Abstract:
An electrostatic coating device and an electrostatic coating method each achieve a reduction in working hours and efficient coating at the time when layers are coated with colors. The electrostatic coating device includes a coating material cartridge that includes coating-material containers, a valve that makes a change of colors of coating materials, a common path through which coating materials are able to pass according to the change, and a cleaning circuit that cleans up the common path. The coating material cartridge is configured to be removable from a coating machine. The coating material cartridge may include individual paths respectively connected to the coating-material containers and each of which one of the coating materials passes through, and valves each connected to the common path and respectively connected to the individual paths. Each of the valves may open and close a conduit line between the common path and a corresponding coating-material container.
Abstract:
A process for the production of an OEM base coat/clear top coat multi-layer coating wherein a waterborne base coat composition is spray-applied by electrostatically-assisted high speed rotary atomization, wherein the waterborne base coat composition comprises binder solids comprising about 20 to about 100 wt. % of an aqueously dispersed polyurethane urea resin with a carboxyl number of about 10 to 50 mg KOH/g.
Abstract:
The invention relates to the use of diazonium salts for the formation of thick layers on at least one surface of a substrate. The diazonium salts used in the invention have the following formula (I): wherein R is a group that can be electrochemically reduced in a reversible manner to a cathodic potential between 0 and −1.5 V, E is a spacer chain consisting of at least one aromatic cyclic group having between 5 and 6 links, optionally containing at least one heteroatom preferably selected from N, S, O or P and optionally substituted by at least one group selected from the C1-C5 alkyls and the halogens, r is 1 or 2, m is a whole number between 1 and 5 inclusive, p is a whole number between 1 and 5, and B is a counter-ion. The invention can be especially applied to the field of gas sensors.
Abstract:
A method and apparatus provided for the production of fine fibers by electrospinning fibers by applying an electrical field between a primary electrode and a counter electrode (5) spaced apart from the primary electrode and extending generally parallel thereto wherein at least an operative surface of the primary electrode is coated with a polymer solution (3) and an electric field of sufficient magnitude is generated between the primary electrode and counter electrode to cause the formation of fine fibers (9) in the space between the electrodes. The operative surface of the primary electrode that is coated with polymer solution is made up of appropriate portions of the surfaces of a multitude of operatively semi-submerged, loose (unattached) elements (1, 11, 17, 21) supported on the bottom of a trough (2) or tray or another support member or members (12, 18, 22). Facility is included for causing polymer solution to be applied to the exposed surfaces of the loose elements by causing them to roll in the polymer solution so that they become coated with a thin layer of polymer solution on their surfaces.
Abstract:
A method of applying particles to a backing having a make layer on one of the backing's opposed major surfaces. The method including the steps of: supporting the particles on a feeding member having a feeding surface such that the particles settle into one or more layers on the feeding surface; the feeding surface and the backing being arranged in a non-parallel manner; and translating the particles from the feeding surface to the backing and attaching the particles to the make layer by an electrostatic force.
Abstract:
A method provides a layer of a first liquid on a first area of a surface using an elongate applicator, an elongate gap being formed between the applicator and the surface, the gap being filled with an elongate globule of the first liquid, and an amount of a second liquid being arranged in contact with the applicator and with the globule, the first liquid and the second liquid being immiscible and the first area having a higher wettability for the first liquid than for the second liquid. The method includes applying a relative motion between the applicator and the surface, wherein the amount of second liquid being arranged only on a trailing side of the applicator.
Abstract:
A first method comprises: dissolving a polymer in a terpene, terpenoid, or aromatic solvent to form a polymer solution; dissolving a salt in a polar organic solvent to form a salt solution; and mixing the salt solution and the polymer solution to form a mixture. The salt and the polar organic solvent do not cause substantial precipitation of the polymer upon mixing with the polymer solution. A resulting terpene, terpenoid, or aromatic solvent phase of the mixture is suitable for forming fibers by electric-field-driven spinning from one or more spinning tips onto a target substrate. A composition comprises the terpene, terpenoid, or aromatic solvent phase of the mixture resulting from the method. A second method comprises forming fibers by electric-field-driven spinning of the first composition from one or more spinning tips onto a target substrate. A second composition comprises the fibers formed by the second method.
Abstract:
An electrical field is generated between an application device and an object to be coated. At least one corona electrode associated with the application device is connected to ground, and at least one counter electrode associated with the object is connected at least at intervals to a positive potential. A system for electrostatically coating objects having an application device coating material, and an electrical field device having a high-voltage source which generates an electrical field between the application device and an object to be coated. The field device comprises at least one corona electrode associated with the application device, and at least one counter electrode associated with the object, wherein, during the operation of the device, the at least one corona electrode is connected to ground, and the at least one counter electrode is connected at least at intervals to a positive potential.
Abstract:
The present invention regards nano surfaces and particularly a gradient based nano surface. According to embodiments of the invention a surface bound gradient is created by distributed nanoparticles along a plane surface. This procedure greatly reduces the number of prepared surfaces needed, as well as the methodological error of analysis of adsorption and adhesion phenomena.
Abstract:
The present invention relates to a composition for coating metallic surfaces, comprising a binder component; a corrosion inhibitor polymer based on an ethylenically monocarboxylic and dicarboxylic acid and, if appropriate, further ethylenical monomers, a solvent component, and, if appropriate, crosslinkable components, and also pigment/filler components. The invention further relates to processes for its preparation and also to methods of coating a metallic surface using the composition, to coated metallic surfaces thus obtained, and to the use of the composition as a primer, particularly in coil coating or in atmospheric corrosion control. After drying, the applied layer preferably has a thickness of at least 3.1 μm and is therefore thicker than a typical pretreatment layer.