemical mechanical polishing (CMP).

Method of bonding materials of construction using nanoscale, superparamagnetic poly(meth)acrylate polymers

The invention relates to a method of bonding different materials of construction using hybrid materials comprising nanoscale, superparamagnetic, ferromagnetic, ferrimagnetic or paramagnetic powders enveloped or in part not enveloped by poly(meth)acrylates, and to their use.

Domaines in a metal oxide matrix

Composite powder with a matrix domain structure, in which the matrix is a metal oxide and is present in the form of three-dimensional aggregates that have at least in one dimension a diameter of not more than 250 nm, the domains consist of metal oxides and/or noble metals in the matrix of an individual metal oxide, wherein the domains consist of at least two metal oxides or at least two noble metals or a mixture of at least one metal oxide and at least one noble metal, and are nanoscale, and in which the composite powder has a volume-specific surface of 60 to 1200 m2/cm3. The composite powder is produced by mixing the precursors of the oxides of the matrix and of the domains, corresponding to the subsequently desired ratio, with a gas mixture containing a combustible gas and oxygen and are reacted in a reactor consisting of a combustion zone and a reaction zone, and the hot gases and the solid products are cooled and then separated from the gases. It may be used as material for magnetic ...

NANOSCALE SUPERPARAMAGNETIC POLY(METH)ACRYLATE POLYMERS

The invention relates to hybrid materials comprising polymers which envelop nanoscale, superparamagnetic, ferromagnetic, ferrimagnetic or paramagnetic powders, to a process for producing these materials and to their use.

Rubber Compound Containing Nanoscale, Magnetic Fillers

Rubber compound containing at least one nanoscale, magnetic filler and at least one non-magnetic filler. Vulcanisable mixture containing the rubber compound and at least one crosslinking agent and/or vulcanisation accelerator. Moulding obtainable from the vulcanisable mixture by heat treatment or action of an electrical, magnetic or electromagnetic alternating field.

USING CURVES TO EMULATE SOFT BODY DEFORMATION

Using curves to emulate soft body deformation in a computer-generated character is disclosed. A method can include accessing a reference model mapped to one or more deformation curves for the character. The reference model can include a mesh of vertices representing a soft body layer of the character. The deformation curve can include multiple sample points selected for mapping. Each mesh vertex on the model can be mapped to each sample point on the curve to establish a relationship between them for deformation. The method can also include receiving a movement of one or more sample points on the curve to a desired deformation position. The method can further include calculating primary and secondary movements of the mesh vertices on the model based on the movements of sample points. The method can move the mesh vertices as calculated to a desired deformation position and output the reference model with the moved vertices for rendering to emulate the soft body deformation of the character. 1. A method for using curves to emulate soft body deformation in computer animation , the method comprising:accessing a reference model mapped to a deformation curve for a computer-generated character, the reference model including a mesh of vertices representing a soft body layer of the character and the deformation curve including a plurality of sample points, wherein each vertex of the model is mapped to each point of the curve;receiving a movement at least one point on the curve;calculating primary movements of the vertices of the model based on the movement of the at least one point on the curve;calculating secondary movements of the vertices of the model based on the movement of the at least one point on the curve;moving the vertices of the model according to the calculated primary and secondary movements; andoutputting the model with the moved vertices for rendering to emulate the soft body deformation of the character.2. The method of claim 1 , wherein calculating primary ...

Dispersion containing pyrogenically produced abrasive particles with superparamagnetic domains

Abrasivpartikel enthaltende Dispersion, die pyrogen hergestellte Partikel enthält, die superparamagnetischen Metalloidoxid-Domänen in einer nichtmagnetischen Metall- oder Metalloxid-Matrix aufweisen. Die Dispersion kann eine mittlere Partikelgröße von weniger als 400 nm und eine BET-Oberfläche von 50 bis 600 m·2·/g aufweisen. Die Dispersion kann hergestellt werden, indem die Abrasivpartikel mit mindestens 200 kJ/m·3· dispergiert werden. Besonders bevorzugt ist eine Vorrichtung, bei der die Abrasivpartikel, unter hohem Druck stehend, über eine Düse entspannt werden und miteinander oder gegen Wandbereiche der Vorrichtung kollidieren. Die Dispersion kann beim chemisch-mechanischen Polieren (CMP) eingesetzt werden. Dispersion containing abrasive particles, which contains pyrogenically produced particles which have superparamagnetic metalloid oxide domains in a non-magnetic metal or metal oxide matrix. The dispersion can have an average particle size of less than 400 nm and a BET surface area of 50 to 600 m · 2 · / g. The dispersion can be produced by dispersing the abrasive particles with at least 200 kJ / m · 3 ·. A device is particularly preferred in which the abrasive particles, under high pressure, are expanded via a nozzle and collide with one another or against wall regions of the device. The dispersion can be used in chemical mechanical polishing (CMP).

