CN111808500A - Anticorrosive paint based on water-based epoxy resin and preparation process thereof - Google Patents
Anticorrosive paint based on water-based epoxy resin and preparation process thereof Download PDFInfo
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- CN111808500A CN111808500A CN202010686394.6A CN202010686394A CN111808500A CN 111808500 A CN111808500 A CN 111808500A CN 202010686394 A CN202010686394 A CN 202010686394A CN 111808500 A CN111808500 A CN 111808500A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/16—Preparation of ethers by reaction of esters of mineral or organic acids with hydroxy or O-metal groups
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D249/00—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms
- C07D249/16—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms condensed with carbocyclic rings or ring systems
- C07D249/18—Benzotriazoles
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/017—Additives being an antistatic agent
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Abstract
The invention discloses an anticorrosive paint based on water-based epoxy resin and a preparation process thereof, wherein the anticorrosive paint is prepared from the following raw materials in parts by weight: 100-150 parts of water-based epoxy resin emulsion, 1-1.5 parts of modified antistatic agent, 4-6 parts of modified corrosion-resistant agent, 5-15 parts of talcum powder, 5-15 parts of kaolin powder, 0.5-1 part of defoaming agent and 30-50 parts of deionized water; and when the modified antistatic agent is mixed with the waterborne epoxy resin, an ether bond on the molecules of the modified antistatic agent and hydroxyl in the molecules of the waterborne epoxy resin form a hydrogen bond, so that the compatibility of the modified antistatic agent and the waterborne epoxy resin is greatly improved, and the modified corrosion-resistant agent enables the anticorrosive coating to be capable of resisting corrosion to various chemical substances and has a better anticorrosive effect.
Description
Technical Field
The invention belongs to the technical field of paint preparation, and particularly relates to an anticorrosive paint based on water-based epoxy resin and a preparation process thereof.
Background
As one of the three general thermosetting resins, epoxy resin is widely applied to the fields of mechano-electronics, aerospace, transportation, construction and the like due to its excellent technological properties, mechanical properties and physical properties, and epoxy resin usually uses a large amount of organic solvent during application, which increases the cost on one hand, and on the other hand, because the volatilization of organic solvent causes environmental pollution and harm to human health, the application of solvent epoxy resin is more and more limited, and even is forbidden by developed countries.
Along with the development of industry, the application of anticorrosive coatings is more and more extensive, in foreign countries, the waterborne epoxy resin anticorrosive coatings become one of the fastest-developing waterborne anticorrosive coatings, static electricity can appear due to the influence of the environment in the use process of the traditional waterborne epoxy resin-based anticorrosive coatings, fire disasters can be caused due to the appearance of the static electricity, an antistatic agent can be added into part of the anticorrosive coatings in the preparation process, the traditional antistatic agent can be separated from a coating after the coatings are used for a long time, and further the coating does not have antistatic property, the traditional anticorrosive coatings are single in anticorrosive effect, and when the coatings are corroded for a long time, the surface of the coating can be foamed and fall off, and further the anticorrosive effect cannot be achieved.
Disclosure of Invention
The invention aims to provide an anticorrosive paint based on water-based epoxy resin and a preparation process thereof.
The technical problems to be solved by the invention are as follows:
traditional anticorrosive coating can appear static because of the influence of environment in the use, the emergence of static can lead to the emergence of conflagration, antistatic agent can be added to some anticorrosive coating in the preparation process, traditional antistatic agent can take place the separation with filming after coating uses for a long time, and then the film that makes does not have antistatic properties, traditional anticorrosive coating's anticorrosive effect is single, and when receiving the corruption for a long time, the phenomenon that the foaming drops can appear on filming surface, and then can't reach anticorrosive efficiency.
The purpose of the invention can be realized by the following technical scheme:
an anticorrosive paint based on water-based epoxy resin is prepared from the following raw materials in parts by weight: 100-150 parts of water-based epoxy resin emulsion, 1-1.5 parts of modified antistatic agent, 4-6 parts of modified corrosion-resistant agent, 5-15 parts of talcum powder, 5-15 parts of kaolin powder, 0.5-1 part of defoaming agent and 30-50 parts of deionized water;
the anticorrosive paint is prepared by the following steps:
step S1: adding talcum powder and kaolin powder into a pulverizer, pulverizing, sieving with a 300-mesh and 500-mesh sieve, and mixing to obtain mixed powder;
step S2: adding the aqueous epoxy resin emulsion into a stirring kettle, stirring for 5-10min at the rotation speed of 300-500r/min and the temperature of 30-50 ℃, adding the modified antistatic agent and the modified corrosion resistant agent, and continuously stirring for 30-40min at the temperature of 60-80 ℃ to prepare a premixed liquid;
step S3: and (4) adding the premixed liquid prepared in the step S2, the mixed powder prepared in the step S1, a defoaming agent and deionized water into a stirring kettle, and stirring for 1-1.5 hours at the rotating speed of 1000-1500r/min and the temperature of 25-30 ℃ to prepare the anticorrosive coating.
