Preparation method of super-weather-resistant aluminum powder pigment

Abstract

The preparation method comprises the following steps: adding 10-100 parts of a flaky aluminum pigment and 100-900 parts of an alcohol solvent into a reaction tank, adding a silane coupling agent X-SI-Y3, uniformly stirring and dispersing at 25-100 DEG C, reacting for 4-10 hours, carrying out suction filtration and cleaning, and preparing a filter cake A; according to the process, the acid and alkali resistance of the silicon-coated aluminum pigment is improved, the loss of metallic feeling and covering power of an aluminum sheet is reduced, the process is simpler, and a coating layer is thinner and more compact.

Description

Technical Field

[0001] The invention relates to the technical field of aluminum powder pigments, and in particular to a method for preparing a super-weather-resistant aluminum powder pigment. Background Art

[0002] At present, with the improvement of people's living standards, people are pursuing higher and higher pigments with decorative metal effects in life, and the demand for highly weather-resistant aluminum pigments is increasing. Aluminum powder pigment is one of the most common metallic pigments. It is deeply favored by designers for its unique glitter, covering and decorative effects. Its usage has increased rapidly since the last century. In recent decades, it has developed towards high added value and water compatibility. The main application areas include industrial coatings, automotive coatings, decoration and decoration, printing inks, plastic processing, etc.

[0003] The aluminum powder pigment prepared from the existing silicon-coated aluminum pigment has a large loss of metallic feel and hiding power, a brittle coating layer, and poor acid and alkali resistance. Based on this, the present invention further improves and processes it. Summary of the invention

[0004] In view of the defects of the prior art, the purpose of the present invention is to provide a method for preparing a super-weather-resistant aluminum powder pigment to solve the problems raised in the above-mentioned background technology.

[0005] The present invention solves the technical problem by adopting the following technical solution:

[0006] The present invention provides a method for preparing a super-weather-resistant aluminum powder pigment, comprising the following steps:

[0007] Step 1: Add 10-100 parts of flaky aluminum pigment and 100-900 parts of alcohol solvent into a reaction tank, add silane coupling agent X-SI-Y3, stir and disperse evenly at 25-100° C. and react for 4-10 hours, filter and wash, and prepare filter cake A;

[0008] Step 2: Disperse the filter cake A from the first step and 100-900 parts of alcohol solvent evenly, add 1-1000 parts of fluorinated silicic acid solution, adjust the pH to 4-6, stir evenly, and react for 1-2 hours;

[0009] Step 3: Add aluminum carbonate solution to the reaction tank in step 2, adjust the pH to 7-7.5, and react for 1-2 hours under stirring;

[0010] Step 4: Repeat steps 2 and 3 several times;

[0011] Step 5: Filter the aluminum pigment in the reaction tank in step 4, wash it once with alcohol, then filter it, and vacuum dry it to prepare super weather-resistant aluminum powder pigment.

[0012] Preferably, a modified filler is also added to the first step reaction tank, and the modified filler is 10-15% of the total amount of the flaky aluminum pigment.

[0013] Preferably, the modified filler is a sodium alginate modified liquid, a boron nitride conditioning agent and nano-mica powder in a weight ratio of 5:3:2;

[0014] The preparation method of sodium alginate modified liquid is as follows:

[0015] S01: irradiating yttrium oxide in a proton irradiation box for 10-15 minutes at an irradiation power of 350-400W, and obtaining irradiated yttrium oxide after the irradiation is completed;

[0016] S02: adding 3-5 parts of irradiated yttrium oxide, 1-3 parts of nano-silica sol, and 2-4 parts of hydroxyapatite to 4-7 parts of chitosan solution, mixing and ball milling, washing with water, and drying to obtain a yttrium regulator;

[0017] S03: The yttrium regulator, the sodium alginate solution and the silane coupling agent are mixed in a weight ratio of 2:5:1 to obtain a sodium alginate modified solution.

