KR102570035B1 - Painting guide canvas colored with high-temperature color change ink composition and manufacturing method thereof - Google Patents

Abstract

A painting guide canvas colored with a high-temperature discoloration ink composition that does not develop black marks on paint is provided. According to one embodiment of the present invention, a painting guide canvas colored with a high temperature color changeable ink composition, wherein the high temperature color changeable ink composition contains 1 to 20% by weight of a polymer resin including an acrylic compound and a urethane compound; 5 to 35% by weight of a dye; and the rest of the solvent; Including, the weight ratio of the acrylic compound and the urethane-based compound is 1: 1 to 1: 2, to provide a painting guide canvas colored with a high-temperature discoloration ink composition.

Description

Painting guide canvas colored with high-temperature discoloration ink composition and manufacturing method thereof

The present invention relates to a painting guide canvas colored with a high temperature color changeable ink composition, and more particularly, to a painting guide canvas colored with a high temperature color changeable ink composition and a manufacturing method thereof.

A reversible recording material corresponding to Leuco dye can be used as a material capable of repeating color development and extinction by converting its molecular structure by heat or light. Here, the reversible recording material refers to a reusable recording material in which an image is formed when energy is given, the image is maintained as it is when energy is no longer received, and the image disappears when another energy is applied thereto. There are various types of reversible recording materials, but among them, thermoreversible recording materials are widely used.

These thermoreversible recording materials include high-molecular/low-molecular composite type, high-molecular type, and Leuco dye type. Among them, the leuco dye type uses color tone change, and among two-component color systems, leuco dye is used as a color source It uses the reaction of dyes and colorants. Leuco dye, which is commonly used as a thermal transfer ink, is widely used for recording, but this thermoreversible material is widely used due to its excellent resolution and stability, but lacks repeatability, and is slowly discolored by heat or light, making it a document for long-term storage. had a problem that was difficult to apply.

On the other hand, the painting guide canvas is a DIY (Do it yourself) product that allows you to easily paint famous paintings by filling in colors according to the pattern. Even after the underpainting printed on the existing painting guide canvas was colored with paint, there was a problem that black marks appeared on the paint, and if the underpainting was drawn too lightly, it was difficult to recognize the lines.

An object of the present invention is to provide a painting guide canvas capable of clearly recognizing an underpainting even before discoloration after coloring.

Another object of the present invention is to provide a painting guide canvas colored with an ink composition that can easily change color depending on temperature.

Another object of the present invention is to provide a painting guide canvas colored with an ink composition having excellent fogging performance, anti-blocking properties and adhesive properties.

Another object of the present invention is to provide a method for manufacturing a painting guide canvas colored with the ink composition.

The objects of the present invention are not limited to the above-mentioned objects, and other objects and advantages of the present invention not mentioned above can be understood by the following description and will be more clearly understood by the examples of the present invention. It will also be readily apparent that the objects and advantages of the present invention may be realized by means of the instrumentalities and combinations indicated in the claims.

According to one embodiment of the present invention for achieving the above object, a painting guide canvas colored with a high temperature color changeable ink composition, wherein the high temperature color changeable ink composition contains 1 to 20% by weight of a polymer resin including an acrylic compound and a urethane compound; 5 to 35% by weight of a dye; and the rest of the solvent; Including, the weight ratio of the acrylic compound and the urethane-based compound is 1: 1 to 1: 2, to provide a painting guide canvas colored with a high-temperature discoloration ink composition.

According to one embodiment, the acrylic compound may include an aqueous acrylic dispersion.

According to one embodiment, the weight average molecular weight of the urethane-based compound may be 20,000 to 40,000 g / mol.

According to one embodiment, the amine value of the urethane-based compound may be 2.0 to 7.0 mgKOH/g.

According to one embodiment, the dye may include Leuco dye.

For example, the leuco dyes include fluorane-based leuco dyes, fluorene-based leuco dyes, diphenylmethane phthalide-based leuco dyes, indolyl phthalide-based leuco dyes, spiropyran-based leuco dyes, rhodamine lactam-based leuco dyes, and It may be one or a mixture of two or more selected from the group consisting of azaphthalide-based leuco dyes.

The high-temperature color changeable ink composition according to the present invention may further include an additive. The additive may include one or a mixture of two or more selected from the group consisting of an emulsifier, a dispersant, an antifoaming agent, a thickener, and a plasticizer.