Further, the defoaming agent is one or two of polydimethylsiloxane and ethylene glycol siloxane which are mixed in any proportion.
Further, the modified antistatic agent is prepared by the following steps:
step A1: adding phenol into a reaction kettle, stirring and adding acetone under the condition that the rotation speed is 300-500r/min until the phenol is completely dissolved, continuously stirring and dropwise adding a concentrated sulfuric acid solution under the condition that the temperature is 10-15 ℃, reacting for 2-3h under the condition that the temperature is 18-20 ℃, and then continuously stirring for 30-40min under the condition that the temperature is 2-5 ℃ to prepare an intermediate F1;
the reaction process is as follows:
step A2: adding the intermediate F1 prepared in the step A1 and liquid bromine into a reaction kettle, reacting for 30-40min under the condition of illumination, adding benzene and anhydrous aluminum chloride, and reacting for 1-2h at the temperature of 60-70 ℃ to prepare an intermediate F2;
the reaction process is as follows:
step A3: adding the intermediate F2 prepared in the step A2 and methanol into a fixed bed reactor, reacting for 3-5h under the conditions that the pressure is 0.2-0.5MPa and the temperature is 450-500 ℃ to prepare an intermediate F3, adding the intermediate F3 and an acetone solution into a reaction kettle, stirring at the rotation speed of 300-500r/min and the temperature of 25-30 ℃ until the intermediate F3 is completely dissolved, dropwise adding liquid bromine, adding hydrogen peroxide after dropwise adding, reacting for 10-15min, and performing reflux reaction for 2-2.5h under the temperature of 80-90 ℃ to prepare an intermediate F4;
the reaction process is as follows:
step A4: adding the intermediate F4 prepared in the step A3 and deionized water into a stirring kettle, stirring until the intermediate F4 is completely dissolved under the condition that the rotation speed is 300-500r/min, adding potassium permanganate, performing reflux reaction for 4-5h under the condition that the temperature is 110-120 ℃ to prepare an intermediate F5, adding the intermediate F5 and copper oxide into an oxidation tower, introducing air and water vapor under the condition that the temperature is 200-210 ℃, and reacting for 3-5h to prepare an intermediate F6;
the reaction process is as follows:
step A5: and B, adding the intermediate F6 prepared in the step A4 and a sodium hydroxide solution into a reaction kettle, stirring for 15-20min at the rotation speed of 100-200r/min and the temperature of 15-20 ℃, adding dimethyl sulfate, stirring for 10-15min at the temperature of 40-45 ℃, and performing reflux reaction for 8-10h at the temperature of 120-150 ℃ to prepare the antistatic agent.
The reaction process is as follows:
further, the dosage of the phenol, acetone and concentrated sulfuric acid solution in the step A1 is more than 5 g: 2mL of: 3mL, the mass fraction of the concentrated sulfuric acid solution is 75-80%, and the dosage ratio of the intermediate F1, the liquid bromine, the benzene and the anhydrous aluminum chloride in the step A2 is 10 g: 3mL of: 5mL of: 0.5g of intermediate F2 and methanol according to step A3 in a ratio of 5 g: 2mL, wherein the dosage ratio of the intermediate F3, the acetone liquid bromine and the hydrogen peroxide is 5 g: 3mL of: 10mL, wherein the dosage ratio of the intermediate F4, the deionized water and the potassium permanganate in the step A4 is 5 g: 30mL of: 2g, the mass ratio of the intermediate F5 to the copper oxide is 15: 1, the dosage ratio of the intermediate F6, the sodium hydroxide solution and the dimethyl sulfate in the step A5 is 2 g: 6mL of: 3mL, and the mass fraction of the sodium hydroxide solution is 10-15%.
