Optically variable ink, production process and packaging structure

Abstract

The invention discloses optically variable ink, a production process and a packaging mechanism. The optically variable ink is prepared from the following raw materials in parts by weight: 60-70 parts of gloss oil and 30-40 parts of photosensitive color-changing pigment. According to the present invention, the epoxy acrylate provides the film-forming property and the adhesion, the reactive diluent adjusts the viscosity and participates in the curing reaction, the photoinitiator initiates the UV curing reaction, the dispersant assists the uniform dispersion of the pigment, the leveling agent improves the leveling property of the ink, and the defoaming agent prevents the ink from generating bubbles; the antioxidant prolongs the shelf life of the ink, keeps the stable performance of the ink, and prevents deterioration caused by oxidation. The ink is obvious in color change after illumination and long in light change time.

Description

Technical Field

[0001] The present invention relates to the field of inks, and specifically to a photochromic ink, its production process and packaging structure. Background Art

[0002] The existing photochromic inks have poor photochromic effects, and the color after photochromism is not significantly different from the color before photochromism. For example, a Chinese patent with the publication number CN110698923A discloses a photochromic ink, which includes components in the following mass fractions: 30 - 50 parts of a composite binder, 10 - 20 parts of a photochromic pigment, 30 - 40 parts of a composite solvent, 5 - 10 parts of nanoparticles with a particle size of 10 - 50 nm, 1 - 5 parts of a surfactant, and 1 - 5 parts of a photochromic pigment stabilizer. The photochromic pigment has a high dispersion degree and strong stability, and the color distribution is uniform. The above-mentioned cited photochromic ink uses a composite binder for compounding, which will result in a short photochromic time and an unsatisfactory photochromic color.

[0003] In view of this, it is necessary to provide a photochromic ink, production process and packaging structure. Summary of the Invention

[0004] The photochromic ink, production process and packaging structure provided by the present invention effectively solve the problem that the existing ink has an unsatisfactory photochromic effect.

[0005] The technical solution adopted by the present invention is as follows:

[0006] The photochromic ink is made from the following raw materials in parts by weight: 60 - 70 parts of varnish and 30 - 40 parts of a photosensitive color-changing pigment.

[0007] Furthermore: The varnish is made from the following raw materials in parts by weight: 60 - 70 parts of epoxy acrylate, 20 - 25 parts of an active diluent, 4 - 6 parts of a photoinitiator, 1 - 2 parts of a leveling agent, 1 - 2 parts of an antifoaming agent, 1 - 2 parts of a dispersant, and 1 - 2 parts of an antioxidant.

[0008] Furthermore: The amount of the varnish is 63 - 66 parts, and the amount of the photosensitive color-changing pigment is 34 - 37 parts.

[0009] Furthermore: The amount of the varnish is 65 parts, and the amount of the photosensitive color-changing pigment is 35 parts.

[0010] Furthermore: The amount of the varnish is 70 parts, and the amount of the photosensitive color-changing pigment is 30 parts.

[0011] Furthermore: The varnish is made from the following raw materials in parts by weight: 63 - 67 parts of epoxy acrylate, 20 - 25 parts of an active diluent, 4 - 6 parts of a photoinitiator, 1 - 2 parts of a leveling agent, 1 - 2 parts of an antifoaming agent, 1 - 2 parts of a dispersant, and 1 - 2 parts of an antioxidant.

[0012] Furthermore: The varnish is made from raw materials in parts by weight: The varnish is made from raw materials in parts by weight: 63 - 67 parts of epoxy acrylate, 22 - 24 parts of reactive diluent, 4 - 6 parts of photoinitiator, 1 - 2 parts of leveling agent, 1 - 2 parts of defoaming agent, 1 - 2 parts of dispersant, 1 - 2 parts of antioxidant.

[0013] Furthermore: The varnish further includes a polycaprolactone plasticizer. The varnish is made from raw materials in parts by weight: 65 parts of epoxy acrylate, 23 parts of reactive diluent, 5 parts of photoinitiator, 1 part of leveling agent, 1 part of defoaming agent, 2 parts of dispersant, 2 parts of antioxidant, 1 part of polycaprolactone plasticizer.

[0014] Furthermore: The particle size of the photosensitive color-changing pigment is 10 - 20 um.

