CN112480780A - Anticorrosive paint and preparation method and application thereof - Google Patents
Anticorrosive paint and preparation method and application thereof Download PDFInfo
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- CN112480780A CN112480780A CN202011314228.XA CN202011314228A CN112480780A CN 112480780 A CN112480780 A CN 112480780A CN 202011314228 A CN202011314228 A CN 202011314228A CN 112480780 A CN112480780 A CN 112480780A
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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
- 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
- C09D5/10—Anti-corrosive paints containing metal dust
- C09D5/106—Anti-corrosive paints containing metal dust containing Zn
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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
- C09D7/61—Additives non-macromolecular inorganic
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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
- 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
- C09D7/70—Additives characterised by shape, e.g. fibres, flakes or microspheres
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0893—Zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
Abstract
The invention discloses an anticorrosive paint and a preparation method and application thereof, wherein the anticorrosive paint comprises a component A and a component B, wherein the component A comprises the following raw materials in percentage by weight: 45-65 parts of fluorine epoxy resin, 20-45 parts of diglycidyl ether, 5-15 parts of polyaniline zinc powder flakes, 0.02-0.1 part of dispersing agent, 0.05-1.5 parts of flatting agent, 0.05-0.1 part of defoaming agent, 10-30 parts of mixed solvent, 5-10 parts of filler, 0.5-3 parts of coupling agent, 5-10 parts of porous aerogel and 0.5-3 parts of wear-resisting agent. The invention adopts the characteristic that the molecular structure of the resin is compact by adopting the fluorine epoxy resin and the contact points with lower surface tension, friction factor and refractive index of the novolac epoxy resin, improves the hardness and viscosity of the coating, enhances the wear resistance and adhesive force of the anticorrosive coating, ensures that the polyaniline zinc powder scale has the dual properties of polyaniline and the zinc powder scale, and ensures that the metal surface is passivated by the interaction of the polyaniline and the metal surface.
Description
Technical Field
The invention relates to the technical field of anticorrosive coatings, and particularly relates to an anticorrosive coating and a preparation method and application thereof.
Background
At present, metal corrosion is a very serious problem currently faced. Roughly estimated, the annual loss of metal structures, equipment and materials caused by corrosion is about 20-40% of the annual metal yield, the worldwide annual metal scrapped by corrosion reaches more than 1 hundred million tons, and the economic loss accounts for 1.5-3.5% of the total value of national economy. In China, the economic loss caused by metal corrosion is over 300 million yuan each year, and accounts for 4 percent of the total value of national production.
Heavy duty anticorrosive coatings are a class of anticorrosive coatings that can be applied in relatively harsh corrosive environments relative to conventional anticorrosive coatings and have a longer protection period than conventional anticorrosive coatings. The heavy-duty anticorrosive paint mainly comprises high-performance synthetic resin. Epoxy resin is widely used because of its easy processing and molding, strong adhesion, excellent mechanical properties, etc.
At present, the protection of metal by adopting heavy anti-corrosion paint is the most effective anti-corrosion means. However, with the rapid development of modern industry and the continuous development and utilization of resources, the marine oil industry becomes an important component of emerging industries in China. In the marine oil industry, or in outdoor environments, where large amounts of steel materials are inevitably used, marine environments and outdoor environments have been very complex corrosive environments, which put higher demands on the performance of anticorrosive materials. There is a high necessity to develop a heavy anti-corrosive paint having excellent anti-corrosive performance in marine environment and outdoor special environment.
Chinese patent CN111253832A discloses a heavy-duty anticorrosive paint and application thereof. The invention provides a heavy-duty anticorrosive paint which comprises the following components in parts by weight: 30-40 parts of fluorine-containing epoxy resin, 20-30 parts of novolac epoxy resin, 20-30 parts of modified glass flakes, 10-20 parts of reactive diluent, 10-20 parts of curing agent, 5-15 parts of pigment and filler, 0.3-1.0 part of dispersing agent, 0.5-1.5 parts of defoaming agent, 0.5-1.0 part of flatting agent, 1-5 parts of thixotropic agent, 1-3 parts of wear-resisting agent and 1-3 parts of light stabilizer, wherein the mass parts of the modified glass flakes are calculated by mass parts of the glass flakes, and the results of the examples show that the material coated with the heavy anti-corrosion coating disclosed by the invention does not foam and crack after being soaked in simulated seawater for 150 days.
Although this application has solved the problem in the background art to a certain extent, anticorrosive coating does not have thermal-insulated effect in this application, and under ocean or outdoor annular, the inside and outside temperature of pipeline conducts easily, and the effect of keeping warm is poor, causes the interior medium of pipeline to have the potential safety hazard.
