JPH06191838A - New extender and pigment composition - Google Patents

Abstract

(57) [Abstract] [Purpose] It has excellent properties such as heat resistance, chemical resistance, and weather resistance, and also has properties as conventional extender pigments (transparent or translucent when kneaded with a vehicle, which is almost concealing and coloring. To provide a harmless new extender pigment which is not involved but has the property of being mixed or mixed with a colored pigment to improve rheological properties, optical properties, mechanical strength, etc., and to increase the amount and reduce the cost). [Structure] Chemical formula MAl ₂ O ₄ (where M = Mg or Z
An extender pigment having excellent durability, which has a spinel type crystal structure consisting of n).

Description

Detailed Description of the Invention

[0001]

The present invention relates to extender pigments, especially paints, plastics, inks, rubbers, papers, stationery, ceramics, etc.
The present invention relates to an extender pigment that is useful as a body of any coloring pigment.

[0002]

2. Description of the Related Art Conventionally, various extender pigments are known,
These extender pigments have a small refractive index and become transparent or translucent when kneaded with a vehicle, and hardly contribute to hiding properties and coloring, but when blended or mixed with a colored pigment, they have rheological properties and optical properties. It is a pigment used for the purpose of improving properties, mechanical strength, etc., increasing the amount, and reducing the cost. Various types of extender pigments conventionally used are known, such as calcium carbonate (heavy and sedimentable), clay, kaolin, alumina white, white carbon, barium sulfate, (sedimentable and barite powder), etc. Has been
Used in large quantities.

[0003]

[Problems to be solved by the invention] However,
Since each of these extender pigments has advantages and disadvantages, it is the fact that they are used properly according to each application. For example, calcium carbonate is an extender pigment effective as a filler for paints, printing inks, and rubbers, but it has a problem in chemical resistance and cannot be used in combination with water-based paints or alkali-sensitive pigments (for example, navy blue). Alumina white is used as a lithographic ink, an auxiliary agent for ink, and a substance for rake, but it dissolves in acids and alkalis, and when heated to 100 ° C or higher, it loses part of the water in the structure and changes to a hydrous oxide. In addition, it causes livering when kneaded with oil having a high acid value.

White carbon, clay, kaolin and the like are used as anti-settling agents for paints, inks, rubbers, etc., viscosity modifiers, matting agents and reinforcing materials, but they have properties of thickening and matting. Limited use. Barium sulfate is a substance that is not soaked in acid and alkali, is stable to moisture and hydrogen sulfide gas, and has excellent heat resistance and weather resistance, but its use may be restricted due to toxicity. This is because barium sulfate itself is non-toxic, but when it is used as an extender pigment mixed with a coloring pigment, it becomes difficult to distinguish it from other soluble barium compounds, and its use as a barium compound may be restricted. Is increasing.

Therefore, the object of the present invention is to provide various properties such as heat resistance, chemical resistance, weather resistance, etc., and the properties as a conventional extender pigment (transparent or semitransparent when kneaded with a vehicle to provide hiding and coloring properties). Provide a harmless new extender pigment which has almost no involvement, but has properties such as improvement in rheological properties, optical properties, mechanical strength, etc., increase in quantity and cost reduction when blended or mixed with colored pigments. It is to be.

[0006]

The above object can be achieved by the present invention described below. That is, the present invention provides the chemical formula MAl ₂
An extender pigment having excellent durability, which is represented by O ₄ (where M = Mg or Zn) and has a spinel type crystal structure.

[0007]

According to the present invention, a novel harmless extender pigment having excellent properties such as heat resistance, chemical resistance, weather resistance and the like as a conventional extender pigment is provided.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in more detail with reference to the preferred embodiments. The pigment of the present invention is MAl ₂
It is an inorganic pigment having a chemical formula of O ₄ (where M = Mg or Zn), and has a spinel type crystal structure. This substance belongs to the complex oxide-based calcined pigments, and its production method is oxides of magnesium or zinc or compounds such as hydroxides and carbonates that become oxides by heat, and oxides of aluminum or oxides by heat. After mixing compounds such as hydroxides and carbonates, which are to be burned at a high temperature of 800 to 1,300 ° C., if necessary, to pulverize and remove soluble salts to obtain a powder having a predetermined particle size. It is made through a pigmentation process such as washing with water, drying, and classification. This substance is an extremely stable compound with excellent properties such as heat resistance, chemical resistance, and weather resistance like other baked pigments.
It can be used as a bulking agent for coloring pigments in various applications such as paints, inks, plastics, rubber, stationery, and ceramics, and improves the rheological properties, optical properties and mechanical strength of blended products. You can

[0009]

The present invention will be described in more detail with reference to examples, but the present invention is not limited to the following examples. In addition, hereinafter, various amounts (parts or%) such as blending amounts are based on weight. Example 1 C.I. I. Pigment. Blu
e 15: 3 (Dainichi Seika Kogyo KK trade name Cyanine Blue 4930) was used to add 10% of the extender pigment A of the present invention to prepare a melamine / alkyd type baking paint.
As a comparative example, sedimentary barium sulfate (# 100 manufactured by Sakai Chemical Industry Co., Ltd.) was used as an extender pigment to prepare the same paint, and the suitability of the paint such as particle size and dispersion state was examined and the results shown in Table 1 below were obtained.