[0015] A production process for producing the photochromic ink described above. S1: Select a container; S2: Mix and stir the varnish and the photosensitive color-changing pigment in the container to make the varnish and the photosensitive color-changing pigment fully and evenly mixed. The ambient temperature during the stirring process is controlled at 10 - 30 °C, and the ambient humidity is controlled at 30 - 75%.

[0016] A packaging structure includes a base layer, and the above-mentioned photochromic ink is provided on the base layer.

[0017] Advantages of the invention: The film-forming property and adhesion are provided by epoxy acrylate, the viscosity is adjusted by the reactive diluent and it participates in the curing reaction, the UV curing reaction is initiated by the photoinitiator, the pigment is helped to be evenly dispersed by the dispersant, the leveling property of the ink is improved by the leveling agent, the formation of bubbles in the ink is prevented by the defoaming agent, and the shelf life of the ink is extended and its performance is kept stable by the antioxidant to prevent deterioration due to oxidation. The ink has obvious color change after illumination and a long photochromic time. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the photochromic ink of the present application after photochromic change provided by the embodiment of the present application.

[0019] Figure 2 It is a schematic diagram of the photochromic ink of the present application before photochromic change provided by the embodiment of the present application. Detailed Description of the Invention

[0020] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be made in conjunction with the accompanying drawings.

[0021] An embodiment provided by the present application is a photochromic ink, which is made from the following raw materials in parts by weight: 60 - 70 parts of varnish, 30 - 40 parts of photosensitive color-changing pigment.

[0022] In the above design, the combination of photosensitive color-changing pigments and varnish is used to achieve the instant color change of the ink, and the overall leveling property of the ink is excellent.

[0023] Specifically: The varnish is made of raw materials in parts by weight: 60 - 70 parts of epoxy acrylate, 20 - 25 parts of reactive diluent, 4 - 6 parts of photoinitiator, 1 - 2 parts of leveling agent, 1 - 2 parts of defoamer, 1 - 2 parts of dispersant, and 1 - 2 parts of antioxidant.

[0024] In the above design, the film-forming property and adhesion are provided by epoxy acrylate, the viscosity is adjusted and the curing reaction is participated in by the reactive diluent, the UV curing reaction is initiated by the photoinitiator, the pigments are evenly dispersed with the help of the dispersant, the leveling property of the ink is improved by the leveling agent, the generation of bubbles in the ink is prevented by the defoamer, the shelf life of the ink is extended and its performance is kept stable by the antioxidant, and deterioration due to oxidation is prevented, which helps to extend the light-changing time and improve the light-changing effect.

[0025] Specifically: The amount of the varnish is 63 - 66 parts, and the photosensitive color-changing pigment is 34 - 37 parts.

[0026] The photochromic ink according to claim 3, wherein: the varnish is 65 parts, and the photosensitive color-changing pigment is 35 parts.

[0027] Specifically: The varnish is made of raw materials in parts by weight: 63 - 67 parts of epoxy acrylate, 20 - 25 parts of reactive diluent, 4 - 6 parts of photoinitiator, 1 - 2 parts of leveling agent, 1 - 2 parts of defoamer, 1 - 2 parts of dispersant, and 1 - 2 parts of antioxidant.

[0028] Specifically: The varnish is made of raw materials in parts by weight: 63 - 67 parts of epoxy acrylate, 22 - 24 parts of reactive diluent, 4 - 6 parts of photoinitiator, 1 - 2 parts of leveling agent, 1 - 2 parts of defoamer, 1 - 2 parts of dispersant, and 1 - 2 parts of antioxidant.

[0029] Specifically: The varnish further includes a polycaprolactone plasticizer, and the varnish is made of raw materials in parts by weight: 65 parts of epoxy acrylate, 23 parts of reactive diluent, 5 parts of photoinitiator, 1 part of leveling agent, 1 part of defoamer, 2 parts of dispersant, 2 parts of antioxidant, and 1 part of polycaprolactone plasticizer.

[0030] Specifically: The particle size of the photosensitive color-changing pigment is 10 - 20 um.

[0031] The following are several specific embodiments provided by this application.

[0032] Specific Embodiment 1: The photochromic ink is made from the following raw materials in parts by weight: 60 parts of varnish and 40 parts of photochromic pigment. The varnish is made from the following raw materials in parts by weight: 67 parts of epoxy acrylate, 25 parts of reactive diluent, 4 parts of photoinitiator, 1 part of leveling agent, 1 part of defoamer, 1 part of dispersant, and 1 part of antioxidant.