Disclosure of Invention
The invention aims to provide an anticorrosive coating and a preparation method and application thereof, wherein fluorine epoxy resin and novolac epoxy resin are adopted to improve the hardness and viscosity of the coating, the wear resistance and adhesive force of the anticorrosive coating are enhanced, polyaniline zinc powder scales have the dual properties of polyaniline and zinc powder scales, polyaniline interacts with the metal surface to passivate the metal surface to form a compact and stable oxidation film to prevent the metal from being further oxidized, and compared with glass scales, the mechanical property, the aging resistance and the like of the whole coating system can be obviously improved, the porous aerogel is added, the heat transfer is effectively blocked, the good heat preservation and insulation effects are achieved, the ultraviolet resistance and the toughness of the aliphatic isocyanate are adopted, the anti-corrosion effect of the heavy anti-corrosion coating is improved, and the problems in the background art are solved.
In order to achieve the purpose, the invention provides the following technical scheme: an anticorrosive paint comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 45-65 parts of fluorine epoxy resin, 20-45 parts of diglycidyl ether, 5-15 parts of polyaniline zinc powder flakes, 0.02-0.1 part of dispersing agent, 0.05-1.5 parts of flatting agent, 0.05-0.1 part of defoaming agent, 10-30 parts of mixed solvent, 5-10 parts of filler, 0.5-3 parts of coupling agent, 5-10 parts of porous aerogel and 0.5-3 parts of wear-resisting agent; the component B comprises the following raw materials in percentage by weight: 20-35 parts of phenolic epoxy resin, 1-5 parts of diethanolamine, 2-10 parts of aliphatic isocyanate, 15-30 parts of modified amine curing agent and 30-40 parts of absolute ethyl alcohol.
Preferably, the weight ratio of the component A to the component B is 1 (1-1.5).
Preferably, the dispersant is polyacrylic acid ammonium salt.
Preferably, the polyaniline-zinc powder scales comprise polyaniline-zinc powder scales with wafer lengths of 100 micrometers, 200 micrometers and 300 micrometers, the thickness of each wafer is 0.05-0.4 micrometers, and the weight ratio of the polyaniline-zinc powder scales with wafer lengths of 100 micrometers, 200 micrometers and 300 micrometers is 1: (1.2-1.5): (0.7-1.2).
Preferably, the coupling agent is at least one of a silane coupling agent KH550, a silane coupling agent KH560, a silane coupling agent KH570, a silane coupling agent KH580, a silane coupling agent KH602 and a silane coupling agent KH 792.
Preferably, the particle size of the porous aerogel is 10-30 microns, and the thermal conductivity is 0.01-0.03W/(m.K).
Preferably, the leveling agent is at least one of organic bentonite, fumed silica and polyethylene wax.
The invention aims to solve another technical problem of providing a preparation method of an anticorrosive paint, which comprises the following steps:
s1: preparing a component A:
s11: mixing the polyaniline zinc powder scales with a coupling agent to perform silane modification reaction to obtain modified polyaniline zinc powder scales;
s12: putting the fluorine epoxy resin and the diglycidyl ether into a reaction kettle, stirring and mixing, heating to 75-85 ℃, keeping the temperature for reaction for 1.5-2.5 hours, and cooling for later use;
s13: mixing the reactant in the S12 with the porous aerogel, stirring for 20-30 minutes, putting into a high-speed dispersion machine for preliminary dispersion, and after dispersing for 30-40 minutes, performing ultrasonic dispersion on the dispersion liquid by using an ultrasonic instrument;
s14: adding the modified polyaniline zinc powder flakes in the S11 into the S13, adding a defoaming agent, mixing to form slurry, putting the slurry into a grinder, and grinding for 1-2 hours to obtain slurry with the fineness of less than 50 micrometers;
s15: mixing and grinding the filler and the wear-resisting agent into particles with fineness less than 50 micrometers, putting the particles into the slurry in S14, adding the leveling agent and the mixed solvent into the slurry in S14, stirring and mixing for 1-2 hours, and filtering to obtain a component A;
s2: preparing a component B:
s21: putting the novolac epoxy resin into a reaction kettle for stirring, heating to 150 ℃, putting diethanol amine into the novolac epoxy resin, and carrying out heat preservation reaction for 2 hours;
s22: reducing the temperature of the reaction kettle in the S21 to 80 ℃, adding aliphatic isocyanate into the reaction kettle, stirring and mixing, and fully reacting for 2 hours;
s23: adding the modified amine curing agent and absolute ethyl alcohol into S22, stirring and mixing, and cooling to room temperature to obtain a component B;
s3: the component A and the component B are mixed according to the proportion of 1 (1-1.5) to prepare the anticorrosive paint.
