KR20110038306A - Microemulsion comprising diacetylene monomer for using as ink of ink-jet printer, preparation method thereof and uses thereof - Google Patents

Abstract

PURPOSE: An oil in water microemulsion comprising diacetylene is provided to minimize the blockage at a nozzle for an ink-jet printer and to print clear image on various material such as a paper and film. CONSTITUTION: An oil in water microemulsion for ink includes a diacetylene monomer represented by chemical formula 1, organic solvent, water-soluble organic solvent, water and surfactant. In chemical formula 1, d+g is 0, 1 or 2; e+f is an integer of 2-50; e and f are an integer more than 1; A and B are a methyl group, amine group, hydroxyl group, maleimide group, biotin group, N-hydroxysuccineimide group, benzoic acid, or activated ester group; and L1 and L2 are an alkyl group with carbon number of 2 or greater', at least one ethyleneoxide group, amine group, amide group, ester group, or carbonyl group.

Description

Diacetylene-containing microemulsions that can be used as ink in inkjet printers, methods for preparing the same, and uses thereof.

The present invention relates to a diacetylene-containing microemulsion that can be used as an ink in an inkjet printer, a method for preparing the same, and a use thereof, and more particularly, to include a diacetylene containing a change in color and fluorescence by recognizing changes in the external environment. To oil-in-water (O / W) microemulsions, methods for their preparation and uses thereof.

FIELD OF THE INVENTION The present invention relates to microemulsions containing diacetylene and methods for their preparation and their use as inks in inkjet printers using the same. More specifically, the present invention relates to a method for preparing an oil-in-water (O / W) microemulsion comprising a diacetylene monomer, a surfactant, at least one organic solvent and water, and then applying the same to an inkjet printer. It is about.

Polydiacetylene is a polymer of diacetylene monomers, irradiated with ultraviolet rays or gamma rays when the double bond and triple bonds are alternately present in the polymer main chain and the diacetylene monomers are in close proximity to have a crystalline or semi-crystalline structure. It is a conjugated polymer that has the characteristics of making. In general, when polydiacetylene, which is dispersed in an aqueous solution or exists in a thin film form on a solid substrate under optimal conditions, a blue color showing maximum absorption wavelength is obtained at about 650 nm. The blue polydiacetylene thus prepared is changed into a red solution having a maximum absorption wavelength at about 550 nm by the appropriate external environment change. For example, heating a blue polydiacetylene solution converts the color of the solution from blue to purple to red (Kim & Ahn et al., Macromolecules, 38: 9366, 2005). This color transition phenomenon from blue to red is not only temperature, but also molecular recognition (see, for example, US Pat. No. 6,001,556; US Pat. No. 6,180,135; US Pat. No. 6,180,135; US Pat. No. 6,080,423). Ahn & Kim et al., Journal of the American Chemical Society, 125: 8976, 2003), and the like, and various sensors using such an embolism have been reported. Recently, blue polydiacetylene does not fluoresce, but a sensor using a feature that causes fluorescence when a color transition occurs in red has been reported (Kim & Ahn et al., Journal of the American Chemical Society, 127: 17580). , 2005).

In addition, polydiacetylene has been studied as an optical material because it exhibits a conjugated structure due to p-orbital connected to the main chain of the polymer and a nonlinear optical property due to this structural property. Tripathy et al., Journal of Physical Chemistry B, 103: 11050, 1999).

The polydiacetylene sensors reported so far are dispersed in aqueous solution (Kim et al. Macromolecules, 38: 9366, 2005), film forms on solid substrates (Charych et al , Science, 261: 585, 1993). ), Fixed to solid structures (Gill & Ballesteros, Angewandte Chemie International Edition, 42: 3264, 2003 and Kim et al, Advanced Materials, 15: 1118, 2003), integrated into microarray chips (see: Kim et al., Journal of the American Chemical Society, 127: 17580, 2005), and microfluidic chip forms using fluid concentrating effects (Eo et al. Advanced Materials, 20: 1690, 2008).

So far, the following has been reported as an ink composition related to polydiacetylene.

