WO2015080334A1

WO2015080334A1 - Thermochromic thermosetting craft rubber clay

Info

Publication number: WO2015080334A1
Application number: PCT/KR2013/011711
Authority: WO
Inventors: 유정희
Original assignee: 대일소재(주)
Priority date: 2013-11-27
Filing date: 2013-12-17
Publication date: 2015-06-04
Also published as: KR101480795B1

Abstract

The present invention relates to a thermochromic thermosetting craft rubber clay, and the purpose of the present invention is to effectively arouse curiosity and originality/creativity by providing a rubber clay which has no stickiness by using an inorganic compound as a main component and appropriately controlling the degree of plasticity; can be reused since a structure (model) is not hardened despite the structure being left alone; allows a structure to be elastic while being hardened when the structure is dried by a thermal oven machine; and allows its color to change depending on the temperature change. The 『thermochromic thermosetting craft rubber clay』 according to the present invention is prepared by mixing: on the basis of the total weight of the rubber clay, 60-80% of a gel-state silicone base obtained by mixing siloxane and silicone, dimethyl, methylvinyl, and vinyl group-terminated; on the basis of the total weight of the rubber clay, 15-25% of a plasticity degree controller composed of a powder type silica to control the hardness; on the basis of the total weight of the rubber clay, 1-5% of an oil type anti-solidifying agent composed of polydimethyl siloxane to prevent solidification; on the basis of the total weight of the rubber clay, 1-3% of a color pigment for displaying color; on the basis of the total weight of the rubber clay, 0.1-5% of a platinum hardener; and, on the basis of the total weight of the rubber clay, 0.01-3% of a thermochromic pigment of which the color changes depending on the temperature change.

Description

Functional rubber clay which discolors with temperature and can be thermally cured

The present invention relates to a functional rubber clay using non-sticky, reusable inorganic compounds that do not stick to hands and do not harden even after being left for a long time after making a work piece; More specifically, it relates to `` working rubber clay, which is discolored by temperature and can be thermally cured '', which can change its color according to temperature change and cause curiosity and creativity more effectively.

In general, the known rubber clay (aka rubber clay) is made so that children can easily play peacock; It is manufactured / sold in oily rubber clay or water-based rubber clay. Oily clay can maintain its shape as it is stored after it is produced, but it has a disadvantage that it is difficult for children to make a model from the material. And the water-based rubber clay is easy to use for children to play because the dough is easy, while a lot of moisture content of the sticky phenomenon in the manufacturing and shrinkage and distortion occurs when dried, it is difficult to store for a long time. In addition, the above-mentioned oil-based rubber clay and water-based rubber clay has a disadvantage in that it is hard to be easily reused after it is left after manufacturing the workpiece, and using an oven for the purpose of permanent storage after manufacturing the workpiece with oil-based rubber clay or water-based rubber clay. There is a disadvantage in that the hardening proceeds rapidly through the drying process, causing cracks in the workpiece.

In order to solve these shortcomings, Applicants make plasticity with inorganic compounds as the main ingredient, so that it does not stick to hands because it is not sticky and does not stick to hands for a long time after making a workpiece (model). When the workpiece is hardened, it is hardened and elasticity is applied, which is suitable for toys. The patent application was filed with the Korean Intellectual Property Office on March 30, 2011 (Application No. 10-2011-0028550), 2012. It is registered as of September 19, 2008 (registration number 10-1185815) and secures the right.

"The thermosetting functional rubber clay" disclosed in Republic of Korea Patent No. 10-1185815 is provided with 60 to 80% of the total weight of the rubber clay, and siloxane, silicon, dimethyl, methyl vinyl, vinyl group-terminated Gel base silicon is made of a mixture; It is provided with 15 to 35% by weight of the total rubber clay and made of a powder-based silica-based plasticity regulator for hardness control; It is provided with 1 to 5% by weight of the total rubber clay and made of polydimethylsiloxane system to prevent solidification in the form of an oil to prevent solidification; It is provided with 0.1 to 1% by weight of the total rubber clay and antibacterial agent to prevent bacterial growth; Platinum hardener is provided in 0.65 ~ 5% relative to the total weight of rubber clay; It is a technical feature that what was mixed.

