JP3673844B2 - Novel par gloss pigment and coating composition, cosmetic, ink and plastic containing the pigment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a par glossy pigment based on a novel synthetic mica, and a coating composition, a cosmetic, an ink and a plastic containing the par gloss pigment.
[0002]
[Prior art]
A par gloss pigment which gives natural feeling to a par with a natural mica coated with a metal oxide such as iron oxide or titanium oxide is conventionally known. However, this type of conventional par glossy pigment uses only the interference effect and has a limited color tone.
[0003]
On the other hand, synthetic mica is used in a wide range of applications as a base material for paints, cosmetics, plastics, and the like. Synthetic mica has features such as high heat resistance, no impurities, and high whiteness.
Synthetic mica is known to obtain colored synthetic mica by adding various synthetic elements.
[0004]
In the clay handbook, as the color of mica containing a metal element, Co is tetrahedral position-blue, octahedral position-pink, Ni-band green yellow, Mn-dark purple brown, FeII-brown, FeIII-silver gray, Cr-brown. Cu-light brown.
Further, in “Industrial Chemical Journal, Vol. 65, No. 4, 503, 1962”, the color of titanium-containing synthetic mica is described as gray.
[0005]
[Problems to be solved by the invention]
If the colored synthetic mica is used as a base material for a par glossy pigment, various colors can be expressed by a combined action of the mica color of the base material and the interference effect.
As described above, synthetic mica can be colored mica by coordinating Co, Ni, and the like. However, the blue color can be produced by Co, but there is a problem that the color is light.
[0006]
An object of the present invention is to provide a par gloss pigment that uses a novel synthetic mica having an unprecedented color and develops a completely new color by the combined action of the color of the synthetic mica and the interference color.
[0007]
[Means for Solving the Problems]
As a result of diligent research to solve the above problems, the present inventors have synthesized gray mica containing titanium, but by synthesizing it in a reducing atmosphere, synthetic mica that develops a strong blue color is obtained. By using the blue synthetic mica as a base material for a par glossy pigment, the present inventors have succeeded in developing a completely new color by the combined action of blue mica and interference color. Reached.
[0008]
That is, the present invention is characterized in that the synthetic mica is a synthetic mica containing a reduced titanium and exhibiting a blue color in a par bright pigment obtained by coating a synthetic mica with a metal oxide.
[0009]
The reason why the synthetic mica used in the present invention develops a strong blue color has not been sufficiently clarified theoretically. However, it is considered that the reduced titanium causes some light absorption action in the crystal structure of the synthetic mica and exhibits a blue color.
The par glossy pigment of the present invention expresses a completely new glittering feeling because the synthetic mica used in the present invention develops an unprecedented dark blue color, which is due to the combined action of the blue color of mica and the interference color. It is thought to be caused.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described.
As the synthetic mica used in the present invention, for example, fluorine mica such as fluorine phlogopite, fluorine tetrasilicon mica, fluorine teniolite, and isomorphous substitutes thereof can be preferably used, and in particular, fluorine phlogopite is used. preferable.
The synthetic mica production method itself may be any of melt synthesis, hydrothermal synthesis, solid phase reaction, etc., but the melt synthesis method is particularly preferred because of its good crystallinity.
As the melt synthesis method, the melting temperature, which may be either the crucible method or the internal heating method, may be about 1300 ° C to 1600 ° C.
The content of titanium in the synthetic mica production raw material may be 1 to 15% by weight depending on the blue concentration to be obtained.
[0011]
When the synthetic mica production raw material is melted, a reducing atmosphere is required. This may be achieved by injecting a reducing gas at the time of melting or adding a reducing agent such as carbon. In the internal heating type melting method, it is more preferable to use a carbon electrode because it is reducible.
What is necessary is just to select suitably the quantity and reducing conditions of a reducing agent according to the blue intensity | strength made into the objective. As the reduction proceeds, the blue color of the synthetic mica becomes darker, and as the reduction proceeds further, it becomes a black blue color.
[0012]
After melting, it is cooled by a conventional method and crystallized to obtain blue synthetic mica. During cooling, a heat insulating mold may be used for slow cooling.
In order to widen the blue width of the synthetic mica used in the present invention, other coloring elements such as iron, cobalt, nickel, cerium, niobium, holmium, manganese, chromium, pruseodymium, indium, vanadium, neodymium, erbium, etc. are contained. You may let them.
[0013]
The synthetic mica powder used in the present invention should have a smooth surface. Synthetic mica has a hard crystal and is difficult to cleave. Therefore, it cannot be formed into a flake with a smooth surface by an ordinary method, and becomes an irregular powder having a jagged cross section and a surface.
