Compositions: coating or plastic – Coating or plastic compositions – Marking
Reexamination Certificate
2001-06-13
2003-04-08
Bell, Mark L. (Department: 1755)
Compositions: coating or plastic
Coating or plastic compositions
Marking
C106S031690, C106S031940, C106S031730, C106S031840, C106S031600
Reexamination Certificate
active
06544323
ABSTRACT:
This application claims priority of Korea patent Application No. 2001-0007088, filed on Feb. 13, 2001, the content of which is incorporated herein by reference.
BACKGROUND OF THE INVENTION
(a) Field of the Invention
The present invention relates to an aqueous ink composition with metallic glittering, more particularly to an aqueous ink composition with metallic glittering having an excellent glittering appearance, three-dimensional effect, and smooth writing performance.
(b) Description of the Related Art
In order to obtain handwriting having metallic luster such as a gold and silver, various aqueous ink compositions have been proposed using glittering pigments. For example, an aqueous ink composition using aluminum powder pigment was proposed in Japanese Patent Publication No. 7-118592, and an ink composition using pearl pigment was proposed in Japanese Patent Publication No. 8-151547. Japanese Patent Publication No. 11-29734 also proposes metallic aqueous ink prepared by coloring aluminum powder with an organic pigment using a fixer. However, in the case of conventional aqueous ink compositions of prior art, the use of glittering pigment such as aluminum powder pigment, and pearl pigment and the like, can obtain a glittering appearance and three-dimensional effect, but it is not to a desirable level. Also, other methods have been adopted using a coloring method applying colorants such as dyes and pigments, in order to obtain a metallic color, however, this method also results in a loss of glittering effect due to the use of resin during the coloring step.
To resolve the above problems, EP No. 1,038,931 proposes a technique improving the metallic luster of the ink composition using an inorganic pigment coated with a metal. However, because the aqueous glittering ink composition prepared by the above method uses metal-coating inorganic pigment of a large density, it deteriorates the writing aptitude due to the increase in the weight of the ink composition, and has a high possibility of a precipitate form in storage.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide an aqueous ink composition with metallic glittering having a strong glittering appearance greater than the ink composition of prior art, simultaneously having an excellent dispersible nature, without the possibility of a precipitate form due to the light density of the ink composition, as well as handwriting having a vivid three-dimensional effect, or coating film, which is unobtainable in conventional ink compositions.
In order to achieve the above objects, the present invention provides an aqueous ink composition with metallic glittering comprising a metal-coating resin component, a colorant, a water-soluble resin, a water-soluble organic solvent, and water.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention is described in detail as follows.
The present invention, in order to increase the metallic glittering property, can provide an excellent handwriting or coating film art by using a metal-coating resin component coated with more metal than is generally used in aqueous ink compositions having glittering pigments of prior art.
The present invention can also reduce the weight of the ink composition and improve the dispersible nature, due to the use of a metal-coating resin component having light density and small particles, compared with the method using metal-coating inorganic pigment in EP 1 038 931.
The aqueous ink composition with metallic glittering of the present invention comprises a metal-coating resin component, a colorant, a water-soluble resin, a water-soluble organic solvent, and water.
The metal-coating resin component is composed of closely adhering and laminating mutually soluble resin coating film and metallic deposition film, which has electro-conductivity due to the coating of the metallic deposition film. These are composed of closely adhering and laminating mutually metallic deposition film/resin coating film, or resin coating film/metallic deposition film; or may be prepared by repeatedly coating a constituent unit of metallic deposition film/resin coating film. Also, the present invention can prevent falloff of the metallic luster by inhibiting the extreme agglomeration of metallic deposition film closely adhering and laminating a second resin coating film on the resin coating film/metallic deposition film.
These metal-coating resin components may be prepared by a conventional coating method such as the Roll coating method, the Gravure coating method, the Reverse coating method, and the spray coating method etc. An example is described as follows.
First, in order to coat the resin coating film layer on a base film, a suitable coating solution is prepared, and a metallic film is formed by depositing the metal on the base: the metallic film is a closely adhered to the resin coating film and metallic deposition film mutually. Then, the metallic film is peeled and grinded from the base film, and as a result, the metal-coating resin component may be obtained.
In the method above, the resin coating film is coated on the base film applying a release layer, and metallic deposition film is formed on the above film, and then a metal-coating resin component having resin coating film on above and below the metallic deposition of the surface may also be obtained by coating the resin coating film as the same resin coating film or the second resin coating film. In the above method, the resin coating film is coated on the base film applying the release layer, and metallic deposition film is formed on the above film, and then the metal-coating resin component having a repeat unit of resin coating film/metallic deposition film also may be obtained by repeating the same procedure many times, preferably three times.
The base film supports the metallic film formation, and preferably the base film is used, which is inactive in the coating resin. The example of the embodiment of the base film comprises resin such as polyester, polyamide, polyethylene, polypropylene, cellulose acetate, polycarbonate, polyvinyl chloride, fluorinated resin etc.; and cellophane etc.
Also, the release layer more easily releases the metallic film from the base film, which can be used to thermoset the silicone resin as an inert film for the coating resin.
In the present invention, a resin for the resin coating film dissolves in water or organic solvent of ink composition of the present invention, it is preferably the same as the water-soluble resin of the ink composition or resin having compatibility with the resin. For example, the resin may be used, at least one selected from the group consisting of polyvinyl chloride, vinyl chloride, nitro cellulose, cellulose acetic acid, ethyl cellulose, polyvinyl alcohol, casein, gelatin, vinyl chloride-vinyl acetic acid copolymer resin, butyral resin, acryl resin, polyamide resin, polyester resin, and epoxy resin.
The thickness of the resin coating film is from 0.1 to 5 &mgr;m, more preferably from 0.5 to 3 &mgr;m. Wherein, if the thickness is less than 0.1 &mgr;m, it may not obtain a suitable metallic luster due to the difficulty of continuously forming the resin coating film. If the thickness is more than 5 &mgr;m, in the case of the application in ink, paint, and adhesive and the like, there is a lack of metallic luster and falloff of electro-conductivity due to the small ratio of metal component among the total composition.
A metal coating in the resin component may be used, at least one selected from the group consisting of gold, silver, aluminum, copper, nickel, zinc, potassium, indium, and chromium, or metal oxide may be used, such as alloy metal comprising stainless steel or tin oxide, and indium oxide etc. Preferably, when aluminum and copper are used, it has the effect of a metallic luster, electro-conductivity, reducing costs etc.
The coating thickness of the metallic deposition film is 0.02 to 5 &mgr;m, wherein if the thickness is less than 0.02 &mgr;m, the content of the metallic deposition film relative to the content of the resin coati
Bell Mark L.
Dang-A Pencil Co., Ltd.
Faison Veronica F.
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