JPH05255639A - Water-based pigment composition - Google Patents

Abstract

PURPOSE:To obtain a water-based pigment composition composed of a pigment, a water-soluble polymer, a wetting agent, a polyoxyethylene secondary alkyl ether and/or a polyoxyethylene alkyl ether acetate without causing the shading of concentration in a coated surface. CONSTITUTION:The objective water-based pigment composition is obtained by blending (A) preferably 10-50wt.% (based on the total amount of the composition) pigment (e.g. carbon black or titanium oxide) with (B) preferably 5-20wt.% (based on the total amount of the component) water-soluble polymer (e.g. glue, gum arabic or polyvinyl alcohol) as a fixing agent and a vehicle, (C) a wetting agent (e.g. glycerol or ethylene glycol) as an antifreezing agent, a redissolution property improver, etc., and (D) preferably 0.01-3wt.%, especially 0.2-1.5wt.% polyoxyethylene secondary alkyl ether and/or polyoxyethylene alkyl ether acetate for preventing the shading of concentration from occurring in a coated surface, as necessary, adding an extender pigment, a preservative, a rust preventing agent, etc., and mixing the resultant mixture using a disperser such as a three-roll mill.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-based pigment composition such as a poster color or a watercolor paint in which the density of the applied surface is less likely to occur during application.

[0002]

2. Description of the Related Art Aqueous pigment compositions such as poster colors and watercolors are composed of a pigment, a water-soluble polymer and a wetting agent. This water-based pigment composition has a problem in that density is generated on the coating surface coated by using a spray or the like or the coating surface drawn by a paintbrush. It is believed that this is because the background color of the coated surface (often white) acts to emphasize the density of the coated surface.
Therefore, it has been attempted to prevent the occurrence of shading of the density of the coating surface by increasing the blending ratio of the pigment (including the extender pigment) to improve the hiding power and suppress the influence of the surface to be coated as much as possible.

[0003]

However, in the above method, the density of the surface due to the unevenness of the coated surface (which is considered to be uneven coating when using a spray or uneven writing when drawing with a brush) is Since the generation of light and shade cannot be prevented, there has been a demand for a method of preventing light and shade with a higher density.

[0004]

DISCLOSURE OF THE INVENTION The present invention is intended to obtain an aqueous pigment composition in which the density of the coating surface does not vary, and it comprises a pigment, a water-soluble polymer, a wetting agent and a polyoxygen. The subject matter is an aqueous pigment composition comprising at least an ethylene secondary alkyl ether and / or a polyoxyethylene alkyl ether acetate.

The present invention will be described in detail below. The pigment is used as a colorant, and various conventionally known inorganic and organic pigments can be used. Specifically, organic pigments such as carbon black, titanium oxide, red iron oxide, cadmium red, lake red, carmine 3B, 6B, ocher, barium yellow, Hansaello G, 10G, navy blue, ultramarine, phthalocyanine blue, and phthalocyanine green are used. They can be used alone or as a mixture of two or more, and the amount thereof is preferably 10 to 50% by weight based on the total amount of the aqueous pigment composition.

The water-soluble polymer is used as a fixing agent and a color-developing agent, and natural water-soluble polymers such as glue, gum arabic and dextrin and synthetic water-soluble polymers such as polyvinyl alcohol can be used. The amount used is preferably 5 to 20% by weight based on the total amount of the aqueous pigment composition.

The wetting agent is used as an antifreezing agent, a re-solubility improving agent and the like, and examples thereof include glycerin, ethylene glycol, propylene glycol, dipropylene glycol and sorbitol.

The polyoxyethylene secondary alkyl ether and / or polyoxyethylene alkyl ether acetate is used to prevent the occurrence of density variations on the coated surface. These substances may be used alone or in combination of two or more, and the amount thereof is 0.01 to 3.0% by weight, particularly 0.2 to 1.5% by weight, based on the aqueous pigment composition. Is preferred.