In US Patent Publication No. 2004-0259975, polydiacetylene was used as a sensitizer in a photobleachable ink composition. In addition, US Patent No. 5,324,567 discloses an ink composition comprising a polydiacetylene, a phenol resin, a wax, and a desiccant. Korean Patent Publication No. 2007-0052314 discloses a polydiacetylene sensor composition containing a reactive isocyanate.

The polydiacetylene ink compositions disclosed in the above-mentioned US Patent Publication No. 2004-0259975 and US Patent No. 5,324,567 have a disadvantage that the polydiacetylene is not the main component of the ink or can not be used in general office inkjet printing. Conventional polydiacetylene ink composition uses a method that is coated on the large area rather than the inkjet method.

In general, when polydiacetylene is dispersed in an aqueous solution, it can be printed using an inkjet printing technique. However, since the concentration of polydiacetylene is very thin (up to about 5 mM), it is not easy to visually observe the generated image after printing. . In addition, there is a disadvantage that the nozzle of the print head is easily clogged due to agglomeration of polydiacetylene particles. An example of manufacturing a microarray chip by an inkjet method using an aqueous solution in which polydaacetylene particles are dispersed is reported (Kim et al, Journal of the American Chemical Society, 127: 17580, 2005). Is different from the inkjet print heads used in general offices, and its operation speed is very slow, so its use is limited and only a small area such as microscope slide glass can be used, which can not be printed on general office A4 paper.

The present inventors solve the problems that may occur when using the above-described composition containing polydiacetylene in a commonly used inkjet printer, for example, clogging of the print head, blurred images due to low concentration, etc. As a result of thorough research, the present invention was developed by developing an oil-in-water microemulsion containing diacetylene that can be printed on various substrates such as paper, film, etc. using A4 paper as an inkjet printer used in a general office at high speed. It was completed.

DISCLOSURE OF THE INVENTION An object of the present invention is to minimize clogging in the nozzle of an inkjet printer, and a diacetylene-containing oil-in-water microemulsion that can be printed as a clear image on various substrates such as paper and film using an inkjet printer which is generally used. And a method for producing the same, and a use thereof as an ink of the inkjet printer.

In order to achieve the above object, the present invention is a die acetylene-containing microemulsion used as an ink in an inkjet printer, characterized in that consisting of a diacetylene monomer represented by the formula (1), an organic solvent, water, a water-soluble organic solvent and a surfactant A microemulsion for ink is provided.

[Formula 1]

In Chemical Formula 1,

d + g is 0,1 or 2, e + f is an integer from 2 to 50, e and f are integers greater than 1,

A and B are methyl group, amine group, carboxyl group, hydroxy group, maleimide group, biotin group, N-hydroxysuccinimide group, benzoic acid group or activated ester group,

L ₁ and L ₂ are the same as or different from each other and are an alkyl group having 2 or more carbon atoms, at least one ethylene oxide group, an amine group, an amide group, an ester group or a carbonyl group.

The diacetylene-containing microemulsion according to the present invention is 1 to 10% by weight of the diacetylene monomer represented by Formula 1, 10 to 40% by weight of an organic solvent, 20 to 45% by weight of a water-soluble organic solvent, 15 to 40% by weight of water and an interface It is an oil-in-water microemulsion for inks comprising 7-30% by weight of active agent.

When the diacetylene-containing microemulsion according to the present invention contains less than 1% by weight of the diacetylene monomer represented by Formula 1, a blurry image due to low concentration may be realized, and the diacetylene-containing microemulsion according to the present invention When the diacetylene monomer represented by the formula (1) is included in excess of 10% by weight may not be sufficiently dissolved in the organic solvent due to the high concentration.

When the diacetylene-containing microemulsion according to the present invention contains less than 7% by weight of surfactant, the organic solvent and water may not be mixed well, and the diacetylene-containing microemulsion according to the present invention may contain more than 30% by weight of surfactant. If included, the excess surfactant may blur the image.

When the diacetylene-containing microemulsion according to the present invention contains less than 10% by weight of organic solvent, the diacetylene may not be sufficiently dissolved in the organic solvent, and the organic solvent is more than 40% by weight in the diacetylene-containing microemulsion according to the present invention. If included, the organic solvent and water may not mix well.

