KR20210042839A - High performance desiccant with excellent durability and stability - Google Patents

Abstract

The present invention relates to a high-performance desiccant having excellent hygroscopicity and excellent release resistance at the same time, and a product including the same, and more specifically, to a high-performance desiccant having a high moisture absorption rate and excellent release resistance at the same time, and a product manufactured therefrom.

Description

High performance desiccant with excellent durability and stability {HIGH PERFORMANCE DESICCANT WITH EXCELLENT DURABILITY AND STABILITY}

The present invention is excellent in hygroscopicity and release resistance, and in particular, relates to a high-performance desiccant having a low heat of moisture absorption and moisture, and a product including the same. More specifically, the present invention relates to a high-performance desiccant and a product manufactured therefrom, which can prevent the content from flowing out of the product after moisture absorption, and has low heat of moisture absorption generated when moisture is absorbed.

The desiccant is incorporated into the container and used to absorb moisture in the container to maintain good storage conditions of objects in the container. In the past, silica gel has been widely used as a desiccant.Silica gel is manufactured by decomposing sodium silicate into strong acid, so manufacturing costs are high, and when discarded, it is not easily decayed, so it remains in nature and acidifies the soil, thereby causing serious environmental pollution. There were weaknesses caused.

In addition, in the case of a desiccant composed of only calcium chloride or magnesium chloride, which has strong hygroscopic power, it has strong hygroscopicity, but after moisture absorption, a liquid absorbent liquid may flow and cause a fatal problem to the objects inside the container.

In general, it is an industrial and electronic packaging specification, and a desiccant is added to the inside of a polystyrene box, and it causes deformation and damage of the polystyrene foam due to high heat generation when absorbed by calcium chloride and magnesium chloride. In addition, after gelation of the content of the desiccant due to moisture absorption, a phenomenon in which the content of the desiccant is transferred or eluted to the surface of the packaging material occurs due to high temperature and internal pressure, and the dissolution of the content causes corrosion of various materials such as metals.

Therefore, there is a need for a desiccant with a new function capable of controlling or improving the heat generation and dissolution of the content of the existing desiccant.

Korean Patent Registration No. 10-1825698 (2018.01.30)

An object of the present invention is to provide a desiccant having excellent absorption capacity and stability of gelled contents after moisture absorption.

In addition, the present invention provides a product that improves and minimizes the deformation and damage of packaging materials such as polystyrene foam by absorbing heat generated during moisture absorption with an internal material, and also improves and minimizes the problem that the contents are eluted on the surface of the packaging material after moisture absorption. There is a purpose to provide products that can be used.

In addition, an object of the present invention is to prevent a portion of a packaging paper and a container being damaged due to the expansion of the moisture absorbing agent due to moisture absorption.

In addition, an object of the present invention is to provide an electronic or industrial desiccant and a moisture-absorbing product using the same.

The present invention is any one or two or more hygroscopic substances selected from the group consisting of magnesium chloride and calcium chloride (A),

Any one or two or more first structural stabilizers (b-1) selected from starch and carboxymethylcellulose; And any one or two or more second structure stabilizers (b-2) selected from metal acrylic acid or a copolymer thereof and polyacryl amide or a copolymer thereof; Structural stabilizer (B),

Any one or two or more curable substances selected from kaolin, zeolite and bentonite (C) And

It provides a high-performance moisture absorbent comprising any one or two or more phase transfer agents (D) selected from the group consisting of polyethylene wax, polypropylene wax, polyamide wax, carnova wax, and polytetrafluoroethylene wax.

According to an aspect of the present invention, the high-performance moisture absorbing agent is based on 100 parts by weight of the moisture absorbing material (A), 1 to 100 parts by weight of the structural stabilizer (B), 1 to 40 parts by weight of the curable material (C), and the phase transfer agent. (D) 1 to 10 parts by weight may be included.

According to an aspect of the present invention, the structural stabilizer (B) may have a mixing ratio of the first structural stabilizer (b-1) and the second structural stabilizer (b-2) of 1: 0.3 to 1 weight ratio.

