High hardness super wear resistant coating and its applications

Abstract

The application provides a high-hardness super-wear-resistant coating and application thereof, and belongs to the technical field of coatings. The application introduces an unsaturated resin curing system on the basis of a rigid aromatic epoxy resin system, and realizes free radical initiation polymerization under room temperature conditions through an organic peroxide-amine modified compound curing agent to form a molecular-level double-system interpenetrating network structure, which greatly enhances the crosslinking density and cohesive strength of the coating, and exhibits extremely high hardness and wear resistance. The hardness and wear resistance can be further improved by assisting with ceramic powder, silicon nitride powder and polytetrafluoroethylene modified wax powder. The results of the examples show that the pencil hardness of the coating of the coating provided by the application after room temperature curing for 7 days reaches 7H, and the taber abrasion index reaches 4.6mg / 1000r (H-10 grinding wheel, 1kg load).

Description

Technical Field

[0001] This invention belongs to the field of coating technology, specifically relating to a high-hardness, ultra-wear-resistant coating and its application. Background Technology

[0002] High-hardness, ultra-wear-resistant coatings are a new type of special functional coating used to coat substrate surfaces to prevent wear and corrosion. In the global modern coatings industry, this type of coating accounts for 20-30% of functional coatings and is widely used in areas subjected to high-speed airflow, sand, and water flow impacts, such as sewage pipes, pumps, fans, water and electricity pipelines, ship decks, and road signs, significantly extending the service life of components.

[0003] Currently, mainstream wear-resistant coatings mainly rely on improving the coating's scratch resistance, elastic energy absorption, and high hardness and rigidity cohesive strength to achieve wear resistance. This is manifested in the use of elastic rubber and rigid resin as the base resin, while introducing wear-resistant fillers, such as inorganic rigid fillers like ceramic powder, silicon nitride powder, glass powder, and silica powder, as well as organic fillers like polytetrafluoroethylene modified wax powder and ultra-high molecular weight polymers. With the continuous increase in requirements for hardness and wear resistance, how to improve coatings to further enhance hardness and wear resistance has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0004] The purpose of this invention is to provide a high-hardness, ultra-wear-resistant coating and its application. The coating prepared by the present invention possesses high hardness and ultra-wear resistance.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution: This invention provides a high-hardness, ultra-wear-resistant coating, comprising component A and component B; Component A is prepared from raw materials comprising the following parts by mass: 30-45 parts of aromatic epoxy resin, 5-15 parts of allyl bisphenol A epoxy resin 3-5 parts styrene 20-40 parts ceramic powder 10-30 parts of silicon nitride powder 3-5 parts of polytetrafluoroethylene modified wax powder, 0.3 to 1 part of coupling agent, And 0.01~0.1 parts of polymerization inhibitor; Component B is prepared from raw materials comprising the following parts by mass: 60-85 parts of phenolic amine 10-30 parts of polyetheramine, 0.1 to 1 part of organic peroxide, Mix 3-10 parts of benzyl alcohol.

[0006] Preferably, the aromatic epoxy resin is at least one of phenolic epoxy resin, o-cresol epoxy resin, resorcinol-type epoxy resin, and naphthalene-type epoxy resin.

[0007] Preferably, the coupling agent is at least one selected from silane coupling agents, titanate coupling agents, and aluminate coupling agents.

[0008] Preferably, the polymerization inhibitor is at least one selected from p-benzoquinone, o-sec-butyl-4,6-dinitrophenol, and 2,6-di-tert-butyl-4-methylpyridine.

[0009] Preferably, the phenolic amine is prepared by mixing phenol, paraformaldehyde and aromatic amine, and carrying out a polymerization reaction to obtain the phenolic amine.

[0010] Preferably, the aromatic amine is at least one selected from m-phenylenediamine, p-phenylenediamine, p-phenylenediamine, diaminodiphenylmethane, and diaminodiphenyl ether.

[0011] Preferably, the polyetheramine is at least one of polyetheramine D230, polyetheramine D400, and polyetheramine D2000.

[0012] Preferably, the organic peroxide is at least one of benzoyl peroxide, tert-butyl hydroperoxide, and dibutyl cyclohexanone peroxide.

[0013] The present invention also provides a coating, the composition of which is the high-hardness ultra-wear-resistant coating described in the above technical solution.