[0018] Preferably, the mass fraction of the chitosan solution is 2-5%; the mass fraction of the sodium alginate solution is 4-6%; the ball milling speed of the blended ball milling treatment is 1000-1500 r / min, and the ball milling is performed for 2 hours.

[0019] Preferably, the silane coupling agent is silane coupling agent KH560.

[0020] Preferably, the preparation method of the boron nitride performance regulator is:

[0021] S101: first immerse the boron nitride in a sufficient amount of lanthanum nitrate solution and mix well to obtain a boron nitride liquid; then mix the boron nitride liquid and the sodium citrate solution in a weight ratio of 2:5 to obtain a boron nitride modified liquid;

[0022] S102: The boron nitride modifying liquid and the performance-enhancing agent are mixed and ball-milled in a weight ratio of 4:3, washed with water, and dried to obtain the boron nitride performance-enhancing agent.

[0023] Preferably, the mass fraction of the sodium citrate solution is 5-8%; the mass fraction of the lanthanum nitrate solution is 2-5%.

[0024] Preferably, the mixing ball milling process is performed at a ball milling speed of 1000-1500 r / min, and the ball milling is performed for 2 hours.

[0025] Preferably, the preparation method of the synergist is:

[0026] Add 2-5 parts of urea and 1-3 parts of silane coupling agent to 4-7 parts of sodium silicate solution, stir and mix, then add 2-5 parts of calcite powder and mix well, and ball mill at a speed of 550-750r / min for 2h. After the ball milling is completed, wash with water and dry to obtain a performance conditioning agent.

[0027] Preferably, the mass fraction of the sodium silicate solution is 2-5%; and the silane coupling agent is silane coupling agent KH550.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The invention improves the acid and alkali resistance of silicon-coated aluminum pigments, reduces the loss of metallic feel and covering power of aluminum sheets, is simpler, and has a thinner and denser coating layer. Principle 1: The aluminum sheet is surface treated by a special silane coupling agent X-SI-Y3 to form an ultra-thin protective layer. Principle 2: A layer of silicon dioxide and aluminum fluoride is coated on the surface of the aluminum sheet by fluorosilicic acid and aluminum salt (other metal salts are also acceptable). Principle 3: Fluorosilicic acid is used to react with aluminum oxide on the surface of aluminum pigments to generate aluminum fluoride and silicon dioxide. Principle 4: Dehydration and solvent are performed under high temperature conditions to form a dense coating layer to prepare dry powder. The invention further optimizes the performance stability of the product by adding modified fillers. The modified fillers are coordinated with sodium alginate modifying liquid, boron nitride synergist and nano mica powder to enhance the performance stability of the optimized product. DETAILED DESCRIPTION

[0030] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. 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 creative work are within the scope of protection of the present invention.

[0031] A method for preparing a super-weather-resistant aluminum powder pigment in this embodiment comprises the following steps:

[0032] Step 1: Add 10-100 parts of flaky aluminum pigment and 100-900 parts of alcohol solvent into a reaction tank, add silane coupling agent X-SI-Y3, stir and disperse evenly at 25-100° C. and react for 4-10 hours, filter and wash, and prepare filter cake A;

[0033] Step 2: Disperse the filter cake A from the first step and 100-900 parts of alcohol solvent evenly, add 1-1000 parts of fluorinated silicic acid solution, adjust the pH to 4-6, stir evenly, and react for 1-2 hours;

[0034] Step 3: Add aluminum carbonate solution to the reaction tank in step 2, adjust the pH to 7-7.5, and react for 1-2 hours under stirring;

[0035] Step 4: Repeat steps 2 and 3 several times;

[0036] Step 5: Filter the aluminum pigment in the reaction tank in step 4, wash it once with alcohol, then filter it, and vacuum dry it to prepare super weather-resistant aluminum powder pigment.

[0037] In the first step of this embodiment, a modified filler is also added into the reaction tank, and the modified filler accounts for 10-15% of the total amount of the flaky aluminum pigment.

