Anti-counterfeiting pigment, preparation method and application thereof

Abstract

The application belongs to the technical field of anti-counterfeiting, and particularly relates to an anti-counterfeiting pigment, a preparation method and application thereof. The application provides an anti-counterfeiting pigment, which comprises the following raw materials in parts by weight: 30-45 parts of nanocellulose suspension; 0.3-12 parts of color developer; 6-15 parts of color developing agent; 35-53 parts of emulsifying wax; 1.5-20 parts of polyethylene glycol; 12-25 parts of stearic acid; 2-15 parts of talc; and 5-10 parts of nanometer titanium dioxide, wherein the concentration of the nanocellulose suspension is 2-5%. The nanometer titanium dioxide and the nanocellulose suspension are added to the anti-counterfeiting pigment, and the nanometer titanium dioxide, the nanocellulose suspension, the color developer, the color developing agent, the emulsifying wax, the polyethylene glycol, the stearic acid and the talc are combined to prepare the pigment, which is added to anti-counterfeiting ink, so that the adhesion of the anti-counterfeiting ink and paper can be improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of anti-counterfeiting technology, and particularly relates to an anti-counterfeiting pigment and a preparation method and application thereof. BACKGROUND

[0002] The anti-counterfeiting ink refers to ink with anti-counterfeiting function, which is composed of color material, connecting material and ink additive, that is, special anti-counterfeiting material with special performance is added into the ink connecting material and processed by special process to form special printing ink.

[0003] The anti-counterfeiting ink can be divided into the following types according to principles: heat change color anti-counterfeiting ink, cold-induced color change anti-counterfeiting ink, magnetic anti-counterfeiting ink, fluorescent anti-counterfeiting ink and water color change anti-counterfeiting ink, etc. The heat change color anti-counterfeiting ink refers to temporary change or permanent change of the color of the mark under the condition of heat blowing.

[0004] However, the heat change color anti-counterfeiting ink needs to be subjected to anti-counterfeiting identification under the condition of heat blowing in the use process, which requires that the anti-counterfeiting ink and the paper have good adhesion. Therefore, it is necessary to develop an anti-counterfeiting ink with higher adhesion to the paper. SUMMARY

[0005] In order to solve the above technical problems, the present application provides an anti-counterfeiting pigment and a preparation method and application thereof, and the anti-counterfeiting ink and the paper prepared from the pigment have higher adhesion and can prevent the anti-counterfeiting ink from losing effect under the condition of heat blowing.

[0006] Therefore, the present application provides the following technical scheme,

[0007] In the first aspect, the present application provides an anti-counterfeiting pigment in the optional implementation, which comprises the following raw materials by weight: nanocellulose suspension 30-45 parts; color former 0.3-12 parts; color developer 6-15 parts; emulsifying wax 35-53 parts; polyethylene glycol 1.5-20 parts; stearic acid 12-25 parts; talc 2-15 parts; and, nanometer titanium dioxide 5-10 parts, wherein the concentration of the nanocellulose suspension is 2-5%.

[0008] In the present application, by adding nanometer titanium dioxide and nanocellulose suspension, the nanometer titanium dioxide and the nanocellulose suspension can cooperate with the color former, the color developer, the emulsifying wax, the polyethylene glycol, the stearic acid and the talc to be prepared into the pigment, which is added into the anti-counterfeiting ink to improve the adhesion of the anti-counterfeiting ink and the paper.

[0009] Preferably, the anti-counterfeiting pigment comprises nanocellulose suspension 40 parts with a concentration of 3%, color former 8 parts, color developer 10 parts, emulsifying wax 45 parts, polyethylene glycol 10 parts, stearic acid 18 parts, talc 10 parts and nanometer titanium dioxide 8 parts.

