CN-122011898-A - Anti-aging super-hydrophobic steel structure anti-corrosion coating material and preparation method thereof

Abstract

The invention discloses an anti-aging super-hydrophobic steel structure anti-corrosion coating material, which relates to the technical field of anti-corrosion coating materials and comprises, by weight, 30-35 parts of fluorine modified hydrogenated bisphenol A epoxy resin, 15-20 parts of epoxy-terminated fluorosilicone polymer, 5-8 parts of graphene oxide, 3-5 parts of phosphorus iron powder, 6-8 parts of titanium dioxide, 10-12 parts of silica powder and 2.5-3 parts of auxiliary agent, and (2) 28-38 parts of fatty amine curing agent and 6-9 parts of curing accelerator. According to the invention, the epoxy resin is modified and the epoxy-terminated fluorosilicone polymer is added, so that the prepared coating has excellent superhydrophobicity and ageing resistance.

Inventors

• SONG ZHONGTAO
• XU CHUNXIAO
• LI LING
• LUO ZHICHONG
• SONG ZHIYU
• LU XIAN
• WANG YIWEI
• Ling Guangyang
• FENG QINGLIAN
• FU JIANYONG

Assignees

• 广西永安华夏新材料有限公司

Dates

Publication Date

20260512

Application Date

20260306

Claims (10)

1. 1. An anti-aging super-hydrophobic steel structure anti-corrosion coating material is characterized by comprising the following substances: (1) The component A comprises the following raw materials in parts by weight: 30-35 parts of fluorine modified hydrogenated bisphenol A epoxy resin, 15-20 parts of epoxy-terminated fluorosilicone polymer, 5-8 parts of graphene oxide, 3-5 parts of phosphorus iron powder, 6-8 parts of titanium dioxide, 10-12 parts of silicon micropowder and 2.5-3 parts of auxiliary agent; (2) The component B comprises the following raw materials in parts by weight: 28-38 parts of fatty amine curing agent and 6-9 parts of curing accelerator.
2. 2. The anti-aging super-hydrophobic steel structure anti-corrosion coating material according to claim 1, wherein the fluorine modified hydrogenated bisphenol A epoxy resin is a hydrogenated bisphenol A epoxy resin containing fluorine side chains, which is synthesized by esterification reaction of hydrogenated bisphenol A epoxy resin and perfluoroalkanoic acid under the condition of 50-55 ℃ under the action of a toluenesulfonic acid catalyst.
3. 3. The anti-aging super-hydrophobic steel structure anti-corrosion coating material according to claim 2, wherein the perfluoroalkanoic acid is one of perfluorobutyric acid, perfluorocaprylic acid and perfluorocapric acid.
4. 4. The anti-aging super-hydrophobic steel structure anti-corrosion coating material according to claim 2, wherein the molar ratio of the hydrogenated bisphenol A epoxy resin to the perfluoroalkanoic acid is 1:3-4.
5. 5. The anti-aging super-hydrophobic steel structure anti-corrosion coating material according to claim 1, wherein the preparation process of the epoxy-terminated fluorosilicone polymer is as follows: Dissolving trifluoro propyl methyl cyclotrisiloxane in 10-15 times absolute ethyl alcohol solvent, carrying out ring-opening bulk polymerization reaction for 1-2h at 35-40 ℃ under the action of alkali metal initiator, then adding (3-glycidoxypropyl) dimethyl ethoxysilane, continuing to react for 2h, and removing the solvent at low vacuum temperature to obtain the epoxy-terminated fluorosilicone polymer.
6. 6. The anti-aging super-hydrophobic steel structure anti-corrosion coating material according to claim 5, wherein the molar ratio of the trifluoropropyl methyl cyclotrisiloxane to the (3-glycidoxypropyl) dimethylethoxysilane is 5-7:1.
7. 7. The anti-aging super-hydrophobic steel structure anti-corrosion coating material according to claim 5, wherein the amount of the alkali metal initiator is 1% of the total weight of the solution.
8. 8. The anti-aging super-hydrophobic steel structure anti-corrosion coating material according to claim 1, wherein the fatty amine curing agent is prepared by mixing polyetheramine D230 and isophorone diamine according to a mass ratio of 1:1.
9. 9. The anti-aging super-hydrophobic steel structure anti-corrosion coating material according to claim 1, wherein the auxiliary agent comprises a defoaming agent BYK-065, a leveling agent PV88 and a dispersing agent BYK-P104 in a mass ratio of 0.5:1:1.
10. 10. The method for preparing the anti-aging super-hydrophobic steel structure anti-corrosion coating material according to any one of claims 1 to 9, which is characterized by comprising the following preparation steps: Mixing fluorine modified hydrogenated bisphenol A epoxy resin, epoxy silicon polymer, graphene oxide and ferrophosphorus powder, stirring and dispersing for 10min, adding titanium pigment, silicon micropowder and auxiliary agent, continuing stirring and dispersing for 20min to obtain a component A, mixing and stirring an aliphatic amine curing agent and a curing accelerator for 5min to obtain a component B, uniformly mixing the component A and the component B, and coating and curing to obtain the anti-corrosion coating material.