[0038] The modified filler in this embodiment is a sodium alginate modified liquid, a boron nitride conditioning agent and nano-mica powder in a weight ratio of 5:3:2;

[0039] The preparation method of sodium alginate modified liquid is as follows:

[0040] S01: irradiating yttrium oxide in a proton irradiation box for 10-15 minutes at an irradiation power of 350-400W, and obtaining irradiated yttrium oxide after the irradiation is completed;

[0041] S02: adding 3-5 parts of irradiated yttrium oxide, 1-3 parts of nano-silica sol, and 2-4 parts of hydroxyapatite to 4-7 parts of chitosan solution, mixing and ball milling, washing with water, and drying to obtain a yttrium regulator;

[0042] S03: The yttrium regulator, the sodium alginate solution and the silane coupling agent are mixed in a weight ratio of 2:5:1 to obtain a sodium alginate modified solution.

[0043] The mass fraction of the chitosan solution in this embodiment is 2-5%; the mass fraction of the sodium alginate solution is 4-6%; the ball milling speed of the blended ball milling treatment is 1000-1500r / min, and the ball milling is performed for 2h.

[0044] The silane coupling agent of this embodiment is silane coupling agent KH560.

[0045] The preparation method of the boron nitride synergist of this embodiment is as follows:

[0046] S101: first immerse the boron nitride in a sufficient amount of lanthanum nitrate solution and mix well to obtain a boron nitride liquid; then mix the boron nitride liquid and the sodium citrate solution in a weight ratio of 2:5 to obtain a boron nitride modified liquid;

[0047] S102: The boron nitride modifying liquid and the performance-enhancing agent are mixed and ball-milled in a weight ratio of 4:3, washed with water, and dried to obtain the boron nitride performance-enhancing agent.

[0048] The mass fraction of the sodium citrate solution in this embodiment is 5-8%; the mass fraction of the lanthanum nitrate solution is 2-5%.

[0049] The ball milling speed of the mixing ball milling treatment in this embodiment is 1000-1500r / min, and the ball milling is 2h.

[0050] The preparation method of the performance modifier of this embodiment is:

[0051] Add 2-5 parts of urea and 1-3 parts of silane coupling agent to 4-7 parts of sodium silicate solution, stir and mix, then add 2-5 parts of calcite powder and mix well, and ball mill at a speed of 550-750r / min for 2h. After the ball milling is completed, wash with water and dry to obtain a performance conditioning agent.

[0052] The mass fraction of the sodium silicate solution in this embodiment is 2-5%; the silane coupling agent is silane coupling agent KH550.

[0053] Example 1.

[0054] A method for preparing a super-weather-resistant aluminum powder pigment in this embodiment comprises the following steps:

[0055] Step 1: Add 10 parts of flaky aluminum pigment and 100 parts of alcohol solvent into a reaction tank, add silane coupling agent X-SI-Y3, stir and disperse evenly at 25°C and react for 4 hours, filter and wash, and prepare filter cake A;

[0056] Step 2: Disperse the filter cake A from the first step and 100 parts of alcohol solvent evenly, add 1 part of fluorinated silicic acid solution, adjust the pH to 4, stir evenly, and react for 1 hour;

[0057] Step 3: Add aluminum carbonate solution to the reaction tank in step 2, adjust the pH to 7, and react for 1 hour under stirring;

[0058] Step 4: Repeat steps 2 and 3 several times;

[0059] Step 5: Filter the aluminum pigment in the reaction tank in step 4, wash it once with alcohol, then filter it, and vacuum dry it to prepare super weather-resistant aluminum powder pigment.

[0060] In the first step of this embodiment, a modified filler is also added into the reaction tank, and the modified filler accounts for 10% of the total amount of the flaky aluminum pigment.

