Liquid composition

Abstract

To provide a liquid composition which is used for undercoating, can be used for a writing utensil, a stamp or the like, and can repel a water-based ink regardless of the surface shape of a coated surface, in a method for obtaining a painting by repelling the water-based ink when the water-based ink is overcoated on an undercoating part.MEANS FOR SOLVING THE PROBLEM: The liquid composition contains at least an organic solvent, a resin soluble in the organic solvent, and a surface conditioner, imparts hydrophobicity to a coated surface after drying, and is used for undercoating for overcoating with a water-based ink.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a liquid composition used as an undercoat for overcoating with water-based ink. Here, "undercoat for overcoating with water-based ink" refers to the creation of a picture on a flat surface with the intention of subsequently applying water-based ink. Furthermore, "picture" refers to a depiction of an object, a scene, a letter, a pattern, an intangible object, or a combination thereof. [Background technology]

[0002] A method has been known in the past to apply water-based ink to a picture made using a hydrophobic material and repel the water-based ink to obtain a picture. Non-Patent Document 1 describes a product in which a sketch is printed on a hydrophobic material and then coated with water-based ink, making the sketch appear to emerge. [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] Nouto Co., Ltd. Coloring Card Series (not a coloring book) [Searched June 4, 2024] Internet<URL:https: / / nouto.co / products / nuritakurie / > Summary of the Invention [Problem to be solved by the invention]

[0004] Non-Patent Document 1 has room for improvement in that it has a limited degree of freedom in design because it is printed with a predetermined picture, and there has been a demand for a liquid undercoat composition that would allow users to create their own pictures using a writing instrument or stamp, etc.

[0005] However, even when a hydrophobic liquid composition is used, the surface shape of the coating surface can affect the formation of depressions in the coating film, as shown in Figure 1. If a water-based ink is applied to such a surface, the applied water-based ink will accumulate in the depressions and will not be repelled well. As a result, there is the issue that the picture will not emerge, or even if it does emerge, it will be patchy. [Means for solving the problem]

[0006] The present invention solves the above-mentioned problems and provides a liquid undercoat composition that can be used for writing instruments or stamps, etc., that forms a uniform coating film regardless of the surface shape of the surface to be coated, and that is capable of repelling water-based ink.

[0007] In order to solve the above problems, the present invention provides a liquid composition used as an undercoat for overcoating with a water-based ink, which comprises at least an organic solvent, a resin soluble in the organic solvent, and a surface conditioner, and which imparts hydrophobicity to the coated surface after drying.

[0008] The amount of the surface conditioner to be blended is preferably 0.01% by weight or more and 5.0% by weight or less based on the total amount of the liquid composition.

[0009] The blending amount of the resin is preferably 20% by weight or more and 80% by weight or less based on the total amount of the liquid composition.

[0010] The liquid composition preferably contains a colorant of a similar color to the surface to be coated. The term "similar color" refers to a color whose hue is the same or similar in terms of the elements of "hue," "saturation," and "brightness" that make up a color. Here, "similar hues" means that the angle between the two hues on the color wheel is 90 degrees or less (preferably 45 degrees or less, and more preferably 30 degrees or less). [Effects of the Invention]

[0011] The liquid composition of the present invention contains at least an organic solvent, a resin soluble in the organic solvent, and a surface conditioner, and imparts hydrophobicity to the coated surface after drying, thereby enabling the formation of a flat coating film regardless of the surface shape of the coated surface.

[0012] When the blending amount of the surface conditioner is 0.01% by weight or more and 5.0% by weight or less relative to the total amount of the liquid composition, the coating film formed on the coating surface has stronger properties of repelling water-based ink.

[0013] By ensuring that the amount of resin is 20% by weight or more and 80% by weight or less relative to the total amount of the liquid composition, the resulting painting is less likely to be mottled when the water-based ink is applied, and a clearer painting can be obtained.

[0014] By further including a colorant of the same color as the surface to be coated, the created picture becomes difficult to see with the naked eye, and the user can be surprised to see the picture appear when the water-based ink is applied. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 2 is a schematic diagram showing the relationship between a liquid composition and the surface shape of a coating surface. [Figure 2] 1 is a schematic diagram of a coating film formed using a liquid composition of the present invention. [Figure 3] FIG. 3 is an enlarged image of the surface of the coating film shown in FIG. 2. [Figure 4] FIG. 1 is a schematic diagram of a coating film in which the blending amount of resin is less than 20% by weight. DETAILED DESCRIPTION OF THE INVENTION

[0016] The present invention will be described in detail below. The present invention relates to a liquid composition used as a base for applying aqueous ink, which contains at least an organic solvent, a resin soluble in the organic solvent, and a surface conditioner, and whose essential components are to impart hydrophobicity to the applied surface after drying.