[0033] Specific Embodiment 2: The photochromic ink is made from the following raw materials in parts by weight: 65 parts of the varnish and 35 parts of the photochromic pigment. The varnish is made from the following raw materials in parts by weight: 67 parts of epoxy acrylate, 25 parts of reactive diluent, 4 parts of photoinitiator, 1 part of leveling agent, 1 part of defoamer, 1 part of dispersant, and 1 part of antioxidant.

[0034] Specific Embodiment 3: The photochromic ink is made from the following raw materials in parts by weight: 70 parts of the varnish and 30 parts of the photochromic pigment. The varnish is made from the following raw materials in parts by weight: 67 parts of epoxy acrylate, 25 parts of reactive diluent, 4 parts of photoinitiator, 1 part of leveling agent, 1 part of defoamer, 1 part of dispersant, and 1 part of antioxidant.

[0035] Specific Embodiment 4: The photochromic ink is made from the following raw materials in parts by weight: 60 parts of the varnish and 40 parts of the photochromic pigment. The varnish is made from the following raw materials in parts by weight: 70 parts of epoxy acrylate, 20 parts of reactive diluent, 4 parts of photoinitiator, 1 part of leveling agent, 1 part of defoamer, 2 parts of dispersant, and 2 parts of antioxidant.

[0036] Specific Embodiment 5: The photochromic ink is made from the following raw materials in parts by weight: 65 parts of the varnish and 35 parts of the photochromic pigment. The varnish is made from the following raw materials in parts by weight: 70 parts of epoxy acrylate, 20 parts of reactive diluent, 4 parts of photoinitiator, 1 part of leveling agent, 1 part of defoamer, 2 parts of dispersant, and 2 parts of antioxidant.

[0037] Specific Embodiment 6: The photochromic ink is made from the following raw materials in parts by weight: 70 parts of the varnish and 30 parts of the photochromic pigment. The varnish is made from the following raw materials in parts by weight: 70 parts of epoxy acrylate, 20 parts of reactive diluent, 4 parts of photoinitiator, 1 part of leveling agent, 1 part of defoamer, 2 parts of dispersant, and 2 parts of antioxidant.

[0038] Specific Embodiment 7: The photochromic ink is made from the following raw materials in parts by weight: 60 parts of the varnish and 40 parts of the photochromic pigment. The varnish also includes polycaprolactone plasticizer. The varnish is made from the following raw materials in parts by weight: 65 parts of epoxy acrylate, 23 parts of reactive diluent, 5 parts of photoinitiator, 1 part of leveling agent, 1 part of defoamer, 2 parts of dispersant, 2 parts of antioxidant, and 1 part of polycaprolactone plasticizer.

[0039] Specific Embodiment VIII: The photochromic ink is made from the following raw materials in parts by weight: 65 parts of the varnish and 35 parts of the photosensitive color-changing pigment. The varnish further includes a polycaprolactone plasticizer. The varnish is made from the following raw materials in parts by weight: 65 parts of epoxy acrylate, 23 parts of active diluent, 5 parts of photoinitiator, 1 part of leveling agent, 1 part of defoaming agent, 2 parts of dispersant, 2 parts of antioxidant, and 1 part of polycaprolactone plasticizer.

[0040] Specific Embodiment IX: The photochromic ink is made from the following raw materials in parts by weight: 65 parts of the varnish and 35 parts of the photosensitive color-changing pigment. The varnish further includes a polycaprolactone plasticizer. The varnish is made from the following raw materials in parts by weight: 65 parts of epoxy acrylate, 23 parts of active diluent, 5 parts of photoinitiator, 1 part of leveling agent, 1 part of defoaming agent, 2 parts of dispersant, 2 parts of antioxidant, and 1 part of polycaprolactone plasticizer.

[0041] For Specific Embodiments 1 to 9 and the comparative example of the present application, a photochromic effect test was carried out, and the test results were divided into NG and OK. The method was as follows: Select an ultraviolet light source with a fixed power, place the ink product to be tested at the test position, ensure that the ultraviolet light source irradiates each ink product to be tested with the same power at the same angle, and the external environment is constant during the irradiation process.