Preferably, the preparation process of the polyaniline zinc powder scales in S11 is as follows:
s111: aniline and doping acid are mixed and stirred uniformly, and added into an oxidant, and stirred and mixed for 1-2 hours to obtain a product polyaniline;
s112: putting the zinc powder flakes into polyaniline in S111, centrifuging to obtain precipitate, washing with distilled water, heating to 110-120 ℃, and drying for 2-3 hours;
s113: and (4) grinding and screening the reactant obtained in the step (S112) to obtain polyaniline zinc powder scales.
Preferably, the anticorrosive paint is used for pipeline corrosion prevention in outdoor environment or special environment of marine environment.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the anticorrosive coating and the preparation method and application thereof, due to the characteristic that the molecular structure of the resin is compact by adopting the fluorine epoxy resin and the sticking points with lower surface tension, friction factor and refractive index of the novolac epoxy resin, the hardness and viscosity of the coating are improved, and the wear resistance and adhesive force of the anticorrosive coating are enhanced.
2. The polyaniline zinc powder scale has double properties of polyaniline and zinc powder scale, the polyaniline interacts with the metal surface to passivate the metal surface to form a compact and stable oxidation film to prevent the metal from being further oxidized, and the metal scale can obviously improve the mechanical property, the aging resistance and the like of the whole coating system compared with the glass scale.
3. According to the anticorrosive coating and the preparation method and application thereof, the porous aerogel and the fluorine epoxy resin are fully dispersed, the stability of the anticorrosive coating is improved, the heat transfer is effectively blocked, and a good heat preservation and heat insulation effect is achieved.
4. According to the anticorrosive coating and the preparation method and application thereof, the ultraviolet resistance and toughness of the aliphatic isocyanate are adopted, so that the anticorrosive effect of the heavy anticorrosive coating is improved, and the light aging resistance of the anticorrosive coating is improved.
Drawings
FIG. 1 is an overall flow chart of the present invention;
FIG. 2 is a flow diagram of the preparation of the A component of the present invention;
FIG. 3 is a flow chart of polyaniline zinc powder scale preparation of the present invention;
FIG. 4 is a flow chart of the preparation of component B according to the present invention;
FIG. 5 is a line graph of adhesion for an embodiment of the present invention;
FIG. 6 is a line graph illustrating the wear resistance of an embodiment of the present invention;
FIG. 7 is a line graph of thermal conductivity for an embodiment of the present invention;
FIG. 8 is a line graph of the maintained temperature difference for an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
An anticorrosive paint comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 45-65 parts of fluorine epoxy resin, 20-45 parts of diglycidyl ether, 5-15 parts of polyaniline zinc powder flakes, 0.02-0.1 part of dispersing agent, 0.05-1.5 parts of flatting agent, 0.05-0.1 part of defoaming agent, 10-30 parts of mixed solvent, 5-10 parts of filler, 0.5-3 parts of coupling agent, 5-10 parts of porous aerogel and 0.5-3 parts of wear-resisting agent.
The component B comprises the following raw materials in percentage by weight: 20-35 parts of phenolic epoxy resin, 1-5 parts of diethanolamine, 2-10 parts of aliphatic isocyanate, 15-30 parts of modified amine curing agent and 30-40 parts of absolute ethyl alcohol.
The weight ratio of the component A to the component B is 1 (1-1.5).
Wherein the dispersant adopts polyacrylic acid ammonium salt.
The polyaniline zinc powder scales comprise polyaniline zinc powder scales with wafer lengths of 100 micrometers, 200 micrometers and 300 micrometers, the thickness of each wafer is 0.05-0.4 micrometers, and the weight ratio of the polyaniline zinc powder scales with the wafer lengths of 100 micrometers, 200 micrometers and 300 micrometers is 1: (1.2-1.5): (0.7-1.2), the polyaniline zinc powder flakes have the dual properties of polyaniline and zinc powder flakes, the polyaniline interacts with the metal surface to passivate the metal surface to form a layer of compact and stable oxidation film to prevent the metal from further oxidation, and the metal flakes can obviously improve the mechanical property, the aging resistance and the like of the whole coating system compared with glass flakes.
The coupling agent is at least one of a silane coupling agent KH550, a silane coupling agent KH560, a silane coupling agent KH570, a silane coupling agent KH580, a silane coupling agent KH602 and a silane coupling agent KH 792;
the particle size of the porous aerogel is 10-30 microns, and the heat conductivity coefficient is 0.01-0.03W/(m.K).
