Composition for preparing ink, ink as well as preparation method and application of ink

Abstract

The invention relates to the field of printing ink materials, and discloses a composition for preparing printing ink, the printing ink and a preparation method and application of the printing ink. The composition comprises the following components: glass beads, varnish, a whitening agent, a binder and an auxiliary agent, based on the total mass of the composition, the content of the glass beads is 5-10 wt%, the content of the varnish is 20-25 wt%, the content of the whitening agent is 32-40 wt%, the content of the binder is 30-60 wt%, and the content of the auxiliary agent is 0.1-5 wt%. Wherein the refractive index of the glass beads is 1.90-1.95, and the average particle diameter of the glass beads is smaller than 10 microns. The ink provided by the invention can better enhance the light reflectivity and effectively improve the photoelectric conversion rate of a photovoltaic power generation panel.

Description

Technical Field

[0001] The present invention relates to the technical field of ink materials, and in particular to a composition for preparing ink, ink, and a preparation method and application thereof. Background Art

[0002] With the scarcity of traditional non-renewable energy such as oil, coal, and natural gas, and the public's attention to environmental protection, my country's photovoltaic industry has developed well. Since the power generation efficiency of solar cells is close to the theoretical value and there is little room for improvement, increasing the power generation efficiency of solar cells by improving the utilization rate of sunlight is an effective means of reducing costs and increasing efficiency.

[0003] Photovoltaic double-glass modules are composite modules consisting of front glass, back glass, solar cells, wires, etc. Usually light penetrates the back glass, causing solar energy loss. To improve the utilization rate of light energy, a layer of reflective ink can be coated on the surface of the back glass to allow the lost light to return to the cells to improve the photoelectric conversion rate.

[0004] Reflective ink is composed of varnish, brightener, high-temperature adhesive, additives, etc. Existing reflective ink has problems such as low reflectivity, poor leveling, easy aging, and environmental pollution. The formula and process need to be further improved.

[0005] CN115746624A discloses a super-reflective water-based ink for photovoltaic glass, characterized in that: calculated by weight, the raw materials include: 10 to 20 parts of environmentally friendly water-based resin, 3 to 5 parts of additives, 30 to 50 parts of titanium dioxide, 35 to 50 parts of glass powder, and 5 to 15 parts of environmentally friendly solvents; the environmentally friendly water-based resin is at least one of water-based polyurethane and water-based acrylic resin. Although this solution improves the reflectivity by increasing the fineness of the ink, it has poor bonding and is easy to fall off.

[0006] CN116239312A discloses an environmentally friendly high-reflective ink coating for photovoltaic glass, characterized by: comprising white reflective ink screen-printed on the surface of the back plate glass and inorganic reflective material planted on the surface of the white reflective ink, the white reflective ink comprising high-temperature bonding phase glass powder, functional whitening powder and water-based environmentally friendly ink oil, and the inorganic reflective material is a high-refractive reflective glass micro-bead with a refractive index of 1.93, and the particle size range is 23 to 65 microns. Although this solution uses glass micro-beads to improve the reflectivity, a layer of glass micro-beads must be planted on the printed surface, which has poor bonding and is easy to fall off. Summary of the invention

[0007] The purpose of the present invention is to overcome the problem that the reflective ink in the prior art cannot achieve high reflectivity under the premise of being green and environmentally friendly and having a simple process.

[0008] In order to achieve the above object, the first aspect of the present invention provides a composition for preparing ink, wherein the composition contains the following components which are stored separately or in a mixture of two or more:

[0009] Glass beads, varnish, brightener, binder, additives;

[0010] Based on the total mass of the composition, the content of the glass microspheres is 5-10wt%, the content of the varnish is 20-25wt%, the content of the brightener is 32-40wt%, the content of the binder is 30-60wt%, and the content of the auxiliary agent is 0.1-5wt%;

[0011] The refractive index of the glass microspheres is 1.90-1.95, and the average particle diameter is less than 10 μm;

[0012] The varnish is selected from at least one of water-based polyurethane resin and water-based acrylic resin;

[0013] The binder is selected from at least one of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder.

[0014] Preferably, based on the total mass of the composition, the content of the glass microspheres is 7-9wt%, the content of the varnish is 21-25wt%, the content of the brightener is 36-40wt%, the content of the binder is 30-35wt%, and the content of the auxiliary agent is 0.1-2wt%.

