CN-122011890-A - Environment-friendly high-temperature-resistant wear-resistant epoxy resin anticorrosive paint and preparation method thereof

Abstract

The invention relates to the technical field of environment-friendly epoxy resin paint, in particular to environment-friendly high-temperature-resistant wear-resistant epoxy resin anticorrosive paint and a preparation method thereof, wherein the environment-friendly high-temperature-resistant wear-resistant epoxy resin anticorrosive paint comprises, by weight, 30-50 parts of an aqueous epoxy resin emulsion, 0.4-0.8 part of a dispersing agent, 0.3-0.5 part of a leveling agent, 0.3-0.5 part of a defoaming agent, 0.4-0.8 part of a wetting agent, 0.4-0.6 part of a thickening agent, 5-10 parts of an antirust pigment, 0.3-0.5 part of an anti-flash rust agent, 3-5 parts of precipitated barium sulfate, 8-10 parts of a modified filler and 10-30 parts of deionized water, and the component B comprises, by weight, 3-5 parts of an epoxy curing agent and 4-6 parts of deionized water, wherein the molar ratio of epoxy groups in the aqueous epoxy resin emulsion to amino groups in the epoxy curing agent is 1 (1.1-1.3). The epoxy resin coating prepared by the invention has excellent high temperature resistance, wear resistance and corrosion resistance.

Inventors

• TANG YUKUAN
• CAI JINGGANG
• DING LIJUN

Assignees

• 江苏振华造漆有限公司

Dates

Publication Date

20260512

Application Date

20260327

Claims (10)

1. 1. The environment-friendly high-temperature-resistant wear-resistant epoxy resin anticorrosive paint is composed of a component A and a component B, and is characterized in that the component A comprises, by weight, 30-50 parts of an aqueous epoxy resin emulsion, 0.4-0.8 part of a dispersing agent, 0.3-0.5 part of a leveling agent, 0.3-0.5 part of a defoaming agent, 0.4-0.8 part of a wetting agent, 0.4-0.6 part of a thickening agent, 5-10 parts of an antirust pigment, 0.3-0.5 part of an anti-flash rust agent, 3-5 parts of precipitated barium sulfate, 8-10 parts of a modified filler and 10-30 parts of deionized water, wherein the component B comprises, by weight, 5-7 parts of an epoxy curing agent and 4-6 parts of deionized water, and the molar ratio of an epoxy group in the aqueous epoxy resin emulsion to an amino group in the epoxy curing agent is 1 (1.1-1.3).
2. 2. The environment-friendly high-temperature-resistant and wear-resistant epoxy resin anticorrosive paint according to claim 1, wherein the rust-proof pigment is one or more of titanium iron powder, zinc phosphate and zinc tripolyphosphate.
3. 3. The environment-friendly high-temperature-resistant and wear-resistant epoxy resin anticorrosive paint according to claim 1, wherein the anti-flash rust agent is an organic zinc chelate anti-flash rust agent.
4. 4. The environment-friendly high-temperature-resistant and wear-resistant epoxy resin anticorrosive paint as claimed in claim 1, wherein the preparation method of the modified filler comprises the following steps: A1, adding silicon micropowder and magnesium aluminum hydrotalcite into deionized water, carrying out ultrasonic treatment for 30-60min, regulating the pH value to 8-9, dropwise adding a cerium nitrate solution with the concentration of 0.05-0.15mol/L, stirring at room temperature for 20-40min, dropwise adding a diammonium phosphate aqueous solution with the concentration of 0.05-0.15mol/L, heating to 55-65 ℃ for continuous reaction for 3-5h, cooling to room temperature, centrifuging, washing, and vacuum drying to obtain a composite filler; A2, adding the composite filler obtained in the step A1 and KH-550 into ethanol water solution, heating to 65-75 ℃ for reaction for 4-6h, centrifuging, washing and drying to obtain the modified filler.
5. 5. The environment-friendly high-temperature-resistant and wear-resistant epoxy resin anticorrosive paint according to claim 4, wherein the mass ratio of the silicon micro powder to the magnesium aluminum hydrotalcite is 1 (0.10-0.15).
6. 6. The environment-friendly high-temperature-resistant and wear-resistant epoxy resin anticorrosive paint according to claim 4, wherein the proportion of the silicon micropowder and the cerium nitrate solution with the concentration of 0.05-0.15mol/L is 1g (0.45-0.55 ml).
7. 7. The environment-friendly high-temperature-resistant and wear-resistant epoxy resin anticorrosive paint according to claim 4, wherein the molar ratio of cerium nitrate to diammonium hydrogen phosphate is 1 (1-1.5).
8. 8. The environment-friendly high-temperature-resistant and wear-resistant epoxy resin anticorrosive paint according to claim 4, wherein the mass ratio of the composite filler to KH-550 in the step A2 is 1 (0.015-0.025).
9. 9. A method for preparing the environment-friendly high-temperature-resistant wear-resistant epoxy resin anticorrosive paint as claimed in any one of claims 1 to 8, which is characterized by comprising the following steps: s1, adding deionized water into a reaction container, sequentially adding a dispersing agent, a wetting agent and a part of defoaming agent at a rotating speed of 300-500rpm, stirring for 5-10min, adding an anti-rust pigment, an anti-flash rust agent, precipitated barium sulfate and modified filler at 700-900rpm, lifting the rotating speed to 900-1100rpm, stirring for 10-20min, reducing the rotating speed to 500-700rpm, continuously adding aqueous epoxy resin emulsion, stirring for 5-15min, adding a leveling agent, a thickening agent and the rest of defoaming agent, stirring for 10-15min, and filtering to obtain a component A; S2, adding the epoxy curing agent into deionized water, and stirring at 300-500rpm for 8-12min to obtain a component B; And S3, mixing the component A obtained in the step S1 and the component B obtained in the step S2 at room temperature when in use, and stirring at 300-400rpm for 20-30min to obtain the environment-friendly high-temperature-resistant wear-resistant epoxy resin anticorrosive paint.
10. 10. The method of claim 9, wherein the epoxy curing agent is a nonionic epoxy curing agent.