If the diacetylene-containing microemulsion according to the present invention contains less than the minimum amount of water-soluble organic solvent or water described above, the surfactant may not be sufficiently dissolved, and the diacetylene-containing microemulsion according to the present invention may contain a water-soluble organic solvent or water. When included in excess of the maximum amount described above, the organic solvent and water may not be mixed.

In one embodiment of the present invention, the diacetylene monomer is 10,12-pentacosadiynoic acid represented by the following formula (2,10,12-pentacosadiynoic acid), 5,7-eicos represented by the following formula (3) Dinoic acid (5,7-eicosadiynoic acid), 8,10-heneicosadiynoic acid represented by the following formula (4), 4,6-heptadecadinoic acid represented by the following formula (5) 4,6-heptadecadiynoic acid), 10,12-tricosadiynoic acid represented by the following formula (6), 10,12-docosadiindioic acid represented by the following formula (10,12- docosadiyndioic acid) may be used alone or in combination.

[Formula 2]

CH _3- (CH ₂ ) ₁₁ -C≡CC≡C- (CH ₂ ) ₈ -COOH

(3)

CH _3- (CH ₂ ) ₁₁ -C≡CC≡C- (CH ₂ ) ₃ -COOH

[Formula 4]

CH _3- (CH ₂ ) ₉ -C≡CC≡C- (CH ₂ ) ₆ -COOH

[Chemical Formula 5]

CH _3- (CH ₂ ) ₉ -C≡CC≡C- (CH ₂ ) ₂ -COOH

[Formula 6]

CH _3- (CH ₂ ) ₉ -C≡CC≡C- (CH ₂ ) ₈ -COOH

[Formula 7]

COOH- (CH ₂ ) ₈ -C≡CC≡C- (CH ₂ ) ₈ -COOH

The surfactant may be anionic surfactants such as sodium dodecyl sulfate (SDS), sodium 1-dodecanesulfonate (SDSF), sodium laurate (SL), and the like. Cetyltrimethylammonium bromide (CTAB), cetyltrimethylammonium chloride (CTAC), dodecyltrimethylammonium bromide (DTAB), dodecyltrimethylammonium chloride (DTAC) Cationic surfactants such as distearyl ammonium chloride (DDAC) may be used, and anionic surfactants such as sodium dodecyl sulfate, sodium 1-dodecanesulfonate, and the like may be preferably used.

The organic solvent may be used without limitation as long as it is not mixed with water such as toluene, ethyl acetate, ethyl acetate, chloroform, dichloromethane, and the like. Preferred for preparing

The water-soluble organic solvent is not particularly limited, but linear alcohols containing 2 to 3 carbon atoms such as ethanol and n-propanol and mixtures thereof may be used.

The present invention provides a method for preparing a diacetylene-containing microemulsion used as an ink in an inkjet printer, comprising: dissolving the diacetylene monomer represented by Formula 1 in an organic solvent to prepare a first mixture; And adding the first mixture to a second mixture of a surfactant, water, and a water-soluble organic solvent, in a diacetylene-containing microemulsion.

Hereinafter, the method for preparing the diacetylene-containing microemulsion according to the present invention will be described in more detail.

First, the first mixture is prepared by dissolving the diacetylene monomer represented by Formula 1 in an organic solvent.

In the present invention, as the diacetylene monomer, the above-described diacetylene monomer in the diacetylene-containing microemulsion according to the present invention may be used, and 10,12-pentacosadinoic acid represented by Chemical Formulas 2 to 7, 5,7- The use of eicosadienoic acid, 8,10-heneicosadinoic acid, 4,6-heptadecadinoic acid, 10,12-tricosadinoic acid, 10,12-docosadiindioic acid or the like alone or in combination desirable.

As the organic solvent that can be used in the present invention, as long as it is not mixed with water, such as toluene, ethyl acetate, chloroform, dichloromethane, and the like, it can be used without limitation, and toluene is preferable.

Next, the first mixture is added to a second mixture of a surfactant, water and a water-soluble organic solvent.

As the water-soluble organic solvent, as described above, linear alcohols containing 2 to 3 carbon atoms such as ethanol and n-propanol and mixtures thereof may be used.

