KR20180094832A - Multi-functional clay composition - Google Patents

Abstract

The present invention relates to a multifunctional clay composition which can be used as clay capable of various craft works before drying and can be used as a writing instrument similar to crayons, Crapas, or colored pencils after drying and a method for manufacturing the same. The multifunctional clay composition comprises: a constitution material; a binder; a polyfunctional crosslinking agent containing a compound having a bifunctional or more hydroxyl group or forming an ion having a bifunctional or more hydroxyl group in a water solvent; wax; and pigments.

Description

Multifunctional clay composition {MULTI-FUNCTIONAL CLAY COMPOSITION}

The present invention relates to a multifunctional clay composition which can be used as a clay capable of various workings before drying and can be used as a writing instrument similar to crayons, crayons or colored pencils after drying and a method for producing the same.

BACKGROUND ART [0002] Compositions for clay used in children's toys and the like are widely used and sold since various forms can be molded from the past. Recently, a composition for clay with various colors added is sold in the form of a toy set, etc. Such a toy set including a clay composition includes a plurality of clay compositions having various colors, And a simple forming tool such as a spatula are sold.

However, in the case of such a toy set type clay composition, after being dried for a certain period of time, it is impossible to further mold the composition, and the lifespan of the toy or the like is shortened. That is, after the clay composition is dried, the molding itself becomes difficult, the lifetime of the clay composition is relatively short, and the clay composition has a different function or can not be used for other purposes.

Particularly, since the clay composition is mainly provided in the form of a toy or the like used by children, it is necessary to include relatively expensive components that are harmless to the human body, so that the manufacturing and selling unit costs are relatively high. Despite such a high unit price, since the life span is relatively short and it can not have other functions or uses, it has been a considerable burden on consumers.

Due to the problems of the prior art, it has been considered to develop a composition having a longer lifetime or having a different function or being used for other purposes even after the lifetime as a moldable clay composition has been exhausted. However, It is true that there was a limit.

Accordingly, the present invention provides a multifunctional clay composition which can be used as a clay capable of various workings before drying and can be used as a writing instrument similar to crayons, crayons or colored pencils after drying and a method for producing the same.

The present invention relates to a composition comprising a body material;

A binder comprising a crosslinkable water-soluble resin or compound;

A polyfunctional crosslinking agent containing a compound having a bifunctional or more hydroxyl group or forming an ion having a bifunctional or more hydroxyl group in a water solvent;

Wax; And

Comprising a pigment,

The pigment provides from 0.5 to 6% by weight, based on the total composition, of a multifunctional clay composition.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a multifunctional clay composition according to a specific embodiment of the present invention and a method for producing the same will be described in detail. It is to be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

In addition, throughout this specification, "comprising" or "containing ", unless specifically stated, refers to including any and all components (or components) Can not be interpreted as excluding.

According to an embodiment of the present invention, a sieving material (body material);

A binder comprising a crosslinkable water-soluble resin or compound;

A polyfunctional crosslinking agent containing a compound having a bifunctional or more hydroxyl group or forming an ion having a bifunctional or more hydroxyl group in a water solvent;

Wax; And

Comprising a pigment,

The pigment is present in an amount of 0.5 to 6% by weight, based on the total composition, of a multifunctional clay composition.

The present inventors have continued research to extend the practical lifetime by imparting different functions or uses to the moldable clay composition in various forms. As a result of these studies, it has been found that the inclusion of a crosslinkable water-soluble binder and a specific polyfunctional crosslinking agent, wax, pigment and the like makes it possible to provide a multifunctional clay composition which can be used as a writing instrument similar to crayons, And the present invention has been completed.

More specifically, such a clay composition can be molded into various forms and can be used as a toy or the like, as it has a degree of deformation exceeding a certain level, as in the case of a conventional clay composition, before drying containing a certain amount of moisture. Such a multifunctional clay composition may have a penetrability, for example, as determined by PENETROMETER at room temperature and 36% relative humidity of 50 to 300, or 100 to 200, or 105 to 180, or 110 to 160 , Which corresponds to a degree of penetration (penetration) that is comparable to or slightly lower than that of conventional clay compositions. Therefore, the clay composition of one embodiment can be molded into various forms in the same manner as the conventional clay composition before the drying.

