JPH0433970A - Solid painting material - Google Patents

Abstract

PURPOSE:To obtain a solid painting material containing pigment, wax and sorbitan tristearate, reduced in occurrence of coating waste in painting and having high concentration after painting. CONSTITUTION:The aimed painting material containing a pigment (e.g. carbon black, titanium oxide or phthalocyanin blue), preferably of 3-30wt.%, wax (e.g. polyethylene wax or carnauba wax), preferably of 5-80wt.% and sorbitan tristearate, preferably of 10-30wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a solid drawing material, and more particularly, to a solid drawing material that generates less paint scum during painting and has a high concentration of coating marks. It is something.

(Prior Art) So-called solid drawing materials such as crayons and passes, which are composed of pigments, waxes, fillers, liquid oils, etc., have been used mainly for drawing pictures by kindergarteners and children. Although it peels off from the solid drawing material when drawing,
Areas that do not adhere to the surface of paper such as drawing paper (so-called paint scum)
This had the disadvantage that it often caused stains on hands and clothes, and also stained the completed painting. Therefore, in order to prevent the formation of coating scum, methods have been proposed in which waxes, which are one of the components of the solid drawing material, have a high melting point.

(Problem to be solved by the invention) However, in the method using the above-mentioned high melting point wax,
The hardness of the solid drawing material increases, the amount of peeling of the solid drawing material when drawing is small, and the density decreases.
Other problems occurred, and it was not possible to prevent the occurrence of paint scum during painting without reducing the density of the coating trace.

Therefore, the present inventor completed the present invention with the aim of preventing the generation of paint scum during painting without reducing the density of the paint mark.

(Means for Solving the Problems) The gist of the present invention is a solid drawing material comprising at least a pigment and a wax, which is characterized by containing sorbitan tristearate.

The present invention will be explained in detail below.

Pigments are used as coloring agents, and can be used regardless of whether they are inorganic or organic, such as conventionally known carbon black, titanium oxide, zinc oxide, phthalocyanine blue, phthalocyanine green, waratin bread, Karmitsu 6B, and Hansa yellow. However, they may be used alone or in combination of two or more, and the amount used varies greatly depending on the type of pigment.

Considering color development, drawing properties, etc., the amount is preferably 3 to 30% by weight based on the total amount of the solid drawing material.

Waxes may be those conventionally used in solid drawing materials, such as linear and side chain paraffin wax, hydrogenated hydrogenated oil, saturated fatty acids and their derivatives, polyethylene wax, carnauba wax, beeswax, wood wax, montan wax, etc. For example, natural wax or synthetic wax can be used without any particular limitation, and the amount used is 5% of the total amount of solid drawing material.
~80% by weight is preferred.

Sorbitan acid tristearate, which is the gist of the present invention, is
It is used to prevent the generation of paint scum during painting without reducing the density of the coating trace, and the amount used is 7 to 60% by weight, preferably 10 to 60% by weight based on the total amount of the solid drawing material. It is 30% by weight.

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

The solid drawing material of the present invention is prepared by heating and stirring the above-mentioned components,
Further, if necessary, it can be obtained by kneading with a mixer such as a kneader or a roll mill, pouring the molten state into a mold, or injecting, press-fitting or extruding, and cooling and solidifying.

(Function) The reason why the solid drawing material of the present invention maintains the density of the application trace and generates less paint scum during painting is because the wax has glabella peeling properties due to the plasticization of sorbitan tristearate. It is surmised that this was done in order to become That is, when painting with this solid drawing material, the solid drawing material peels off in layers,
Because it is fixed on the paper surface, there is less paint scum and the density of the paint marks is high.

(Example) Hereinafter, the present invention will be explained in more detail with reference to Examples. In the Examples and Comparative Examples, "parts" indicate "parts by weight."

Large 1M carbon black (black pigment) 10 parts PE
W-2 50 parts (polyethylene wax, made by Chusei Wax Polymer ■) Sorbitan acid tristearate 40 parts The above ingredients were heated and mixed in a Henschel mixer, melted, cooled, and pelletized, which was then transferred to a molding machine. A black solid drawing material was obtained.

Phthalocyanine blue (blue pigment) 10 parts 130
'F Paraffin Wax 35 parts (paraffin wax, made by Nippon Seirin) Carnauba wax
25 parts (tel! Nodawa Noda wax tristearate bitanate 30 parts The above ingredients were heated and mixed in a Henschel mixer.

After melting, it was cooled and pelletized, which was molded using a molding machine to obtain a blue solid drawing material.

Lost number 1 Karmitsu 6B (red pigment) 15 parts 130″
F paraffin 25 parts sorbitan tristearate 20 parts talc
20 parts of the above components were heated and mixed in a Henschel mixer, melted, cooled, and pelletized, which was molded in a molding machine to obtain a red solid drawing material.

Solid drawing materials were obtained in the same manner as in Examples 1 to 3 except that sorbitan tristearate was omitted.

(Effects of the Invention) The solid drawing materials obtained in Examples 1 to 3 and Comparative Examples 1 to 3 were tested for the density of painted marks and the occurrence of painted scum.

The results are shown in Table 1.

Table 1 Painted surface density test: Sharpen the tip of the solid drawing material obtained on each side with a commercially available pencil sharpener.
Record-type drawing machine with a writing angle of 75° and a writing pressure of 300g (
Made by Seiki Kogyo Kenkyujo ■, ModeIPs-5), 40
It was written under the conditions of Orpm.

1) Density measurement: The Y value (brightness, %) of the drawn trace was measured using a color computer Model SM-4 (manufactured by Suga Test Instruments).

(The smaller the Y value, the higher the concentration.) Paint scum generation test: The solid drawing materials obtained in Examples 1 to 3 and Comparative Examples 1 to 3 were
Apply pressure 1.0+ within each 10an square frame of drawing paper.
The weight of the coating residue generated when 0.2 kg was coated once in the vertical and horizontal directions was measured.

As explained in detail above, the solid drawing material according to the present invention is excellent in that it significantly reduces the occurrence of coating scum while maintaining the high density of the coating trace.

Patent applicant: Pentel Co., Ltd.

Claims (1)

[Claims] A solid drawing material comprising at least a pigment and a wax, characterized in that it contains sorbitan tristearate.