Photosensitive and temperature-sensitive color-changing anti-counterfeiting ink and preparation method thereof

Abstract

The present invention relates to the technical field of packaging and printing anti-counterfeiting inks, and in particular to a photosensitive and thermosensitive color-changing anti-counterfeiting ink and a preparation method thereof. A photosensitive and thermosensitive color-changing anti-counterfeiting ink comprises, by weight, 60-65 parts of a binder; 15-18 parts of an organic colorant; 2-5 parts of an organic solvent; and 16-20 parts of an anti-counterfeiting material. The photosensitive and thermosensitive color-changing anti-counterfeiting ink of the present invention displays a printed color at room temperature, and the printed color changes to purple-red after being irradiated with ultraviolet light; the printed color changes to colorless after being heated to a certain temperature, and changes to purple-red after being irradiated with ultraviolet light; and slowly restores the original printed color after returning to room temperature, and has a good anti-counterfeiting effect.

Description

Technical Field

[0001] The invention relates to the technical field of packaging printing anti-counterfeiting ink, and in particular to a photosensitive and temperature-sensitive color-changing anti-counterfeiting ink and a preparation method thereof. Background Art

[0002] Anti-counterfeiting ink refers to a special printing ink made by adding materials that can change color, hardness and other properties under certain conditions to the ink raw materials, and evenly mixing them with other additives. Anti-counterfeiting ink printing is simple to operate, has good concealment, bright colors, convenient inspection (even hand temperature can change color), and strong reproducibility. Intelligent machine-readable (machine expert recognition) anti-counterfeiting ink is the preferred anti-counterfeiting technology for banknotes, tickets and trademarks in various countries due to its advantages such as complex detection, strong reproducibility and diverse color changes. With the improvement of science and technology, some illegal counterfeiters can also imitate the effects of anti-counterfeiting inks. Therefore, anti-counterfeiting inks that only rely on visual inspection or touch to distinguish authenticity are no longer able to meet the anti-counterfeiting needs of today's products. Therefore, the research and development of anti-counterfeiting inks with multiple anti-counterfeiting effects that have both anti-counterfeiting patterns that can be observed by visual inspection and can be distinguished by touch is imperative.

[0003] At present, thermochromic ink has an application market. Thermochromic ink can be used in screen printing. The product design aims to change color in high and low temperature environments. It is mostly used in a series of products that sense human body temperature. It can also be used for anti-counterfeiting design. However, the current thermochromic anti-counterfeiting ink has the problem of too single detection method and low anti-counterfeiting recognition. Summary of the invention

[0004] The object of the present invention is to provide a photosensitive and temperature-sensitive color-changing anti-counterfeiting ink, which comprises, by weight:

[0005] 60-65 parts of binder;

[0006] 15-18 parts of organic pigment;

[0007] 2-5 parts of organic solvent;

[0008] 16-20 copies of anti-counterfeiting materials.

[0009] The photosensitive and thermosensitive color-changing anti-counterfeiting ink of the present invention displays printing color at room temperature, and the printing color changes to purple-red after being irradiated with ultraviolet light; the printing color changes to colorless after being heated to a certain temperature, and changes to purple-red after being irradiated with ultraviolet light; and slowly restores to the original printing color after returning to room temperature, thereby having a good anti-counterfeiting effect.

[0010] Preferably, at least one of the following technical features is included:

[0011] A1) the binder is selected from one or more of natural rosin resin, polyvinyl alcohol, epoxy resin, acrylate and rubber resin;

[0012] A2) The organic pigment is selected from photosensitive color-changing capsules and temperature-sensitive color-changing capsules;

[0013] A3) The organic solvent is selected from n-propyl ester or ethyl ester.

[0014] Preferably, the linking material comprises, by weight,

[0015] 10-15 parts of natural rosin resin;

[0016] Polyvinyl alcohol 5-10 parts;

[0017] Epoxy resin 5-8 parts;

[0018] Acrylate 25-30 parts;

[0019] Rubber resin 5-8 parts.

[0020] Preferably, at least one of the following technical features is included:

[0021] B1) the ink comprises 1-3 parts of filler by weight;

[0022] B2) The ink comprises 2-5 parts of an auxiliary agent by weight.

[0023] Preferably, the filler is pearl powder.

[0024] Preferably, the particle size of the pearlescent powder is 4-8 μm.

[0025] Preferably, the auxiliary agent is selected from one or more of a defoaming agent, a leveling agent, and a wetting and dispersing agent.

[0026] Preferably, the anti-counterfeiting material comprises, by weight,

[0027] 8 to 12 copies of photosensitive anti-counterfeiting materials;

[0028] 6 to 10 pieces of temperature-sensitive anti-counterfeiting materials.