In order to obtain a flaky synthetic mica powder with a smooth surface, finely pulverize a synthetic mica crystal lump that is easily peeled off or, as described above, take out the melt into a heat insulating container and finely crystallize a large crystal. good.
[0014]
In order to obtain a synthetic mica crystal mass that is easy to peel off, for example, when synthetic mica is melt-synthesized, it is preferable to add at least 1% or more synthetic mica fine powder to the synthetic mica melt and solidify and crystallize. Such a synthetic mica crystal lump is easy to peel off, and even if it is fragmented by a normal crusher such as a jojo crusher, it can be avoided that the mica surface is rough and damaged.
[0015]
When the above-mentioned synthetic mica pieces are further pulverized to about 100 microns or less using, for example, a hammer mill, a roll mill, a ball mill, etc., an excessive crushing force is applied to the mica pieces as it is, and it is jagged. An amorphous powder having a cross section and a surface. Therefore, for example, by adding a high-viscosity medium solution such as glycerin, fluid paraffin, ethylene glycol or the like, or cleaving with water pressure, the mica surface can be pulverized without roughening.
[0016]
The synthetic mica used in the present invention is preferably flaky particles having a surface direction diameter of 3 to 100 microns and a thickness of 0.05 to 1 microns. By using such synthetic mica, the luster of the par glossy pigment is improved, the color becomes vivid, and the extra color is not turbid.
The aspect ratio of the synthetic mica is preferably 60 or more, and if it is smaller than this, the interference effect is insufficient and the gloss is difficult to be obtained.
[0017]
The synthetic mica powder may be coated with a metal oxide by a known method. For example, in the method of coating titanium oxide, synthetic mica powder is suspended in a dilute titanic acid aqueous solution, heated to 70 to 100 ° C., and the titanium salt is hydrolyzed to hydrate on the synthetic mica powder. Titanium oxide particles can be deposited and then fired at a high temperature of 700 to 1000 ° C. for production. Examples of the metal oxide used include oxides of titanium, zirconium, iron, chromium or vanadium. These can be used alone or in combination.
[0018]
The metal oxide, preferably titanium dioxide, is preferably rutiled with a rutile agent such as tin chloride. By such rutile conversion, the weather resistance of the pearl luster pigment is improved.
The par gloss pigment of the present invention is a plastic that is mixed with various paints to form a paint composition, or kneaded into various plastics in the same manner as conventional par gloss pigments. Or a colorant for cosmetics, etc., or an ink colorant.
[0019]
【Example】
Next, although an example and a comparative example are given and the present invention is further explained, the present invention is not limited to these examples.
Example 1
100 parts by weight of a composition comprising 18.2% by weight potassium silicofluoride, 4.7% by weight potassium carbonate, 28.2% by weight magnesium oxide, 11.9% by weight aluminum oxide and 37.0% by weight silicon dioxide were oxidized. 10 parts by weight of titanium was added and mixed well. This mixture is put into an alumina crucible, further added with a piece of carbon, covered, melted at 1450 ° C. in an electric furnace, cooled in the furnace, and a blue synthetic mica crystal containing 5% by weight of titanium is obtained. It was.
[0020]
The crystals were made into thin pieces having an average particle diameter of 20 μm, and 20 g of this powder and 400 ml of water were placed in a 1 liter glass container and stirred. Next, 300 ml of titanyl sulfate solution (TiO ₂ 80 g / liter) was added thereto, and the mixture was rapidly heated to 100 ° C. and reacted at this temperature for 3 hours. After completion of the reaction, the mixture was filtered, washed with water, and dried at a temperature of 110 ° C. The obtained powder was fired at 800 ° C. for 1 hour to obtain a par gloss pigment of the present invention. The par gloss pigment, when dispersed in a clear lacquer, exhibited a dark blue color and exhibited a satisfactory glossy luster. This par glossy pigment was a pale mica having a strong interference color with no shade in the shade portion.
[0021]
Example 2
20 g of the powder obtained in Example 1 and 400 ml of water were placed in a 1 liter glass container and stirred. Next, 275 ml of titanyl sulfate solution (TiO ₂ 80 g / liter) was added thereto, and the mixture was rapidly heated to 100 ° C. and reacted at this temperature for 3 hours. After completion of the reaction, the mixture was filtered, washed with water, and dried at a temperature of 110 ° C. The obtained powder was fired at 800 ° C. for 1 hour to obtain a par gloss pigment of the present invention. This par gloss pigment, when dispersed in a clear lacquer, exhibited a red bull and exhibited a satisfactorily glossy glow. This par glossy pigment was a pale mica having a strong interference color without blue in the shade portion.