[0061] The modified filler in this embodiment is a sodium alginate modified liquid, a boron nitride conditioning agent and nano-mica powder in a weight ratio of 5:3:2;

[0062] The preparation method of sodium alginate modified liquid is as follows:

[0063] S01: irradiating yttrium oxide in a proton irradiation box for 10 minutes at an irradiation power of 350W, and obtaining irradiated yttrium oxide after the irradiation is completed;

[0064] S02: adding 3 parts of irradiated yttrium oxide, 1 part of nano-silica sol, and 2 parts of hydroxyapatite to 4 parts of chitosan solution, mixing and ball milling, washing with water, and drying to obtain a yttrium regulator;

[0065] S03: The yttrium regulator, the sodium alginate solution and the silane coupling agent are mixed in a weight ratio of 2:5:1 to obtain a sodium alginate modified solution.

[0066] The mass fraction of the chitosan solution in this embodiment is 2%; the mass fraction of the sodium alginate solution is 4%; the ball milling speed of the blended ball milling treatment is 1000 r / min, and the ball milling is performed for 2 hours.

[0067] The silane coupling agent of this embodiment is silane coupling agent KH560.

[0068] The preparation method of the boron nitride synergist of this embodiment is as follows:

[0069] S101: first immerse the boron nitride in a sufficient amount of lanthanum nitrate solution and mix well to obtain a boron nitride liquid; then mix the boron nitride liquid and the sodium citrate solution in a weight ratio of 2:5 to obtain a boron nitride modified liquid;

[0070] S102: The boron nitride modifying liquid and the performance-enhancing agent are mixed and ball-milled in a weight ratio of 4:3, washed with water, and dried to obtain the boron nitride performance-enhancing agent.

[0071] The mass fraction of the sodium citrate solution in this embodiment is 5%; the mass fraction of the lanthanum nitrate solution is 2%.

[0072] The ball milling speed of the mixing ball milling treatment in this embodiment is 1000r / min, and the ball milling is 2h.

[0073] The preparation method of the performance modifier of this embodiment is:

[0074] Add 2 parts of urea and 1 part of silane coupling agent to 4 parts of sodium silicate solution, stir and mix, then add 2 parts of calcite powder and mix well, and ball mill at a speed of 550r / min for 2h. After the ball milling is completed, wash with water and dry to obtain a performance conditioning agent.

[0075] The mass fraction of the sodium silicate solution in this embodiment is 2%; the silane coupling agent is silane coupling agent KH550.

[0076] Example 2.

[0077] A method for preparing a super-weather-resistant aluminum powder pigment in this embodiment comprises the following steps:

[0078] Step 1: Add 100 parts of flaky aluminum pigment and 900 parts of alcohol solvent into a reaction tank, add silane coupling agent X-SI-Y3, stir and disperse evenly at 100° C. and react for 10 hours, filter and wash, and prepare filter cake A;

[0079] Step 2: Disperse the filter cake A from the first step and 900 parts of alcohol solvent evenly, add 1000 parts of fluorinated silicic acid solution, adjust the pH to 4-6, stir evenly, and react for 1-2 hours;

[0080] Step 3: Add aluminum carbonate solution to the reaction tank in step 2, adjust the pH to 7.5, and react for 2 hours under stirring;

[0081] Step 4: Repeat steps 2 and 3 several times;

[0082] Step 5: Filter the aluminum pigment in the reaction tank in step 4, wash it once with alcohol, then filter it, and vacuum dry it to prepare super weather-resistant aluminum powder pigment.

[0083] In the first step of this embodiment, a modified filler is also added into the reaction tank, and the modified filler accounts for 15% of the total amount of the flaky aluminum pigment.

