JPH0593164A - Solid drawing material - Google Patents

Abstract

PURPOSE:To obtain a solid drawing material which can give a highly light- resistant painting or drawing even when pigment is lowly light-resistant by mixing an organic color pigment with titanium oxide, a wax and a piperidine derivative and/or a benzotriazole derivative. CONSTITUTION:A solid drawing material is obtained by using an organic color pigment, titanium oxide, a wax and a piperidine derivative and/or a benzotriazole derivative as essential components. This material can give a highly light-resistant painting or a drawing even when it contains a lowly light- resistant organic color pigment and can be used as crayon, pastel or the like.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a solid drawing material which is used as a crayon, a path, etc. and has a good light resistance of a painted trace.

[0002]

2. Description of the Related Art So-called solid drawing materials such as crayon passes are composed of pigments, waxes and, if necessary, extenders and liquid oils. One of the characteristics required of this solid drawing material is the concealment of the paint trace. This is because a solid drawing material has a rough coating film when drawn as compared with watercolor paints, and thus a beautiful work is unlikely to be made if the hiding property of the coating film is low. Therefore, in order to improve the hiding property, a colored organic pigment and titanium oxide are used in combination. Further, in order to obtain a light intermediate color (pastel color), it is often practiced to use a colored organic pigment in combination with titanium oxide. However, colored organic pigments are generally inferior in light resistance to titanium oxide used in combination.
For this reason, works drawn with a color in which a pigment having particularly low light resistance and titanium oxide are used are often discolored or discolored while being displayed in a classroom, for example.
In order to improve this fading, an organic pigment with strong light resistance such as perylene-condensed azo orange is used as the colored organic pigment to be used, or a light-resistant organic pigment such as cadmium yellow is used instead of the colored organic pigment. They used strong inorganic pigments.

[0003]

However, since solid drawing materials such as crayon pass are often used by children and children, the required characteristics are not only light resistance but also low cost. In some cases, it may be highly safe, such as with low toxicity. From this point of view, the organic pigment having strong light resistance such as the perylene-based condensed azo orange has a problem that the manufacturing cost is high and it cannot be supplied to the market at a low price, while the heavy metal such as cadmium yellow is used. The contained inorganic pigment has a problem that it is inferior in safety because it is highly toxic. In view of this problem, an object of the present invention is to provide a solid drawing material that uses an organic pigment that is low in cost and highly safe and that has a coating film with good light resistance.

[0004]

DISCLOSURE OF THE INVENTION The gist of the present invention is a solid drawing material containing at least a colored organic pigment, titanium oxide, a wax, and a piperidine derivative and / or a benzotriazole derivative.

The present invention will be described in detail below. The colored organic pigment is used as a colorant. Specifically, C.I. I. Pigment Orange 16 (naphthol orange pigment), C.I. I. Pigment Red 5 (naphthol red pigment), C.I. I. Pigment Red 48-3 (Watching Red Strontium salt), C.I. I. Pigment Blue 68 (phthalocyanine blue pigment), C.I.
I. Higment green (phthalocyanine green pigment)
And the like that have been conventionally used. The amount used is preferably 2 to 7% by weight based on the total amount of the solid drawing material.

Titanium oxide is used in combination with the above-mentioned colored organic pigment in order to improve the hiding power and to obtain a light intermediate color (pastel color). Titanium oxide is a rutile type,
Various types such as anatase type can be used, and specifically, Thaitone SR-1, R-650, R-3L, R-31.
0, same A-110, same A-150, same R-5N (above,
Sakai Chemical Industry Co., Ltd.), Taipaque R-580, and R-
550, R-930, A-100, A-220
(Above, Ishihara Sangyo Co., Ltd.), Kronos KR-310,
KR-380, KR-480, KA-10, K
A-20, KA-30 (above, manufactured by Titanium Industry Co., Ltd.)
Etc., but the anatase type is preferably used from the viewpoint of cost. The amount used is preferably 100 to 300 parts by weight with respect to 100 parts by weight of the colored organic pigment.

The wax includes straight chain and side chain paraffin wax, hydrogenated hydrogenated oil, saturated fatty acid and its derivatives, polyethylene wax, carnauba wax, beeswax,
Wood wax, natural wax such as montan wax, and synthetic wax can be used, and may be used alone or in combination of two or more kinds. The amount used is preferably 5 to 80% by weight based on the total amount of the solid drawing material.

The piperidine derivative and / or the benzotriazole derivative is used for improving the light resistance of the coating film of the solid drawing material. As the piperidine derivative,
Dimethyl succinate-1- (2-hydroxyethyl) -4
-Hydroxy-2,2,6,6-tetramethylpiperidine polycondensate, poly [{6- (1,1,3,3-tetramethylbutyl) imino-1,3,5-triazine-2,4
-Diyl} {(2,2,6,6-tetramethyl-4-piperidyl) imino} hexamethylene {(2,2,6,6
-Tetramethyl-4-piperidyl) imino)}], 2-
(3,5-di-t-butyl-4-hydroxybenzyl)
-2-n-butylmalonate bis (1,2,2,6,6-
And pentamethyl-4-piperidyl). As the benzotriazole derivative, 2- (3,
5-di-t-butyl-2-hydroxyphenyl) benzotriazole, 2- (5-methyl-2-hydroxyphenyl) benzotriazole, 2- (3-t-butyl-5)
-Methyl-2-hydroxyphenyl) -5-chlorobenzotriazole. These substances may be used alone or in combination of two or more.
The amount used is preferably 0.2 to 2.0 parts by weight with respect to the total amount of the solid drawing material.