The leveling agent is at least one of organic bentonite, fumed silica and polyethylene wax.
The anticorrosive paint is used for pipeline corrosion prevention in outdoor environment or special marine environment.
The first embodiment is as follows:
referring to fig. 1-4, the following raw materials are taken in parts by weight: a component A: 45 parts of fluorine epoxy resin, 45 parts of diglycidyl ether, 5 parts of polyaniline zinc powder flakes, 0.02 part of a dispersing agent, 1.5 parts of a leveling agent, 0.05 part of a defoaming agent, 30 parts of a mixed solvent, 5 parts of a filler, 3 parts of a coupling agent, 5 parts of a porous aerogel and 3 parts of a wear-resisting agent;
b, component B: 20 parts of phenolic epoxy resin, 5 parts of diethanol amine, 2 parts of aliphatic isocyanate, 30 parts of modified amine curing agent and 30 parts of absolute ethyl alcohol.
In order to better show the preparation process of the anticorrosive paint, the embodiment now provides a preparation method of the anticorrosive paint, which comprises the following steps:
s1: preparing a component A:
s11: mixing the polyaniline zinc powder scales with a coupling agent to perform silane modification reaction to obtain modified polyaniline zinc powder scales;
the preparation process of the polyaniline zinc powder scales in the S11 is as follows:
s111: mixing aniline and doping acid, stirring uniformly, adding the mixture into an oxidant, and stirring and mixing for 1 hour to obtain a product polyaniline;
s112: putting the zinc powder flakes into polyaniline in S111, centrifuging to obtain precipitate, washing with distilled water, heating to 110 ℃, and drying for 3 hours;
s113: and (4) grinding and screening the reactant obtained in the step (S112) to obtain polyaniline zinc powder scales.
S12: putting the fluorine epoxy resin and the diglycidyl ether into a reaction kettle, stirring and mixing, heating to 75 ℃, keeping the temperature for reaction for 2.5 hours, and cooling for later use;
s13: mixing the reactant in the S12 with the porous aerogel, stirring for 20 minutes, putting into a high-speed dispersion machine for preliminary dispersion, and after dispersing for 40 minutes, performing ultrasonic dispersion on the dispersion liquid by using an ultrasonic instrument;
s14: adding the modified polyaniline zinc powder flakes in the S11 into the S13, adding a defoaming agent, mixing to form slurry, putting the slurry into a grinder, and grinding for 1 hour to obtain slurry with the fineness of less than 50 microns;
s15: and mixing and grinding the filler and the wear-resisting agent into particles with the fineness of less than 50 micrometers, putting the particles into the slurry in S14, adding the leveling agent and the mixed solvent into the slurry in S14, stirring and mixing for 2 hours, and filtering to obtain the component A.
S2: preparing a component B:
s21: putting the novolac epoxy resin into a reaction kettle for stirring, heating to 150 ℃, putting diethanol amine into the novolac epoxy resin, and carrying out heat preservation reaction for 2 hours;
s22: reducing the temperature of the reaction kettle in the S21 to 80 ℃, adding aliphatic isocyanate into the reaction kettle, stirring and mixing, and fully reacting for 2 hours;
s23: and adding the modified amine curing agent and absolute ethyl alcohol into the S22, stirring and mixing, and cooling to room temperature to obtain a component B.
S3: the component A and the component B are mixed according to the ratio of 1:1 to prepare the anticorrosive paint.
Example two:
referring to fig. 1-4, the following raw materials are taken in parts by weight: a component A: 50 parts of fluorine epoxy resin, 25 parts of diglycidyl ether, 7 parts of polyaniline zinc powder flakes, 0.05 part of a dispersing agent, 0.08 part of a flatting agent, 0.08 part of a defoaming agent, 13 parts of a mixed solvent, 6 parts of a filler, 0.8 part of a coupling agent, 5.6 parts of porous aerogel and 0.8 part of a wear-resistant agent.
B, component B: 23 parts of phenolic epoxy resin, 1.5 parts of diethanol amine, 3.5 parts of aliphatic isocyanate, 17 parts of modified amine curing agent and 33 parts of absolute ethyl alcohol.
