One-component anticorrosion and antirust water-based reactive primer and preparation method thereof

Abstract

The present invention relates to the technical field of water-based coatings, and proposes a one-component anti-corrosion and anti-rust water-based reactive primer and a preparation method thereof. The one-component anti-corrosion and anti-rust water-based reactive primer comprises the following component raw materials in parts by weight: 40-50 parts of water-based modified acrylic resin, 10-12 parts of siloxane resin, 1-3 parts of color paste, 10-30 parts of filler, 6-15 parts of auxiliary agent, 4-6 parts of hydrochloric acid, and 20-30 parts of water; the water-based modified acrylic resin comprises water-based organosilicon-modified acrylic resin and water-based epoxy-modified acrylic resin, and the mass ratio of water-based organosilicon-modified acrylic resin to water-based epoxy-modified acrylic resin is 1-4:4-1. Through the above technical scheme, the anti-corrosion and anti-rust paint only needs to be stirred and mixed evenly, the construction is extremely convenient, and it can directly react with rust to form an anti-corrosion layer, which solves the problems in the related art that the one-component water-based paint needs to be polished to remove the rust products before coating, the construction process is complicated, and the anti-corrosion and anti-rust performance is low.

Description

Technical Field

[0001] The invention relates to the technical field of water-based coatings, and in particular to a single-component anticorrosion and antirust water-based reactive primer and a preparation method thereof. Background Art

[0002] In modern industry and daily life, the widespread use of metal materials inevitably faces the challenge of corrosion. Rust not only destroys the appearance of metal, but also seriously weakens its structural strength and service life, bringing huge economic losses and safety hazards to various fields. Traditional anti-corrosion and anti-rust methods mainly rely on ordinary primers, but these primers often have many limitations. On the one hand, ordinary primers are mostly two-component or multi-component systems, the construction process is relatively complicated, and long-term repeated grinding treatment is required. Before coating, it is necessary to polish and remove rust products to expose the fresh metal surface, which has high requirements for the construction environment and technology, and increases labor costs and time costs. On the other hand, the salt spray resistance of ordinary primers is limited, and it is difficult to effectively protect metals for a long time under harsh environmental conditions. The single-component water-based paint currently sold on the market has low hardness, easy wear, poor impact resistance, and short drying time, which increases the risk of construction pollution and may cause the coating performance to decline. Therefore, it is an urgent problem to develop a single-component anti-corrosion and anti-rust water-based reactive primer with simple construction and high salt spray resistance. Summary of the invention

[0003] The present invention provides a one-component anti-corrosion and anti-rust water-based reactive primer and a preparation method thereof. The water-based reactive primer uses water as a diluent, is non-toxic, odorless, pollution-free, has low volatile organic compound (VOC) emissions, is safe and environmentally friendly, and as a one-component coating, only needs to be stirred and mixed evenly without a complicated grinding process, so the construction is extremely convenient, saving construction time and labor costs. The primer has high hardness and moderate drying speed, and improves the construction coating effect. The primer can react with rust to form an anti-corrosion layer, effectively preventing the further spread of rust, and providing reliable protection for metal materials, solving the problems of complex process, low anti-corrosion and anti-rust performance, low hardness, and too short drying time of single-component water-based paint in related technologies.

[0004] The technical scheme of the present invention is as follows: The present invention provides a one-component anticorrosion and antirust water-based reactive primer, comprising the following component raw materials in parts by weight: 40-50 parts of water-based modified acrylic resin, 10-12 parts of silicone resin, 1-3 parts of color paste, 10-30 parts of filler, 6-15 parts of additives, 4-6 parts of hydrochloric acid, and 20-30 parts of water; The water-based modified acrylic resin includes a water-based silicone-modified acrylic resin and a water-based epoxy-modified acrylic resin, and the mass ratio of the water-based silicone-modified acrylic resin to the water-based epoxy-modified acrylic resin is 1-4:4-1.