[0084] The modified filler in this embodiment is a sodium alginate modified liquid, a boron nitride conditioning agent and nano-mica powder in a weight ratio of 5:3:2;

[0085] The preparation method of sodium alginate modified liquid is as follows:

[0086] S01: irradiating the yttrium oxide in a proton irradiation box for 15 minutes at an irradiation power of 400W, and obtaining irradiated yttrium oxide after the irradiation is completed;

[0087] S02: adding 5 parts of irradiated yttrium oxide, 3 parts of nano-silica sol, and 4 parts of hydroxyapatite to 7 parts of chitosan solution, mixing and ball milling, washing with water, and drying to obtain a yttrium regulator;

[0088] S03: The yttrium regulator, the sodium alginate solution and the silane coupling agent are mixed in a weight ratio of 2:5:1 to obtain a sodium alginate modified solution.

[0089] The mass fraction of the chitosan solution in this embodiment is 5%; the mass fraction of the sodium alginate solution is 6%; the ball milling speed of the blended ball milling treatment is 1500 r / min, and the ball milling is performed for 2 hours.

[0090] The silane coupling agent of this embodiment is silane coupling agent KH560.

[0091] The preparation method of the boron nitride synergist of this embodiment is as follows:

[0092] S101: first immerse the boron nitride in a sufficient amount of lanthanum nitrate solution and mix well to obtain a boron nitride liquid; then mix the boron nitride liquid and the sodium citrate solution in a weight ratio of 2:5 to obtain a boron nitride modified liquid;

[0093] S102: The boron nitride modifying liquid and the performance-enhancing agent are mixed and ball-milled in a weight ratio of 4:3, washed with water, and dried to obtain the boron nitride performance-enhancing agent.

[0094] The mass fraction of the sodium citrate solution in this embodiment is 8%; the mass fraction of the lanthanum nitrate solution is 5%.

[0095] The ball milling speed of the mixing ball milling treatment in this embodiment is 1500r / min, and the ball milling is 2h.

[0096] The preparation method of the performance modifier of this embodiment is:

[0097] Add 5 parts of urea and 3 parts of silane coupling agent to 7 parts of sodium silicate solution, stir and mix, then add 5 parts of calcite powder and mix well, and ball mill at a speed of 750r / min for 2h. After the ball milling is completed, wash with water and dry to obtain a performance conditioning agent.

[0098] The mass fraction of the sodium silicate solution in this embodiment is 5%; the silane coupling agent is silane coupling agent KH550.

[0099] Example 3.

[0100] A method for preparing a super-weather-resistant aluminum powder pigment in this embodiment comprises the following steps:

[0101] Step 1: Add 55 parts of flaky aluminum pigment and 450 parts of alcohol solvent into a reaction tank, add silane coupling agent X-SI-Y3, stir and disperse evenly at 55°C and react for 7 hours, filter and wash, and prepare filter cake A;

[0102] Step 2: Disperse the filter cake A from the first step and 300 parts of alcohol solvent evenly, add 500 parts of fluorinated silicic acid solution, adjust the pH to 4-6, stir evenly, and react for 1.5 hours;

[0103] Step 3: Add aluminum carbonate solution to the reaction tank in step 2, adjust the pH to 7.2, and react for 1.5 hours under stirring;

[0104] Step 4: Repeat steps 2 and 3 several times;

[0105] Step 5: Filter the aluminum pigment in the reaction tank in step 4, wash it once with alcohol, then filter it, and vacuum dry it to prepare super weather-resistant aluminum powder pigment.

[0106] In the first step of this embodiment, a modified filler is also added into the reaction tank, and the modified filler accounts for 12.5% ​​of the total amount of the flaky aluminum pigment.

[0107] The modified filler in this embodiment is a sodium alginate modified liquid, a boron nitride conditioning agent and nano-mica powder in a weight ratio of 5:3:2;

[0108] The preparation method of sodium alginate modified liquid is as follows:

[0109] S01: irradiating yttrium oxide in a proton irradiation box for 12.5 minutes at an irradiation power of 370W, and obtaining irradiated yttrium oxide after the irradiation is completed;

[0110] S02: adding 4 parts of irradiated yttrium oxide, 2 parts of nano-silica sol, and 3 parts of hydroxyapatite to 5.5 parts of chitosan solution, mixing and ball milling, washing with water, and drying to obtain a yttrium regulator;

[0111] S03: The yttrium regulator, the sodium alginate solution and the silane coupling agent are mixed in a weight ratio of 2:5:1 to obtain a sodium alginate modified solution.