In order to better show the preparation process of the anticorrosive paint, the embodiment now provides a preparation method of the anticorrosive paint, which comprises the following steps:
s1: preparing a component A:
s11: mixing the polyaniline zinc powder scales with a coupling agent to perform silane modification reaction to obtain modified polyaniline zinc powder scales;
the preparation process of the polyaniline zinc powder scales in the S11 is as follows:
s111: mixing aniline and doping acid, stirring uniformly, adding the mixture into an oxidant, and stirring and mixing for 1 hour to obtain a product polyaniline;
s112: putting the zinc powder flakes into polyaniline in S111, centrifuging to obtain precipitate, washing with distilled water, heating to 110 ℃, and drying for 3 hours;
s113: and (4) grinding and screening the reactant obtained in the step (S112) to obtain polyaniline zinc powder scales.
S12: putting the fluorine epoxy resin and the diglycidyl ether into a reaction kettle, stirring and mixing, heating to 75 ℃, keeping the temperature for reaction for 2.5 hours, and cooling for later use;
s13: mixing the reactant in the S12 with the porous aerogel, stirring for 20 minutes, putting into a high-speed dispersion machine for preliminary dispersion, and after dispersing for 40 minutes, performing ultrasonic dispersion on the dispersion liquid by using an ultrasonic instrument;
s14: adding the modified polyaniline zinc powder flakes in the S11 into the S13, adding a defoaming agent, mixing to form slurry, putting the slurry into a grinder, and grinding for 1 hour to obtain slurry with the fineness of less than 50 microns;
s15: and mixing and grinding the filler and the wear-resisting agent into particles with the fineness of less than 50 micrometers, putting the particles into the slurry in S14, adding the leveling agent and the mixed solvent into the slurry in S14, stirring and mixing for 2 hours, and filtering to obtain the component A.
S2: preparing a component B:
s21: putting the novolac epoxy resin into a reaction kettle for stirring, heating to 150 ℃, putting diethanol amine into the novolac epoxy resin, and carrying out heat preservation reaction for 2 hours;
s22: reducing the temperature of the reaction kettle in the S21 to 80 ℃, adding aliphatic isocyanate into the reaction kettle, stirring and mixing, and fully reacting for 2 hours;
s23: and adding the modified amine curing agent and absolute ethyl alcohol into the S22, stirring and mixing, and cooling to room temperature to obtain a component B.
S3: the component A and the component B are mixed according to the ratio of 1:1 to prepare the anticorrosive paint.
Example three:
referring to fig. 1-4, the following raw materials are taken in parts by weight: a component A: 52 parts of fluorine epoxy resin, 27 parts of diglycidyl ether, 9 parts of polyaniline zinc powder flakes, 0.07 part of a dispersing agent, 0.12 part of a leveling agent, 0.15 part of a defoaming agent, 16 parts of a mixed solvent, 7.8 parts of a filler, 1.8 parts of a coupling agent, 7.5 parts of porous aerogel and 1.2 parts of a wear-resisting agent.
B, component B: 27 parts of phenolic epoxy resin, 3.5 parts of diethanol amine, 4.5 parts of aliphatic isocyanate, 19 parts of modified amine curing agent and 35 parts of absolute ethyl alcohol.
In order to better show the preparation process of the anticorrosive paint, the embodiment now provides a preparation method of the anticorrosive paint, which comprises the following steps:
s1: preparing a component A:
s11: mixing the polyaniline zinc powder scales with a coupling agent to perform silane modification reaction to obtain modified polyaniline zinc powder scales;
the preparation process of the polyaniline zinc powder scales in the S11 is as follows:
s111: mixing aniline and doping acid, stirring uniformly, adding the mixture into an oxidant, and stirring and mixing for 1 hour to obtain a product polyaniline;
s112: putting the zinc powder flakes into polyaniline in S111, centrifuging to obtain precipitate, washing with distilled water, heating to 115 ℃, and drying for 2.8 hours;
s113: and (4) grinding and screening the reactant obtained in the step (S112) to obtain polyaniline zinc powder scales.
S12: putting the fluorine epoxy resin and the diglycidyl ether into a reaction kettle, stirring and mixing, heating to 80 ℃, keeping the temperature for reaction for 3 hours, and cooling for later use;
s13: mixing the reactant in the S12 with the porous aerogel, stirring for 20 minutes, putting into a high-speed dispersion machine for preliminary dispersion, and after dispersing for 40 minutes, performing ultrasonic dispersion on the dispersion liquid by using an ultrasonic instrument;
s14: adding the modified polyaniline zinc powder flakes in the S11 into the S13, adding a defoaming agent, mixing to form slurry, putting the slurry into a grinder, and grinding for 1 hour to obtain slurry with the fineness of less than 50 microns;
s15: and mixing and grinding the filler and the wear-resisting agent into particles with the fineness of less than 50 micrometers, putting the particles into the slurry in S14, adding the leveling agent and the mixed solvent into the slurry in S14, stirring and mixing for 2 hours, and filtering to obtain the component A.