Another embodiment of the present invention for achieving the above object is, (S1) applying the high-temperature color changeable ink composition to one side of a screen disposed on a substrate; and (S2) transferring the applied high-temperature color-changing ink composition onto one surface of the substrate, a method for manufacturing a painting guide canvas colored with the high-temperature color-changing ink composition. Specifically, the substrate includes a painting guide canvas, and the high-temperature discoloration ink composition includes 1 to 20% by weight of a polymer resin including an acrylic compound and a urethane compound; 5 to 35% by weight of a dye; and the rest of the solvent; Including, the weight ratio of the acrylic compound and the urethane-based compound may be 1: 1 to 1: 2.

According to one embodiment, the applied high-temperature color changeable ink composition may be transferred onto one surface of the substrate by extruding with a squeegee.

Another embodiment of the present invention for achieving the above object, further comprising the step of decoloring the printed layer printed by the printing method of the high temperature color changeable ink composition at a temperature of 50 to 70 ° C., the high temperature color changeable ink composition is colored A manufacturing method of the painting guide canvas may be provided. Here, the brightness of the discolored printed layer may be 6 to 10.

The solution to the above problems does not enumerate all the features of the present invention. Various features of the present invention and the advantages and effects thereof will be understood in more detail with reference to the following specific examples.

According to one aspect of the present invention, it is possible to provide a painting guide canvas capable of clearly recognizing an underpainting even before discoloration after coloring.

According to another aspect of the present invention, it is possible to provide an ink composition that can easily change color depending on temperature.

According to another aspect of the present invention, it is possible to provide an ink composition having excellent effects in all of fogging performance, blocking resistance and adhesiveness.

In addition to the above effects, specific effects of the present invention will be described together while explaining specific details for carrying out the present invention.

1 is a photograph before and after decolorization of a painting guide canvas according to an embodiment of the present invention.
2 is an actual picture of a painting guide canvas according to an embodiment of the present invention.

In this specification, singular expressions include plural expressions unless the context clearly dictates otherwise.

In this specification, a range of values expressed using the term 'to' indicates a range of numbers including the values described before and after the term as the lower limit value and the upper limit value, respectively. When a plurality of numerical values are disclosed as the upper and lower limits of any numerical range, the range of numerical values disclosed in this specification includes any one value among the plurality of lower limit values and any one value among the plurality of upper limit values. It can be understood as any range of values with a lower value and an upper value, respectively.

In this specification, 'discoloration' may mean eliminating chromatic aberration of lenses and prisms.

In this specification, 'chromatic aberration' may refer to a phenomenon in which the location and magnification of an image are changed according to color because the refractive index is different according to the color of light when an image of an object is created by a lens.

According to one embodiment of the present invention, a painting guide canvas colored with a high temperature color changeable ink composition, wherein the high temperature color changeable ink composition contains 1 to 20% by weight of a polymer resin including an acrylic compound and a urethane compound; 5 to 35% by weight of a dye; and the rest of the solvent; Including, the weight ratio of the acrylic compound and the urethane-based compound is 1: 1 to 1: 2, to provide a painting guide canvas colored with a high-temperature discoloration ink composition. Conventionally, when the weight ratio of the acrylic compound and the urethane compound is less than 1:1, the viscosity of the ink composition is lowered, resulting in printing to unwanted areas on the substrate, resulting in poor fogging performance and poor sharpness of the printed pattern. If the weight ratio of the acrylic compound and the urethane compound is greater than 1:2, the viscosity of the ink composition may be excessively high and the printing itself may not be performed, and even if it is printed, the thickness of the printed layer may be As it becomes thick, a problem may occur in print transferability during the drying process of the ink. According to one aspect of the present invention, it is possible to provide a painting guide canvas capable of clearly recognizing an underpainting even before discoloration after coloring. According to another aspect of the present invention, the weight ratio of the acrylic compound and the urethane compound (acrylic compound: urethane compound) satisfies 1: 1 to 1: 2, thereby selectively printing only the target area of the printed object well, fogging performance, anti-blocking Excellent effects can be realized in both properties and adhesiveness.