On the other hand, the clay composition of the embodiment can have high hardness, strength and abrasion resistance (low friction coefficient), etc., compared to conventional clay compositions after drying for a certain period of time or more. More specifically, the multifunctional clay composition of this embodiment can have abrasion resistance, for example, defined as a coefficient of friction of 0.35 or less, or 0.25 or less, or 0.2 to 0.25 after drying at room temperature for 7 days, Etc. correspond to the physical properties of conventional writing instruments such as crayons and crayons. As such, the clay composition of one embodiment has relatively high hardness and abrasion after drying, while the composition of one embodiment contains a pigment of various colors, so that the composition of one embodiment is once dried to form The pigment or the like may be buried in the paper or the like from the clay composition due to abrasion, so that it can be used as a writing instrument similar to crayons or crayons.

As a result, the multifunctional clay composition of one embodiment exhibits versatility that can be utilized as a writing implement even after a substantial lifetime as a moldable clay composition, exhibits a substantially extended life span, In addition, the actual burden of consumers considering product unit price can be greatly reduced.

Hereinafter, each component of the multifunctional clay composition of one embodiment will be described in more detail.

The clay composition of one embodiment comprises a basic sieving agent. Such sieving agents can be made into a major component in the clay composition of one embodiment, which occupies the largest amount together with the binder described below. As such sieving agents are included, the clay compositions of one embodiment can be molded into various forms as well as various previously known clay compositions prior to drying.

As such a sieving agent, any component known to be usable in a previously formable clay composition can be used without any limitation, and specific examples thereof include clay-based sieving agents such as kaolin-based clay, talc, mica, calcium carbonate ₃ ) or magnesium carbonate (MgCO ₃ ). However, kaolin clay, calcium carbonate, or the like may be suitably used in order to have proper physical properties as a formable clay composition of the clay composition of one embodiment, or suitable physical properties similar to writing instruments after drying.

The kaolin-based clay is a clay component derived from kaolin minerals that can be naturally collected, and may contain a composite oxide of aluminosilicate as a main component. Such kaolin-based clay may be manufactured by a well known method, or commercially available.

In addition, other types of clay-based sieving agents or inorganic sieving agents are also known to be usable in clay compositions and can be manufactured and used commercially or by a person skilled in the art.

On the other hand, the multifunctional clay composition according to one embodiment of the present invention includes, as a main component, a binder including a crosslinkable water-soluble resin or compound together with the clay based sieving agent. Such binders are included as a component of the clay composition and can be cross-linked with the polyfunctional cross-linking agent described below to ensure that the clay composition has an appropriate level of freeness and viscosity. For example, the binder may include a crosslinkable functional group (for example, a hydroxyl group or the like) contained therein, which is crosslinked through a hydroxyl group of a polyfunctional crosslinking agent to form a crosslinked structure. As a result, the clay composition contains a plurality of water soluble polymer chains May comprise cross-linked polymers of the cross-linked type. Thus, the clay composition can have an appropriate level of toughness or viscosity and can be used as a clay composition that can be molded into a water-soaked form.

Also, after the clay composition has been used and dried for a period of time, an appropriate level of moisture is evaporated and removed from the clay composition of one embodiment, and the clay composition of one embodiment has a high level of hardness and abrasion . For this reason, the pigment and the like contained in the composition of one embodiment can be buried onto the paper or the like from the clay composition by abrasion, and therefore can be used as a writing instrument similar to crayons, crayons, and the like.

On the other hand, the binder may be a cellulose-based polymer previously known to be usable in a clay composition or the like, or any water-soluble resin or compound having a cross-linkable functional group such as a hydroxy group or a (meth) acrylate group. All are available. Specific examples of the cellulose-based polymer include alkylcelluloses such as methylcellulose and ethylcellulose, carboxyalkylcelluloses such as carboxymethylcellulose, and hydroxyalkylcelluloses such as hydroxymethylpropylcellulose. In addition, various cellulose-based polymers It goes without saying that the polymer can be used as a binder. Of these, methylcellulose can be suitably used in consideration of the tearing of the clay composition before drying, the moldability, compatibility with other components, and the like. Further, typical examples of the water-soluble resin or compound having a crosslinkable functional group include polyvinyl alcohol (PVA) -based polymers, and various water-soluble resins, polymers, or compounds having a hydroxyl group or the like can be used without any limitation Of course it is.

