JP2000290526A - Pearly lustrous pigment, paint composition, cosmetic, ink and plastic containing said pigment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a pigment which has a high corering power and an excellent look and can be industrially produced easily by carrying out titanium oxide coating on a synthesized fluorine gold mica particle in which a part of Al and/or Si, which is the central atom coordinating to an oxygen tetrahedral, is replaced by Fe. SOLUTION: A synthesized fluorine gold mica to be used is shown as the formula: KMg3AlSi3O3gF2. A part of Al and/or Si of this, which is the central atom coordinating to an oxygen tetrahedral, is to be replaced by Fe. The amount of Fe for the replacement is preferably 1-10 wt.% of the weight of the synthesized mica. This Fe-replaced synthesized fluorine gold mica is obtained by, for example, mixing SiO, Al2O3, MgO, FeO and potassium silicofluoride in the composition ratios of the mica to be obtained, then heating and melting the mixture, cooling and crystallizing it and finally crashing it. This synthesized fluorine gold mica is coated with a titanium oxide, preferably rutile titanium dioxide, in the thickness of preferably about 90 nm to obtain a gold color.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel pearly luster pigment having a gold color and a high concealing property using synthetic fluorophlogopite as a substrate, a paint composition containing the pigment, a cosmetic,
It relates to ink and plastic.

[0002]

2. Description of the Related Art Pall gloss pigments using synthetic mica or natural mica as a substrate are used in many fields as pigments exhibiting a pal-like design feeling.

[0003] Pearl luster pigments that emit various interference colors are known, and pearl luster pigments that emit gold interference colors are used in many products because they exhibit a gorgeous design feeling. I have.

Heretofore, pearlescent pigments that produce a gold interference color have been obtained by coating titanium oxide on mica particles with a thickness of about 90 nm.

[0005]

However, there is a drawback that the concealing property is weak only by coating with titanium oxide. For this reason, iron oxide is further coated to enhance the concealing property. However, this method has a drawback that the operation requires a long time because the number of steps is doubled. In addition, the pearly luster pigment obtained by this method has a drawback of poor design.

The present invention has been made in view of such a point, and provides a gold-colored pearl luster pigment having high concealing property, excellent design feeling, and which can be industrially easily produced. The purpose is to:

[0007]

Means for Solving the Problems In order to achieve the above object, the present inventors have made intensive studies and found that a synthesis in which a part of Al and / or Si which is a central atom coordinated to an oxygen tetrahedron is substituted with Fe. The present inventors have found that by coating titanium oxide on fluorophlogopite particles, it is possible to obtain a gold-colored pearly luster pigment having high concealing properties, and reached the present invention.

That is, the present invention is characterized in that titanium oxide is coated on synthetic fluorophlogopite particles in which a part of Al and / or Si which is a central atom coordinated to an oxygen tetrahedron is substituted with Fe. .

[0009]

Next, an embodiment of the present invention will be described.

The raw synthetic mica of the present invention must be synthetic fluorophlogopite, and other mica does not become gold.

The general formula of synthetic fluorophlogopite used in the present invention is represented by the following formula (1).

KMg ₃ AlSi ₃ O ₁₀ F ₂ (1) In the formula, Al and Si are located at the center of the oxygen tetrahedron.
In the synthetic fluorophlogopite used in the present invention, it is necessary that a part of Al and / or Si of the central element coordinated to the oxygen tetrahedron is substituted with Fe. If the substitution is not performed at this position, the effect of the present invention cannot be obtained.

The amount of iron to be replaced is 1% of the weight of synthetic mica.
The content is preferably set to 10 to 10% by weight. If it is less than 1% by weight, the effect is small, and if it exceeds 10% by weight, the crystals of synthetic mica do not grow and remain small.

The synthetic fluorophlogopite obtained by substituting a part of Al and / or Si with Fe used in the present invention can be obtained by a melt synthesis method,
It can be obtained by a solid phase reaction method.

In the melt synthesis method, silicon oxide, aluminum oxide, magnesium oxide, iron oxide, and potassium silicofluoride are mixed in an amount that becomes a composition of the raw material mica of the present invention, and the mixture is mixed to form a mixture of about 150 parts.
It is obtained by heating and melting at 0 ° C., cooling and crystallizing.