One. Painting guide canvas painted with high-temperature color change ink composition

Hereinafter, a description of the high-temperature discoloration ink composition will be described in detail.

polymer resin

The high-temperature discoloration ink composition according to the present invention improves the adhesion of the ink composition to the object to be printed and includes a polymer resin capable of facilitating the formation of a printed pattern by properly maintaining the viscosity of the ink composition.

The polymer resin according to the present invention includes an acrylic compound and a urethane compound. Specifically, the polymer resin may be a mixture of an acrylic compound and a urethane compound as a binder resin.

The content of the polymer resin according to the present invention is 1 to 20% by weight, 2 to 20% by weight, 3 to 20% by weight, 4 to 20% by weight, 5 to 20% by weight based on the total weight of the high-temperature color changeable ink composition, 6 to 20% by weight, 7 to 20% by weight, 8 to 20% by weight, 9 to 20% by weight, 10 to 20% by weight, 10 to 19% by weight, 10 to 18% by weight, 10 to 17% by weight, 10 to 10% by weight 16 wt%, 10 to 15 wt%, 10 to 14 wt%, 10 to 13 wt%, 10 to 12 wt%, or 11 to 12 wt%. When the content of the polymer resin is less than the above numerical range, a problem of deterioration in adhesion to the printed material may occur, and when the content of the polymer resin exceeds the above numerical range, a problem of resistance during peeling and ink transfer from the printed material may occur.

According to one embodiment of the present invention, the weight ratio (acrylic compound:urethane compound) of the acrylic compound and the urethane-based compound may be 1:1 to 1:2, specifically 1:1.5 to 1:2, and more specifically It may be 1:1.8 to 1:2. Conventionally, when the weight ratio of the acrylic compound and the urethane compound is less than 1:1, the viscosity of the ink composition is lowered, resulting in printing to unwanted areas on the substrate, resulting in poor fogging performance and poor sharpness of the printed pattern. If the weight ratio of the acrylic compound and the urethane compound is greater than 1:2, the viscosity of the ink composition may be excessively high and the printing itself may not be performed, and even if it is printed, the thickness of the printed layer may be As it becomes thick, a problem may occur in print transferability during the drying process of the ink. According to one aspect of the present invention, by satisfying that the weight ratio of the acrylic compound and the urethane compound (acrylic compound: urethane compound) is 1: 1 to 1: 2, fogging performance of selectively printing well only the target area of the object to be printed, anti-blocking Excellent effects can be realized in both properties and adhesiveness.

The acrylic compound according to the present invention may include an aqueous acrylic dispersion in order to impart adhesiveness of the printing layer to the object to be printed. Specifically, the solid content of the aqueous acrylic dispersion may be 20 to 40% by weight, more specifically 30 to 40% by weight, and more specifically 30 to 35% by weight. For example, the acrylic compound may be prepared by various polymerization methods using one or two or more monomers selected from the group consisting of methyl methacrylate, methacrylic acid, 2-ethylhexyl acrylate and 2-hydroxyethyl methacrylate. It may be a polymer compound synthesized as

The acrylic compound may have a weight average molecular weight (M _w ) of 10,000 to 500,000 g/mol, specifically 50,000 to 400,000 g/mol, and more specifically 100,000 to 200,000 g/mol. When the weight average molecular weight of the acrylic compound is within the above numerical range, the viscosity of the ink composition is maintained at an appropriate level, so that a desired portion can be accurately printed on the object to be printed and the print transferability can be excellent.

The urethane-based compound according to the present invention may impart adhesiveness of the printed layer to the object to be printed. Specifically, the weight average molecular weight (M _w ) of the urethane-based compound may be 20,000 to 40,000 g/mol, more specifically 20,000 to 30,000 g/mol, and more specifically 25,000 to 30,000 g/mol. When the weight average molecular weight of the urethane-based compound is within the above numerical range, the viscosity of the ink composition is maintained at an appropriate level, so that the desired portion can be accurately printed on the object to be printed and the print transferability can be excellent.

According to one embodiment of the present invention, the urethane-based compound may have an amine value of 2.0 to 7.0 mgKOH/g. The amine value of the urethane-based compound means the content of amines included in the urethane-based compound, and can be analyzed, for example, through titration with hydrochloric acid.

dyes

A dye is included to impart color to the ink composition according to the present invention. Specifically, the dye may include Leuco dye. On the other hand, leuco dye may be a compound that changes color by reacting with an electron acceptor, a developer, by acting as an electron donor depending on conditions such as temperature and pressure.