[0014] The present invention also provides the application of the high-hardness ultra-wear-resistant coating or the coating described in the above technical solution in petrochemical pipelines, sewage pipelines and air ducts.

[0015] This invention provides a high-hardness, ultra-wear-resistant coating, comprising component A and component B. Component A is prepared from raw materials comprising the following parts by weight: 30-45 parts aromatic epoxy resin, 5-15 parts allyl bisphenol A epoxy resin, 3-5 parts styrene, 20-40 parts ceramic powder, 10-30 parts silicon nitride powder, 3-5 parts polytetrafluoroethylene modified wax powder, 0.3-1 parts coupling agent, and 0.01-0.1 parts polymerization inhibitor. Component B is prepared from raw materials comprising the following parts by weight: 60-85 parts phenolic amine, 10-30 parts polyether amine, 0.1-1 parts organic peroxide, and 3-10 parts benzyl alcohol. This invention introduces an unsaturated resin (allyl bisphenol A epoxy resin and styrene) curing system into a rigid aromatic epoxy resin system. It achieves free radical-initiated polymerization at room temperature by modifying an organic peroxide-amine composite curing agent, forming a molecular-level interpenetrating network structure. This significantly enhances the crosslinking density and cohesive strength of the coating, resulting in extremely high hardness and wear resistance. Further enhancement with ceramic powder, silicon nitride powder, and polytetrafluoroethylene-modified wax powder can further improve hardness and wear resistance. The results of the examples show that the coating provided by this invention achieves a pencil hardness of 7H and a Tiber abrasion index of 4.6 mg / 1000r (H-10 grinding wheel, 1 kg load) after 7 days of room temperature curing. Detailed Implementation

[0016] This invention provides a high-hardness, ultra-wear-resistant coating, comprising component A and component B; Component A is prepared from raw materials comprising the following parts by mass: 30-45 parts of aromatic epoxy resin, 5-15 parts of allyl bisphenol A epoxy resin 3-5 parts styrene 20-40 parts ceramic powder 10-30 parts of silicon nitride powder 3-5 parts of polytetrafluoroethylene modified wax powder, 0.3 to 1 part of coupling agent, And 0.01~0.1 parts of polymerization inhibitor; Component B is prepared from raw materials comprising the following parts by mass: 60-85 parts of phenolic amine 10-30 parts of polyetheramine, 0.1 to 1 part of organic peroxide, Mix 3-10 parts of benzyl alcohol.

[0017] This invention does not impose any special restrictions on the source of the raw materials; commercially available products familiar to those skilled in the art can be used.

[0018] In this invention, the raw materials for preparing the high-hardness, ultra-wear-resistant coating include component A. In this invention, component A is a resin component.

[0019] In this invention, the raw materials for preparing component A, by weight, include 30-45 parts of aromatic epoxy resin; the aromatic epoxy resin is preferably at least one of phenolic epoxy resin, o-cresol epoxy resin, resorcinol-type epoxy resin, and naphthalene-type epoxy resin. In this invention, the aromatic epoxy resin possesses extremely high regularity and rigidity, imparting basic hardness and wear resistance to the coating. Combined with styrene and allyl bisphenol A epoxy resin, it can form a bipolar interpenetrating network structure of epoxy-amine system and double-bond free radical copolymerization, further enhancing the cohesive strength of the resin system, thereby improving its wear resistance.

[0020] In one embodiment, the aromatic epoxy resin may be in the form of 32-40 parts by weight, or 35-38 parts by weight.

[0021] Based on an aromatic epoxy resin mass fraction of 30-45 parts, the raw materials for preparing component A also include 5-15 parts of allyl bisphenol A epoxy resin. As one embodiment, the mass fraction of the allyl bisphenol A epoxy resin can be 6, 7, 8, 9, 10, 11, 12, 13, or 14 parts. In this invention, the allyl bisphenol A epoxy resin, aromatic epoxy resin, and styrene can form a bipolar interpenetrating network structure of epoxy-amine system and double bond free radical copolymerization, further enhancing the cohesive strength of the resin system and thus improving its wear resistance.