Further, the modified corrosion-resistant agent is prepared by the following steps:
step B1: adding acetanilide and methyl ether into a reaction kettle, stirring until the acetanilide is completely dissolved, dropwise adding first mixed acid at the temperature of 40-50 ℃, reacting for 2-3h at the temperature of 55-65 ℃ after dropwise adding is finished to obtain an intermediate E1, adding the intermediate E1, liquid bromine and ferric bromide into the reaction kettle, and reacting for 30-40min at the temperature of 35-40 ℃ to obtain an intermediate E2;
the reaction process is as follows:
step B2: adding the intermediate E2 prepared in the step B1 and acetic acid into a reaction kettle, stirring and dropwise adding a second mixed acid under the conditions that the rotating speed is 300-500r/min and the temperature is 0-2 ℃, and reacting for 1-1.5h under the condition that the temperature is 3-5 ℃ after dropwise adding is finished to prepare an intermediate E3;
the reaction process is as follows:
step B3: and B2, adding the intermediate E3 and the sodium sulfide solution into a reaction kettle, reacting for 3-4h at the rotation speed of 200-300r/min and the temperature of 120-130 ℃ to obtain an intermediate E4, adding the intermediate E4 and acetic acid into the reaction kettle, stirring until the intermediate E4 is completely dissolved, adding the sodium nitrite aqueous solution at the temperature of 1-5 ℃, continuously stirring until the mixture is uniformly mixed, and reacting for 3-4h at the temperature of 80-85 ℃ to obtain the modified corrosion inhibitor.
The reaction process is as follows:
further, the dosage ratio of the acetanilide, the methyl ether and the first mixed acid in the step B1 is 5 g: 1mL of: 5mL, wherein the dosage ratio of the intermediate E1, the liquid bromine and the ferric bromide is 10 g: 2mL of: 1g, the dosage ratio of the intermediate E2, the acetic acid and the second mixed acid in the step B2 is 5 g: 5mL of: 4mL, the ratio of the intermediate E3 and the sodium sulfide solution in step B3 was 2 g: 1mL, intermediate E4, acetic acid, aqueous sodium nitrite 5 g: 1mL of: 5.5 g.
Further, the first mixed acid in the step B1 is mixed with a mixed acid in a volume ratio of 4: 5, mixing concentrated nitric acid and concentrated sulfuric acid, wherein the mass fraction of the concentrated nitric acid is 75-80%, the mass fraction of the concentrated sulfuric acid is 75-80%, and the volume ratio of the second mixed acid in the step B2 is 11: 7, mixing concentrated nitric acid and concentrated sulfuric acid, wherein the mass fraction of the concentrated nitric acid is 70-80%, the mass fraction of the concentrated sulfuric acid is 70-80%, and the mass fraction of the sodium nitrite aqueous solution in the step B3 is 40-45%.
The invention has the beneficial effects that: the invention prepares a modified antistatic agent in the process of preparing an anticorrosive coating based on water-based epoxy resin, the modified antistatic agent is a nonionic antistatic agent, when the water-based epoxy resin is mixed, molecules of the modified antistatic agent form the densest orientation arrangement on the interface of the resin, the hydrophobic group bromine atoms in the molecules extend to the hydrophilic group hydroxyl groups in the resin and extend to the outside of the resin, after the coating is coated, the hydrophilic groups on the molecules of the modified antistatic agent are all arranged towards the air side to form a monomolecular conducting layer, so that the anticorrosive coating has good antistatic property, when the water-based epoxy resin is prepared, the hydrophilic groups are introduced on the epoxy resin, the hydroxyl groups are good hydrophilic groups, when the modified antistatic agent is mixed with the water-based epoxy resin, ether bonds on the molecules of the modified antistatic agent and the hydroxyl groups in the molecules of the water-based epoxy resin form hydrogen bonds, greatly improves the compatibility of the modified antistatic agent and the water-based epoxy resin, ensures that the coating still has good antistatic property after being used for a long time, and prepares a modified corrosion-resistant agent in the process of preparing the anticorrosive coating, wherein the molecules of the modified corrosion-resistant agent contain polar groups and nonpolar groups, the polar groups contain nitrogen elements, the nitrogen elements contain arc pair electrons and have large electronegativity, when the anticorrosive coating is coated on the metal surface, the molecules of the modified corrosion-resistant agent are adsorbed on the metal surface through the polar groups, the nonpolar groups are arranged in a corrosive medium, so that the metal is isolated from the corrosive medium, the diffusion of a corrosion reaction product is hindered, meanwhile, the double electric layer structure is changed, the activation energy of the corrosion reaction is improved, and further the corrosion of the metal is inhibited, the molecules of the modified corrosion-resistant agent contain hydrophobic group bromine elements and hydrophilic group amino groups, and amino groups are adsorbed on the metal surface, a layer of compact hydrophobic film is formed on the surface of the metal, so that the surface of the metal is protected from water corrosion.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
An anticorrosive paint based on water-based epoxy resin is prepared from the following raw materials in parts by weight: 100 parts of water-based epoxy resin emulsion, 1 part of modified antistatic agent, 4 parts of modified corrosion-resistant agent, 5 parts of talcum powder, 5 parts of kaolin powder, 0.5 part of polydimethylsiloxane and 30 parts of deionized water;
the anticorrosive paint is prepared by the following steps:
step S1: adding talcum powder and kaolin powder into a grinder, grinding, sieving by a 300-mesh sieve, and mixing to obtain mixed powder;
step S2: adding the water-based epoxy resin emulsion into a stirring kettle, stirring for 5min at the rotation speed of 300r/min and the temperature of 30 ℃, adding the modified antistatic agent and the modified corrosion-resistant agent, and continuously stirring for 30min at the temperature of 60 ℃ to prepare a premixed solution;
step S3: and (4) adding the premixed liquid prepared in the step S2, the mixed powder prepared in the step S1, polydimethylsiloxane and deionized water into a stirring kettle, and stirring for 1h at the rotation speed of 1000r/min and the temperature of 25 ℃ to prepare the anticorrosive paint.