[0029] Preferably, the temperature-sensitive anti-counterfeiting material comprises a shell material, a dye and a fatty acid.

[0030] The second aspect of the present invention provides a method for preparing a photosensitive and temperature-sensitive color-changing anti-counterfeiting ink, comprising the following steps:

[0031] 1) Grinding the binder material to obtain a pre-prepared material;

[0032] 2) mixing the pre-prepared material obtained in step 1) with an organic solvent, and performing a first stirring to obtain a first mixed material;

[0033] 3) mixing the first mixed material obtained in step 2) with the organic colorant, anti-counterfeiting material, filler and additive, and performing a second stirring to obtain a second mixed material;

[0034] 4) rolling the second mixed material obtained in step 3) to obtain the photosensitive and temperature-sensitive color-changing anti-counterfeiting ink.

[0035] Preferably, at least one of the following technical features is included:

[0036] 21) In step 2), the first stirring speed is 150-180 rpm;

[0037] 22) In step 2), the first stirring time is 20-30 minutes;

[0038] 31) In step 3), the second stirring speed is 180-200 rpm;

[0039] 32) In step 3), the second stirring time is 20 minutes;

[0040] 33) In step 3), during the second stirring, fillers and additives are also added;

[0041] 41) In step 4), the rolling temperature is 30-35°C;

[0042] 42) In step 4), the rolling pressure is 35~45Pa.

[0043] The present invention has the following beneficial technical effects:

[0044] 1) The photosensitive and thermosensitive color-changing anti-counterfeiting ink of the present invention combines thermosensitive and photosensitive anti-counterfeiting materials in the ink, solving the problem that thermosensitive and photosensitive anti-counterfeiting technologies cannot be used together and interfere with each other's colors, and realizing the fusion of a high proportion of raw materials and base ink.

[0045] 2) The photosensitive and thermosensitive color-changing anti-counterfeiting ink of the present invention displays the printing color at room temperature, and the printing color changes to purple-red after being irradiated with ultraviolet light; the printing color changes to colorless after being heated to a certain temperature, and changes to purple-red after being irradiated with ultraviolet light; after returning to room temperature, the original printing color is slowly restored, and it has a good anti-counterfeiting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 The present invention is a flow chart of a method for preparing a photosensitive and temperature-sensitive color-changing anti-counterfeiting ink.

[0047] Figure 2 This is a diagram of the experimental effect under normal temperature conditions in Example 1.

[0048] Figure 3 This is a diagram of the experimental effect under heating conditions in Example 1.

[0049] Figure 4 This is a diagram of the experimental effect under ultraviolet irradiation in Example 1. DETAILED DESCRIPTION

[0050] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0051] It should be noted that the process equipment or devices not specifically specified in the following embodiments are all conventional equipment or devices in the art.

[0052] A photosensitive and temperature-sensitive color-changing anti-counterfeiting ink, comprising, by weight:

[0053] 60-65 parts of binder;

[0054] 15-18 parts of organic pigment;

[0055] 2-5 parts of organic solvent;

[0056] 16-20 copies of anti-counterfeiting materials.

[0057] The photosensitive and thermosensitive color-changing anti-counterfeiting ink of the present invention displays printing color at room temperature, and the printing color changes to purple-red after being irradiated with ultraviolet light; the printing color changes to colorless after being heated to a certain temperature, and changes to purple-red after being irradiated with ultraviolet light; and slowly restores to the original printing color after returning to room temperature, thereby having a good anti-counterfeiting effect.

[0058] In a preferred embodiment, at least one of the following technical features is included:

[0059] A1) the binder is selected from one or more of natural rosin resin, polyvinyl alcohol, epoxy resin, acrylate and rubber resin;

[0060] A2) The organic pigment is selected from photosensitive color-changing capsules and temperature-sensitive color-changing capsules;

[0061] A3) The organic solvent is selected from n-propyl ester or ethyl ester, for example, it can be Hanghua EX-P TRANS.WT.700 diluent and thinner.

[0062] In a preferred embodiment, the linking material comprises, by weight,

[0063] 10-15 parts of natural rosin resin;

[0064] Polyvinyl alcohol 5-10 parts;

[0065] Epoxy resin 5-8 parts;

[0066] Acrylate 25-30 parts;

[0067] 5~8 parts of rubber resin.

[0068] In a preferred embodiment, at least one of the following technical features is included:

[0069] B1) the ink comprises 1-3 parts of filler;

[0070] B2) The ink comprises 2-5 parts of an auxiliary agent.

[0071] In a preferred embodiment, the filler is pearl powder.

[0072] In a preferred embodiment, the particle size of the pearlescent powder is 4-8 μm.