In the thermosetting functional rubber clay composed of the composition as described above, since the inorganic compound having excellent transparency is mixed with the main component and the anti-solidification agent in the form of oil, it is not sticky and does not stick to the hand, leaving the workpiece (model) and leaving it for a long time. Even if not hard, there is an advantage that can be reused. In addition, a platinum hardener is added to the main component of the inorganic compound so that it is hardened in the process of drying with a hot oven and at the same time, elasticity is provided to make a workpiece suitable as a toy.

However, in the above-mentioned "Korean thermosetting rubber clay" disclosed in Korean Patent No. 10-1185815, it is possible to produce a variety of colors by changing the color pigments added, but the color itself cannot be changed. As a result, most infants and children who play with the action rubber clay have limitations to induce curiosity and creativity / creation.

The present invention is to solve this problem; The object of the present invention is to adjust the degree of plasticity of the inorganic compound as a main component appropriately, there is no stickiness and can be reused because it does not harden even if left to make a workpiece (model), and the elasticity is imparted to the workpiece as it is cured by drying with a hot oven Of course, the color itself changes according to the temperature change, which provides curiosity and creativity / creation more effectively.

In addition, another object of the present invention is to provide a "functional rubber clay discoloration and thermal curing that can be changed according to temperature" which can prevent bacterial growth even after repeated use by adding an antimicrobial agent to the main component of the inorganic compound.

In addition, another object of the present invention is to provide a "synthetic rubber clay which is discolored according to temperature and heat-curable," which can make a luminous work that can produce a variety of atmospheres by adding a photoluminescent agent to the inorganic compound main component.

The present invention for achieving this object is; In the functional rubber clay which is made of an inorganic compound so that it can be used repeatedly as a reaction degree and discolored with temperature and capable of thermosetting;

The working rubber clay; A gel-based silicone base provided with 60 to 80% of the total weight of the rubber clay and formed by mixing siloxane with silicon, dimethyl, methyl vinyl, and vinyl group-terminated; It is provided with 15 to 25% by weight of the total rubber clay and made of a powder-based silica-based plasticity regulator for controlling the hardness; It is provided with 1 to 5% by weight of the total rubber clay and made of polydimethylsiloxane system to prevent solidification in the form of an oil to prevent solidification; It is provided with 1-3% by weight of the total rubber clay and color pigments to produce a color; Platinum hardener is provided in 0.1 to 5% relative to the total rubber clay weight; Zion pigment is prepared in 0.01 to 3% based on the total weight of the rubber clay; Characterized in that made by mixing.

In addition, the present invention; The Zion pigment is gradually changed to transparent as the temperature is increased based on 25 to 28 ° C. When the Zion pigment is lowered below the reference temperature, the Zion pigment is a reversible Zion pigment that exhibits its own color.

In addition, the present invention; The working rubber clay is provided with 0.1 to 1% based on the total weight of the rubber clay and has an antimicrobial agent for preventing bacterial propagation; It is characterized in that it is made by further mixing.

In addition, the present invention; The working rubber clay contains 1 to 10% of a photoluminescent agent based on the total weight of the rubber clay; It is characterized in that it is made by further mixing.

According to the present invention made of a composition as described above "discolored according to temperature and thermosetting rubber rubber clay"; The inorganic compound is composed of the main component and is not sticky, so it does not stick to the hand and makes a workpiece (model) .It is not hardened even when it is left in the air and can be reused.It is hardened in the process of drying with a hot oven by adding a platinum hardener and elasticity. This has the effect of being able to make a suitable workpiece with a toy. In addition, the created work has a working effect that can more effectively induce the curiosity and creativity of children or infants by changing the color with temperature changes.

Further, according to the "functional rubber clay discoloration and thermosetting according to the temperature" according to the present invention; Since a small amount of antimicrobial agent is mixed with the main component of the inorganic compound, there is an advantage that can prevent bacterial growth even in repeated use.

Further, according to the "functional rubber clay discoloration and thermosetting according to the temperature" according to the present invention; Since a small amount of photoluminescent agent is mixed with the main component of the inorganic compound, there is an advantage that a workpiece having a luminous function can be produced.

Figure 1 shows the composition ratio of "functional rubber clay discoloration and thermosetting according to the temperature" according to the present invention.

Figure 2 schematically shows the principle of discoloration of Zion pigment applied to the present invention.

1. silicone base

2..Plasticity regulator

3. Antioxidant

4..Color Pigment

5. Platinum Hardener

6..Zion Pigment

7. Antibacterial

8. Phosphorescent

Hereinafter, one preferred embodiment and physical properties according to the present invention will be described in detail, which is intended to easily explain the invention to those skilled in the art to which the present invention pertains. It is not intended that the technical spirit and scope of the invention be limited.