As said surfactant, the anionic surfactant or cationic surfactant mentioned above can be used.

Diacetylene-containing microemulsion prepared according to the manufacturing method of the present invention described above 1 to 10% by weight of the diacetylene monomer, 10 to 40% by weight of the organic solvent, 20 to 45% by weight of the water-soluble organic solvent based on the total weight of the microemulsion 15 to 40% by weight of water and 7 to 30% by weight of surfactant.

In addition, the present invention is a step of printing a predetermined image on a substrate by applying a water-in-oil microemulsion for ink containing a diacetylene monomer represented by the formula (1), an organic solvent, a water-soluble organic solvent, water and a surfactant to an inkjet printer ; And it provides a printing method using a polydiacetylene conjugated polymer comprising the step of polymerizing the diacetylene monomer by exposing the image printed on the substrate.

The printing method using the polydiacetylene conjugated polymer according to the present invention will be described with reference to FIG.

1 is a view schematically showing a process of the printing method using the polydiacetylene conjugated polymer of the present invention.

Referring to FIG. 1, an oil-in-water microemulsion 110 for ink containing a diacetylene monomer represented by Chemical Formula 1, an organic solvent, a water-soluble organic solvent, water, and a surfactant is injected into a cartridge 100 of an inkjet printer. Thereafter, a predetermined image is printed on the substrate 160 through the nozzle 120 of the inkjet printer. Subsequently, the ink microemulsion 110 is polymerized by polymerizing a diacetylene monomer dispersed in the ink microemulsion 110 with polydiacetylene through an exposure process using an ultraviolet light or the like on which a predetermined image is printed. ) Can be printed.

The oil-in-water microemulsion 110 for ink containing a diacetylene monomer represented by Formula 1, an organic solvent, a water-soluble organic solvent, water, and a surfactant is the above-described die acetylene-containing microemulsion, based on the total weight of the microemulsion. 1 to 10% by weight of a diacetylene monomer, 10 to 40% by weight of an organic solvent, 20 to 45% by weight of a water-soluble organic solvent, 15 to 40% by weight of water and 7 to 30% by weight of the surfactant can be prepared.

As the diacetylene monomer, the organic solvent, the water-soluble organic solvent, and the surfactant, the same as those described in the die acetylene-containing microemulsion of the present invention can be used, and as the diacetylene monomer, 10,12-pentacosadinoic acid, 8, 10-heneicosadinoic acid and 10,12-tricosadinoic acid are used, and anionic surfactants such as sodium dodecyl sulfate, sodium 1-dodecanesulfonate, and the like are more vivid and strong. Preferred for image implementations that represent blue.

The substrate 160 may be any printable substrate such as plain paper, glossy paper, paper for paper, film, cloth, etc. without limitation.

In addition, the inkjet printer that can be used in the present invention is not particularly limited, and an inkjet printer using a cartridge containing an inkjet composition is preferable.

The exposure treatment of the substrate on which the predetermined image is printed is not particularly limited, but may be performed by irradiating ultraviolet rays at 254 nm for 1 to 10 minutes.

As shown in FIG. 1, the oil-in-water microemulsion 110 for ink is present in a state where the diacetylene monomer 130 is dispersed in an organic solvent. According to the method described above, after printing a predetermined image on the substrate 160 and subjecting it to exposure, the diacetylene monomer 130 may be polymerized into the polydiacetylene conjugated polymer 140.

The polydiacetylene conjugated polymer 140 polymerized in the printed state as described above exhibits a characteristic of changing color and fluorescence by recognizing a change in the external environment.

The present invention also provides a method of using a polydiacetylene conjugated polymer as an ink for an ink jet printer.

In one embodiment of the present invention, a method of using the polydiacetylene conjugated polymer of the present invention as an inkjet printer ink includes a diacetylene monomer represented by Formula 1, an organic solvent, a water-soluble organic solvent, water, and a surfactant. The oil-in-water microemulsion for ink may be applied to an inkjet printer to print a predetermined image on a substrate.