[0017] The area where a liquid and a gas come into contact is generally called the surface, and the interactions between molecules present in the liquid cannot be received from the gas side at the surface, so the energy increases accordingly, and a force that tries to make the surface smaller, i.e., surface tension, comes into play.

[0018] Because surface conditioners are substances with weak intermolecular interactions, they act on the surface of the liquid to lower the surface energy and reduce the surface tension, resulting in the formation of a flat coating film as shown in Figure 2. This prevents the formation of depressions where the applied water-based ink can accumulate, allowing the water-based ink to be repelled regardless of the surface shape of the coating surface.

[0019] The surface conditioner that can be used in the present invention is not particularly limited, and examples thereof include acrylic-based compounds such as silicone-modified acrylic, polyether macromer-modified acrylate, and polyester-modified acrylate; silicone-based compounds such as polyether-modified polysiloxane, polyether-modified polydimethylsiloxane, polymethylalkylsiloxane, and polyester-modified polysiloxane; and fluorine-based compounds such as perfluoroacid ammonium salt, perfluoroalkylsulfonate, and polyoxyethylene perfluoroether. Of these, silicone-based and fluorine-based compounds are particularly preferred due to their excellent hydrophobic properties in their chemical structure, and examples of such compounds include BYK-300, BYK-302, BYK-306, BYK-307, BYK-310, BYK-313, BYK-315N, BYK-320, BYK-322, BYK-323, BYK-325, BYK-326, BYK-330, BYK-331, BYK-333, BYK-342, BYK-345, BYK-346, BYK-347, BYK-348, BYK-349, BYK- 350, BYK-354, BYK-355, BYK-356, BYK-358N, BYK-361N, BYK-370, BYK-375, BYK-377, BYK-378, BYK-381, BYK-392, BYK-394, BYK-399, BY K-3440, BYK-3441, BYK-3455, BYK-3550, BYK-3560, BYK-3565, BYK-3760, BYK-DYNWET800N, BYK-SILCLEAN3700, BYK-SILCLEAN3701, BY K-SILCLEAN3720, BYK-UV3500, BYK-UV3505, BY K-UV3510, BYK-UV3530, BYK-UV3535, BYK-UV357 0, BYK-UV3575, BYK-UV3576 (all manufactured by BYK Japan Co., Ltd.), Surflon S-211, Surflon S-221, Surflon S-231, Surflon S-232, Surflon S-233, Surflon S-241, Surflon S-242, Surflon S-242L, Surflon S-243, Surflon S-386, Surflon S-420, Surflon S-431, Surflon S-611, Surflon S-651, Surflon S-653, Surflon S-656 (all manufactured by AGC Seimi Chemical Co., Ltd.).

[0020] The amount of surface conditioner in the liquid composition of the present invention is preferably 0.01 wt % or more and 5.0 wt % or less based on the total amount of the liquid composition. This further enhances the water-based ink-repellent properties. It is unclear why this amount enhances the water-based ink-repellent properties, but as mentioned above, it is thought that this is because the action of the surface conditioner forms a flat coating film as shown in Figure 2, and the presence of a sufficient amount of surface conditioner in the liquid causes the surface conditioner to align on the surface of the coating film as shown in Figure 3, with the hydrophobic portions of the chemical structure lining up on the outside, further imparting hydrophobicity to the surface of the coating film.

[0021] The liquid composition of the present invention has the property of imparting hydrophobicity to a coated surface after drying. Methods for imparting hydrophobicity include the above-mentioned method of imparting hydrophobicity by varying the blending amount of a surface conditioner, and, for example, a method of leaving a hydrophobic resin or pigment remaining after the solvent in the liquid composition volatilizes after application.

[0022] The organic solvent that can be used in the liquid composition of the present invention is not particularly limited, and examples thereof include alcohols such as methanol, ethanol, propanol, and benzyl alcohol, aliphatic hydrocarbons such as hexane and octane, alicyclic hydrocarbons such as methylcyclohexane and dimethylcyclohexane, aromatic hydrocarbons such as benzene, toluene, and xylene, ketones such as methyl ethyl ketone and dimethyl ketone, esters such as methyl lactate, ethyl lactate, methyl acetate, ethyl acetate, and butyl benzoate, glycols such as ethylene glycol, propylene glycol, and dipropylene glycol, glycol ethers such as ethylene glycol monomethyl ether, ethylene glycol mono-2-ethylbutyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol monopropyl ether, propylene glycol monobutyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, dipropylene glycol monomethyl ether, and 3-methoxy-3-methyl-1-butanol, and glycol ether acetates such as ethylene glycol monomethyl ether acetate. These solvents may be used alone or in combination.