For example, the leuco dyes include fluorane-based leuco dyes, fluorene-based leuco dyes, diphenylmethane phthalide-based leuco dyes, indolyl phthalide-based leuco dyes, spiropyran-based leuco dyes, rhodamine lactam-based leuco dyes, And it may be one or a mixture of two or more selected from the group consisting of azaphthalide-based leuco dyes, and specifically may be fluorane-based leuco dyes. For example, the fluorane-based leuco dye is 2'-(dibenzylamino)-6'-(diethylamino)fluoran, 3-diethylamino-6-methyl-7-anilinofluorane, 3-di Butylamino-6-methyl-7-anilinofluoran, 3-(N-methyl-N-cyclohexylamino)-6-methyl-7-anilinofluoran, 3-(N-ethyl-N-isopentyl Amino)-6-methyl-7-anilinofluoran, 3-isobutylethylamino-6-methyl-7-anilinofluoran, 3-[N-ethyl-N-(3-ethoxypropyl)amino] -6-methyl-7-anilinofluoran, 3-(N-ethyl-N-hexylamino)-6-methyl-7-anilinofluoran, 3-dipentylamino 6-methyl-7-anilinofluoro Ran, 3-(N-methyl-N-propylamino)-6-methyl-7-anilinofluoran, 3-(N-ethyl-N-tetrahydrofurylamino)-6-methyl-7-anilinofluoran Ran, 3-diethylamino-6-methyl-7- (p-chloroanilino) fluoran, 3-diethylamino-6-methyl-7- (o-chloroanilino) fluoran, 3- (p -Toluidinoethylamino)-6-methyl-7-anilinofluorane, 3-diethylamino-6-methyl-7-(p-toluidino)fluorane, 3-diethylamino-7-( o-chloroanilino)fluoran, 3-dibutylamino-7-(o-chloroanilino)fluoran, 3-diethylamino-7-(o-fluoroanilino)fluoran, 3-dibutyl Amino-7-(o-fluoroanilino)fluoran, 3-diethylamino-7-(3,4-dichloroanilino)fluoran, 3-pyrrolidino-6-methyl-7-anilinofluoro Ran, 3-diethylamino-6-chloro-7-ethoxyethylaminofluoran, 3-diethylamino-6-chloro-7-anilinofluorane, 3-diethylamino-7-chlorofluorane, 3-diethylamino-6-chloro-7-methylfluoran, 3-diethylamino-7-methylfluoran, 3-diethylamino-7-octylaminofluoran, 3-diethylamino-7-phenyl It may be one or a mixture of two or more selected from the group consisting of fluorane and 3-(p-toluidinoethylamino)-6-methyl-7-phenethylfluoran.

The dye according to the present invention may further include a color developer that better realizes color by accepting electrons provided from the leuco dye when heat is applied. For example, the color developer is not particularly limited and may be any compound capable of realizing a specific color in combination with a leuco dye. Specifically, the color developer may include a phenol-based compound, and more specifically, may include a phenol-based oxide. For example, the color developer may include bisphenol A.

If necessary, the dye according to the present invention may further include one or a mixture of two or more selected from the group consisting of a styrene-maleic anhydride copolymer, an amino resin, and methyl behenate.

The content of the dye according to the present invention is 5 to 35% by weight, 10 to 35% by weight, 14 to 33% by weight, 15 to 30% by weight, 20 to 30% by weight, 22% by weight based on the total weight of the high-temperature color changeable ink composition. to 30% by weight, 23 to 30% by weight, 25 to 30% by weight, 26 to 30% by weight, 27 to 30% by weight, 28 to 30% by weight or 28 to 29% by weight. If the content of the dye is less than the above numerical range, a problem may occur in which the color development function of the ink composition is not sufficiently implemented, and if the content of the dye exceeds the above numerical range, a problem in that the formation of a printed pattern is difficult due to aggregation of the dye occurs, or the ink composition If the viscosity is excessively high, clogging may occur.

menstruum

The high-temperature color changeable ink composition according to the present invention includes a solvent to dissolve the polymer resin and dye.