When in use, the volume ratio of the anticorrosive paint to the curing agent ethylenediamine is 2: 1 and mixing.
The modified antistatic agent is prepared by the following steps:
step A1: adding phenol into a reaction kettle, stirring and adding acetone under the condition that the rotating speed is 300r/min until the phenol is completely dissolved, continuously stirring and dropwise adding a concentrated sulfuric acid solution under the condition that the temperature is 10 ℃, reacting for 2 hours under the condition that the temperature is 18 ℃, and continuously stirring for 30 minutes under the condition that the temperature is 2 ℃ to prepare an intermediate F1;
step A2: adding the intermediate F1 prepared in the step A1 and liquid bromine into a reaction kettle, reacting for 30min under the condition of illumination, adding benzene and anhydrous aluminum chloride, and reacting for 1h at the temperature of 60 ℃ to prepare an intermediate F2;
step A3: adding the intermediate F2 prepared in the step A2 and methanol into a fixed bed reactor, reacting for 3 hours under the conditions that the pressure is 0.2MPa and the temperature is 450 ℃ to prepare an intermediate F3, adding the intermediate F3 and an acetone solution into a reaction kettle, stirring until the intermediate F3 is completely dissolved at the rotation speed of 300r/min and the temperature of 25 ℃, dropwise adding liquid bromine, adding hydrogen peroxide after dropwise adding, reacting for 10 minutes, and performing reflux reaction for 2 hours under the condition that the temperature is 80 ℃ to prepare an intermediate F4;
step A4: adding the intermediate F4 prepared in the step A3 and deionized water into a stirring kettle, stirring until the intermediate F4 is completely dissolved under the condition that the rotating speed is 300r/min, adding potassium permanganate, performing reflux reaction for 4 hours under the condition that the temperature is 110 ℃ to prepare an intermediate F5, adding the intermediate F5 and copper oxide into an oxidation tower, introducing air and water vapor under the condition that the temperature is 200 ℃, and reacting for 3-5 hours to prepare an intermediate F6;
step A5: and D, adding the intermediate F6 prepared in the step A4 and a sodium hydroxide solution into a reaction kettle, stirring for 15min and adding dimethyl sulfate under the conditions that the rotating speed is 100r/min and the temperature is 15 ℃, stirring for 10min under the condition that the temperature is 40 ℃, and performing reflux reaction for 8h under the condition that the temperature is 120 ℃ to prepare the modified antistatic agent.
The modified corrosion-resistant agent is prepared by the following steps:
step B1: adding acetanilide and methyl ether into a reaction kettle, stirring until the acetanilide is completely dissolved, dropwise adding first mixed acid at the temperature of 40 ℃, reacting for 2 hours at the temperature of 55 ℃ after dropwise adding is finished to obtain an intermediate E1, adding the intermediate E1, liquid bromine and ferric bromide into the reaction kettle, and reacting for 30-40 minutes at the temperature of 35 ℃ to obtain an intermediate E2;
step B2: adding the intermediate E2 prepared in the step B1 and acetic acid into a reaction kettle, stirring and dropwise adding a second mixed acid under the conditions that the rotation speed is 300r/min and the temperature is 0 ℃, and reacting for 1h under the condition that the temperature is 3 ℃ after dropwise adding is finished to prepare an intermediate E3;
step B3: and B2, adding the intermediate E3 and the sodium sulfide solution prepared in the step B2 into a reaction kettle, reacting for 3 hours at the rotation speed of 200r/min and the temperature of 120 ℃ to prepare an intermediate E4, adding the intermediate E4 and acetic acid into the reaction kettle, stirring until the intermediate E4 is completely dissolved, adding the sodium nitrite aqueous solution at the temperature of 1 ℃, continuously stirring until the mixture is uniformly mixed, and reacting for 3 hours at the temperature of 80 ℃ to prepare the modified corrosion inhibitor.