According to an aspect of the present invention, the hygroscopic material may have a mixing ratio of magnesium chloride and calcium chloride in a weight ratio of 2:1 to 5:1.

According to an aspect of the present invention, the high-performance moisture absorbent comprises any one or two or more reinforcing agents (E) selected from the group consisting of xanthan gum, locust bean gum, gum arabic, karaya gum, tragacanth gum, carob gum, and guar gum. It may contain more.

According to an aspect of the present invention, the high-performance desiccant may further include a solidifying agent (F).

According to an aspect of the present invention, the high-performance desiccant may further include a stabilizer (G).

According to an aspect of the present invention, the high-performance desiccant may have a moisture absorption rate of 350% or more and a release resistance of 90% or more.

The high-performance desiccant composed of one aspect of the present invention has a moisture absorption rate of 350% or more, and has a very high moisture absorption performance, and suppresses the release of moisture absorbed, thereby remarkably improving the release resistance.

In addition, the high-performance hygroscopic agent according to the present invention has excellent gelling properties, and thus the powdery form changes to a gel form after moisture absorption, thereby having excellent physical stability and durability.

In addition, there is no leakage of the moisture absorbing liquid from areas where there is a risk of content leakage, such as the sealing area of the packaging material, so it is possible to prevent damage caused by the moisture absorbing agent when storing important contents, and it is possible to prevent damage to the packaging material due to excessive expansion. There is an advantage that there is.

In addition, there is an advantage that it is suitable for use in packaging and containers of products sensitive to temperature by effectively blocking the heat of moisture absorption generated during moisture absorption from being radiated to the outside.

Hereinafter, the present invention will be described in more detail through specific examples or examples including the accompanying drawings. However, the following specific examples or examples are only one reference for describing the present invention in detail, and the present invention is not limited thereto, and may be implemented in various forms.

In addition, unless otherwise defined, all technical and scientific terms have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. The terms used in the description in the present invention are merely for effectively describing specific embodiments and are not intended to limit the present invention.

In addition, the singular form used in the specification and the appended claims may be intended to include the plural form unless otherwise indicated in the context.

In addition, when a part "includes" a certain component, it means that other components may be further included rather than excluding other components unless specifically stated to the contrary.

The present invention provides a high-performance desiccant having a high moisture absorption rate and at the same time a low release rate of a moisture absorption liquid,

One aspect of the present invention is any one or two or more hygroscopic substances selected from the group consisting of magnesium chloride and calcium chloride,

Any one or two or more first structural stabilizers (b-1) selected from starch and carboxymethylcellulose; And any one or two or more second structure stabilizers (b-2) selected from metal acrylic acid or a copolymer thereof and polyacryl amide or a copolymer thereof; Structural stabilizer (B),

Any one or two or more curable substances selected from kaolin, zeolite and bentonite (C) And

It is to provide a high-performance absorbent comprising any one or two or more phase transfer agents (D) selected from the group consisting of polyethylene wax, polypropylene wax, polyamide wax, carnova wax, and polytetrafluoroethylene wax.

The conventional desiccant composed of only components having strong moisture absorption has strong hygroscopicity, but there is a problem in that after moisture absorption, the liquid absorbent liquid flows out to the outer packaging and damages the contents to be preserved.

Accordingly, the present invention provides a high-performance desiccant that can solve the above problems. The high-performance desiccant of the present invention includes a moisture-absorbing material (A), a structural stabilizer (B), a curable material (C), and a phase change agent (D), and the high-performance desiccant of the present invention has a moisture absorption rate of 350%. The above has unexpectedly improved, and at the same time, it has an excellent release resistance of more than 90%.

In addition, the high-performance hygroscopic agent according to the present invention has excellent gelation properties in which the powder form changes to a gel form after moisture absorption, and thus has physical stability and excellent durability. Moreover, when the high-performance absorbent of the present invention is manufactured and used as a moisture-absorbing structure packaged with a breathable film, there is no outflow of the moisture absorbing liquid in areas where there is a risk of content leakage, such as the sealing area of the packaging material. As a result, the contents can be prevented from changing and the packaging material can be prevented from being damaged due to excessive expansion as the desiccant absorbs moisture.

