Coating processes – Electrical product produced
Reexamination Certificate
1999-11-12
2001-07-03
Parker, Fred J. (Department: 1762)
Coating processes
Electrical product produced
C427S356000, C427S421100, C427S429000, C106S157200, C106S159100, C106S472000
Reexamination Certificate
active
06254922
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a coating material for radiation surfaces to produce electromagnetic waves and a method for manufacturing the coating material.
BACKGROUND OF THE INVENTION
Coating materials of this type are applied to the radiation surfaces of emitters used in energy technologies, in particular refrigeration technology and temperature-control technology. The electromagnetic waves generated through the interaction of the emitter with the coating material to cool down or heat a material placed in the emission field of the emitter.
Heretofore, a coating material for radiation surfaces to produce electromagnetic waves and a method for manufacturing the coating is already known; as disclosed in DD-208 029. The coating material is a mixture consisting of binding agent, insulating agent, dispersing agent, water and graphite. A polyvinyl acetate and/or a polyacrylate and/or a polypeptide is used as binding agent, while an insulating soot is used as insulating agent. Graphite, soot and binding agent form electric dipoles in the coating material which emit electromagnetic waves in the excited state. The process for the preparation of this coating material encompasses essentially two steps: the mixing of these substances by means of a stirring apparatus, and the application of pressure to reduce the size of the soot and graphite particles.
Only general statements as to the basic composition of a coating material are however made therein, from which no specific composition of the coating material with good effectiveness with regard to the emission of electromagnetic waves, can be derived.
It is therefore an object of the present invention to provide a coating material of a specific composition and a method of manufacture which produces an effective emission of electromagnetic waves.
SUMMARY OF THE INVENTION
The above objectives are accomplished according to the present invention by providing a coating material consists of 55% to 65% mole fraction of a base material and 35% to 45% mole fraction graphite. The base material contains a mixture of 39% to 49% mole fraction binding agent, 18% to 23% mole fraction insulating agent, 18% to 24% mole fraction dispersing agent, and 12% to 16% mole fraction distilled water. The binding agent is comprised of 64% to 79% mole fraction distilled water, 4% to 6% mole fraction sulfated oil, 0.16% to 0.24% mole fraction or 0.05% to 0.5% mole fraction benzoisothiazolinon, 15% to 19% mole fraction casein, 0.8% to 1.2% mole fraction urea, 2% to 3% mole fraction alkali diluent and 2.5% to 3.5% mole fraction caprolactam. Preparing the coating material includes a first step of mixing together the components of the binding agent. In a second step, the binding agent is mixed with the insulating agent, dispersing agent, and distilled water to form the base material. In a third step, graphite is mixed with the base material. The result is a coating material with a specific composition that has an effective emission of electromagnetic waves when in a state of excitation.
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Flint & Kim, P.A.
Parker Fred J.
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