[0073] In a preferred embodiment, the auxiliary agent is selected from one or more of a defoamer, a leveling agent, and a wetting and dispersing agent. The defoamer is polysiloxane or an organosilicon compound, the leveling agent is polysiloxane, and the wetting and dispersing agent is a polymer carboxylic acid or a mixture of a polymer carboxylic acid and polysiloxane.

[0074] In a preferred embodiment, the anti-counterfeiting material comprises, by weight,

[0075] 8 to 12 copies of photosensitive anti-counterfeiting materials;

[0076] 6 to 10 pieces of temperature-sensitive anti-counterfeiting materials.

[0077] In a preferred embodiment, B1) the photosensitive anti-counterfeiting material comprises a shell material and a fatty acid, and the shell material is a shell material (68002-20-0);

[0078] B2) The temperature-sensitive anti-counterfeiting material comprises a shell material, a dye and a fatty acid, wherein the shell material is a shell material (68002-20-0); and the dye is a dye (42228-32-0).

[0079] like Figure 1 As shown, a method for preparing a photosensitive and temperature-sensitive color-changing anti-counterfeiting ink in the present invention comprises the following steps:

[0080] 1) According to the preset percentage, weigh the corresponding binder, organic colorant, organic solvent and anti-counterfeiting material to obtain the preparation material;

[0081] 2) putting the connecting material in step 1) into a grinder for grinding to obtain a pre-prepared material;

[0082] 3) putting the pre-prepared material obtained in step 2) and the organic solvent into a stirring barrel and mixing them, performing a first stirring, wherein the first stirring speed is 150-180 rpm, the first stirring time is 20-30 minutes, stirring until uniform, and obtaining a first mixed material;

[0083] 4) Mixing the first mixed material obtained in step 3) with the organic colorant, anti-counterfeiting material, filler and additive, and performing a second stirring, wherein the second stirring speed is 180-200 rpm, the second stirring time is 20 minutes, and stirring until uniform, to obtain a second mixed material;

[0084] 5) The second mixed material obtained in step 4) is rolled using a three-roll mill to obtain the photosensitive and temperature-sensitive color-changing anti-counterfeiting ink, wherein the rolling temperature is 30-35° C. and the rolling pressure is 35-45 Pa. Example 1

[0085] 1) Grinding 15 parts by weight of natural rosin resin, 10 parts by weight of polyvinyl alcohol, 7 parts by weight of epoxy resin, 30 parts by weight of binder acrylate, and 3 parts by weight of rubber resin to obtain a pre-prepared material;

[0086] 2) mixing the pre-prepared material obtained in step 1) with 3 parts by weight of an organic solvent, n-propyl ester, and performing a first stirring to obtain a first mixed material;

[0087] 3) The first mixture obtained in step 2) is mixed with 10 parts by weight of photosensitive color-changing capsules (Microdot Company), 8 parts by weight of temperature-sensitive color-changing capsules (Microdot Company), 9 parts by weight of photosensitive anti-counterfeiting materials (Microdot Company), and 5 parts by weight of temperature-sensitive anti-counterfeiting materials (Microdot Company), and a second stirring is performed to obtain a second mixture;

[0088] 4) The second mixed material obtained in step 3) is rolled to obtain No. 1 photosensitive and temperature-sensitive color-changing anti-counterfeiting ink.

[0089] like Figure 2-4 As shown in the figure, the printing color of the product printed with this ink is displayed at room temperature, and the printing color turns purple-red after being irradiated with ultraviolet light. After heating to a certain temperature, the printing color becomes colorless, and turns purple-red after being irradiated with ultraviolet light. After returning to room temperature, it slowly returns to the original printing color, which has a good anti-counterfeiting effect. Example 2

[0090] Grind 15 parts by weight of natural rosin resin, 6 parts by weight of polyvinyl alcohol, 5 parts by weight of epoxy resin, 30 parts by weight of binder acrylate, and 3 parts by weight of rubber resin to obtain a pre-prepared material;

[0091] The pre-prepared material obtained in step 1) is mixed with 5 parts by weight of an organic solvent, n-propyl ester, and subjected to a first stirring to obtain a first mixed material;

[0092] The first mixture obtained in step 2) is mixed with 12 parts by weight of photosensitive color-changing capsules (Micropoint Company), 8 parts by weight of thermosensitive color-changing capsules (Micropoint Company), 9 parts by weight of photosensitive anti-counterfeiting materials (Micropoint Company), and 7 parts by weight of thermosensitive anti-counterfeiting materials (Micropoint Company), and a second stirring is performed to obtain a second mixture;