[0005] As a further technical solution, the mass ratio of the water-based silicone-modified acrylic resin to the water-based epoxy-modified acrylic resin is 1:1-3.

[0006] As a further technical solution, the raw material also includes water-based inorganic silicone resin, and the mass ratio of the water-based modified acrylic resin to the water-based inorganic silicone resin is 20:4-5.

[0007] As a further technical solution, the auxiliary agent is composed of a dispersant, a leveling agent, and an anti-rust and anti-corrosion agent, and the mass ratio of the dispersant, the leveling agent, and the anti-rust and anti-corrosion agent is 2:1:3.

[0008] As a further technical solution, the anticorrosion and rust inhibitor is an aminophosphate compound.

[0009] In the present invention, aminophosphate compounds are added as anticorrosion and rust preventive agents, which chemically adsorb on the metal surface to form a dense protective film, thereby exerting its corrosion inhibition effect and further improving the anticorrosion and rust prevention performance of the water-based paint.

[0010] As a further technical solution, the amino phosphate compound includes one or more of 2-aminoethyl-2,3-dihydroxypropyl-hydroxyphosphate, ethanolamine phosphate, and (2-aminoethyl) diethyl phosphate.

[0011] As a further technical solution, the aminophosphate compound is preferably ethanolamine phosphate.

[0012] As a further technical solution, the color paste includes one or more of phthalocyanine blue, lemon yellow, and permanent red.

[0013] As a further technical solution, the filler includes one or more of calcium carbonate, talcum powder, and mica powder.

[0014] As a further technical solution, at least one of the following technical features is also included: The dispersant includes one or more of BYK-180, BYK-181, and TEGO-735; The leveling agent includes one or two of polydimethylsiloxane and allyl hydroxyethyl ether.

[0015] The present invention also provides a method for preparing a one-component anticorrosion and antirust water-based reactive primer, comprising the following steps: S1. Weigh water-based modified acrylic resin, silicone resin, filler, additive, hydrochloric acid and water, and disperse them evenly to obtain a mixture; S2. Add the color paste into the mixture and mix well to obtain a single-component anti-corrosion and anti-rust water-based reactive primer.

[0016] The working principle and beneficial effects of the present invention are: 1. The present invention is a single-component water-based reactive primer with a simple process and no need for repeated grinding. The inorganic silicone resin is added to increase the hardness of the paint film, improve its wear resistance and scratch resistance, prolong the drying time, and ensure the convenience and stability of construction.

[0017] 2. In the present invention, water-based silicone-modified acrylic resin and water-based epoxy-modified acrylic resin are added as raw materials, and the two resins are mixed for use, giving full play to the dual anti-corrosion and anti-rust mechanism and synergistic effect, providing more comprehensive and stronger protective performance for metals, and improving the anti-corrosion and anti-rust performance of water-based paints. DETAILED DESCRIPTION

[0018] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0019] In the following examples and comparative examples: Water-based silicone modified acrylic resin: Model WH-103C, solid content 45%, viscosity 3000~4500S; Waterborne epoxy modified acrylic resin: Model TC-101B, solid content 65%, viscosity 5000~7000S; Siloxane resin: model number is SJ-106, manufacturer is Congyang County Sanjin Pigment Co., Ltd.; Water-based inorganic silicone resin: model SJ-32F, hardness 9H, manufacturer is Congyang County Sanjin Pigment Co., Ltd.; Polydimethylsiloxane: Model is PMX200-100, manufacturer is Shanghai Kaiyin Chemical Co., Ltd.

[0020] Example 1 S1, weighing 40 parts of water-based modified acrylic resin, 10 parts of silicone resin, 10 parts of calcium carbonate, 2 parts of BYK-180, 1 part of polydimethylsiloxane, 3 parts of phosphorus titanium powder, 4 parts of hydrochloric acid, and 20 parts of water, and dispersing them evenly to obtain a mixture, wherein the 40 parts of water-based modified acrylic resin include 32 parts of water-based silicone modified acrylic resin and 8 parts of water-based epoxy modified acrylic resin; S2. Add 1 part of phthalocyanine blue slurry into the mixture and mix well to obtain a single-component anticorrosion and antirust water-based reactive primer.

