KR20160092167A - A rubber clay for handicraft - Google Patents

Abstract

The present invention relates to a rubber clay for a handicraft, while discolored in response to UV rays. The object of the present invention is to provide a rubber clay which uses inorganic compounds as main ingredients to provide an adequate plasticizing degree, to make a handicraft without tackiness causing adhesion to the hands, to prevent solidification while being left, to allow reuse, and to induce curiosity and creativity through a color change in responsive to UV rays. According to the present invention, the rubber clay for a handicraft while discolored in responsive to UV rays comprises, based on the total weight of the rubber clay: 60-80% of a gel-like silicone base comprising Siloxanes and Silicones, di-Me, ME vinyl, vinyl group-terminated; 15-30% of a powder type silica-based plasticizing modifier for controlling hardness; 1-5% of polydimethylsiloxane-based oil type anti-solidifying agent for preventing solidification; 1-3% of a colorant for realizing a color; and 0.01-3% of a reversible photochromic pigment which undergoes a color change from a colorless state to a colored state when UV rays disappear and returns to a colorless state under the lack of UV lays.

Description

{A RUBBER CLAY FOR HANDICRAFT} which is discolored in response to ultraviolet rays.

The present invention relates to a cohesive rubber clay using an inorganic compound which is not tacky and does not get touched on hands, and which can be reused because it is not hardened even after being left for a long time after the work is made. More specifically, the present invention relates to an artificial rubber clay that is discolored in response to ultraviolet rays, which can cause curiosity and creativity more effectively by changing its color in response to ultraviolet rays.

Generally, the known artificial rubber clay (so-called rubber clay) is manufactured so that children can easily play the artificial clay. Such as an oil-based rubber clay or an aqueous rubber clay. The oil-based rubber clay can maintain its shape when it is stored after it is manufactured, but it has a disadvantage that it is difficult for children to make a model using the material because the rubber clay is hard. In addition, water-based rubber clay has a disadvantage in that it is easy to be used for children's play because of easy dough, while the water content is high, so that it tends to become tacky at the time of manufacture and shrinkage and warpage when dried. Further, the oil-based rubber clay and the water-based rubber clay have disadvantages that they can not be easily re-used when they are left standing after manufacturing the work.

In order to solve these drawbacks, the present applicant has made a proper plasticity based on an inorganic compound, so that it does not become tacky and does not adhere to the hands. Even if left standing for a long time by making a workpiece (model), it can be reused and can produce various colors (Application No. 10-2010-0053756) filed on June 08, 2010 and registered (Registration No. 10-1012314) on Jan. 26, 2011 to secure the right have.

The "cooperating rubber clay" disclosed in the Japanese Patent Registration No. 10-1012314 is a gel prepared by mixing 60 to 80% by weight of the total rubber clay with a mixture of silane, silicon, dimethyl, methyl vinyl and vinyl group-terminated A state of silicon base; 15 to 35% based on the total weight of the rubber clay; a plasticity modifier for adjusting the hardness of the silica-based powder system; An antioxidant of oil type which is composed of 1 to 5% based on the weight of the whole rubber clay and is composed of a polydimethylsiloxane system to prevent solidification; 0.1 to 1% based on the total weight of the rubber clay, and an antimicrobial agent for preventing bacterial growth; As a technical feature. In the cohesive rubber clay made of the above-mentioned composition, since the inorganic compound having excellent transparency is the main component and the antifaging agent in oil form is mixed, it does not stick to the hand and does not adhere to the hand, and the work (model) There is an advantage that it can be reused. Further, since an antibacterial agent is added to the main component of the inorganic compound, bacterial propagation can be prevented even if rubber clay is repeatedly used.

However, in the "cohesive rubber clay" disclosed in the above Patent No. 10-1012314, it is possible to produce various colors by changing the color pigments to be added, but it can not change the color by itself. Thus, there is a limit to induce curiosity and creativity / creativity in most infants and children who play with coarse rubber clay.

