KR20090084032A - Scavenging crayons - Google Patents

Abstract

Since there is no possibility of dust, it is harmless to the human body, and it is easy to clean and maintain. to provide.

Description

Scavenging Crayons {Removalable Cryon}

The present invention relates to an erasable crayon, and more particularly, to an erasable crayon that can be applied to non-absorbing surfaces such as whiteboard, glass, plastic, iron plate, wood, etc., and can be easily erased using paper, cloth, or the like. It is about.

In general, the erasing applicator is widely used in schools, homes, offices, and the like because it has an advantage of being easily erased after writing.

One of the conventional erasing applicator chalk is still widely used in schools, schools, and the like.

By the way, since the chalk generates a lot of dust during erasing or cleaning, the chalk adversely affects the health of the human body and exposes many problems such as polluting the surrounding environment.

Therefore, it is urgent to develop an erasing applicator which can replace the chalk while being harmless to the human body and preventing environmental pollution.

The present invention has been made through continuous research and development to improve the problems of the prior art as described above, using a wax, a nonionic surfactant, a sieving material, a pigment, the wax is 20 ~ 30 ℃ difference in melting point By using a non-ionic surfactant is a liquid at room temperature and the HLB value of 8 to 13 by using a thing that does not worry about dust generation, and to provide an erasable crayon with excellent coating feeling and scavenging properties, the purpose is to have.

The erasable crayon proposed by the present invention comprises a wax, a nonionic surfactant, a sieving material, and a pigment.

The wax is used as an excipient, and a wax having a melting point of 20 to 30 ° C. is used. In the above, the wax is used in the range of 20 to 40%.

As the wax, one or more selected from petroleum wax, vegetable wax, and synthetic wax is used.

In using the wax, if it is required to have a high melting point temperature, it is preferable to use the synthetic wax Fisher-Tropsch Wax, and if a low melting point temperature is required, petroleum wax paraffin wax, microcrystallin It is preferable to use a wax or the like.

In the above, when the temperature difference is less than 20 ℃, the deterioration of the deterioration worsens, the temperature difference is more than 30 ℃ when the coating is not good, the composition is weak to the impact strength during molding, so break even in a small impact. .

The nonionic surfactant is used to impart scavenging properties, and is liquid at room temperature and uses a HLB (Hydrophilic Lipophilic Balance) value in the range of 8 to 13.

In the above, the nonionic surfactant is not preferable because the use of a solid at room temperature is bad scavenging.

In addition, when the HLB value is less than 8, the scavenging property is good, but it is difficult to apply to the non-absorbing surface, and when it is more than 13, the dispersibility with the wax worsens, so the separation phenomenon occurs.

As said nonionic surfactant, polyoxy ethylene alkyl ether and poly oxy ethylene alkyl ester are used individually or in mixture within 5 to 40% of range.

In the above, the nonionic surfactant is preferably 10 to 30%.

The sieve material is used for viscosity control during molding, and generally used sieve material widely used in crayons, crayons, colored pencils, etc. within the range of 5 to 50%.

As the sieve material, talc, clay, calcium carbonate, bentonite, or the like may be used.

The said pigment is used in 5 to 30% of range.

As the pigment, organic pigments, inorganic pigments, fluorescent pigments and the like can be used.

According to the erasable crayon according to the present invention, there is no fear of dust generated like chalk, so that the human body is harmless and user convenience such as cleaning or maintenance is improved.

In addition, when applied to the non-absorbing surface, the feeling of application is excellent, so that writing becomes easy.

In addition, since the eraser is excellent, marks are erased by using paper or cloth without leaving marks, and the convenience of the user is greatly improved.

Next, a preferred embodiment of the erasable crayon according to the present invention will be described, but the present invention is not limited thereto.

Example 1

 Fisher-Tropsch Wax (melting point 100 ° C) 25% and micro crystalline wax (melting point 78 ° C) 25%, constituent kaolin clay 20%, pigment yellow 2GS (trade name; manufactured by Uksung Chemical Co., Ltd.) 10%, nonionic 20% of a polyoxyethylene alkyl ester (HLB 11), which is a surfactant, was heated and stirred at 100 ° C in Hensyl, and then injected into a mold to obtain Example 1 of a yellow scavenging crayon according to the present invention.