The polyoxyethylene secondary alkyl ether is used to prevent the occurrence of density variations on the coated surface. Specifically, Nikkor BT-5 and BT-
7, BT-9, BT-12 (above, manufactured by Nippon Surfactant Chemical Co., Ltd.) and the like.

The polyoxyethylene alkyl ether acetates include Nikkor ECT-3NEX and ECTD.
-3NEX, ECTD-6NEX (above, manufactured by Nippon Surfactant Chemical Co., Ltd.) and the like.

In addition to the above components, extenders such as calcium carbonate and barium sulfate, and additives such as antiseptic / antifungal agents and anticorrosive agents may be appropriately used, if necessary.

The aqueous pigment composition of the present invention can be easily obtained by mixing and dispersing the above components with a disperser such as a three-roll mill or a horizontal ball mill.

[0013]

The polyoxyethylene secondary alkyl ether and / or polyoxyethylene alkyl ether acetate used in the aqueous pigment composition according to the present invention improves the wettability of the pigment surface, and as a result, the aqueous pigment composition. It is presumed that the unevenness of the coated surface is reduced and the occurrence of light and shade of the density of the coated surface is prevented because the fluidity of the coated surface is improved.

[0014]

EXAMPLES In the examples and comparative examples, "parts" simply means "parts by weight" unless otherwise specified.

Example 1 (Poster color) Titanium oxide 40 parts Calcium carbonate 15 parts Arabic gum 10 parts Glycerin 5 parts Water 29 parts Polyoxyethylene 5 mol addition 2 Lauryl ether 5
0% aqueous solution 1 part Put the above ingredients in a lab mixer 1
After stirring for 5 minutes, the product was passed through a three-roll mill twice to obtain a white poster color.

Examples 2 to 4 (poster color) Polyoxyethylene 5 mol addition 2 lauryl ether 50% aqueous solution of Example 1 was added with polyoxyethylene 7 mol, polyoxyethylene 9 mol, and polyoxyethylene 12 respectively. 50% of 2-lauryl ether with molar addition
A white poster color was obtained in the same manner as in Example 1 except that the aqueous solution was used.

Example 5 (Poster color) The same as Example 1 except that 0.2 parts of a 50% aqueous solution of polyoxyethylene 5 mol-added 2 lauryl ether and 29.8 parts of water were used. Then I got a white poster color.

Example 6 (Poster color) Same as Example 1 except that 3.2 parts of a 50% aqueous solution of polyoxyethylene 5 mol addition 2 lauryl ether and water of 26.8 parts in Example 1 were used. Then I got a white poster color.

Example 7 (Poster Color) Balkan Fast Orange GG (C.I. No. 21165) 1 part Hansa Yellow G (C.I. No. 11680) 5 parts Titanium oxide 30 parts Calcium carbonate 18 parts Arabic gum 10 Part glycerin 5 parts water 30 parts polyoxyethylene 12 mol addition 2 stearyl ether 50% aqueous solution 1 part After putting the above ingredients in a lab mixer and stirring for 15 minutes, pass through a three roll mill twice to obtain a skin color poster color It was

Example 8 (Poster color) Same as Example 1 except that the 50% aqueous solution of polyoxyethylene 12 mol-added 2 stearyl ether of Example 5 was changed to a 50% aqueous solution of polyoxyethylene 12 mol-added 2 cetyl ether. I got a skin-colored poster color.

Example 9 (Watercolor paint) Hansa Yellow 10G (C.I. No. 11710) 12 parts Phthalocyanine green (C.I. No. 74260) 1 part Barium sulfate 33 parts Silicon oxide 5 parts Roasted dextrin 15 parts Glycerin 8 parts Water 26 parts Polyoxyethylene 12 mol addition 2 oleyl ether 50% aqueous solution 1 part After putting the above ingredients in a lab mixer and stirring for 15 minutes, pass through a three-roll mill twice to obtain a yellowish green watercolor paint. It was

Example 10 (Poster color) Titanium oxide 40 parts Calcium carbonate 15 parts Gum arabic 10 parts Glycerin 5 parts Water 29 parts Polyoxyethylene 3 mol addition 2 Cetyl ether sodium acetate 50% aqueous solution 1 part Lab above components The mixture was placed in a mixer, stirred for 15 minutes, and then passed through a three-roll mill twice to obtain a white poster color.