As described above, a method of printing a predetermined image on a substrate by applying an oil-in-water microemulsion for ink containing a diacetylene monomer represented by Chemical Formula 1, an organic solvent, a water-soluble organic solvent, water, and a surfactant to an inkjet printer is described above. It can be carried out in the same manner as the printing method using the polydiacetylene conjugated polymer of the present invention.

When using the method of using the polydiacetylene conjugated polymer of the present invention as an inkjet printer ink, it is applied to articles requiring anti-counterfeiting, for example, documents, bills, tickets, expensive brand emblems, and the like. To prevent forgery.

The present invention provides oil-in-water microemulsions containing diacetylene with changes in color and fluorescence by recognizing changes in the external environment, since the oil-in-water microemulsions containing diacetylene are used as ink in an inkjet printer. By exhibiting suitable physical properties, it is expected to be used as an anti-counterfeiting ink in the manufacture of various articles such as documents, bills, tickets, and expensive brand emblems.

Hereinafter, preferred examples are provided to aid the understanding of the present invention, but the following examples are merely for exemplifying the present invention, and it will be apparent to those skilled in the art that various changes and modifications can be made within the scope and spirit of the present invention. It is natural that such variations and modifications fall within the scope of the appended claims.

< Example >

Example  One: Diacetylene  contain Of microemulsion  Produce

2% by weight of 10,12-pentacosadinoic acid based on the total weight of the microemulsion was dissolved in 24% by weight of toluene based on the total weight of the microemulsion. 10% by weight sodium dodecyl sulfate based on the total weight of the microemulsion was dissolved in a mixture of 26.4% by weight water and 37.6% by weight 1-propanol based on the total weight of the microemulsion and then 10,12- A microemulsion was prepared by mixing with toluene in which pentacosadinoic acid was dissolved.

Example  2: Diacetylene  contain Of microemulsion  Produce

Based on the total weight of the microemulsion, 2% by weight of 8,10-heneicosadinoic acid was dissolved in 24% by weight of toluene based on the total weight of the microemulsion, An emulsion was prepared.

Example  3: Diacetylene  contain Of microemulsion  Produce

Microemulsion was carried out in the same manner as in Example 1 except that 2% by weight of 10,12-tricosadinoic acid based on the total weight of the microemulsion was dissolved in 24% by weight of toluene based on the total weight of the microemulsion. Was prepared.

Example  4: Diacetylene  contain Of microemulsion  print

After the microemulsion prepared in Example 1 was injected into an inkjet cartridge, an image was printed on a plain paper using an inkjet printer. The printed image was exposed to ultraviolet light at 254 nm for 5 minutes (1 mW / cm ² ) to print an image (English PC) containing blue polydiacetylene, which is shown in FIG. 2. As shown in (a) of FIG. 2, the printed image was found to have excellent clarity and intensity of blue, and when heat is applied, it can be seen that the color changes from blue to red, and is shown in (b) of FIG. As can be seen that the printed image is fluorescence when heat is applied under the fluorescent lamp.

Example  5: Diacetylene  contain Of microemulsion  print

An image (English letter HC) was printed in the same manner as in Example 4 except that the microemulsion prepared in Example 2 was used, which is shown in FIG. 3. As shown in (a) of FIG. 3, the printed image was found to have excellent clarity and intensity of blue, and when heat is applied, it can be seen that the color changes from blue to red, and is shown in (b) of FIG. As can be seen that the printed image is fluorescence when heat is applied under the fluorescent lamp.

Example  6: Diacetylene  contain Of microemulsion  print

An image (English letter TC) was printed in the same manner as in Example 4 except that the microemulsion prepared in Example 3 was used, which is shown in FIG. 4. As shown in (a) of FIG. 4, the printed image was found to have excellent clarity and intensity of blue, and when heat is applied, it can be seen that the color changes from blue to red, and is shown in (b) of FIG. 4. As can be seen that the printed image is fluorescence when heat is applied under the fluorescent lamp.

Example  7: Diacetylene  contain Of microemulsion  print

In the same manner as in Example 4 using the microemulsion prepared in Example 1 to print the English characters as shown in FIG. As a result of visual observation of the printed image, it was found that the sharpness of the image and the intensity of blue color were excellent. As shown in FIG. 5, the blue image expressed by the polymerization of the polydiacetylene conjugated polymer was visually observed in the post-printing exposure process. Afterwards, it can be seen that the portion where the heat is locally applied to the center of the printed alphabet is changed from blue to red.