Example 2
An anticorrosive paint based on water-based epoxy resin is prepared from the following raw materials in parts by weight: 130 parts of waterborne epoxy resin emulsion, 1.2 parts of modified antistatic agent, 5 parts of modified corrosion-resistant agent, 10 parts of talcum powder, 10 parts of kaolin powder, 0.8 part of polydimethylsiloxane and 40 parts of deionized water;
the anticorrosive paint is prepared by the following steps:
step S1: adding talcum powder and kaolin powder into a grinder, grinding, sieving by a 400-mesh sieve, and mixing to obtain mixed powder;
step S2: adding the water-based epoxy resin emulsion into a stirring kettle, stirring for 8min at the rotation speed of 400r/min and the temperature of 40 ℃, adding the modified antistatic agent and the modified corrosion-resistant agent, and continuously stirring for 35min at the temperature of 70 ℃ to prepare a premixed solution;
step S3: and (4) adding the premixed liquid prepared in the step S2, the mixed powder prepared in the step S1, polydimethylsiloxane and deionized water into a stirring kettle, and stirring for 1.3 hours at the rotation speed of 1300r/min and the temperature of 28 ℃ to prepare the anticorrosive paint.
When in use, the volume ratio of the anticorrosive paint to the curing agent ethylenediamine is 2: 1 and mixing.
Example 3
An anticorrosive paint based on water-based epoxy resin is prepared from the following raw materials in parts by weight: 150 parts of water-based epoxy resin emulsion, 1.5 parts of modified antistatic agent, 6 parts of modified corrosion-resistant agent, 15 parts of talcum powder, 15 parts of kaolin powder, 1 part of polydimethylsiloxane and 50 parts of deionized water;
the anticorrosive paint is prepared by the following steps:
step S1: adding talcum powder and kaolin powder into a grinder, grinding, sieving by a 500-mesh sieve, and mixing to obtain mixed powder;
step S2: adding the aqueous epoxy resin emulsion into a stirring kettle, stirring for 10min at the rotation speed of 500r/min and the temperature of 50 ℃, adding the modified antistatic agent and the modified corrosion resistant agent, and continuously stirring for 40min at the temperature of 80 ℃ to prepare a premixed solution;
step S3: and (4) adding the premixed liquid prepared in the step S2, the mixed powder prepared in the step S1, polydimethylsiloxane and deionized water into a stirring kettle, and stirring for 1.5 hours at the rotation speed of 1500r/min and the temperature of 30 ℃ to prepare the anticorrosive paint.
When in use, the volume ratio of the anticorrosive paint to the curing agent ethylenediamine is 2: 1 and mixing.
Comparative example 1
Compared with the example 1, the comparative example does not add the modified antistatic agent and comprises the following specific steps:
step S1: adding talcum powder and kaolin powder into a grinder, grinding, sieving by a 300-mesh sieve, and mixing to obtain mixed powder;
step S2: adding the water-based epoxy resin emulsion into a stirring kettle, stirring for 5min at the rotation speed of 300r/min and the temperature of 30 ℃, adding the modified corrosion-resistant agent, and continuously stirring for 30min at the temperature of 60 ℃ to prepare a premixed solution;
step S3: and (4) adding the premixed liquid prepared in the step S2, the mixed powder prepared in the step S1, polydimethylsiloxane and deionized water into a stirring kettle, and stirring for 1h at the rotation speed of 1000r/min and the temperature of 25 ℃ to prepare the anticorrosive paint.
When in use, the volume ratio of the anticorrosive paint to the curing agent ethylenediamine is 2: 1 and mixing.
Comparative example 2
Compared with the embodiment 1, the comparative example does not add the modified corrosion-resistant agent, and comprises the following specific steps:
step S1: adding talcum powder and kaolin powder into a grinder, grinding, sieving by a 300-mesh sieve, and mixing to obtain mixed powder;
step S2: adding the water-based epoxy resin emulsion into a stirring kettle, stirring for 5min at the rotation speed of 300r/min and the temperature of 30 ℃, adding the modified antistatic agent, and continuously stirring for 30min at the temperature of 60 ℃ to prepare a premixed solution;
step S3: and (4) adding the premixed liquid prepared in the step S2, the mixed powder prepared in the step S1, polydimethylsiloxane and deionized water into a stirring kettle, and stirring for 1h at the rotation speed of 1000r/min and the temperature of 25 ℃ to prepare the anticorrosive paint.
When in use, the volume ratio of the anticorrosive paint to the curing agent ethylenediamine is 2: 1 and mixing.