[0042] The light irradiation tests of the second embodiment, the third embodiment, the fourth embodiment, and the comparative example are as shown in Table 1 below:

[0043] Table 1

[0044]

[0045]

[0046] As can be seen from Table 1 above, when the inks of the second to tenth embodiments prepared with the ratio of the present application are irradiated with light, the photochromic effect is OK, that is, when the light source irradiates the inks of the second to tenth embodiments, the ink can change color instantly, and the color before and after the color change can be clearly distinguished by the naked eye within two meters. The photochromic effect of the comparative example is NG, which means that the ink of the comparative example cannot change color instantly under the same light irradiation conditions, and the color before and after the color change cannot be clearly distinguished by the naked eye within two meters. The photochromic ink of the present application can be specifically referred to in the attached Figure 1 and attached Figure 2 , Figure 1 The patterns distributed around the orange circle in the upper right corner in Figure 2 are yellow and purple, and Figure 2 the patterns distributed around the orange circle in the upper right corner in Figure 1 are yellow and milky white. After light irradiation, Figure 1 the milky white area inFigure 2 The ink in the picture [[ID=]] has obvious color change.

[0047] Therefore, in summary, the photochromic ink of the present application has good photochromic effect and leveling property.

[0048] The tenth embodiment provided by the present application is a production process for producing the photochromic ink. S1: Select a container; S2: Mix and stir the varnish and the photosensitive color-changing pigment in the container to make the varnish and the photosensitive color-changing pigment fully and evenly mixed. The ambient temperature during the stirring process is controlled at 10 - 30 °C, and the ambient humidity is controlled at 30 - 75%.

[0049] The eleventh embodiment provided by the present application is a packaging structure, including a base layer, on which the photochromic ink is provided.

[0050] For further detailed description, it should be understood that the above are only specific embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. Optically variable ink, characterized in that: The invention is made of the following raw materials in parts by weight: 60-70 parts of varnish and 30-40 parts of photochromic pigment.

2. The optically variable ink according to claim 1, characterized in that: The varnish is made of raw materials in parts by weight: 60-70 parts of epoxy acrylate, 20-25 parts of active diluent, 4-6 parts of photoinitiator, 1-2 parts of leveling agent, 1-2 parts of defoamer, 1-2 parts of dispersant and 1-2 parts of antioxidant.

3. The optically variable ink according to claim 1, characterized in that: The varnish is present in an amount of 63 to 66 parts, and the photochromic pigment is present in an amount of 34 to 37 parts.

4. The optically variable ink according to claim 3, characterized in that: The varnish accounts for 65 parts, and the photochromic pigment accounts for 35 parts.

5. The optically variable ink according to claim 2, characterized in that: The varnish is made of raw materials in parts by weight: 63-67 parts of epoxy acrylate, 20-25 parts of active diluent, 4-6 parts of photoinitiator, 1-2 parts of leveling agent, 1-2 parts of defoamer, 1-2 parts of dispersant and 1-2 parts of antioxidant.

6. The optically variable ink according to claim 5, characterized in that: The varnish is made of raw materials in parts by weight: 63-67 parts of epoxy acrylate, 22-24 parts of active diluent, 4-6 parts of photoinitiator, 1-2 parts of leveling agent, 1-2 parts of defoamer, 1-2 parts of dispersant and 1-2 parts of antioxidant.

7. The optically variable ink according to claim 6, characterized in that: The varnish also includes a polycaprolactone plasticizer, and the varnish is made of raw materials in parts by weight: 65 parts of epoxy acrylate, 23 parts of reactive diluent, 5 parts of photoinitiator, 1 part of leveling agent, 1 part of defoamer, 2 parts of dispersant, 2 parts of antioxidant, and 1 part of polycaprolactone plasticizer.

8. The optically variable ink according to claim 1, characterized in that: The particle size of the photochromic pigment is between 10 and 20 μm.

9. A production process for producing the optically variable ink according to any one of claims 1 to 8, characterized in that: S1, select a container; S2, mix and stir the varnish and the photochromic pigment in the container to make the varnish and the photochromic pigment fully mixed and uniform, and control the ambient temperature at 10-30°C and the ambient humidity at 30-75% during the stirring process.

10. A packaging structure, characterized in that: It comprises a base layer, on which the optically variable ink according to any one of claims 1 to 8 is arranged.

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