1 is a view schematically showing a process of a printing method using a polydiacetylene conjugated polymer of the present invention.

FIG. 2 is a view illustrating a state in which the microemulsion prepared in Example 1 according to Example 4 of the present invention is injected into an inkjet cartridge and then heat is applied to an image printed on plain paper using an inkjet printer. And (b) of FIG. 2 which shows the state after heat is applied to the image under a fluorescent lamp.

3 is a view showing a state in which heat is applied to an image printed on plain paper using an inkjet printer after injecting the microemulsion prepared in Example 2 according to Example 5 of the present invention. ) And (b) of FIG. 3 which shows the state after heat is applied to the image under a fluorescent lamp.

4 is a view illustrating a state in which the microemulsion prepared in Example 3 according to Example 6 of the present invention is injected into an inkjet cartridge, and then heat is applied to an image printed on a plain paper using an inkjet printer. And (b) of FIG. 4 showing the state after applying heat to the image under a fluorescent lamp.

FIG. 5 is a view illustrating an image printed on a plain paper using an inkjet printer after injecting the microemulsion prepared in Example 1 into an inkjet cartridge according to Example 7 of the present invention, an image of which is exposed to light, and an image and heat applied thereto. It is a figure which shows the image of a state.

Explanation of symbols on the main parts of the drawings

100: cartridge # 110: microemulsion

120: nozzle # 130: diacetylene monomer

131: surfactant 132: water-soluble organic solvent

140: polydiacetylene conjugated polymer 160: substrate

Claims (18)

As a diacetylene-containing microemulsion used as ink in an inkjet printer, Oil-in-water microemulsions for inks comprising a diacetylene monomer represented by Formula 1 below, an organic solvent, a water-soluble organic solvent, water and a surfactant: [Formula 1]

In Chemical Formula 1, d + g is 0,1 or 2, e + f is an integer from 2 to 50, e and f are integers greater than 1, A and B are methyl group, amine group, carboxyl group, hydroxy group, maleimide group, biotin group, N-hydroxysuccinimide group, benzoic acid group or activated ester group, L ₁ and L ₂ are the same as or different from each other and are an alkyl group having 2 or more carbon atoms, at least one ethylene oxide group, an amine group, an amide group, an ester group or a carbonyl group. The method according to claim 1, The oil-in-water microemulsion for ink is based on the total weight of the microemulsion, 1-10% by weight of a diacetylene monomer, 10-40% by weight of an organic solvent, 20-45% by weight of a water-soluble organic solvent, 15-40% by weight of water and a surfactant. Diacetylene-containing microemulsion comprising 7 to 30% by weight. The method according to claim 1, The diacetylene monomers are 10,12-pentacosadinoic acid, 5,7-eicosadinoic acid, 8,10-heneicosadinoic acid, 4,6-heptadecardinoic acid, 10,12-tricosadinoic acid And a diacetylene-containing microemulsion, characterized in that one or two or more mixtures selected from the group consisting of 10,12-docosadiindioic acid. The method according to claim 1, The surfactant is an anionic surfactant or cetyltrimethylammonium bromide, cetyltrimethylammonium chloride, dodecyltrimethylammonium bromide, dodecyltrimethylammonium chloride and dimethyl including sodium dodecyl sulfate, sodium 1-dodecanesulfonate and sodium laurate A diacetylene-containing microemulsion, characterized in that it is a cationic surfactant comprising distearylammonium chloride. The method according to claim 1, The organic solvent is a diacetylene-containing microemulsion, characterized in that selected from the group consisting of toluene, ethyl acetate, chloroform and dichloromethane. The method according to claim 1, Diacetylene-containing microemulsion, characterized in that the water-soluble organic solvent is ethanol or n-propanol. A method for producing a die acetylene-containing microemulsion used as ink in an inkjet printer, Preparing a first mixture by dissolving the diacetylene monomer represented by Formula 1 in an organic solvent; And Adding the first mixture to a second mixture of a surfactant, water and a water-soluble organic solvent; Method for producing a diacetylene-containing microemulsion comprising: [Formula 1]

