JPH11246802A - Highly concealing liquid composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject composition having sufficient concealing activity, short in a coating film-drying time even in the case of thick coating film, and useful as a correction liquid, a paint for primer coating or the like by compounding a concealing material, an organic solvent and a specific binding material. SOLUTION: This composition is obtained by compounding (A) a concealing material of a rutile type titanium oxide or the like, (B) an organic solvent containing an organic solvent preferably having a boiling point of 40-80 deg.C such as cyclopentane in an amount 10-100 wt.% based on the whole solvent, and (C) a binding material soluble in the component B and consisting of an acrylic resin having a glass transition temperature of -30 deg.C to -70 deg.C preferably in an amount of 30-70 wt.% of the component A and 30-70 wt.% of the component B based on the total composition. The component C is obtained, for example, by polymerizing n-butyl methacrylate, lauryl methacrylate and 2-ethylhexyl methacrylate. The volume concentration of the pigment in the composition is preferably 40-75 wt.%.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a highly concealable liquid composition for forming a dried film having a high concealment property, such as a correction liquid or a primer paint, and more particularly, to a thick coating film drying method. The present invention relates to a highly concealable liquid composition having excellent properties.

[0002]

BACKGROUND OF THE INVENTION Highly concealable liquid compositions are used for concealing and correcting characters and designs, such as correction fluids and undercoat paints. The concealing is performed by the concealing material and the binder contained in the highly concealable liquid composition being fixed by evaporation of the solvent to form a dried coating film.

As a conventional technique, a correction fluid will be described as an example. The correction liquid is mainly composed of a concealing material, a solvent, and a binder soluble in the solvent. As the concealing material, a pigment having high concealing properties such as titanium oxide or zinc oxide is used. When concealing the handwriting of a water-based ink such as a fountain pen and a water-based sign pen, an organic solvent that does not dissolve the water-based ink, such as toluene, xylene, 1,1,1-trichloroethane, and trichloroethylene, is used as the solvent. When hiding handwriting with an oil-based ink such as an oil-based ballpoint pen or an oil-based marker, printing with a typewriter, or copying with a dry copying machine, water that does not dissolve the oil-based ink in a solvent is used. Further, in recent years, cyclohexane-based organic solvents such as cyclohexane, methylcyclohexane, and ethylcyclohexane, which have low solubility in oil-based inks, are used in order to eliminate the complexity of using different solvents depending on the type of handwriting. Here, by using a low-boiling solvent having a boiling point of 80 ° C. or less, a correction liquid having a short drying time for a thin coating film can be obtained. When using an organic solvent, an acrylic resin, a vinyl alkyl ether resin, a cyclized rubber,
A styrene-butadiene copolymer elastomer or the like is used, and when water is used, a (meth) acrylate ester resin emulsion, a styrene-butadiene copolymer resin emulsion, an ethylene vinyl acetate resin emulsion, or the like is used.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to shorten the time required for drying a thick coating film of a correction liquid. The correction operation using the correction liquid is performed in the following steps. (1) Apply the correction liquid to the erroneous portion. (2) Dry until the solvent in the correction liquid evaporates to allow writing on the correction liquid coating film. (3) Rewriting is performed on the dried coating film which conceals a mistake.
In order to perform the correction work in a short time, of the above steps,
It is important to shorten the time required for the coating to dry (coating drying time) until the solvent of (2) evaporates and writing on the coating becomes possible. In particular, in the correction operation using the correction liquid, the thickness of the coating film is often increased in order to conceal clerical errors with the coating film. Therefore, it is important to shorten the drying time of the thick coating film.
However, the coating film drying time accelerates as the coating film thickness increases, and it is necessary to wait a long time before writing on the dried coating film. The reason why the drying time of the thick coating film is extremely long is that the coating film covers the surface of the coating film and impedes the permeation of the solvent. Incidentally, the coating film referred to herein indicates a state in which the highly concealable liquid composition is applied to the surface to be coated, and a state in which the solvent is almost completely eliminated from the coating film is referred to as a dry coating film. Therefore, the coating film refers to a state containing a solvent. Then, in the process of transforming this coating film into a dried coating film, a state in which the amount of the solvent is smaller than that inside the coating film occurs on the surface of the coating film as the solvent evaporates. In the state where the amount of the solvent is small, although the fluidity is not exhibited as in the highly concealable liquid composition, the solvent is not completely dried as in the case of a dried coating film. In this case,
This intermediate state is called a film. In the process of transforming the coating into a dry coating, the solvent in the coating passes through the coating and evaporates. However, the permeability of the solvent decreases at an accelerated rate as the thickness of the film increases. Therefore, in the case of thick coating, the film formed before the coating film becomes a dried coating film becomes thick until the solvent hardly permeates, so that the coating film drying time becomes very long. On the other hand, when the thickness of the coating film is small, a film is formed on the surface of the coating film, but the thickness of the coating film is also small, so that the drying time of the coating film is short. In general,
In order to shorten the coating film drying time, as the solvent used,
It has been considered that a material having a high evaporation rate may be used. Certainly, when the coating thickness is as thin as less than 1 mm, the coating drying time is short. However, in the case of a thick coating film having a thickness of 1 mm or more, when a solvent having a high evaporation rate is used,
Since a large amount of solvent evaporates from the coating film surface, a film is easily formed. Furthermore, when the solvent permeating the film reaches the film surface, the solvent evaporates immediately from the film, so that the solvent in the film is small and the film is very dry. Such a very dry film has less movement of molecules in the film. Since the amount of solvent that permeates the film is proportional to the magnitude of the motion of the molecules, the amount of solvent that permeates a very dry film is small. As a result, the time for drying the thick coating film becomes longer. When a solvent having a low evaporation rate is used, the amount of the solvent evaporating from the surface of the coating film is small, so that a film is not easily formed. Further, when the solvent permeating the film reaches the surface of the film, the solvent slowly evaporates from the film, so that the film contains a large amount of the solvent being permeated. Such a film has a large molecular motion, so that the solvent easily permeates. However, the drying time is prolonged due to the slow evaporation of the solvent. Therefore, it has not been possible to obtain a correction liquid having a short drying time for the thick coating film.
As described above, in order to shorten the coating film drying time when the coating film thickness is large, it is necessary to form a coating film through which the solvent easily permeates. The present invention, even when the coating thickness is thick,
An object of the present invention is to provide a highly concealable liquid composition having a short coating film drying time.