[0021] Example 2 S1, weighing 45 parts of water-based modified acrylic resin, 11 parts of silicone resin, 20 parts of talc, 4 parts of BYK-181, 2 parts of polydimethylsiloxane, 6 parts of phosphorus titanium powder, 5 parts of hydrochloric acid, and 25 parts of water, and dispersing them evenly to obtain a mixture, wherein the 45 parts of water-based modified acrylic resin include 36 parts of water-based silicone modified acrylic resin and 9 parts of water-based epoxy modified acrylic resin; S2. Add 2 parts of lemon yellow paste into the mixture and mix well to obtain a single-component anticorrosion and antirust water-based reactive primer.

[0022] Example 3 S1, weighing 50 parts of water-based modified acrylic resin, 12 parts of silicone resin, 30 parts of mica powder, 5 parts of TEGO-735, 2.5 parts of allyl hydroxyethyl ether, 7.5 parts of phosphorus titanium powder, 6 parts of hydrochloric acid, and 30 parts of water, and dispersing them evenly to obtain a mixture, wherein the 50 parts of water-based modified acrylic resin include 40 parts of water-based organosilicon-modified acrylic resin and 10 parts of water-based epoxy-modified acrylic resin; S2. Add 3 parts of permanent red paste into the mixture and mix well to obtain a single-component anti-corrosion and anti-rust water-based reactive primer.

[0023] Example 4 Compared with Example 1, Example 4 is different in that 32 parts of waterborne organosilicon-modified acrylic resin and 8 parts of waterborne epoxy-modified acrylic resin are replaced with 20 parts of waterborne organosilicon-modified acrylic resin and 20 parts of waterborne epoxy-modified acrylic resin.

[0024] Example 5 Compared with Example 1, Example 5 is different in that 32 parts of waterborne organosilicon-modified acrylic resin and 8 parts of waterborne epoxy-modified acrylic resin are replaced with 10 parts of waterborne organosilicon-modified acrylic resin and 30 parts of waterborne epoxy-modified acrylic resin.

[0025] Example 6 Compared with Example 1, Example 6 is different in that 32 parts of waterborne organosilicon-modified acrylic resin and 8 parts of waterborne epoxy-modified acrylic resin are replaced with 8 parts of waterborne organosilicon-modified acrylic resin and 32 parts of waterborne epoxy-modified acrylic resin.

[0026] Example 7 Compared with Example 5, the difference of Example 7 is that 3 parts of phosphorus titanium powder are replaced by 3 parts of an equal amount of (2-aminoethyl) diethyl phosphate.

[0027] Example 8 Compared with Example 5, the difference of Example 8 is that 3 parts of phosphorus titanium powder are replaced by an equal amount of ethanolamine phosphate.

[0028] Example 9 Compared with Example 5, the difference of Example 9 is that 3 parts of phosphorus titanium powder are replaced by an equal amount of 2-aminoethyl-2,3-dihydroxypropyl-hydroxyphosphate.

[0029] Example 10 S1, weighing 40 parts of water-based modified acrylic resin, 10 parts of silicone resin, 10 parts of calcium carbonate, 2 parts of BYK-180, 1 part of polydimethylsiloxane, 3 parts of ethanolamine phosphate, 4 parts of hydrochloric acid, 20 parts of water, and 6 parts of water-based inorganic silicone resin, and dispersing them uniformly to obtain a mixture, wherein the 40 parts of water-based modified acrylic resin include 10 parts of water-based silicone-modified acrylic resin and 30 parts of water-based epoxy-modified acrylic resin; S2. Add 1 part of phthalocyanine blue slurry into the mixture and mix well to obtain a single-component anticorrosion and antirust water-based reactive primer.

[0030] Embodiment 11 Compared with Example 10, Example 11 is different in that 6 parts of the water-based inorganic silicone resin are replaced with 8 parts of the water-based inorganic silicone resin.