[0010] Further, the anti-counterfeiting pigment comprises 40 parts of nanocellulose suspension with a concentration of 3%, 8 parts of 2', 6'-bis (diethylamino) spiro [isobenzofuran-1, 9'-oxanthrene]-3-ketone, 10 parts of ferric nitrate, 45 parts of emulsifying wax, 10 parts of polyethylene glycol, 18 parts of stearic acid, 10 parts of talc and 8 parts of nanometer titanium dioxide.

[0011] Preferably, the color developer comprises one or more of 2', 6'-bis (diethylamino) spiro [isobenzofuran-1, 9'-oxanthrene]-3-ketone, 2-chloro-6'-diethylaminospiro [isobenzofuran-1, 9'-oxanthrene]-3-ketone or 3', 6'-diphenylamino-spiro [isobenzofuran-1, 9'-oxanthrene]-3-ketone. The color developer is a metal salt or a weak acid; the metal salt comprises one or more of ferric nitrate, ferric chloride, aluminum sulfate or aluminum chloride, and the weak acid comprises one or more of bisphenol A, boric acid, tartaric acid or oxalic acid.

[0012] In the present application, the color developer comprises but is not limited to 2', 6'-bis (diethylamino) spiro [isobenzofuran-1, 9'-oxanthrene]-3-ketone, 2-chloro-6'-diethylaminospiro [isobenzofuran-1, 9'-oxanthrene]-3-ketone or 3', 6'-diphenylamino-spiro [isobenzofuran-1, 9'-oxanthrene]-3-ketone, and can also be 3', 6'-dimethoxyspiro [isobenzofuran-1, 9'-oxanthrene]-3-ketone or 2'-anilino-6'-diethylamino-3'-methyl-spiro [isobenzofuran-1, 9'-oxanthrene]-3-ketone.

[0013] In a second aspect, the present application provides a preparation method of the anti-counterfeiting pigment in the optional embodiments, and has the characteristics that the preparation method comprises the following steps:

[0014] S1: according to the weight parts, nanometer titanium dioxide powder is added to the nanocellulose suspension and stirred to obtain a precursor solution;

[0015] S2: according to the weight parts, the emulsifying wax is melted and then added to the precursor solution, followed by adding polyethylene glycol, talc and stearic acid and stirring, and finally adding the color developer and the color developer in sequence and stirring again to obtain the anti-counterfeiting pigment.

[0016] The preparation method of the anti-counterfeiting pigment is simple, fast and suitable for large-scale promotion.

[0017] Preferably, in step S1, the stirring time is 3-5 hours. In step S2, the melting temperature is 95-105℃; the stirring time is 30-60 min. The second stirring time is 30-60 min, and / or the mixed solution is heated when stirring for the second time, and the heating temperature is 60-80℃.

[0018] In the present application, by heating during secondary stirring, the raw materials can be further mixed more densely, thereby improving the adhesion of the anti-forgery ink and paper.

[0019] In a third aspect, the present application provides, in an optional embodiment, an anti-forgery ink comprising the anti-forgery pigment or the anti-forgery pigment prepared by the method described above.

[0020] In a fourth aspect, the present application provides, in an optional embodiment, an anti-forgery paper printed by the anti-forgery ink described above.

[0021] Compared with the prior art, the present application has one or more of the following beneficial effects:

[0022] 1. By adding nano-titanium dioxide and nano-cellulose suspension, the present application can cooperate with the color former, color developer, emulsified wax, polyethylene glycol, stearic acid and talc, and the prepared pigment can be added to the anti-forgery ink, thereby improving the adhesion of the anti-forgery ink and paper.

[0023] 2. The method for preparing the anti-forgery pigment is simple, fast in operation and suitable for large-scale promotion.