The present invention has been made to solve such a problem, An object of the present invention is to provide a method for producing a molded article, which is produced by appropriately forming an inorganic compound as a main component and having a good plasticity so that it is not tacky, Is to provide a " cohesive rubber clay that is discolored in response to ultraviolet rays ", which can change color and cause curiosity and creativity / creativity more effectively.

Another object of the present invention is to provide an antimicrobial agent which is capable of preventing the propagation of bacteria even after repeated use, by adding an antimicrobial agent to the main component of the inorganic compound.

Another object of the present invention is to provide an artificial rubber clay that is discolored in response to ultraviolet rays, which is capable of producing a luminous workpiece capable of producing a more varied atmosphere by adding a luminous agent to the main component of the inorganic compound.

According to an aspect of the present invention, In an artificial rubber clay made of an inorganic compound so that it can be repeatedly used for work, and is discolored in response to ultraviolet rays,

Said cooper rubber clay comprising; A gel state silicone base which is 60 to 80% of the total weight of the rubber clay and is composed of a mixture of siloxane and silicon, dimethyl, methyl vinyl and vinyl group-terminated; 15 to 30% based on the total weight of the rubber clay; a plasticity modifier for adjusting the hardness of the silica-based powder system; An antioxidant of oil type which is composed of 1 to 5% based on the weight of the whole rubber clay and is composed of a polydimethylsiloxane system to prevent solidification; A color pigment provided at 1 to 3% based on the total weight of the rubber clay and for producing a color; 0.01 to 3% based on the total weight of the clay clay, reversible color photographic material which changes color from colorless to colored in response to ultraviolet rays and returns from color to colorless when ultraviolet ray is eliminated; Are mixed with each other.

The present invention also provides An antibacterial agent for preventing the propagation of bacteria, wherein the coagulating rubber clay is provided at 0.1 to 1% based on the total weight of the rubber clay; And further mixed.

The present invention also provides Wherein the co-operating rubber clay comprises 1 to 10% of a phosphorescent agent based on the total rubber clay weight; And further mixed.

According to the " co-operating rubber clay that is discolored in response to ultraviolet rays " Since the inorganic compound is composed mainly of inorganic compounds, it is not tacky and does not adhere to the hands, so that a workpiece (model) is made, which is not hardened even when left in the air, and is reusable. Of course, the color changes from colorless to colored There is an effect that can induce curiosity and creativity of children and infants more effectively.

Further, according to the " coagulated rubber clay that is discolored in response to ultraviolet rays " A small amount of the antimicrobial agent is mixed in the main component of the inorganic compound, which is advantageous in that it prevents the propagation of bacteria even after repeated use.

Further, according to the " coagulated rubber clay that is discolored in response to ultraviolet rays " A small amount of a phosphorescent agent is mixed in the main component of the inorganic compound, thereby making it possible to produce a workpiece having a luminous function.

Fig. 1 shows the composition ratio of the co-fired rubber clay that changes color in response to ultraviolet rays according to the present invention.
Fig. 2 is a photograph of an actual product of the "co-operating rubber clay" according to the present invention in which the color changes in response to ultraviolet rays.

The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. And does not mean that the technical ideas and the scope of the invention are limited.

1, the silicone rubber 1, the plasticity regulator 2, the antifouling agent 3, the color pigment 4, the antioxidant 5, and the antioxidant 6, as shown in Fig. 1, (5) are mixed at a proper composition ratio, and the antimicrobial agent (6) as an additive composition and the phosphorescent agent (7) are further mixed to inhibit the propagation of bacteria, and the luminous function have.

Silicone base 1 is contained in an amount of 60 to 80 parts by weight based on the entire rubber clay composition and is composed of siloxanes and silicones, dimethly, methylvinyl and vinyl group- terminated). The silicone base (1) composed of the above components serves to maintain the shape of the "cohesive rubber clay ". Such a silicone base 1 should 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 its shape. If it exceeds 80 parts by weight, the moldability of the workpiece is improved, The shape can easily be deformed even after this. In an embodiment of the present invention, the silicon base 1 is treated with siloxanes and silicones of Chemical Service Summary No. (CAS No.) 68083-18-1, Dimethly, methylvinyl and vinyl groups, (GEL) mixed with vinyl group-terminated.