Dispersion containing abrasive particles produced by pyrogenesis which contain superparamagnetic domains

SPRAY GUN.

Pistola pulverizadora (1) para la pulverización de pinturas y medios viscosos similares, la cual puede ser accionada por vía neumática o eléctrica y está constituida por una carcasa de pistola (2) destinada a recibir los componentes de la pistola pulverizadora (1) que producen el accionamiento, el mezclado y/o la dosificación, una empuñadura (3) que sobresale de la carcasa (2) de la pistola, un recipiente de reserva (4) fijado a la carcasa (2) de la pistola en forma desmontable y destinado a recibir el medio que se va a procesar, una tuerca de capuchón (10) asentada sobre la carcasa (2) de la pistola o sobre una pieza intermedia unida con ésta o sobre un tubo de prolongación, y una caperuza de aire (11) rodeada por dicha tuerca, que está provista de aberturas de salida (14, 15) para aire comprimido decaladas una respecto de otra, por medio de las cuales se pueden conformar chorros de pulverización diferentes (I, III) y a la que está asociada una boquilla atomizadora (5) sujeta en una situación orientada y destinada a ser abierta por medio de una aguja de boquilla (17), teniendo la tuerca de capuchón (10) o un miembro de retención (31) equivalente a ésta, en dirección periférica, una unión de conjunción de forma con la caperuza de aire (11, 32), caracterizada porque, para el ajuste y la sujeción de la caperuza de aire (32) en una situación orientada, el componente portador del miembro de retención (31), por ejemplo la carcasa (2) de la pistola, o el miembro de retención (31) están provistos de una o varias y preferiblemente dos curvas de control (35, 35'', 35'''', 35'''''') dispuestas diametralmente enfrentadas una a otra, abiertas en un lado y extendidas en dirección periférica, y el miembro de retención (31) o el componente portador de éste están provistos de miembros de guía (36, 36'', 36'''', 36'''''') que sobresalen radialmente hacia dentro o hacia fuera y que encajan ...

Enveloped zinc oxide particles

Zink-Silicium-Oxidpartikel mit einer Kern-Hülle-Struktur, - die ein Verhältnis Zn/Si von 2 bis 75 in Atom-%/Atom-% aufweisen, - deren Anteil von Zn, Si und O wenigstens 99 Gew.-%, bezogen auf die Zink-Silicium-Oxidpartikel, beträgt, - die eine . BET-Oberfläche von 10 bis 60 m<SUP>2</SUP>/g, . einen gewichtsgemittelten Primärpartikeldurchmesser von 10 bis 75 nm, . eine mittlere Aggregatfläche von weniger als 40000 nm<SUP>2</SUP> und . einen mittleren Aggregatdurchmesser (ECD) von weniger als 200 nm aufweisen, - deren Kern kristallin ist und aus aggregierten Primärpartikeln von Zinkoxid besteht und - deren Hülle die aggegierten Zinkoxid-Primärpartikel umgibt und aus einer oder mehreren die Elemente Si und O enthaltenden Verbindungen besteht. Dispersion, Beschichtungszusammensetzung und Sonnenschutzformulierung enthalten die Zink-Silicium-Oxidpartikel. Zinc-silicon oxide particles having a core-shell structure, which have a Zn / Si ratio of from 2 to 75 in atomic% / atomic%, their proportion of Zn, Si and O at least 99% by weight, based on the zinc-silicon oxide particles, is - the one. BET surface area from 10 to 60 m <SUP> 2 </ SUP> / g,. a weight-average primary particle diameter of 10 to 75 nm,. an average aggregate area of less than 40000 nm <SUP> 2 </ SUP> and. have an average aggregate diameter (ECD) of less than 200 nm, - whose core is crystalline and consists of aggregated primary particles of zinc oxide and - whose shell surrounds the agglomerated zinc oxide primary particles and consists of one or more compounds containing the elements Si and O. Dispersion, coating composition and sunscreen formulation contain the zinc-silicon oxide particles.