[0112] The mass fraction of the chitosan solution in this embodiment is 3.5%; the mass fraction of the sodium alginate solution is 5%; the ball milling speed of the blended ball milling treatment is 1200 r / min, and the ball milling is performed for 2 hours.

[0113] The silane coupling agent of this embodiment is silane coupling agent KH560.

[0114] The preparation method of the boron nitride synergist of this embodiment is as follows:

[0115] S101: first immerse the boron nitride in a sufficient amount of lanthanum nitrate solution and mix well to obtain a boron nitride liquid; then mix the boron nitride liquid and the sodium citrate solution in a weight ratio of 2:5 to obtain a boron nitride modified liquid;

[0116] S102: The boron nitride modifying liquid and the performance-enhancing agent are mixed and ball-milled in a weight ratio of 4:3, washed with water, and dried to obtain the boron nitride performance-enhancing agent.

[0117] The mass fraction of the sodium citrate solution in this embodiment is 6.5%; the mass fraction of the lanthanum nitrate solution is 3.5%.

[0118] The mixing ball milling process in this embodiment has a ball milling speed of 1250 r / min and the ball milling is performed for 2 h.

[0119] The preparation method of the performance modifier of this embodiment is:

[0120] Add 3.5 parts of urea and 2 parts of silane coupling agent to 5.5 parts of sodium silicate solution, stir and mix, then add 3.5 parts of calcite powder and mix well, and ball mill at a speed of 600 r / min for 2 hours. After the ball milling is completed, wash with water and dry to obtain a performance conditioning agent.

[0121] The mass fraction of the sodium silicate solution in this embodiment is 3.5%; the silane coupling agent is silane coupling agent KH550.

[0122] Example 4.

[0123] A method for preparing a super-weather-resistant aluminum powder pigment in this embodiment comprises the following steps:

[0124] Step 1: Add 55 parts of flaky aluminum pigment and 450 parts of alcohol solvent into a reaction tank, add silane coupling agent X-SI-Y3, stir and disperse evenly at 45°C and react for 6 hours, filter and wash, and prepare filter cake A;

[0125] Step 2: Disperse the filter cake A from the first step and 200 parts of alcohol solvent evenly, add 200 parts of fluorinated silicic acid solution, adjust the pH to 4-6, stir evenly, and react for 2 hours;

[0126] Step 3: Add aluminum carbonate solution to the reaction tank in step 2, adjust the pH to 7, and react for 1 hour under stirring;

[0127] Step 4: Repeat steps 2 and 3 several times;

[0128] Step 5: Filter the aluminum pigment in the reaction tank in step 4, wash it once with alcohol, then filter it, and vacuum dry it to prepare super weather-resistant aluminum powder pigment.

[0129] In the first step of this embodiment, a modified filler is also added into the reaction tank, and the modified filler accounts for 12% of the total amount of the flaky aluminum pigment.

[0130] The modified filler in this embodiment is a sodium alginate modified liquid, a boron nitride conditioning agent and nano-mica powder in a weight ratio of 5:3:2;

[0131] The preparation method of sodium alginate modified liquid is as follows:

[0132] S01: irradiating yttrium oxide in a proton irradiation box for 12 minutes at an irradiation power of 360W, and obtaining irradiated yttrium oxide after the irradiation is completed;

[0133] S02: adding 4 parts of irradiated yttrium oxide, 2 parts of nano-silica sol, and 3 parts of hydroxyapatite to 5 parts of chitosan solution, mixing and ball milling, washing with water, and drying to obtain a yttrium regulator;

[0134] S03: The yttrium regulator, the sodium alginate solution and the silane coupling agent are mixed in a weight ratio of 2:5:1 to obtain a sodium alginate modified solution.

