JPS60110772A - Chalk - Google Patents

Abstract

PURPOSE:To provide a chalk which can be written on the surfaces of various materials and whose handwriting can be readily erased by rubbing with paper or cloth, by combining an animal or vegetable wax with a nonionic surfactant, adding a pigment thereto and molding the mixture. CONSTITUTION:A mineral wax (e.g. paraffin) and optionally PP resin are added to an animal or vegetable wax (e.g. rice bran wax). The mixture is molten by heating and mixed with a nonionic surfactant (e.g. polyoxyethylene spermoleylstearyl ether), and the resulting mixture is cooled to 55-60 deg.C. An org. pigment and precipitated CaCO3 are added to the mixture. The resulting mixture is melt- kneaded at 80-90 deg.C and cast into the desired shape.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to chalk used to write letters, pictures, etc. on a white board or the like.

PRIOR TECHNOLOGY A conventional writing instrument (yo) used for whiteboards is impregnated with volatile liquid ink, and when the cap is removed when using the ICC pear type, the volatile solution gets on the skin, making it easy to forget to tighten the cap. If it was loose, the liquid would evaporate and the ink would become sticky, making it hard to get old or making it impossible to write on it without you even realizing it.

In addition, solid writing instruments such as crayons require a special solvent to erase characters written on a whiteboard or P, and are difficult to erase with water, dry paper, cloth, etc.

Purpose: In order to solve the above-mentioned drawbacks, the present invention is intended to form a solid ink like a crayon without using volatile liquid ink, and to apply it to not only white boards but also metals and porcelain.

The objective is to provide chalk that can be applied to glass, various synthetic resins, and coatings thereof, and that can be easily wiped off with paper or cloth.

The present invention is characterized in that it is a chalk made by bonding an animal or vegetable wax with a nonionic surfactant having a low coefficient of friction, further adding a desired pigment, and molding it into a solid.

EXAMPLE 1 To produce the chalk of the present invention, animal or vegetable waxes such as wax such as carnauba wax, castor oil wax, rice bran wax, stearic acid, beeswax,
Amide wax, wool grease, etc. are used, mineral waxes such as paraffin, secylene, montan wax, etc., and polypropylene resin are added one after another to the rice boiler as necessary, and these waxes are melted together. Raise the temperature so that When these waxes become molten, HLB, which is a nonionic surfactant with a low coefficient of friction, is 11.0°11.9.14
．． 0 or 16.6 polyoxyethylene spam oleyl ether or l-I LB is 1.3.7.15
．． Add 0.16.6 or 10°6 of polyoxyethylene stearyl ether, stir well and reduce the temperature to 55°-60°C. Next, while stirring with a roll or propeller stirrer, the desired organic pigment dye is added.

At this time, light calcium carbonate is added to make it easier to wipe off even when the object is of a complementary color to the coloring matter to be added, thereby facilitating the movement of chalk particles.

Next, this mixture is again heated on the rice boiler for 80' to 90'
Raise the temperature to 0°C to make a melt, pour it into a desired mold at 75°-90°C in the same manner as making candles, and heat it to 10° to 2°C.
Shape into a solid by quenching with cold IJl water at 0°C. The diameter of the choke is 7m111~101II depending on the purpose of use.
The color of Il11 may be appropriately selected from red, blue, black, white, etc.

The formulation examples are not shown below in comparison.

(Formulation Example 1) (Formulation Example 2) Effects of the Invention The chalk of the present invention is molded into a solid, so it is easy to use.
You can see at a glance how the liquid is being reduced, and since volatile liquid ink is not used, there is no need for caps or containers, and the drawbacks associated with volatile liquids, such as in the conventional box type, are eliminated, and the product can be supplied at a low price.

In addition, since a nonionic surfactant is bonded to an animal or vegetable wax, the animal or vegetable wax binds to the nonionic surfactant and is charged to one ion, so that when wiping, the fill electricity causes the paper or The cloth is charged with a potential of 10, making it easier for chalk particles to move to the paper or cloth being wiped off, making it easy to wipe off, and because it has an affinity for water, it can be wiped away with a damp cloth or water. It can be easily wiped off.

In addition, whiteboards, metals, porcelain, and glass.

It can be widely used to cover synthetic resins, cloth, etc., and is very convenient.

Patent applicant Matsu Tsuki Fu! Deputy Attorney Patent Attorney Tsukasa Takemoto Matsu (one idiot) Procedural Amendment June 1980 29E1 Commissioner of the Patent Office Manabu Shiga 1, Indication of Tenancy Patent Application No. 217763 of 1983 2, Invention Name Chalk 3, Person making the amendment 'It ('l What relationship Special Vl Applicant 11 2-53-7 Denenchofu, Ota-ku, Tokyo Name Matsukawa-) Sa 4, Agent 〒105 (and 1 other person) 5 , The mortar of the amendment order (= I spontaneous amendment) 8. Add the sentence of the order of ``Choose J: I.'' in the 3rd line of the 4th page of the content of the amendment.

[Also, in order to make the written part clearer, it is even more effective to use opaque titanium oxide at 4% for the face (131.6%). J, '7 Supplement 1 2 July 10, 1981 Commissioner of the Patent Office Manabu Shiga Tonoka σI! 1. Display of the case Patent Application No. 217763 of 1982 2, Name of the invention Chalk 3, Person making the amendment Relationship with the case Patent Applicant address 2-53-7 Denenchofu, Ota-ku, Tokyo Name Matsui) Sa 4, Agent 〒105 (and 1 other person) 5. Date of amendment order (no voluntary amendment) 6.7ifi
Number of inventions to be increased due to amendment None 7. Subject of amendment Detailed explanation of the invention in the specification column 8, Contents of the amendment June 29, 1981. Correct as shown below.

Add the following sentence next to ``You can choose.'' on page 4, line 3 of MeiWl1MJ.

[Also, in order to make the divined area clearer, it is even more effective to mix R3W and a white pigment with horns such as barium sulfate, zinc oxide, titanium oxide, etc. at 4% to 6% of the normal pigment. ”

Claims (1)

[Claims] Chalk is characterized by combining animal or vegetable wax with a nonionic surfactant, adding pigment, and forming it into a solid.