Surface modified zinc-silicon oxide particles

Oberflächenmodifizierte Zink-Silicium-Oxidpartikel, - die aus einem Kern, einer den Kern umgebenden ersten Hüllschicht und einer die erste Hüllschicht umgebende zweite Hüllschicht bestehen, wobei . der Kern kristallin ist und aus aggregierten Zinkoxid-Primärartikeln mit einem Primärpartikeldurchmesser von 10 bis 75 nm besteht, . die erste Hüllschicht aus einer oder mehreren, die Elemente Zn, Si und O enthaltenden Verbindungen besteht, . die zweite Hüllschicht chemisch an die erste Hüllschicht gebundene lineare und/oder verzweigte Alkylsilylgruppen mit 1 bis 20 Kohlenstoffatomen enthält, - die eine mittlere Aggregatfläche von kleiner als 40000 nm<SUP>2</SUP> und einen mittleren Aggregatdurchmesser (ECD) von kleiner als 300 nm, einen Kohlenstoffgehalt von 0,4 bis 1,5 Gew.-% und eine BET-Oberfläche von 10 bis 60 m<SUP>2</SUP>/g aufweisen. Surface-modified zinc-silicon oxide particles, - consisting of a core, a core surrounding the first cladding layer and a first cladding surrounding the second cladding layer, wherein. the core is crystalline and consists of aggregated primary zinc oxide particles with a primary particle diameter of 10 to 75 nm,. the first cladding layer consists of one or more compounds containing elements Zn, Si and O,. the second cladding layer contains chemically bound to the first cladding layer linear and / or branched alkylsilyl groups having 1 to 20 carbon atoms, - a mean aggregate area of less than 40000 nm <SUP> 2 </ SUP> and a mean aggregate diameter (ECD) of less than 300 nm, have a carbon content of 0.4 to 1.5 wt .-% and a BET surface area of 10 to 60 m <SUP> 2 </ SUP> / g.

Curable bonded assemblies capable of being dissociated

The invention concerns an adhesive composition for producing thermoset products, capable of being heated by means of an electric field, a magnetic field, an electromagnetic field or an alternating electromagnetic field, and containing filler particles which are metallic, ferromagnetic, ferrimagnetic, superparamagnetic or paramagnetic. Said adhesive composition can be hardened under the action of heat to form a high-resistance stable adhesive assembly, said resulting adhesive assemblies capable of being likewise dissociated under the action of heat.

Zinc oxide powder aggregates present in circular, ellipsoidal, linear and branched form

Pyrogenically prepared zinc oxide powder having a BET surface area of from 10 to 200 m²/g, which is in the form of aggregates, the aggregates being composed of particles having different morphologies, and 0-10 % of the aggregates being in a circular form, 30-50 % being in an ellipsoidal form, 30-50 % being in a linear form and 20-30 % being in a branched form. It is prepared by reacting a starting mixture containing zinc vapour, a combustible gas and steam or a mixture of steam and carbon dioxide in a flame with an oxygen-containing gas in an oxidation zone, cooling the hot reaction mixture in a quenching zone and separating the solid material from the gas stream, the amount of oxygen in the oxidation zone being greater than the amount necessary for the complete oxidation of the combustible gas and the zinc vapour. The zinc oxide powder can be used as a constituent of sun protection compositions for protection against UV radiation.

Zinc oxide powder aggregates present in circular, ellipsoidal, linear and branched form

Pyrogenically prepared zinc oxide powder having a BET surface area of from 10 to 200 m /g, which is in the form of aggregates, the aggregates being composed of particles having different morphologies, and 0-10 % of the aggregates being in a circular form, 30-50 % being in an ellipsoidal form, 30-50 % being in a linear form and 20-30 % being in a branched form. It is prepared by reacting a starting mixture containing zinc vapour, a combustible gas and steam or a mixture of steam and carbon dioxide in a flame with an oxygen-containing gas in an oxidation zone, cooling the hot reaction mixture in a quenching zone and separating the solid material from the gas stream, the amount of oxygen in the oxidation zone being greater than the amount necessary for the complete oxidation of the combustible gas and the zinc vapour. The zinc oxide powder can be used as a constituent of sun protection compositions for protection against UV radiation.

