JP5700664B2 - Solid cursive - Google Patents

Description

  The present invention relates to a solid cursive body. Specifically, the present invention relates to a solid cursive body that can be written on a smooth surface and can erase written handwriting.

  Conventionally, the handwriting such as letters written on a writing surface (hereinafter referred to as a writing board) having a smooth surface such as white board, color board, glass, enamel board, plastic board, etc. is wiped with paper, cloth, eraser, etc. Solid cursives that can be erased have been studied (see, for example, Patent Documents 1 to 4). The solid cursive body includes a solidifying agent for integrating and solidifying various components including a colorant, and peeling to enable erasure of handwriting written on a writing board. An agent is blended. Conventionally, gelling agents such as waxes, fatty acid alkali metal salts and sorbitol derivatives have been used as such solidifying agents, and higher fatty acid esters and mineral oils have been used as release agents. ing.

  Furthermore, in order to improve erasability, solid cursives using 12-hydroxystearic acid as a solidifying agent and a water-soluble solvent that is hardly volatile at room temperature such as glycerin or propylene glycol as a release agent are also known. (For example, see Patent Document 5).

  However, since the solid cursive can erase the handwriting with water, the handwriting does not have water resistance. In addition, it can be erased with water, but it can be used outdoors in rainy weather or around water, such as when the writing board is wet, i.e. when writing on a wet surface. There was a problem that the solid cursive body slipped and it was difficult to write, or the handwriting flowed immediately after writing, making it difficult to see.

JP 59-176369 A JP-A 63-199775 Japanese Patent Laid-Open No. 09-143418 JP 2001-240789 A JP 2005-213356 A

  The present invention provides a solid writing material that is excellent in writability and erasability even when the writing board is wet with water, and the handwriting written on the writing board has water resistance.

In the present invention, the above-mentioned problems have been solved and the present invention has been completed by using a solid writing material comprising at least polyoxypropylene polyglyceryl ether, a higher alcohol and a colorant.
That is, the present invention
"1. A solid cursive characterized by comprising at least a polyoxyalkylene polyglyceryl ether, a higher alcohol, and a colorant."

  According to the present invention, by using polyoxypropylene polyglyceryl ether and a higher alcohol in combination, the heat resistance is good even when the solid writing material is heated, and when writing is performed in a state where the writing board is wet with water. Even when the writing board is wet with water, it can be easily erased with cloth or paper when the handwriting is water-resistant. It is possible to achieve excellent effects such as being possible.

  The solid cursive of the present invention comprises polyoxypropylene polyglyceryl ether, a higher alcohol, and a colorant as minimum units. With this configuration, writing and erasing can be performed even when the writing board is wet with water, and the handwriting can have water resistance.

  The polyoxyalkylene polyglyceryl ether used in the solid cursive of the present invention is a hardly volatile oil agent having both liquid hydrophilicity and lipophilicity at room temperature. Specific examples include polyoxyethylene polyglyceryl ether and polyoxypropylene polyglyceryl ether, and one or more of them can be used. Polyoxypropylene polyglyceryl ether is preferably used, and those having 14 to 24 polyoxypropylene units in one molecule of polyoxypropylene polyglyceryl ether are particularly preferred. If the polyoxypropylene unit is smaller than this range, the hydrophilicity becomes stronger and the water resistance of the handwriting tends to be inferior. If it is larger than this range, the lipophilicity becomes higher and the handwriting erasability tends to be worsened. . Within the above range, hydrophilicity and lipophilicity are well balanced, writing and erasing are possible even when the writing board is used in a wet state, and water resistance of the handwriting is also particularly preferred. Furthermore, since it is liquid at normal temperature, it exists in a liquid state in the solid cursive body, so that it can work as a lubricant, and the solid cursive body is considered to have a smoother writing taste.

  The blending ratio of the polyoxyalkylene polyglyceryl ether used in the solid cursive of the present invention is preferably 10 to 40% by mass with respect to the total mass of the solid cursive. If it is smaller than this range, the water resistance of the handwriting tends to be inferior. If it is larger than this range, the strength of the solid cursive tends to be inferior. As a particularly preferable blending ratio, it is 20 to 35% by mass with respect to the total mass of the solid cursive body, and when it is within this range, the writing board can be satisfactorily written and erased even when it is wet, and the strength of the solid cursive body And the water resistance of the handwriting can be sufficiently obtained.

  The higher alcohol used in the present invention is a saturated aliphatic alcohol that is solid at room temperature. Specific examples include alcohols having an alkyl group having 12 or more carbon atoms, and one or more of them can be used. Preferably used are primary alcohols having 18 to 24 carbon atoms, and more specifically, stearyl alcohol, aralkyl alcohol, behenyl alcohol, lignoceryl alcohol and the like. When the carbon number is smaller than the above range, the melting point of the higher alcohol is lowered, and the heat resistance of the solid cursive character tends to be inferior, and when it is larger than this range, the writing character of the solid cursive character becomes hard and the writing performance tends to be inferior. It can be seen.