Then, the mixture is crushed by an ordinary crusher and a hammer is used.
It is further pulverized using a mill, roll mill, ball mill or the like, and classified into a desired particle size to obtain a raw material synthetic fluorophlogopite powder of the present invention.

In the solid-phase reaction method, iron-free synthetic fluorophlogopite particles and ferric oxide are mixed in an amount which becomes the composition of the raw material mica of the present invention, and the mixture is heated and reacted at about 1000 ° C. The raw synthetic fluorophlogopite particles of the present invention can be obtained.

By coating titanium oxide to a thickness of about 90 nm on the synthetic fluorophlogopite particles obtained by substituting a part of Al and / or Si with Fe obtained as described above, the gold color of the present invention is obtained. New pearlescent pigments of the formula

If it is thinner than this, it becomes silver, and if it is thicker than this, it becomes red and the gold color of the present invention cannot be obtained. About 90 nm means that the thickness becomes 90 nm and a gold color in the vicinity thereof, and if it becomes a gold color, 90 nm may be slightly shifted.

The film thickness of about 90 nm has a particle size of 10 to 60.
It is obtained by mixing 200 μm of synthetic fluorophlogopite powder of 20 μm with a titanyl sulfate solution (TiO ₂ = 80 g / liter) at a ratio of 200 ml.

The titanium dioxide may be coated by a known method such as a hydrolysis method of titanium salt and a sputtering method.

The titanium dioxide used is preferably rutile with a rutile agent such as tin chloride.

The novel pearlescent pigment of the present invention can be mixed with various coatings to form a coating composition, kneaded with various plastics to form a plastic, or used as a coloring agent for cosmetics, etc., in the same manner as the conventional pearlescent pigment. Or a colorant for ink.

Next, the present invention will be further described with reference to examples and comparative examples, but the present invention is not limited to these examples. In the examples, "parts" representing quantities represent "parts by weight".

Example 1 Al and / or S as central atoms coordinated to an oxygen tetrahedron
20 g of synthetic fluorophlogopite powder (iron content: 8%) having a particle size of 10 to 60 μm in which a part of i was replaced with Fe and 400 ml of water were put in a 1-liter glass container and stirred.

Next, a titanyl sulfate solution (Ti
(O ₂ = 80 g / l), 200 ml were added, 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 110 ° C. The obtained powder is fired at 800 ° C. for 1 hour,
A gold pearlescent pigment of the present invention was obtained.

A mixture of 1 g of the pearly luster pigment of the present invention obtained as described above and 15 g of Nitron Clear (manufactured by Musashi Paint) was applied on an opacity measurement paper (approved by the Japan Paint Inspection Association) using an applicator. 4 mils and dried, and the color difference between a white background and a black background was measured.

The measurement was performed using a colorimeter (manufactured by Minolta, CR-
200). The larger the color difference between the white background and the black background, the higher the concealment property.

As a result, the color difference ΔE was 38.43, and the opacity was high.

Example 2 The pearly luster pigment of the present invention obtained in Example 1 was prepared using a thermosetting acrylic melamine resin (manufactured by Dainippon Ink Ink, Acrylic 47-712 and Super Beckamine G821-60 in a weight ratio of 7: 3) Mixture), sprayed onto a steel plate primed with black enamel (Superlac F-47, manufactured by Nippon Paint Co., Ltd.), and wet-on-wet thermosetting acrylic melamine resin (manufactured by Dainippon Ink, Acrylic 44) -179 and Super Beckamine L117-6
The mixture was sprayed and baked at 140 ° C. for 18 minutes.

The resulting coating film was gold and highly concealable.

Example 3 Plastics 4 parts of the pearlescent pigment of the present invention obtained in Example 1 were mixed with about 100 parts of vinyl chloride resin, 40 parts of dioctyl phthalate and 3 parts of zinc stearate and heated to 165 ° C. The mixture was treated with the kneading two rolls for 3 minutes to form a sheet having a thickness of 0.5 mm.

In this way, a beautiful vinyl chloride sheet having a translucent reflected light of a gold color and a high concealing property was obtained.

Example 4: Cosmetic (lipstick) A lipstick was produced from the following composition by a conventional method.

The pigment obtained in Example 1 15 parts Red No. 226 1 part Fragrance 0.5 part Lipstick base material 83.5 parts However, the following lipstick base materials were used in combination.

Beeswax 15 parts Cetyl alcohol 3 parts Lanolin 15 parts Castor oil 62 parts Liquid paraffin 5 parts The lipstick produced in this way exhibited a bright golden pearl luster with high hiding power.