S2: preparing a component B:
s21: putting the novolac epoxy resin into a reaction kettle for stirring, heating to 150 ℃, putting diethanol amine into the novolac epoxy resin, and carrying out heat preservation reaction for 2 hours;
s22: reducing the temperature of the reaction kettle in the S21 to 80 ℃, adding aliphatic isocyanate into the reaction kettle, stirring and mixing, and fully reacting for 2 hours;
s23: and adding the modified amine curing agent and absolute ethyl alcohol into the S22, stirring and mixing, and cooling to room temperature to obtain a component B.
S3: the component A and the component B are mixed according to the ratio of 1:1 to prepare the anticorrosive paint.
Example four:
referring to fig. 1-4, the following raw materials are taken in parts by weight: a component A: 50 parts of fluorine epoxy resin, 35 parts of diglycidyl ether, 10 parts of polyaniline zinc powder flakes, 0.09 part of a dispersing agent, 0.98 part of a flatting agent, 0.08 part of a defoaming agent, 20 parts of a mixed solvent, 8 parts of a filler, 2 parts of a coupling agent, 8 parts of porous aerogel and 2 parts of a wear-resisting agent.
B, component B: 30 parts of phenolic epoxy resin, 4 parts of diethanol amine, 7 parts of aliphatic isocyanate, 25 parts of modified amine curing agent and 36 parts of absolute ethyl alcohol.
In order to better show the preparation process of the anticorrosive paint, the embodiment now provides a preparation method of the anticorrosive paint, which comprises the following steps:
s1: preparing a component A:
s11: mixing the polyaniline zinc powder scales with a coupling agent to perform silane modification reaction to obtain modified polyaniline zinc powder scales;
the preparation process of the polyaniline zinc powder scales in the S11 is as follows:
s111: mixing aniline and doping acid, stirring uniformly, adding the mixture into an oxidant, and stirring and mixing for 1 hour to obtain a product polyaniline;
s112: putting the zinc powder flakes into polyaniline in S111, centrifuging to obtain precipitate, washing with distilled water, heating to 112 ℃, and drying for 3 hours;
s113: and (4) grinding and screening the reactant obtained in the step (S112) to obtain polyaniline zinc powder scales.
S12: putting the fluorine epoxy resin and the diglycidyl ether into a reaction kettle, stirring and mixing, heating to 82 ℃, keeping the temperature for reaction for 2.5 hours, and cooling for later use;
s13: mixing the reactant in the S12 with the porous aerogel, stirring for 20 minutes, putting into a high-speed dispersion machine for preliminary dispersion, and after dispersing for 40 minutes, performing ultrasonic dispersion on the dispersion liquid by using an ultrasonic instrument;
s14: adding the modified polyaniline zinc powder flakes in the S11 into the S13, adding a defoaming agent, mixing to form slurry, putting the slurry into a grinder, and grinding for 2 hours to obtain slurry with the fineness of less than 50 micrometers;
s15: and mixing and grinding the filler and the wear-resisting agent into particles with the fineness of less than 50 micrometers, putting the particles into the slurry in S14, adding the leveling agent and the mixed solvent into the slurry in S14, stirring and mixing for 2 hours, and filtering to obtain the component A.
S2: preparing a component B:
s21: putting the novolac epoxy resin into a reaction kettle for stirring, heating to 150 ℃, putting diethanol amine into the novolac epoxy resin, and carrying out heat preservation reaction for 2 hours;
s22: reducing the temperature of the reaction kettle in the S21 to 80 ℃, adding aliphatic isocyanate into the reaction kettle, stirring and mixing, and fully reacting for 2 hours;
s23: and adding the modified amine curing agent and absolute ethyl alcohol into the S22, stirring and mixing, and cooling to room temperature to obtain a component B.
S3: the component A and the component B are mixed according to the ratio of 1:1 to prepare the anticorrosive paint.
Example five:
referring to fig. 1-4, the following raw materials are taken in parts by weight: a component A: 60 parts of fluorine epoxy resin, 40 parts of diglycidyl ether, 12 parts of polyaniline zinc powder flakes, 0.09 part of a dispersing agent, 1.3 parts of a leveling agent, 0.09 part of a defoaming agent, 28 parts of a mixed solvent, 9 parts of a filler, 2.8 parts of a coupling agent, 9 parts of porous aerogel and 2.7 parts of a wear-resisting agent.
B, component B: 33 parts of phenolic epoxy resin, 4 parts of diethanol amine, 8 parts of aliphatic isocyanate, 28 parts of modified amine curing agent and 38 parts of absolute ethyl alcohol.