In addition to the above components, if necessary, an extender or filler, which is a conventionally known extender pigment such as calcium carbonate, talc, clay, silica or barium sulfate, may be added to the solid drawing material in an amount of 5 to 5. It is also possible to use 25% by weight, a resin such as polyethylene, polypropylene, or polyvinyl chloride in an amount of 3 to 15% by weight based on the total amount of the solid drawing material, or a pigment dispersant.

Further, in the solid drawing material of the present invention, the above-mentioned components are mixed by heating and stirring, and if necessary, they are kneaded by a kneader such as a kneader or a roll mill. It can be obtained by pouring, injecting, press-fitting or extruding, and cooling and solidifying.

[0011]

FUNCTION The piperidine derivative and / or the benzotriazole derivative has a property of absorbing ultraviolet rays. Therefore, it is presumed that the influence of ultraviolet rays, which is one of the major causes of discoloration of colored organic pigments, is reduced.

[0012]

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

[0013]Example 1  Titanium oxide 60 parts C.I. I. Pigment Orange 16 (naphthol orange pigment) 25 parts Liquid paraffin 65 parts 130 ° F Paraffin 10 parts Stearic acid 60 parts Light calcium carbonate 150 parts Poly [{6- (1,1,3,3-tetramethylbutyl) imino- 1,3,5-triazine-2,4-diyl} {(2,2,6,6-tetramethyl-4-piperidyl) imino} hexamethylene {(2,2,6,6-tetramethyl-4 -Piperidyl) imino)}] 2.5 parts The above ingredients were heated and mixed in a Henschel mixer and melted.
Then, cool, pelletize, and mold with a molding machine
Then, an orange solid drawing material was obtained. Got

[0014]Example 2  Titanium oxide 60 parts C.I. I. Pigment Blue 68 (phthalocyanine blue pigment) 25 parts Liquid paraffin 65 parts 130 ° F paraffin 10 parts Stearic acid 60 parts Light calcium carbonate 150 parts 2- (3,5-di-t-butyl-4-hydroxybenzyl)- 2-n-butyl bis (1,2,2,6,6-pentamethyl-4-piperidyl) malonate 3 parts The above ingredients were heated and mixed in a Henschel mixer and melted.
Then, cool, pelletize, and mold with a molding machine
Then, a blue solid drawing material was obtained.

[0015]Example 3  Titanium oxide 60 parts C.I. I. Pigment Red 5 (naphthol red pigment) 10 parts Liquid paraffin 60 parts 130 ° F Paraffin 70 parts Stearic acid 100 parts Talc 30 parts 2- (5-Methyl-2-hydroxyphenyl) benzotriazole 4 parts The above ingredients are Henschel mixers. -Mixed by heating and melted
Then, cool, pelletize, and mold with a molding machine
Then, a red solid drawing material was obtained.

[0016]Comparative Example 1  In Example 1, poly [{6- (1,1,3,3-
Tramethylbutyl) imino-1,3,5-triazine-
2,4-diyl} {(2,2,6,6-tetramethyl-
4-piperidyl) imino} hexamethylene {(2,2,
6,6-Tetramethyl-4-piperidyl) imino)}]
The same procedure as in Example 1 was performed except that the
I got the painting materials.

[0017]Comparative example 2  In Example 2, 2- (3,5-di-t-butyl-4
-Hydroxybenzyl) -2-n-butylmalonic acid bis
(1,2,2,6,6-pentamethyl-4-piperidi
Except that the blue solid was removed in the same manner as in Example 2 except that
A drawing material was obtained.

[0018]Comparative Example 3  In Example 3, 2- (5-methyl-2-hydroxy)
Examples except that (phenyl) benzotriazole was omitted.
In the same manner as in 3, a red solid drawing material was obtained.

[0019]

[Effect] A fading test was conducted on the above Examples 1 to 3 and Comparative Examples 1 to 3. The results are shown in Table 1.

[0020]

[Table 1]

Discoloration test: The solid drawing materials obtained in Examples and Comparative Examples were subjected to JIS P38 at a writing pressure of 1.0 ± 0.3 Kg.
After applying once vertically and horizontally to the filter paper specified in 01, 1 with a carbon arc lamp type fade tester (manufactured by Shimadzu Corporation)
Irradiation was carried out for 30 hours at 30 to 140 volts, 15 to 17 amps, and a black panel temperature of 37 ± 5 ° C. The chromaticity before and after irradiation was measured with a color computer Model SM-4 (manufactured by Suga Test Instruments Co., Ltd.), and the color difference ΔE was calculated (unit: NBS). The larger value indicates the fading.

As described in detail above, the solid drawing material according to the present invention uses a pigment which is conventionally used as a colored organic pigment and has good cost and safety, but weak light resistance. However, the painted traces show good light resistance.

Claims (1)

[Claims] 1. A solid drawing material containing at least a colored organic pigment, titanium oxide, a wax, and a piperidine derivative and / or a benzotriazole derivative.