[0022] Based on an aromatic epoxy resin mass of 30-45 parts, the raw materials for preparing component A also include 3-5 parts styrene. As one embodiment, the mass of styrene can be 3.5 parts, 4 parts, or 4.5 parts. In this invention, the styrene, allyl bisphenol A epoxy resin, and aromatic epoxy resin can form a bipolar interpenetrating network structure of epoxy-amine system and double bond free radical copolymerization, further enhancing the cohesive strength of the resin system and thus improving its wear resistance.

[0023] Based on 30-45 parts by weight of aromatic epoxy resin, the raw materials for preparing component A also include 20-40 parts by weight of ceramic powder; the particle size of the ceramic powder is preferably 30-60 μm, more preferably 45 μm. As one embodiment, the mass fraction of the ceramic powder can be 22, 24, 25, 26, 28, 30, 32, 34, 36, or 38 parts. In this invention, the ceramic powder can further improve hardness and wear resistance.

[0024] Based on 30-45 parts by weight of aromatic epoxy resin, the raw materials for preparing component A also include 10-30 parts of silicon nitride powder; the particle size of the silicon nitride powder is preferably 30-60 μm, more preferably 45 μm. As one embodiment, the mass fraction of silicon nitride can be 12, 15, 18, 20, 22, 25, 26, 27, or 28 parts. In this invention, the silicon nitride powder can further improve hardness and wear resistance.

[0025] Based on 30-45 parts by weight of aromatic epoxy resin, the raw materials for preparing component A also include 3-5 parts of polytetrafluoroethylene modified wax powder; the particle size of the polytetrafluoroethylene modified wax powder is preferably 5-15 μm. As one embodiment, the mass fraction of the polytetrafluoroethylene modified wax powder can be 3.15 parts, 3.5 parts, 4 parts, or 4.5 parts. In this invention, the polytetrafluoroethylene modified wax powder can further improve hardness and wear resistance.

[0026] Based on 30-45 parts by weight of aromatic epoxy resin, the raw materials for preparing component A also include 0.3-1 parts by weight of coupling agent; the coupling agent is preferably at least one of silane coupling agent, titanate coupling agent, and aluminate coupling agent, more preferably a silane coupling agent. As one embodiment, the mass fraction of the coupling agent can be 0.4 parts, 0.5 parts, 0.6 parts, 0.7 parts, 0.8 parts, or 0.9 parts. In this invention, the coupling agent enables the inorganic filler to be uniformly dispersed in the resin matrix; the silane coupling agent has excellent adhesion to the silicon-based filler.

[0027] Based on 30-45 parts by weight of aromatic epoxy resin, the raw materials for preparing component A also include 0.01-0.1 parts by weight of a polymerization inhibitor; the polymerization inhibitor is preferably at least one selected from p-benzoquinone, o-sec-butyl-4,6-dinitrophenol, and 2,6-di-tert-butyl-4-methylpyridine. As one embodiment, the polymerization inhibitor can be in the following quantities: 0.02 parts, 0.03 parts, 0.04 parts, 0.05 parts, 0.06 parts, 0.07 parts, 0.08 parts, or 0.09 parts by weight. In this invention, the polymerization inhibitor can significantly extend the storage time of the base material and prevent the copolymerization of double bonds within the system from causing an increase in viscosity.

[0028] Based on an aromatic epoxy resin mass of 30-45 parts, the raw materials for preparing component A preferably also include 0-3 parts of fumed silica; the particle size of the fumed silica is preferably 30-40 nm. In this invention, the fumed silica mainly serves to prevent sedimentation, thereby increasing the viscosity of the system and preventing the sedimentation of inorganic fillers in the coating.

[0029] In one embodiment, the mass fraction of the fumed silica can be 0.8 parts, 1 part, or 2 parts.

[0030] In this invention, the preparation method of component A preferably includes the following steps: Aromatic epoxy resin, allyl bisphenol A epoxy resin, polymerization inhibitor, coupling agent and styrene are mixed to obtain a mixture; The mixture, fumed silica, polytetrafluoroethylene modified wax powder, ceramic powder and silicon nitride powder are mixed and then degassed to obtain component A.

[0031] The present invention preferably involves mixing aromatic epoxy resin, allyl bisphenol A epoxy resin, polymerization inhibitor, coupling agent and styrene to obtain a mixture.

[0032] In this invention, the mixing is preferably carried out in a high-speed disperser; the mixing speed is preferably 300-500 rpm; and the mixing time is preferably 4-6 minutes, more preferably 5 minutes. This invention does not have a specific limitation on the model of the high-speed disperser; any instrument or equipment well-known to those skilled in the art can be used.