[0015] Preferably, the ink is water-based acrylic resin.

[0016] Preferably, the refractive index of the glass microspheres is 1.93.

[0017] Preferably, the binder is a combination of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder.

[0018] More preferably, the binder is a combination of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder in a mass ratio of 1:0.6-0.8.

[0019] Preferably, based on the total mass of the composition, the content of the glass microbeads is 8-9wt%, the content of the varnish is 21-23wt%, the content of the brightener is 36-38wt%, the content of the binder is 30-34wt%, and the content of the auxiliary agent is 0.1-2wt%; the varnish is an aqueous acrylic resin; the binder is a combination of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder in a content mass ratio of 1:0.6-0.8.

[0020] The second aspect of the present invention provides a method for preparing ink, which is carried out using the composition of the first aspect, comprising:

[0021] (1) mixing glass micro beads, varnish, brightener, binder, and additive to obtain a mixed material;

[0022] (2) grinding the mixed material to obtain the ink;

[0023] Based on the total amount of the composition, the amount of the glass microspheres is 5-10wt%, the amount of the varnish is 20-25wt%, the amount of the brightener is 32-40wt%, the amount of the binder is 30-60wt%, and the amount of the auxiliary agent is 0.1-5wt%;

[0024] The refractive index of the glass microspheres is 1.90-1.95, and the average particle diameter is less than 10 μm;

[0025] The varnish is selected from at least one of water-based polyurethane resin and water-based acrylic resin;

[0026] The binder is selected from at least one of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder.

[0027] Preferably, the mixing is performed under stirring conditions, and the stirring conditions include: temperature of 20-40° C., time of 5-20 min, and stirring speed of 200-1000 rpm.

[0028] And / or, the grinding process is performed in a three-roll mill, and the grinding process conditions include: the roller spacing is 5-10 μm.

[0029] The third aspect of the present invention provides ink prepared by the method described in the second aspect.

[0030] Preferably, the average particle diameter of the ink is no greater than 10 μm.

[0031] The fourth aspect of the present invention provides use of the ink described in the third aspect in a photovoltaic module.

[0032] The ink prepared by the composition for preparing ink provided by the present invention has excellent reflectivity and silk screen effect. In particular, the light reflectivity of the ink obtained by the present invention reaches more than 85%, and the preparation process is simple. The raw materials used are all lead-free and environmentally friendly materials, which meets the national environmental protection requirements. DETAILED DESCRIPTION

[0033] The endpoints and any values ​​of the ranges disclosed in this article are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0034] As mentioned above, the first aspect of the present invention provides a composition for preparing ink, wherein the composition contains the following components which are stored separately or in a mixture of two or more:

[0035] Glass beads, varnish, brightener, binder, additives;

[0036] Based on the total mass of the composition, the content of the glass microspheres is 5-10wt%, the content of the varnish is 20-25wt%, the content of the brightener is 32-40wt%, the content of the binder is 30-60wt%, and the content of the auxiliary agent is 0.1-5wt%;

[0037] The refractive index of the glass microspheres is 1.90-1.95, and the average particle diameter is less than 10 μm;

[0038] The varnish is selected from at least one of water-based polyurethane resin and water-based acrylic resin;

[0039] The binder is selected from at least one of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder.

[0040] It should be noted that the refractive index of the glass microspheres in the present invention refers to the refractive index to sodium yellow light.

[0041] Preferably, the composition of the ZnO-B2O3-SiO2 glass powder is 10-20wt% ZnO, 15-25wt% B2O3, 20-40wt% SiO2, 1-5wt% K2O, 10-20wt% Na2O, 2-7wt% Al2O3, 1-3wt% ZrO2, 1-4wt% CaO, 1-3wt% MgO, 1-2wt% TiO2, and 2-8wt% BaO.

[0042] Preferably, the composition of the TiO2-BaO-SiO2 glass powder is 5-15wt% TiO2, 1-10wt% BaO, 10-15wt% ZnO, 10-25wt% B2O3, 12-35wt% SiO2, 3-8wt% K2O, 1-5wt% Na2O, 0.5-2wt% Li2O, 0.5-4.5wt% Al2O3, 0-3wt% ZrO2, 0-3wt% CaO, 0-2wt% MgO, 0-10wt% BaO, and 0-1wt% Sb2O3.

