Abstract:
Die vorliegende Erfindung betrifft ein Verfahren zum Pulverlackieren eines Kunststoff- oder Glasgegenstandes, umfassend die Schritte des Ausbildens einer polaren Beschichtung auf dem Kunststoff- oder Glasgegenstand, umfassend den Teilschritt des Aufbringens einer Beschichtungszusammensetzung auf den Kunststoff- oder Glasgegenstand, wobei die Beschichtungszusammensetzung ein Organosiloxan, das mindestens zwei Si-O-Bindungen aufweist, Wasser, ein organisches Lösemittel und ein pH-regulierendes Mittel, ausgewählt aus einer Brönsted-Säure, in einer katalytischen Menge enthält, mit der Maßgabe, dass die Beschichtungszusammensetzung keinen elektrisch leitfähigen Zusatz, ausgewählt aus ionischen Verbindungen, Metallen, Metall(misch)oxiden, intermetallischen Verbindungen und leitfähigem Kohlenstoff, enthält, sowie die Schritte des Aufbringens eines Pulverlacks auf den derartig beschichteten Kunststoff- oder Glasgegenstand und des Erwärmens des Pulverlacks.
Abstract:
An improved process for electrostatically coating a medical device is described. Temporary conductivity is induced into the surface of a medical device whose surface is normally non-conductive. After inducing temporary conductivity to the surface of the device, it is electrostatically coated either through liquid formulation spray coating or through dry powder deposition. The process provides a high degree of uniformity and control over the coating such that the fine features of the device that are necessary for device function are carefully maintained after the coating is applied.
Abstract:
A method and apparatus are provided for curing powdered coatings on the face of porous wood products, such as medium density fibreboard (MDF), wherein a pair of inclined infrared catalytic heaters (56a-56c and 58a-58c) are used to apply heat directly onto the side edges of the board (50). In addition, catalytic heaters (48a-48c) that are normally used to heat and cure the face surface of the board are moved father back to reduce their effectiveness and to limit outgassing of entrapped air from the inner low density core of the board. This arrangement also allows the coating to cure at the side edges of the board at approximately the same rate as the face of the board, promoting a more uniform curing of the powder coating.
Abstract:
The invention relates to a novel method for coating integrated auto body parts containing plastic parts or for cabins of passenger cars and utility vehicles during which the metal parts of the body or of the cabin are provided with an electrodeposition paint coating and are integrated with the plastic parts of the body or of the cabin. These plastic parts already have either an electrically conductive hydroprimer coating, a non-hardened electrically conductive hydroprimer coat, or they are unpainted. In the instance that the plastic parts are not provided with any of these coats, the surface of the integrated body or cabin is uniformly provided with an electrically conductive hydroprimer coating. A bright hydroprimer coat can be applied after a successive hardening of the electrically conductive hydroprimer coating or while the latter is still wet, and said bright hydroprimer coat can be hardened alone or together with the electrically conductive hydroprimer coat. In the instance that the plastic parts are already provided with a coat of this type, the surface of the integrated body or cabin is uniformly provided with a bright hydroprimer coating. A water-based coating is applied to these primer coats and dried thereon. A clear coating is applied in a wet-in-wet manner to the water-based coating, after which the water-based coating and clear coating are baked together, whereby resulting in the novel color-giving and/or effect-giving multilayer coating.
Abstract:
The present invention relates to a powder paint coating method developed for being able to coat the applied surfaces with powder paint of equal thickness and to achieve smooth surface after coating.
Abstract:
The present invention relates to a method for producing non-fouling surfaces and products having such a surface. Especially, the present invention relates to a product comprising a bulk part and a surface region; wherein a first surface region coating is coated on at least a first part of said surface region; said first surface region coating comprising a polyionic co-polymer consisting of a polyionic backbone polymer and non-ionic hydrophilic side chain polymers; wherein the molecular spacing parameter, L/2R g , of said first surface region coating is less than 0.26.
Abstract:
The invention disclosed relates to an aqueous activator solution and a method for the electroless deposition of copper on a laser direct structured substrate surface. By the invention, an aqueous activator solution comprising a strong reducing agent is proposed to enhance the catalytic activity of the irradiated surface area of a LDS substrate.
Abstract:
A method of applying a powder coating to a length of lignocellulosic material such as for example a sheet of paper includes the steps of: (a) impregnating the length of lignocellulosic material with an impregnating composition comprising either: (i) a dicarboxylic anhydride or a tricarboxylic anhydride dissolved in a suitable non-aqueous solvent; or (ii) an isocyanate thermosetting resin dissolved in a suitable non-aqueous solvent; or (ii) a combination of a dicarboxylic anhydride or a tricarboxylic anhydride and an isocyanate thermosetting resin dissolved in a suitable non-aqueous solvent; (b) if necessary removing from the impregnated length of lignocellulosic material any excess of the impregnating composition; (c) removing the non-aqueous solvent or solvents; (d) placing the impregnated length of lignocellulosic material in an electrostatic field or in a fluidized bed and applying a powder coating composition thereto so that the powder coating composition adheres thereto; and (e) then subjecting the length of lignocellulosic material to elevated temperatures to polymerise and/or cross-link the resin or resins in the length of lignocellulosic material and to cure the powder coating composition to form the powder coating.