JP2001152071A - Solid drawing material with erasability - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a solid drawing material capable of erasing characters written therewith. SOLUTION: This solid drawing material is characterized by essentially comprising titanium oxide, an extender pigment of aspherical particles each 0.3-30 μm in size, a forming material and a lubricant; wherein the weight ratio of the titanium oxide to extender pigment is 1:(1-8).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a solid drawing material,
More specifically, the present invention relates to a solid drawing material in which handwriting written on a non-absorbing surface such as a white board, a color board, a glass, an enamel board, and a plastic board can be erased with paper, cloth, a white board eraser, or the like.

[0002]

2. Description of the Related Art Conventionally, white boards, color boards,
A whiteboard marker is known as a writing instrument which can be written on a non-absorbing surface such as a glass, an enamel plate, or a plastic plate and can be erased with paper, cloth, eraser or the like. This whiteboard marker is made of pigment, resin, release material,
This is a pen-type writing instrument that contains at least an ink composed of a solvent. It is known that this type of writing implement uses a low-boiling organic solvent as a solvent for the ink, so that if the cap is left open, the solvent in the ink evaporates and cannot be used. As an erasable writing instrument of the type not using an ink as described above, a solid writing instrument comprising at least a body material, a wax-like substance, a lubricant and a pigment contains 1% by weight to 60% by weight of spherical particles having an average particle diameter of 200 μm or less. Japanese Patent Application Laid-Open No. 4-279684 has been proposed which has a gist of a solid writing implement to be contained below. Incidentally, many solid writing instruments have been proposed which are not intended to be erased as well as those which can be erased as described above. For example, Japanese Patent Application Laid-Open No. 10-168378 discloses a solid drawing material having a solid drawing material composition containing at least a wax, an extender pigment, a coloring pigment, an organic silicone resin, a volatile silicone oil, and silica. The present invention has an object to solve the problem that the hand is stained by the stickiness of the paint film drawn by the solid drawing material, the work is damaged by foreign matters such as dust, and that it is difficult to perform multicolor printing. It was done.

[0003]

The handwriting erasing property is low. The solid drawing material described in Japanese Patent Application Laid-Open No. Hei 4-279684 needs to be strongly rubbed many times when trying to erase it with an eraser. An object of the present invention is to provide a solid drawing material that can be easily erased.

[0004]

SUMMARY OF THE INVENTION The present invention provides a titanium oxide, an extender and a non-spherical extender having a particle size of 0.3 to 30 .mu.m. And titanium oxide: extender pigment = 1: 1
８8 (weight).

Hereinafter, each component of the present invention will be described in detail. Titanium oxide is used as a coloring material. Various titanium oxides such as rutile type and anatase type can be used as the titanium oxide. Commercially available products include Tighton SR-
1, R-650, R-3L, R-310, A-
110, A-150, R-5N (all manufactured by Sakai Chemical Industry Co., Ltd.), TYPE R-550, R-580, R-930, A-100, A-220 ( As described above, manufactured by Ishihara Sangyo Co., Ltd.), Kronos KR-310, KR-38
0, KR-480, KA-10, KA-20, KA-30 (all manufactured by Titanium Industry Co., Ltd.), Bayer R
-FD-1, R-FD-2, R-FB-1, R-
FB-3, R-KB-3, R-CK-20 (the above,
Bayer AG, Germany), Taipaek R-630, R-615, R-830 (Ishihara Sangyo Co., Ltd.)
And R-901 and T-Pure R-901 (both manufactured by DuPont Japan Limited). These titanium oxides can be used alone or as a mixture of two or more kinds, and the amount of use is preferably 1 to 50% by weight based on the total amount of the solid drawing material.

[0006] The extender is mainly composed of a colorant filler or
It is used as a pigment to be blended according to the purpose of the quality of the product. In the present invention, the solid drawing material is used to impart erasability. In order to achieve this purpose, it is necessary to use a non-spherical material having a particle size of 0.3 to 30 μm. Furthermore, the amount of use requires a compounding amount of 1 to 8 times by weight with respect to titanium oxide. If the particle size is less than 0.3 μm, the pigment will enter the unevenness of the board surface at the time of erasure, making it impossible to completely erase the handwriting on the board. If it exceeds 30 μm, write on the board. You will not be able to read the characters. Also,
The ratio of the extender pigment is 8 in the mixing ratio of the titanium oxide and the extender pigment.
If it is larger than 1, the characters cannot be read, and if it is smaller than 1, the written characters cannot be erased. The particle size is a value indicated by a weight average diameter. The weight average diameter is represented by the ratio of the total volume occupied by particles having a diameter d, and is a value obtained by the following equation.