[0033] After obtaining the mixture, the present invention preferably mixes the mixture, fumed silica, polytetrafluoroethylene modified wax powder, ceramic powder and silicon nitride powder, and then degassing to obtain component A.

[0034] In this invention, the mixing of the mixture, fumed silica, polytetrafluoroethylene modified wax powder, ceramic powder and silicon nitride powder is preferably carried out by first adding fumed silica and polytetrafluoroethylene modified wax powder to the mixture, and then adding ceramic powder and silicon nitride powder.

[0035] In this invention, the addition of fumed silica and polytetrafluoroethylene modified wax powder is preferably carried out under stirring conditions; the stirring speed is preferably 300~500 rpm; and the stirring time is preferably 5~10 min.

[0036] In this invention, the ceramic powder and silicon nitride powder are preferably dispersed under high-speed conditions; the high-speed dispersion speed is preferably 800~1500 rpm; and the high-speed dispersion time is preferably 15~20 min.

[0037] In this invention, the degassing is preferably carried out under vacuum conditions; the vacuum degree of the degassing is preferably 0.08~0.1MPa; and the degassing time is preferably 5~10min.

[0038] In this invention, the raw materials for preparing the high-hardness, ultra-wear-resistant coating include component B. In this invention, component B is a curing agent.

[0039] In this invention, the raw materials for preparing component B include 60-85 parts by mass of phenolic amine. As one embodiment, the mass fraction of the phenolic amine can be 65, 70, 75, 75.7, 76, or 80 parts.

[0040] In this invention, the preferred method for preparing the phenolic amine is to mix phenol, paraformaldehyde, and aromatic amine, and then perform a polymerization reaction to obtain the phenolic amine.

[0041] In this invention, the aromatic amine is preferably at least one of m-phenylenediamine, p-phenylenediamine, p-phenylenediamine, diaminodiphenylmethane, and diaminodiphenyl ether.

[0042] In this invention, the preferred molar ratio of phenol, paraformaldehyde, and aromatic amine is 1:(0.9~1.1):(0.9~1.2). As one embodiment, the molar ratio of phenol, paraformaldehyde, and aromatic amine may be 1:1:(1~1.1).

[0043] The present invention does not have any special limitations on the operation of mixing phenol, paraformaldehyde and aromatic amine, and any technical solution for preparing the mixture well known to those skilled in the art can be used.

[0044] In this invention, the polymerization reaction temperature is preferably 80~120℃; the polymerization reaction time is preferably 2~4h. As one embodiment, the polymerization reaction temperature can be 90℃, 100℃, or 110℃; the polymerization reaction time can be 3h.

[0045] In this invention, the active hydrogen equivalent of the phenolic amine is preferably 80-100 g / mol. As one embodiment, the active hydrogen equivalent of the phenolic amine can be 86.5 g / mol.

[0046] In this invention, the phenolic amine adopts a benzene ring rigid structure, which can further improve hardness and wear resistance.

[0047] The raw materials for preparing component B, based on 60-85 parts by weight of phenolic amine, also include 10-30 parts of polyether amine; preferably, the polyether amine is at least one of polyether amine D230, polyether amine D400, and polyether amine D2000. As one embodiment, the mass fraction of the polyether amine can be 12 parts, 14.5 parts, 15 parts, 18 parts, 18.7 parts, 19 parts, 20 parts, 22 parts, 25 parts, 26 parts, 27 parts, or 28 parts.

[0048] The raw materials for preparing component B, based on a phenolic amine mass fraction of 60-85 parts, also include 0.1-1 parts of an organic peroxide; preferably, the organic peroxide is at least one of benzoyl peroxide, tert-butyl hydroperoxide, and dibutyl cyclohexanone peroxide. As one embodiment, the organic peroxide mass fraction can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, or 0.9 parts. In this invention, the internal peroxide bonds in the organic peroxide can interact with the organic amine to form hydrogen-bonded complexes. The formation of these hydrogen-bonded complexes affects the electron cloud density of the -OO- bond, promoting the decomposition of the peroxide bond and achieving carbon-carbon double bond free radical copolymerization at room temperature, ultimately resulting in the formation of a dual-system intermodal network.