The amount of the solvent according to the present invention may be the amount remaining except for the polymer resin and the dye based on the total weight of the high-temperature color changeable ink composition. For example, the amount of the solvent may be 30 to 80% by weight based on the total weight of the high-temperature color changeable ink composition.

For example, the solvent may be one or a mixture of two or more selected from the group consisting of water, ethanol, isopropanol, ethylene glycol, 2-isopropoxy ethanol, acetone, butyl carbitol acetate, and acetoxy acetyl chloride.

additive

If necessary, the high-temperature discoloration ink composition according to the present invention may further include additives.

The additive according to the present invention may include one or a mixture of two or more selected from the group consisting of an emulsifier, a dispersant, an antifoaming agent, a thickener, and a plasticizer. The content of the additives may be appropriately modified according to the purpose.

The emulsifier according to the present invention can improve the miscibility of the color changing ink composition. For example, the emulsifier is glyceryl myristic acid, glyceryl monostearate, glyceryl monoisostearate, glyceryl monooleate, glyceryl dioleate, glyceryl distearate, diglyceryl monostearate, mono Diglyceryl Oleate, Diglyceryl Dioleate, Diglyceryl Monoisostearate, Diglyceryl Triisostearate, Tetraglyceryl Monostearate, Tetraglyceryl Monooleate, Tetraglyceryl Tristearate, Pentastearic Acid Tetraglyceryl, tetraglyceryl pentaoleate, hexaglyceryl monolaurate, hexaglyceryl monomyristic acid, hexaglyceryl monostearate, hexaglyceryl monooleate, hexaglyceryl tristearate, hexaglyceryl tetrabehenate 1 selected from the group consisting of glyceryl, hexaglyceryl pentastearate, hexaglyceryl pentaoleate, hexaglyceryl polylinolenic acid, decaglyceryl monolaurate, decaglyceryl monomyristate, and decaglyceryl monostearate It may be a species or a mixture of two or more species.

The dispersant according to the present invention may contribute to uniformly dispersing the solids contained in the high-temperature color changeable ink composition without aggregation. For example, the dispersant may include a polyester-polyamine copolymer. Specifically, the OH value of the polyester-polyamine copolymer may be 60 to 70 mg KOH/g. According to one embodiment of the present invention, by using a polyester-polyamine copolymer as the dispersing agent, it is possible to effectively prevent aggregation of solids, thereby further improving fogging performance and adhesive performance.

The antifoaming agent according to the present invention can effectively prevent defects from occurring during printing by removing bubbles generated during use or storage of the high-temperature discoloration ink composition. For example, the antifoaming agent may include a silicone-based compound.

The thickener according to the present invention can increase the viscosity of the high-temperature color changeable ink composition. For example, the thickener may be one or a mixture of two or more selected from the group consisting of polyacrylic acid and crosslinked copolymers thereof, polyvinyl alcohol, polyvinylpyrrolidone and derivatives thereof, and polyvinylmethyl ether and derivatives thereof. there is.

The plasticizer according to the present invention may provide flexibility to a film (printing layer) prepared by applying the high-temperature discoloration ink composition to an object to be printed. For example, the plasticizer may include one or a mixture of two or more selected from the group consisting of a phthalic acid ester compound, an alkyl sulfonic acid phenyl ester compound, adipic acid, phosphate, and citrate, and specifically citric acid salts may be included. According to one embodiment of the present invention, when citrate is used as the plasticizer, flexibility is better imparted to the print layer compared to other plasticizers, so that the effect of reducing resistance when the print layer is peeled off can be realized.

According to another embodiment of the present invention, since the high-temperature color changeable ink composition simultaneously includes the dispersant and the plasticizer, an effect of reducing resistance when the printed layer is peeled off may be realized. Specifically, the weight ratio of the dispersant and the plasticizer may be 1:1 to 1:2.

2. Manufacturing method of painting guide canvas colored with high-temperature discoloration ink composition

Another embodiment of the present invention, (S1) applying the high-temperature color changeable ink composition to one side of a screen disposed on a substrate; and (S2) transferring the applied high-temperature color-changing ink composition onto one surface of the substrate, a method for manufacturing a painting guide canvas colored with the high-temperature color-changing ink composition.

According to one embodiment, the applied high-temperature color changeable ink composition may be transferred onto one surface of the substrate by extruding with a squeegee.

The substrate may include a painting guide canvas.