[0135] The mass fraction of the chitosan solution in this embodiment is 3%; the mass fraction of the sodium alginate solution is 5%; the ball milling speed of the blended ball milling treatment is 1250 r / min, and the ball milling is performed for 2 hours.

[0136] The silane coupling agent of this embodiment is silane coupling agent KH560.

[0137] The preparation method of the boron nitride synergist of this embodiment is as follows:

[0138] S101: first immerse the boron nitride in a sufficient amount of lanthanum nitrate solution and mix well to obtain a boron nitride liquid; then mix the boron nitride liquid and the sodium citrate solution in a weight ratio of 2:5 to obtain a boron nitride modified liquid;

[0139] S102: The boron nitride modifying liquid and the performance-enhancing agent are mixed and ball-milled in a weight ratio of 4:3, washed with water, and dried to obtain the boron nitride performance-enhancing agent.

[0140] The mass fraction of the sodium citrate solution in this embodiment is 7%; the mass fraction of the lanthanum nitrate solution is 3%.

[0141] The mixing ball milling process in this embodiment has a ball milling speed of 1250 r / min and the ball milling is performed for 2 h.

[0142] The preparation method of the performance modifier of this embodiment is:

[0143] Add 4 parts of urea and 2 parts of silane coupling agent to 6 parts of sodium silicate solution, stir and mix, then add 3 parts of calcite powder and mix well, and ball mill at a speed of 700r / min for 2h. After the ball milling is completed, wash with water and dry to obtain a performance conditioning agent.

[0144] The mass fraction of the sodium silicate solution in this embodiment is 3%; the silane coupling agent is silane coupling agent KH550.

[0145] Comparative Example 1.

[0146] The difference from Example 3 is that no modified filler is added.

[0147] Comparative Example 2.

[0148] The difference from Example 3 is that no sodium alginate modifying liquid is added to the modified filler.

[0149] Comparative Example 3.

[0150] The difference from Example 3 is that no yttrium regulator is added to the sodium alginate modified solution.

[0151] Comparative Example 4.

[0152] The difference from Example 3 is that no irradiated yttrium oxide or nano-silica sol is added to the yttrium regulator.

[0153] Comparative Example 5.

[0154] The difference from Example 3 is that no boron nitride performance regulator is added.

[0155] Comparative Example 6.

[0156] The difference from Example 3 is that no conditioning agent is added to the boron nitride conditioning agent.

[0157] The products of Examples 1-4 and Comparative Examples 1-6 of the present invention were placed in 2% hydrochloric acid acid corrosion conditions for 24 hours and in 5% sodium hydroxide alkaline mist conditions for 12 hours to test the acid and alkali corrosion stability of the products. The performance test results are as follows.

[0158]

[0159] It can be seen from Examples 1-4 and Comparative Examples 1-6 that the products of Examples 1-4 of the present invention have excellent acid and alkali corrosion stability, and the modified filler obtained by co-adjusting the sodium alginate modifying liquid with the boron nitride synergist has a significant effect on the performance of the product. In addition, when no yttrium regulator is added to the sodium alginate modifying liquid, no irradiated yttrium oxide, nano-silica sol is added to the yttrium regulator, and no synergist is added to the boron nitride synergist, the performance of the product tends to deteriorate. Only when the product raw material obtained by the method of the present invention is used, the performance effect of the product is the most significant.

[0160] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive in all respects, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention.

[0161] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A method for preparing a super weather-resistant aluminum powder pigment, characterized in that: The following steps are involved: Step 1: Add 10-100 parts of flaky aluminum pigment and 100-900 parts of alcohol solvent into a reaction tank, add silane coupling agent X-SI-Y3, stir and disperse evenly at 25-100° C. and react for 4-10 hours, filter and wash, and prepare filter cake A; Step 2: Disperse the filter cake A from the first step and 100-900 parts of alcohol solvent evenly, add 1-1000 parts of fluorinated silicic acid solution, adjust the pH to 4-6, stir evenly, and react for 1-2 hours; Step 3: Add aluminum carbonate solution to the reaction tank in step 2, adjust the pH to 7-7.5, and react for 1-2 hours under stirring; Step 4: Repeat steps 2 and 3 several times; Step 5: Filter the aluminum pigment in the reaction tank in step 4, wash it once with alcohol, then filter it, and vacuum dry it to prepare super weather-resistant aluminum powder pigment.

2. The method for preparing a super-weather-resistant aluminum powder pigment according to claim 1, characterized in that: A modified filler is also added into the first step reaction tank, and the modified filler accounts for 10-15% of the total amount of the flaky aluminum pigment.

3. The method for preparing a super-weather-resistant aluminum powder pigment according to claim 2, characterized in that: The modified filler is prepared by mixing sodium alginate modified liquid, boron nitride conditioning agent and nano mica powder in a weight ratio of 5:3:2; The preparation method of sodium alginate modified liquid is as follows: S01: irradiating yttrium oxide in a proton irradiation box for 10-15 minutes at an irradiation power of 350-400W, and obtaining irradiated yttrium oxide after the irradiation is completed; S02: adding 3-5 parts of irradiated yttrium oxide, 1-3 parts of nano-silica sol, and 2-4 parts of hydroxyapatite to 4-7 parts of chitosan solution, mixing and ball milling, washing with water, and drying to obtain a yttrium regulator; S03: The yttrium regulator, the sodium alginate solution and the silane coupling agent are mixed in a weight ratio of 2:5:1 to obtain a sodium alginate modified solution.

4. The method for preparing a super-weather-resistant aluminum powder pigment according to claim 3, characterized in that: The mass fraction of the chitosan solution is 2-5%; the mass fraction of the sodium alginate solution is 4-6%; the ball milling speed of the blended ball milling treatment is 1000-1500r / min, and the ball milling is performed for 2h.

5. The method for preparing a super-weather-resistant aluminum powder pigment according to claim 3, characterized in that: The silane coupling agent is silane coupling agent KH560.

6. The method for preparing a super-weather-resistant aluminum powder pigment according to claim 3, characterized in that: The preparation method of the boron nitride synergist is as follows: S101: first immerse the boron nitride in a sufficient amount of lanthanum nitrate solution and mix well to obtain a boron nitride liquid; then mix the boron nitride liquid and the sodium citrate solution in a weight ratio of 2:5 to obtain a boron nitride modified liquid; S102: The boron nitride modifying liquid and the performance-enhancing agent are mixed and ball-milled in a weight ratio of 4:3, washed with water, and dried to obtain the boron nitride performance-enhancing agent.

7. The method for preparing a super-weather-resistant aluminum powder pigment according to claim 6, characterized in that: The mass fraction of the sodium citrate solution is 5-8%; the mass fraction of the lanthanum nitrate solution is 2-5%.

8. The method for preparing a super-weather-resistant aluminum powder pigment according to claim 6, characterized in that: The mixing and ball milling treatment is performed at a ball milling speed of 1000-1500 r / min and the ball milling is performed for 2 hours.

9. The method for preparing a super-weather-resistant aluminum powder pigment according to claim 6, characterized in that: The preparation method of the synergist is as follows: Add 2-5 parts of urea and 1-3 parts of silane coupling agent to 4-7 parts of sodium silicate solution, stir and mix, then add 2-5 parts of calcite powder and mix well, and ball mill at a speed of 550-750r / min for 2h. After the ball milling is completed, wash with water and dry to obtain a performance conditioning agent.

10. The method for preparing a super-weather-resistant aluminum powder pigment according to claim 9, characterized in that: The mass fraction of the sodium silicate solution is 2-5%; and the silane coupling agent is silane coupling agent KH550.

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