In order to better show the preparation process of the anticorrosive paint, the embodiment now provides a preparation method of the anticorrosive paint, which comprises the following steps:
s1: preparing a component A:
s11: mixing the polyaniline zinc powder scales with a coupling agent to perform silane modification reaction to obtain modified polyaniline zinc powder scales;
the preparation process of the polyaniline zinc powder scales in the S11 is as follows:
s111: mixing aniline and doping acid, stirring uniformly, adding the mixture into an oxidant, and stirring and mixing for 1 hour to obtain a product polyaniline;
s112: putting the zinc powder flakes into polyaniline in S111, centrifuging to obtain precipitate, washing with distilled water, heating to 120 ℃, and drying for 2 hours;
s113: and (4) grinding and screening the reactant obtained in the step (S112) to obtain polyaniline zinc powder scales.
S12: putting the fluorine epoxy resin and the diglycidyl ether into a reaction kettle, stirring and mixing, heating to 85 ℃, keeping the temperature for reaction for 1.5 hours, and cooling for later use;
s13: mixing the reactant in the S12 with the porous aerogel, stirring for 30 minutes, putting into a high-speed dispersion machine for preliminary dispersion, and after dispersing for 30 minutes, performing ultrasonic dispersion on the dispersion liquid by using an ultrasonic instrument;
s14: adding the modified polyaniline zinc powder flakes in the S11 into the S13, adding a defoaming agent, mixing to form slurry, putting the slurry into a grinder, and grinding for 2 hours to obtain slurry with the fineness of less than 50 micrometers;
s15: and mixing and grinding the filler and the wear-resisting agent into particles with the fineness of less than 50 micrometers, putting the particles into the slurry in S14, adding the leveling agent and the mixed solvent into the slurry in S14, stirring and mixing for 1 hour, and filtering to obtain the component A.
S2: preparing a component B:
s21: putting the novolac epoxy resin into a reaction kettle for stirring, heating to 150 ℃, putting diethanol amine into the novolac epoxy resin, and carrying out heat preservation reaction for 2 hours;
s22: reducing the temperature of the reaction kettle in the S21 to 80 ℃, adding aliphatic isocyanate into the reaction kettle, stirring and mixing, and fully reacting for 2 hours;
s23: and adding the modified amine curing agent and absolute ethyl alcohol into the S22, stirring and mixing, and cooling to room temperature to obtain a component B.
S3: the component A and the component B are mixed according to the ratio of 1:1.5 to prepare the anticorrosive paint.
Example six:
referring to fig. 1-4, the following raw materials are taken in parts by weight: a component A: 65 parts of fluorine epoxy resin, 20 parts of diglycidyl ether, 15 parts of polyaniline zinc powder flakes, 0.1 part of a dispersing agent, 1.5 parts of a flatting agent, 0.1 part of a defoaming agent, 10 parts of a mixed solvent, 10 parts of a filler, 0.5 part of a coupling agent, 10 parts of porous aerogel and 0.5 part of a wear-resistant agent.
B, component B: 35 parts of phenolic epoxy resin, 1 part of diethanol amine, 10 parts of aliphatic isocyanate, 15 parts of modified amine curing agent and 40 parts of absolute ethyl alcohol.
In order to better show the preparation process of the anticorrosive paint, the embodiment now provides a preparation method of the anticorrosive paint, which comprises the following steps:
s1: preparing a component A:
s11: mixing the polyaniline zinc powder scales with a coupling agent to perform silane modification reaction to obtain modified polyaniline zinc powder scales;
the preparation process of the polyaniline zinc powder scales in the S11 is as follows:
s111: mixing aniline and doping acid, stirring uniformly, adding the mixture into an oxidant, and stirring and mixing for 1 hour to obtain a product polyaniline;
s112: putting the zinc powder flakes into polyaniline in S111, centrifuging to obtain precipitate, washing with distilled water, heating to 120 ℃, and drying for 2 hours;
s113: and (4) grinding and screening the reactant obtained in the step (S112) to obtain polyaniline zinc powder scales.
S12: putting the fluorine epoxy resin and the diglycidyl ether into a reaction kettle, stirring and mixing, heating to 85 ℃, keeping the temperature for reaction for 1.5 hours, and cooling for later use;
s13: mixing the reactant in the S12 with the porous aerogel, stirring for 30 minutes, putting into a high-speed dispersion machine for preliminary dispersion, and after dispersing for 30 minutes, performing ultrasonic dispersion on the dispersion liquid by using an ultrasonic instrument;
s14: adding the modified polyaniline zinc powder flakes in the S11 into the S13, adding a defoaming agent, mixing to form slurry, putting the slurry into a grinder, and grinding for 2 hours to obtain slurry with the fineness of less than 50 micrometers;
s15: and mixing and grinding the filler and the wear-resisting agent into particles with the fineness of less than 50 micrometers, putting the particles into the slurry in S14, adding the leveling agent and the mixed solvent into the slurry in S14, stirring and mixing for 1 hour, and filtering to obtain the component A.