As shown in FIG. 1, the "functional rubber clay discolored according to temperature and thermosetting" according to the present invention is a silicone base (1), a plasticity control agent (2), a solidification inhibitor (3), a color pigment ( 4), essential composition such as platinum hardener (5), Zion pigment (6) is made by mixing in an appropriate composition ratio, and by additionally mixing the antimicrobial agent (7) and the photoluminescent agent (8) as an additional composition can suppress bacterial propagation. It can give a luminous function.

The silicone base 1 contains 60 to 80 parts by weight based on the total rubber clay composition, and includes siloxanes and silicones, dimethyl, methylvinyl and vinyl group-. terminated), the silicon base (1) consisting of the above components serves to maintain the shape of the "working rubber clay". The silicon base 1 may be contained in an amount of 60 to 80 parts by weight based on the total weight of the rubber clay composition to facilitate molding and maintain a shape. When the silicon base 1 is contained in an amount exceeding 80 parts by weight, the formability of the workpiece is improved, but The shape can be easily deformed even afterwards. In an embodiment of the present invention, the silicone base 1 is composed of siloxane and silicones, dimethyl, methylvinyl, and vinyl groups of Chemical Service Summary No. 68083-18-1. Adopted a gel (GEL) state consisting of a mixture of terminated (vinyl group-terminated).

The plasticity regulator (2) is contained 15 to 25 parts by weight based on the total weight of the rubber clay composition, consisting of a powder-based silica, it is contained in the rubber clay composition serves to determine its plasticity (hardness). Such a plasticity regulator (2) is a powder of silica particles of 5 to 50,000 millimicron (Millimicron) powder, it is recommended to use the silicon dioxide (CAS No) 7631-86-9 of the silicon dioxide (Silicone Dioxide) desirable. In addition, silica is one selected from the group consisting of dry silica having particles of 5 to 20 millimicrons and wet silica having particles of 20 to 2,000 millimicrons, and diatomaceous earth having particles of 2,000 to 50,000 millimicrons. It may consist of the above. The dry silica (Fumed Silica) is very excellent in transparency and has the advantage of expressing a variety of colors clear, wet silica (Precipitated Silica) is not very excellent in transparency but can express the color clear. And since diatomaceous earth has a light gray or beige color, diatomaceous earth is not suitable for producing clear colors, but it is suitable for expressing dark colors.

The anti-solidifying agent (3) is contained 1 to 5 parts by weight based on the total weight of the rubber clay composition, made of a polydimethylsiloxane, it is contained in the rubber clay composition serves to prevent its solidification. This solidification agent (3) is in the form of a transparent oil (oil), it is preferable to use a polydimethylsiloxane (CAS No) 63148-62-9. The anti-solidification agent 3 composed of the above components serves as a lubricant to soften the rubber clay composition while delaying the curing of the silicone composition to solidify with time. In addition, the anti-solidification agent (3) consisting of polydimethylsiloxane is widely used in women's cosmetics and the like, and serves to prevent the solidification of the rubber clay composition, and also to brighten the shine and brightness on the surface of the rubber clay composition.

In addition, the color pigment 4 is contained in 1 to 3 parts by weight based on the total weight of the rubber clay composition, and serves to give a color (color) to the rubber clay composition excellent in transparency. In the rubber clay composition, when the silicone base (1), the plasticity regulator (2), and the hardening agent (3) is mixed and kneaded, it has a milky white color, and the powder has a color such as red, green, yellow, and blue. Mixing the color pigments (4) in the form can be made of a rubber clay composition of various colors.

In addition, the platinum hardener (5: aka, heat curing agent) is contained in 0.1 to 5 parts by weight based on the total weight of the rubber clay. The platinum hardener (5) serves to give elasticity at the same time the workpiece is cured in the process of drying the workpiece (or molded article) made through the silicone composition in an oven. If the content of the platinum hardener (5; thermal curing agent) is less than 0.1%, it is difficult to store for a long time because the workpiece is hard to harden and deformation may be caused by external force even after manufacture. On the other hand, if the content of the platinum hardener (5; thermal curing agent) is excessively 5% or more, the curing time is too short and may harden in the process of manufacturing the workpiece.