Method of bonding materials of construction using nanoscale, superparamagnetic poly(meth)acrylate polymers

The invention relates to a method of bonding different materials of construction using hybrid materials comprising nanoscale, superparamagnetic, ferromagnetic, ferrimagnetic or paramagnetic powders enveloped or in part not enveloped by poly(meth)acrylates, and to their use.

adhesive composition for the production of thermo-rigids, their use, their cure process, adhesive composite, their thermal dissociation processes and the use of said processes.

composite particles of zinc oxide-cerium oxide

Kompositpartikel mit einer BET-Oberfläche von 5 bis 100 m 2 /g enthaltend eine Zinkoxid-Matrix und Ceroxid-Domänen, wobei sich die Domänen in der und auf der Matrix befinden und der Anteil an Zinkoxid 80 bis 98 Gew.-% und der Anteil an Ceroxid 2 bis 20 Gew.-%, jeweils bezogen auf die Kompositpartikel, beträgt. Composite particles having a BET surface area of 5 to 100 m 2 / g containing a zinc oxide matrix and cerium oxide domains, wherein the domains are in and on the matrix and the proportion of zinc oxide is 80 to 98 wt .-% and the proportion to cerium oxide 2 to 20 wt .-%, each based on the composite particles is.

Hand-held power tool

The hand tool has a handle (2) extending from a housing (1), which is itself shaped ergonomically as a hand grip (3) on the side opposite the grinding head. An additional grip piece (4), which is spaced apart from the handle, is connected to the handle by an ergonomically shaped knob (5). The knob is mounted on an arm (6) which can pivot on the housing or slide within it. When the knob is in the folded position or slid within the housing, it matches the contours of the housing to form a continuous surface. When it is folded outwards or withdrawn into the housing, the rear (14) of the grip piece suits the shape of the ball of the thumb.

ZINC OXIDE POWDER AGGREGATES IN CIRCULAR, ELLIPSOIDER, LINEAR AND BRANCHED SHAPES

Apparatus for loosening wallpaper

An apparatus for loosening wallpaper by means of steam, consisting of a steam generator and a steam plate connected to the steam generator by a steam hose, in which the steam generator incorporates a boiler which is closeable by means of a cover provided with a carrying handle and containing an electrical heating element, the carrying handle provided on the cover being thermally separated from the cover. This embodiment ensures that if the apparatus is used correctly, an operator will not come into immediate contact with heated components or hot steam and burns and scalds will be avoided.

Hydrophobic zinc oxide

Hydrophobes Zinkoxidpulver in Form von teilweise oder vollständig umhüllten Aggregaten von Zinkoxidprimärpartikeln mit einem Kohlenstoffgehalt von 0,4 bis 1,5 Gew.-%, bezogen auf das hydrophobe Zinkoxidpulver, und einer BET-Oberfläche von 25 bis 100 m<SUP>2</SUP>/g, wobei - die umhüllten Aggregate zu 0 bis < 10% in einer kreisartigen Form, 15 bis < 30% in einer ellipsoiden Form, 15 bis < 30% in einer linearen Form, 40 bis < 70% in einer verzweigten Form vorliegen und die Summe der verschiedenen Formen 100% beträgt und - die Hülle chemisch gebundene lineare und/oder verzweigte Monoalkylsilylgruppen Si-Alkyl und/oder Dialkylsilylgruppen Si-(Alkyl)<SUB>2</SUB> mit 1 bis 20 Kohlenstoffatomen umfasst. Hydrophobic zinc oxide powder in the form of partially or completely coated aggregates of zinc oxide primary particles having a carbon content of 0.4 to 1.5% by weight, based on the hydrophobic zinc oxide powder, and a BET surface area of 25 to 100 m <SUP> 2 </ SUP> / g, wherein - the coated aggregates are 0 to <10% in a circular form, 15 to <30% in an ellipsoidal form, 15 to <30% in a linear form, 40 to <70% in a branched form and the sum of the various forms is 100%; and - the shell comprises chemically bonded linear and / or branched monoalkylsilyl groups Si-alkyl and / or dialkylsilyl groups Si (alkyl) <SUB> 2 </ SUB> having 1 to 20 carbon atoms.