[0023] The liquid composition of the present invention preferably dries quickly to impart hydrophobicity to the coated surface after drying, and therefore, among the organic solvents described above, organic solvents with low boiling points such as alcohols, glycols, and glycol ethers are preferably used.

[0024] The resin that can be used in the liquid composition of the present invention may be any resin that is soluble in the organic solvent, and may include phenolic resins, alkylphenolic resins, terpene phenolic resins, petroleum resins, aliphatic resins, rosin resins, maleic acid resins, rosin-modified maleic acid resins, maleic acid-modified rosin resins, styrene-maleic acid resins, ketone resins, ketone aldehyde resins, butyral resins, fluororesins, etc. These resins may be used alone or in combination of two or more.

[0025] Of the resins listed above, alkylphenol resins, terpene phenol resins, and petroleum resins are particularly preferred for use in the liquid composition of the present invention. These resins are less susceptible to the influence of other substances, so there is no risk of them reacting with the composition in the applied water-based ink, further enhancing the stability of the coating film.

[0026] The amount of resin in the liquid composition of the present invention is preferably 20% by weight or more and 80% by weight or less based on the total weight of the liquid composition. This makes it possible to prevent the resulting painting from becoming patchy when the aqueous ink is applied, resulting in a clearer painting. If the amount of resin exceeds 80% by weight based on the total weight of the liquid composition, the viscosity of the entire liquid composition increases, which is undesirable as it affects the shape of the coating film.

[0027] The reason why a resin content of 20% to 80% by weight of the total liquid composition makes it less likely that the resulting painting will be patchy when water-based ink is applied is presumed to be as follows: Figure 4 shows an example of a coating film formed on a coating surface. In Figure 4, there are areas of the coating surface that are not covered, and when the water-based ink is applied, the ink will not be repelled in those areas, which could result in a patchy painting. If a sufficient amount of resin is added, the coating film will fully cover the coating surface, as shown in Figure 1, and the areas where the water-based ink is not repelled can be reduced.

[0028] Although the liquid composition of the present invention is effective even when it is colorless, it is preferable that it contains a colorant of a similar color to the surface to be coated. When the liquid composition is the same color as the surface to be coated, the created painting becomes difficult to see with the naked eye, and the user can be surprised when the painting appears when the water-based ink is applied.

[0029] "Similar colors" refers to colors that are identical or similar in terms of the elements of "hue," "saturation," and "brightness" that make up the color. Here, "similar hues" means that the angle between the two hues on the color wheel is 90 degrees or less (preferably 45 degrees or less, and more preferably 30 degrees or less). Examples of combinations in which the coating surface and colorant are similar colors include white paper and titanium oxide, and blue paper and copper phthalocyanine.

[0030] The colorant usable in the liquid composition of the present invention may be a dye soluble in the organic solvent or a pigment dispersible therein. Examples of organic pigments include azo pigments, phthalocyanine pigments, anthraquinone pigments, oxazine pigments, diketopyrrolopyrrole pigments, quinacridone pigments, threne pigments, isoindoline pigments, perylene pigments, and condensation pigments. Examples of inorganic pigments include metal oxides such as titanium oxide, iron oxide, and aluminum oxide, carbon black, mica, red iron oxide, barium sulfate, zinc oxide, cobalt, and aluminum powder. Examples of dyes include nigrosine pigments, azine pigments, monoazo pigments, disazo pigments, metal complex monoazo pigments, phthalocyanine pigments, anthraquinone pigments, and triarylmethane pigments. These colorants may be used alone or in combination.

[0031] When a pigment is used, a dispersant can be used in combination as needed. Examples of dispersants include silica, alumina, clay, talc, aluminum silicate, calcium carbonate, and aluminum hydroxide. These dispersants can be used alone or in combination.

[0032] The liquid composition of the present invention can contain viscosity modifiers such as ethyl cellulose and xanthan gum, surfactants such as polyglycerol fatty acid esters, and various other known additives, as long as they do not adversely affect the entire liquid composition and are compatible with it.

[0033] The liquid composition of the present invention can be used for writing implements, stamps, ink pads, ink-impregnated stamps, etc., and therefore allows the creation of any desired picture by applying an undercoat. By using it in a writing implement, the user can create the picture they desire, and by using it in a stamp or ink-impregnated stamp, etc., the same picture can be easily created any number of times, making it useful.

[0034] The liquid composition of the present invention imparts hydrophobicity to the coated surface after drying and repels water-based ink regardless of the surface shape of the coated surface, and therefore can be used in a wide range of fields.