[0093] The second mixed material obtained in step 3) is rolled to obtain No. 2 photosensitive and temperature-sensitive color-changing anti-counterfeiting ink. Example 3

[0094] 1) Grinding 10 parts by weight of natural rosin resin, 8 parts by weight of polyvinyl alcohol, 5 parts by weight of epoxy resin, and 30 parts by weight of a binder acrylate to obtain a pre-prepared material;

[0095] 2) mixing the pre-prepared material obtained in step 1) with 5 parts by weight of an organic solvent, n-propyl ester, and performing a first stirring to obtain a first mixed material;

[0096] 3) The first mixture obtained in step 2) is mixed with 12 parts by weight of photosensitive color-changing capsules (Micropoint Company), 6 parts by weight of temperature-sensitive color-changing capsules (Micropoint Company), 11 parts by weight of photosensitive anti-counterfeiting materials (Micropoint Company), 9 parts by weight of temperature-sensitive anti-counterfeiting materials (Micropoint Company), 3 parts by weight of pearlescent powder and 1 part by weight of polysiloxane, and a second stirring is performed to obtain a second mixture;

[0097] 4) The second mixed material obtained in step 3) is rolled to obtain No. 3 photosensitive and temperature-sensitive color-changing anti-counterfeiting ink. Example 4

[0098] Grind 10 parts by weight of natural rosin resin, 8 parts by weight of polyvinyl alcohol, 6 parts by weight of epoxy resin, and 30 parts by weight of acrylic acid ester as a binder to obtain a pre-prepared material;

[0099] The pre-prepared material obtained in step 1) is mixed with 2 parts by weight of an organic solvent, n-propyl ester, and subjected to a first stirring to obtain a first mixed material;

[0100] The first mixture obtained in step 2) is mixed with 12 parts by weight of photosensitive color-changing capsules (Micropoint Company), 8 parts by weight of temperature-sensitive color-changing capsules (Micropoint Company), 10 parts by weight of photosensitive anti-counterfeiting materials (Micropoint Company), 10 parts by weight of temperature-sensitive anti-counterfeiting materials (Micropoint Company), 3 parts by weight of pearlescent powder and 1 part by weight of polysiloxane, and a second stirring is performed to obtain a second mixture;

[0101] The second mixed material obtained in step 3) is rolled to obtain No. 4 photosensitive and temperature-sensitive color-changing anti-counterfeiting ink.

[0102] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without violating the spirit and scope of the present invention. Therefore, any modification or alteration shall still be covered by the claims of the present invention.

Claims

1. A photosensitive and temperature-sensitive color-changing anti-counterfeiting ink, characterized in that: By weight, including 60-65 parts of binder; 15-18 parts of organic pigment; 2-5 parts of organic solvent; 16-20 copies of anti-counterfeiting materials; The organic pigments are photosensitive color-changing capsules and temperature-sensitive color-changing capsules; The organic solvent is selected from n-propyl ester or ethyl ester; The anti-counterfeiting material comprises, by weight, 8-12 copies of photosensitive anti-counterfeiting materials; 6-10 copies of temperature-sensitive anti-counterfeiting materials; The temperature-sensitive anti-counterfeiting material comprises a shell material, a dye and a fatty acid; 1-3 parts of filler; 2-5 parts of additives; The filler is pearl powder; the particle size of the pearl powder is 4-8 μm; The auxiliary agent is a leveling agent and / or a wetting and dispersing agent; The preparation method of the photosensitive and temperature-sensitive color-changing anti-counterfeiting ink, The following steps are included: 1) Grinding the binder material to obtain a pre-prepared material; 2) mixing the pre-prepared material obtained in step 1) with an organic solvent, and performing a first stirring to obtain a first mixed material; 3) mixing the first mixed material obtained in step 2) with the organic colorant and the anti-counterfeiting material, and performing a second stirring to obtain a second mixed material; 4) rolling the second mixed material obtained in step 3) to obtain the photosensitive and temperature-sensitive color-changing anti-counterfeiting ink; The rolling temperature is 30-35°C; the rolling pressure is 35-45Pa; The linking material comprises, by weight, 10-15 parts of natural rosin resin; Polyvinyl alcohol 5-10 parts; Epoxy resin 5-8 parts; Acrylate 25-30 parts; Rubber resin 5-8 parts.

2. The photosensitive and temperature-sensitive color-changing anti-counterfeiting ink according to claim 1, characterized in that: Include at least one of the following technical features: 21) In step 2), the first stirring speed is 150-180 rpm; 22) In step 2), the first stirring time is 20-30 minutes 31) In step 3), the second stirring speed is 180-200 rpm; 32) In step 3), the second stirring time is 20 minutes; 33) In step 3), during the second stirring, fillers and additives are added.

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