The platinum hardener 5 is composed of 0.05 to 1.5 parts by weight of a platinum catalyst based on the total weight of rubber clay and 0.05 to 3.5 parts by weight of a cross-linking agent based on the total weight of the rubber clay. It is preferable to use what consists of the same structure, and it will harden the organovinyl polysiloxane which the vinyl group substituted at the terminal, and the organohydrogen polysiloxane in which the hydrogen element is directly bonded to the silicon element.

Platinum catalyst constituting the platinum hardener (5) in the present invention is Platinate (2-), hexachloro-, (OC-6-11) -dihydrogenreaction products with 2, 4, 6, 8 in Siloxanesandsilicones, di-Me, Mevinyl, vinylgroup-terminated -terraethenyl-2, 4, 6,8-tetramethylcyclotetrasiloxane is mixed. In the present invention, the crosslinking agent constituting the platinum hardener (5) is Siloxanesandsilicones, di-Me, Mevinyl, vinylgroup-terminated, Siloxanes and silicones, di-Me, mMe hydrogen, Dichlorodimethylsilane reaction products with silica, 1,3, 5-Triazine-2,4,6 (1H, 3H, 5H) trione, 1,3,5-tri-2-propenyl- and 1-Ethynylcyclohexanol are mixed.

In addition, Zion pigment (6) is mixed with 0.01 to 3% by weight of the total rubber clay composition, which is made of a powder form that changes color with temperature changes. Zion pigment (6) is basically transparent when the temperature rises above the reference temperature is divided into reversible and irreversible depending on whether or not to return to the original color when the temperature falls again. Reversible Zion pigments can be used again after being returned to their original color, while irreversible Zion pigments are one-time that do not return to their original colors. In more detail, the reversible Zion pigment, for example, a black pigment having a reference temperature of 20 ℃, that is, a pigment that changes to transparent at 20 ℃ or more; When the room temperature is 10 ℃, it appears black and gradually changes to transparent when the temperature exceeds 20 ℃. When the ambient temperature is 30 ℃, the color becomes transparent when the temperature falls below 20 ℃. As shown in FIG. 2, the Zion pigment 6 is basically composed of a microcapsule material, and in the capsule, an electron donor and an electron acceptor are used as the constituent material and the temperature decreases. The materials combine to give color, and when heated, they separate and become transparent.

Zion pigment (6) in the embodiment of the present invention has been adopted in the form of a powder so that it is easily mixed with other compositions, gradually changes to transparent as the temperature is raised on the basis of 25 ~ 28 ℃ below the reference temperature Downward, it was composed of a reversible Zion Pigment exhibiting its own color. Adopting a Zion pigment with a discoloration reference temperature of 25 ~ 28 ℃ is easy to visually confirm that the color of the "workpiece rubber clay" according to the present invention universally played with children or infants at room temperature, even in a small temperature difference To do so. In addition, the Zion pigment 6 has its own color and is mixed with the color pigment color that is basically mixed in the rubber clay composition, thereby making a functional rubber clay having more various colors. Zion pigment is applied in the form of a powder, but not limited thereto, it is a matter of course that a liquid Zion slurry (Thermochromic-Slurry) can be applied}

On the other hand, the antimicrobial agent 7 may be additionally mixed with 0.1 to 1 parts by weight based on the total weight of the rubber clay composition, and serves to prevent the growth of bacteria in the rubber clay composition. The antimicrobial agent 7 may be used in any form such as liquid or powder as long as it can impart antimicrobial properties to the rubber clay composition. The rubber clay composition containing the antimicrobial agent 7 inhibits the growth of bacteria after the preparation is completed. It serves to block the user from playing with the rubber clay composition as a toy from bacteria.

In addition, the photoluminescent agent 8, which may be additionally mixed, is contained in an amount of 1 to 10 parts by weight based on the total weight of the rubber clay composition, and when the aluminum-based photoluminescent agent having a particle size of 3 to 10,000 milli microns is mixed, light energy is accumulated by itself. It is possible to make rubber clay compositions that emit light when it is dark. In the embodiment of the present invention, although the aluminum series is adopted as the photoluminescent agent 8, various kinds of photoluminescent agents may be selected and applied.

Next will be described the manufacturing process of the functional rubber clay discolored according to the temperature according to the present invention the composition is applied as described above.

First, the manufacturing process of the working rubber clay according to the present invention is a kneading step of kneading the silicon base (1), the plasticity control agent (2), the solidification inhibitor (3) by primary mixing, and the color pigment after this kneading process (4), the platinum curing agent (5), Zion pigment (6: may contain antibacterial and photoluminescent agent) is divided into mixing process.