[0005]

The present invention comprises at least a concealing material, an organic solvent, and a binder, wherein the binder is soluble in the organic solvent and has a glass transition point of -33 ° C to -7 ° C.
A high-concealment liquid composition characterized by being an acrylic resin at 0 ° C.

Hereinafter, the composition of the present invention will be described. As the concealing material, a pigment having a high concealing property such as titanium oxide or zinc oxide is used, and titanium oxide is particularly preferable. As the titanium oxide, titanium oxide such as rutile type and anatase type can be used.
SR-1, R-650, R-3L, A-11
0, A-150, R-5N, R-61N, R-
62N, R-42 (all manufactured by Sakai Chemical Industry Co., Ltd.), Titanics JRNC, JR-602, JR-80
5, JR-801, JR-300, JR-701
(Manufactured by Teica Co., Ltd.), Taipaque R-780, R-580, R-550, R-930, A-10
0, A-220, CR-58 (all manufactured by Ishihara Sangyo Co., Ltd.), Kronos KR-310, KR-380,
KR-480, KA-10, KA-20, KA
-30 (manufactured by Titanium Industry Co., Ltd.), Thai Pure R-
900 and R-931 (all manufactured by DuPont Japan Limited). These concealing materials can be used alone or in combination of two or more. The amount of the concealing material used is 30 to 30% based on the total amount of the high concealing liquid composition.
70% by weight is preferred.

[0007] The organic solvent is used for dissolving the binder, dispersing the concealing material, and fixing the binder and the concealing material by evaporation.
C), methylcyclopentane (same: 72C), methylcyclohexane (boiling point: 101C), and cycloparaffinic organic solvents such as ethylcyclohexane (same: 132C);
Normal hexane (same as above: 69 ° C.), isohexane (same as above:
(60 ° C.) normal octane (126 ° C.). In particular, the boiling point is 40 ° C to 80 ° C
10% to 100% by weight of organic solvent
It is preferable to use it because the drying time of the thick coating film and the drying time of the thin coating film can be further shortened. Incidentally, since an organic solvent having a boiling point of less than 40 ° C. is difficult to handle as a liquid, it is not preferable as a solvent for the highly concealable liquid composition. These organic solvents may be used alone or
More than one species can be used in combination. The amount of organic solvent used is
It is preferably 30 to 70% by weight of the entire high hiding liquid composition.