In Chemical Formula 1, d + g is 0,1 or 2, e + f is an integer from 2 to 50, e and f are integers greater than 1, A and B are methyl group, amine group, carboxyl group, hydroxy group, maleimide group, biotin group, N-hydroxysuccinimide group, benzoic acid group or activated ester group, L ₁ and L ₂ are the same as or different from each other and are an alkyl group having 2 or more carbon atoms, at least one ethylene oxide group, an amine group, an amide group, an ester group or a carbonyl group. The method of claim 7, The diacetylene-containing microemulsion is based on the total weight of the microemulsion, 1 to 10% by weight of the diacetylene monomer, 10 to 40% by weight of the organic solvent, 20 to 45% by weight of the water-soluble organic solvent, 15 to 40% by weight of water and surfactant 7 A method for producing a diacetylene-containing microemulsion, characterized in that it comprises ˜30% by weight. The method of claim 7, The diacetylene monomers are 10,12-pentacosadinoic acid, 5,7-eicosadinoic acid, 8,10-heneicosadinoic acid, 4,6-heptadecardinoic acid, 10,12-tricosadinoic acid And 10,12-docosadiindioic acid, or a mixture of one or two or more selected from the group consisting of diacetylene-containing microemulsions. The method of claim 7, The organic solvent is a method for producing a diacetylene-containing microemulsion, characterized in that selected from the group consisting of toluene, ethyl acetate, chloroform and dichloromethane. The method of claim 7, The method of producing a diacetylene-containing microemulsion, characterized in that the water-soluble organic solvent is ethanol or n-propanol. Printing a predetermined image on a substrate by applying an oil-in-water microemulsion for ink comprising a diacetylene monomer represented by Formula 1, an organic solvent, a water-soluble organic solvent, water, and a surfactant to an inkjet printer; And A printing method using a polydiacetylene conjugated polymer comprising the step of polymerizing the diacetylene monomer by exposing the image printed on the substrate: [Formula 1]

In Chemical Formula 1, d + g is 0,1 or 2, e + f is an integer from 2 to 50, e and f are integers greater than 1, A and B are methyl group, amine group, carboxyl group, hydroxy group, maleimide group, biotin group, N-hydroxysuccinimide group, benzoic acid group or activated ester group, L ₁ and L ₂ are the same as or different from each other and are an alkyl group having 2 or more carbon atoms, at least one ethylene oxide group, an amine group, an amide group, an ester group or a carbonyl group. The method according to claim 12, The ink microemulsion is based on the total weight of the microemulsion, 1 to 10% by weight of the diacetylene monomer, 10 to 40% by weight of the organic solvent, 20 to 45% by weight of the water-soluble organic solvent, 15 to 40% by weight of the water and the surfactant 7 ~ A printing method using polydiacetylene conjugated polymer, characterized in that it comprises 30% by weight. An anti-counterfeiting article printed with an image according to the method of claim 12 or 13. The method according to claim 14, The anti-counterfeiting article is a document, banknote, ticket or brand emblem. A method of using polydiacetylene conjugated polymer as ink for an ink jet printer. 18. The method of claim 16, It comprises a step of printing a predetermined image on a substrate by applying a water-in-oil microemulsion for ink comprising a diacetylene monomer represented by the formula (1), an organic solvent, a water-soluble organic solvent, water and a surfactant to an inkjet printer A method of using a polydiacetylene conjugated polymer as an ink for an ink jet printer: [Formula 1]

In Chemical Formula 1, d + g is 0,1 or 2, e + f is an integer from 2 to 50, e and f are integers greater than 1, A and B are methyl group, amine group, carboxyl group, hydroxy group, maleimide group, biotin group, N-hydroxysuccinimide group, benzoic acid group or activated ester group, L ₁ and L ₂ are the same as or different from each other and are an alkyl group having 2 or more carbon atoms, at least one ethylene oxide group, an amine group, an amide group, an ester group or a carbonyl group. The method according to claim 17, The substrate is a method for use, characterized in that the anti-counterfeiting paper, film or cloth.

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