In particular, a polyvinyl alcohol (PVA) -based polymer may be suitably used as the binder so that the binder can form an appropriate cross-linking structure with the polyfunctional cross-linking agent to have an appropriate level of viscosity or tear.

On the other hand, the clay composition of one embodiment includes, in addition to the above-mentioned main components, a predetermined multifunctional crosslinking agent. Such a polyfunctional crosslinking agent is a compound containing a bifunctional or more hydroxyl group in a molecular structure so as to form a crosslinking structure with the above-mentioned binder, or a salt or a compound in the form of a complex, in which the ion having a bifunctional or more hydroxyl group Can be formed.

More specifically, the polyfunctional crosslinking agent may be a compound such as boric acid (B (OH) ₃ ) having a bifunctional or more hydroxyl functional group bonded to it, or a borate-based ion A borate-based salt compound or a complex or the like. More specific examples of the borate-based salt compound or complex include compounds represented by the formula Na ₂ B ₄ O ₅ (OH) ₄揃 8H ₂ O or Na ₂ B ₄ O ₇揃 10H ₂ O and ionized to form tetrahydroxyborate A borate mineral such as BORAX capable of forming an ion or the like, or a borosilicate compound.

It is needless to say that various polyfunctional crosslinking agents having a bifunctional or more hydroxyl group may be used in order to form a proper crosslinked structure with the binder and the like so that the clay composition can have an appropriate level of viscosity,

On the other hand, the clay composition of one embodiment includes wax as a component for increasing the basic compatibility between the components, the point / adhesive property of the composition, or the concentration of the solid content after drying of the clay composition to exhibit appropriate hardness and abrasion. Such waxes may be any wax commonly used in clay compositions, but in a suitable example, microcrystalline wax, paraffin wax, liquid paraffin, petrolatum, bees wax, wool wax, At least one wax selected from the group consisting of wool wax, carnauba wax, candelilla wax, PE wax, PP wax and synthetic wax may be used. According to one example of the wax, it is of course possible to use a wax composition comprising two or more kinds of waxes selected from these, and a selective additive.

In addition, the clay composition of one embodiment includes a pigment so as to be able to be applied as a writing tool of various colors in a dried state while exhibiting various colors by itself. These pigments can be used without any limitation, including extender pigments or coloring agents known to be usable for writing instruments such as crayons.

Specific examples of such extender pigments or colorants include carbon black as a black pigment, iron oxide or permanent red 4R as a red pigment, zinc sulfur or cadmium yellow as a yellow pigment, molybdenum orange or cadmium orange as an orange pigment, And various other extender pigments or coloring agents can be used.

In one embodiment, the clay composition comprises each of the components described above in an amount of from 10 to 50% by weight, based on the total weight of solids of the clay composition, of the constituent (s); From 3 to 40% by weight of the binder; 0.05 to 10% by weight of the polyfunctional crosslinking agent; 1 to 30% by weight of the wax; And 0.5 to 6% by weight of the pigment. According to the content range of each of these components, the clay composition before drying exhibits a proper shape and can be molded into various forms, and after being dried for a certain period of time, it exhibits high hardness, abrasion resistance, It can be suitably used as a writing instrument.

The clay composition according to one embodiment of the present invention is used to dissolve or disperse each of the components described above during the production process and further includes a water solvent such as water as a liquid medium used for controlling proper tearing or viscosity of the clay composition during use can do. Such a water-soluble medium can be easily determined by those skilled in the art so that the components can be appropriately dissolved / dispersed in the course of production or use, and the clay composition can be appropriately torn or the like.

On the other hand, the clay composition of one embodiment may further include additives such as a moisturizing agent such as glycerin or propylene glycol, a preservative, a lubricant such as calcium stearate or sodium stearate, in addition to the above-mentioned components.

