Abstract:
A process for coating a substrate is provided which includes the following steps:(a) applying a waterborne base coat composition to a surface of the substrate;(b) applying infrared radiation at a power density of 1.5-8.0 kW/m2 and a first air stream simultaneously to the base coat composition such that a pre-dried base coat is formed upon the surface of the substrate; and(c) applying a second air stream in the absence of infrared radiation to the base coat composition such that a dried base coat is formed upon the surface of the substrate.Various embodiments of the invention are disclosed including continuous, batch, and semi-batch processes, which may include additional process steps, such as subsequent application of a topcoat. The process may be used to coat a variety of metal and polymeric substrates, for example, those associated with the body of a motor vehicle.
Abstract translation:提供一种涂布基材的方法,其包括以下步骤:(a)将水性底漆组合物涂布在基材的表面上;(b)以1.5-8.0kW / m 2的功率密度施加红外辐射, 和第一气流同时施加到底涂层组合物上,使得在基材表面上形成预干燥的底涂层; 和(c)在不存在红外辐射的情况下将第二空气流施加到底涂层组合物,使得在基材表面上形成干燥的基底涂层。本发明的各种实施方案公开,包括连续的,分批的, 批处理,其可以包括额外的工艺步骤,例如随后应用面漆。 该方法可以用于涂覆各种金属和聚合物基底,例如与机动车辆的身体相关的基底。
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 are used to apply heat directly onto the side edges of the board. In addition, catalytic heaters 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 out-gassing 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:
Self-coating or self-layering lacquer systems from at least two different resins, oligomers, or polymers, which are emulsifiable or dispersible in water, have different surface tensions, and form self-layering phases. After the application, the phases separate into the components of the formulation.
Abstract:
A process for the production of a coating layer from a coating composition curable with high-energy radiation on a substrate, comprising the successive steps: a) providing a substrate to be coated, b) applying a backing foil coated on one side with an uncured or at least only partially cured coating layer of a coating composition curable by means of high-energy radiation, with its coated side on the entire surface or at least one sub-zone of the surface of the substrate, c) irradiating the entire coating applied in step b) with high-energy radiation, and d) removing the backing foil from the coating which remains on the substrate; wherein irradiation of the coating proceeds through the backing foil and/or after removal of the backing foil.
Abstract:
An apparatus and method for applying a coating to an object such as a container or an injection blow molded bottle comprising initial staging of an object or container onto an application holding unit, which may employ a grounding pin or mechanism to allow for application of a solvent based coating by electrospray techniques, may further be capable of rotating the object or container during the spray application process and may further employ a positive registration means. The object may be spray coated while on the application holding unit. The object may be transferred to a secondary holding unit and subjecting the coated object to solvent evaporation. Initial curing of the coating by UV or infrared is performed while the object is on the secondary holding unit to the point where the object can rest on its base or a bearing surface without risking a loss of integrity of the coating. Finally, the object may be transferred to a final conveying unit, which may incorporate a positive registration means, for final mass curing by UV, infrared or convention heating.
Abstract:
A method and apparatus for coating sheet material with thermoset material. In certain embodiments, first and second different induction furnaces are provided, with the coated sheet first proceeding into and through the first furnace, and then into and through the second furnace. The first furnace may be maintained at a temperature less than the second furnace, so that out-gassing of volatile materials is achieved in the first furnace and thereafter heightened cross-linking conversation rates are achieved in the second furnace at higher temperature(s).
Abstract:
Process for producing coatings, adhesive films or seals which comprises (1) applying coating materials, adhesives and sealing compounds comprising a constituent (A) which contains groups (a) containing bonds which can be activated with actinic radiation, and also photoinitiators (B), in the form of a water-free and solvent-free liquid or melt, a powder, a powder slurry, a dispersion or a solution in at least one organic solvent, dispersion or solution in an aqueous medium to and/or into a primed or unprimed substrate, (2) drying the powder slurry layer or the layer of a dispersion or solution, or causing the layer of the melt to solidify or maintaining it in the melted state by heating, (3) melting the solid layers by heating, and (4) first irradiating the liquid layers resulting from step (1) of the process or the melted layers resulting from step (2) or (3) of the process in the melted state, during solidification and/or after solidification with near infrared radiation and then fully curing them with UV radiation and/or electron beams or fully curing them simultaneously with NIR radiation and UV radiation and/or electron beams.
Abstract:
Processes for coating metal or polymeric substrates are provided which include the steps of: (a) applying a first powder coating composition to a surface of the substrate; (b) applying a first infrared radiation at a power density of 30 kilowatts per meter squared or less and optionally a first air simultaneously to the first coating composition for a first period of at least about 90 seconds such that a sintered first coating is formed upon the surface of the substrate; (c) applying a second powder coating composition over the first coating; and (d) applying a second infrared radiation at a power density of 30 kilowatts per meter squared or less and a second air at an air velocity ranging from about 0.5 to about 13 meters per second simultaneously to the second coating composition for a second period of at least about 2 minutes, such that a powder layered system is formed upon the surface of the substrate.
Abstract:
The invention relates to a process for repairing coated substrate surfaces comprising the following successive steps: a) optionally, preparing a blemished area to be repaired, b) providing at least one backing film coated on one side with an uncured or at least only partially cured coating layer of a thermally curable coating composition, c) applying the at least one backing film with its coated side onto the blemished area to be repaired, d) supplying thermal energy to the coating applied in this manner onto the blemished area to be repaired and e) removing the at least one backing film, wherein the supply of thermal energy onto the coating proceeds through the at least one backing film, and/or after removal of the at least one backing film.
Abstract:
The invention relates to a method for drying wet or moist coatings on substrates for lamps, in which at least 25%, advantageously more than 50%, of the electromagnetic energy from a thermal radiator which is supplied for drying the coatings lies in the wavelength range between 0.7 and 1.5 nullm. Tubular radiators (5) are used as thermal radiators for generating the electromagnetic radiation.