It is soluble in the above solvents and has a glass transition point of -33 ° C.
The acrylic resin having a temperature of -70 ° C is used for fixing the concealing material and the surface to be coated. The acrylic resin is a polymer resin containing a derivative of acrylic acid or methacrylic acid as a main component. In addition to the acrylic acid derivative and the methacrylic acid derivative, a copolymerizable monomer such as styrene or vinyltoluene is added. It also includes a copolymer resin as a component. The glass transition point is a temperature at which a polymer substance changes from a glassy state to a rubbery state. A resin having a lower glass transition point tends to have a larger steric hindrance such as a larger number of molecules of a main chain or a side chain of a polymer substance or a branch in a side chain. The glass transition point of the acrylic resin is calculated by Equation 1 from the glass transition temperature of the homopolymer of the acrylic resin monomer and the weight fraction thereof.

[0009]

(Equation 1)

Here, Tg is the glass transition point of the resin, and is calculated by converting to the absolute temperature. Tgi is the monomer i
Is the glass transition point of the homopolymer, and is calculated by converting to absolute temperature. Wi is the weight fraction of monomer i. n
Is the number of types of acrylic resin monomers to be constituted.
Acrylic resin monomers that can be used include methyl acrylate (glass transition point of homopolymer: 8 ° C), ethyl acrylate (-22 ° C), isopropyl acrylate (-5 ° C), and normal butyl acrylate (-:
54 ° C), 2-ethylhexyl acrylate (same as: -8
5 ° C.), methyl methacrylate (105 ° C.), ethyl methacrylate (65 ° C.), isopropyl methacrylate (81 ° C.), stearyl methacrylate (-100 ° C.), alkyl methacrylate (−)
62 ° C), 2-ethylhexyl methacrylate (same as:-
10 ° C.), normal butyl methacrylate (same as: 20
° C), isobutyl methacrylate (the same: 67 ° C), tributyl methacrylate (the same: 107 ° C), normal hexyl methacrylate (the same: -5 ° C), lauryl methacrylate (the same: -65 ° C), and the like. Other monomers copolymerizable therewith include styrene, vinyl toluene and the like. The glass transition point of the homopolymer is obtained by measuring a change in specific volume due to a temperature change, and is determined as a temperature at a change point at which the specific volume sharply increases. The acrylic resin having a glass transition point of −33 ° C. to −70 ° C. used in the present invention is obtained by mixing the acrylic resin monomer and other monomers copolymerizable with the acrylic resin monomer with the glass transition point of the above-described polymer substance. It can be obtained by appropriately selecting according to a calculation formula and conducting polymerization according to a standard method. When the Tg of the acrylic resin is −32 ° C. or higher, the object of the present invention cannot be achieved because the time for drying the thick coating film is long, and when the Tg of the acrylic resin is less than −70 ° C. The strength of the coating film is too weak to write. The amount of the acrylic resin having a glass transition point of −33 ° C. to −70 ° C. is more than the amount used in the entire high-concealment liquid composition.
The pigment volume concentration, which is the volume ratio between the resin and the pigment in the dried coating film, is more important. The pigment volume concentration is calculated by Equation 2.

[0011]

(Equation 2)

Here, PVC is the pigment volume concentration, Wi is the used weight of the concealing material, ρi is the density of the concealing material i, Wa is the used weight of the resin, ρa is the density of the resin, and n is the concealing material. Is the number of types.

The volume concentration of the pigment is preferably from 40 to 75%.
This is because when the pigment volume concentration is less than 40%, the dried coating film becomes sticky, and paper or the like superimposed on the dried coating film sticks, resulting in poor workability. Further, when the pigment volume concentration is 76% or more, the strength of the dried coating film is low, and when writing is performed, the dried coating film is peeled off from the coated surface and writing cannot be performed.