The kneading process is performed by using a dough reader on a silicon base (1) of 60 to 80% of the total rubber clay weight, a plasticity modifier (2) of 15 to 25% of the total rubber clay weight, and a total rubber clay weight. It is a process of kneading 1 to 5% of the solidification inhibitor (3). After this kneading process, the silicone base 1, the plasticity control agent 2, and the solidification inhibitor 3 are evenly mixed to complete the rubber clay in the form of dough (DOUGH).

The mixing process was then carried out using a roller mixer with a color pigment (4) of 1 to 3% of the total rubber clay weight, a platinum hardener (5) of 0.1 to 5% to the total rubber clay weight, and a total rubber clay weight. 0.01 to 3% of Zion pigment (6) is a step of additionally mixing the rubber clay in the form of dough. Through this mixing process; The functional rubber clay which is discolored and thermoset according to the temperature according to the present invention is finally completed.

Such a working rubber clay can be applied to a different color pigments (4) and Zion pigments (6) to implement a variety of colors, the most important in the manufacture of the working rubber clay is the composition ratio of each composition each composition It is preferable to prepare them separately and then mix them.

On the other hand, by adding a predetermined amount of antimicrobial agent (7) in the mixing process during the production of the working rubber clay to prevent bacteria propagation, by adding a predetermined amount of the photoluminescent agent (8) can emit light at night to produce a variety of atmospheres Can produce luminous workpieces. In addition, if the user directly removes a part of the working rubber clay having different colors and mixes them, the rubber clay dough having another color can be freely made.

Next will be described with reference to the physical properties according to the composition ratio of the "functional rubber clay discoloration and thermal curing depending on the temperature" according to the present invention as described above.

70 parts by weight of silicone base, 22 parts by weight of plasticity regulator, 3 parts by weight of anti-solidification agent, 1 part by weight of color pigment, 3 parts by weight of platinum hardener, 1 part by weight of Zion pigment were mixed and kneaded to prepare a rubber ball for clay.

Comparative Example 1

80 parts by weight of silicone base, 12 parts by weight of plasticity regulator, 3 parts by weight of anti-hardening agent, 1 part by weight of color pigment, 3 parts by weight of platinum hardener, 1 part by weight of Zion pigment were mixed and kneaded to prepare a rubber ball for clay.

Comparative Example 2

A silicone rubber was prepared by mixing 38 parts by weight of a silicon base, 57 parts by weight of a plasticity regulator, 3 parts by weight of a solidifying agent, 1 part by weight of a color pigment, 3 parts by weight of a platinum hardener, and 1 part by weight of a zion pigment.

The plasticity over time change (unit: Units) of the functional rubber clay prepared in Example 1 and Comparative Examples 1 to 2 described above are shown in Table 1 below.

(Experimental condition: The plasticity meter used as the test standard is to find the plasticity by inserting a sample between two parallel shelves and applying a predetermined load to read the time and thickness change with a dial indicator;

① Specification: ASTMD-926

② Type: Williams Type

③ Standard Specification: Pressurized Load: 5Kg, Pressurized Area: Diameter 60mm,

Dial gauge: Stroke 15 mm or more, 1/100 mm, body weight: approx. 10 kg

④ Sample preparation: sample thickness 10mm, cylinder diameter 16mm

⑤ Test method: a. Set the dial indicator to zero.

b. Wait until the tester environment temperature has stabilized.

c. Quickly insert the sample between the two parallel shelves.

d. Read the gauge after the time you want to measure.)

Table 1

division	1 day	2 days	3 days	4 days	5 days	Remarks
Example 1	206	182	189	196	195	The product shape is maintained after working for a long time
Comparative Example 1	209	191	191	198	190	Plasticity is too low, distortion after work
Comparative Example 2	Experiment not possible					Product not created

As shown in the above [Table 1], the functional rubber clay prepared in Example 1 did not harden at all even after being left at room temperature for a long time, and the product model was well shaped even when the workpiece was molded into a product with proper plasticity. It is not easy to form the workpiece, so it can be stored for a long time.

However, the functional rubber clay prepared in Comparative Example 1 was not hardened at all even after being left at room temperature for a long time, and the plasticity was so low that even when the workpiece was molded, the model of the workpiece was distorted, and the functional rubber prepared through Comparative Example 2 Clay was unable to manufacture a workpiece because the product was broken, not made.