In addition, when the high-performance moisture absorbent of the present invention is stored in a polystyrofoam box, it has excellent thermal stability and is not deformed, and if it has excellent elution stability, it provides a moisture absorbent having excellent gel stability.

According to an aspect of the present invention, the high-performance moisture absorbing agent is based on 100 parts by weight of the moisture absorbing material (A), 1 to 100 parts by weight of the structural stabilizer (B), 1 to 40 parts by weight of the curable material (C), and the phase transfer agent. (D) It may contain 1 to 10 parts by weight, and in the case of a high-performance desiccant, the moisture absorption rate can be remarkably increased, and the desiccant may have an advantageous effect of preventing the release of the moisture absorbed liquid as much as possible and having high gelation stability.

According to an aspect of the present invention, when the hygroscopic material is a mixture of magnesium chloride and calcium chloride, the weight ratio of magnesium chloride and calcium chloride may be 2:1 to 5:1, and the high-performance absorbent has the above ratio. When the material is included, the moisture absorption rate may be remarkably increased, and the moisture absorption agent may have an advantageous effect of preventing the moisture absorbed liquid from being discharged as much as possible and having high gelation stability.

As the moisture absorbent component, magnesium chloride and potassium chloride may be used alone or in combination. The hygroscopic material is not largely limited to the particle size, but may be 10 to 1,000 μm, preferably 50 to 800 μm, more preferably 100 to 600 μm. In the above range, when the contents are introduced into the packaging material during the manufacturing process, it is effective in preventing agglomeration or deterioration of flowability due to moisture absorption of the hygroscopic component.

According to an aspect of the present invention, the structural stabilizer (B) is any one or two or more structural stabilizers selected from the group consisting of a first structural stabilizer (b-1) and a second structural stabilizer (b-2). Can be

The second structural stabilizer (b-1) may be any one or two or more first structural stabilizers (b-1) selected from starch and carboxymethylcellulose, and the starch classification is not particularly limited, but, for example, , Modified starches such as starch, hydrolyzed starch, and cross-linked starch, and the cellulose-based compounds are carboxymethylcellulose (CMC), hydroxypropyl cellulose. , Ethyl cellulose, methyl cellulose, sodium carboxymethyl cellulose, and cellulose acetate. By including the starch and the cellulose compound in the above range, when the starch absorbs moisture, it is effective because the desired physical properties can be realized, but this is only a non-limiting example and is not limited to the numerical range.

In addition, the second structure stabilizer (b-2) is specifically, for example, sodium polyacrylate 2-propenate 2-propenamide polymer (SODIUM 2-PROPENOATE 2-PROPENAMIDE POLYMER), potassium polyacrylate (Potassium Examples include metal acrylic acids such as polyacrylate), polyacrylic acid, cross-linked polyacrylamide, sodium polyacrylic acid, sodium polyacrylate, or copolymers thereof and synthetic polymers such as polyacryl amide. However, it is not limited thereto. In the case of using the second structural stabilizer (b-2) of the above type, when the desiccant expands after moisture absorption, not only does the desiccant have a soft characteristic like a sponge, but also prevents the desiccant from being liquefied due to deliquescent properties after moisture absorption. It is effective in

In addition, the structural stabilizer (B) may include 1 to 100 parts by weight, preferably 10 to 80 parts by weight, and more preferably 15 to 60 parts by weight, based on 100 parts by weight of the hygroscopic material, but is not limited thereto. . When the structural stabilizer (B) in the above range is included, the moisture absorption rate and the release resistance are more excellent, and in particular, the stability of the high-performance moisture absorbent may be further increased.

According to an aspect of the present invention, the structural stabilizer (B) may have a mixing ratio of the first structural stabilizer (b-1) and the second structural stabilizer (b-2) in a weight ratio of 1: 0.3 to 1, preferably For example, the mixing ratio may be 1: 0.5 to 0.8 weight ratio, but is not limited thereto.

When mixed in the weight ratio, the release resistance and stability according to the moisture content of the high-performance absorbent are excellent.

