CN-121227162-B - Abrasion-resistant industrial paint and manufacturing method thereof

Abstract

The invention relates to an abrasion-resistant industrial paint and a manufacturing method thereof, belonging to the technical field of paint, wherein the paint comprises modified epoxy resin liquid, modified phenolic resin liquid, zirconium boride powder, silicon carbide powder, hexagonal boron nitride powder, flaky zinc-aluminum alloy powder, methyl hexahydrophthalic anhydride, hexamethoxy methyl melamine and the like. The modified epoxy resin liquid is obtained by modifying hydrogenated bisphenol A epoxy resin by hydroxyl end capped trifluoro propyl methyl polysiloxane, and the modified phenolic resin liquid is obtained by mixing phenolic novolac resin after etherification with soluble polyimide powder. The invention adopts the composite base material formed by hydrogenated epoxy resin and phenolic resin and combines the silicon fluorine modification and polyimide enhancement technology, so that the coating has the strong adhesive force of the epoxy resin and the high temperature resistance of the phenolic resin, can still keep the chemical bonding force with a metal substrate in a high temperature environment, is matched with functional fillers for use, has low increment after temperature resistance, and forms a wear-resistant system of hard framework and soft lubrication, and is corrosion-resistant.

Inventors

• WANG ZEJI
• YU CHENGLIN
• WANG SHUO

Assignees

• 中华制漆(新丰）有限公司

Dates

Publication Date

20260512

Application Date

20251031

Claims (6)

1. 1. The anti-abrasion industrial coating is characterized by comprising, by mass, 45-55 parts of modified epoxy resin liquid, 15-20 parts of modified phenolic resin liquid, 8-12 parts of zirconium boride powder, 10-15 parts of silicon carbide powder, 0.5-1 part of hexagonal boron nitride powder, 18-22 parts of flaky zinc-aluminum alloy powder, 6-7 parts of methyl hexahydrophthalic anhydride, 3-4 parts of hexamethoxy methyl melamine, 0.3-0.5 part of accelerator, 0.2-0.4 part of catalyst, 1.5-2 parts of dispersing agent, 1.0-1.5 parts of thixotropic agent, 0.3-0.5 part of defoamer and 40 parts of mixed solvent I and 45 parts of mixed solvent I; the preparation method of the modified epoxy resin liquid comprises the steps of compounding mixed liquid according to the mass ratio of hydrogenated bisphenol A epoxy resin, namely hydroxyl end-capped trifluoropropyl methyl polysiloxane=1 (0.8-1.2), adding propylene glycol methyl ether acetate with the mass 1-1.5 times of that of the mixed liquid and tetraisopropyl titanate with the mass 0.2-0.3% of that of the hydroxyl end-capped trifluoropropyl methyl polysiloxane, stirring, reacting for 3-4 hours at 90-95 ℃, and cooling to room temperature to obtain the modified epoxy resin liquid; Dissolving phenolic novolac resin in a mixed solvent II with the temperature of 78-82 ℃, adding benzyl alcohol with the weight of 15-20% of the phenolic novolac resin and p-toluenesulfonic acid with the weight of 0.5-1.0% of the phenolic novolac resin, carrying out reflux etherification reaction for 2-2.5 hours with the temperature of 110-120 ℃ under the protection of nitrogen, adding soluble polyimide powder with the weight of 10-15% of the phenolic novolac resin and BYK-110 dispersing agent with the weight of 0.4-0.6% of the phenolic novolac resin, carrying out reflux stirring for 1-2 hours with the temperature of 110-120 ℃ and 600-800 rpm, cooling to room temperature, adding BHT antioxidant with the weight of 0.1-0.2% of the phenolic novolac resin, and stirring and mixing to obtain the modified phenolic resin liquid; The consumption of the mixed solvent II is 1.5-2 times of the mass of the phenolic novolac resin, and the mixed solvent II is a mixed solvent with the mass ratio of N, N-dimethylformamide to isopropanol of (3-5) to (1-2).
2. 2. The abrasion-resistant industrial paint according to claim 1, wherein in the preparation method of the modified epoxy resin liquid, the stirring is carried out for 20-30 min at 55-60 ℃.
3. 3. The abrasion-resistant industrial paint according to claim 1, wherein the particle sizes of the zirconium boride powder, the silicon carbide powder, the hexagonal boron nitride powder and the flaky zinc-aluminum alloy powder are all in a range of 800-900 meshes.
4. 4. The abrasion-resistant industrial paint disclosed by claim 1 is characterized in that the accelerator is benzyl dimethylamine, the catalyst is p-toluenesulfonic acid, the dispersing agent is BYK-2155 wetting dispersing agent, the thixotropic agent is prepared by compounding polyamide wax and fumed silica according to the mass ratio of (1-1.2) (1.5-1.8), the antifoaming agent is BYK-1790 antifoaming agent, and the mixed solvent I is prepared by compounding N, N-dimethylformamide, dimethylbenzene and butanol according to the mass ratio of (5-6) (3-4) (2-3).
5. 5. A method of producing an abrasion-resistant industrial paint according to claim 1, comprising the steps of: Adding the modified epoxy resin liquid and the modified phenolic resin liquid into the mixed solvent I according to the parts by weight, stirring to obtain a base material, sequentially adding the dispersing agent, the zirconium boride powder and the silicon carbide powder into the base material, stirring, then adding the hexagonal boron nitride powder, the thixotropic agent and the defoaming agent, shearing and activating, sequentially adding the catalyst, the methyl hexahydrophthalic anhydride, the hexamethoxy methyl melamine and the accelerator under the stirring condition, stirring, adding the flaky zinc-aluminum alloy powder, and stirring to obtain the coating.
6. 6. The method for manufacturing the abrasion-resistant industrial paint according to claim 5, wherein a mixed solvent I is added into a modified epoxy resin liquid and a modified phenolic resin liquid, stirring is carried out at 60-65 ℃ and 300-400 rpm for 20-30 min to obtain a base material, a dispersing agent, zirconium boride powder and silicon carbide powder are sequentially added into the base material, stirring is carried out at 150-200 rpm for 20-30 min, then hexagonal boron nitride powder, a thixotropic agent and a defoaming agent are added, shearing and activating are carried out at 60-65 ℃ and 600-800 rpm for 8-12 min, the temperature is reduced to below 40 ℃, and under the stirring condition of 200-250 rpm, a catalyst, methyl hexahydrophthalic anhydride, hexamethoxy methyl melamine and an accelerator are sequentially added, stirring is carried out at 300-400 rpm for 10 min-20 min, and sheet zinc-aluminum alloy powder is added into the base material, and stirring is carried out at 150-200 rpm for 5 min-10 min to obtain the paint.