Example 2

 Fisher-Tropsch Wax (melting point 85 ° C) 25% and paraffin wax (melting point 60 ° C) 25%, constituent kaolin clay 20%, pigment yellow 2GS (trade name; manufactured by Uksung Chemical Co., Ltd.) 10%, nonionic surfactant 20% of phosphorus polyoxyethylene alkyl ester (HLB 11) was injected into a mold after heating and stirring at 100 ° C. in Hensyl, to obtain Example 2 of a yellow scavenging crayon according to the present invention.

Comparative Example 1

Fisher-Tropsch Wax (melting point 85 ° C) 25% and micro crystalline wax (melting point 78 ° C) 25%, constituent kaolin clay 20%, pigment yellow 2GS (trade name; manufactured by Uksung Chemical Co., Ltd.) 10%, nonionic 20% of a polyoxyethylene alkyl ester (HLB 11) which is a surfactant was heated and stirred at 100 ° C in Hensyl, and then injected into a mold to obtain Comparative Example 1 of a yellow scavenging crayon.

Comparative Example 2

Fisher-Tropsch Wax (melting point 100 ° C) 25% and micro crystalline wax (melting point 78 ° C) 25%, constituent kaolin clay 20%, pigment yellow 2GS (trade name; manufactured by Uksung Chemical Co., Ltd.) 10%, nonionic 20% of polyoxyethylene alkyl ether (HLB 15), which is a surfactant, was heated and stirred at 100 ° C in Hensyl, and then injected into a mold to obtain Comparative Example 2 of a yellow scavenging crayon.

Comparative Example 3

Fisher-Tropsch Wax (melting point 100 ° C) 25%, micro crystalline wax (melting point 78 ° C) 25%, constituent kaolin clay 20%, pigment yellow 2GS (trade name; manufactured by Uksung Chemical Co., Ltd.) 10%, nonionic 20% of polyoxyethylene alkyl ether (HLB 6), which is a surfactant, was heated and stirred at 100 ° C in Hensyl, and then injected into a mold to obtain Comparative Example 3 of a yellow scavenging crayon.

The coating feeling and the erasing property were examined with Example 1 and Example 2 and Comparative Examples 1 to 3 obtained as described above.

In the above, the coating feeling test was carried out by a method in which 10 panels were applied to a white board, and the erasing test was visually determined as the number of times of erasing when the paper was erased at a pressure of approximately 1 kg / cm 2 using a cloth. The results are shown in Table 1 below.

division Application Scavenging Example 1 ◎ ◎ Example 2 ◎ ◎ Comparative Example 1 ◎ △ Comparative Example 2 - - Comparative Example 3 △ ◎

In the above, the feeling of applicability and scavenging were evaluated as "good" with very good, "good" with good, "△" with bad, and bad with "-".

As can be seen from Table 1, in Examples 1 and 2, it was confirmed that the coating feeling and the elimination property were very good.

And in the case of Comparative Example 1 the melting point temperature difference of the wax is too small, the coating feeling is very good, but it was confirmed that the scavenging is not good, in the case of Comparative Example 2 the non-ionic surfactant HLB is too high coating feeling and It was confirmed that the scavenging was bad, in the case of Comparative Example 3, when the HLB of the nonionic surfactant is too low, the scavenging property is very good, but the coating feeling was not good.

In the above, a preferred embodiment of the erasable crayon according to the present invention has been described, but the present invention is not limited thereto, and various modifications and changes can be made within the scope of the claims and the detailed description of the invention and the accompanying drawings. This also belongs to the scope of the present invention.

Claims (6)

An erasable crayon composition comprising 20 to 40% wax, 5 to 40% nonionic surfactant, 5 to 50% sieving material, and 5 to 30% pigment. The method according to claim 1, The wax is an erasable crayon composition used by selecting one or more of the difference in melting point 20 ~ 30 ℃ petroleum wax, plant wax, synthetic wax. The method according to claim 1 or 2, The nonionic surfactant is a liquid at room temperature and the erasable crayon composition using a HLB value of 8 to 13. The method according to claim 3, As the nonionic surfactant, an scavenging crayon composition using polyoxyethylene alkyl ether and polyoxyethylene alkyl ester alone or in combination. The method according to claim 1 or 2, The sieving material is an erasable crayon composition used alone or in combination of talc, clay, calcium carbonate, bentonite. The method according to claim 1 or 2, The pigment is an erasable crayon composition using one or more of organic pigments, inorganic pigments, fluorescent pigments alone or in combination.