[0007]

(Equation 1)

Hereinafter, specific examples of the extender will be described. As the extender pigment, heavy calcium carbonate, light calcium carbonate, talc or the like is used. Heavy calcium carbonate is calcium carbonate obtained by physically pulverizing raw materials such as crude limestone in a dry or wet manner, and is made of R-carbon (particle size: 2
0 μm crushed), heavy carbon N-35 (particle size: 17 μm crushed), heavy calcium carbonate (particle size: 12 μm crushed), Super S (particle size: 6.3 m crushed), special rice S (particles) Diameter: 5.5 μm crushed, Super SS (particle size: 4.5 μm crushed) Super SSS (particle size: 3.4 μm crushed), Super 4S (particle size: 2.
7 μm crushed), Super # 1500 (particle size: 2.2)
μm crushed), Super # 1700 (particle size: 1.9μ)
m crushed), Super # 2000 (particle size: 1.7 μm)
(Crushed), Super # 2300 (particle size: 1.4 μm)
Nanox # 25 (particle size: 1.3 μm crushed), Nanox # 30 (particle size: 1.1 μm crushed)
(Made by Maruo Calcium Co., Ltd.), Whiten P-1
0 (particle size: 2.0 μm crushed), P-30 (particle size:
4.3 μm crushed), P-50 (particle size: 11.0 μm)
m crushed), P-70 (particle size: 27 μm crushed)
Whiteon B (particle size: 3.6 μm crushed), SSB (particle size: 1.5 μm, manufactured by Toyo Fine Chemical)
m crushed), SB blue (particle size: 2.2 μm crushed)
(Both manufactured by Shiraishi Industry Co., Ltd.) and the like. Light calcium carbonate is calcium carbonate obtained by chemically reacting raw materials such as dense limestone, and includes whisker, light calcium carbonate (all manufactured by Maruo Calcium Co., Ltd.), Br
illiant-15 (particle size: 0.55 μm spindle shape), Unifant-S15 (particle size: 0.55 μm)
Spindle type), PC-700 (particle size: 3.5 μm spindle shape)
(Both manufactured by Shiraishi Industry Co., Ltd.) and the like. Talc is a white powder of hydrous magnesium silicate obtained by finely pulverizing an ore called talc, ND (particle size: 5.5 μm crushed), SWA (particle size: 5.5 μm crushed), SSS (particle size: 5 0.5 μm crushed), SS (particle size: 5.5 μm)
(Crushed) (all manufactured by Nippon Talc Co., Ltd.), Kuniminetarc GTA (particle size: 5.5 μm crushed), and TA (particle size:
5.5 μm crushed, imported talc CTA (particle size: 5.
5 μm crushed) (all manufactured by Kunimine Industry Co., Ltd.).

The forming agent has a function of shaping the shape of the solid drawing material, and generally, wax, gelling agent, clay mineral and the like can be used. Specific examples are as follows. Wax, beeswax,
Animal waxes such as whale wax, insect wax, etc., plant waxes such as candelilla wax, carnauba wax, wood wax, mineral waxes such as montan wax, ozokerite, petroleum waxes such as paraffin wax, microcrystalline wax, etc. And synthetic waxes such as Fischer-Tropsch wax, low molecular weight polyethylene and derivatives thereof, cetyl alcohol, stearic acid, polyethylene glycol cetearate, caster wax and diheptadecyl ketone. Gelling agents include N-acyl-L-glutamic acid-α, β-di-n-butylamide, dibenzylidene-D
-Sorbitol and the like. Examples of the clay mineral include bentonite, smectite, montmorillonite, beederite, non-trite, hectorite, saponite and the like. These forming agents can be used alone or in combination of two or more depending on the purpose.

The lubricating material has a function for reducing the writing feeling when writing characters. Generally, a high boiling point solvent, oil, or the like can be used. Specific examples include liquid paraffin, polyethylene glycol, machine oil, spindle oil and the like. These lubricants can be used alone or in combination of two or more depending on the purpose.

In addition to the above components, if necessary, an anionic or nonionic surfactant solubilized in water, a dispersant such as a fatty acid ester of polyethylene glycol, and the like.
An organic pigment for toning can be appropriately selected and used.

In the method for producing a solid drawing material of the present invention, the above components are mixed in required amounts, mixed and dispersed by a conventionally known dispersing machine, dispersed, put in a mold, and cooled to form a solid. Take it out and get it easily. Also, it can be easily obtained by pouring into a rod-shaped container that can be fed out and cooling and solidifying.

[0013]

The solid drawing material of the present invention has a particle size of 0.3 to 30 .mu.m.
m, the non-spherical extender is blended with titanium oxide at a compounding ratio of 1: 1 to 8, so that the pigment that has entered the irregularities on the board surface is extruded by the corners (edges) of the extender. In addition, it seems that the action of rolling the pigment in the entire extender pigment works, and it can be more easily erased than the conventional solid drawing material.