Composition: [Dark color] Pigment (Cyanine Blue 4930) 7.2 parts Extender pigment A (MgAl ₂ O ₄ ) 0.8 parts Varnish 20.0 parts Thinner 15.0 parts Glass beads 80.0 parts The above composition The product was dispersed for 90 minutes with a paint shaker, 117.0 parts of varnish was further added, and the mixture was dispersed for 5 minutes with a paint shaker. [Light color] 6.0 parts of the dark enamel obtained above and 26.0 parts of the white enamel were mixed to prepare a light color paint.

[0011]

[Table 1] Results The structural viscosity and the change with time of the above paint are measured by a B-type viscometer (room temperature 25
℃ rotor No. 3 was used to obtain the results in Table 2 below.

[0012]

[Table 2] Results

Example 2 As a yellow color pigment, C.I. I. Pigment. Yel
low 97 (Seika Fast Yellow 2035, trade name, manufactured by Dainichi Seika Kogyo Co., Ltd.) was used, and the extender pigment A of the present invention was used.
Was added to prepare a melamine / alkyd type baking paint. As a comparative example, sedimentary barium sulfate (# 100 manufactured by Sakai Chemical Industry Co., Ltd.) was used as an extender pigment to prepare the same paint, and the suitability of the paint such as particle size and dispersion state was examined and the results shown in Table 3 below were obtained. Composition: [Dark color] Pigment (Seika First Yellow 2035) 5.6 parts Extender pigment B (ZnAl ₂ O ₄ ) 2.4 parts Varnish 11.0 parts Thinner 20.0 parts Glass beads 80.0 parts Disperse the paint shaker for 90 minutes,
Further, 121.0 parts of varnish was added and dispersion treatment was performed for 5 minutes with a paint shaker. [Light color] 6.0 parts of the dark enamel obtained above and 26.0 parts of the white enamel were mixed to prepare a light color paint.

[0014]

[Table 3] Results The structural viscosity and the change with time of the above paint are measured by a B-type viscometer (room temperature 25
℃ rotor No. 3 was used to obtain the results in Table 4 below.

[0015]

[Table 4] Results

Example 3 C.I. I. Pigment. Red
57: 1 (trade name: Seika Fast Carmine 6B 1478, manufactured by Dainichi Seika Kogyo Co., Ltd.) was used, and 30% of the extender pigment A of the present invention was added to prepare an offset ink. As a comparative example, the offset ink was prepared by using precipitated barium sulfate (# 100 manufactured by Sakai Chemical Industry Co., Ltd.) as an extender pigment. Formulation: [Dark color] Pigment (Seika First Carmine 6B 1478) 3.5 parts Extender pigment A (MgAl ₂ O ₄ ) 1.5 parts Resin varnish 20.0 parts The above composition is passed through 3 rolls once and The ink was made into the main kneading three times, and the ink suitability such as dispersibility and color vividness of the ink was examined and the results shown in Table 5 below were obtained.

[0017]

[Table 5] Results

Example 4 C.I. I. Pigment. Blu
e 15: 3 (Cyanine Blue 4927, trade name of Dainichi Seika Kogyo Co., Ltd.) was used, and 30% of the extender pigment B of the present invention was used.
In addition, offset ink was created. As a comparative example, the offset ink was prepared by using precipitated barium sulfate (# 100 manufactured by Sakai Chemical Industry Co., Ltd.) as an extender pigment. Blending: [Dark color] Pigment (Phthalocyanine Blue 4927) 4.5 parts Body pigment B (ZnAl ₂ O ₄ ) 0.5 part Resin varnish 20.0 parts The above composition is passed through a three-roll once and main kneading The ink was formed three times, and the ink suitability such as the dispersibility of the ink and the vividness of the color was examined, and the results shown in Table 6 below were obtained.

[0019]

[Table 6] Results

Example 5 C.I. I. Pigment. Bla
ck 28 (Dainichiseika Kogyo Co., Ltd., trade name: Dipiroxide Black # 9510) is used, and the extender pigment B of the present invention is used.
Was added to prepare a ceramic ink. As a comparative example, an extender pigment was used as a precipitating barium sulfate (Sakai Chemical # 10
0) was used to prepare the same ceramic ink. Blending: [Dark color] Pigment (Dipyroxide Black # 9510) 3.5 parts Extender pigment A (MgAl ₂ O ₄ ) 1.5 parts Frit 25.0 parts Oil 10.0 parts The above composition on 3 rolls 620 ° C after dispersion treatment and coating
After baking for 20 minutes, the ink suitability such as dispersibility and color vividness of the ink was examined and the results shown in Table 7 below were obtained.

[0021]

[Table 7] Results

[0022]

[Effect] According to the present invention as described above, a novel harmless extender pigment having excellent properties such as heat resistance, chemical resistance, and weather resistance, and having the properties as a conventional extender pigment is provided.

Claims (3)

[Claims] 1. An extendable extender pigment characterized by having a chemical formula MAl ₂ O ₄ (where M = Mg or Zn) and having a spinel type crystal structure. 2. The extender pigment according to claim 1, having an average particle diameter of 0.01 μm to 3.0 μm. 3. A pigment composition containing the pigment according to claim 1 as a value.