The plasticity modifier (2) is contained in 15 to 30 parts by weight of the entire rubber clay composition, and is composed of silica-based powder type, and is contained in the rubber clay composition to determine its plasticity (hardness). Such a plasticity modifier (2) is one in which the particles of silica are in the form of a powder of 5 to 50,000 millimicrons, and the use of silicon dioxide (CAS No. 7631-86-9) desirable. The silica may also be selected from the group consisting of dry silica having a particle size of 5 to 20 millimicrons and wet silica having a particle size of 20 to 2,000 millimicrons and diatomite having a particle size of 2,000 to 50,000 millimicrons Or more. The above-mentioned dry silica (Fumed Silica) is excellent in transparency and can express various colors clearly. Wet silica (Precipitated Silica) is not very excellent in transparency, but it can express color clearly. Diatomaceous earth is not suitable for producing clear colors because its color is light gray or beige, but it is suitable for expressing dark colors.

The antifouling agent (3) is contained in an amount of 1 to 5 parts by weight based on the total weight of the rubber clay composition, and is composed of a polydimethylsiloxane-based compound, and is contained in the rubber clay composition to prevent its solidification. The antifouling agent 3 is in the form of a transparent oil and it is preferable to use polydimethylsiloxane of Chemical Service Abstract No. (CAS No) 63148-62-9. The antifouling agent 3 of the above components serves as a lubricant that softens the rubber clay composition while delaying the curing and solidification of the silicone composition over time. In addition, the antifouling agent 3 made of polydimethylsiloxane is widely used for women's cosmetics and the like, and not only prevents solidification of the rubber clay composition, but also brightens the surface of the rubber clay composition.

The color pigment (4) is contained in an amount of 1 to 3 parts by weight based on the total weight of the rubber clay composition, and serves to impart color (color) to the rubber clay composition having excellent transparency. When only the silicone base 1, the plasticity modifier 2 and the antifouling agent 3 are mixed and kneaded in the above-described rubber clay composition, it is milky white, and powder having a color such as red, green, yellow, Mixing the color pigment (4) in the form of a color can produce a variety of co-operating rubber clay compositions.

In addition, the reversible photocatalyst (5) is mixed in an amount of 0.01 to 3% based on the weight of the entire rubber clay composition, and the powder is in the form of a color changing from colorless to colored in response to ultraviolet rays. The reversible photocatalyst (5) reacted with ultraviolet light (UV) and changed colorless to colored (self color), but reversed to return colorless when ultraviolet light was blocked.

This reversible photopile (5) is transformed from a twisted photochromatic molecule into a brightly colored, planar form when exposed to ultraviolet light. The relaxed form absorbs visible light very effectively, When the source of the molecule is removed, it is returned to the deactivation or rest state of the molecule. The reaction rate varies depending on the ambient temperature and chemical structure. The reaction wavelength may vary slightly from manufacturer to manufacturer, but it is generally developed in the wavelength range of UV-A, and its color development takes place within about 1 second. UV (ultraviolet) If it is blocked again, it returns to its original state within about 20 seconds. In practical applications, the intensity of ultraviolet rays (sunlight) has the greatest influence, and the time may be influenced by the thickness of the sample and the UV irradiation and time. In reversible photocatalyst manufacturers, Spiroxazines and Naphthopyrans are the main components.

In the embodiment of the present invention, the reversible photocatalyst (5) is made in powder form so that it can be easily mixed with other compositions, and is mixed with a color pigment color which is basically mixed with the rubber clay composition in its own color , It is possible to make a coarse rubber clay having more various colors.

On the other hand, the antimicrobial agent (6) which can be mixed additionally is contained in an amount of 0.1 to 1 part 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 (6) can be any liquid type or powder type as long as it can impart antimicrobial properties to the rubber clay composition. The rubber clay composition containing the antimicrobial agent (6) can inhibit the growth of bacteria Thereby preventing the user who plays the rubber clay composition with the toys from being infected by the bacteria.