[0014]

The present invention will be described below in further detail with reference to examples. Example 1 JR701 (rutile type titanium oxide, manufactured by Teica Co., Ltd.) 30.0 parts by weight Super # 2000 (heavy calcium carbonate, particle size 1.7 μm, crushed, manufactured by Maruo Calcium Co., Ltd.) 40.0 Parts by weight Neowax E-20 (polyethylene oxide WAX, manufactured by Yasuhara Chemical Co., Ltd.) 20.0 parts by weight Liquid paraffin 10.0 parts by weight The above components are heat-melted and dispersed by a roll mill to obtain a solid drawing material. Obtained.

Example 2 JR701 (rutile-type titanium oxide, manufactured by Teica Co., Ltd.) 20.0 parts by weight PC (light calcium carbonate, particle size 3.2 μm, spindle-shaped, manufactured by Shiraishi Kogyo Co., Ltd.) 50.0 parts by weight JAPAN WAX (Kirou, manufactured by Toa Kasei Co., Ltd.) 15.0 parts by weight Liquid paraffin 15.0 parts by weight Each of the above components was made in the same manner as in Example 1 to obtain a solid drawing material.

Example 3 JR701 (rutile type titanium oxide, manufactured by Teica Co., Ltd.) 25.0 parts by weight ND talc (talc, particle size: 5.5 μm, crushed form, manufactured by Nippon Talc Co., Ltd.) 45.0 parts by weight 130 Degree of paraffin wax (paraffin wax, manufactured by Taniguchi Petroleum Refining Co., Ltd.) 10.0 parts by weight Polyethylene glycol 25.0 parts by weight The above components were made in the same manner as in Example 1 to obtain a solid drawing material.

Example 4 Kronos Titanium KR380N (rutile type titanium oxide, manufactured by Titanium Industry Co., Ltd.) 35.0 parts by weight Super 4S (heavy calcium carbonate, particle size 2.7 μm, crushed form, manufactured by Maruo Calcium Co., Ltd.) 35.0 parts by weight Kao wax T-1 (distearyl ketone, manufactured by Kao Corporation) 10.0 parts by weight Polyethylene glycol 20.0 parts by weight The above components were made in the same manner as in Example 1 to obtain a solid drawing material. Was.

Example 5 JR701 (rutile type titanium oxide, manufactured by Teica Co., Ltd.) 25.0 parts by weight PC-700 (light calcium carbonate particle size: 3.5 μm spindle-shaped Shiraishi Kogyo Co., Ltd.) 35.0 parts by weight Part JAPAN WAX (Kirou, manufactured by Toa Kasei Co., Ltd.) 30.0 parts by weight Liquid paraffin 10.0 parts by weight Each of the above components was made in the same manner as in Example 1 to obtain a solid drawing material.

Example 6 Kronos KR-380N (rutile type titanium oxide, manufactured by Titanium Industry Co., Ltd.) 40.0 parts by weight R heavy carbon (heavy calcium carbonate, particle size 20 μm, crushed form manufactured by Maruo Calcium Co., Ltd.) 40.0 parts by weight JAPAN WAX (Kirou, manufactured by Toa Kasei Co., Ltd.) 15.0 parts by weight Polyethylene glycol 5.0 parts by weight Each of the above components was made in the same manner as in Example 1 to obtain a solid drawing material.

Example 7 Kronos KR-380N (rutile type titanium oxide, manufactured by Titanium Industry Co., Ltd.) 30.0 parts by weight Special Rice S (heavy calcium carbonate, particle size: 5.5 μm, crushed form, manufactured by Maruo Calcium Co., Ltd.) 40.0 parts by weight 130-degree paraffin wax (paraffin wax manufactured by Taniguchi Oil Refining Co., Ltd.) 10.0 parts by weight Liquid paraffin 20.0 parts by weight The above components were made in the same manner as in Example 1 to obtain a solid drawing material. Was.

Example 8 R900 (rutile type titanium oxide, manufactured by Dupont Japan Limited) 10.0 parts by weight Bliant-1500 (light calcium carbonate, particle size 0.55 μm, spindle-shaped Shiraishi Kogyo Co., Ltd.) 60.0 Parts by weight Neowax E-20 (polyethylene oxide WAX, manufactured by Yasuhara Chemical Co., Ltd.) 18.0 parts by weight Spindle oil 10.0 parts by weight GP-1 (gelling agent manufactured by Ajinomoto Co., Ltd.) 1.0 part by weight Each component was melted by heating, poured into a rod-shaped container that can be fed out, and then cooled and solidified to obtain a solid drawing material.