In addition, the curable material (C) may employ a curable material having an average particle diameter of 1 to 500 μm, and preferably may include a mixture of a curable inorganic material having an average particle diameter of 10 to 300 μm. By including a curable material having an average particle diameter within the above range, it is possible to further improve hygroscopicity and release resistance, and is more effective in securing the stability of a hygroscopic product by reducing the expansion rate due to moisture absorption. The curable material (C) may contain 1 to 40 parts by weight, preferably 10 to 30 parts by weight, and more preferably 10 to 20 parts by weight based on 100 parts by weight of the moisture absorbing material, but is limited thereto. It is not. When the curable material is included in the above range, it is effective in suppressing separation by liquefaction of the desiccant due to deliquescent without deteriorating the moisture absorption performance, but this is only a non-limiting example, and is not limited to the numerical range.

The phase change agent (D) causes a lot of exothermic reaction when the moisture absorbent of the present invention absorbs moisture, so that the external polystyrene foam, which is a storage container, may be deformed by the heat, preventing this and preventing heat generation of the desiccant. It can be absorbed and converted into a phase to give a cooling effect. With such an increase in cooling effect, it is possible to prevent external contamination by suppressing the moisture content leaking to the outside of the permeable film packaged with the moisture absorbent as much as possible.

The phase transfer agent (D) may include 1 to 10 parts by weight, preferably 2 to 8 parts by weight, and more preferably 3 to 6 parts by weight, based on 100 parts by weight of the hygroscopic material, but is not limited thereto. In the content category, the moisture absorption rate is maintained to have excellent moisture absorption effect for a long period of time, and it is more preferable because it is excellent in dissolution stability, but is not limited thereto.

According to an aspect of the present invention, the reinforcing agent (E) is a high-performance absorbent, one or two or more selected from the group consisting of xanthan gum, locust bean gum, gum arabic, karaya gum, tragacanth gum, carob gum, and guar gum It may further include, and preferably may further include xanthan gum, locust bean gum, gum arabic and guar gum, but is not limited thereto.

In addition, the reinforcing agent may include 1 to 40 parts by weight, preferably 5 to 30 parts by weight, more preferably 10 to 25 parts by weight, based on 100 parts by weight of the hygroscopic material, but is not limited thereto. In the content category, the moisture absorption rate and release resistance are further increased, and the structure of the high-performance absorbent is not collapsed when the desiccant is liquefied due to deliquescent property after moisture absorption while suppressing excessive expansion due to moisture absorption.

In addition, the present invention includes a solidifying agent (F) including at least one selected from the group consisting of magnesium oxide and calcium oxide in order to prevent the desiccant from being liquefied by moisture after moisture absorption. In the case of magnesium oxide as the solidifying agent of the present invention, a commercial example may be used, such as STARMAG 50 from KONOSHIMA CHEMICAL. The solidifying agent is a very important constituent in the present invention as being cured as the desiccant absorbs moisture, thereby delaying or preventing the liquefaction of the desiccant.

The high-performance desiccant of the present invention may contain 1 to 20 parts by weight, preferably 2 to 15 parts by weight, and more preferably 3 to 10 parts by weight of the solidifying agent (F), based on 100 parts by weight of the moisture absorbing material. It is not limited. When the content of the solidifying agent (F) is in the above range, it is more preferred because it prevents liquefaction to inhibit phase separation of the desiccant, suppresses the separation of the deliquescent desiccant, and maintains the moisture absorption performance for a long period of time.

In addition, the desiccant of the present invention may further include a metal stearic acid as a stabilizer (G), and the metal stearic acid may be a _{compound in which an alkaline earth metal such as magnesium and calcium and a C 6} to C ₂₀ alkyl ester compound are combined, preferably It may be magnesium stearate, but is not limited thereto.

In addition, the high-performance desiccant may include 1 to 20 parts by weight, preferably 2 to 15 parts by weight, and more preferably 3 to 10 parts by weight of the stabilizer (G), based on 100 parts by weight of the moisture absorbing material, but is limited thereto. It is not.