Electromagnetic field curable adhesive compositions and assemblies which are able to be dissociated

The invention concerns an adhesive composition for producing thermoset products, capable of being heated by means of an electric field, a magnetic field, an electromagnetic field or an alternating electromagnetic field, and containing filler particles which are metallic, ferromagnetic, ferrimagnetic, superparamagnetic or paramagnetic. Said adhesive composition can be hardened under the action of heat to form a high-resistance stable adhesive assembly, said resulting adhesive assemblies capable of being likewise dissociated under the action of heat.

Abrasive grain-containing dispersion, method for producing the same and application of the same

(57)【要約】 【課題】 不均一な研磨を生じさせない研磨砥粒を有す る分散液 【解決手段】 熱分解法により製造された粒子を含有 し、この粒子は非磁性の金属酸化物マトリックス又はメ タロイド酸化物マトリックス内に超常磁性の金属酸化物 ドメインを有していることを特徴とする研磨粒子含有分 散液

Process for preparing a low- surface area fumed silicon dioxide powder

Plastic composite moulded bodies obtainable by welding in an electromagnetic alternating field

The invention relates to plastic composite moulded bodies which are obtainable by welding in an electromagnetic alternating field and whose welding assembling is carried out with the aid of a plastic material containing nanoscale magnetic oxide particles consisting of aggregated primary particles, wherein said primary particles are formed by magnetic metal-oxide domains whose diameter ranges from 2 to 100 nm in a non-magnetic metal-oxide or metalloid-oxide matrix.

Process for thermal decomposition and pre-calcination of barium titanyl oxalate for the production of barium titanate

Nozzle

Superparamagnetic oxidic particles, process for their production and their use

Pyrogene, oxidische Partikel, enthaltend superparamegnetische Metalloxid-Domänen mit einem Durchmesser von 3 bis 20 nm in einer nichtmagnetischen Metall- oder Metalloidoxidmatrix, die einen Chloridgehalt von 50 bis 1000 ppm aufweisen. Sie werden hergestellt durch pyrogene Verfahren, indem man den Vorläufer der superparamagnetischen Domänen und den Vorläufer der nichtmagnetischen Metall- oder Metalloidoxidmatrix in einer Flamme mit Luft und/oder Sauerstoff und Brenngas mischt, dieses Gemisch in einer Flamme zur Reaktion bringt. Die Partikel können zum Beispiel als Ferrofluide verwendet werden. Pyrogenic, oxidic particles containing superparamagnetic metal oxide domains with a diameter of 3 to 20 nm in a non-magnetic metal or metalloid oxide matrix, which have a chloride content of 50 to 1000 ppm. They are produced by pyrogenic processes by mixing the precursor of the superparamagnetic domains and the precursor of the non-magnetic metal or metalloid oxide matrix in a flame with air and / or oxygen and fuel gas, and reacting this mixture in a flame. The particles can be used as ferrofluids, for example.

Process for the preparation of mixed metal oxide powders

Verfahren zur Herstellung eines Metallmischoxidpulvers, bei dem man - oxidierbare Ausgangsstoffe in einer Verdampfungszone eines Reaktors verdampft und im dampfförmigen Zustand in einer Oxidationszone dieses Reaktors oxidiert, - das Reaktionsgemisch nach der Reaktion kühlt und die pulverförmigen Feststoffe von gasförmigen Stoffen abtrennt, wobei man - der Verdampfungszone wenigstens ein pulverförmiges Metall zusammen mit einem oder mehreren Brenngases zuführt, - in der Verdampfungszone das Metall vollständig unter nichtoxidierenden Bedingungen verdampft, - in der Oxidationszone zu dem aus der Verdampfungszone strömenden Gemisch ein Sauerstoff enthaltendes Gas und wenigstens eine Metallverbindung, getrennt oder zusammen, zuführt, wobei der Sauerstoffanteil des Sauerstoff enthaltenden Gases wenigstens ausreicht, um das Metall, die Metallverbindung und das Brenngas vollständig zu oxidieren. Process for the preparation of a mixed metal oxide powder in which - oxidized starting materials in a vaporization zone of a reactor and oxidized in the vapor state in an oxidation zone of this reactor, - the reaction mixture is cooled after the reaction and the powdered solids separated from gaseous substances, wherein - the evaporation zone supplying at least one powdered metal together with one or more combustible gases, - evaporating the metal completely under non-oxidizing conditions in the evaporation zone, - feeding an oxygen-containing gas and at least one metal compound, separately or together, to the mixture flowing from the evaporation zone in the oxidation zone, wherein the oxygen content of the oxygen-containing gas is at least sufficient to completely oxidize the metal, the metal compound and the fuel gas.

