Perylene black paste, preparation method, application method and application

Abstract

The invention belongs to the technical field of hyperspectral camouflage slurry preparation, and discloses perylene black slurry, a preparation method, an application method and application. The perylene black paste has a jelly state and a liquid water state, and the jelly-like perylene black paste comprises the following components in percentage by weight: 45%-55% of deionized water, 5%-8% of a wetting dispersant, 35%-45% of perylene black powder, 0.2%-0.5% of a defoaming agent, 0.1%-0.3% of a mildew preventive, 0.5%-2% of a humectant and 0.5%-1% of HEC cellulose. On the basis of the components, the perylene black paste is in a jelly state and is dispersed at a high speed, and then a pH regulator AM-95 is added, and the weight ratio of the pH regulator AM-95 to the perylene black paste is 0.3%-0.5%. The perylene black paste provided by the invention is used for regulating and controlling a hyperspectral camouflage material. According to the perylene black paste, the preparation method and the application method, the technical problems that in the prior art, a hyperspectral camouflage material is large in visible light color formula design difficulty, limited by a coating resin system, inconvenient to transport and the like can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of hyperspectral camouflage slurry preparation, and in particular to a perylene black slurry, a preparation method, an application method and an application. Background Art

[0002] Hyperspectral camouflage materials are effective camouflage materials against hyperspectral reconnaissance. The spectral reflectance curve of this type of camouflage material must meet the requirements of the GJB 1411A-2015 green vegetation standard spectral reflectance curve. At present, domestic hyperspectral camouflage materials mainly simulate the reflectance spectral curve of vegetation by adjusting the reflectance spectral morphology of visible light (0.38um~0.78um) and near-infrared band (0.78um~2.5um). When adjusting the reflectance spectral morphology of hyperspectral camouflage materials, various pigments need to be used to formulate a color formula similar to the green of vegetation, involving pigments such as yellow, white, and black. At the same time, in order to take into account the simulation of the spectral morphology of the near-infrared band of hyperspectral camouflage materials, perylene black has become the first choice of black pigment.

[0003] Perylene black is a high-performance semi-transparent green-phase black perylene-based organic pigment that provides good chemical resistance, excellent light resistance, weather resistance, high heat stability and high tinting strength. The reflectivity of green vegetation rises rapidly between the visible light and near-infrared bands, forming a "red edge" phenomenon, which is also the most obvious feature of the plant curve and the key spectral region of research. The biggest feature of perylene black is that it has a very high infrared reflectivity and a "red edge" similar to that of green vegetation. At the same time, its color blackness and transparency are better than those of general inorganic infrared reflective pigments.

[0004] When designing a color formula, the pigment is often prepared into a color paste. The use of color paste can complete the color formula design more conveniently and quickly. Perylene black paste is an important raw material for regulating high-spectral camouflage materials. When using perylene black paste, one must consider its dispersion stability and its transportation convenience. The prior art often focuses on studying the stable dispersibility of various color pastes (including but not limited to perylene black paste), while ignoring its transportation convenience, especially perylene black paste. There is no prior art of perylene black paste that is both convenient and safe to transport and has stable dispersibility when used.

[0005] The prior art provides a perylene-based black pigment suitable for coloring water-based coatings (or inks), which only provides a method for preparing perylene black pigments, and does not involve the preparation of perylene black paste. The prior art also provides an organic black paste with infrared transmission function and a preparation method thereof, wherein the organic black paste is a neutral black prepared by mixing yellow, red and blue pigments, and its purpose is to improve the near-infrared reflectance and solar reflectance of the coating film. The organic black paste of this technology does not involve the role in simulating the spectral reflectance characteristics of green vegetation, and has a significant difference in hue from perylene black. The prior art also provides an anti-infrared absorbing black photovoltaic backplane coating and its application, which uses perylene black pigments to prepare black coatings, and resins and curing agents are used in the coating formula, which limits the application of the coating, and the storage period is extremely short, which is not suitable for coating color formula design. The prior art also provides a resin-free water-based color paste and a preparation method thereof, which is suitable for preparing water-based color pastes of carbon black and some organic pigments, but does not disclose the applicability of perylene black pigments, and focuses on the uniform dispersion of the color paste in water, without considering the convenience and safety of color paste transportation.

[0006] In summary, the perylene black slurry and its preparation provided by the prior art have the following technical problems:

[0007] 1. The organic black paste provided by the prior art is a neutral black prepared by mixing multiple pigments such as yellow, red, and blue, which increases the difficulty of designing the visible light color formula of the hyperspectral camouflage material;

[0008] 2. The black color paste in the black coating provided by the prior art is added with resin and curing agent, and the storage period is short. In addition, the color paste containing the resin system has the problem of poor adaptability. For example, the perylene black paste containing polyurethane emulsion can only be used in the coating of the polyurethane system for coloring. Other systems will cause problems such as reaction or demulsification.

[0009] 3. The organic black paste provided by the prior art is generally in the form of flowing liquid water for the convenience of color mixing and production application, which is inconvenient to transport. Summary of the invention

[0010] The purpose of the present invention is to provide a perylene black slurry, a preparation method and an application method, which are used to solve the technical problems existing in the prior art, such as the difficulty in designing the visible light color formula of high-spectrum camouflage materials, the limitation of the coating resin system and the inconvenience in transportation.

[0011] To achieve the above object, the present invention provides the following technical solutions:

[0012] In a first aspect, the present invention provides a perylene black paste, wherein the perylene black paste is defined as an initial state after production and during transportation, and the initial state is a jelly-like state; the perylene black paste is defined as a use state during pigment preparation, and the use state is a liquid water-like state;

[0013] The jelly-like perylene black slurry comprises the following components by weight: 45% to 55% of deionized water, 5% to 8% of a wetting and dispersing agent, 35% to 45% of perylene black powder, 0.2% to 0.5% of a defoaming agent, 0.1% to 0.3% of a mildewproofing agent, 0.5% to 2% of a moisturizing agent, and 0.5% to 1% of HEC cellulose;

[0014] The liquid water-like perylene black slurry is prepared by adding a pH regulator AM-95 to the above components after high-speed dispersion in a jelly-like state, with a weight ratio of 0.3% to 0.5%.

[0015] As a possible implementation, the wetting dispersant is a nonionic polymer copolymer dispersant containing pigment-affinity groups; and / or the index number of the perylene black powder is Pigment Black 32; and / or the defoaming agent is a mineral oil polyether; and / or the humectant is polyethylene glycol.

[0016] As a possible implementation, the fineness of the jelly-like perylene black slurry is 10 to 20 microns, and the solid content is 36% to 47%.

[0017] As a possible implementation method, the fineness of the liquid aqueous perylene black slurry is 10 to 20 microns.

[0018] In a second aspect, the present invention provides a method for preparing a perylene black paste, wherein the perylene black paste is the perylene black paste provided in the first aspect; the preparation method comprises the following steps:

[0019] S10. Add a preset percentage of the total amount of deionized water to the dispersion tank, and then add the total amount of the wetting dispersant, the total amount of HEC cellulose, and the total amount of the defoaming agent. Disperse the mixture at a first stirring rate and a first stirring time, add the total amount of perylene black powder while stirring, and keep the first stirring rate unchanged for a second stirring time after the perylene black powder is added;

[0020] S11. The mixture obtained in step S10 is ground to a preset particle size at a preset grinding rate, and a defoamer is added to a preset percentage of the total amount during the grinding process;

[0021] S12. After filtering the mixture obtained in S11, stirring at a second stirring rate, and sequentially adding the total amount of mildewcide, moisturizer, a preset percentage of the total amount of defoamer and the remaining deionized water while stirring;

[0022] S13. The mixture obtained in S12 is allowed to stand for a preset time to obtain a perylene black slurry in a jelly-like state.

[0023] As a possible implementation, in S10, the first stirring rate is 800-1000 rpm, the first stirring time is 5-8 minutes, and the second stirring time is 10-15 minutes; and / or,

[0024] In S11, the preset grinding rate is 2800-3000 rpm, and the preset particle size is less than or equal to 20 microns; and / or,

[0025] In S12, the second stirring rate is 800-1000 rpm; and / or,

[0026] In S13, the preset time for standing still is 20 to 24 hours.

[0027] As a possible implementation, in S10, the preset percentage of deionized water is 90%, and the preset percentage of the defoaming agent is 33.33%;

[0028] In S11, the preset percentage of defoamer is 33.33%;

[0029] In S12, the preset percentage of the defoaming agent is 33.33%.

[0030] In a third aspect, the present invention provides a method for applying a perylene black slurry, comprising the following steps:

[0031] S20. Take the perylene black slurry in a jelly-like state;

[0032] S21. Dispersing the perylene black slurry in a gel-like state according to a third stirring rate and a third stirring time;

[0033] S22. Add 0.3% to 0.5% by weight of pH adjuster AM-95 to obtain a liquid aqueous black slurry of perylene.

[0034] As a possible implementation manner, the third stirring rate is 1000-1500 rpm, and the third stirring time is 10-15 minutes.

[0035] In a fourth aspect, the present invention provides an application of perylene black paste, and the perylene black paste is used to regulate high-spectrum camouflage materials.

[0036] Compared with the prior art, the beneficial effects of the present invention are:

[0037] 1. The perylene black slurry provided by the present invention is in a jelly state after production, which greatly improves the convenience of transportation and effectively avoids leakage and spillage accidents during transportation; when used, a pH regulator is added to convert it into a liquid water state, which is convenient for long-term stable storage and convenient for the design, preparation, production and application of color formulas.

[0038] 2. The perylene black slurry provided by the present invention does not contain resin, has good fluidity in liquid water state, small color difference, full hue, high stability, can be dissolved in most emulsions, will not have problems such as stratification, floating color, precipitation, etc., and can be used as a high-quality raw material for color paint. The finished paint made of it has uniform color and is easy to use and store.

[0039] 3. The preparation method of perylene black paste provided by the present invention can effectively inhibit the growth of mold and fungi by adding a mildew inhibitor, improve the mildew resistance of perylene black paste, and protect the integrity and aesthetics of the coating. Adding cellulose dissolved in the aqueous color paste has good thermal stability and chemical stability. This method enables the prepared perylene black paste to achieve appropriate viscosity and fluidity, prevents precipitation and separation, and improves the uniformity and long-term storage of perylene black paste.

[0040] 4. The method for preparing the perylene black slurry provided by the present invention controls the amount of each component and the parameters such as the grinding rate and time, so that the prepared perylene black slurry has moderate viscosity, and does not have the phenomena of stratification, precipitation, and anti-coarsening. The pH regulator AM-95 is added to the jelly-like perylene black slurry to obtain a steady-state fluid liquid. The jelly-like perylene black slurry is convenient for transportation, and the liquid water-like perylene black slurry is convenient for use, and can be well adapted to different application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0042] Figure 1 This is a flow chart of a method for preparing perylene black slurry provided in an embodiment of the present invention;

[0043] Figure 2 A comparison chart of the spectral reflectance of perylene black water-based coating, carbon black water-based coating, and iron black water-based coating provided as comparative examples of the present invention;

[0044] Figure 3 This is a comparison diagram of the spectral reflectance curve of the perylene black slurry provided in an embodiment of the present invention and a standard spectral curve. DETAILED DESCRIPTION

[0045] In order to clearly describe the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, words such as "first" and "second" are used to distinguish the same items or similar items with basically the same functions and effects. For example, the first threshold and the second threshold are only used to distinguish different thresholds, and their order is not limited. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit them to be different.

[0046] It should be noted that, in the present invention, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present invention should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0047] In the present invention, "at least one" means one or more, and "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. The character " / " generally indicates that the associated objects before and after are in an "or" relationship. The following at least one item (items) or similar expressions thereof refer to any combination of these items, including any combination of single items (items) or plural items (items). For example, at least one item (items) of a, b or c can mean: a, b, c, the combination of a and b, the combination of a and c, the combination of b and c, or the combination of a, b and c, where a, b, c can be single or multiple.

[0048] The present invention provides a perylene black slurry, a preparation method and an application method, which can solve the technical problems existing in the prior art such as difficulty in designing the visible light color formula of high-spectrum camouflage materials, limitation by the coating resin system and inconvenience in transportation.

[0049] In a first aspect, the present invention provides a perylene black paste, wherein the perylene black paste is defined as an initial state after production and during transportation, and the initial state is a jelly-like state; the perylene black paste is defined as a use state during pigment preparation, and the use state is a liquid water-like state;

[0050] The gel-like perylene black slurry comprises the following components by weight: 45% to 55% of deionized water, for example, 45%, 47%, 49%, 51%, 53%, and 55%; 5% to 8% of a wetting and dispersing agent, for example, 5%, 6%, 7%, and 8%; 35% to 45% of perylene black powder, for example, 35%, 37%, 39%, 41%, 43%, and 45%; and 0.2% to 0.5% of a defoaming agent. , 0.2%, 0.3%, 0.4%, 0.4%; mildew inhibitor 0.1%~0.3%, 0.1%, 0.2%, 0.3%; moisturizer 0.5%~2%, for example: 0.5%, 0.8%, 1%, 1.3%, 1.5%, 1.8%, 2%; HEC cellulose 0.5%~1%, for example 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, 1%;

[0051] The perylene black paste provided by the present invention can effectively inhibit the growth of mold and fungi by adding a mildew inhibitor, improve the mildew resistance of the perylene black paste, and protect the integrity and aesthetics of the coating. Adding cellulose and dissolving it in the aqueous color paste has good thermal stability and chemical stability. Cellulose can absorb a large amount of water molecules to play a thickening role and is often used as a rheology control agent in a low-viscosity system; it can effectively disperse the pigment, make the perylene black paste reach a suitable viscosity and fluidity, prevent precipitation and separation, and improve the uniformity and long-term storage of the perylene black paste.

[0052] The liquid water-like perylene black slurry is prepared by adding a pH regulator AM-95 to the above components after high-speed dispersion in a jelly-like state, with a weight ratio of 0.3% to 0.5%, for example: 0.3%, 0.35%, 0.4%, 0.45%, 0.5%.

[0053] pH regulator AM-95 can effectively control the pH value of the slurry, which can greatly improve the comprehensive performance of the coating and reduce costs.

[0054] The perylene black slurry provided by the present invention is in a jelly state after production, which greatly improves the convenience of transportation and effectively avoids leakage and spillage accidents during transportation; when used, a pH regulator is added to convert it into a liquid water state, which is convenient for long-term stable storage and convenient for the design, preparation, production and application of color formulas.

[0055] As a possible implementation, the wetting dispersant is a nonionic polymer copolymer dispersant containing pigment-affinity groups; and / or the index number of the perylene black powder is Pigment Black 32; and / or the defoaming agent is a mineral oil polyether; and / or the humectant is polyethylene glycol.

[0056] As a possible implementation method, the fineness of the gel-like perylene black slurry is 10 to 20 microns, for example, 10 microns, 11 microns, 12 microns, 13 microns, 14 microns, 15 microns, 16 microns, 17 microns, 18 microns, 19 microns, 20 microns; the solid content is 36% to 47%, for example, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%.

[0057] As a possible implementation method, the fineness of the liquid aqueous perylene black slurry is 10 to 20 microns, for example: 10 microns, 11 microns, 12 microns, 13 microns, 14 microns, 15 microns, 16 microns, 17 microns, 18 microns, 19 microns, 20 microns.

[0058] The perylene black slurry provided by the present invention does not contain resin, has good fluidity in liquid water state, small color difference, full hue, high stability, can be dissolved in most emulsions, does not have problems such as stratification, floating color, and precipitation, and can be used as a high-quality color paint raw material. The finished paint made of the perylene black slurry has uniform color and is easy to use and store.

[0059] In a second aspect, the present invention provides a method for preparing a perylene black paste, wherein the perylene black paste is the perylene black paste provided in the first aspect; Figure 1 , the preparation method comprises the following steps:

[0060] S10. Add a preset percentage of the total amount of deionized water to the dispersion tank, and then add the total amount of the wetting dispersant, the total amount of HEC cellulose, and the total amount of the defoaming agent. Disperse the mixture at a first stirring rate and a first stirring time, add the total amount of perylene black powder while stirring, and keep the first stirring rate unchanged for a second stirring time after the perylene black powder is added;

[0061] It should be explained that the above total amount is not the total amount of the perylene black slurry to be prepared, but the total amount of each component to be added. For example, the total amount of deionized water is a, the total amount of wetting and dispersing agent is b, the total amount of HEC cellulose is c, the total amount of defoaming agent is d, and the total amount of perylene black powder is e.

[0062] As a possible implementation, the preset percentage of deionized water is 90%, and the preset percentage of the defoaming agent is 33.33%; the first stirring rate is 800-1000rpm, for example: 800rpm, 850rpm, 900rpm, 950rpm, 1000rpm; the first stirring time is 5-8 minutes, for example: 5 minutes, 6 minutes, 7 minutes, 8 minutes; the second stirring time is 10-15 minutes, for example: 10 minutes, 11 minutes, 12 minutes, 13 minutes, 14 minutes, 15 minutes;

[0063] S11. The mixture obtained in step S10 is ground to a preset particle size at a preset grinding rate, and a defoamer is added to a preset percentage of the total amount during the grinding process;

[0064] As a possible implementation, the preset grinding rate is 2800-3000rpm, for example: 2800rpm, 2850rpm, 2900rpm, 2950rpm, 3000rpm; the preset particle size is less than or equal to 20 microns, for example: 5 microns, 10 microns, 15 microns, 20 microns; the preset percentage of the defoaming agent is 33.33%;

[0065] S12. After filtering the mixture obtained in S11, stirring at a second stirring rate, and sequentially adding the total amount of mildewcide, moisturizer, a preset percentage of the total amount of defoamer and the remaining deionized water while stirring;

[0066] As an example, the second stirring rate is 800-1000 rpm, for example, 800 rpm, 850 rpm, 900 rpm, 950 rpm, 1000 rpm.

[0067] As a possible implementation, the preset percentage of the defoaming agent is 33.33%.

[0068] S13. The mixture obtained in S12 is allowed to stand for a preset time to obtain a perylene black slurry in a jelly-like state.

[0069] As a possible implementation manner, the preset static time is 20 to 24 hours, for example: 20 hours, 20.5 hours, 21 hours, 21.5 hours, 22 hours, 22.5 hours, 23 hours, 23.5 hours, 24 hours;

[0070] In a third aspect, the present invention provides a method for applying a perylene black slurry, comprising the following steps:

[0071] S20. Take the perylene black slurry in a jelly-like state;

[0072] S21. Dispersing the perylene black slurry in a gel-like state according to a third stirring rate and a third stirring time;

[0073] S22. Add 0.3% to 0.5% by weight of pH adjuster AM-95 to obtain a liquid aqueous black slurry of perylene.

[0074] As a possible implementation method, the third stirring rate is 1000-1500rpm, for example: 1000rpm, 1100rpm, 1200rpm, 1300rpm, 1400rpm, 1500rpm; the third stirring time is 10-15 minutes, for example: 10 minutes, 11 minutes, 12 minutes, 13 minutes, 14 minutes, 15 minutes.

[0075] In a fourth aspect, the present invention provides an application of perylene black paste, and the perylene black paste is used to regulate high-spectrum camouflage materials.

[0076] To facilitate understanding of the technical solution of the present application, further explanation is provided below in conjunction with specific embodiments and comparative examples.

[0077] Example 1

[0078] The perylene black slurry was prepared by the following method:

[0079] 1. Prepare raw materials: prepare a total of 150g of deionized water, a total of 25g of wetting and dispersing agent (including 10g of wetting and dispersing agent HY236 and 15g of dispersing agent HY268), a total of 2g of HEC cellulose, a total of 1.5g of defoaming agent, a total of 145g of perylene black powder, a total of 0.5g of mildew inhibitor, and a total of 6g of moisturizing agent.

[0080] 2. Add 135g of deionized water to the dispersion tank, then add 10g of wetting dispersant HY236, 15g of dispersant HY268, and 0.5g of defoamer in sequence, stir at a stirring rate of 800rpm for 5 minutes, add 145g of perylene black powder while stirring, and keep stirring at a stirring rate of 1000rpm for 10 minutes after adding.

[0081] 3. Replace the grinding disc, add glass beads with a particle size of about 3 mm, and grind at a speed of 3000 rpm. Add 0.5 g of defoamer during the grinding process until the mixture is ground to a particle size below 20 microns, then stop grinding;

[0082] 4. After filtering the mixture obtained by grinding, stir at a speed of 1000 rpm, and add 0.5 g of mildew inhibitor, 6 g of moisturizer, the remaining defoamer, and the remaining 15 g of deionized water in sequence while stirring, and stir evenly;

[0083] 5. The mixture was allowed to stand for 24 hours to obtain a black jelly-like perylene slurry.

[0084] The perylene black slurry prepared in this embodiment has a fineness of 15 microns, a solid content of 47%, and a moderate viscosity, and no stratification, precipitation, or coarsening occurs. The color paste is mixed with polyurethane, acrylic acid, silicone and other emulsions, and no reaction occurs, and no floating color, blooming, or agglomeration occurs. After the gel-like perylene black slurry is dispersed at a rate of 1500 rpm for 15 minutes, it is a fluid liquid with a fineness of 16 microns, and no coarsening occurs. After stopping the dispersion, it slowly turns into a gel-like state. The gel-like perylene black slurry is dispersed at a rate of 1500 rpm for 15 minutes and 1.5 g of pH regulator AM-95 is added, and it is a steady-state fluid liquid without coagulation.

[0085] Example 2

[0086] The perylene black slurry was prepared by the following method:

[0087] 1. Prepare raw materials: prepare a total of 150g of deionized water, a total of 20g of wetting and dispersing agent (including 8g of wetting and dispersing agent HY236 and 12g of dispersing agent HY268), a total of 2g of HEC cellulose, a total of 1.5g of defoaming agent, a total of 120g of perylene black powder, a total of 0.5g of mildew inhibitor, and a total of 4g of moisturizing agent.

[0088] 2. Add 135g of deionized water to the dispersion tank, then add 8g of wetting dispersant HY236, 12g of dispersant HY268, and 0.5g of defoamer in sequence, stir at a stirring rate of 1000rpm for 8 minutes, add 120g of perylene black powder while stirring, and keep stirring at a stirring rate of 1000rpm for 15 minutes after adding.

[0089] 3. Replace the grinding disc, add glass beads with a particle size of about 3 mm, and grind at a speed of 2800 rpm. Add 0.5 g of defoamer during the grinding process until the mixture is ground to a particle size of 10 microns, then stop grinding;

[0090] 4. After filtering the mixture obtained by grinding, stir at a speed of 1000 rpm, and add 0.5 g of mildew inhibitor, 4 g of moisturizer, the remaining defoamer, and the remaining 15 g of deionized water in sequence while stirring, and stir evenly;

[0091] 5. The mixture was allowed to stand for 20 hours to obtain a black jelly-like perylene slurry.

[0092] The perylene black slurry prepared in this embodiment has a fineness of 15 microns, a solid content of 42%, and a moderate viscosity, and no stratification, precipitation, or coarsening occurs. The color paste is mixed with polyurethane, acrylic acid, silicone and other emulsions, and no reaction occurs, and no floating color, blooming, or agglomeration occurs. After the gel-like perylene black slurry is dispersed at a rate of 1500 rpm for 10 minutes, it is a fluid liquid with a fineness of 16 microns, and no coarsening occurs. After stopping the dispersion, it slowly turns into a gel-like state. The gel-like perylene black slurry is dispersed at a rate of 1500 rpm for 10 minutes and 1.5 g of pH regulator AM-95 is added, and it is a steady-state fluid liquid without coagulation.

[0093] Example 3

[0094] The perylene black slurry was prepared by the following method:

[0095] 1. Prepare raw materials: prepare a total of 150g of deionized water, a total of 15g of wetting and dispersing agent (including 5g of wetting and dispersing agent HY236 and 10g of dispersing agent HY268), a total of 2.5g of HEC cellulose, a total of 1g of defoaming agent, a total of 100g of perylene black powder, a total of 0.5g of mildew inhibitor, and a total of 2g of moisturizing agent.

[0096] 2. Add 145g of deionized water to the dispersion tank, then add 5g of wetting dispersant HY236, 10g of dispersant HY268, and 0.33g of defoamer in sequence, stir at a stirring rate of 900rpm for 7 minutes, add 120g of perylene black powder while stirring, and keep stirring at a stirring rate of 900rpm for 13 minutes after adding.

[0097] 3. Replace the grinding disc, add glass beads with a particle size of about 3 mm, and grind at a speed of 2900 rpm. Add 0.33 g of defoamer during the grinding process until the mixture is ground to a particle size of 15 microns, then stop grinding;

[0098] 4. After filtering the mixture obtained by grinding, stir at a speed of 800 rpm, and add 0.5 g of mildew inhibitor, 2 g of moisturizer, the remaining defoamer, and the remaining 15 g of deionized water in sequence while stirring, and stir evenly;

[0099] 5. The mixture was allowed to stand for 22 hours to obtain a perylene black slurry in a jelly-like state.

[0100] The perylene black slurry prepared in this embodiment has a fineness of 10 microns, a solid content of 38%, and a moderate viscosity, and no stratification, precipitation, or coarsening occurs. The color paste is mixed with polyurethane, acrylic acid, silicone and other emulsions, and no reaction occurs, and no floating color, blooming, or agglomeration occurs. After the gel-like perylene black slurry is dispersed at a rate of 1500 rpm for 10 minutes, it is a fluid liquid with a fineness of 12 microns, and no coarsening occurs. After stopping the dispersion, it slowly turns into a gel-like state. The gel-like perylene black slurry is dispersed at a rate of 1500 rpm for 10 minutes and 1g of pH regulator AM-95 is added, and it is a steady-state fluid liquid without coagulation.

[0101] Comparative Example 1

[0102] The carbon black slurry was prepared by the following method:

[0103] 1. Prepare raw materials: prepare a total of 150g of deionized water, a total of 15g of wetting and dispersing agent (including 5g of wetting and dispersing agent HY236 and 10g of dispersing agent HY268), a total of 2.5g of HEC cellulose, a total of 1g of defoaming agent, a total of 100g of carbon black powder, a total of 0.5g of mildew inhibitor, and a total of 2g of moisturizing agent.

[0104] 2. Add 135g of deionized water to the dispersion tank, then add 5g of wetting dispersant HY236, 10g of dispersant HY268, and 0.33g of defoaming agent in sequence, stir at a stirring rate of 900rpm for 7 minutes, add 100g of carbon black powder while stirring, and keep stirring at a stirring rate of 900rpm for 13 minutes after adding.

[0105] 3. Replace the grinding disc, add glass beads with a particle size of about 3 mm, and grind at a speed of 2900 rpm. Add 0.33 g of defoamer during the grinding process until the mixture is ground to a particle size of 15 microns, then stop grinding;

[0106] 4. After filtering the mixture obtained by grinding, stir at a speed of 800 rpm, and add 0.5 g of mildew inhibitor, 2 g of moisturizer, the remaining defoamer, and the remaining 15 g of deionized water in sequence while stirring, and stir evenly;

[0107] 5. The above mixture was left to stand for 24 hours, and the carbon black slurry was still in liquid water without coagulation, agglomeration, etc. The obtained carbon black slurry was dispersed at 1500 rpm for 10 minutes and 1.5 g of pH adjuster AM-95 was added, and it was still in a stable fluid liquid without other phenomena.

[0108] Comparative Example 2

[0109] The iron black slurry was prepared by the following method:

[0110] 1. Prepare raw materials: prepare a total of 150g of deionized water, a total of 20g of wetting and dispersing agent (including 8g of wetting and dispersing agent HY236 and 12g of dispersing agent HY268), a total of 2g of HEC cellulose, a total of 1.5g of defoaming agent, a total of 120g of iron black powder, a total of 0.5g of mildew inhibitor, and a total of 4g of moisturizing agent.

[0111] 2. Add 135g of deionized water to the dispersion tank, then add 8g of wetting dispersant HY236, 12g of dispersant HY268, and 0.5g of defoaming agent in sequence, stir at a stirring rate of 1000rpm for 8 minutes, add 120g of iron black powder while stirring, and keep stirring at a stirring rate of 1000rpm for 15 minutes after adding.

[0112] 3. Replace the grinding disc, add glass beads with a particle size of about 3 mm, and grind at a speed of 2800 rpm. Add 0.5 g of defoamer during the grinding process until the mixture is ground to a particle size of 10 microns, then stop grinding;

[0113] 4. After filtering the mixture obtained by grinding, stir at a speed of 1000 rpm, and add 0.5 g of mildew inhibitor, 4 g of moisturizer, the remaining defoamer, and the remaining 15 g of deionized water in sequence while stirring, and stir evenly;

[0114] 5. The mixture was allowed to stand for 20 hours to obtain a liquid flowing iron black slurry. The mixture was dispersed at 1500 rpm for 10 minutes and 1.5 g of pH regulator AM-95 was added. The mixture was still a stable flowing liquid without coagulation.

[0115] Comparative Example 3

[0116] The perylene black slurry was prepared by the following method:

[0117] 1. Prepare raw materials: prepare a total of 150g of deionized water, a total of 15g of wetting and dispersing agent (including 5g of wetting and dispersing agent HY236 and 10g of dispersing agent HY268), a total of 2.5g of HEC cellulose, a total of 1g of defoaming agent, a total of 40g of perylene black powder, a total of 0.5g of mildew inhibitor, and a total of 2g of moisturizing agent.

[0118] 2. Add 135g of deionized water to the dispersion tank, then add 5g of wetting dispersant HY236, 10g of dispersant HY268, and 0.33g of defoamer in sequence, stir at a stirring rate of 900rpm for 7 minutes, add 40g of perylene black powder while stirring, and keep stirring at a stirring rate of 900rpm for 13 minutes after adding.

[0119] 3. Replace the grinding disc, add glass beads with a particle size of about 3 mm, and grind at a speed of 2900 rpm. Add 0.33 g of defoamer during the grinding process until the mixture is ground to a particle size of 15 microns, then stop grinding;

[0120] 4. After filtering the mixture obtained by grinding, stir at a speed of 800 rpm, and add 0.5 g of mildew inhibitor, 2 g of moisturizer, the remaining defoamer, and the remaining 15 g of deionized water in sequence while stirring, and stir evenly;

[0121] 5. The mixture was allowed to stand for 22 hours to obtain a liquid perylene black slurry.

[0122] The perylene black paste prepared in this embodiment has a fineness of 10 microns and a solid content of 20% after testing, and no stratification, precipitation, coarsening, etc. The color paste was mixed with polyurethane, acrylic acid, silicone and other emulsions, and no reaction occurred, and no floating color, blooming, agglomeration, etc. were observed. After the prepared perylene black paste was dispersed at a rate of 1500 rpm for 10 minutes, the perylene black paste in a fluid liquid state was dispersed at a rate of 1500 rpm for 10 minutes and 1g of pH adjuster AM-95 was added, and it was still a steady-state fluid liquid without coagulation.

[0123] The comparison of the initial state of the color paste prepared in the embodiment of the present invention and the comparative example and the state after adding the pH adjuster is shown in Table 1.

[0124] Table 1 Comparison of Examples and Comparative Examples

[0125]

[0126] Color paste reflectivity test: Take 5 parts of polyurethane emulsion and 1 part of color paste prepared in comparative example, and apply them on black and white cardboard using a 100 micron wet film preparation device. After drying, use a UV-visible-near infrared spectrophotometer to test the spectral reflectivity of the paint film on the white cardboard. The test results are as follows: Figure 2 shown.

[0127] See also Figures 2 to 3 Perylene black has a very high infrared reflectivity and a "red edge" similar to that of green vegetation, which has obvious advantages in simulating the spectral reflectivity characteristics of green vegetation, while carbon black and iron black have very low infrared reflectivity and are not suitable for simulating the color of green vegetation. When perylene black is a single-color paste, it has two obvious advantages: 1. It can be mixed with other pigment pastes to mix various green colors and simulate the color of vegetation in different environments and periods; 2. It is not limited to the type of resin. As long as the resin can be used with it, it can be used in a variety of environments such as scraping, spraying, silk screen printing, etc.

[0128] Although the present invention is described herein in conjunction with various embodiments, in the process of implementing the claimed invention, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the drawings, etc. In the specification, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor or other unit can implement several functions listed in the specification. Certain measures are recorded in different embodiments, but this does not mean that these measures cannot be combined to produce good results.

[0129] Although the present invention has been described in conjunction with specific features and embodiments thereof, it is apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the present invention. Accordingly, this specification and the accompanying drawings are merely exemplary illustrations of the present invention and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present invention. Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, the present invention is intended to include such modifications and variations if they fall within the scope of the present invention and its equivalents.

Claims

1. A perylene black slurry, characterized in that: The perylene black paste is defined as an initial state after production and during transportation, and the initial state is a jelly state; the perylene black paste is defined as a use state during pigment preparation, and the use state is a liquid water state; The jelly-like perylene black slurry comprises the following components by weight: 45% to 55% of deionized water, 5% to 8% of a wetting and dispersing agent, 35% to 45% of perylene black powder, 0.2% to 0.5% of a defoaming agent, 0.1% to 0.3% of a mildewproofing agent, 0.5% to 2% of a moisturizing agent, and 0.5% to 1% of HEC cellulose; The liquid water-like perylene black slurry is prepared by adding a pH regulator AM-95 to the above components after being dispersed at high speed in a jelly-like state, with a weight ratio of 0.3% to 0.5%.

2. The perylene black slurry according to claim 1, characterized in that: The wetting and dispersing agent is a non-ionic polymer copolymer dispersant containing pigment-affinity groups; and / or, The index number of the perylene black powder is Pigment Black 32; and / or, The defoamer is a mineral oil polyether; and / or, The humectant is polyethylene glycol.

3. The perylene black slurry according to claim 1, characterized in that: The fineness of the jelly-like perylene black slurry is 10 to 20 microns, and the solid content is 36% to 47%.

4. The perylene black slurry according to any one of claims 1 to 3, characterized in that: The fineness of the liquid water-like perylene black slurry is 10 to 20 microns.

5. A method for preparing perylene black slurry, characterized in that: The perylene black paste is the perylene black paste according to any one of claims 1 to 4; the preparation method comprises the following steps: S10. Add a preset percentage of the total amount of deionized water to the dispersion tank, and then add the total amount of the wetting dispersant, the total amount of HEC cellulose, and the total amount of the defoaming agent. Disperse the mixture at a first stirring rate and a first stirring time, add the total amount of perylene black powder while stirring, and keep the first stirring rate unchanged for a second stirring time after the perylene black powder is added; S11. The mixture obtained in step S10 is ground to a preset particle size at a preset grinding rate, and a defoamer is added to a preset percentage of the total amount during the grinding process; S12. After filtering the mixture obtained in S11, stirring at a second stirring rate, and sequentially adding the total amount of mildewcide, moisturizer, a preset percentage of the total amount of defoamer and the remaining deionized water while stirring; S13. The mixture obtained in S12 is allowed to stand for a preset time to obtain a perylene black slurry in a jelly-like state.

6. The method for preparing perylene black slurry according to claim 5, characterized in that: In S10, the first stirring rate is 800-1000 rpm, the first stirring time is 5-8 minutes, and the second stirring time is 10-15 minutes; and / or, In S11, the preset grinding rate is 2800-3000 rpm, and the preset particle size is less than or equal to 20 microns; and / or, In S12, the second stirring rate is 800-1000 rpm; and / or, In S13, the preset time for standing still is 20 to 24 hours.

7. The method for preparing perylene black slurry according to claim 5, characterized in that: In S10, the preset percentage of deionized water is 90%, and the preset percentage of defoaming agent is 33.33%; In S11, the preset percentage of defoamer is 33.33%; In S12, the preset percentage of the defoaming agent is 33.33%.

8. A method for applying perylene black slurry, characterized in that: The steps include: S20. Take the perylene black slurry in a jelly-like state; S21. Dispersing the perylene black slurry in a gel-like state according to a third stirring rate and a third stirring time; S22. Add 0.3% to 0.5% by weight of pH adjuster AM-95 to obtain a liquid aqueous black slurry of perylene.

9. The method for applying perylene black slurry according to claim 8, characterized in that: The third stirring rate is 1000-1500 rpm, and the third stirring time is 10-15 minutes.

10. An application of perylene black slurry, characterized in that: The perylene black slurry is used for regulating high-spectrum camouflage materials.

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