For example, the hardness of the squeegee may be 65 to 75 Shore A (Shore A).

The manufacturing method of the painting guide canvas colored with the high temperature color changeable ink composition according to the present invention may further include (S3) drying the high temperature color changeable ink composition transferred on one side of the substrate. For example, the step (S3) may be a step of drying the transferred high-temperature discoloration ink composition at 35 to 40° C. for 5 to 15 minutes.

According to another embodiment of the present invention, the painting guide canvas colored with the high-temperature color-change ink composition further comprising the step of decoloring the print layer printed by the method of printing the high-temperature color-change ink composition at a temperature of 50 to 70 ° C. A manufacturing method can be provided. Here, the brightness of the discolored printed layer is 6 to 10. By decoloring the printed layer within the above temperature range, the brightness of the printed layer of 0 to 5 may be changed to 6 to 10, 7 to 10, 8 to 10, or 9 to 10. For example, an 11-step brightness standard may be used as a method for analyzing the brightness of the printed layer.

The printed layer made of the high-temperature color changeable ink composition may be discolored by reaching the above temperature range.

For example, as a method for decolorizing the printed layer, a thermal decolorant commercially available in the art or a heating oven may be used. Specifically, the thermal decolorant may include a thermal initiator commonly used in the art. For example, the thickness of the printed layer may be 5 to 10 μm or 7 to 8 μm.

In addition, the printed layer according to an embodiment of the present invention may be configured such that the decolored ink is restored to a primary color when the temperature is lower than -2 to -5 ° C, and then heated to a temperature of 50 to 70 ° C. can be colored

This configuration can be used when additionally modifying colors or patterns through checking the sketch after coloring.

Hereinafter, an embodiment of the present invention will be described in detail so that those skilled in the art can easily practice it, but this is only one example, and the scope of the present invention is Not limited.

[Preparation Example 1: Synthesis of Urethane Compound]

Synthesis of prepolymer

111.99 parts by weight of poly(1,2-propylene adipate)diol (hydroxyl group = 56.1 mgKOH/g) with a number average molecular weight of 2000 g/mol, water 111.99 parts by weight of poly(1,2-propylene glycol) having an average molecular weight of 1000 g/mol (hydroxyl value of 112.2 mgKOH/g), 52.65 parts by weight of tolylenediisocyanate (TDI), 0.03 parts by weight of tin (II) 2-ethylhexanoate part, and 82.5 parts by weight of ethyl acetate, and reacted at 90 DEG C for 3 hours under a nitrogen stream to obtain 359.16 parts by weight of a terminal isocyanate prepolymer solution.

Synthesis of urethane compounds

To a mixture of 21.74 parts by weight of isophoronediamine, 1.64 parts by weight of monoethanolamine, 290 parts by weight of isopropyl alcohol, and 327.47 parts by weight of ethyl acetate, 359.16 parts by weight of the terminal isocyanate prepolymer solution obtained above was gradually added at room temperature, and then 50 parts by weight The reaction was performed at °C for 1 hour to synthesize a urethane-based compound having a solid content of 30.0% by weight, a weight average molecular weight of 30,000g/mol, and an amine value of 4.0mgKOH/g.

[Preparation Example 1: Preparation of high-temperature discoloration ink composition]

A high-temperature color changeable ink composition was prepared by mixing the composition according to Table 1 below.

Classification (unit: % by weight) Comparative Example 1 Comparative Example 2 Example 1 Example 2 Example 3 Example 4 polymer resin Acrylic compound ¹⁾ 8 3 4 6 4 4 Urethane-based compound ²⁾ 4 9 8 6 8 8 dye ³⁾ 28 28 28 28 28 28 solvent (water) 60 60 60 60 59 58 Dispersant ⁴⁾ - - - - One One plasticizer ⁵⁾ - - - - - One total sum 100 100 100 100 100 100 1) Aqueous acrylic dispersion having a solid content of 32.4% by weight (Neocryl A-612)
2) Manufacturing Preparation Example 1
3) electron donor 2'-(dibenzylamino)-6'-(diethylamino)fluoran (2'-(Dibenzylamino)-6'-(diethylamino)fluoran); and a developer (bisphenol A) as an electron acceptor; a dye mixed with a weight ratio of 9:1.
4) Polyester-polyamine copolymer with OH value of 64.5mg KOH/g and TBN (Total base number) of 54.2mgKOH/g
5) Acetyl Tributyl Citrate (CAS 77-90-7)