Process for the preparation of mixed oxide powders

Verfahren zur Herstellung eines Metallmischoxidpulvers, bei dem man oxidierbare Ausgangsstoffe verdampft und oxidiert, das Reaktionsgemisch nach der Reaktion kühlt und die pulverförmigen Feststoffe von gasförmigen Stoffen abtrennt, wobei man - als Ausgangsstoffe . wenigstens ein pulverförmiges Metall und . wenigstens eine Metallverbindung, . wobei das Metall und die Metallkomponente der Metallverbindung unterschiedlich ist und . wobei der Anteil an Metall wenigstens 80 Gew.-%, bezogen auf die Summe von Metall und Metallkomponente aus Metallverbindung, beträgt, - zusammen mit einem oder mehreren Brenngasen einer Verdampfungszone eines Reaktors zuführt, wo Metall und Metallverbindung vollständig unter nichtoxidierenden Bedingungen verdampft werden, - nachfolgend das aus der Verdampfungszone strömende Gemisch in der Oxidationszone dieses Reaktors mit einem Strom eines zugeführten Sauerstoff enthaltenden Gases zur Reaktion bringt, dessen Sauerstoffanteil wenigstens ausreicht, um die Ausgangsstoffe und Brenngase vollständig zu oxidieren. Process for the preparation of a mixed metal oxide powder in which oxidizable starting materials are vaporized and oxidized, the reaction mixture is cooled after the reaction and the powdered solids are separated from gaseous substances, wherein - as starting materials. at least one powdered metal and. at least one metal compound,. wherein the metal and the metal component of the metal compound is different, and. wherein the proportion of metal is at least 80% by weight, based on the sum of metal and metal component of metal compound, together with one or more fuel gases, feeds to a vaporization zone of a reactor where metal and metal compound are completely vaporized under non-oxidizing conditions; subsequently reacting the mixture flowing from the evaporation zone in the oxidation zone of this reactor with a stream of a gas containing added oxygen, the oxygen content of which is at least sufficient to completely oxidize the starting ...

METHOD FOR BONDING MATERIALS TO NANOSCALYM SUPERPARAMAGNETIC POLY (METH) ACRYLATE POLYMERS

Process for preparing metal oxide powders

Process for preparing a metal oxide powder, in which starting materials are evaporated and oxidized, wherein a metal melt in the form of droplets and one or more combustion gases are fed to the evaporation zone of a reactor, where the metal melt is evaporated completely under nonoxidizing conditions, subsequently, the mixture flowing out of the evaporation zone is reacted in the oxidation zone of this reactor with a stream of a supplied oxygen-containing gas whose oxygen content is at least sufficient to oxidize the metal and the combustion gases completely.

Zinc oxide powder

Vorrichtung zum ablösen von tapeten

Silicium-eisen-mischoxidpulver

Zinkoxidpulveraggregate in kreisförmiger, ellipsoider, linearer und verzweigter form

Dispersion, enthaltend pyrogen hergestellte abrasivpartikel mit superparamagnetischen domänen

Spritzpistole

Zink und mangan enthaltende oxidpartikel

Verfahren zum verkleben von werkstoffen mit nanoskaligen, superparamagnetischen poly(meth)acrylatpolymeren

Durch schweissen im elektromagnetischen wechselfeld erhältliche kunststoffverbundformkörper