Such additives may be included in customary proportions depending on the specific composition of the clay composition. For example, the humectant may be contained in an amount of 1 to 10% by weight based on the total composition, the preservative may be contained in an amount of 0.001 to 0.5% by weight, and the lubricant may be contained in an amount of 1 to 20% by weight.

The clay composition of one embodiment described above can be obtained by mixing each component such as a sieving agent, a binder, a polyfunctional crosslinking agent, a wax and a pigment in the presence of a liquid medium such as a water solvent, And further mixing and kneading. In a more specific example, after forming the aqueous solution of the binder and the polyfunctional crosslinking agent, the aqueous solution and the remaining components may be firstly mixed in a blender, and the first mixture may be mixed in a Bowl mixer, Lt; / RTI > for 10 to 60 minutes.

The multifunctional clay composition of the above-described embodiment has a comparable range to that of existing clay compositions at the time of initial use, and thus can be suitably used as a clay composition that can be molded into various forms, and has high strength and hardness after being used for a certain period of time and dried It can be used as a writing instrument similar to crayons and the like, so that it can have a multifunctional and versatile function which is not known in the prior art.

As described above, the present invention can be suitably used as a clay composition which can be molded into various forms as it has a similar roughness to that of existing clay compositions, but also has high hardness and abrasion after being used for a certain period of time, It can be used as a similar writing instrument and can have a multifunctional and versatile function which has not been known in the past.

That is, even after completing the substantial lifetime of the clay composition, it exhibits versatility that can be used as a writing instrument. Therefore, it has a substantially extended life span, and can provide a variety of fun to children as a major consumer, Considerable burden on consumers can also be greatly reduced.

Hereinafter, the present invention will be described in more detail with reference to the following examples. However, the scope of the present invention is not limited to the following examples.

Examples 1 to 3: Preparation of multifunctional clay composition

Using the compositions shown in the following Table 1, the multifunctional clay compositions of Examples 1 to 3 were prepared by the following method.

First, a 20 wt% aqueous solution of polyvinyl alcohol (available from (gl-05 / Goshenol) and a 4 wt% aqueous solution of borax (available from Borax / Duksan) was prepared. 25 ml of the polyvinyl alcohol aqueous solution , 4 ml of a borax aqueous solution and the other components listed in Table 1 were put into a blender and mixed at 600 rpm for 10 minutes.

These mixtures were put into a Bowl mixer and kneaded at a temperature of 60 DEG C for 20 minutes to prepare the clay compositions of Examples 1 to 3.

Example 1 Example 2 Example 3 Constitution agent Kaolin clay 30 wt% 30% by weight of calcium carbonate
(Available from Oreworld) Kaolin clay 30 wt% Binder-1
Ethyl cellulose
10 wt%
(Available from: HECELLOSE / Lotte Chemical) 10% by weight of ethyl cellulose
(Available from: HECELLOSE / Lotte Chemical) 10% by weight of carboxymethylcellulose,
(Available from: Michel / Zell-Chem) Binder-2 PVA aqueous solution 30 wt%
(Available from gl-05 / Goseono) PVA aqueous solution 30 wt%
(Available from gl-05 / Goseono) PVA aqueous solution 30 wt%
(Available from gl-05 / Goseono) Wax Microcrystalline wax
6 wt%
(Available from DONA /
South East Petrochemical) Microcrystalline wax
6 wt%
(Available from DONA /
South East Petrochemical) Microcrystalline wax
6 wt%
(Available from DONA /
South East Petrochemical) Calcium stearate 5.8 wt%
(Available from: Danseok Industry) 5.8 wt%
(Available from: Danseok Industry) 5.8 wt%
(Available from: Danseok Industry) Borex solution 4 wt%
(Available from Borax / Duksan) 4 wt%
(Available from Borax / Deoksan) 4 wt%
(Available from Borax / Deoksan) Pigment 6 wt%
(Available from Yellow 2GS /
Woo Sung Chemical) 6 wt%
(Available from Yellow 2GS /
Woo Sung Chemical) 6 wt%
(Available from Yellow 2GS /
Woo Sung Chemical) Propylene glycol 4 wt% 4 wt% 4 wt% glycerin 4 wt% 4 wt% 4 wt% antiseptic 0.2 wt% 0.2 wt% 0.2 wt% Sum 100 wt% 100 wt% 100 wt%

Comparative Example 1: Conventional Clay Composition Existing clay composition of a clay product manufactured by Play doh was used as Comparative Example 1.