[Preparation Example 2: Preparation of Painting Guide Canvas Colored with High-Temperature Discoloration Ink Composition]

Printing was performed under screen printing process conditions according to Table 2 using the ink compositions according to Comparative Examples 1 and 2 and Examples 1 to 4. Here, the object to be printed is a canvas as a laminated structure in which a mold prevention layer, an oil absorption layer, a crack prevention layer, a pattern printing layer, a UV finishing layer, and a vacuum packing layer are sequentially stacked in order.

Screen printing process conditions detail application thickness 7~8㎛ Print Engraving Mesh #300 print drying conditions 35 ~ 40℃/10min Squeegee Hardness (Shore A) 70 Shore A

[Experimental Example 1: Print Quality Evaluation]

After manufacturing a colored painting guide canvas by performing a screen printing process in the method according to Preparation Example 2, fogging, blocking resistance, and adhesiveness were evaluated by the following measurement methods.

1) Fogging

The printed matter produced under the process conditions according to Table 2 was pasted on black paper, and the amount of ink attached to the blank portion was visually evaluated based on the following criteria. As the amount of ink attached to the blank portion decreases, it may mean that only the target portion of the object to be printed is selectively well printed.

◎: Transfer of the ink was not observed at all in the blank area.

O: Slight transfer of ink was seen in the blank area.

(triangle|delta): Transfer|transition of the ink was seen in the large area of a blank part.

X: Transition of the ink was observed over the entire blank portion.

2) Blocking resistance

When the printed surface of the printed specimen (4cmХ4cm) manufactured under the process conditions according to Table 2 and the untreated surface of the same size unprinted film are pressed together at 50 ° C and 10 kgf for 12 hours, and the printed specimen is peeled off. Ink removal and resistance of the ink were evaluated according to the following criteria. The lower the resistance when the printed specimen is peeled off, the better the blocking resistance.

◎: No transfer of ink was seen from the printed matter, and there was no sense of resistance at the time of peeling.

O: No transfer of ink was seen from the printed matter, but there was a sense of resistance at the time of peeling.

(triangle|delta): Transition of ink from a printed matter was seen in the area of 10% or more and less than 50%.

X: Transition of the ink from the printed matter was observed in an area of 50% or more.

3) Adhesion

Cellophane tape (manufactured by Nichiban Co., Ltd., width 12 mm) was attached to the printed matter obtained in the blocking resistance test, rubbed strongly with a thumb 5 times, and then slowly peeled off the cellophane tape, then rapidly peeled off the ink film peeling degree was evaluated according to the following criteria.

◎: Peeling of ink was not seen at all even if it was peeled off slowly or rapidly.

O: No peeling of the ink was observed even when peeled off slowly, but peeling of the ink was observed in less than 20% of the area when peeled off rapidly.

(triangle|delta): Peeling of ink was not seen even if it peeled off slowly, but peeling of ink was seen in 20% or more of an area when peeled off rapidly.

X: Peeling of most of ink was seen even if it peeled off slowly.

evaluation items Comparative Example 1 Comparative Example 2 Example 1 Example 2 Example 3 Example 4 Fogging X ○ ○ ○ ◎ ◎ blocking resistance △ X ○ ○ ○ ◎ adhesiveness △ △ ○ ○ ◎ ◎

Comparing Comparative Examples 1 and 2 and Examples 1 to 4 from the viewpoint of the weight ratio (acrylic compound:urethane compound) of the acrylic compound and the urethane-based compound in Table 3 above, when the weight ratio of the acrylic compound and the urethane-based compound is less than 1:1, the ink composition The viscosity of the is lowered, resulting in printing to an unwanted area on the object to be printed, resulting in poor fogging performance and poor sharpness of the printed pattern, which can cause problems in forming the printed pattern, and the weight ratio of the acrylic compound and the urethane compound is 1:2 If the viscosity of the ink composition is excessively high, printing itself may not be possible, and even if printing is performed, the thickness of the printing layer becomes thick, which may cause a problem in print transferability during the drying process of the ink. On the other hand, when the weight ratio of the acrylic compound and the urethane compound (acrylic compound:urethane compound) is 1: 1 to 1: 2, the fogging performance, blocking resistance and adhesiveness of selectively printing only the target area of the object are excellent. I can confirm that it can be excellent.