Comparative example 3
Compared with the embodiment 1, the comparative example does not add the modified antistatic agent and the modified corrosion-resistant agent, and comprises the following specific steps:
step S1: adding talcum powder and kaolin powder into a grinder, grinding, sieving by a 300-mesh sieve, and mixing to obtain mixed powder;
step S2: adding the water-based epoxy resin emulsion into a stirring kettle, and stirring for 5min at the rotating speed of 300r/min and the temperature of 30 ℃ to prepare a premixed solution;
step S3: and (4) adding the premixed liquid prepared in the step S2, the mixed powder prepared in the step S1, polydimethylsiloxane and deionized water into a stirring kettle, and stirring for 1h at the rotation speed of 1000r/min and the temperature of 25 ℃ to prepare the anticorrosive paint.
When in use, the volume ratio of the anticorrosive paint to the curing agent ethylenediamine is 2: 1 and mixing.
Comparative example 4
The comparative example is a common anticorrosive paint on the market.
The anticorrosive coatings prepared in the above examples 1 to 3 and comparative examples 1 to 4 were subjected to performance tests, the test results of which are shown in table 1 below;
surface resistivity: the anticorrosive coatings prepared in examples 1-3 and comparative examples 1-4 were subjected to surface resistivity detection according to the standard of GB/T1410-2006, and the detection results were recorded.
Surface resistivity after use: the anticorrosive coatings prepared in examples 1 to 3 and comparative examples 1 to 4 were respectively coated on a tin plate having a specification of 50mm × 120mm × 0.3, and surface resistivity was measured after the tin plate was left in a dry environment for 100 days.
Acid resistance: the anticorrosive coatings prepared in examples 1 to 3 and comparative examples 1 to 4 were respectively coated on tin plates having a specification of 50mm × 120mm × 0.3, the tin plates were respectively immersed in a sulfuric acid aqueous solution having a mass fraction of 30% for 60, 90, and 120 days, and the state of the surface paint film was observed.
Alkali resistance: the anticorrosive coatings prepared in examples 1 to 3 and comparative examples 1 to 4 were respectively coated on a tin plate having a specification of 50mm × 120mm × 0.3, the tin plate was immersed in a 10% sodium hydroxide aqueous solution by mass for 60, 90, and 120 days, respectively, and the state of the surface paint film was observed.
Water resistance: the anticorrosive coatings prepared in examples 1 to 3 and comparative examples 1 to 4 were respectively coated on tin plates having a specification of 50mm × 120mm × 0.3, the tin plates were respectively immersed in distilled water for 60, 90, and 120 days, and the state of the surface paint film was observed.
As can be seen from Table 1 above, the anticorrosive coatings obtained in examples 1 to 3 and comparative example 2 had a surface resistivity of 107Omega, whereas the surface resistivity of the anticorrosive coatings prepared in comparative example 1 and comparative examples 3 to 4 was 109-1010Omega, the smaller the surface resistivity of the coating film, the better the antistatic property of the coating film, after the anticorrosive coating is coated and left for 100 days, the surface resistivity of the anticorrosive coatings prepared in examples 1-3 and comparative example 2 is not changed, the anticorrosive coating prepared by the invention on the surface still has good antistatic property after long-term use, and the surface of the coating film does not generate foaming or shedding phenomenon after being respectively soaked in sulfuric acid aqueous solution, sodium hydroxide aqueous solution and distilled water for 60, 90 and 120 days.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (8)
1. An anticorrosive paint based on water-based epoxy resin is characterized in that: the composition is prepared from the following raw materials in parts by weight: 100-150 parts of water-based epoxy resin emulsion, 1-1.5 parts of modified antistatic agent, 4-6 parts of modified corrosion-resistant agent, 5-15 parts of talcum powder, 5-15 parts of kaolin powder, 0.5-1 part of defoaming agent and 30-50 parts of deionized water;
the anticorrosive paint is prepared by the following steps:
step S1: adding talcum powder and kaolin powder into a pulverizer, pulverizing, sieving with a 300-mesh and 500-mesh sieve, and mixing to obtain mixed powder;
step S2: adding the aqueous epoxy resin emulsion into a stirring kettle, stirring for 5-10min at the rotation speed of 300-500r/min and the temperature of 30-50 ℃, adding the modified antistatic agent and the modified corrosion resistant agent, and continuously stirring for 30-40min at the temperature of 60-80 ℃ to prepare a premixed liquid;
step S3: and (4) adding the premixed liquid prepared in the step S2, the mixed powder prepared in the step S1, a defoaming agent and deionized water into a stirring kettle, and stirring for 1-1.5 hours at the rotating speed of 1000-1500r/min and the temperature of 25-30 ℃ to prepare the anticorrosive coating.