Example 9 R900 (rutile titanium oxide, manufactured by DuPont Japan Limited) 23.0 parts by weight PC-700 (light calcium carbonate, particle size 3.5 μm, spindle-shaped Shiraishi Kogyo Co., Ltd.) 45.0 Parts by weight Neowax E-20 (polyethylene oxide WAX, manufactured by Yasuhara Chemical Co., Ltd.) 18.0 parts by weight Spindle oil oil 13.0 parts by weight Oil gelling agent GP-1 (gelling agent manufactured by Ajinomoto Co., Inc.) 1 0.0 parts by weight The above components were made in the same manner as in Example 9 to obtain a solid drawing material.

Example 10 R900 (rutile type titanium oxide, manufactured by Dupont Japan Limited) 20.0 parts by weight Whiten SS (talc, particle size 5.5 μm, crushed form manufactured by Kunimine Industries Co., Ltd.) 40.0 parts by weight Tone bentonite (bentonite, manufactured by Kanto Bentonite Mining Co., Ltd.) 20.0 parts by weight Liquid paraffin 1.0 parts by weight Water 19.0 parts by weight The above components are subjected to dispersion treatment by a roll mill, and after treatment, dipped in liquid paraffin and dried. Then, a solid drawing material was obtained.

Example 11 Kronos KR380N (rutile titanium oxide, manufactured by Titanium Industry Co., Ltd.) 30.0 parts by weight Kunimine GTA (talc, particle size: 5.5 μm, crushed Kunimine Industry Co., Ltd.) 30.0 parts by weight Part Wenger (bentonite, manufactured by Toyoko Yoko Co., Ltd.) 20.0 parts by weight Liquid paraffin 1.0 part by weight Water 19.0 parts by weight The above components were made in the same manner as in Example 10 to obtain a solid drawing material.

Example 12 Kronos KR380N (rutile type titanium oxide, manufactured by Titanium Industry Co., Ltd.) 15.0 parts by weight Kunimine TA (talc, particle size: 8.3 μm, crushed form manufactured by Kunimine Industry Co., Ltd.) 45.0 parts by weight Part Kunigel VA (bentonite, manufactured by Kunimine Industry Co., Ltd.) 20.0 parts by weight Water 20.0 parts by weight The above components were made in the same manner as in Example 10 to obtain a solid drawing material.

Comparative Example 1 A solid drawing material was obtained in the same manner as in Example 1 except that acrylic resin particles (particle size: 40 μm) were used instead of Super # 2000.

Comparative Example 2 Example 2 was repeated except that the blending amount of titanium oxide and extender pigment was changed from 20 parts by weight of titanium oxide and 50 parts by weight of extender to 50 parts by weight of titanium oxide and 20 parts by weight of extender. A solid drawing material was obtained in the same manner as described above.

Comparative Example 3 In Example 9, MCS-5 (light calcium carbonate, particle diameter 0.1 μm cubic) was used instead of Bliant-1500 (light calcium carbonate, particle diameter 0.55 μm, spindle-shaped Shiraishi Kogyo Co., Ltd.). Maruo Calcium Co., Ltd.
Except for the use of a solid drawing material.

Comparative Example 4 In Example 10, 20.0 parts by weight to 6.0 parts by weight of titanium oxide and 40.0 parts by weight of an extender were added to 5 parts by weight.
A solid drawing material was obtained in the same manner as in Example 10, except that the amount was changed to 4.0 parts by weight.

Comparative Example 5 A solid drawing material was obtained in the same manner as in Example 12, except that all the extender pigments were replaced with titanium oxide.

The solid drawing materials obtained in Examples 1 to 12 and Comparative Examples 1 to 5 were tested for the number of handwriting erasures, the presence or absence of stains after erasure, and the legibility of characters. Table 1 shows the results.

Handwriting erasure test: The number of times (upper limit: 10) is measured until the handwriting is reciprocated left and right with a commercially available tissue paper having a weight of 1 kg on the handwriting.

Soil confirmation test after erasure; weight 1 kg on handwriting
Left and right with a commercially available tissue paper with a weight
After reciprocating 0 times, the degree of erasure is visually checked.

Character reading test: Five characters are written on the surface to be written by handwriting, and whether the written character is readable is visually checked.

[0035]

[Table 1]

[0036]

As described above, the solid drawing material of the present invention is a solid drawing material capable of erasing handwriting, making conspicuous stains after erasure, and making written characters easy to read.

Claims (1)

[Claims] 1. A titanium oxide having a particle size of 0.3 to 30 μm.
And at least a non-spherical extender, a forming material, and a lubricant, wherein the mixing ratio of titanium oxide and the extender is titanium oxide: exterior pigment = 1: 1 to 8 (weight). Erasable solid drawing material.