Abstract: A microbicidally coated article, especially a container, having on at least part of it a coating comprising an organically modified inorganic matrix comprising silver colloids which is obtainable by application of a coating composition comprising a) a hydrolysate or condensate based on at least one hydrolysable silane with at least one non-hydrolysable substituent and b) a silver compound to the surface of the article and treatment with heat and/or radiation to form the silver colloid coating. Articles coated in accordance with the invention are therefore particularly suitable for purposes of disinfection, preservation, cosmetic, pharmaceutical or medical purposes. Articles from the pharmaceutical or medical sector, especially containers for pharmaceuticals or articles or components which come into contact with the human body and are required to be free from germs, are preferred fields of application.

Abstract: A composition containing transparent thermoplastic polymers and a surface modified oxide particles is disclosed. The size of the particles is less than 200 nm and the composition is suitable for the preparation of products wherever diathermancy is undesirable.

Abstract: A method for producing nanoscale titanium dioxide particles which are coated with an oxide, a hydroxide or an oxide hydroxide of Al, Ce, Zr and/or Si wherein the enzymatic precipitant system urease/urea is used. Said coated titanium dioxide particles can have an average size of less than 50 nm, the coating providing effective protection against photocatalytic reactions. The coated particles are suitable, in particular, as UV absorbers in a transparent organic matrix.

Abstract: A substrate having an anti-adhesive coating thereon. The coating is made from a coating composition comprising solid particles of a release agent different from boron nitride and a binder comprising surface-modified nanoscale solid particles.

Abstract: A composition comprising a blocked and/or unblocked isocyanate compound and surface-modified nanoscale solid particles that comprise on the surface thereof organic radicals which comprise groups with an active hydrogen or precursors of such groups.

Abstract: This invention relates to a catalytic composition which comprises a coating of a coating material on a support and is obtainable by applying the coating material, comprising (1) a polycondensate of at least one hydrolysable organosilane and also, if desired, one or more compounds of glass-forming elements, and (2) particles of one or more transition metal oxides, the weight ratio of transition metal oxide particles to polycondensate being from 10:1 to 1:10, to the support and subjecting the applied coating material to thermal treatment. The invention also relates to a process for preparing this catalytic composition and to its use for the purpose of deodorizing or oxidizing organic components or carbon.

Abstract: A composition with non-Newtonian behaviour which comprises a matrix former and nanoscale solid particles whose surface charge has been increased by reaction with an acid or base, and a process for the preparation thereof. The process is suitable for adjusting the rheology of materials.

Abstract: Nanoscale corundum powders are obtained by first producing an Al2O3 precursor by adding seed crystals to an aqueous solution of an aluminium compound and adding a base and then converting the Al2O3 precursor into corundum by calcination at a high temperature. Before the calcination, the salts that are present in addition to the Al2O3 precursor are separated off. The resulting product is calcined at temperatures of 700 to 975° C. and any fines that may be present are removed. The resulting corundum powders can be sintered at temperatures of ?1200° C. to produce compacts or components of multiple layer systems.

Abstract: The invention relates to nanoscale particles suited especially for use in tumor therapy by hyperthermia. Said particles comprise a (preferably superparamagnetic) iron oxide-containing core and at least two shells surrounding said core. The (innermost) shell adjoining the core is an envelope which comprises groups capable of forming cationic groups and is broken down by human or animal tissue at such a slow rate as to allow for association of the core surrounded by said envelope with the surface of cells and/or for absorption of said core into the inside of cells.

Abstract: Substrates comprising a photocatalytic layer containing TiO2 are produced using TiO2 particles which may optionally be doped with metallic or non-metallic elements or compounds. The photocatalytic layer exhibits a concentration gradient of the TiO2 particles. An organically modified inorganic hybrid layer may be provided between the substrate and the photocatalytic layer.

Abstract: Substrates with a biofilm-inhibiting coating comprising an inorganic condensate modified with organic groups, at least some of the organic groups of the condensate containing fluorine atoms and the coating comprising copper colloids or silver colloids.