2. The anticorrosive paint based on the water-based epoxy resin as claimed in claim 1, wherein: the defoaming agent is one or two of polydimethylsiloxane and ethylene glycol siloxane which are mixed in any proportion.
3. The anticorrosive paint based on the water-based epoxy resin as claimed in claim 1, wherein: the modified antistatic agent is prepared by the following steps:
step A1: adding phenol into a reaction kettle, stirring and adding acetone under the condition that the rotation speed is 300-500r/min until the phenol is completely dissolved, continuously stirring and dropwise adding a concentrated sulfuric acid solution under the condition that the temperature is 10-15 ℃, reacting for 2-3h under the condition that the temperature is 18-20 ℃, and then continuously stirring for 30-40min under the condition that the temperature is 2-5 ℃ to prepare an intermediate F1;
step A2: adding the intermediate F1 prepared in the step A1 and liquid bromine into a reaction kettle, reacting for 30-40min under the condition of illumination, adding benzene and anhydrous aluminum chloride, and reacting for 1-2h at the temperature of 60-70 ℃ to prepare an intermediate F2;
step A3: adding the intermediate F2 prepared in the step A2 and methanol into a fixed bed reactor, reacting for 3-5h under the conditions that the pressure is 0.2-0.5MPa and the temperature is 450-500 ℃ to prepare an intermediate F3, adding the intermediate F3 and an acetone solution into a reaction kettle, stirring at the rotation speed of 300-500r/min and the temperature of 25-30 ℃ until the intermediate F3 is completely dissolved, dropwise adding liquid bromine, adding hydrogen peroxide after dropwise adding, reacting for 10-15min, and performing reflux reaction for 2-2.5h under the temperature of 80-90 ℃ to prepare an intermediate F4;
step A4: adding the intermediate F4 prepared in the step A3 and deionized water into a stirring kettle, stirring until the intermediate F4 is completely dissolved under the condition that the rotation speed is 300-500r/min, adding potassium permanganate, performing reflux reaction for 4-5h under the condition that the temperature is 110-120 ℃ to prepare an intermediate F5, adding the intermediate F5 and copper oxide into an oxidation tower, introducing air and water vapor under the condition that the temperature is 200-210 ℃, and reacting for 3-5h to prepare an intermediate F6;
step A5: and B, adding the intermediate F6 prepared in the step A4 and a sodium hydroxide solution into a reaction kettle, stirring for 15-20min at the rotation speed of 100-200r/min and the temperature of 15-20 ℃, adding dimethyl sulfate, stirring for 10-15min at the temperature of 40-45 ℃, and performing reflux reaction for 8-10h at the temperature of 120-150 ℃ to prepare the antistatic agent.
4. The anticorrosive paint based on the water-based epoxy resin as claimed in claim 3, wherein: the dosage ratio of the phenol, the acetone and the concentrated sulfuric acid solution in the step A1 is 5 g: 2mL of: 3mL, the mass fraction of the concentrated sulfuric acid solution is 75-80%, and the dosage ratio of the intermediate F1, the liquid bromine, the benzene and the anhydrous aluminum chloride in the step A2 is 10 g: 3mL of: 5mL of: 0.5g of intermediate F2 and methanol according to step A3 in a ratio of 5 g: 2mL, wherein the dosage ratio of the intermediate F3, the acetone liquid bromine and the hydrogen peroxide is 5 g: 3mL of: 10mL, wherein the dosage ratio of the intermediate F4, the deionized water and the potassium permanganate in the step A4 is 5 g: 30mL of: 2g, the mass ratio of the intermediate F5 to the copper oxide is 15: 1, the dosage ratio of the intermediate F6, the sodium hydroxide solution and the dimethyl sulfate in the step A5 is 2 g: 6mL of: 3mL, and the mass fraction of the sodium hydroxide solution is 10-15%.
5. The anticorrosive paint based on the water-based epoxy resin as claimed in claim 1, wherein: the modified corrosion-resistant agent is prepared by the following steps:
step B1: adding acetanilide and methyl ether into a reaction kettle, stirring until the acetanilide is completely dissolved, dropwise adding first mixed acid at the temperature of 40-50 ℃, reacting for 2-3h at the temperature of 55-65 ℃ after dropwise adding is finished to obtain an intermediate E1, adding the intermediate E1, liquid bromine and ferric bromide into the reaction kettle, and reacting for 30-40min at the temperature of 35-40 ℃ to obtain an intermediate E2;
step B2: adding the intermediate E2 prepared in the step B1 and acetic acid into a reaction kettle, stirring and dropwise adding a second mixed acid under the conditions that the rotating speed is 300-500r/min and the temperature is 0-2 ℃, and reacting for 1-1.5h under the condition that the temperature is 3-5 ℃ after dropwise adding is finished to prepare an intermediate E3;
step B3: and B2, adding the intermediate E3 and the sodium sulfide solution into a reaction kettle, reacting for 3-4h at the rotation speed of 200-300r/min and the temperature of 120-130 ℃ to obtain an intermediate E4, adding the intermediate E4 and acetic acid into the reaction kettle, stirring until the intermediate E4 is completely dissolved, adding the sodium nitrite aqueous solution at the temperature of 1-5 ℃, continuously stirring until the mixture is uniformly mixed, and reacting for 3-4h at the temperature of 80-85 ℃ to obtain the modified corrosion inhibitor.