[0049] The raw materials for preparing component B, based on a phenolic amine mass fraction of 60-85 parts, also include 3-10 parts of benzyl alcohol. As one embodiment, the mass fraction of benzyl alcohol can be 4, 5, 6, 7, 8, or 9 parts. In this invention, benzyl alcohol is used as a solvent.

[0050] In this invention, the preferred method for preparing component B is as follows: Organic peroxides and benzyl alcohol are mixed to obtain an organic peroxide-benzyl alcohol solution; Phenolic amine and polyether amine were mixed, and then an organic peroxide-benzyl alcohol solution was added dropwise to obtain component B.

[0051] The present invention preferably involves mixing organic peroxides and benzyl alcohol to obtain an organic peroxide-benzyl alcohol solution.

[0052] The present invention does not have any special limitations on the operation of mixing the organic peroxide and benzyl alcohol; any technical solution for preparing the mixture well known to those skilled in the art can be used.

[0053] After obtaining the organic peroxide-benzyl alcohol solution, the present invention preferably mixes phenolic amine and polyether amine, and then adds the organic peroxide-benzyl alcohol solution dropwise to obtain component B.

[0054] In this invention, the mixing of the phenolic amine and the polyether amine is preferably carried out under stirring conditions; the stirring speed is preferably 300-500 rpm; and the stirring time is preferably 15-20 min. As one embodiment, the stirring speed can be 400 rpm; and the stirring time can be 16 min or 18 min.

[0055] This invention does not impose any particular limitation on the dripping rate; any operation familiar to those skilled in the art can be used. In this invention, hydrogen bonds will form in the reaction system. Dropping ensures the uniform distribution of the amine curing agent and organic peroxide as much as possible, while direct pouring may lead to the risk of clumping.

[0056] In this invention, the dripping is preferably carried out under stirring conditions; the stirring speed is preferably 300-500 rpm. This invention does not have a specific limitation on the stirring time; the dripping can be completed directly.

[0057] After the addition is complete, the present invention preferably continues stirring; the stirring speed is preferably 300~500 rpm; the stirring time is preferably 5~10 min. As one embodiment, the stirring speed can be 400 rpm; the stirring time can be 6 min or 8 min.

[0058] In this invention, the molar ratio of epoxy groups in component A to active hydrogen in component B is preferably 1:1.

[0059] This invention lowers the free radical decomposition temperature of organic peroxides through modification, enabling rapid copolymerization of carbon-carbon double bonds at room temperature. This, combined with the main aromatic epoxy-organic amine resin system, forms a rigid resin interpenetrating network structure, giving the coating excellent rigidity and cohesive strength, exhibiting extremely high hardness and wear resistance. With the addition of wear-resistant organic / inorganic fillers such as ceramic powder, silicon nitride powder, and polytetrafluoroethylene modified wax powder, the coating achieves a pencil hardness of 7H and a Tiber abrasion index of 4.6 mg / 1000r (H-10 grinding wheel, 1 kg load) after 7 days of room temperature curing, which is more than 90% lower than that of ordinary wear-resistant coatings.

[0060] This invention uses a compound of phenolic amine (polyphenyl ring) and polyether amine, which makes the coating maintain high hardness and ultra-wear resistance while still having good high-temperature toughness. The coating also has excellent chemical corrosion resistance. The product has a wide range of applications and is easy to apply. It is especially suitable for use in high-wear fields such as petrochemical pipelines, sewage pipelines and air ducts.

[0061] The present invention also provides a coating, the composition of which is the high-hardness ultra-wear-resistant coating described in the above technical solution.

[0062] The present invention also provides the application of the high-hardness ultra-wear-resistant coating or the coating described in the above technical solution in petrochemical pipelines, sewage pipelines and air ducts.

[0063] The present invention does not impose any special limitations on the application method of the high-hardness ultra-wear-resistant coating; it can be cured at room temperature.

[0064] The technical solutions of this invention will be clearly and completely described below with reference to the embodiments thereof. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0065] The preparation methods of phenolic amines used in the examples and comparative examples are as follows: Take 1 mol of phenol, add 1 mol of m-phenylenediamine, stir at 300 rpm and heat to 80°C to form a homogeneous phase, add 1 mol of paraformaldehyde in three portions (1 / 3 each time) at 20 min intervals, continue to maintain the temperature for polymerization reaction for 30 min, heat to 120°C and reflux for polymerization reaction for 3 hours, remove water under reduced pressure to obtain phenolic amine with an active hydrogen equivalent of 86.5 g / mol.