[0035] There are no particular limitations on the water-based ink that is applied to the undercoated portion using the liquid composition of the present invention, and both water-based dye inks and water-based pigment inks can be used.

[0036] As a method for applying the aqueous ink to the undercoated portion using the liquid composition of the present invention, in addition to using a writing instrument such as a felt-tip pen or a marking pen, it is also possible to apply refill ink for felt-tip pens, marking pens, fountain pen stamp pads, etc. using a brush or paintbrush.

[0037] It is preferable that a painting be produced using the liquid composition of the present invention as a line drawing, since the repelled water-based ink is less likely to remain as droplets. However, even if the repelled water-based ink remains as droplets, a vivid painting can be obtained by absorbing the droplets with a cotton swab, cloth, or the like.

[0038] The liquid composition of the present invention can be produced by blending the above components and then mixing and stirring them with a stirrer. [Example]

[0039] Next, the present invention will be described in more detail with reference to examples and comparative examples.

[0040] The formulations of the examples and comparative examples are shown in Table 1. [Table 1] In the table, alkylphenol resin A is PR1133 (manufactured by Resonac Corporation), alkylphenol resin B is PR1140 (manufactured by Resonac Corporation), phenol resin is Shounol CKM-1634 (manufactured by Aica Kogyo Co., Ltd.), styrene-maleic acid resin is SCH-2 (manufactured by Gifu Ceramics Manufacturing Co., Ltd.), rosin-modified maleic acid resin is Marquid No. 32 (manufactured by Arakawa Chemical Industries Co., Ltd.), maleic acid-modified rosin ester is Tespol 1154 (manufactured by Harima Chemical Group Co., Ltd.), and polyether-modified polydimethylsiloxane is BYK-302 (manufactured by BYK Japan Co., Ltd.).

[0041] The liquid compositions of the Examples and Comparative Examples were applied to the stamp surface, and 5 minutes after transferring them to Paper A and Paper B, the aqueous inks shown in Table 2 were applied. Paper A used here was Van Nouveau V Snow White, and Paper B was OK AC Card Mashiro (both manufactured by Takeo Corporation). [Table 2] ◎: Repels water-based ink and produces a clear print 〇: Water-based ink was repelled, but water-based ink remained as droplets ×: Part or all of the print did not repel water-based ink

[0042] As is clear from the results in Table 1 above, regardless of the type of solvent or resin, the liquid compositions of Examples 1 to 12, which contained a surface conditioner, repelled the applied water-based ink and allowed a print to appear, compared to the liquid compositions of Comparative Examples 1 to 3, which did not contain a surface conditioner.

[0043] Comparing the results of Examples 1 to 8, in which the amount of surface conditioner was 0.01% by weight or more and 5.0% by weight or less, with Example 11, in which the amount of surface conditioner was less than 0.01% by weight, and Example 12, in which the amount of surface conditioner was more than 5.0% by weight, the print images produced by the liquid compositions of Examples 1 to 8 were clearer and showed better results.

[0044] Furthermore, when comparing the results of Examples 1 to 8, in which the resin content is 20% by weight or more and 80% by weight or less, with Example 9, in which the resin content is more than 80% by weight, and Example 10, in which the resin content is less than 20% by weight, the prints made with the liquid compositions of Examples 1 to 8 on Paper B were clearer, resulting in excellent results.

[0045] The present invention has been described above in relation to the embodiment that is considered to be the most practical and preferable at present. However, the present invention is not limited to the embodiment disclosed in this specification, and can be modified as appropriate within the scope of the claims and the gist or idea of ​​the invention that can be read from the entire specification, and liquid compositions with such modifications should also be understood to be included in the technical scope. [Explanation of symbols]

[0046] 10 Coating surface 11 Liquid composition 20 Surface conditioner 21 Hydrophobic part

Claims

1. A liquid composition used as an undercoat for overcoating with water-based ink, comprising at least an organic solvent, a resin soluble in said organic solvent, and a surface conditioner, and which imparts hydrophobicity to the coated surface after drying.

2. 2. The liquid composition according to claim 1, wherein the amount of the surface conditioner is 0.01% by weight or more and 5.0% by weight or less based on the total amount of the liquid composition.

3. 3. The liquid composition according to claim 1, wherein the blending amount of the resin is 20% by weight or more and 80% by weight or less based on the total amount of the liquid composition.

4. 3. The liquid composition according to claim 1, further comprising a colorant having a similar color to the material to be primed.

5. A method for creating a painting, comprising: applying a water-based ink over a sketch created using the liquid composition according to claim 1 or 2; and repelling the water-based ink to reveal the sketch.

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