  When it exists in the said range, since the heat resistance of a solid cursive body and writing performance become favorable, it is especially preferable.

  As a compounding ratio of the higher alcohol used for this invention, 10-50 mass% is preferable with respect to solid cursive total mass. If it is smaller than this range, the heat resistance of the solid writing material tends to be inferior, and the handwriting erasability tends to be inferior. If it is larger than this range, the water resistance of the handwriting tends to be inferior. As a particularly preferred blending ratio, it is 10 to 40% by mass with respect to the total mass of the solid cursive body, and if it is within this range, the handwriting can be erased well, and the water resistance of the handwriting and the heat resistance of the solid cursive body are sufficient. Since it is obtained, it is preferable.

In the solid writing material of the present invention, polyoxyalkylene polyglyceryl ether and higher alcohol are used, and the mass ratio is preferably 1: 0.5 to 1: 2. When the mass ratio of the higher alcohol is smaller than this range, the heat resistance and strength of the solid writing material tend to be inferior, and when it is larger than this range, the water resistance of the handwriting tends to be deteriorated. Within this range, the writing board can be satisfactorily written and erased even when the writing board is wet, and the handwriting has water resistance.

  As the colorant used in the present invention, any of conventionally known pigments and dyes can be used. Examples thereof include inorganic pigments, organic pigments, white pigments, pearl pigments, metal pigments, fluorescent pigments, and the like. Use in combination. Specific examples of the inorganic pigment include carbon black, iron black, ultramarine blue, and petal, and examples of the organic pigment include azo pigments, indigo pigments, phthalocyanine pigments, quinacridone pigments, and thioindigo pigments. Examples of white pigments include titanium oxide, zinc oxide, zinc white, and examples of fluorescent pigments include daylight fluorescent pigments and phosphorescent pigments. As the dye, an oil-soluble dye is preferably used. Specific examples include phthalocyanine dyes, pyrazolone dyes, nigrosine dyes, anthraquinone dyes, and azo dyes. The blending amount of the colorant is preferably 1 to 50% by mass with respect to the total amount of the solid drawing material. If it is smaller than this range, the handwriting visibility tends to be poor, and if it is larger than this range, the handwriting erasability tends to be poor. More preferably, it is 10 to 40% by mass, and in this range, visibility is good and handwriting erasability is also good, which is preferable.

  In the solid writing material of the present invention, various additives can be blended in order to improve other performances as long as the writing performance and the water resistance of the handwriting are not impaired. Specific examples include gelling agents, extenders, viscosity modifiers, antibacterial agents, antifungal agents, and fragrances.

  A gelling agent can be mix | blended for the purpose of performance improvement, such as smoothing the writing taste of solid cursive. As the gelling agent, oil-soluble and conventionally known ones can be used, and specific examples include fatty acids, or metal salts thereof, benzylidene sorbitols, amino acid oils, and the like. From the viewpoint of smoothing the writing taste, fatty acids are preferable, and 12-hydroxystearic acid is particularly preferable.

  As a mixture ratio of the said gelling agent, 10-20 mass% is preferable with respect to solid cursive total mass. When the amount is less than this range, the writing taste tends to be slightly heavier. When the amount is more than this range, the writing taste becomes smooth, but handwriting erasability tends to be poor.

  Further, the extender can be blended for improving the writing performance such as improving the strength of the solid writing material and obtaining a clear handwriting. Specific examples of the extender include talc, clay, silica, calcium carbonate, barium sulfate, alumina, mica, potassium titanate, glass flakes, corn starch, starch, and boron nitride.

  An example of the manufacturing method of the solid cursive of this invention is shown. Polyoxyalkylene polyglyceryl ether and higher alcohol are heated and mixed to obtain a liquid. A colorant and various additives as necessary are added to the liquid and stirred, and then filled into a predetermined mold. By cooling this, the liquid is solidified and a solid filling is obtained. A solid cursive body is obtained by taking out the solidified material in the mold from the mold.

(Manufacture of solid cursive letters)
Example 1
Polyoxypropylene polyglyceryl ether (Sakamoto Pharmaceutical Co., Ltd., SC-1600, polyoxypropylene repeating unit 24)
32 parts by mass Behenyl alcohol (higher alcohol) 32.5 parts by mass Titanium oxide (manufactured by Teika Co., Ltd., JR-701) 35.5 parts by mass The above components were heated and mixed at 90 ° C., and the resulting liquid material had an inner diameter of 8 mm. After pouring into a cylindrical mold having a length of 40 mm, the mixture was cooled to room temperature to obtain a solid. This cylindrical solid was taken out of the mold to obtain a solid cursive body having an outer diameter of 8 mm and a length of 40 mm.