[0066] Example 1 A high-hardness, ultra-wear-resistant coating is composed of component A and component B; Component A is prepared from the following parts by weight of raw materials: 32 parts of EBA-65 naphthalene-type epoxy resin 13 parts of allyl bisphenol A epoxy resin 5 parts styrene 30 parts of ceramic powder, with a particle size of 45μm; 15 parts of silicon nitride powder with a particle size of 45 μm; 3.15 parts of polytetrafluoroethylene modified wax powder with a particle size of 10 μm; 1 part of KH-560 silane coupling agent 0.8 parts of fumed silica with a particle size of 30 nm; And 0.05 parts of p-benzoquinone; Component B is prepared from the following raw materials in parts by weight: 80 parts of phenolic amine Polyetheramine D230 14.5 parts, 0.5 parts of tert-butyl hydroperoxide 5 parts of benzyl alcohol; The preparation method of component A is as follows: EBA-65 naphthalene-type epoxy resin and allyl bisphenol A epoxy resin are poured into a high-speed disperser, then p-benzoquinone, KH-560 silane coupling agent and styrene are added, and the mixture is dispersed at 500 rpm for 5 min and stirred thoroughly. Then, fumed silica and polytetrafluoroethylene modified wax powder are added, and the mixture is dispersed at 500 rpm for 10 min. Next, ceramic powder and silicon nitride powder are added, and the mixture is dispersed at 1200 rpm for 20 min. A sample is taken and coated on a scraper to confirm that the powder is evenly dispersed. A vacuum of 0.09 MPa is turned on and the mixture is degassed for 8 min to obtain component A with an epoxy equivalent of 375.5 g / mol. The preparation method of component B is as follows: tert-butyl hydrogen peroxide is dissolved in benzyl alcohol to obtain an organic peroxide-benzyl alcohol solution; then phenolic amine and polyether amine D230 are weighed into a container, a high-speed disperser is turned on, and the mixture is dispersed at 300 rpm for 15 min with continuous stirring, and the organic peroxide-benzyl alcohol solution is slowly added dropwise. After the addition is completely completed, stirring is continued for 10 min to obtain component B with an active hydrogen equivalent of 87.1 g / mol. The molar ratio of epoxy groups in component A to active hydrogen in component B is 1:1. Component A and component B are mixed at a mass ratio of 4.3:1 to obtain a high-hardness, ultra-wear-resistant coating.

[0067] Example 2 A high-hardness, ultra-wear-resistant coating is composed of component A and component B; Component A is prepared from the following parts by weight of raw materials: 40 parts of EBA-65 naphthalene-type epoxy resin 7 parts of allyl bisphenol A epoxy resin 3 parts styrene 25 parts of ceramic powder, with a particle size of 45μm; 20 parts of silicon nitride powder, with a particle size of 45 μm; 3.15 parts of polytetrafluoroethylene modified wax powder with a particle size of 10 μm; 1 part of KH-560 silane coupling agent 0.8 parts of fumed silica with a particle size of 30 nm; And 0.05 parts of p-benzoquinone; Component B is prepared from the following raw materials in parts by weight: 76 parts of phenolic amine, Polyetheramine D230 18.7 parts, 0.3 parts of tert-butyl hydroperoxide 5 parts of benzyl alcohol; The preparation method of component A is as follows: EBA-65 naphthalene-type epoxy resin and allyl bisphenol A epoxy resin are poured into a high-speed disperser, then p-benzoquinone, KH-560 silane coupling agent and styrene are added, and the mixture is dispersed at 500 rpm for 5 min and stirred thoroughly. Then, fumed silica and polytetrafluoroethylene modified wax powder are added, and the mixture is dispersed at 500 rpm for 10 min. Next, ceramic powder and silicon nitride powder are added, and the mixture is dispersed at 1200 rpm for 20 min. A vacuum of 0.09 MPa is turned on, and the mixture is degassed for 8 min to obtain component A with an epoxy equivalent of 332.8 g / mol. The preparation method of component B is as follows: tert-butyl hydrogen peroxide is dissolved in benzyl alcohol to obtain an organic peroxide-benzyl alcohol solution; then phenolic amine and polyether amine D230 are weighed into a container, a high-speed disperser is turned on, and the mixture is dispersed at 300 rpm for 15 min with continuous stirring, and the organic peroxide-benzyl alcohol solution is slowly added dropwise. After the addition is completely completed, stirring is continued for 10 min to obtain component B with an active hydrogen equivalent of 85.7 g / mol. The molar ratio of epoxy groups in component A to active hydrogen in component B is 1:1. Component A and component B are mixed at a mass ratio of 3.9:1 to obtain a high-hardness, ultra-wear-resistant coating.