Example 11 (Poster color) Balkan Fast Orange GG (C.I. No. 21165) 1 part Hansa Yellow G (C.I. No. 11680) 5 parts Titanium oxide 30 parts Calcium carbonate 18 parts Arabic gum 10 Part Glycerin 5 parts Water 30 parts Polyoxyethylene 6 mol addition 2 50% aqueous solution of sodium stearyl ether acetate 1 part Put the above ingredients in a lab mixer and stir for 15 minutes, then pass through a three-roll mill twice to make a skin-colored poster Got the color.

Example 12 (Watercolor paint) Hansa Yellow 10G (C.I. No. 11710) 12 parts Phthalocyanine green (C.I. No. 74260) 1 part Barium sulfate 33 parts Silicon oxide 5 parts Roasted dextrin 15 parts Glycerin 8 parts Water 26 parts Polyoxyethylene 6 mol addition 50% aqueous solution of sodium oleyl ether acetate 1 part Put the above components in a lab mixer and stir for 15 minutes, then pass through a three-roll mill twice to make a yellowish green watercolor. I got the paint.

Example 13 (Watercolor paint) Hansa Yellow 10G (C.I. No. 11710) 12 parts Phthalocyanine green (C.I. No. 74260) 1 part Barium sulfate 33 parts Silicon oxide 5 parts Roasted dextrin 15 parts Glycerin 8 parts Water 26 parts Polyoxyethylene 6 mol addition 50% aqueous solution of sodium lauryl ether acetate 1 part Put the above ingredients in a lab mixer and stir for 15 minutes, then pass through a three-roll mill twice to give a yellow-green watercolor. I got the paint.

Comparative Example 1 A white poster color was obtained in the same manner as in Example 4 except that 1 part of 50% aqueous solution of 2 lauryl alcohol / ether with 12 mol of polyoxyethylene of Example 4 was replaced with 1 part of water. Got

Comparative Example 2 A skin-colored poster color was obtained in the same manner as in Example 5, except that 1 part of 50% aqueous solution of 2 stearyl alcohol / ether with 12 mol of polyoxyethylene of Example 5 was replaced with 1 part of water. Obtained.

Comparative Example 3 A yellow-green watercolor paint was obtained in the same manner as in Example 7 except that 1 part of 50% aqueous solution of 2 oleyl alcohol / ether with 12 mol of polyoxyethylene added in Example 7 was replaced with 1 part of water. Obtained.

[0029]

[Effect] A coated surface density shading test was conducted on the above Examples 1 to 13 and Comparative Examples 1 to 3. The results are shown in Table 1.

[0030]

[Table 1]

Concentration density test on coated surface The poster colors obtained in the above Examples and Comparative Examples, watercolor paints and water were mixed at a weight ratio of 2: 1 and the surface was coated on Kent paper with a paintbrush. The presence or absence was visually determined. ◎: No shading ○: Almost no shading △: Slight shading ×: Shading

As described in detail above, the aqueous pigment composition according to the present invention is used as a poster color, watercolor paint, etc., and when applied or drawn, no shade of density occurs on the applied surface, and It is also excellent in other characteristics related to the quality of color development, hiding power, poster color such as spread, and watercolor paint.

Claims (1)

[Claims] An aqueous pigment composition comprising at least a pigment, a water-soluble polymer, a wetting agent, and a polyoxyethylene secondary alkyl ether and / or a polyoxyethylene alkyl ether acetate.