Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing
Reexamination Certificate
1999-08-31
2001-07-31
Langel, Wayne (Department: 1754)
Chemistry of inorganic compounds
Oxygen or compound thereof
Metal containing
C423S582000
Reexamination Certificate
active
06267944
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a method of prepaing a solution for a titania film by improving the components thereof
2. Prior Art
Heretofore, the prior art has disclosed a meihod in which a solution for titania film is prepared by mixing a compound of a titanium hydrate gel and a peroxide solution, with a solution forming titanium peroxide particles by calcify said compound over 80° C. Same solution for titania film thus calcined and dried has the excellent effect of adhering to a substrate when coated thereon.
When exposed to weak ultraviolet rays emitting from sunlight, a fluorescent lamp and a mercury lamp, said solution coated on a substrate reacts such that noxious substances composed of organic compounds are oxidized and dissolved. Thus, said solution has rapidly gained a reputation on the market as a photoctalyst having, by coating or impregnating therewith, an oxidization reaction excited by ultraviolet rays through a titania film medium.
As described above, by absorbing photo-energy generating from weak ultra-violet rays, a titania film activates on the swfce of a substrate that is coated or impregnated therewith such that pollutants including NOx and CO2 can be abated. In this manner, said solution contributes to improving the effect of purifying air and water, as well as that of antibacterial and disinfecting reactions.
As set forth earlier, a photocatalyst utilizmg a titW a film medium as disclosed by the pnor art requires ultaviolet rays emitted from sunlight, a fluorescent lamp or a mercury lamp. Hence, odization by said photocatalyst fails to sufficiently react where no light source is available. Said photocatalyst has, therefore, a disadvantage that it could not sufficiently disinfect the interior wall of a large structure such as a tunnel, a ballast tank and a dark room, as well as the inside of a night bus body, a chest of drawers or a shoe cabinet.
Under the circumstances, it has been considered vitally important to invent a method of providing a titania film without requiring any light source as referred to above, or such of applying the film with an antibacterial metal medium.
SUMMARY OF THE INVENTION
The invention provides a method of preparing an improved solution for forming a titania film in such that particles of capsicin, magnetite and tourmaline, as wel as a silica solution, each diluted in distilled water, are compounded with a base comprising a compound of a titanium hydrate gel and a peroxide solution, and a solution fobrming titanium peroxide particles by calcining said compound at a temperature higher than 80° C.
In case a protective film is formed on the surface of a substrate coated or impregnated with a solution of the invention, said film serves as a photocatalyst reacting without any extenor light source. It is, therefore, an object of the invention to provide a metod of preparing an improved solution for titania film having, like a photocatalyst, the effect of exciting anti-bacterial, or mold-proof reactions, as well as abatement and purification of air pollution even when applied where no ultraviolet light is emitted. Hence, it can be applied to the interior suffice of a large strucure being exposed to no light, such as a tunnel, a ballast tank etc.
Another object of the invention is to prepare an improved solution for titania film having the effect of exciting anti-bacterial, or mold-proof reactions, as well as abatement and purification of air pollution, even when applied to the interior suces of a variety of such articles as normally positioned where no light source is available, such as a wardrobe in home, a locker in school, as well as shoes etc.
Further, another object of the invention is to prepare an improved solaion for titania film having the excellent insectcidal effect by making use of capsicin; hence rats and ants are prevented from damaging electric wire circuits resulting in a computer trouble.
And, a firthr another object of the invention is to prepare an improved solution for titania film preventing barnacles and oysters from adhering to culture nets or fixed shore nets being deposited deep in the sea where no ultraviolet light reaches, so contributing to encouraging the fishery industry.
DETAILED DESCRIPTION
According to the invention, a solution for forming a titania film is prepared in such a method that particles of capsicin, magnetite and tourmaline, as well as a silica solution, each diluted in distilled water, are compounded with a base comprising a compound of a titanium hydrate gel and a peroxide solution, and a solution forming titanium peroxide particles by calcining said compound at a temperature higher than 80° C.
Said base being neutral or around pH 7 is suble for applying to a nonacid resisting substrate. Further, same base can be produced cheaply, yet excels in adhering to a substrate. It is offered to market under the brand names of “Peroxo-titanium (PTA solution)”, “Peroxo-anatase sol (PS sol)” and “TPX sol”, respectively.
The invention utilizes as a base the liquid for formng titania film being publicly offered under the brand name of “TPX sol”. Into said liquid formng titania film, particles of capsicin, magnetite and tourmaline, as well as a silica solution all diluted in distilled water are compounded, respectively. Said TPX sol is offered as a solution containing 0.85 wt. % titanium peroxide, diluted by 91.5 wt. % of distilled water.
In this case, said capsicin solution being mixed with other components is preferably prepared within the range from 0.01 to 15 wt. % by application of the solution of the invention. The amount of capsicin in its raw material varies by natural conditions such as its country of origin and kind. Hence, the density of capsicin solution is not necessary confined in its application to above-mentioned range.
Likewise, said solution of magnetite particles being mixed with other components is preferably prepared witn the range from 10 to 40 wt. % by application of the solution of the invention. However, the density of the solution of magnetite particles is not confined in its application to above-mentioned range.
And likewise, said solution of tourmalie particles being mixed with other components is preferably prepared within the range from 0.5 to 15 wt. % by application of the solution of the invention. However, the density of the solution of totalix particles is not confined in its application to above-mentioned range.
Further, said silica solution being mixed with other components is preferably prepared within the range from 1 to 5 wt. % by application of the solution of the invention. However, the density of the silica solution is not confined in its application to above-mentioned range.
Magnetite particles comprised in the solution of the invention generate electromagnetic waves of different wavelength (a light source), when some energy is added to, or taken from electrons of said magnetite departing from the natural orbit thereof. Accordingly, a very small amount of ultraviolet light emitted from said electromagnetic wave affects titanium oxide such that its oxidization is excited.
In the meanwhile, the particles of tourmaline consisting of the solution of the invention have at its lattices some magnetic polarity that is charged with electricity when pressure is added thereto, thus irradiating light. With light thus irradiated, said tourmalne particles contribute to exciting oxidization of titanium oxide.
Any photocataryst as heretofore disclosed by the prior art has no antibacterial or anti-mold effect unless exposed to ultraviolet rays. However, no source of light such as sunlight or a fluorescent lamp is required of any substrate which is coated or impregnated with the solution of the invention. In this case, the antibacterial anti-mold effects, as well as air and water purification are enhanced with oxidization excited by the solution of the invention.
REFERENCES:
patent: 3139325 (1964-06-01), Takada
patent: 5593737 (1997-01-01), Meinzer et al.
patent: 5689798 (1997-11-01), Oeste
patent: 5874701 (1999-02-01), Watanab
Langel Wayne
Morioki Sangyo Company Limited
Staas & Halsey , LLP
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