Examples 2-10
A solid drawing material was obtained in the same manner as in Example 1 except that the formulation shown in Table 1 was used.

Comparative Example 1
Polyoxypropylene polyglyceryl ether (Sakamoto Yakuhin Kogyo Co., Ltd., SC-1600, polyoxypropylene repeating unit 24) 32 parts by mass 12-hydroxystearic acid 32.5 parts by mass Titanium oxide (Taika Co., Ltd., JR-701) 35.5 Part by mass The above components were heated and mixed at 90 ° C., and the obtained liquid was poured into a cylindrical mold having an inner diameter of 8 mm and a length of 40 mm, and then cooled to room temperature to obtain a solid. This cylindrical solid was taken out of the mold to obtain a solid cursive body having an outer diameter of 8 mm and a length of 40 mm.

Comparative Example 2
Behenyl alcohol (higher alcohol) 32 parts by mass 12-hydroxystearic acid 32.5 parts by mass Titanium oxide (manufactured by Teika, JR-701) 35.5 parts by mass The above components were mixed by heating at 90 ° C. The liquid material was poured into a cylindrical mold having an inner diameter of 8 mm and a length of 40 mm, and then cooled to room temperature to obtain a solid material. This cylindrical solid was taken out of the mold to obtain a solid cursive body having an outer diameter of 8 mm and a length of 40 mm.

Comparative Example 3
Behenyl alcohol (higher alcohol) 32 parts by mass Propylene glycol 32.5 parts by mass Titanium oxide (manufactured by Teika, JR-701) 35.5 parts by mass The above components were heated and mixed at 90 ° C. After pouring into a cylindrical mold having an inner diameter of 8 mm and a length of 40 mm, it was cooled to room temperature to obtain a solid. This cylindrical solid was taken out of the mold to obtain a solid cursive body having an outer diameter of 8 mm and a length of 40 mm.

  The writing performance, erasability, water resistance, and heat resistance of each of the solid writing materials of Examples 1 to 10 and Comparative Examples 1 to 3 were evaluated. The results are shown in (Table 2).

  Evaluation method: Writability, erasability, water resistance, heat resistance, and writing taste evaluation were evaluated by the following evaluation methods and evaluation criteria.

Writability: Written by handwriting at room temperature on a blackboard with a smooth surface that is water-resistant, wet and wet, and visually evaluated the writing properties and handwriting. did.
A: Writing is possible and handwriting is clear.
○: Writing is possible, but handwriting is slightly unclear.
Δ: Writing is possible, but almost no handwriting remains. However, visual recognition is possible.
X: Writing is impossible and handwriting cannot be visually recognized.

Erasability: The erased state when the handwriting written in the writing test was erased with a cloth was visually observed and evaluated.
A: The handwriting can be erased and no wiping is left.
○: The handwriting can be erased, and a slight wiping residue can be seen.
Δ: The handwriting can be erased, but the remaining wiping can be seen.
X: A handwriting remains and there is unwiping.

Water resistance: The handwriting written in the writing property test was placed under shower-like running water for 5 minutes, and the state of the handwriting was visually observed and evaluated.
A: The handwriting is not different from the written state and is clear.
○: The handwriting was slightly washed away and slightly blurred.
Δ: Most of the handwriting was washed away. However, visual recognition is possible.
X: The handwriting was completely washed away.

Heat resistance: Heated and stored for 1 week in an environment of 50 ° C., and the state of the solid curled material before and after that was visually observed and evaluated.
A: No change before and after heating.
○: A slight change in the surface is observed, but hardly changes.
Δ: An oily substance is observed on the surface.

Writing taste: Written by handwriting on a blackboard having a smooth surface with water resistance while the surface was dry, and the writing taste was evaluated by a sensory test.
A: The writing feel is very smooth.
○: Writing is smooth.
Δ: The writing taste is slightly hard and heavy.

  As shown in Table 3, the solid writing materials of Examples 1 to 10 had good writing properties and erasability, and the handwriting had water resistance. Also, the heat resistance of the solid cursive material is good, which is the subject of the present invention, excellent in writability and erasability even when the writing board is wet with water, and the handwriting written on the writing board has water resistance. The performance as cursive was satisfied.

  On the other hand, the solid cursives of Comparative Examples 1 and 2 had good writing properties but poor erasability. In addition, the solid cursive of Comparative Example 3 was excellent in writing and erasing properties on a dry surface, but the water resistance of the handwriting was poor. Thus, the solid cursives of Comparative Examples 1 to 3 did not have the performance as the solid cursives of the present invention.

  The present invention is not only useful as a solid cursive as a writing instrument, but can also be used as a solid cursive that can be used outdoors or around water.

Claims (1)

  A solid cursive comprising at least a polyoxyalkylene polyglyceryl ether, a higher alcohol, and a colorant.