[0031] Example 12 Compared with Example 10, Example 12 is different in that 6 parts of the water-based inorganic silicone resin are replaced with 10 parts of the water-based inorganic silicone resin.

[0032] Embodiment 13 Compared with Example 10, Example 13 is different in that 6 parts of the water-based inorganic silicone resin are replaced with 12 parts of the water-based inorganic silicone resin.

[0033] Comparative Example 1 Compared with Example 1, the difference of Comparative Example 1 is that the 40 parts of the added water-based modified acrylic resin only include water-based silicone-modified acrylic resin.

[0034] Comparative Example 2 Compared with Example 1, the difference of Comparative Example 2 is that the 40 parts of the added water-based modified acrylic resin only include water-based epoxy modified acrylic resin.

[0035] The one-component anticorrosion and antirust water-based reactive primers prepared in Examples 1 to 13 and Comparative Examples 1 to 2 were tested according to the following method: 1. Salt spray corrosion resistance: According to the test method specified in GB / T 31588.1-2015 "Determination of resistance of paints and varnishes to cyclic corrosion environments Part 1: Wet (salt spray) / dry / humidity", the salt spray corrosion resistance of the sample is tested. The test piece is a steel plate of 100×70×0.3mm, and the maximum time when the coating of the test piece has no bubbles, obvious deterioration, and softening is recorded.

[0036] 2. Acid resistance: According to method A specified in GB / T 30648.1-2014 "Determination of liquid resistance of paints and varnishes Part 1: Immersion in liquids other than water", the acid resistance of the sample was tested. The liquid other than water was 5% hydrochloric acid, the test piece was a steel plate of 150×100×1mm, and the maximum time when the coating of the test piece was free of bubbles, obvious deterioration, and softening was recorded. The dry film thickness was 30μm.

[0037] Hardness: Test the hardness of the sample according to the test method specified in GB / T 6739-2006 "Determination of paint film hardness by pencil method for paints and varnishes". Surface drying time: Test the surface drying time of the sample according to the test method specified in GB / T 1728-2020 "Determination of drying time of paint and putty films". Test conditions: dry film thickness 30μm, temperature 25℃, humidity 50%. The test results are shown in Tables 1~2 below: Table 1 Performance test results of the one-component anticorrosion and antirust water-based reactive primers prepared in Examples 1 to 9 and Comparative Examples 1 to 2

[0038] Compared with Comparative Examples 1 and 2, Example 1 simultaneously adds waterborne organosilicon-modified acrylic resin and waterborne epoxy-modified acrylic resin. As a result, the salt spray corrosion resistance and acid resistance of Example 1 are better than those of Comparative Examples 1 and 2, indicating that the waterborne organosilicon-modified acrylic resin and the waterborne epoxy-modified acrylic resin play a synergistic role and can improve the anticorrosion and antirust performance of the one-component anticorrosion and antirust waterborne reactive primer. In Examples 1 and Examples 4 to 6, waterborne organosilicon-modified acrylic resin and waterborne epoxy-modified acrylic resin in different mass ratios are added. As a result, the salt spray corrosion resistance and acid resistance of Examples 4 and 5 are better than those of Examples 1 and 6, indicating that when the mass ratio of waterborne organosilicon-modified acrylic resin and waterborne epoxy-modified acrylic resin is 1:1 to 3, the anticorrosion and antirust performance of the one-component anticorrosion and antirust waterborne reactive primer is better.

[0039] Compared with Example 5, Examples 7 to 9 replaced the phosphorus titanium powder with an equal amount of aminophosphate compounds. As a result, the salt spray corrosion resistance and acid resistance of Examples 7 to 9 were better than those of Example 5, indicating that the addition of aminophosphate compounds can improve the anti-corrosion and anti-rust properties of the one-component anti-corrosion and anti-rust water-based reactive primer. Among Examples 7 to 9, the salt spray corrosion resistance and acid resistance of Example 8 were better than those of Examples 7 and 9, indicating that when the added aminophosphate compound is ethanolamine phosphate, the obtained one-component anti-corrosion and anti-rust water-based reactive primer has better anti-corrosion and anti-rust properties.

[0040] Table 2 Performance test results of the one-component anticorrosion and antirust water-based reactive primers prepared in Examples 8 and 10 to 13

[0041] Compared with Example 8, Examples 10 to 13 added water-based inorganic silicone resin, and the hardness and surface drying time of Examples 10 to 13 were better than those of Example 8, indicating that the addition of water-based inorganic silicone resin can improve the hardness and surface drying time of the one-component anticorrosion and antirust water-based reactive primer. In Examples 10 to 13, different masses of water-based inorganic silicone resin were added, and the surface drying time of Examples 11 and 12 was better than that of Examples 10 and 13, indicating that when the mass ratio of water-based modified acrylic resin to water-based inorganic silicone resin is 20:4 to 5, the surface drying time of the obtained one-component anticorrosion and antirust water-based reactive primer is better.

[0042] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A one-component anticorrosion and antirust water-based reactive primer, characterized in that: The invention comprises the following raw materials in parts by weight: 40-50 parts of water-based modified acrylic resin, 10-12 parts of silicone resin, 1-3 parts of color paste, 10-30 parts of filler, 6-15 parts of auxiliary agent, 4-6 parts of hydrochloric acid and 20-30 parts of water; the water-based modified acrylic resin comprises water-based organosilicon-modified acrylic resin and water-based epoxy-modified acrylic resin, and the mass ratio of the water-based organosilicon-modified acrylic resin to the water-based epoxy-modified acrylic resin is 1-4:4-1.

2. A one-component anticorrosion and antirust water-based reactive primer according to claim 1, characterized in that: The mass ratio of the waterborne silicone-modified acrylic resin to the waterborne epoxy-modified acrylic resin is 1:1-3.

3. The one-component anticorrosion and antirust water-based reactive primer according to claim 1, characterized in that: The raw materials also include water-based inorganic silicone resin, and the mass ratio of the water-based modified acrylic resin to the water-based inorganic silicone resin is 20:4-5.

4. The one-component anticorrosion and antirust water-based reactive primer according to claim 1, characterized in that: The auxiliary agent consists of a dispersant, a leveling agent, and an anti-rust and anti-corrosion agent, and the mass ratio of the dispersant, the leveling agent, and the anti-rust and anti-corrosion agent is 2:1:

3.

5. The one-component anticorrosion and antirust water-based reactive primer according to claim 4, characterized in that: The anticorrosion and rust inhibitor is an aminophosphate compound.

6. The one-component anticorrosion and antirust water-based reactive primer according to claim 5, characterized in that: The amino phosphate compound includes one or more of 2-aminoethyl-2,3-dihydroxypropyl-hydroxyphosphate, ethanolamine phosphate, and (2-aminoethyl) diethyl phosphate.

7. The one-component anticorrosion and antirust water-based reactive primer according to claim 1, characterized in that: The color paste includes one or more of phthalocyanine blue, lemon yellow, and permanent red.

8. The one-component anticorrosion and antirust water-based reactive primer according to claim 1, characterized in that: The filler includes one or more of calcium carbonate, talcum powder and mica powder.

9. The one-component anticorrosion and antirust water-based reactive primer according to claim 4, characterized in that: It also includes at least one of the following technical features: The dispersant includes one or more of BYK-180, BYK-181, and TEGO-735; The leveling agent includes one or two of polydimethylsiloxane and allyl hydroxyethyl ether.

10. The method for preparing a one-component anticorrosion and antirust water-based reactive primer according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1. Weigh water-based modified acrylic resin, silicone resin, filler, additive, hydrochloric acid and water, and disperse them evenly to obtain a mixture; S2. Add the color paste into the mixture and mix well to obtain a single-component anti-corrosion and anti-rust water-based reactive primer.

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