[0043] Preferably, based on the total weight of the composition, the content of the glass beads is 7-9wt%, the content of the varnish is 21-25wt%, the content of the brightener is 36-40wt%, the content of the binder is 30-35wt%, and the content of the auxiliary agent is 0.1-2wt%. The inventors found that under this preferred embodiment, the ink obtained by the present invention has a better light reflectivity.

[0044] Preferably, the ink is water-based acrylic resin.

[0045] Preferably, the refractive index of the glass microspheres is 1.93.

[0046] Preferably, the binder is a combination of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder.

[0047] More preferably, the binder is a combination of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder in a mass ratio of 1:0.6-0.8. The inventors found that under this preferred embodiment, the ink obtained by the present invention has a better light reflectivity.

[0048] Preferably, based on the total mass of the composition, the content of the glass beads is 8-9wt%, the content of the varnish is 21-23wt%, the content of the brightener is 36-38wt%, the content of the binder is 30-34wt%, and the content of the auxiliary agent is 0.1-2wt%; the varnish is a water-based acrylic resin; the binder is a combination of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder in a mass ratio of 1:0.6-0.8. The inventors found that under this preferred embodiment, the ink obtained by the present invention has a better light reflectivity.

[0049] Preferably, the auxiliary agent is selected from at least one of a thixotropic agent, a leveling agent, a defoaming agent and a dispersant.

[0050] More preferably, the auxiliary agent is selected from at least two of a thixotropic agent, a leveling agent, a defoaming agent, and a dispersant.

[0051] Preferably, the whitening agent is selected from at least one of rutile titanium dioxide, anatase titanium dioxide and nano titanium dioxide.

[0052] As mentioned above, the second aspect of the present invention provides a method for preparing ink, which is carried out using the composition described in the first aspect, comprising:

[0053] (1) mixing glass micro beads, varnish, brightener, binder, and additive to obtain a mixed material;

[0054] (2) grinding the mixed material to obtain the ink;

[0055] Based on the total amount of the composition, the amount of the glass microspheres is 5-10wt%, the amount of the varnish is 20-25wt%, the amount of the brightener is 32-40wt%, the amount of the binder is 30-60wt%, and the amount of the auxiliary agent is 0.1-5wt%;

[0056] The refractive index of the glass microspheres is 1.90-1.95, and the average particle diameter is less than 10 μm;

[0057] The varnish is selected from at least one of water-based polyurethane resin and water-based acrylic resin;

[0058] The binder is selected from at least one of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder.

[0059] Preferably, the mixing is performed under stirring conditions, and the stirring conditions include: temperature of 20-40° C., time of 5-20 min, and stirring speed of 200-1000 rpm.

[0060] And / or, the grinding process is performed in a three-roll mill, and the grinding process conditions include: the roller spacing is 5-10 μm.

[0061] In the present invention, there is no specific requirement for the rotation speed of the three-roll mill in the grinding process, and the process is carried out by conventional methods in the art. For example, the rotation speed ratio can be 1:2-4:8-10, which will not be described in detail in the present invention and should not be construed as a limitation to the present invention.

[0062] As mentioned above, the third aspect of the present invention provides an ink prepared by the method described in the second aspect.

[0063] Preferably, the average diameter of the ink particles is no greater than 10 μm.

[0064] As mentioned above, the fourth aspect of the present invention provides the use of the ink described in the third aspect in a photovoltaic module.

[0065] The present invention will be described in detail below through examples. In the following examples, unless otherwise specified, the experimental instruments, reagents and raw materials involved are all commercially available, and the reagents are all analytically pure products.

[0066] In the following examples, unless otherwise specified, each wt% represents 10 g.

[0067] raw material

[0068] Glass microbeads I: refractive index 1.93, average particle diameter 5-10 μm, purchased from Nanjing Hongbo Reflective Materials Co., Ltd.

[0069] Water-based polyurethane resin: model BY335A, manufacturer Dongguan Yibao Resin Co., Ltd.

[0070] Water-based acrylic resin: model WH103C, manufacturer: Guangzhou Wanhua New Material Technology Co., Ltd.