Description

Abrasion-resistant industrial paint and manufacturing method thereof Technical Field The invention belongs to the technical field of paint, and particularly relates to an abrasion-resistant industrial paint and a manufacturing method thereof. Background In the field of industrial production, mechanical equipment generally needs to be coated with paint for corrosion and wear protection, and the performance of the anti-abrasion industrial paint is realized by the collaborative design of resin base materials, functional fillers and auxiliary agents. For example, the resin base material is used as a film forming substance to determine the basic performance of the coating, the epoxy resin can provide excellent adhesive force and chemical stability due to the chemical bonding force of the epoxy group and the metal base material in the molecular structure, the polyurethane resin balances the hardness and flexibility of the coating by adjusting the proportion of soft/hard segments, the coating is suitable for dynamic friction working conditions, and the fluorocarbon resin endows the coating with outstanding weather resistance and chemical inertness by virtue of the high bond energy characteristic of C-F bonds. Functional fillers are key components to enhance the coating properties. The wear-resistant filler such as alumina (Al 2O3), silicon carbide (SiC) and other ceramic particles forms a wear-resistant skeleton structure in the coating by utilizing the high hardness characteristic, the corrosion-resistant filler is represented by zinc powder, aluminum powder and other metal powder, preferentially generates oxidation reaction in a corrosion environment by a sacrificial anode principle, consumes a corrosion medium and protects a metal substrate, and the nanoscale filler such as nano titanium dioxide (TiO 2) and graphene can obviously improve the physical barrier property of the coating and delay the diffusion rate of the corrosion medium by virtue of the high specific surface area and a lamellar structure. In addition, the additive system realizes performance enhancement by optimizing the coating construction performance and the coating structure. The dispersing agent can prevent filler from agglomerating, ensure the uniformity of the coating, the curing agent and resin are crosslinked to form a compact network structure, the hardness and the chemical stability are improved, and the rheological agent adjusts the viscosity of the coating and is suitable for different construction process requirements such as spraying, brushing and the like. The prior art realizes the cooperative promotion of the abrasion resistance through component compounding and process optimization. However, under extreme working conditions such as high temperature, strong scouring and the like, the coating still faces the challenges of reduced binding force, insufficient temperature resistance and the like, so that corrosion resistance and wear resistance are affected. Therefore, various performances of the whole coating are required to be designed by combining the working temperature environment, so that the coating can be ensured to continuously maintain good service performance in a severe environment, and the performance bottleneck is further broken through. Disclosure of Invention Aiming at the problems that the existing paint has poor stability in a high-temperature environment, influences the performances of adhesive force, corrosion resistance, wear resistance and the like, and reduces the protectiveness, the invention provides an abrasion-resistant industrial paint and a manufacturing method thereof, and the composite base material formed by hydrogenated epoxy resin and phenolic resin is combined with a silicon fluorine modification and polyimide enhancement technology, so that the coating has the strong adhesive force of the epoxy resin and the high-temperature resistance of the phenolic resin, and can still keep the chemical binding force with a metal substrate in the high-temperature environment; the wear-resistant filler is used for constructing a wear-resistant skeleton, is matched with the lubricating action of hexagonal boron nitride, has low initial wear-resistant mass loss and low increment after temperature resistance, forms a wear-resistant system of hard skeleton and soft lubrication, adopts flake zinc-aluminum alloy powder to consume corrosive media through a sacrificial anode mechanism and resists salt spray corrosion. The specific technical scheme is as follows: The anti-abrasion industrial coating comprises, by mass, 45-55 parts of modified epoxy resin liquid, 15-20 parts of modified phenolic resin liquid, 8-12 parts of zirconium boride powder, 10-15 parts of silicon carbide powder, 0.5-1 part of hexagonal boron nitride powder, 18-22 parts of flaky zinc-aluminum alloy powder, 6-7 parts of methyl hexahydrophthalic anhydride, 3-4 parts of hexamethoxy methyl melamine, 0.3-0.5 part of accelerator, 0.2-0.4 part of catalyst,