It prevents solidification by the moisture absorption of the present invention, and by combining with the solvent resistant additive and the curable inorganic material of the present invention, solidification is prevented even when moisture is absorbed, and a continuous moisture absorption effect can be maintained.

As another aspect of the present invention, the high-performance moisture absorbent prepared according to the above aspect may be prepared as a high-performance moisture absorbing structure packaged with a breathable film. The high-performance desiccant may be granular or powdered, and the shape or size of the high-performance desiccant structure is not particularly limited, and an optimal design is possible if necessary. The breathable film may be Tyvek film or the like. Specifically, for example commercialized, Dupont, 1056D, etc. may be used, but the present invention is not limited thereto.

In addition, the high-performance moisture absorption structure is not particularly limited in shape or size of the breathable film, and can be optimally designed according to necessity. For example, two sheets of the above-described breathable film may be opposed, and a desiccant may be placed between the two sheets of the breathable film facing each other, and then sealed through heat-sealing, thereby manufacturing a product.

The breathable film is a polypropylene (PP, polypropylene) non-woven fabric, a high-density polyethylene (HDPE, high-density polyethylene) non-woven fabric, a high-density polyethylene (HDPE, high-density polyethylene) film, a low-density polyethylene (LDPE) non-woven fabric, low density. It may include at least one selected from the group consisting of polyethylene (LDPE, low-density polyethylene) film, polyethylene terephthalate (PET) nonwoven fabric, paper, and cloth.

Preferably, the packaging film of the breathable packaging material included in the high-performance moisture absorption structure of the present invention is a polypropylene (PP, polypropylene) non-woven fabric, a high-density polyethylene (HDPE, high-density polyethylene) non-woven fabric, and a high-density polyethylene (HDPE) film. , Low-density polyethylene (LDPE) non-woven fabric, low-density polyethylene (LDPE) film, polyethylene terephthalate (PET) non-woven fabric, including at least two selected from the group consisting of paper and cloth It may be in the form of laminated paper.

More preferably, the packaging film of the breathable packaging material included in the high-performance moisture absorption structure of the present invention is a high-density polyethylene (HDPE) nonwoven fabric, a high-density polyethylene (HDPE) film, and a low-density polyethylene (LDPE). ) It may be in the form of thermal lamination including at least two or more selected from the group consisting of a nonwoven fabric and a low-density polyethylene (LDPE) film. Accordingly, after thermally laminating the at least two selected materials, a perforation may be formed in the laminated material to manufacture a breathable packaging film.

By using the heat-laminated breathable packaging film, excellent heat resistance of the packaging material is secured, and excellent release resistance of the filled moisture absorbent of the present invention can be more stably maintained.

In the case of the high-density polyethylene nonwoven fabric, a commercially available example may be used, such as Tyvek of Dupont. The low-density polyethylene non-woven fabric may preferably be a linear low-density polyethylene (LLDPE, Linear low-density polyethylene) non-woven fabric, and the low-density polyethylene film may be preferably a linear low-density polyethylene (LLDPE, Linear low-density polyethylene) film.

As the high-performance desiccant contains the materials, it may have excellent moisture absorption and at the same time have excellent release resistance.

Specifically, the high-performance desiccant may have a moisture absorption rate of 350% or more and a release resistance of 90% or more, preferably a moisture absorption rate of 380% to 900%, and a release resistance of 95% or more, and more preferably, moisture absorption rate This may be 400% to 800%, and the release resistance may be 98% or more, but is not limited thereto.

In addition, the high-performance moisture absorbent has excellent thermal stability and stability, and is suitable for use as an electronic or industrial desiccant, and has an advantage that is particularly suitable for use in temperature-sensitive product packaging and containers.

Hereinafter, the present invention will be described in more detail based on Examples and Comparative Examples. However, the following Examples and Comparative Examples are only one example for describing the present invention in more detail, and the present invention is not limited by the following Examples and Comparative Examples.

[Method of measuring properties]

1. Moisture absorption rate: Moisture absorption was performed under constant temperature and humidity conditions of 40°C and 90% relative humidity until the weight change (based on 24 hours) was less than 0.5%, and the moisture absorption rate was calculated by the following equation by measuring the weight at the final moisture level.