[0024] 3. By heating during secondary stirring, the present application can further mix the raw materials more densely, thereby improving the adhesion of the anti-forgery ink and paper. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The figure is a flowchart for preparing the anti-forgery pigment according to the present application. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application is further described in detail below with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0027] The color former 0.3-12 parts, the color developer 6-15 parts, the emulsified wax 35-53 parts, the polyethylene glycol 1.5-20 parts, the stearic acid 12-25 parts and the talc 2-15 parts are the raw materials of the wax pencil. The inventor found that they can play the function of anti-forgery when added to the ink, but if they are directly added to the ink for printing, the adhesion to the paper is poor. Therefore, the inventor added nano-cellulose suspension and nano-titanium dioxide to the pigment, thereby improving the adhesion of the ink to the paper.

[0028] In the specific embodiment of the present application, the chromogenic agent comprises one or more of 2'-chloro-6'-diethylamino[isobenzofuran-1,9'-xanthene]-3-one, 3',6'-dimethoxyspiro[isobenzofuran-1,9'-xanthene]-3-one or 3',6'-bis(biphenylamino)spiro[isobenzofuran-1,9'-xanthene]-3-one. The selection of the chromogenic agent can be any two or more combinations of 2'-chloro-6'-diethylamino[isobenzofuran-1,9'-xanthene]-3-one, 3',6'-dimethoxyspiro[isobenzofuran-1,9'-xanthene]-3-one or 3',6'-bis(biphenylamino)spiro[isobenzofuran-1,9'-xanthene]-3-one, and the mass ratio of any two combinations of the chromogenic agent can be 1:0.5-2, and the present application is not limited thereto.

[0029] In the specific embodiment of the present application, the color developing agent is a metal salt or a weak acid, the metal salt comprises one or more of ferric nitrate, ferric chloride, aluminum sulfate or aluminum chloride; the selection of the metal salt can be any two or more combinations of ferric nitrate, ferric chloride, aluminum sulfate or aluminum chloride, and the mass ratio of any two combinations of the metal salt can be 1:0.5-2, and the present application is not limited thereto. The weak acid comprises one or more of bisphenol A, boric acid, tartaric acid or oxalic acid; the selection of the weak acid can be any two or more combinations of bisphenol A, boric acid, tartaric acid or oxalic acid, and the mass ratio of any two combinations of the weak acid can be 1:0.5-2, and the present application is not limited thereto.

[0030] 2',6'-bis(diethylamino)spiro[isobenzofuran-1,9'-xanthene]-3-one, hereinafter referred to as green chromogenic agent;

[0031] 2-chloro-6'-diethylaminospiro[isobenzofuran-1,9'-xanthene]-3-one, hereinafter referred to as red chromogenic agent;

[0032] 3',6'-bis(biphenylamino)spiro[isobenzofuran-1,9'-xanthene]-3-one, hereinafter referred to as blue chromogenic agent.

[0033] The scheme of the present application is illustrated below by specific examples.

[0034] Example 1

[0035] The present example provides a kind of anti-fake pigment, comprising the following weight parts of raw materials:

[0036] 40kg of 3% concentration of nanocellulose suspension, 8kg green chromogenic agent, 10kg ferric nitrate, 45kg emulsifying wax, 10kg polyethylene glycol, 18kg stearic acid, 10kg talc and 8kg nanometer titanium dioxide.

[0037] The embodiment also provides a preparation method of the anti-counterfeiting pigment, comprising the following steps:

[0038] Step one: 8 kg of nano-titanium dioxide powder is added into 40 kg of nanocellulose suspension with a concentration of 3% and stirred for 4 hours to obtain a precursor solution.

[0039] Step two: 45 kg of emulsified wax is melted at 100°C and then added into the precursor solution, followed by addition of 10 kg of polyethylene glycol, 10 kg of talcum powder and 18 kg of stearic acid, stirring for 40 min, and finally, 10 kg of ferric nitrate and 8 kg of 2'-chloro-6'-diethylamino[isobenzofuran-1,9'-oxanthrene]-3-ketone are added in sequence, stirring for 40 min at 70°C to obtain the anti-counterfeiting pigment.

[0040] Example 2-9

[0041] Example 2-9 provides an anti-counterfeiting pigment, raw material components and weights of which are shown in Table 1, and the preparation method is the same as that of Example 1.

