Abstract:
An apparatus and method for coating glass, and specifically to perfluoroalkoxy copolymer coated glass and a method for manufacturing same. A glass substrate is placed on an electrically grounded support and cleaned with a solvent to remove impurities and prepare the surface of the substrate to be coated. The surface is coated with a primer and an electro-conductive enhancer is uniformly applied to the primer so that the surface of the glass substrate is wet, but not uneven. The perfluoroalkoxy copolymer is powder sprayed on the electro-conductive enhancer while the enhancer is still wet. The perfluoroalkoxy copolymer is secured to the glass substrate by evaporating the electro-conductive enhancer.
Abstract:
An apparatus for powder coating has a coating chamber and a generally horizontal conveyor to electrically ground a article within the coating chamber. A powder dispenser distributes powder within the coating chamber to coat the article.
Abstract:
A method of electrostatically coating a substrate including the steps of applying a surface treatment composition to the substrate to induce conductivity, applying a charge to the substrate after applying the surface treatment and electrostatically applying a coating to the substrate, and articles made therefrom. The surface treatment composition includes a halogen, halogen salt, or halogen complex.
Abstract:
A method of priming a sheet molding compound (SMC) part. The method includes applying a photopolymerizable priming composition to a surface of the SMC part. The priming composition includes a polymerizable component, a photoinitiating component, and a conductive component. The method also includes irradiating the priming composition with light to initiate a polymerization reaction. The priming composition polymerizes on the SMC part substantially without releasing volatile solvents.
Abstract:
A method for electrostatic painting (coating) of a non-conductive polymer surface is disclosed, comprising applying a conductive layer on or adjacent to all or part of a side opposite the non-conductive polymer surface to be painted so as to provide sufficient conductivity to enable electrostatic painting of the non-conductive polymer surface. With the conductive layer in place the article can then be painted electrostatically. After painting, the conductive layer can optionally be removed without affecting the painted surface.
Abstract:
Polyurethane/polyurea polymers can be electrostatically painted without first being coated with a conductive primer. Disclosed is an improvement in a process for electrostatically painting polyurethane/polyurea polymers, the improvement being to prepare the polymer from a formulation including a non-volatile metal salt conductivity inducing material. The polymers of the present invention can be charged with sufficient charge density to permit efficient paint transfer to the polymer surface. Also disclosed is a composition of at least two adjacent layers, one layer being an outer layer of electrostatically applied paint, and the other an inner layer of polyurethane/polyurea polymer.
Abstract:
A process is described which permits the electrostatic coating of nonconducting moldings with thermoplastic or crosslinkable copolyamide hot-melt adhesives.
Abstract:
An atomized fluid, such as a mist of water, is applied to a preheated substrate, such as wood, a wood product, paper, or ceramic just prior to or contemporaneously with electrostatically applying a coating powder to the substrate. The atomized fluid is absorbed or adsorbed by the substrate so as to enhance the charge-carrying capacity of the substrate to an extent necessary to promote efficient electrostatic application of the coating powder to the substrate.
Abstract:
A method for forming coatings of constant thickness on sheets of dielectric substrate (10), which may be curved, includes the step of adhesively applying foil (12) to one side of the dielectric substrate. An electrode (16) is set at a constant distance (D) from the side (10fs) of the substrate to be coated. If the substrate is curved, the electrode is preferably also curved. The region to be coated is evacuated, gaseous precursor materials are infused into the gap, and voltage is applied between the foil (12) and the electrode (16) sufficient to ionize the precursors to a plasma state, whereupon the deposition occurs. The foil may be applied as an adhesive-backed foil. The adhesive may be electrically conductive.
Abstract:
The invention relates to a process for the electrostatic lacquering of non-conductive surfaces. For this purpose, a layer of a conductive organic polymer from the class of the polypyrroles, polyanilines or polythiophenes is applied to the surface and this layer is then electrostatically lacquered.