Moisture absorption rate = (the weight of the final moisture-absorbing product-the weight of the first moisture-absorbing product) / the weight of the first moisture-absorbing product × 100

2. Stability: Product stability, such as phase separation, leakage, and packaging damage, of the content of the desiccant during the moisture absorption process was evaluated visually.

(If there is no phase separation of the contents, leakage of the contents, or damage to the packaging paper, the stability is excellent. ○ If any of them are marked as ×)

3. Release resistance: After the moisture absorption product is fully humid under the conditions of 40°C and 90% relative humidity, dry it in an oven at 50°C for 2 hours, and measure the moisture absorption rate after initial humidity and drying, respectively. By performing initial moisture absorption and then drying, the moisture absorption rate at the beginning and after drying is measured, and the release resistance is calculated by the following equation. For example, 90% release resistance means that 90% of moisture absorbed initially remains after drying.

Release resistance = moisture absorption rate after drying / initial moisture absorption rate × 100

4. Gel stability: After the hygroscopic product is fully moistened under the condition of 40℃ and 90% relative humidity, the degree of gelation is evaluated visually. At this time, if the contents are not gelled, X, if gelled, ○, and ◎ if the gel stability is very good.

5. Thermal deformation stability

After mounting a high-performance desiccant in a styrofoam container molded with a thickness of 3 ~ 6cm, after absorbing the moisture-absorbing product for 30 days in a thermo-hygrostat with 60°C and 90% relative humidity, the appearance deformation of the contacted styrofoam container is visually evaluated. .

○: If the surface of the styrofoam container in contact with the desiccant has not been deformed, it is indicated that the stability of thermal deformation is secured.

X: If the surface of the styrofoam container in contact with the desiccant is deformed, it is indicated that the thermal deformation stability is not secured.

The specifications of the desiccant material used in the following Examples and Comparative Examples are shown in Table 1 below.

[Examples 1 to 10]

After forming a mixed composition by uniformly mixing the composition as shown in Table 1 below, using a mixer, and then pulverizing the mixed composition with a grinder, 50 g of the powdered desiccant of Examples 1, 2, 3 and 4 were prepared.

Subsequently, two breathable films were used to face each other, and the moisture absorbent prepared in Examples 1, 2, 3 and 4 was added therebetween, and then processed at 120°C using a heat sealing machine to prepare a moisture absorbing product. . Tyvek film (Dupont, 1056D) was used as the breathable film, and the sealed portion of the packaging material was set to a length, 100 mm, and a width of 100 mm. The breathable film is a hot-melt coating solution [multi-kyung coating Co., Ltd.: acrylic latex adhesive (transparent cluster) 25% by weight, acrylic latex (resin) 8% by weight, hot melt adhesive including EVA 8% by weight, toluene 55% by weight, curing agent 4% by weight ] Was coated on Tyvek film and prepared in a dried double-layer structure (synthetic latex/ Tyvek: coating layer thickness of 5 μm). The physical properties of the high-performance moisture absorbing structure manufactured by the above method were measured, and the results are shown in Table 3 below.

[Comparative Examples 1 to 3]

In the same manner as in Example 1, except that the composition was changed as shown in Table 2 below, the physical properties of the prepared high-performance moisture absorbing structure were measured, and the results are shown in Table 3 below.

division Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 Example 10 MgCl ₂ 100 75 50 25 83 100 100 100 100 100 CaCl ₂ - 25 50 75 17 - - - - - 1st structural stabilizer 26 26 26 26 26 26 26 26 26 - Phase change now 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 Curable material 15 15 15 15 15 15 15 15 15 15 Second structural stabilizer 18 18 18 18 18 18 18 18 - 18 Reinforcement - - - - - 15 15 - 15 15 Solidifying agent - - - - - 5 - 5 5 5 stabilizator - - - - - 5 - 5 5 5

division Comparative Example 1 Comparative Example 2 Comparative Example 3 MgCl ₂ 100 100 100 CaCl ₂ - - - 1st structural stabilizer - 26 26 Phase change now 4.5 - 4.5 Curable material 15 15 - Second structural stabilizer - 18 18 Reinforcement - - - Solidifying agent - - - stabilizator - - -

MgCl ₂ : Aldrich, purity 94%, average particle diameter 250 ㎛

CaCl ₂ : Aldrich, purity 94%, average particle diameter 250 ㎛

1st Structural Stabilizer: Corn Starch, Daesang Co., Ltd.