Abstract: Processes and compositions for printing substrates. A printing paste containing a matrix-forming precondensate containing polyorganosiloxanes obtained by a sol-gel process and at least one coloring, luminescent, conductive and/or catalytically active filler is applied imagewise to the substrate and is densified by heat treatment at a temperature below the glass transition temperature of the matrix being formed. The processes and printing pastes are suitable, for example, for the production of conductor tracks and decorative patterns.

Abstract: A method is described for producing a microstructured surface relief by applying to a substrate a coating composition which is thixotropic or which acquires thixotropic properties by pretreatment on the substrate, embossing the surface relief into the applied thixotropic coating composition with an embossing device, and curing the coating composition following removal of the embossing device. The substrates obtainable by this method, provided with a microstructured surface relief, are particularly suitable for optical, electronic, micromechanical and/or dirt repellency applications.

Abstract: A substrate has an abrasion-resistant diffusion barrier layer system having: a hard base layer including a coating composition based on a polymer containing reactive surface groups; and a nanostructured topcoat obtained by applying a nanoscale composition comprising sol particles and/or particulate solids to the basecoat and then curing it. The system features good abrasion resistance and diffusion barrier effect, and is particularly suitable as a protective coat for plastic substrates.

Abstract: Components are separated from liquid or gaseous media with the aid of a nanocomposite comprising nanoparticles in a matrix, wherein the liquid or gaseous medium is brought into contact with the nanocomposite in such a way that at least part of the components to be separated off is bound to the nanocomposite and the resulting laden nanocomposite is separated from the liquid or gaseous medium.

Abstract: A coating composition comprises a polycondensate obtained by reacting a prehydrolysate based on at least on epoxide-containing hydrolysable silane; at least one amine component selected from a prehydrolysate based on at least one amino-containing hydrolysable silane and an amine compound containing at least two amino groups; and an amino group protective reagent. The coating composition is particulary suitable for coating glass, glass ceramic, ceramic, and plastic, and permits an increase in strength and protection against damage.

Abstract: Substrates provided with a microstructured surface have a surface layer which (a) comprises a composition comprising condensates of one or more hydrolysable compounds of at least one element M from main groups III to V and/or transition groups II to IV of the Periodic Table of the Elements, at least some of these compounds containing not only hydrolysable groups A but also non-hydrolysable, carbon-containing groups B and the total molar ratio of groups A to groups B in the parent monomeric starting compounds being from 10:1 to 1:2, from 0.1 to 100 mol % of the groups B being groups B′ containing on average from 5 to 30 fluorine atoms which are attached to one or more aliphatic carbon atoms distanced from M by at least two atoms, and (b) has a microstructuring of such kind that the contact angle with respect to water or hexadecane is at least 5° higher than the contact angle of a corresponding smooth surface.

Abstract: A photochromic coating composition contains a silicon-containing precondensate derived from a hydrolysable silane containing a polymerizable functional group on a hydrolysis-stable radical, a photochromic dye, a stabilizer, and nanoscale particles. The coating composition, when applied to transparent plastic and glass substrates and cured, gives a coating having high light stability and good scratch resistance.

Abstract: A process for producing a composite, containing at least one shrinkage-matched ceramic layer, wherein a starting material for the ceramic layer(s) has shrinkage behavior on sintering which is matched to remaining layer(s), and which is selected such that the ceramic-forming constituent of the same contains at least one ceramic powder of a specific size, and which process entails joining the layers of the composite by sintering.

Abstract: The invention relates to powder-coated substrates bearing on a powder-coated surface a scratch-resistant and abrasion-resistant topcoat of a coating material which comprises: a) condensates based on hydrolyzable silanes containing at least one non-hydrolyzable substituent, the hydrolyzable silanes having an epoxide group on at least one non-hydrolyzable substituent; b) a curing catalyst selected from Lewis bases and alkoxides of titanium, zirconium or aluminium; c) nanoscale particulate inorganic solids having a particle size in the range from 1 to 100 nm; and d) at least one organic monomer, oligomer or polymer containing at least one epoxide group.