[0022]
Comparative Example 1
A titanium dioxide-coated mica was produced in the same manner as in Example 1 except that natural muscovite powder was used. When this was dispersed in a clear lacquer, it showed bluish pearl luster, but lacked the vividness of color development compared to the pigment of the invention of Example 1.
[0023]
Example 3: Paint The luster pigment of the present invention obtained in Example 1 was mixed with a thermosetting acrylic melamine resin (Dainippon Ink, Acrydic 47-712 and Super Becamine G82-60 weight ratio). 7: 3 mixture) and sprayed onto a steel plate primed with black enamel (Super Rack F-47, manufactured by Nippon Paint Co., Ltd.), wet-on-wet thermosetting acrylic melamine resin ( Dainippon Ink, Acrydic 44-179 and Super Becamine L117-60 in a 7: 3 weight ratio mixture) The top clear was sprayed and baked at 140 ° C. for 18 minutes.
The coating showed a dark blue iris pearl luster.
[0024]
Example 4: Plastics 4 parts of the inventive luster pigment obtained in Example 1 are mixed with about 100 parts vinyl chloride resin, 40 parts dioctyl phthalate and 3 parts zinc stearate, This was treated for 3 minutes with a kneading roll heated to 165 ° C., and molded into a sheet having a thickness of 0.5 mm.
The translucent reflected light gave a beautiful blue chloride sheet with a deep blue-colored iris pearl luster.
[0025]
Example 5: Cosmetic (lipstick)
Lipstick was prepared from the following composition.
Pigment obtained in Example 1 15 parts Red 226 1 part Fragrance 0.5 parts Lipstick base material 83.5 parts However, as the lipstick base material, the following were blended and used.
Beeswax 15 parts cetyl alcohol 3 parts lanolin 15 parts castor oil 62 parts fluid paraffin 5 parts The lipstick produced in this way showed a deep blue pearl luster.
[0026]
Example 6: Cosmetic (foundation cream)
Pigment obtained in Example 1 20 parts fluid paraffin 25 parts petrolatum 5 parts isopropyl myristate 5 parts stearic acid 2 parts POE (25) monostearate 2 parts yellow iron oxide 2 parts Bengala 1 part talc 5 parts propylene glycol 5 parts glycerin 5 parts fragrance 0.5 parts purified water 22.5 parts The above formulation was uniformly dissolved and mixed at 75 to 80 ° C, and then cooled to 30 ° C to obtain a product. This product exhibited a dark blue color.
[0027]
Example 7: To 100 parts of the ink gravure ink medium, 15 parts of the pigment obtained in Example 1 was added and mixed well to prepare a gravure par ink.
Printing paper printed with this ink showed a flowing iris pearl luster and a dark blue interference color full of luxury.
[0028]
【The invention's effect】
As described above, according to the present invention, by using a new synthetic mica exhibiting a blue color containing reduced titanium, a new pattern that expresses a completely new color due to the combination of dark blue mica and interference color is used. A luster pigment is obtained. As described above, the par gloss pigment of the present invention expresses a remarkable shine that is not seen at all in this kind of conventional par gloss pigment, so it is extremely useful as a new glitter material for paints, plastics, inks and cosmetics. Useful.

Claims (10)

A par glossy pigment in which a metal oxide is coated on a synthetic mica, wherein the synthetic mica is a synthetic mica containing reduced titanium and exhibiting a blue color. The par gloss pigment according to claim 1, wherein the synthetic mica contains titanium melt-synthesized in a reducing atmosphere. The par glossy pigment according to claim 1 or 2, wherein the synthetic mica is a flaky particle having a smooth surface with a diameter in the plane direction of 3 to 100 microns and a thickness of 0.05 to 3 microns. The par glossy pigment according to claim 1 or 3, wherein the synthetic mica has an average aspect ratio of 60 or more. The par glossy pigment according to claim 1 or 4, wherein the metal oxide is rutiled. The par glossy pigment according to claim 5, wherein the metal oxide is titanium dioxide. A par gloss pigment coated with a metal oxide on a synthetic mica, wherein the synthetic mica is blended with a par gloss pigment that is a synthetic mica that contains reduced titanium and exhibits a blue color. A coating composition. A par gloss pigment coated with a metal oxide on a synthetic mica, wherein the synthetic mica is blended with a par gloss pigment that is a synthetic mica that contains reduced titanium and exhibits a blue color. And cosmetics. A par gloss pigment coated with a metal oxide on a synthetic mica, wherein the synthetic mica is blended with a par gloss pigment that is a synthetic mica that contains reduced titanium and exhibits a blue color. Ink. A par gloss pigment coated with a metal oxide on a synthetic mica, wherein the synthetic mica is blended with a par gloss pigment that is a synthetic mica that contains reduced titanium and exhibits a blue color. And plastic.