[0014] In addition to the above components, extenders such as aluminum silicate and calcium carbonate may be used in combination to improve the hiding power. It is also possible to further reduce the drying time by lowering the hardness of the film, and for this purpose, a liquid plasticizer such as methylacetyl ricinoleate, which has low solubility in resins and colorants, can be used in combination. it can. In addition, color pigments to match the color tone with the surface to be coated, dispersants and anti-settling agents for the dispersion stability of the pigments, flow improvers and leveling agents to further improve the coating performance, etc. And various additives can be appropriately added.

[0015]

When the high concealing liquid composition is thickly applied, the use of an acrylic resin having a glass transition point of -33 ° C to -70 ° C shortens the coating film drying time by the following effects. it is conceivable that. Glass transition point is -33 ° C-
The acrylic resin at 70 ° C. is an acrylic resin having a large steric hindrance such as a larger number of molecules in the side chain and a branch in the side chain as compared with an acrylic resin having a glass transition point of −32 ° C. or higher. Then, the correction liquid using such an acrylic resin forms a film having many voids. Therefore, the solvent in the coating film covered with the coating is evaporated through the voids in the coating. As described above, a coating film through which the solvent in the highly concealable liquid composition easily permeates can be formed. Particularly, an acrylic resin having a glass transition point of −33 ° C. to −70 ° C. and a boiling point of 40
The use of an organic solvent at a temperature of from 80 ° C. to 80 ° C. can shorten both the drying time of the thick coating film and the drying time of the thin coating film. In other words, since the amount of solvent evaporating from the coating film surface is large, the film is easy to be formed, but since the film has many voids, the solvent penetrates the film, so the drying time of the thick coating film is short, The correction liquid also has a short thin coating and drying time. Therefore, the high concealing liquid composition of the present invention has sufficient concealing properties, and the coating film drying time is short even when the coating thickness is large,
Correction work can be performed quickly.

[0016]

EXAMPLES Examples of the present invention will be described below using a correction fluid, but the present invention is not limited to the examples. The numerical values in Tables 1 and 2 indicate "parts by weight".

[0017]

[Table 1]

[0018]

[Table 2]

[0019]

[Table 3]

Production Examples 1 to 6 and Production Comparative Example 1
The production of acrylic resins Nos. 6 to 6 was performed as follows.
The substances shown in Tables 1 and 2 were charged into a 500 ml reaction vessel equipped with a stirrer, a nitrogen gas inlet, a thermometer, and a reflux condenser, and polymerized while stirring at 80 ° C. for 7 hours in a nitrogen gas stream. did.

Example 1 Titanics JR-800 (manufactured by Teica Co., Ltd., rutile type titanium) 36 parts by weight Methylcyclohexane (manufactured by Philips Sekiyu KK) 19 parts by weight Cyclopentane (manufactured by Maruzen Petrochemical Co., Ltd.) 20 Parts by weight Acrylic resin solution obtained by Production Example 1 16 parts by weight Mizukasil P-80 (fine silica, manufactured by Mizusawa Chemical Industry Co., Ltd.) 8 parts by weight Homogenol L-18 (Kao Corporation, dispersant) 9 parts by weight The above components were dispersed in a ball mill for 24 hours to obtain a correction liquid.

Example 2 Tytone R62N (rutile titanium manufactured by Sakai Chemical Co., Ltd.) 48 parts by weight Isohexane (manufactured by Maruzen Petrochemicals Co., Ltd.) 20 parts by weight Methylcyclohexane (manufactured by Philips Oil Co., Ltd.) 9 parts by weight Acrylic resin solution obtained in Example 2 13 parts by weight Mizukasil P-80 (described above) 8 parts by weight MA-100 (manufactured by Mitsubishi Kasei Kogyo Co., Ltd., carbon black) 0.05 parts by weight Homogenol L-18 (described above) 0.9 parts by weight The above components were prepared in the same manner as in Example 1 to obtain a correction fluid.

Example 3 Khronos KR-380N (rutile type titanium manufactured by Titanium Co., Ltd.) 36 parts by weight Cyclopentane (described above) 29 parts by weight Methylcyclohexane (described above) 10 parts by weight Acrylic resin obtained by Production Example 3 Resin solution 16 parts by weight Mizukasil P-80 (described above) 8 parts by weight MA-100 (described above) 0.04 parts by weight Homogenol L-18 (described above) 0.9 parts by weight The above components were modified in the same manner as in Example 1. A liquid was obtained.