Phase change agent: Polyethylene (PE) wax, SFC's LH1200, softening point 109±3℃

Curable material: Kaolin, Samjeon Chemical, 98% purity

Second Structural Stabilizer: Polyacrylamide-Sodium acrylate (Polyacrylamide-Sodium acrylate, molecular weight 50,000 g/mol, specific gravity 0.7)

Strengthener: Guar gum, Haji dossana gum

Solidifying agent: MgO, KONOSHIMA CHEMICAL, STARMAG 50, average particle diameter 30 ㎛

Stabilizer: Mg-stearate, Shinwon Chemical

Moisture absorption rate (%) Release resistance
(%) stability Gel stability Thermal stability Example 1 400 93.5 ○ ○ ○ Example 2 450 100.1 ○ ○ ○ Example 3 365 92.4 ○ ○ ○ Example 4 375 90.8 ○ ○ ○ Example 5 440 100.2 ○ ○ ○ Example 6 511 100.6 ○ ◎ ○ Example 7 430 100.5 ○ ◎ ○ Example 8 440 96.5 ○ ◎ ○ Example 9 430 100.3 ○ ○ ○ Example 10 410 98.3 ○ ○ ○ Comparative Example 1 82.9 52.1 X X X Comparative Example 2 72.4 65 X X X Comparative Example 3 134.8 49.2 X X X

As described above, in the present invention, it has been described by specific matters and limited embodiments and drawings, but this is only provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments, and the present invention is Those of ordinary skill in the relevant field can make various modifications and variations from these descriptions.

Therefore, the spirit of the present invention is limited to the described embodiments and should not be defined, and all things having equivalent or equivalent modifications to the claims as well as the claims to be described later belong to the scope of the inventive concept.

Claims (8)

Any one or two or more hygroscopic substances selected from the group consisting of magnesium chloride and calcium chloride (A),
Any one or two or more first structural stabilizers (b-1) selected from starch and carboxymethylcellulose; And any one or two or more second structure stabilizers (b-2) selected from metal acrylic acid or a copolymer thereof and polyacryl amide or a copolymer thereof; Structural stabilizer (B),
Any one or two or more curable substances selected from kaolin, zeolite and bentonite (C) And
Any one or two or more phase transfer agents selected from the group consisting of polyethylene wax, polypropylene wax, polyamide wax, carnova wax, and polytetrafluoroethylene wax (D)
High performance desiccant comprising a. The method of claim 1,
The high-performance desiccant is 1 to 100 parts by weight of the structural stabilizer (B), 1 to 40 parts by weight of the curable material (C), and 1 to 10 parts by weight of the phase change agent (D) based on 100 parts by weight of the moisture absorbing material (A). High performance desiccant comprising a. The method of claim 2,
The structural stabilizer (B) is a high-performance absorbent in which the mixing ratio of the first structural stabilizer (b-1) and the second structural stabilizer (b-2) is 1: 0.3 to 1 weight ratio. The method of claim 1,
The moisture absorbing material is a high-performance desiccant consisting of a mixing ratio of magnesium chloride and calcium chloride in a weight ratio of 2:1 to 5:1. The method of claim 1,
The high-performance desiccant further comprises any one or two or more reinforcing agents (E) selected from the group consisting of xanthan gum, locust bean gum, gum arabic, karaya gum, tragacanth gum, carob gum, and guar gum. The method of claim 1,
The high-performance desiccant further comprises a solidifying agent (F). The method of claim 1,
The high-performance desiccant is a high-performance desiccant that further comprises a stabilizer (G). The method of claim 1,
The high-performance desiccant is a high-performance desiccant having a moisture absorption rate of 350% or more and a release resistance of 90% or more.