Abstract:
A painted polyacetal article comprises a polyacetal substrate comprising 90-99.5 wt % polyacetal and 0.5-10 wt % of semicrystalline or amorphous thermoplastic non-polyacetal resin of molecular weight 1,000-50,000; and a paint applied to the polyacetal substrate from a solvent-borne, water-borne or powder 1K paint system onto a surface of the polyacetal substrate pretreated to enhance exposure of said semicrystalline or amorphous thermoplastic non-polyacetal resin of the substrate to the applied paint. The paint is a thermoplastic or partly thermoplastic non-thermosetting paint. A layer of thermosetting paint or varnish can be applied over the thermoplastic paint. The painted polyacetal article has improved paint adhesion and good retained physico-mechanical properties.
Abstract:
An in-situ method for repairing a thermal barrier coating deposited on a component that has suffered localized spallation including depositing a ceramic paste on a surface area of the component exposed by the localized spallation, the ceramic paste including a ceramic material in a binder material, the ceramic material including solid zirconia particles, the binder material including a silicone compound. The method also including heating the binder material to yield a repair coating that covers the surface area of the component, the silicone compound promoting the bonding of the solid zirconia particles.
Abstract:
A hydrosilyl radical-bearing organosilicon compound is applied to a substrate which has been coated with an aliphatic unsaturated hydrocarbon radical-bearing material, whereupon reaction takes place between the coating of aliphatic unsaturated hydrocarbon radical-bearing material and the hydrosilyl radical-bearing organosilicon compound. A fully durable functional coating is formed on the substrate surface. The method can modify surfaces of plastics, metals, ceramics, pottery and glass substrates for imparting functions such as water repellent, hydrophilic, anti-staining or electroconductive properties thereto.
Abstract:
Various embodiments of the invention present techniques for forming structures via a combined electrochemical fabrication process and a thermal spraying process or powder deposition processes. In a first set of embodiments, selective deposition occurs via masking processes (e.g. a contact masking process or adhered mask process) and thermal spraying or powder deposition is used in blanket deposition processes to fill in voids left by selective deposition processes. In a second set of embodiments, after selective deposition of a first material, a second material is blanket deposited to fill in the voids, the two depositions are planarized to a common level and then a portion of the first or second materials is removed (e.g. by etching) and a third material is sprayed into the voids left by the etching operation. In both embodiments the resulting depositions are planarized to a desired layer thickness in preparation for adding additional layers.
Abstract:
The invention relates to a method for producing bioactive implant surfaces consisting of metallic or ceramic materials, to be used for implants such as artificial joints or very small implants such as so-called stents. The invention also relates to implants produced according to this method.
Abstract:
The present invention provides an improved aqueous alkaline zincate solution comprising hydroxide ions, zinc ions, nickel ions and/or cobalt iron ions, copper ions, and at least one inhibitor containing one or more nitrogen atoms, sulfur atoms, or both nitrogen and sulfur atoms provided said nitrogen atoms are not present in an aliphatic amine or hydroxylamine. The present invention also relates to methods for depositing zincate coatings on aluminum and aluminum alloys comprising applying an immersion zincate coating on an aluminum or aluminum alloy substrates, optionally followed by plating the zincate coated aluminum or aluminum alloy substrate using an electroless or electrolytic metal plating solution.
Abstract:
An improved process for applying a coating by means other than electrodeposition to an untreated ferrous metal substrate is disclosed. The substrate need not be phosphated prior to treatment. The process includes contacting the substrate surface with a Group IIIB and/or IVB metal-containing compound in a medium that is essentially free of accelerators, phosphate, zinc, and polymeric material, and coating the substrate by non-electrolytic means. This composition is then cured by conventional means. Substrates treated by the process of the present invention demonstrate excellent corrosion resistance and are also disclosed herein.
Abstract:
A method comprising: providing a composition comprising a zirconium alkoxide and an acid, wherein the composition is not provided in a coating composition; and applying the composition to a substrate.
Abstract:
The invention relates to a process for depositing a metal on a material. The process comprises the steps of: immersing the material in a deposition solution comprising the metal; inducing a material vibration in the deposition solution having a frequency corresponding to a resonance frequency of the material; inducing a solution vibration in the deposition solution in a direction non-parallel to the material vibration, said solution vibration having a frequency corresponding to the a resonance frequency of the deposition solution, whereby said metal is deposited onto the material. This process results in deposition of metal from the plating bath on the material in a controlled and substantially uniform thickness.
Abstract:
A process and composition for manufacturing printed wiring boards that reduces or eliminates the problem of depositing electroless nickel in through holes that are not designed to be metal plated is provided. Also provided by the present invention is a method and composition for depositing a final finish that is even and bright. The present invention is particularly suitable for the manufacture of printed circuit boards containing one or more electroless nickel-immersion gold layers.