Description

Environment-friendly high-temperature-resistant wear-resistant epoxy resin anticorrosive paint and preparation method thereof Technical Field The invention relates to the technical field of environment-friendly epoxy resin coating, in particular to an environment-friendly high-temperature-resistant wear-resistant epoxy resin anticorrosive coating and a preparation method thereof. Background The epoxy resin coating is widely applied to equipment protection in the industrial fields of aerospace, petrochemical industry, heavy machinery and the like due to excellent adhesive force, chemical resistance and mechanical properties. However, the traditional epoxy resin coating has a core technical bottleneck, is difficult to simultaneously consider the environmental protection performance, the high temperature resistance performance and the wear resistance performance, and cannot adapt to the complex severe working condition of equipment in the field at high temperature and high speed friction for a long time. In the prior art, the conventional epoxy coating mostly adopts a bisphenol A type epoxy and aliphatic amine curing system, a coating molecular chain is easy to degrade and a crosslinking network is damaged in a high-temperature environment, so that the coating is cracked and pulverized to lose a protective effect, and meanwhile, the wear resistance is insufficient, and the coating is easy to wear and scratch under heavy-load friction. In addition, the VOC emission of the traditional solvent-based epoxy paint exceeds the standard, and does not meet the current environmental regulation requirement, while the water-based and solvent-free epoxy paint can reduce the VOC emission, the problems of obvious attenuation of heat resistance and wear resistance exist. In the prior art, patent CN119978961B discloses a corrosion-resistant epoxy resin coating, which consists of a component 1 and a component 2, wherein the component 1 comprises bisphenol A type epoxy resin, corrosion-resistant illite, a defoaming agent, an antioxidant, an ultraviolet absorbent and deionized water, and the component 2 comprises a heat-resistant crosslinking curing agent and a leveling agent, and the corrosion-resistant illite and the heat-resistant crosslinking curing agent are prepared to participate in the preparation process of the epoxy resin coating, so that the prepared epoxy resin coating has excellent mechanical strength, wear resistance and heat resistance. However, the epoxy resin adopts deionized water as a solvent, and does not use additives such as dispersing agents and the like, so that bubbles/pinholes can easily appear in the coating, and the corrosion resistance of the coating is affected. The patent CN1200595999A discloses a modified epoxy resin waterproof coating with high environment-friendly flexibility and a preparation method thereof, wherein the modified epoxy resin waterproof coating comprises, by mass, 40-50 parts of modified epoxy resin, 10-15 parts of polyurethane, 8-12 parts of isocyanate, 15-20 parts of an asymmetric amino curing agent, 2-5 parts of nano graphene, 3-6 parts of a polyester toughening agent, 1-2 parts of a metal organic catalyst, 0.5-1 part of a defoaming agent and 2-3 parts of an accelerator. The invention combines the metal organic catalyst and polyurethane, thereby accelerating the curing speed of the coating. The improvement greatly shortens the curing time of the coating after construction, and compared with the problem of overlong curing time in the prior art, the coating not only improves the construction efficiency, but also reduces unstable performance caused by incomplete curing, and ensures high quality and high-efficiency completion of the coating. However, the flexible chain segments such as polyurethane, polyester toughening agent and the like in the formula provide flexibility, but can obviously reduce the glass transition temperature of the whole system, and influence the high temperature resistance of the coating. Therefore, there is a need in the market for an environment-friendly epoxy resin coating with excellent high temperature resistance and corrosion resistance. Disclosure of Invention Aiming at the problems existing in the prior art, the invention aims to obtain the environment-friendly epoxy resin coating with excellent high temperature resistance, wear resistance and wear resistance. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: The invention provides an environment-friendly high-temperature-resistant wear-resistant epoxy resin anticorrosive paint which comprises, by weight, 30-50 parts of an aqueous epoxy resin emulsion, 0.4-0.8 part of a dispersing agent, 0.3-0.5 part of a leveling agent, 0.3-0.5 part of a defoaming agent, 0.4-0.8 part of a wetting agent, 0.4-0.6 part of a thickening agent, 5-10 parts of an antirust pigment, 0.3-0.5 part of an anti-flash rust agent, 3-5 parts of precipitated barium sulfate, 8-10 parts