The luminous agent 7 which can be further mixed is contained in an amount of 1 to 10 parts by weight based on the total weight of the rubber clay composition. When an aluminum-based luminous agent having a particle size of 3 to 10,000 microns is mixed, light energy is accumulated by itself A rubber clay composition that emits light when it is dark can be made. In the embodiment of the present invention, aluminum is adopted as the phosphorescent material 7, but it is needless to say that various kinds of phosphorescent materials can be selected and applied.

Hereinafter, a process for producing an artificial rubber clay that is discolored in response to ultraviolet rays according to the present invention to which the above composition is applied will be described.

First, the manufacturing process of the cohesive rubber clay according to the present invention comprises a kneading step of kneading and mixing the silicon base 1, the plasticity modifier 2 and the anti-static agent 3, (4) and a photocatalyst (5: may contain an antimicrobial agent and a phosphorescent agent) are added and mixed.

The kneading process is performed by using a kneading reader to prepare a silicone base (1) having 60 to 80% of the total rubber clay weight, a plasticity adjusting agent (2) having 15 to 30% of the total rubber clay weight, Is kneaded with 1 to 5% of the antifogging agent (3). After the kneading process, the silicone base 1, the plasticity regulator 2, and the antifogging agent 3 are evenly mixed to complete the rubber clay in a DOUGH form.

Subsequently, in the mixing process, a color pigment (4) of 1 to 3% with respect to the weight of the entire rubber clay (4) and a visual light (5) of 0.01 to 3% It is a further mixing step in the clay. Through this mixing process, The co-fired rubber clay which is discolored in response to ultraviolet rays according to the present invention is finally completed.

These co-operating rubber clays can be applied with color pigments (4) and visual light coats (5) of different colors for various color implementations, and since the mixing ratio of each composition is most important in the production of co- It is preferable to separately prepare the compositions and then mix them.

On the other hand, in the production of coagulated rubber clay, adding a certain amount of antimicrobial agent (6) in the mixing process can prevent the propagation of bacteria, and adding a predetermined amount of phosphorescent agent (7) A luminous workpiece can be produced. In addition, if the user manually removes some of the colored rubber clay and kneads them, the rubber clay dough having another color can be made freely.

Hereinafter, the physical properties according to the composition ratio of the co-fired rubber clay that changes in response to ultraviolet rays according to the present invention will be described.

≪ Example 1 >

70 parts by weight of a silicone base, 25 parts by weight of a plasticity modifier, 3 parts by weight of an antifogging agent, 1 part by weight of a color pigment and 1 part by weight of a photocatalyst were mixed and kneaded to prepare a cooperating rubber clay.

≪ Comparative Example 1 &

80 parts by weight of a silicone base, 15 parts by weight of a plasticity modifier, 3 parts by weight of an antifogging agent, 1 part by weight of a color pigment and 1 part by weight of a photocatalyst were mixed and kneaded to prepare a cooperating rubber clay.

≪ Comparative Example 2 &

38 parts by weight of a silicone base, 57 parts by weight of a plasticity modifier, 3 parts by weight of an antifogging agent, 1 part by weight of a color pigment and 1 part by weight of a photocatalyst were mixed and kneaded to prepare a cohesive rubber clay.

The change in plasticity with time of untreated plastic clay prepared in Example 1 and Comparative Examples 1 and 2 was measured and shown in Table 1 below.

(However, the plasticity meter used as the test standard is to load the specimen between two parallel racks and apply a predetermined load, and read the time and thickness change with a dial indicator to obtain plasticity.

① Specification: ASTMD-926

② Type: Williams Type

③ Standard specification: Pressurized load: 5Kg, Pressurized area: 60mm in diameter,

            Dial gauge: Stroke 15mm or more 1 / 100mm, Body weight: about 10kg

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

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

             b. Wait until the temperature of the environment is stable.

             c. Place samples quickly between two parallel shelves.