[0042] Table 1 Raw material components and weights of the anti-counterfeiting pigment in Example 2-9

[0043]

[0044] In the table, (-) represents that the material is not contained.

[0045] Comparative Example 1

[0046] The comparative example provides an anti-counterfeiting pigment, which comprises the following raw materials by weight:

[0047] 8 kg of green colorant, 10 kg of ferric nitrate, 45 kg of emulsified wax, 10 kg of polyethylene glycol, 18 kg of stearic acid and 10 kg of talcum powder.

[0048] The comparative example also provides a preparation method of the anti-counterfeiting pigment, comprising the following steps:

[0049] After 45 kg of emulsified wax is melted at 100°C, 10 kg of polyethylene glycol, 10 kg of talcum powder and 18 kg of stearic acid are added and stirred for 40 min, and finally, 10 kg of ferric nitrate and 8 kg of 2'-chloro-6'-diethylamino[isobenzofuran-1,9'-oxanthrene]-3-ketone are added in sequence, stirring for 40 min at 70°C to obtain the anti-counterfeiting pigment.

[0050] Comparative Example 2

[0051] The comparative example provides an anti-counterfeiting pigment, which comprises the following raw materials by weight:

[0052] 8 kg green colorant, 10 kg ferric nitrate, 45 kg emulsified wax, 10 kg polyethylene glycol, 18 kg stearic acid, 10 kg talcum powder and 8 kg nano titanium dioxide.

[0053] The present comparative example also provides a preparation method of the anti-counterfeiting pigment, comprising the following steps:

[0054] After 45 kg of emulsified wax is melted at 100°C, 8 kg of nano titanium dioxide is added, followed by 10 kg of polyethylene glycol, 10 kg of talcum powder and 18 kg of stearic acid, and stirred for 40 min, and finally 10 kg of ferric nitrate and 8 kg of 2'-chloro-6'-diethylamino[isobenzofuran-1,9'-anthracene]-3-one are added in sequence, and stirred at 70°C for 40 min to obtain the anti-counterfeiting pigment.

[0055] Comparative Example 3

[0056] The present comparative example provides an anti-counterfeiting pigment, comprising the following raw materials by weight:

[0057] 40 kg of nano cellulose suspension with a concentration of 3%, 8 kg of green colorant, 10 kg of ferric nitrate, 45 kg of emulsified wax, 10 kg of polyethylene glycol, 18 kg of stearic acid and 10 kg of talcum powder.

[0058] The present comparative example also provides a preparation method of the anti-counterfeiting pigment, comprising the following steps:

[0059] After 45 kg of emulsified wax is melted at 100°C, it is added to 40 kg of nano cellulose suspension with a concentration of 3%, followed by 10 kg of polyethylene glycol, 10 kg of talcum powder and 18 kg of stearic acid, and stirred for 40 min, and finally 10 kg of ferric nitrate and 8 kg of 2'-chloro-6'-diethylamino[isobenzofuran-1,9'-anthracene]-3-one are added in sequence, and stirred at 70°C for 40 min to obtain the anti-counterfeiting pigment.

[0060] Comparative Example 4

[0061] The present comparative example provides an anti-counterfeiting pigment, which is different from Example 1 in that the concentration of the nano cellulose suspension is 2%. The remaining raw materials and the preparation method are the same as those of Example 1.

[0062] Comparative Example 5

[0063] The present comparative example provides an anti-counterfeiting pigment, which is different from Example 1 in that the concentration of the nano cellulose suspension is 6%. The remaining raw materials and the preparation method are the same as those of Example 1.

[0064] Comparative Example 6

[0065] The anti-counterfeiting pigment provided by the present comparative example is the same as that of Example 1, and the difference in the preparation method is that no heating is performed during the secondary stirring.