Härtbare und wieder lösbare klebeverbindungen

Dotiertes zinkoxidpulver, verfahren zur dessen herstellung und verwendung

Spritzpistole

Kautschukmasse mit nanoskaligen, magnetischen füllstoffen

Spritzpistole

Spritzpistole

Bei einer Spritzpistole (1) zum Zerstäuben von flüssigen Medien mittels Druckluft, die aus einem mit einem Griffstück (3) versehenen und an eine Druckluftleitung (10) anschließbaren Gehäuse (2), eine an diesem abgestützten Zerstäuberdüse (4) und einer mittels eines Abzugbügels (11) verstellbaren Düsennadel (5) besteht, wobei das Gehäuse (2) mit einer Einlaßöffnung (7) zur Zuführung des zu zerstäubenden Mediums versehen und der Verstellweg des Abzugbügels durch einen einstellbaren Anschlag (21) bestimmbar ist, ist dieser durch eine im Schwenkbereich des Abzugbügels (14) axial verschiebbar angeordneten Platte (23) gebildet, und zur Abstützung der Platte (23) ist eine Stellmutter (31) vorgesehen, die verdrehbar mit dem Gehäuse (2) verbunden ist. DOLLAR A Durch diese Ausgestaltung wird erreicht, daß die Einstellung der Düsennadel (5) und damit des Öffnungsquerschnittes der Zerstäuberdüse (4) durch Begrenzung des Hubes des Abzugbügels (14) auf einfache Weise und in kurzer Zeit vorzunehmen ist. Durch Anlage des Abzugbügels (14) an dem Anschlag (21) ist nämlich die jeweilige Lage der Düsennadel (5) erkennbar, so daß auf das zu verarbeitende Medium abgestimmte Einstellungen leicht zu wiederholen sind.

Zink und mangan enthaltende oxidpartikel

Using curves to perform mesh deformation

Verfahren zur thermischen zersetzung und vorkalzinierung von bariumtitanyloxalat zur herstellung von bariumtitanate

Indium-tin mixed oxide powder

Indium-tin mixed oxide powder which consists of primary particle aggregates and contains 50 to 90% by weight indium oxide, calculated as In203, and 10 to 50% by weight tin oxide, calculated as SnO2. It is produced by atomising a solution of an inorganic indium compound and an organic tin compound and burning it in a flame. It may be used for the production of electrically conductive paints and coatings, solar cells and IR and UV absorbers and in medical technology.

Verfahren zur Herstellung von mit Titandioxid beschichteten Strahlpartikeln

Die Erfindung betrifft ein Verfahren zur Herstellung von mit Titandioxid beschichteten Strahlpartikeln durch Aufsintern von Titandioxid auf die Oberfläche von Strahlpartikeln aus einem Basismaterial. Dabei wird ein Gemisch aus feinteiligem Titandioxid und Strahlpartikeln mit Hilfe von Förderluft kontinuierlich durch die Flamme eines Flammreaktors leitet, wobei bei einer mittleren Verweilzeit von 0,1 bis 5 Sekunden in einem Temperaturbereich von 600 bis 1200 °C das Titandioxid auf der Oberfläche der Strahlpartikel aufsintert. Eine Erhöhung des Haftverbundes zwischen Metallgerüst und Verblendwerkstoff aus Kunststoff in Zahnersatz läßt sich erreichen, wenn man das Metallgerüst mit einem aus erfindungsgemäß mit Titandioxid beschichteten Strahlpartikeln bestehendem Strahlmittel strahlt und anschließend die gestrahlte und mit Titandioxid beschichtet Oberfläche mit einem Silan-Haftvermittler behandelt.