[0071] The composition of the ZnO-B2O3-SiO2 glass powder is 15wt% ZnO, 20wt% B2O3, 30wt% SiO2, 3wt% K2O, 15wt% Na2O, 5wt% Al2O3, 2wt% ZrO2, 3wt% CaO, 2wt% MgO, 1wt% TiO2, and 4wt% BaO;

[0072] The composition of TiO2-BaO-SiO2 glass powder is 15wt% TiO2, 8wt% BaO, 12wt% ZnO, 20wt% B2O3, 30wt% SiO2, 4wt% K2O, 2wt% Na2O, 1wt% Li2O, 2wt% Al2O3, 1wt% ZrO2, 1wt% CaO, 1wt% MgO, 3wt% BaO;

[0073] Leveling agent: Fluorocarbon modified acrylic leveling agent, model KMT-1023, manufacturer: Foshan Kening New Materials Co., Ltd.

[0074] Defoamer: silicone defoamer, model KMT-7033, manufacturer: Foshan Kening New Materials Co., Ltd.

[0075] Dispersant: polymer type super dispersant, model KMT-3655, manufacturer: Foshan Kening New Materials Co., Ltd.

[0076] Brightener: rutile titanium dioxide, model R-930, manufacturer is Hebei Weicai Pigment Co., Ltd.

[0077] Example 1

[0078] This example is used to illustrate that the ink of the present invention is prepared according to the formulation in Table 1 and the method described below.

[0079] (1) mixing glass micro beads, varnish, brightener, binder, and additive to obtain a mixed material; the mixing conditions are: temperature of 25° C., time of 20 min, and stirring speed of 800 rpm;

[0080] (2) Grinding the mixed material in a three-roll mill to obtain the ink; the grinding process is performed under the condition that the roller spacing is 8 μm.

[0081] Unless otherwise specified, the remaining examples were carried out using a process similar to that of Example 1, except that the formulations used in each example were different, as shown in Table 1 (Note: the parameters not listed in Table 1 are the same as the corresponding parameters in Example 1).

[0082] Table 1

[0083]

[0084]

[0085] Example 6

[0086] This embodiment is carried out using a process similar to that of Embodiment 1, except that the total amount of the binder in this embodiment is the same as that in Embodiment 1, but the binder is a combination of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder in a mass ratio of 1:0.5.

[0087] The rest are the same as in Example 1.

[0088] Ink S6 was prepared.

[0089] Example 7

[0090] This example is carried out using a process similar to that of Example 1, except that an equal mass of waterborne polyurethane resin is used in this example to replace the waterborne acrylic resin in Example 1.

[0091] The rest are the same as in Example 1.

[0092] Ink S7 was prepared.

[0093] Comparative Example 1

[0094] This comparative example is carried out using a process similar to that of Example 1, except that the amount of glass microspheres I in this comparative example is 11 wt %, the amount of water-based acrylic resin is 20.5 wt %, and the amount of brightener is 34.5 wt %.

[0095] The rest are the same as in Example 1.

[0096] Ink DS1 was prepared.

[0097] Comparative Example 2

[0098] This comparative example is carried out using a process similar to that of Example 1, except that this comparative example uses glass beads II of equal mass (with a refractive index of 1.93 and an average particle diameter of 11-20 μm, purchased from Nanjing Hongbo Reflective Materials Co., Ltd.) to replace the glass beads I in Example 1.

[0099] The rest are the same as in Example 1.

[0100] Ink DS2 was prepared.

[0101] Comparative Example 3

[0102] This comparative example is carried out using a process similar to that of Example 1, except that glass microspheres I are not used in this comparative example. Specifically:

[0103] Based on the total amount of the composition, the amount of the varnish is 22wt%, the amount of the brightener is 38wt%, the amount of the binder is 38wt% (the amount of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder in the binder is the same as in Example 1), and the amount of the auxiliary agent is 2wt%.

[0104] The rest are the same as in Example 1.

[0105] Ink DS3 was prepared.

[0106] Comparative Example 4

[0107] This comparative example is carried out using a process similar to that of Example 1, except that glass microbeads I are not used in this comparative example. Specifically:

[0108] Based on the total amount of the composition, the amount of the varnish is 25wt%, the amount of the brightener is 35wt%, the amount of the binder is 38wt% (the amount of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder in the binder is the same as that in Example 1), and the amount of the auxiliary agent is 2wt%.