6. The anticorrosive paint based on the water-based epoxy resin as claimed in claim 5, wherein: the dosage ratio of the acetanilide, the methyl ether and the first mixed acid in the step B1 is 5 g: 1mL of: 5mL, wherein the dosage ratio of the intermediate E1, the liquid bromine and the ferric bromide is 10 g: 2mL of: 1g, the dosage ratio of the intermediate E2, the acetic acid and the second mixed acid in the step B2 is 5 g: 5mL of: 4mL, the ratio of the intermediate E3 and the sodium sulfide solution in step B3 was 2 g: 1mL, intermediate E4, acetic acid, aqueous sodium nitrite 5 g: 1mL of: 5.5 g.
7. The anticorrosive paint based on the water-based epoxy resin as claimed in claim 5, wherein: the first mixed acid in the step B1 is prepared by mixing the following raw materials in a volume ratio of 4: 5, mixing concentrated nitric acid and concentrated sulfuric acid, wherein the mass fraction of the concentrated nitric acid is 75-80%, the mass fraction of the concentrated sulfuric acid is 75-80%, and the volume ratio of the second mixed acid in the step B2 is 11: 7, mixing concentrated nitric acid and concentrated sulfuric acid, wherein the mass fraction of the concentrated nitric acid is 70-80%, the mass fraction of the concentrated sulfuric acid is 70-80%, and the mass fraction of the sodium nitrite aqueous solution in the step B3 is 40-45%.
8. The preparation process of the anticorrosive paint based on the water-based epoxy resin as claimed in claim 1, wherein: the method specifically comprises the following steps:
step S1: adding talcum powder and kaolin powder into a pulverizer, pulverizing, sieving with a 300-mesh and 500-mesh sieve, and mixing to obtain mixed powder;
step S2: adding the aqueous epoxy resin emulsion into a stirring kettle, stirring for 5-10min at the rotation speed of 300-500r/min and the temperature of 30-50 ℃, adding the modified antistatic agent and the modified corrosion resistant agent, and continuously stirring for 30-40min at the temperature of 60-80 ℃ to prepare a premixed liquid;
step S3: and (4) adding the premixed liquid prepared in the step S2, the mixed powder prepared in the step S1, a defoaming agent and deionized water into a stirring kettle, and stirring for 1-1.5 hours at the rotating speed of 1000-1500r/min and the temperature of 25-30 ℃ to prepare the anticorrosive coating.
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| CN202010686394.6A CN111808500A (en) | 2020-07-16 | 2020-07-16 | Anticorrosive paint based on water-based epoxy resin and preparation process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112552794A (en) * | 2020-12-11 | 2021-03-26 | 安徽强旭塑业科技有限公司 | High-heat-resistance coating for battery case and preparation method thereof |
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| CN108546490A (en) * | 2018-03-22 | 2018-09-18 | 河北晨阳工贸集团有限公司 | A kind of aqueous antistatic, abrasion-proof terrace paint |
| CN110698902A (en) * | 2019-09-24 | 2020-01-17 | 江苏金陵特种涂料有限公司 | Preparation method of graphene water-based epoxy static conductive anticorrosive paint |
| CN111333979A (en) * | 2020-04-23 | 2020-06-26 | 安徽金喜龙新型建材有限公司 | Antique bamboo joint resin tile and preparation method thereof |
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| US20130126790A1 (en) * | 2004-03-17 | 2013-05-23 | E I Du Pont De Nemours And Company | Water dispersible polypyrroles made with polymeric acid colloids for electronics applications |
| CN108546490A (en) * | 2018-03-22 | 2018-09-18 | 河北晨阳工贸集团有限公司 | A kind of aqueous antistatic, abrasion-proof terrace paint |
| CN110698902A (en) * | 2019-09-24 | 2020-01-17 | 江苏金陵特种涂料有限公司 | Preparation method of graphene water-based epoxy static conductive anticorrosive paint |
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