Verfahren zur herstellung von mit titandioxid beschichteten strahlpartikeln

Spritzpistole

Verfahren zur Herstellung von Zinkoxidpulver

Verfahren zur Herstellung von Zinkoxidpulver, umfassend die Schritte a) Erzeugen eines Zinkdampf enthaltenden Stromes in einer Verdampfungszone b) Oxidation des Zinkdampfes durch Reaktion mit einem Sauerstoff enthaltenden Gas unter Bildung von Zinkoxidpulver in einer Oxidationszone, c) Abkühlung des Reaktionsgemisches mittels Wasser oder eines Inertgases und Abtrennung des Zinkoxidpulvers in einer Abkühlungs-/Isolierungszone, wobei man aa) in der Verdampfungszone ein Gasstrom aus einem Inertgas und einem Brenngas durch eine Zinkschmelze, die eine Temperatur von 750°C bis 850°C aufweist, unter Bildung von Zinkdampf leitet, wobei der Anteil an Brenngas 1 bis 50 Vol.-%, bezogen auf die Summe von Inertgas und Brenngas, beträgt und wobei der molare Quotient von Zinkdampf zu Brenngas 0,01 bis 50, beträgt und bb) in der Oxidationszone zu dem Gasstrom aus Zinkdampf, Brenngas und Inertgas einen zweiten Gasstrom gibt, der ein Sauerstoff enthaltendes Gas und Wasserdampf umfasst, in einer Menge gibt, dass die Temperatur in der Oxidationszone 500 bis 1100°C beträgt, wobei - der Gehalt an Sauerstoff wenigstens ausreicht um alles Brenngas aus der Verdampfungszone und den Zinkdampf umzusetzen, der Wasserdampf durch die Reaktion eines Brenngases mit dem Sauerstoff enthaltenden Gas erzeugt wird, das in die Oxidationszone geführt wird.

Device for stripping wallpaper

Process for preparing metal oxide powders

Process for preparing a metal oxide powder, in which starting materials are evaporated and oxidized, wherein a metal melt in the form of droplets and one or more combustion gases are fed to the evaporation zone of a reactor, where the metal melt is evaporated completely under nonoxidizing conditions, subsequently, the mixture flowing out of the evaporation zone is reacted in the oxidation zone of this reactor with a stream of a supplied oxygen-containing gas whose oxygen content is at least sufficient to oxidize the metal and the combustion gases completely.

Verfahren zur Herstellung von mit Titandioxid beschichteten Strahlpartikeln

Surface-modified superparamagnetic oxidic particles

Surface-modified superparamagnetic oxidic particles, characterized by the following physicochemical characteristics : BET surface area 20 to 75 m2/g; Carbon content 0.5 to 6.0% by weight; Tamped density 150 to 500 g/1; Chlorine content 50 to 1000 ppm; Drying loss 0.1 to 4.0% by weight are prepared by contacting the oxides with the surface modifier either by spraying or vapour deposition and then heat-treating them. The surface-modified oxidic particles can be used as a filler in adhesives. Further fields of application are use for data carriers, as a contrast agent in imaging processes, for biochemical separation and analysis processes, for medical applications, as an abrasive, as a catalyst or as a catalyst support, as a thickener, for thermal insulation, as a dispersing assistant, as a flow assistant and in ferrofluids.

Surface-modified superparamagnetic oxidic particles

Surface-modified superparamagnetic oxidic particles, characterized by the following physicochemical characteristics : BET surface area 20 to 75 m2/g; Carbon content 0.5 to 6.0% by weight; Tamped density 150 to 500 g/1; Chlorine content 50 to 1000 ppm; Drying loss 0.1 to 4.0% by weight are prepared by contacting the oxides with the surface modifier either by spraying or vapour deposition and then heat-treating them. The surface-modified oxidic particles can be used as a filler in adhesives. Further fields of application are use for data carriers, as a contrast agent in imaging processes, for biochemical separation and analysis processes, for medical applications, as an abrasive, as a catalyst or as a catalyst support, as a thickener, for thermal insulation, as a dispersing assistant, as a flow assistant and in ferrofluids.

Surface-modified superparamagnetic oxidic particles

Surface-modified superparamagnetic oxidic particles

Surface-modified superparamagnetic oxidic particles, characterized by the following physicochemical characteristics : BET surface area 20 to 75 m2/g; Carbon content 0.5 to 6.0% by weight; Tamped density 150 to 500 g/1; Chlorine content 50 to 1000 ppm; Drying loss 0.1 to 4.0% by weight are prepared by contacting the oxides with the surface modifier either by spraying or vapour deposition and then heat-treating them. The surface-modified oxidic particles can be used as a filler in adhesives. Further fields of application are use for data carriers, as a contrast agent in imaging processes, for biochemical separation and analysis processes, for medical applications, as an abrasive, as a catalyst or as a catalyst support, as a thickener, for thermal insulation, as a dispersing assistant, as a flow assistant and in ferrofluids.

Oberflächlich modifizierte zinkoxid- siliciumdioxid-kern-schale-partikel