Abstract: Provided herein is a process for preparing an aqueous dispersion of microparticles containing a water-insoluble, solid, non-polymeric, organic active or functional material (M) and an aminoplast resin (A) which surrounds or embeds material (M). The process includes the following steps: i) providing an aqueous slurry of the material (M) in the form of coarse particles; ii) subjecting the aqueous slurry to shear forces such that the coarse particles of the material (M) are comminuted and an aqueous suspension of fine particles of the material (M) is obtained; and iii) performing a polycondensation of an aminoplast pre-condensate during step (ii) or in the aqueous suspension of the fine particles of the material (M) obtained in step (ii); wherein step (ii) is performed in the presence of at least one protective colloid and in the presence of at least a portion of the aminoplast pre-condensate subjected to the polycondensation of step (iii).

Abstract: Provided herein is a process for preparing an aqueous dispersion of microparticles containing a water-insoluble, solid, non-polymeric, organic active or functional material (M) and an aminoplast resin (A) which surrounds or embeds material (M). The process includes the following steps: i) providing an aqueous slurry of the material (M) in the form of coarse particles; ii) subjecting the aqueous slurry to shear forces such that the coarse particles of the material (M) are comminuted and an aqueous suspension of fine particles of the material (M) is obtained; and iii) performing a polycondensation of an aminoplast pre-condensate during step (ii) or in the aqueous suspension of the fine particles of the material (M) obtained in step (ii); wherein step (ii) is performed in the presence of at least one protective colloid and in the presence of at least a portion of the aminoplast pre-condensate subjected to the polycondensation of step (iii).

Abstract: The invention provides a continuous process for producing polymer-shell nanoparticles, especially in the form of aqueous dispersions, using a high-pressure homogenizer.

Abstract: Described is a monolithic support member comprising channels with walls separating the channels and having a coating deposited thereon, the non-coated channels having a polygonal cross-section profile, wherein the mean thickness dC of the coating in a corner of said cross-section profile is smaller than or equal to the mean thickness dE of the coating on an edge of said cross-section profile plus 85 micrometer. Also described is a method for the preparation of such coated monolithic support member. Further described is the use of such coated monolithic support member as a catalytic article in automotive exhaust gas treatment.

Abstract: The present invention relates to electrodeposition primer compositions comprising catalytically active core/shell particles CS. The electrodeposition primer compositions can be used more particularly for cathodic dip coating for the coating of automobile bodies or parts thereof.

Abstract: The present invention relates to a process for producing hybrid nanoparticles comprising at least one inorganic material and at least one polymeric organic material, comprising at least the steps of (A) providing an emulsion comprising a disperse phase (I) comprising at least one pre-cursor compound of the at least one polymeric organic material and at least one compound which brings about the precipitation of the at least one inorganic material, a continuous aqueous phase (II), and optionally at least one compound which brings about the polymerization of the at least one precursor compound, this being present in the disperse phase (I), in the continuous aqueous phase (II) or in both phases (I) and (II), (B) adding at least one precursor compound of the at least one inorganic material to the emulsion from step (A), so as to form the at least one inorganic material by precipitation in the disperse phase, (C) optionally adding at least one compound which brings about the polymerization of the at least one precu

Abstract: The proposal is made for a process for the preparation of a minisuspoemulsion of submicron core/shell particles, wherein the starting material is a suspoemulsion of a first disperse liquid phase I in a second continuous liquid phase II, which comprises, in the first disperse liquid phase I, submicron particles of a solid C forming the core, and a precursor substance PS for the shell dissolved in molecularly disperse form and, if appropriate, a reactant R, and wherein the submicron core/shell particles CS are prepared in the first disperse liquid phase I of the suspoemulsion by chemical or physical conversion of the precursor substance PS for the shell.

Abstract: The invention provides a continuous process for producing polymer-shell nanoparticles, especially in the form of aqueous dispersions, using a high-pressure homogenizer.

Abstract: An apparatus, for separating liquid droplets out of a feed gas stream, includes a delay vessel for preliminary separation of some of the liquid droplets out of the feed gas stream under gravity, with an inlet line for the feed gas stream and an outlet line for the gas stream which has been depleted of liquid droplets and which flows out of the delay vessel and a tangential supply thereof into a centrifugal droplet separator. The outlet line is arranged in the upper region of the delay vessel and spaced apart from the inlet line to such an extent that the delay time of the gas stream in the delay vessel is at a maximum, and with an outlet line for the liquid separated in the delay vessel at the base thereof.

Abstract: The present invention relates to a compound of the general formula (I) wherein R1 represents a group selected from the list consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, tert-butyl, linear or branched, saturated or mono- or polyunsaturated aliphatic carbon chain containing from two to ten carbon atoms, phenyl, and phenylacetylen, and wherein R2 and R3 independently of each other represent a group selected from the list consisting of Cl, I, methyl, phenyl, or phenylacetylene.