Example 4 Titanics JR-300 (manufactured by Teica K.K., rutile type titanium) 48 parts by weight Cyclopentane (described above) 29 parts by weight Acrylic resin solution obtained in Production Example 4 13 parts by weight Mizukasil P- 80 (as described above) 8 parts by weight Homogenol L-18 (as described above) 0.9 parts by weight The above components were made in the same manner as in Example 1 to obtain a correction liquid.

Example 5 Titanics JR-800 (described above) 36 parts by weight Isohexane (described above) 39 parts by weight Acrylic resin solution obtained in Production Example 5 16 parts by weight Mizukasil P-80 (described above) 8 parts by weight MA- 100 (described above) 0.05 parts by weight Homogenol L-18 (described above) 0.9 parts by weight The above-mentioned components were made in the same manner as in Example 1 to obtain a correction liquid.

Example 6 Kronos KR-380N (described above) 48 parts by weight Cyclopentane (described above) 25 parts by weight Methylcyclohexane (described above) 4 parts by weight Acrylic resin solution obtained in Production Example 6 13 parts by weight MIZUKACIL P-80 (As described above) 8 parts by weight MA-100 (as described above) 0.05 parts by weight Homogenol L-18 (as described above) 0.9 parts by weight The above components were made in the same manner as in Example 1 to obtain a correction liquid.

Comparative Examples 1 to 6 In each of Examples 1 to 6, instead of the acrylic resin solutions of Production Examples 1 to 6, respectively, the acrylic resin solutions of Production Examples 1 to 6 of the acrylic resin were used. A correction fluid was obtained in the same manner as in Examples 1 to 6, except that the correction fluid was used.

Using the correction liquids obtained in Examples 1 to 6 and Comparative Examples 1 to 6, tests were performed on the drying time of the thin coating film, the drying time of the thick coating film, and the writing resistance. The test results are shown in Tables 4 and 5. Incidentally, Examples 1 to 6 and Comparative Examples 1 to 6
All of the correction liquids obtained by the above showed good hiding properties.

[0029]

[Table 4]

[0030]

[Table 5]

* 1 Thin coating film drying time: The above correction liquid was applied to a high quality paper using a 0.05 mm applicator, and a commercially available oil-based ballpoint pen (BK7, manufactured by Pentel Co., Ltd.) was used.
In 0), the time until writing on the coated portion was measured. * 2 Thick coating film drying time: 1 m of the above correction fluid on woodfree paper
m, and the time required for writing on the application portion with a commercially available oil-based ballpoint pen (BK70, manufactured by Pentel Co., Ltd.) was measured. * 3 Writing resistance: The above correction liquid is applied to a high-quality paper using a 0.05 mm applicator, and after the coating film is dried, it is written on a dry coating film with a commercially available oil-based ballpoint pen (BK70, manufactured by Pentel Co., Ltd.). Then, the state of the dried coating film was observed. ：: A state in which writing was performed normally without peeling of the dried coating film. ×: A state in which writing cannot be performed normally, such as the dried coating film being peeled off.

[0032]

As described in detail above, the highly concealable liquid composition of the present invention has a sufficient concealment property and is excellent in the drying property of the coating when the coating is thick. As a result, it has practically excellent quality as a correction fluid and a primer paint.

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[Procedure amendment]

[Submission date] March 4, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction contents]