[0068] Example 3 A high-hardness, ultra-wear-resistant coating is composed of component A and component B; Component A is prepared from the following parts by weight of raw materials: 42 parts of EBA-65 naphthalene-type epoxy resin 5 parts of allyl bisphenol A epoxy resin 3 parts styrene 20 parts of ceramic powder, with a particle size of 45μm; 25 parts of silicon nitride powder with a particle size of 45 μm; 3.15 parts of polytetrafluoroethylene modified wax powder with a particle size of 10 μm; 1 part of KH-560 silane coupling agent 0.8 parts of fumed silica with a particle size of 30 nm; And 0.05 parts of p-benzoquinone; Component B is prepared from the following raw materials in parts by weight: 75.7 parts of phenolic amines 19 parts of polyetheramine D230 0.3 parts of tert-butyl hydroperoxide 5 parts of benzyl alcohol; The preparation method of component A is as follows: EBA-65 naphthalene-type epoxy resin and allyl bisphenol A epoxy resin are poured into a high-speed disperser, then p-benzoquinone, KH-560 silane coupling agent and styrene are added, and the mixture is dispersed at 500 rpm for 5 min and stirred thoroughly. Then, fumed silica and polytetrafluoroethylene modified wax powder are added, and the mixture is stirred at 500 rpm for 10 min. Next, ceramic powder and silicon nitride powder are added, and the mixture is dispersed at 1200 rpm for 20 min. Then, a vacuum of 0.09 MPa is turned on and the mixture is degassed for 8 min to obtain component A with an epoxy equivalent of 325.4 g / mol. The preparation method of component B is as follows: tert-butyl hydrogen peroxide is dissolved in benzyl alcohol to obtain an organic peroxide-benzyl alcohol solution; then phenolic amine and polyether amine D230 are weighed into a container, a high-speed disperser is turned on, and the mixture is dispersed at 300 rpm for 15 min with continuous stirring, and the organic peroxide-benzyl alcohol solution is slowly added dropwise. After the addition is completely completed, stirring is continued for 10 min to obtain component B with an active hydrogen equivalent of 85.7 g / mol. The molar ratio of epoxy groups in component A to active hydrogen in component B is 1:1. Component A and component B are mixed at a mass ratio of 3.8:1 to obtain a high-hardness, ultra-wear-resistant coating.

[0069] Comparative Example 1 (without carbon-carbon double bond groups) A two-component coating consists of component A and component B; Component A is prepared from the following parts by weight of raw materials: 32 parts of EBA-65 naphthalene-type epoxy resin 13 parts of allyl bisphenol A epoxy resin 5 parts styrene 30 parts of ceramic powder, with a particle size of 45μm; 15 parts of silicon nitride powder with a particle size of 45 μm; 3.2 parts of polytetrafluoroethylene modified wax powder with a particle size of 10 μm; 1 part of KH-560 silane coupling agent 0.8 parts of fumed silica with a particle size of 30 nm; Component B is prepared from the following raw materials in parts by weight: 70 parts of phenolic amine, 25 parts of polyetheramine D400 5 parts of benzyl alcohol; The preparation method of component A is as follows: EBA-65 naphthalene-type epoxy resin and allyl bisphenol A epoxy resin are poured into a high-speed disperser, then KH-560 silane coupling agent and styrene are added, and the mixture is dispersed at 500 rpm for 5 min and stirred thoroughly. Then, fumed silica and polytetrafluoroethylene modified wax powder are added, and the mixture is dispersed at 500 rpm for 10 min. Next, ceramic powder and silicon nitride powder are added, and the mixture is dispersed at 1200 rpm for 20 min. A sample is taken and coated on a scraper to confirm that the powder is evenly dispersed. A vacuum of 0.09 MPa is turned on, and the mixture is degassed for 8 min to obtain component A with an epoxy equivalent of 375.5 g / mol. The preparation method of component B is as follows: weigh phenolic amine curing agent, polyether amine D400 and benzyl alcohol into a container, turn on the high-speed disperser, disperse at 300 rpm for 20 min to obtain component B with an active hydrogen equivalent of 97.4 g / mol. Component A and component B are mixed at a mass ratio of 4.3:1 to obtain a two-component coating.