Abstract: The invention provides a process for producing finely divided particles of core-shell structure where the shell comprises at least one polymer, said process comprising the steps of: i. providing a first aerosol stream of droplets in a carrier gas stream wherein the droplets comprise at least one monomer and charging droplets of the first aerosol with electric charge; ii. providing a second aerosol stream of solid particles in a carrier gas stream and charging the solid particles of the aerosol with an electric charge opposite to the electric charge on the droplets of the first aerosol stream; iii. mixing the first aerosol stream with the second aerosol stream to form a mixed aerosol stream; iv. initiating a polymerization of the monomers by irradiating this mixed aerosol stream with electromagnetic radiation. The invention also provides the finely divided particles of core-shell structure which are obtainable by this process.

Abstract: A method for producing nanoscale organic solid particles is proposed, starting from the corresponding sublimable organic solid as raw material, in the form of particles having an average particle diameter in the range of from 1 ?m to 10 mm, which are dispersed in a carrier gas so as to obtain a dispersion, which is relaxed in a convergent nozzle, which is followed by an expansion chamber, and wherein openings are provided rotationally symmetrically about the midaxis of the expansion chamber in the wall of the expansion chamber which comprises the product outlet opening, through which openings a secondary gas flow is injected comprising an inert gas carrier and molecules, ions or nanoscale particles contained in molecularly disperse form therein, which are different from the raw material and which have an average particle diameter that is less than the average particle diameter of the product.

Abstract: The present invention relates to a process for the production of nanoparticles or nanostructured particles with the help of a 2-emulsion method, particles being produced through targeted coalescence of miniemulsions in a high-pressure homogenized.

Abstract: The invention provides a process for preparing isocyanates by reacting amines with phosgene, wherein the amine or a mixture of amine and a solvent is mixed in the form of an aerosol with gaseous phosgene and the amine is subsequently reacted with phosgene.

Abstract: Provided are methods for encapsulating substances. In certain methods, the capsule walls are obtained by interfacial reaction, wherein the interfacial reaction is carried out in a centrifugal reactor with rotating packing.

Abstract: The present invention relates to a method of protecting a substrate against ultraviolet (UV) irradiation by applying to the substrate metal oxide nanocomposite particles showing at the same time high transmittance of visible light and high absorbance of UV light.

Abstract: What is proposed is a centrifugal droplet separator for separating liquid droplets out of a feed gas stream comprising them, with a vertical longitudinal axis and circular cross section, with a jacket (1) and with hoods (2) at the upper and lower ends of the jacket (1), with tangential supply (3) of the feed gas stream comprising liquid droplets at the jacket (1) and with an outlet stub (4) for the liquid separated out in the centrifugal droplet separator in the region of the lower hood (2), and with a gas outlet stub (7) for the gas stream cleaned in the centrifugal droplet separator in the region of the upper hood (2), wherein two, three or more inlet orifices (9) arranged symmetrically on the circumference of the upper hood (2) for tangential supply of cleaning liquid are provided in the same direction as the supply of the feed gas stream comprising liquid droplets.

Abstract: What is proposed is an apparatus for separating liquid droplets out of a feed gas stream comprising them comprising a delay vessel (1) for preliminary separation of some of the liquid droplets out of the feed gas stream under the action of gravity, with an inlet line (2) for the feed gas stream into the delay vessel (1) and an outlet line (3) for the gas stream which has been depleted of liquid droplets and flows out of the delay vessel (1), and tangential supply thereof into a centrifugal droplet separator (4), the outlet line (3) being arranged in the upper region of the delay vessel (1) and being spaced apart from the inlet line (2) to such an extent that the delay time of the gas stream in the delay vessel (1) is at a maximum, and with an outlet line (5) for the liquid separated in the delay vessel (1) at the base thereof, and wherein the centrifugal droplet separator (4) used is an axially symmetric apparatus with a vertical longitudinal axis and circular cross section, with a jacket and hoods at the upp

Abstract: A method is proposed for characterizing a totality of particles. The method can be used in particular for characterizing microparticular or nanoparticular aerosols. The method comprises the following steps: a) in a classification step, a class of the totality is selected, wherein the particles of the selected class have a prespecified mobility dm; b) in a counting step, a number N of the particles of the selected class is determined; c) in a charge determination step, a charge Q of the particles of the selected class is determined; and d) in an evaluation step, at least one morphological parameter is determined from the charge Q, the number N and the mobility dm, wherein the morphological parameter comprises at least one item of information about an agglomerate state of the particles.

Abstract: The present invention relates to a process for the production of nanoparticles or nanostructured particles with the help of a 2-emulsion method, particles being produced through targeted coalescence of miniemulsions in a high-pressure homogenized.