Comparative Example 2: Conventional curing composition

The existing crayons of the yellow chick products manufactured by Dong-A Co., Ltd. were compared as Comparative Example 2.

The penetration of the compositions of Examples 1 to 3 and Comparative Examples 1 and 2 and the bending strength after drying were measured by the following methods, and the results of the measurements are summarized together in Table 2 below.

Intrusion level:

Test equipment: Penetrometer (J.I.S)

Test conditions: Each composition sample was placed in a test equipment container at room temperature (about 22 ° C) and at a relative humidity of 36%, and the depth was measured by measuring the depth of penetration for a certain period of time after the weight was vertically penetrated. The higher the measurement result in the penetration test equipment, the higher the penetration and the higher the penetration.

Bending strength:

Test equipment: Small table tester (EZ-s)

Test conditions and methods:

First, each composition sample was prepared as a bar type specimen having a length of 50 mm, a width of 10 mm, and a thickness of 4 mm. The prepared specimens were dried at room temperature (about 22 ° C) for 7 days.

The dried specimens were subjected to a bending test under the conditions of a load rate of 40 mm / min and a three-point bending method (distance between points: 30 mm) in the test equipment, and the bending strength was measured. The measurement results are expressed in units of load.

The bending strength was measured and evaluated by the average value of the bending strength measured five times by the above method.

Coefficient of friction

For the same dry specimen measuring the bending strength, the coefficient of friction (wear resistance) was measured under the following equipment / conditions.

Test Equipment: Universal Testing Machine

Test speed: 150 mm / min

Load cell: 30N

Average section: 30 ~ 120mm

Vertical load: 500g

Braking materials: Paper

Requested by Korea Polymer Research Institute.

Physical property measurement result Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Intrusion 118 115 150 203 0 Bending strength after drying (gf) 1845gf 1755gf 1820gf 1056gf Extremely hard to measure intrusion Coefficient of friction 0.24 0.23 0.25 0.4 0.25

Referring to the above Table 2, Examples 1 to 3 show the penetration (roughness) comparable to that of the clay composition of Comparative Example 1 before drying, and the abrasion resistance (low friction coefficient) of the crayon of Comparative Example 2 after drying . In contrast, in Comparative Example 1, since the abrasiveness after drying was too low (the coefficient of friction was too high), it was confirmed that the pigment or the like could not be transferred to paper due to abrasion, Is too low to be used as a molding composition.

Claims (8)

A somatic material;
A binder comprising a crosslinkable water-soluble resin or compound;
A polyfunctional crosslinking agent containing a compound having a bifunctional or more hydroxyl group or forming an ion having a bifunctional or more hydroxyl group in a water solvent;
Wax; And
Comprising a pigment,
Wherein the pigment is present in an amount of 0.5 to 6% by weight based on the total composition.
The multifunctional clay composition according to claim 1, wherein the sieving material comprises at least one selected from the group consisting of kaolin clay, talc, calcium carbonate, magnesium carbonate and mica.
The multifunctional clay composition according to claim 1, wherein the binder comprises a cellulose-based polymer and a PVA-based polymer.
The multifunctional clay composition according to claim 1, wherein the multifunctional crosslinking agent comprises boric acid (B (OH) ₃ ), a borate compound or complex which forms a borate ion in a water solvent.
The multifunctional clay composition according to claim 1, further comprising at least one additive selected from the group consisting of a moisturizing agent, a preservative, a lubricant, and a water solvent.
The method of claim 1, wherein, based on the total weight of solids,
10 to 50% by weight of the body material;
From 3 to 40% by weight of the binder;
0.05 to 10% by weight of the polyfunctional crosslinking agent;
1 to 30% by weight of the wax; And
0.5 to 6% by weight of the pigment.
2. The multifunctional clay composition according to claim 1, wherein the penetration is 50 to 300 as measured by PENETROMETER at room temperature and 36% relative humidity.
The multifunctional clay composition according to claim 1, which exhibits a coefficient of friction of 0.35 or less on paper after drying at room temperature for 7 days.