[Experimental Example 2: Pictures of painting guide canvas before and after fading]

1 is a photograph before and after decolorization of a painting guide canvas according to an embodiment of the present invention. Referring to FIG. 1, it can be confirmed that the printing pattern is discolored when the painting guide canvas manufactured using the screen printing method according to an embodiment of the present invention is heated to a temperature of 60°C.

[Experimental Example 3: Actual Photo of Painting Guide Canvas]

2 is an actual picture of a painting guide canvas according to an embodiment of the present invention.

Referring to FIG. 2 , it can be confirmed that the painting guide canvas according to the present invention is actually implemented.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concept of the present invention defined in the following claims are also present. fall within the scope of the invention.

Claims (10)

A painting guide canvas on which a high-temperature discoloration ink composition is colored by a screen printing method,
The high-temperature discoloration ink composition,
10 to 19% by weight of a polymer resin including an acrylic compound and a urethane compound including an aqueous acrylic dispersion;
5 to 35% by weight of Leuco dye; and
One or two or more selected from the group consisting of water, ethanol, isopropanol, ethylene glycol, 2-isopropoxy ethanol, acetone, butylcarbitol acetate, and acetoxy acetyl chloride, with the remaining content except for the polymer resin and dye a solvent that is a mixture; including,
The weight ratio of the acrylic compound and the urethane compound is 1:1 to 1:2,
The high-temperature color changeable ink composition is discolored when the temperature is raised to 50 to 70 ° C., has a brightness of 6 to 10 based on the 11-step brightness, and is restored to a primary color at -5 ° C to -2 ° C or less, and has a brightness of 0 to 11 based on the 11-step brightness. having a brightness of 5,
A painting guide canvas coated with a high-temperature color change ink composition.
delete According to claim 1,
The weight average molecular weight of the urethane-based compound is 20,000 to 40,000 g / mol,
A painting guide canvas coated with a high-temperature color change ink composition.
delete According to claim 1,
The leuco dye,
Fluorane-based leuco dyes, fluorene-based leuco dyes, diphenylmethane phthalide-based leuco dyes, indolyl phthalide-based leuco dyes, spiropyran-based leuco dyes, rhodamine lactam-based leuco dyes, and azaphthalide-based leuco dyes One or a mixture of two or more selected from the group consisting of
A painting guide canvas coated with a high-temperature color change ink composition.
According to claim 1,
additive; Including more,
The additive is
Containing one or a mixture of two or more selected from the group consisting of emulsifiers, dispersants, antifoaming agents, thickeners and plasticizers,
A painting guide canvas coated with a high-temperature color change ink composition.
delete (S1) applying a high temperature color changing ink composition to one side of a screen disposed on a substrate;
(S2) transferring the applied high-temperature color changeable ink composition onto one side of the substrate; and
(S3) discoloring the printed layer formed by transferring the high-temperature discoloration ink composition at a temperature of 50 to 70 ° C; including,
The substrate includes a painting guide canvas,
The high-temperature discoloration ink composition,
10 to 19% by weight of a polymer resin including an acrylic compound and a urethane compound including an aqueous acrylic dispersion;
5 to 35% by weight of Leuco dye; and
One or two or more selected from the group consisting of water, ethanol, isopropanol, ethylene glycol, 2-isopropoxy ethanol, acetone, butylcarbitol acetate, and acetoxy acetyl chloride, with the remaining content except for the polymer resin and dye a solvent that is a mixture; including,
The weight ratio of the acrylic compound and the urethane compound is 1:1 to 1:2,
The brightness of the printed layer discolored in the step (S3) is 6 to 10 based on the brightness of the 11th step, and when the printed layer is cooled to -5 ° C to -2 ° C or less, the faded printed layer is restored to the original color and the 11th step brightness Having a brightness of 0 to 5 as a standard,
A method of manufacturing a painting guide canvas colored with a high-temperature discoloration ink composition.
According to claim 8,
The applied high-temperature color changeable ink composition is extruded with a squeegee and transferred onto one side of the substrate,
A method of manufacturing a painting guide canvas colored with a high-temperature discoloration ink composition.
delete