Example 5: Cosmetic (solid eyeshadow) 30 parts of pigment obtained in Example 1 20 parts of synthetic mica 20 parts of talc 35 parts of titanium oxide 5 parts of liquid paraffin 6 parts of methylpolysiloxane 2 parts of sorbitan sesquiolate 2 parts of the above formulation The resulting powder was mixed in a blender, and a liquid in which a binder was uniformly dissolved was added. After mixing, the mixture was pulverized with a pulverizer and compression molded to obtain a product. This product had a high concealing property and an excellent finish.

Example 6: Ink 15 parts of the pigment obtained in Example 1 were added to 100 parts of the gravure ink medium, and mixed well to prepare a gravure pearl ink.

The printing paper printed with this ink showed a golden interference color having high concealing properties and full of sense of quality.

Comparative Example 1 Al and / or S as central atoms coordinated to an oxygen tetrahedron
Synthetic fluorophlogopite powder having a particle size of 10 to 60 μm (part of i is not substituted with Fe element) (iron content 0.01% or less) 20
g and 400 ml of water were stirred in a 1 liter glass container.

Next, a titanyl sulfate solution (Ti
(O ₂ = 80 g / l), 200 ml were added, 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 calcined at 800 ° C. for 1 hour to obtain a gold-colored pearl luster pigment.

For the pearlescent pigment obtained as described above, the color difference between a white background and a black background was measured in the same manner as in Example 1.

As a result, the color difference ΔE was 30.67, and the concealing property was low.

Comparative Example 2: Paint The pearlescent pigment obtained in Comparative Example 1 was used as a thermosetting acrylic melamine resin (Acrylic 47-7, manufactured by Dainippon Ink).
12 and the weight ratio of Super Beckamine G821-60 to 7:
3 mixture), sprayed onto a steel plate primed with black enamel (Superlac F-47, manufactured by Nippon Paint Co., Ltd.), and wet-on-wet thermosetting acrylic melamine resin (Dai Nippon Ink; Acrytic 4
4-179 and Super Beckamine L117-60 in a weight ratio of 7: 3)
Bake for 18 minutes at 40 ° C.

The resulting coating film was gold in color, but had low hiding power.

[0048]

As described above, according to the present invention, a part of Al / Si which has not been conventionally used as a method for producing a gold-colored pearl luster pigment or as a method for enhancing hiding power is replaced with Fe. By adopting this configuration, it is possible to obtain a pearlescent pigment with high hiding power in gold color and excellent design feeling industrially easily, which is a tremendous effect compared to the conventional gold pearlescent pigment. Demonstrate.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C08K 9/02 C08K 9/02 C08L 101/00 C08L 101/00 C09C 3/06 C09C 3/06 C09D 5 / 36 C09D 5/36 11/00 11/00 F term (reference) 4C083 AA082 AA122 AB241 AB242 AB431 AB432 AC022 AC072 AC442 AC862 AD152 AD512 BB26 CC13 CC14 DD21 EE06 FF01 4J002 AA001 DJ056 FB076 GB00 GH01 4J037 AA26 EE03 EE23 EE03 EE03 EE44 FF03 FF09 4J038 EA011 HA546 KA08 KA15 KA20 NA01 4J039 BA10 BA13 BA20 BA21 BA23 BA26 BA29 BA30 BA32 BA35 BA37 BE01 BE33 GA03 GA12

Claims (8)

[Claims] (1) Al which is a central atom coordinated to an oxygen tetrahedron
A gold-colored pearl luster pigment comprising titanium oxide coated on synthetic fluorophlogopite particles in which Si is partially substituted with Fe. 2. The pigment according to claim 1, wherein the titanium oxide is titanium dioxide, and the titanium dioxide is rutile. 3. The pigment according to claim 1, wherein said titanium oxide is coated with a thickness of about 90 nm to give a gold color. 4. The pigment according to claim 1, wherein the amount of iron to be substituted is 1 to 10% by weight based on the weight of the synthetic mica. 5. A coating composition comprising the pigment according to any one of claims 1 to 4. 6. A cosmetic comprising the pigment according to any one of claims 1 to 4. 7. An ink containing the pigment according to any one of claims 1 to 4. 8. A plastic comprising the pigment according to any one of claims 1 to 4.