Description

Anti-aging super-hydrophobic steel structure anti-corrosion coating material and preparation method thereof Technical Field The invention relates to the technical field of anti-corrosion coating, in particular to an anti-aging super-hydrophobic steel structure anti-corrosion coating material and a preparation method thereof. Background The super-hydrophobic coating has the characteristics of excellent hydrophobicity, non-wettability and self-cleaning, a layer of air film is formed on the interface of the surface of the metal substrate, which is contacted with water, so that the direct contact between the aqueous medium and the surface of the substrate can be inhibited, the penetration of the corrosive medium into the coating is effectively prevented, the contact between the metal and the corrosive medium is isolated, the corrosion rate is greatly reduced, and the corrosion resistance of the coating can be improved and other application functions are increased at the same time when the super-hydrophobic modification is carried out on the coating. Among the many anticorrosive coatings, epoxy resin is widely used as one of coating materials, which has good adhesive force, chemical resistance and mechanical properties, but is widely used as a coating, but has the problems of insufficient ageing resistance, high surface energy, insufficient hydrophobicity and the like, so that the application of the epoxy resin in the anticorrosive field is limited. In order to improve ageing resistance and hydrophobicity, an epoxy coating is required to be modified, epoxy is modified through low-surface-energy substances such as fluorine and the like, for example, chinese patent publication No. CN 115403991B discloses a super-hydrophobic epoxy anti-corrosion coating and a preparation method thereof, wherein the super-hydrophobic epoxy anti-corrosion coating is obtained through the reaction of medium-short-chain perfluoroalkanoic acid and an aliphatic amine curing agent, the low-surface-energy fluoroamine curing agent is obtained, and a low-surface-energy fluorine-containing material is introduced into epoxy resin, so that the coating has excellent super-hydrophobicity, but the epoxy resin is bisphenol A epoxy resin which contains benzene rings, double bonds in the benzene rings are easy to age, and the overall ageing resistance of the coating is insufficient. Disclosure of Invention Aiming at the problems, the technical problem to be solved by the invention is to provide an anti-aging super-hydrophobic steel structure anti-corrosion coating material which has good anti-aging and super-hydrophobic properties. In order to solve the technical problems, the invention adopts the following technical scheme: An anti-aging super-hydrophobic steel structure anti-corrosion coating material comprises the following substances: (1) The component A comprises the following raw materials in parts by weight: 30-35 parts of fluorine modified hydrogenated bisphenol A epoxy resin, 15-20 parts of epoxy-terminated fluorosilicone polymer, 5-8 parts of graphene oxide, 3-5 parts of phosphorus iron powder, 6-8 parts of titanium dioxide, 10-12 parts of silicon micropowder and 2.5-3 parts of auxiliary agent; (2) The component B comprises the following raw materials in parts by weight: 28-38 parts of fatty amine curing agent and 6-9 parts of curing accelerator. As one-step improvement, the fluorine modified hydrogenated bisphenol A epoxy resin is hydrogenated bisphenol A epoxy resin containing fluorine side chains, which is synthesized by esterification reaction of hydrogenated bisphenol A epoxy resin and perfluoroalkanoic acid under the action of a toluenesulfonic acid catalyst at the temperature of 50-55 ℃. As a further improvement of the invention, the perfluoroalkanoic acid is one of perfluorobutyric acid, perfluorooctanoic acid and perfluorodecanoic acid. As a further improvement of the invention, the molar ratio of the hydrogenated bisphenol A epoxy resin to the perfluoroalkanoic acid is 1:3-4. As a further improvement of the invention, the preparation process of the epoxy-terminated fluorosilicone polymer comprises the following steps: Dissolving trifluoro propyl methyl cyclotrisiloxane in 10-15 times absolute ethyl alcohol solvent, carrying out ring-opening bulk polymerization reaction for 1-2h at 35-40 ℃ under the action of alkali metal initiator, then adding (3-glycidoxypropyl) dimethyl ethoxysilane, continuing to react for 2h, and removing the solvent at low vacuum temperature to obtain the epoxy-terminated fluorosilicone polymer. The molecular structural formula of the epoxy-terminated fluorosilicone polymer is as follows: as a further improvement of the invention, the molar ratio of the trifluoropropyl methyl cyclotrisiloxane to the (3-glycidoxypropyl) dimethylethoxysilane is 5-7:1. As a further development of the invention, the alkali metal initiator is used in an amount of 1% by weight relative to the total weight of the solution. As a furth