[0070] The coatings prepared in Examples 1-3 and Comparative Example 1 were applied to a standard iron plate and cured at room temperature for 7 days to obtain a complete coating. The hardness of the coating was tested according to the method of GB / T 6739 "Determination of Hardness of Paint Film by Pencil Method of Color Odor and Varnish".

[0071] Table 1 shows the hardness of the coatings prepared using the coatings from Examples 1-3 and Comparative Example 1.

[0072] Abrasion resistance test: The coatings prepared in Examples 1-3 and Comparative Example 1 were poured into a disc with a thickness of 6 mm, a diameter of 100 mm, and a 6.5 mm diameter hole in the center. After curing at room temperature for 7 days, the abrasion resistance was determined according to the standard test method of the Taber abrasion tester in accordance with ASTM 4060. The test grinding wheel used was an H-10 grinding wheel with a load of 1 kg and a speed of 1000 r.

[0073] Table 2 shows the wear resistance data of disks prepared using the coatings from Examples 1-3 and Comparative Example 1.

[0074] As can be seen from Tables 1 and 2, the coating of the present invention has significant advantages in hardness and wear resistance. Compared with Comparative Example 1, its hardness reaches 7H and the Tiber wear index is reduced by more than 90%, to only 4.6 mg / 1000 r.

[0075] As can be seen from the above embodiments and comparative examples, the coating prepared by the coating provided by the present invention has high hardness and ultra-wear resistance.

[0076] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A high-hardness, ultra-wear-resistant coating, comprising component A and component B; Component A is prepared from raw materials comprising the following parts by mass: 30-45 parts of aromatic epoxy resin, 5-15 parts of allyl bisphenol A epoxy resin 3-5 parts styrene 20-40 parts ceramic powder 10-30 parts of silicon nitride powder 3-5 parts of polytetrafluoroethylene modified wax powder, 0.3 to 1 part of coupling agent, And 0.01~0.1 parts of polymerization inhibitor; Component B is prepared from raw materials comprising the following parts by mass: 60-85 parts of phenolic amine 10-30 parts of polyetheramine, 0.1 to 1 part of organic peroxide, 3-10 parts of benzyl alcohol; The aromatic epoxy resin is at least one of phenolic epoxy resin, o-cresol epoxy resin, resorcinol-type epoxy resin and naphthalene-type epoxy resin. The method for preparing the phenolic amine is as follows: phenol, paraformaldehyde and aromatic amine are mixed and subjected to a polymerization reaction to obtain phenolic amine; The aromatic amine is at least one of m-phenylenediamine, p-phenylenediamine, p-phenylenediamine, diaminodiphenylmethane, and diaminodiphenyl ether.

2. The high-hardness, ultra-wear-resistant coating according to claim 1, characterized in that, The coupling agent is at least one of silane coupling agents, titanate coupling agents, and aluminate coupling agents.

3. The high-hardness, ultra-wear-resistant coating according to claim 1, characterized in that, The polymerization inhibitor is at least one selected from p-benzoquinone, o-sec-butyl-4,6-dinitrophenol, and 2,6-di-tert-butyl-4-methylpyridine.

4. The high-hardness, ultra-wear-resistant coating according to claim 1, characterized in that, The polyetheramine is at least one of polyetheramine D230, polyetheramine D400 and polyetheramine D2000.

5. The high-hardness, ultra-wear-resistant coating according to claim 1, characterized in that, The organic peroxide is at least one of benzoyl peroxide and tert-butyl hydroperoxide.

6. A coating, wherein the coating is composed of the high-hardness, ultra-wear-resistant coating as described in any one of claims 1 to 5.

7. The application of the high-hardness ultra-wear-resistant coating according to any one of claims 1 to 5 or the coating according to claim 6 in petrochemical pipelines, sewage pipelines and air ducts.

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