[0109] The rest are the same as in Example 1.

[0110] Ink DS4 was prepared.

[0111] Test Case

[0112] This test example is used to illustrate the light reflectivity effect test of the ink prepared in the above example; the results are shown in Table 2.

[0113] Test standard (method): HG / T 4915-2016

[0114] Table 2

[0115] Light reflectivity (%) Example 1 92 Example 2 91 Example 3 89 Example 4 88 Example 5 87 Example 6 88 Example 7 90 Comparative Example 1 85 Comparative Example 2 77 Comparative Example 3 72 Comparative Example 4 74

[0116] It can be seen from the results in Table 2 that the reflective ink layer provided by the present invention can better enhance the light reflectivity and effectively improve the photoelectric conversion rate of the photovoltaic panel. In addition, the preparation process is simple, and the raw materials used are all lead-free and environmentally friendly materials, which meet the national environmental protection requirements.

[0117] The reflective ink provided by the invention has good bonding property, is not easy to fall off, has good leveling effect and good aging resistance.

[0118] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited thereto. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, including the combination of various technical features in any other suitable manner, and these simple modifications and combinations should also be regarded as the contents disclosed by the present invention and belong to the protection scope of the present invention.

Claims

1. A composition for preparing ink, characterized in that, The composition contains the following components which are stored independently or in combination: Glass beads, varnish, brightener, binder, additives; Based on the total mass of the composition, the content of the glass microspheres is 5-10wt%, the content of the varnish is 20-25wt%, the content of the brightener is 32-40wt%, the content of the binder is 30-60wt%, and the content of the auxiliary agent is 0.1-5wt%; The refractive index of the glass microspheres is 1.90-1.95, and the average particle diameter is less than 10 μm; The varnish is selected from at least one of water-based polyurethane resin and water-based acrylic resin; The binder is selected from at least one of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder.

2. The composition according to claim 1, characterized in that Based on the total mass of the composition, the content of the glass microspheres is 7-9wt%, the content of the varnish is 21-25wt%, the content of the brightener is 36-40wt%, the content of the binder is 30-35wt%, and the content of the auxiliary agent is 0.1-2wt%.

3. The composition according to claim 1 or 2, characterized in that The ink is water-based acrylic resin; And / or, the refractive index of the glass microspheres is 1.

93.

4. The composition according to any one of claims 1 to 3, characterized in that The binder is a combination of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder.

5. The composition according to claim 4, characterized in that The binder is a combination of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder in a mass ratio of 1:0.6-0.

8.

6. The composition according to claim 5, characterized in that Based on the total mass of the composition, the content of the glass microbeads is 8-9wt%, the content of the varnish is 21-23wt%, the content of the brightener is 36-38wt%, the content of the binder is 30-34wt%, and the content of the auxiliary agent is 0.1-2wt%; the varnish is a water-based acrylic resin; the binder is a combination of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder in a content mass ratio of 1:0.6-0.

8.

7. A method for preparing ink, characterized in that: The method is carried out using the composition according to any one of claims 1 to 6, comprising: (1) mixing glass micro beads, varnish, brightener, binder, and additive to obtain a mixed material; (2) grinding the mixed material to obtain the ink; Based on the total amount of the composition, the amount of the glass microspheres is 5-10wt%, the amount of the varnish is 20-25wt%, the amount of the brightener is 32-40wt%, the amount of the binder is 30-60wt%, and the amount of the auxiliary agent is 0.1-5wt%; The refractive index of the glass microspheres is 1.90-1.95, and the average particle diameter is less than 10 μm; The varnish is selected from at least one of water-based polyurethane resin and water-based acrylic resin; The binder is selected from at least one of ZnO-B2O3-SiO2 glass powder and TiO2-BaO-SiO2 glass powder.

8. The method according to claim 7, characterized in that In step (1), the mixing is performed under stirring conditions, wherein the stirring conditions include: a temperature of 20-40° C., a time of 5-20 min, and a stirring speed of 200-1000 rpm; And / or, the grinding process is performed in a three-roll mill, and the grinding process conditions include: the roller spacing is 5-10 μm.

9. The ink is prepared by the method according to claim 7 or 8; Preferably, the average particle diameter of the ink is no greater than 10 μm.

10. Use of the ink according to claim 9 in photovoltaic modules.

Images