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to shorten the time required for drying a thick coating film of a correction liquid. The correction operation using the correction liquid is performed in the following steps. (1) Apply the correction liquid to the erroneous portion. (2) Dry until the solvent in the correction liquid evaporates to allow writing on the correction liquid coating film. (3) Rewriting is performed on the dried coating film which conceals a mistake. In order to perform the correction work in a short time, of the above steps,
It is important to shorten the time required for the coating to dry (coating drying time) until the solvent of (2) evaporates and writing on the coating becomes possible. In particular, in the correction operation using the correction liquid, the thickness of the coating film is often increased in order to conceal clerical errors with the coating film. Therefore, it is important to shorten the drying time of the thick coating film.
However, the coating film drying time accelerates as the coating film thickness increases, and it is necessary to wait a long time before writing on the dried coating film. The reason why the drying time of the thick coating film is extremely long is that the coating film covers the surface of the coating film and impedes the permeation of the solvent. In this connection, the coating film referred to herein indicates a state in which the highly concealable liquid composition has been applied to the surface to be coated, and a state in which the solvent has completely disappeared from the coating film is referred to as a dry coating film. Therefore, the coating film refers to a state containing a solvent. Then, in the process of transforming this coating film into a dried coating film, a state in which the amount of the solvent is smaller than that inside the coating film occurs on the surface of the coating film as the solvent evaporates. In the state where the amount of the solvent is small, although the fluidity is not exhibited as in the highly concealable liquid composition, the solvent is not completely dried as in the case of a dried coating film. In this case, this intermediate state is called a film. In the process of transforming the coating into a dry coating, the solvent in the coating passes through the coating and evaporates. However, the permeability of the solvent decreases at an accelerated rate as the thickness of the film increases. Therefore, in the case of thick coating,
Since the film formed until the coating film becomes a dried coating film becomes thick until the solvent hardly permeates, the coating film drying time becomes very long. On the other hand, when the thickness of the coating film is small, a film is formed on the surface of the coating film, but the thickness of the coating film is also small, so that the drying time of the coating film is short. In general, it has been considered that a solvent having a high evaporation rate may be used as a solvent in order to shorten a coating film drying time.
Certainly, when the coating thickness is as thin as less than 1 mm, the coating drying time is short. However, in the case of a thick coating film having a thickness of 1 mm or more, when a solvent having a high evaporation rate is used, a large amount of the solvent evaporates from the coating film surface, so that a film is easily formed. Furthermore, when the solvent permeating the film reaches the film surface, the solvent evaporates immediately from the film, so that the solvent in the film is small and the film is very dry. Such a very dry film has less movement of molecules in the film.
Since the amount of solvent that permeates the film is proportional to the magnitude of the motion of the molecules, the amount of solvent that permeates a very dry film is small. As a result, the time for drying the thick coating film becomes longer.
When a solvent having a low evaporation rate is used, the amount of the solvent evaporating from the surface of the coating film is small, so that a film is not easily formed. Further, when the solvent permeating the film reaches the surface of the film, the solvent slowly evaporates from the film, so that the film contains a large amount of the solvent being permeated. Such a film has a large molecular motion, so that the solvent easily permeates. However, the drying time is prolonged due to the slow evaporation of the solvent. Therefore, it has not been possible to obtain a correction liquid having a short drying time for the thick coating film. As described above, in order to shorten the coating film drying time when the coating film thickness is large, it is necessary to form a coating film through which the solvent easily permeates. An object of the present invention is to provide a highly concealable liquid composition having a short coating film drying time even when the coating film thickness is large.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

[0007] The organic solvent is used for dissolving the binder, dispersing the concealing material, and fixing the binder and the concealing material by evaporation. Specifically, cyclopentane ( boiling point : 49) is used.
° C), methylcyclopentane (the same: 72 ° C), methylcyclohexane (the same : 101 ° C), ethylcyclohexane (the same: 132 ° C) and other cycloparaffinic organic solvents, normal hexane (the same: 69 ° C), isohexane (the same as above) : 6
0 ° C.) and paraffinic solvents such as normal octane (126 ° C.). In particular, it is preferable to use an organic solvent having a boiling point of 40 ° C. to 80 ° C. in an amount of 10% by weight to 100% by weight based on the total solvent, because the drying time of the thick coating film and the drying time of the thin coating film can be further reduced. . By the way,
Since organic solvents having a boiling point of less than 40 ° C. are difficult to handle as liquids, they are not preferred as solvents for highly concealable liquid compositions. These organic solvents can be used alone or in combination of two or more. The amount of the organic solvent to be used is preferably 30 to 70% by weight of the whole high concealment liquid composition.

Claims (1)

[Claims] 1. An acrylic resin containing at least a concealing material, an organic solvent, and a binder, wherein the binder is soluble in the organic solvent and has a glass transition point of −33 ° C. to −70 ° C. A highly concealable liquid composition comprising: