Dark green water-based acrylic acid high-performance optical camouflage coating and preparation method thereof

Abstract

The invention relates to the technical field of camouflage coatings, in particular to a dark green water-based acrylic acid high-performance optical camouflage coating, which is prepared from the following raw material components in parts by weight: 7 to 14 parts of double-component emulsion, 7 to 14 parts of single-component emulsion, 2 to 4 parts of propylene glycol, 1 to 1.2 parts of dispersing agent, 0.3 to 0.6 part of wetting agent, 0.3 to 0.6 part of defoaming agent, 22 to 25 parts of dark green pigment, 12 to 14 parts of chrome green and 0.2 to 0.6 part of orange. The camouflage coating is prepared from the following components in parts by weight: 0.3-0.4 part of iron oxide yellow, 1-1.2 parts of iron oxide red, 0.6-0.8 part of iron oxide black, 0-5 parts of talcum powder, 0.8-1.2 parts of a coalescing agent, 0.6-1.2 parts of a thickening agent and 20-30 parts of deionized water. According to the camouflage coating disclosed by the invention, a mixture of the water-based polyacrylate emulsion, the ethylene vinyl acetate copolymer emulsion and the silicone acrylic emulsion is used as a dispersion according to a certain proportion; after being prepared into a dark green camouflage coating film, the dispersion has the advantages of good adhesive force, good anti-sagging property, acid and alkali resistance and the like, and the adaptability of a construction environment is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of camouflage coatings, in particular to a dark green water-based acrylic high-performance optical camouflage coating and a preparation method thereof. Background Art

[0002] In recent years, with the introduction of numerous national environmental protection policies, environmentally friendly and green coating requirements have gradually increased both within and outside the military. Water-based camouflage coatings have gradually replaced traditional solvent-based camouflage coatings in the market. However, in complex environments such as plateaus and coastal areas, the physical and chemical properties of water-based camouflage coatings still lag far behind those of solvent-based camouflage coatings. This is especially true for dark green camouflage coatings, where the presence of metal oxides can easily lead to reduced acid and alkali resistance and weather resistance. Therefore, the development of an environmentally friendly, high-performance dark green water-based optical camouflage coating has become a current research hotspot.

[0003] Water-based acrylic camouflage coatings have been widely used in the camouflage coating field due to their advantageous properties, including ease of processing, environmental friendliness, low cost, and resistance to water, salt, and aging. However, existing conventional water-based acrylic coatings include anionic, cationic, and nonionic types. Anionic water-based acrylic coatings suffer from reduced acid and water resistance due to the presence of negatively charged groups (such as carboxylic acid groups). Cationic water-based acrylic coatings contain quaternary ammonium monomers or cationic groups, which results in insufficient alkali resistance. Non-ionic water-based acrylic emulsions contain polyoxyethylene ether surfactants, which remain in the coating after film formation, ultimately resulting in insufficient mechanical strength and adhesion. Therefore, improvements are needed. Summary of the Invention

[0004] The object of the present invention is to provide a dark green water-based acrylic high-performance optical camouflage coating and a preparation method thereof, so as to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A dark green water-based acrylic high-performance optical camouflage coating comprises the following raw material components in parts by weight: 7-14 parts of a two-component emulsion, 7-14 parts of a single-component emulsion, 2-4 parts of propylene glycol, 1-1.2 parts of a dispersant, 0.3-0.6 parts of a wetting agent, 0.3-0.6 parts of a defoamer, 22-25 parts of a dark green pigment, 12-14 parts of chrome green, 0.2-0.6 parts of orange yellow, 0.3-0.4 parts of iron oxide yellow, 1-1.2 parts of iron oxide red, 0.6-0.8 parts of iron oxide black, 0-5 parts of talc, 0.8-1.2 parts of a film-forming aid, 0.6-1.2 parts of a thickener, and 20-30 parts of deionized water.

[0006] Preferably, it comprises the following raw material components in parts by weight: 10-14 parts of a two-component emulsion, 10-14 parts of a one-component emulsion, 2-3 parts of propylene glycol, 1.1-1.2 parts of a dispersant, 0.3-0.5 parts of a wetting agent, 0.3-0.4 parts of a defoaming agent, 22-24 parts of a dark green pigment, 12-13 parts of a chrome green, 0.2-0.5 parts of an orange, 0.3-0.4 parts of an iron yellow, 1-1.1 parts of an iron red, 0.7-0.8 parts of an iron black, 4-5 parts of talc, 1-1.2 parts of a film-forming aid, 0.6-1 parts of a thickener, and 23-27 parts of deionized water.

[0007] Preferably, it contains the following raw material components in parts by weight: 14 parts of two-component emulsion, 14 parts of one-component emulsion, 2 parts of propylene glycol, 1.2 parts of dispersant, 0.3 parts of wetting agent, 0.3 parts of defoaming agent, 22 parts of dark green pigment, 12 parts of chrome green, 0.6 parts of orange, 0.3 parts of iron yellow, 1 part of iron red, 0.8 parts of iron black, 5 parts of talc, 1.2 parts of film-forming aid, 0.6 parts of thickener, and 24 parts of deionized water.

[0008] Furthermore, the two-component emulsion includes polyacrylate emulsion and ethylene vinyl acetate copolymer emulsion; and the one-component emulsion includes silicone acrylic emulsion.

[0009] Furthermore, the dispersant includes sodium polycarboxylate; the wetting agent is alkylphenol polyoxyethylene ether; and the defoaming agent is silicone polyether modified mineral oil.

[0010] Furthermore, the dark green pigment is one or more of zinc-cobalt metal oxides, cobalt-chromium oxides or cobalt-aluminum oxides; the chrome green pigment is chromium trioxide; the orange pigment is one or more of zinc-iron oxides or titanium chrome yellow; the iron yellow pigment is hydrated iron oxide; the iron red pigment is iron oxide; and the iron black pigment is ferroferric oxide.

[0011] Furthermore, the talc is hydrated magnesium silicate; the film-forming aid is one or more of alcohol ester lauryl and propylene glycol monobutyl ether; and the thickener is one or more of polyurethane-modified polyether associative thickeners or acrylic acid base thickeners.

[0012] A method for preparing a dark green water-based acrylic high-performance optical camouflage coating comprises the following steps: S1. Weigh each component according to mass ratio; S2. Mix a portion of the deionized water and defoaming agent with the entire amount of propylene glycol, dispersant, and wetting agent and stir to disperse uniformly to obtain a mixed solution 1; S3, under stirring, adding all the formula amounts of dark green pigment, chrome green, orange, iron yellow, iron red, iron black and talcum powder to the mixed solution one, stirring and dispersing them evenly to obtain a premixed slurry, and grinding the premixed slurry at room temperature to obtain a mixed solution two; S4. Mixing the second mixed solution with the entire amount of the two-component emulsion and the one-component emulsion under stirring, and then adding the entire amount of the film-forming aid and the remaining amount of the defoaming agent to obtain a third mixed solution; S5. Under stirring, add the entire amount of thickener and the remaining amount of deionized water to the mixed solution 3, and disperse them evenly to obtain a dark green water-based acrylic high-performance optical camouflage coating.

[0013] The stirring speed in step S2 is 400-600 r / min, and the stirring time is 10-15 min; the stirring speed in step S3 is 600-800 r / min, and the stirring time is 20-30 min, and the grinding is grinding the premixed slurry to a fineness of less than 100 microns by a conical mill; the stirring speed in step S4 is 800-1000 r / min, and the stirring time is 30-40 min; the stirring speed in step S5 is 1000-1200 r / min, and the stirring time is 30-40 min.

[0014] Compared with the prior art, the present invention has the following beneficial effects: First of all, the dark green water-based acrylic high-performance optical camouflage coating of the present application uses a mixture of water-based polyacrylate emulsion, ethylene vinyl acetate copolymer emulsion and silicone acrylic emulsion in a certain proportion as a dispersion. After the dispersion is made into a dark green camouflage coating film, it has the advantages of good adhesion, good anti-sagging properties, and acid and alkali resistance, ensuring adaptability to the construction environment.

[0015] Secondly, the dark green water-based acrylic high-performance optical camouflage coating of the present application uses all inorganic pigments, and has excellent aging resistance while ensuring that the color is similar to the optical characteristics of the green background.

[0016] Again, the dark green water-based acrylic high-performance optical camouflage coating of this application uses a polyurethane-modified polyether associative thickener and an acrylic base thickener in a certain proportion, which solves the problem of poor leveling and uniformity of the coating due to the heavy weight of dark green inorganic pigments.

[0017] Finally, the dark green water-based acrylic high-performance optical camouflage coating of the present application has an adhesion level of 1, a flexibility of 1mm, an impact resistance of 100 cm, a pencil hardness of H, and resistance to 3% NaCl solution for 360 hours without blistering, wrinkling, peeling, or discoloration. It can withstand H2O for 480 hours without blistering, wrinkling, peeling, or discoloration. It can withstand 0.05mol / LH2SO4 for 240 hours without blistering, wrinkling, peeling, or discoloration. It can withstand 0.1 mol / L NaOH for 240 hours without blistering, wrinkling, peeling, or discoloration. After aging resistance for 760 hours, it reaches level 0 in the 5.2 rating of GB / T1766-2008. After temperature change resistance for 720 hours, it reaches level 1 in the 5.2 rating of GB / T1766-2008. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram showing the comparison of the acid resistance of the coating before and after the acid resistance test in Example 1 of the present invention.

[0019] Figure 2 Schematic diagram showing the comparison of the alkali resistance of the coating before and after the test in Example 1 of the present invention. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] The present invention provides the following technical solutions: A dark green water-based acrylic high-performance optical camouflage coating comprises the following raw material components in parts by weight: 7-14 parts of a two-component emulsion, 7-14 parts of a single-component emulsion, 2-4 parts of propylene glycol, 1-1.2 parts of a dispersant, 0.3-0.6 parts of a wetting agent, 0.3-0.6 parts of a defoamer, 22-25 parts of a dark green pigment, 12-14 parts of chrome green, 0.2-0.6 parts of orange yellow, 0.3-0.4 parts of iron oxide yellow, 1-1.2 parts of iron oxide red, 0.6-0.8 parts of iron oxide black, 0-5 parts of talc, 0.8-1.2 parts of a film-forming aid, 0.6-1.2 parts of a thickener, and 20-30 parts of deionized water.

[0022] Specifically, the two-component emulsion can be 7, 10, or 14 parts by weight, the one-component emulsion can be 10, 12, or 14 parts by weight, the propylene glycol can be 2, 3, or 4 parts by weight, the dispersant can be 1, 1.1, or 1.2 parts by weight, the wetting agent can be 0.3, 0.45, or 0.6 parts by weight, the defoamer can be 0.3, 0.45, or 0.6 parts by weight, the dark green pigment can be 22, 23, or 25 parts by weight, and the chrome green can be 12, 13, or 14 parts by weight. The amount of orange can be 0.2, 0.4, and 0.6 parts by weight, iron oxide yellow can be 0.3, 0.35, and 0.4 parts by weight, iron oxide red can be 1, 1.1, and 1.2 parts by weight, iron black can be 0.6, 0.7, and 0.8 parts by weight, talc can be 1, 3, and 5 parts by weight, film-forming aids can be 0.8, 1, and 1.2 parts by weight, thickeners can be 0.6, 1, and 1.2 parts by weight, and deionized water can be 20, 25, and 30 parts by weight.

[0023] Preferably, it comprises the following raw material components in parts by weight: 10-14 parts of a two-component emulsion, 10-14 parts of a one-component emulsion, 2-3 parts of propylene glycol, 1.1-1.2 parts of a dispersant, 0.3-0.5 parts of a wetting agent, 0.3-0.4 parts of a defoaming agent, 22-24 parts of a dark green pigment, 12-13 parts of a chrome green, 0.2-0.5 parts of an orange, 0.3-0.4 parts of an iron yellow, 1-1.1 parts of an iron red, 0.7-0.8 parts of an iron black, 4-5 parts of talc, 1-1.2 parts of a film-forming aid, 0.6-1 parts of a thickener, and 23-27 parts of deionized water.

[0024] More preferably, it comprises the following raw material components in parts by weight: 14 parts of two-component emulsion, 14 parts of one-component emulsion, 2 parts of propylene glycol, 1.2 parts of dispersant, 0.3 parts of wetting agent, 0.3 parts of defoaming agent, 22 parts of dark green pigment, 12 parts of chrome green, 0.6 parts of orange, 0.3 parts of iron yellow, 1 part of iron red, 0.8 parts of iron black, 5 parts of talc, 1.2 parts of film-forming aid, 0.6 parts of thickener, and 24 parts of deionized water.

[0025] Furthermore, the two-component emulsion includes polyacrylate emulsion and ethylene vinyl acetate copolymer emulsion; and the one-component emulsion includes silicone acrylic emulsion.

[0026] Furthermore, the dispersant includes sodium polycarboxylate; the wetting agent is alkylphenol polyoxyethylene ether; and the defoaming agent is silicone polyether modified mineral oil.

[0027] Furthermore, the dark green pigment is one or more of zinc-cobalt metal oxides, cobalt-chromium oxides or cobalt-aluminum oxides; the chrome green pigment is chromium trioxide; the orange pigment is one or more of zinc-iron oxides or titanium chrome yellow; the iron yellow pigment is hydrated iron oxide; the iron red pigment is iron oxide; and the iron black pigment is ferroferric oxide.

[0028] Furthermore, the talc is hydrated magnesium silicate; the film-forming aid is one or more of alcohol ester lauryl and propylene glycol monobutyl ether; and the thickener is one or more of polyurethane-modified polyether associative thickeners or acrylic acid base thickeners.

[0029] The present invention also provides a method for preparing a dark green water-based acrylic high-performance optical camouflage coating, comprising the following steps: S1. Weigh each component according to mass ratio; S2, a portion of the deionized water, defoaming agent and the entire amount of propylene glycol, dispersant, wetting agent were mixed, and the mixture was stirred and dispersed at a speed of 400-600 r / min for 10-15 min to obtain a mixed solution 1; S3, at a speed of 600-800 r / min, add all the formula amounts of dark green pigment, chrome green, orange, iron yellow, iron red, iron black, and talcum powder to the mixed solution 1, stir and disperse for 20-30 minutes to obtain a premixed slurry, and grind the premixed slurry at room temperature to less than 100 microns to obtain a mixed solution 2; S4, at a rotation speed of 800-1000 r / min, mixing the mixed solution 2 with the entire amount of the two-component emulsion and the one-component emulsion, adding the entire amount of the film-forming aid and the remaining amount of the defoamer, and stirring for 30-40 minutes to obtain a mixed solution 3; S5. At a rotation speed of 1000-1200 r / min, add the entire amount of thickener and the remaining amount of deionized water to the mixed solution 3, and disperse for 30-40 minutes to obtain a dark green water-based acrylic high-performance optical camouflage coating.

[0030] The following is a detailed description with reference to specific embodiments: Example 1: Dark green water-based acrylic high-performance optical camouflage coating formula: 20g per weight portion, 14 weight portions of two-component emulsion, 14 weight portions of one-component emulsion, 2 weight portions of propylene glycol, 1.2 weight portions of dispersant, 0.3 weight portions of wetting agent, 0.3 weight portions of defoaming agent, 22 weight portions of dark green pigment, 12 weight portions of chrome green, 0.6 weight portions of orange, 0.3 weight portions of iron yellow, 1 weight portion of iron red, 0.8 weight portions of iron black, 5 weight portions of talc, 1.2 weight portions of film-forming aid, 0.6 weight portion of thickener, and 24 weight portions of deionized water.

[0031] Preparation process of dark green water-based acrylic high-performance optical camouflage coating: (1) Weigh each component according to the mass ratio; (2) 12 parts by weight of deionized water, 0.2 parts by weight of a defoaming agent, and the entire amount of propylene glycol, a dispersant, and a wetting agent were mixed, and the mixture was stirred and dispersed at a speed of 600 r / min for 15 minutes to obtain a mixed solution 1; (3) Add all the formulated amounts of dark green pigment, chrome green, orange, iron yellow, iron red, iron black, and talcum powder to the mixed solution 1 at a speed of 600 r / min, adjust the speed to 800 r / min, and stir and disperse for 30 minutes to obtain a premixed slurry. Grind the premixed slurry to less than 100 microns using a conical mill at room temperature to obtain a mixed solution 2; (4) Mixing the mixed solution 2 with the entire amount of the two-component emulsion and the one-component emulsion at a rotation speed of 1000 r / min, adding the entire amount of the film-forming aid and the remaining amount of the defoamer, and stirring for 30 minutes to obtain a mixed solution 3; (5) Adjust the speed to 1200 r / min, add the entire amount of thickener and the remaining amount of deionized water into the mixture 3, and disperse for 30 minutes to obtain a dark green water-based acrylic high-performance optical camouflage coating.

[0032] Example 2: Dark green water-based acrylic high-performance optical camouflage coating formula: 20g per weight portion, 7 weight portions of two-component emulsion, 21 weight portions of one-component emulsion, 2 weight portions of propylene glycol, 1.6 weight portions of dispersant, 0.3 weight portion of wetting agent, 0.3 weight portion of defoaming agent, 21 weight portions of dark green pigment, 15 weight portions of chrome green, 0.6 weight portion of orange, 0.3 weight portion of iron yellow, 0.5 weight portion of iron red, 0.8 weight portion of iron black, 3 weight portions of talc, 1.2 weight portions of film-forming aid, 0.3 weight portion of thickener, and 25.1 weight portions of deionized water.

[0033] Preparation process of dark green water-based acrylic high-performance optical camouflage coating: (1) Weigh each component according to the mass ratio; (2) 10 parts by weight of deionized water, 0.1 parts by weight of a defoaming agent, and the entire amount of propylene glycol, a dispersant, and a wetting agent were mixed, and the mixture was stirred and dispersed at a speed of 300 r / min for 15 minutes to obtain a mixed solution 1; (3) Add all the formulated amounts of dark green pigment, chrome green, orange, iron yellow, iron red, iron black, and talcum powder to the mixed solution 1 at a speed of 300 r / min, adjust the speed to 600 r / min, and stir and disperse for 30 min to obtain a premixed slurry. Grind the premixed slurry to less than 100 μm using a conical mill at room temperature to obtain a mixed solution 2; (4) Mix the mixed solution 2 with the entire amount of the two-component emulsion and the one-component emulsion at a rotation speed of 800 r / min, add the entire amount of the film-forming aid and the remaining amount of the defoamer, and stir for 30 min to obtain the mixed solution 3; (5) Adjust the speed to 1000 r / min, add the entire amount of thickener and the remaining amount of deionized water into the mixture 3, and disperse for 30 minutes to obtain a dark green water-based acrylic high-performance optical camouflage coating.

[0034] Comparative Example 1: A dark green water-based acrylic high-performance optical camouflage coating was prepared in the same manner as in Example 1, except that, in the coating composition, the two-component emulsion accounted for 28 parts by weight and the single-component emulsion accounted for 0 parts by weight.

[0035] Comparative Example 2: A dark green water-based acrylic high-performance optical camouflage coating was prepared in the same manner as in Example 1, except that, in the coating composition, the weight portion of the two-component emulsion was 0 parts, and the weight portion of the single-component emulsion was 28 parts.

[0036] Comparative Example 3: A dark green water-based acrylic high-performance optical camouflage coating was prepared in the same manner as in Example 1, except that, among the coating components, the dark green pigment was organic phthalocyanine green.

[0037] Performance test: The surface of the tinplate sheet was polished, and the coatings of Examples 1-2 and Comparative Examples 1-3 were applied on the substrate respectively. After the surface was completely dry, a second coat was applied. The coating was dried at room temperature for 72 hours to obtain a coating with a dry film thickness of 30 μm.

[0038] Conventional mechanical property tests: According to the testing standard of GB / T1720, the adhesion of the coatings of Examples 1-2 and Comparative Examples 1-3 was tested; according to the testing standard of GB / T1731, the flexibility of the coatings of Examples 1-2 and Comparative Examples 1-3 was tested; according to the testing standard of GB / T1732, the impact resistance of the coatings of Examples 1-2 and Comparative Examples 1-3 was tested; according to the testing standard of GB / T6739, the pencil hardness of the coatings of Examples 1-2 and Comparative Examples 1-3 was tested.

[0039] Water resistance test: According to the testing standard of GB / T1733, the water resistance of the coatings of Examples 1-2 and Comparative Examples 1-3 was tested.

[0040] Acid, alkali and salt resistance test: According to the testing standard of GB / T9274, the acid resistance, alkali resistance and salt water resistance of the coatings of Examples 1-2 and Comparative Examples 1-3 were tested.

[0041] Aging resistance test: According to the testing standard of GB / T1865, the aging resistance of the coatings of Examples 1-2 and Comparative Examples 1-3 was tested.

[0042] Temperature variation resistance test: According to the testing standard of JG / T 25-2017, the temperature variation resistance of the coatings of Examples 1-2 and Comparative Examples 1-3 was tested.

[0043] Adhesion / level (circle method) Flexibility / mm Impact resistance (cm) Pencil hardness Water resistance (480h) Acid resistance (immersed in 0.05mol / LH2SO4 solution for 240h) Alkali resistance (immersed in 0.1NaOH solution for 240h) Salt resistance (immersion in 3% NaCl solution for 360 hours) Artificial aging resistance / grade (760h) Temperature change resistance / grade (720h, 30 cycles in total) Example 1 1 1 100 H No bubbles, wrinkles, peeling or discoloration No bubbles, wrinkles, peeling or discoloration No bubbles, wrinkles, peeling or discoloration No bubbles, wrinkles, peeling or discoloration 0 1 Example 2 1 1 100 H No bubbles, wrinkles, peeling or discoloration No bubbles, wrinkles, peeling or discoloration No bubbles, wrinkles, peeling or discoloration No bubbles, wrinkles, peeling or discoloration 1 1 Comparative Example 1 1 1 50 H No bubbles, wrinkles, peeling or discoloration Bubbling, no shedding, slight discoloration No bubbles, wrinkles, peeling or discoloration No bubbles, wrinkles, peeling or discoloration 1 1 Comparative Example 2 2 1 100 HB No bubbles, wrinkles, peeling or discoloration No bubbles, wrinkles, peeling or discoloration No bubbling, no shedding, no discoloration No bubbles, wrinkles, peeling or discoloration 0 1 Comparative Example 3 1 1 50 H No bubbles, wrinkles, peeling or discoloration No blistering, wrinkling, shedding or yellowing No bubbles, wrinkles, peeling or discoloration No bubbles, wrinkles, peeling or discoloration 3 1 Note: The artificial aging resistance and temperature change resistance performance rating are both based on the 5.2 rating in GB / T1766-2008. According to Example 1, Example 2 and Comparative Example 1, it can be seen that the addition of the one-component silicone acrylic emulsion improves the impact resistance and acid resistance of the coating. This is because the silane monomer contained in the silicone acrylic emulsion is hydrolyzed and condensed during the film formation process to form a three-dimensional cross-linked network structure, which makes up for the film surface defects caused by the use of the two-component emulsion alone, forms a denser coating film, and has better pigment encapsulation, preventing the metal oxide in the pigment from reacting with the acidic solution to form a metal salt, and the coating has excellent impact resistance and acid resistance.

[0044] According to Examples 1 and 2, and Comparative Example 2, the addition of the two-component emulsion improves the coating's color adhesion, pencil hardness, and alkali resistance. This is because the carboxyl and hydroxyl groups in the two-component emulsion form ionic or hydrogen bonds when forming a film on the substrate, improving adhesion. Furthermore, the two-component emulsion combines with the silicone-acrylic emulsion to form a denser and more stable coating, improving its hardness and alkali resistance.

[0045] According to Example 1, Example 2 and Comparative Example 3, it can be seen that inorganic green pigments have better aging resistance than organic green pigments. This is mainly because under long-term ultraviolet light irradiation, the molecular chains in organic phthalocyanine green break, which eventually leads to powdering and cracking of the coating.

[0046] The dark green water-based acrylic high-performance optical camouflage coating of the present invention can be used for camouflage painting of buildings and equipment in complex environments in plateaus and coastal areas, and can also be used for exterior wall decoration of civil buildings.

[0047] Attachment Figure 1 This is a comparison of the acid resistance test of the coating of Example 1 before and after (the left picture is before the test, and the right picture is after the test).

[0048] Attachment Figure 2 This is a comparison of the alkali resistance test of the coating of Example 1 before and after (the left picture is before the test, and the right picture is after the test).

Claims

1. A dark green water-based acrylic high-performance optical camouflage coating, characterized in that: The invention comprises the following raw material components in parts by weight: 7-14 parts of a two-component emulsion, 7-14 parts of a one-component emulsion, 2-4 parts of propylene glycol, 1-1.2 parts of a dispersant, 0.3-0.6 parts of a wetting agent, 0.3-0.6 parts of a defoaming agent, 22-25 parts of a dark green pigment, 12-14 parts of a chrome green, 0.2-0.6 parts of an orange, 0.3-0.4 parts of an iron oxide yellow, 1-1.2 parts of an iron oxide red, 0.6-0.8 parts of an iron oxide black, 0-5 parts of talc, 0.8-1.2 parts of a film-forming aid, 0.6-1.2 parts of a thickener, and 20-30 parts of deionized water.

2. The dark green water-based acrylic high-performance optical camouflage coating according to claim 1, characterized in that: The invention comprises the following raw material components in parts by weight: 10-14 parts of a two-component emulsion, 10-14 parts of a one-component emulsion, 2-3 parts of propylene glycol, 1.1-1.2 parts of a dispersant, 0.3-0.5 parts of a wetting agent, 0.3-0.4 parts of a defoaming agent, 22-24 parts of a dark green pigment, 12-13 parts of a chrome green, 0.2-0.5 parts of an orange, 0.3-0.4 parts of an iron oxide yellow, 1-1.1 parts of an iron oxide red, 0.7-0.8 parts of an iron oxide black, 4-5 parts of talc, 1-1.2 parts of a film-forming aid, 0.6-1 parts of a thickener, and 23-27 parts of deionized water.

3. The dark green water-based acrylic high-performance optical camouflage paint according to claim 2, characterized in that: The invention comprises the following raw material components in parts by weight: 14 parts of two-component emulsion, 14 parts of one-component emulsion, 2 parts of propylene glycol, 1.2 parts of dispersant, 0.3 parts of wetting agent, 0.3 parts of defoaming agent, 22 parts of dark green pigment, 12 parts of chrome green, 0.6 parts of orange, 0.3 parts of iron yellow, 1 part of iron red, 0.8 parts of iron black, 5 parts of talc, 1.2 parts of film-forming aid, 0.6 parts of thickener and 24 parts of deionized water.

4. A dark green water-based acrylic high-performance optical camouflage paint according to claim 1, 2 or 3, characterized in that: The two-component emulsion includes polyacrylate emulsion and ethylene vinyl acetate copolymer emulsion; the one-component emulsion includes silicone acrylic emulsion.

5. A dark green water-based acrylic high-performance optical camouflage paint according to claim 1, 2 or 3, characterized in that: The dispersant includes sodium polycarboxylate; the wetting agent is alkylphenol polyoxyethylene ether; and the defoaming agent is organic silicon polyether modified mineral oil.

6. A dark green water-based acrylic high-performance optical camouflage paint according to claim 1, 2 or 3, characterized in that: The dark green pigment is one or more of zinc-cobalt metal oxides, cobalt-chromium oxides or cobalt-aluminum oxides; the chrome green pigment is chromium trioxide; the orange pigment is one or more of zinc-iron oxides or titanium chrome yellow; the iron yellow pigment is hydrated iron oxide; the iron red pigment is iron oxide; and the iron black pigment is ferroferric oxide.

7. A dark green water-based acrylic high-performance optical camouflage paint according to claim 1, 2 or 3, characterized in that: The talc powder is hydrated magnesium silicate; the film-forming aid is one or more of alcohol ester lauryl and propylene glycol monobutyl ether; and the thickener is one or more of polyurethane-modified polyether associative thickeners or acrylic acid base thickeners.

8. A method for preparing a dark green water-based acrylic high-performance optical camouflage coating, using the dark green water-based acrylic high-performance optical camouflage coating according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1. Weigh each component according to mass ratio; S2. Mix a portion of the deionized water and defoaming agent with the entire amount of propylene glycol, dispersant, and wetting agent and stir to disperse uniformly to obtain a mixed solution 1; S3, under stirring, adding all the formula amounts of dark green pigment, chrome green, orange, iron yellow, iron red, iron black and talcum powder to the mixed solution one, stirring and dispersing them evenly to obtain a premixed slurry, and grinding the premixed slurry at room temperature to obtain a mixed solution two; S4. Mixing the second mixed solution with the entire amount of the two-component emulsion and the one-component emulsion under stirring, and then adding the entire amount of the film-forming aid and the remaining amount of the defoaming agent to obtain a third mixed solution; S5. Under stirring, add the entire amount of thickener and the remaining amount of deionized water to the mixed solution 3, and disperse them evenly to obtain a dark green water-based acrylic high-performance optical camouflage coating.

9. The method for preparing a dark green water-based acrylic high-performance optical camouflage coating according to claim 8, characterized in that: The stirring speed in step S2 is 400-600 r / min, and the stirring time is 10-15 min; the stirring speed in step S3 is 600-800 r / min, and the stirring time is 20-30 min, and the grinding is grinding the premixed slurry to a fineness of less than 100 microns by a conical mill; the stirring speed in step S4 is 800-1000 r / min, and the stirring time is 30-40 min; the stirring speed in step S5 is 1000-1200 r / min, and the stirring time is 30-40 min.

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