[0066] Experimental example

[0067] After the anti-counterfeiting pigments prepared in Example 1 and Comparative Examples 1-6 are prepared into anti-counterfeiting inks, the adhesion of the anti-counterfeiting inks is detected, and the detection is performed according to the standard of GB / T 13217.7-2023. The detection results are shown in Table 2.

[0068]

[0069] As can be seen from Table 2, by adding the nanocellulose suspension and nanometer titanium dioxide into the pigment, the adhesion of the ink to the paper can be improved. By heating during the secondary stirring, the raw materials can be further mixed to be more compact, thereby improving the adhesion of the anti-counterfeiting ink to the paper.

[0070] Although the principles of the present application have been described in detail above in connection with the preferred embodiments of the present application, those skilled in the art should understand that the above-mentioned embodiments are only illustrative implementations of the present application, and are not a limitation on the scope of the present application. The details in the embodiments do not constitute a limitation on the scope of the present application. Any equivalent transformation, simple replacement, etc. based on the technical solutions of the present application, without departing from the spirit and scope of the present application, falls within the protection scope of the present application.

Claims

1. An anti-counterfeiting pigment, characterized in that: It includes the following raw materials in parts by weight: 30-45 parts of nanocellulose suspension; 0.3-12 parts of coloring agent; 6-15 parts of developer; 35-53 parts of emulsifying wax; 1.5-20 parts of polyethylene glycol; 12-25 parts of stearic acid; 2-15 parts of talc; and 5-10 parts of nano titanium dioxide Wherein, the concentration of the nanocellulose suspension is 2-5%; The coloring agent is one of 2',6'-bis(diethylamino)spiro[isobenzofuran-1,9'-anthracene oxide]-3-one, 2-chloro-6'-diethylaminospiro[isobenzofuran-1,9'-anthracene oxide]-3-one or 3',6'-bis(diphenylamino)spiro[isobenzofuran-1,9'-anthracene oxide]-3-one; The color developer is one of ferric nitrate, aluminum sulfate, boric acid and oxalic acid.

2. The anti-counterfeiting pigment according to claim 1, characterized in that: The anti-counterfeiting pigment includes 40 parts of nanocellulose suspension with a concentration of 3%, 8 parts of colorant, 10 parts of developer, 45 parts of emulsifying wax, 10 parts of polyethylene glycol, 18 parts of stearic acid, 10 parts of talc and 8 parts of nano titanium dioxide.

3. The anti-counterfeiting pigment according to claim 1, characterized in that: The anti-counterfeiting pigment includes 40 parts of a nanocellulose suspension with a concentration of 3%, 8 parts of 2',6'-bis(diethylamino)spiro[isobenzofuran-1,9'-anthracene oxide]-3-one, 10 parts of ferric nitrate, 45 parts of emulsifying wax, 10 parts of polyethylene glycol, 18 parts of stearic acid, 10 parts of talc and 8 parts of nano titanium dioxide.

4. A method for preparing the anti-counterfeiting pigment according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1: adding nano-titanium dioxide powder to the nanocellulose suspension according to parts by weight and stirring to obtain a precursor solution; S2: After melting the emulsified wax according to weight, add it to the precursor solution, then add polyethylene glycol, talc and stearic acid and stir, and finally add the color developer and the color forming agent in sequence and stir again to obtain the anti-counterfeiting pigment.

5. The method for preparing the anti-counterfeiting pigment according to claim 4, characterized in that: In step S1, the stirring time is 3-5 hours.

6. The method for preparing the anti-counterfeiting pigment according to claim 4, characterized in that: In step S2, the melting temperature is 95-105°C; and / or, The stirring time is 30-60 min; and / or, The secondary stirring time is 30-60 min, and / or, During the secondary stirring, the mixed solution is heated at a temperature of 60-80°C.

7. An anti-counterfeiting ink, characterized in that: The anti-counterfeiting pigment comprises the anti-counterfeiting pigment according to any one of claims 1 to 3. 8.An anti-counterfeiting paper, characterized in that: Printed with the anti-counterfeiting ink according to claim 7.

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