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

<Table 1>

As shown in Table 1, the co-active rubber clay prepared in Example 1 did not harden at all even after being left at room temperature for a long time, and the plasticity of the product was well formed It is easy to mold the workpiece and it can be stored for a long time.

However, the coarse rubber clay prepared in Comparative Example 1 was not hardened at all at room temperature for a long time, and the plasticity was so low that the workpiece was distorted even if the workpiece was molded, and the coarse rubber The clay was not made and the workpiece could not be manufactured because the product was not made.

Table 2 below shows the change in plasticity with time of the plasticity clay produced by Example 1 and the plasticity of other products.

<Table 2>

As can be seen from the above Table 2, although there may be some errors in the measurement of the cohesive rubber clay according to the present invention, even if it is left at room temperature for a long time, there is no large change in plasticity, In case of Company A, the degree of plasticity was improved as time passed, and cracking occurred on the surface when it passed for more than 1 day. In case of Company B, plasticity increased with time, The surface is hardened like a sponge and the work is impossible. In the case of the product C, since the plasticity is high from the beginning, infants and children are very unsuitable for making the workpiece.

Meanwhile, it is possible to make a rubber clay paste in which the color is changed by reacting with ultraviolet rays by controlling the content ratio of the color pigment and the visual photographic material which are essentially mixed in the cohesive rubber clay according to the present invention. That is, as shown in FIG. 2, the cohesive rubber clay according to the present invention, in which the red light photocatalyst is mixed, maintains its own color at normal times, and when the ultraviolet light is directly irradiated, the irradiated portion (heart portion) In addition, the cohesive rubber clay according to the present invention, in which the bluish photocatalyst is mixed, maintains its own hue at normal times, and when the ultraviolet light is directly irradiated, the irradiated portion (heart portion) changes to blue color. In the coagulated rubber clay according to the present invention in which the photocatalyst is mixed, if the ultraviolet irradiation is not continuously performed, the color returns to the initial color. Accordingly, if the workpiece is made of the cohesive rubber clay according to the present invention, the color of the workpiece may be varied depending on whether the ultraviolet ray is irradiated or not, so that curiosity and creativity / creativity can be more effectively induced in children or infants.

In addition, as described above in the co-operation rubber clay of the present invention as described above, in addition to the essential composition, the antimicrobial agent 6 can be additionally mixed to suppress the propagation of bacteria, and the luminous agent 7 is mixed with the luminous It is a matter of course that the function can be given.

1. Silicon Base
2. Plasticity regulator
3. Antioxidant
4 .. Color pigments
5.
6. Antimicrobial agents
7 .. Luminescent agent

Claims (3)

In an artificial rubber clay made of an inorganic compound so that it can be repeatedly used for work, and is discolored in response to ultraviolet rays,
Said cooper rubber clay comprising;
A gel state silicone base which is 60 to 80% of the total weight of the rubber clay and is composed of a mixture of siloxane and silicon, dimethyl, methyl vinyl and vinyl group-terminated;
15 to 30% based on the total weight of the rubber clay; a plasticity modifier for adjusting the hardness of the silica-based powder system;
An antioxidant of oil type which is composed of 1 to 5% based on the weight of the whole rubber clay and is composed of a polydimethylsiloxane system to prevent solidification;
A color pigment provided at 1 to 3% based on the total weight of the rubber clay and for producing a color;
0.01 to 3% based on the total weight of the clay clay, reversible color photographic material which changes color from colorless to colored in response to ultraviolet rays and returns from color to colorless when ultraviolet ray is eliminated; By weight based on the total weight of the clay. The method according to claim 1,
Said cooper rubber clay comprising;
0.1 to 1% based on the total weight of the rubber clay, and an antimicrobial agent for preventing bacterial growth; By weight of the total weight of the clay. The method according to claim 1,
Said cooper rubber clay comprising;
1 to 10% of a phosphorescent agent based on the total weight of the rubber clay; By weight of the total weight of the clay.

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