The plasticity over time changes (units) of the functional rubber clay and the other company's products manufactured through Example 1 were measured and shown in the following [Table 2].

TABLE 2

division	1 day	2 days	3 days	4 days	5 days	Remarks
Example 1	206	182	189	196	195	Not harden even after long time
Company A	214	269	446	746	568	Surface hardens after 1 day and crumbles during work
Company B	267	430	473	554	427	Surface hardens after 1 day and crumbles during work
Company C product	707	716	692	694	702	Plasticity too high from the beginning

As can be seen in the above [Table 2], in the case of the working rubber clay according to the present invention there will be some errors in the measurement, even if left at room temperature for a long time there is no large change in the degree of plasticity, while work is possible, In case of company A, plasticity improves as time goes by. If more than 1 day elapses, the surface is cracked and work is impossible.In case of company B, plasticity increases as time passes. If the above elapses, the surface is hardened like a sponge, so it is impossible to work. In the case of C company, the plasticity is high from the beginning, and it is very unsuitable for infants and children to make a workpiece.

On the other hand, rubber clay dough that changes its own color according to temperature changes by adjusting the content ratio of the color pigment (4) and platinum hardener (5) and Zion pigment (6) that is essentially mixed in the rubber rubber clay according to the present invention You can make For example; The yellow-colored pigment is mixed with the rubber rubber according to the present invention is dark yellow at room temperature (18 ℃), but at 40 ℃ Zion pigment color becomes transparent to a pale yellow close to white as a whole, the color of orange Pigmented rubber clay according to the present invention is dark orange at room temperature (18 ℃), and turns to pale orange at 40 ℃, the rubber rubber clay according to the present invention mixed with a purple color pigment is a room temperature ( 18 ℃), it becomes dark purple, and at 40 ℃ it turns to pale light blue. Accordingly, when the workpiece is made with the working rubber clay according to the present invention, the color of the workpiece is changed in accordance with the temperature, thereby inducing curiosity and creativity / creation more effectively for children or toddlers.

In addition, by heating the made workpiece at a temperature of about 200 ℃ using a heat oven for 10 minutes, the elasticity is imparted while being cured, it is possible to preserve the shape.

In addition, as described above in the functional rubber clay according to the present invention as described above, in addition to the essential composition, the antimicrobial agent (7) and the photoluminescent agent (8) may be additionally mixed to suppress bacterial propagation and impart luminous function. Of course you can.

The present invention has a silicone base as a main material is non-sticky and can be widely used in the field of the functional rubber clay that can be reused because it does not harden even after leaving for a long time after making the workpiece.

Claims

In the functional rubber clay which is made of an inorganic compound so that it can be used repeatedly as a reaction degree and discolored with temperature and capable of thermosetting;

The working rubber clay is;

A gel-based silicone base provided with 60 to 80% of the total weight of the rubber clay and formed by mixing siloxane with silicon, dimethyl, methyl vinyl, and vinyl group-terminated;

It is provided with 15 to 25% by weight of the total rubber clay and made of a powder-based silica-based plasticity regulator for controlling the hardness;

It is provided with 1 to 5% by weight of the total rubber clay and made of polydimethylsiloxane system to prevent solidification in the form of an oil to prevent solidification;

It is provided with 1-3% by weight of the total rubber clay and color pigments to produce a color;

Platinum hardener is provided in 0.1 to 5% relative to the total rubber clay weight;

Zion pigment is prepared in 0.01 to 3% based on the total weight of the rubber clay; It is a functional rubber clay which is discolored and thermally cured according to temperature, which is made by mixing.
The method of claim 1,

The Zion pigment is gradually changed to transparent as the temperature is increased based on 25 to 28 ° C. When the temperature is lower than the reference temperature, the Zion pigment is reversible according to temperature, which is characterized by being a reversible Zion pigment indicating its own color. Possible rubber clay.
The method of claim 1,

The working rubber clay is;

It is provided with 0.1 to 1% by weight of the total rubber clay and antibacterial agent to prevent bacterial growth; It is a functional rubber clay which is discolored and thermoset according to temperature, characterized in that it is made by further mixing.
The method of claim 1,

The working rubber clay is;

1-10% of the photoluminescent agent by weight of the total rubber clay weight; It is a functional rubber clay which is discolored and thermoset according to temperature, characterized in that it is made by further mixing.