摘要:
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. The substrates provided with a microstructured surface are particularly suitable as transparent or translucent easy-to-clean systems.
摘要:
The invention relates to a photocatalytically active coating of a substrate, which is composed of a protective layer and photocatalytically active particles that are applied thereto, the protective layer having no photocatalytic activity. The protective layer preferably contains ZrO2 and SiO2.
摘要:
The invention relates to the use of a coating agent that cures at room temperature.In order to provide a room-temperature-curing coating agent for preventing cathodic corrosion and for application as an aerosol or as brush-on paint, it is proposed that the coating agent be produced by the following method: a) Mixing 5 to 95 wt. % metal alkoxide with 5 to 95 wt. % metal pigment, b) Adding a solvent and up to 10 wt. % (relative to the amount of solid matter) of a catalyst, the catalyst being selected from the group consisting of Lewis acids, organic acids and bases, inorganic bases, functional silanes, in particular aminosilanes, inorganic acids, in particular sulphuric or phosphoric acid, phosphates or blocked phosphates, the coating agent being applied onto a metallic substrate and subsequently dried at room temperature.
摘要:
The invention relates to a method of producing a self-cleaning surface on a substrate.To provide a method according to the preamble, with which surfaces can be produced which are self-cleaning indoors as well and even in the dark, it is suggested according to the invention that a coating with hydrophilic surface components be applied to the substrate and a structure formed in the nanometer range or a combined structure in the nano- and micrometer ranges.The invention surprisingly demonstrates that the principles underlying the Lotus effect® apply not only to hydrophobic but also hydrophilic surfaces.
摘要:
The invention relates to phenolic ester compounds.In order to create a new product class which is suited as coating material, a compound is created within the scope of the invention, having a chemical structure of the following formula: [R1—Ph—O]aX(R2)b(R3)c(OR)n-a-b-c where X=Si, Ti, Zr, Mo, Mn, Cr, W, Hf, Ge, Sn, Pb where n=4 or X=B, V, Al, Ga, In where n=3 or X=Zn, Ni, Cu, alkaline earth where n=2 R1=O—H, H, O—Y or an organic side chain Y=an element which is different from or the same as X and has appropriate substituents R2=alkyl group or functional organic side chain R3=an organic side chain which is the same as or different from R2 Ph=aryl group R=alkyl group a is an integer between 1 and n; b=0 or 1 and c=0 or 1, and a+b+c=n. A compound is thus obtained, in which an aryl group is linked into an ester by way of an O—X group. Surprisingly, it was found that materials which resist hydrolysis and are highly stable towards chemicals are obtained by the transesterification of silanes with phenolic compounds.
摘要:
The invention relates to a coating material having catalytic activity for reducing the combustion temperature of soot and organic substances. It also relates to the use of the coating material. In order to create a catalytically active coating material with which an abrasion-proof coating suitable also for optical applications can be produced for the combustion of soot and organic substances, it is proposed within the scope of the invention that the coating material contains at least 20 and less than 50 wt. % of compounds of subgroup metals or of elements of the third and fourth main groups, and between 10 and 80 wt. % of alkali or alkaline earth compounds, the molar proportion of alkali or alkaline earth compounds being higher than the molar proportion of compounds of subgroup metals or of elements of the third and fourth main groups. Surprisingly, the catalytic composition according to the invention permits the production of a colorless, transparent or translucent coating which also shows high abrasion resistance.
摘要:
The invention relates to alkali-resistant sol-gel coatings, a process for producing alkali-resistant sol-gel coatings and use thereof.To provide alkali-resistant sol-gel coatings, a coating is proposed within the scope of the invention that consists of a hydrolysable silane of the compounds TEOS, MTEOS or higher-chain alkyl silanes (di- tri- and tetrafunctional silanes), but preferably TEOS, MTEOS or mixtures thereof and a condensation catalyst based on a) secondary or tertiary bases (e.g. amino, mercaptosilanes) and/or b) Lewis acids as metal alkoxides, such as aluminium alkoxides, zirconium alkoxides and titanium alkoxides where the ratio (in wt. %) of hydroysable silane to condensation catalyst is between 99:1 and 70:30.
摘要:
A coating material, in particular for high temperature applications, comprises a binding agent and at least one filler material, which can be deposited on a metal surface. For this, the binding agent contains at least one siloxane with an organic residual share of less than 25 weight %. It is preferable if the siloxane or siloxanes is (are) cross-linked three and/or four times.
摘要:
A method of producing a layer which is friction-reducing on an elastomeric substrate includes (a) providing an elastomeric substrate; (b) forming a sol by hydrolysis and condensation of at least one silane having a formula: R.sup.1 Si (OR').sub.3 (I) where R.sup.1 is one of a glycidyloxy-functional residue or a mercapto-functional residue and R' is a residue of a lower alkyl group having 1-4 carbon atoms; (c) coating the elastomeric substrate with the sol to form a coating; and (d) curing the coating to form a gel. The method is particularly suited for the coating of rubber surfaces, e.g., wiper blades.
摘要:
An airbag module with an airbag and a tubular gas generator fastened to a module housing is provided. Said tubular gas generator having gas outlet openings along the periphery thereof and can be fastened to the module housing by means of only a clamping ring that is movable over the tubular gas generator and over a section of the module housing. The clamping ring has in axial direction elongated sections being separated from each other and continuing axial in the opposite direction. The module housing has in its bottom an opening for inserting the tubular gas generator, wherein on the module housing below this opening a support for the tubular gas generator is provided. The clamping ring is designed such that said clamping ring reaches below the support after positioning the tubular gas generator with the elongated section by axial moving in direction of the center of the tubular gas generator.