S2: preparing a component B:
s21: putting the novolac epoxy resin into a reaction kettle for stirring, heating to 150 ℃, putting diethanol amine into the novolac epoxy resin, and carrying out heat preservation reaction for 2 hours;
s22: reducing the temperature of the reaction kettle in the S21 to 80 ℃, adding aliphatic isocyanate into the reaction kettle, stirring and mixing, and fully reacting for 2 hours;
s23: and adding the modified amine curing agent and absolute ethyl alcohol into the S22, stirring and mixing, and cooling to room temperature to obtain a component B.
S3: the component A and the component B are mixed according to the ratio of 1:1.5 to prepare the anticorrosive paint.
The anticorrosive coatings obtained in examples one to six were subjected to an experiment, and the following data tables and data charts of fig. 5 to 8 were obtained:
through the table, the anticorrosive coatings in the first to sixth examples have better impact resistance, seawater immersion resistance and ultraviolet light aging resistance, and are suitable for marine environments and special outdoor environments, but the anticorrosive coatings in the first to sixth examples have better proportion, wear resistance and heat insulation performance than other examples, so that the anticorrosive coatings prepared by the proportion in the third example have the best performance.
In summary, the following steps: the anticorrosive coating and the preparation method and application thereof adopt the epoxy fluoride resin and the epoxy novolac resin to improve the hardness and viscosity of the coating, enhance the wear resistance and adhesive force of the anticorrosive coating, the polyaniline zinc powder flakes have the dual properties of the polyaniline and the zinc powder flakes, the polyaniline interacts with the metal surface to passivate the metal surface to form a compact and stable oxidation film, prevent the further oxidation of metal, compared with the glass flakes, the mechanical property, the aging resistance and the like of the whole coating system can be obviously improved, the porous aerogel is increased to effectively block the heat transfer, and the anticorrosive coating has better heat preservation and insulation effects, adopts the ultraviolet resistance and toughness characteristics of aliphatic isocyanate, and improves the anticorrosive effect of the heavy anticorrosive coating.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (10)
1. An anticorrosive paint comprises a component A and a component B, and is characterized in that: the component A comprises the following raw materials in percentage by weight: 45-65 parts of fluorine epoxy resin, 20-45 parts of diglycidyl ether, 5-15 parts of polyaniline zinc powder flakes, 0.02-0.1 part of dispersing agent, 0.05-1.5 parts of flatting agent, 0.05-0.1 part of defoaming agent, 10-30 parts of mixed solvent, 5-10 parts of filler, 0.5-3 parts of coupling agent, 5-10 parts of porous aerogel and 0.5-3 parts of wear-resisting agent; the component B comprises the following raw materials in percentage by weight: 20-35 parts of phenolic epoxy resin, 1-5 parts of diethanolamine, 2-10 parts of aliphatic isocyanate, 15-30 parts of modified amine curing agent and 30-40 parts of absolute ethyl alcohol.
2. An anticorrosive paint according to claim 1, characterized in that: the weight ratio of the component A to the component B is 1 (1-1.5).
3. An anticorrosive paint according to claim 1, characterized in that: the dispersant adopts polyacrylic ammonium salt.
4. An anticorrosive paint according to claim 1, characterized in that: the polyaniline zinc powder scales comprise polyaniline zinc powder scales with wafer lengths of 100 micrometers, 200 micrometers and 300 micrometers, the thickness of each wafer is 0.05-0.4 micrometers, and the weight ratio of the polyaniline zinc powder scales with the wafer lengths of 100 micrometers, 200 micrometers and 300 micrometers is 1: (1.2-1.5): (0.7-1.2).
5. An anticorrosive paint according to claim 1, characterized in that: the coupling agent is at least one of a silane coupling agent KH550, a silane coupling agent KH560, a silane coupling agent KH570, a silane coupling agent KH580, a silane coupling agent KH602 and a silane coupling agent KH 792.
6. An anticorrosive paint according to claim 1, characterized in that: the particle size of the porous aerogel is 10-30 microns, and the heat conductivity coefficient is 0.01-0.03W/(m.K).
7. An anticorrosive paint according to claim 1, characterized in that: the leveling agent is at least one of organic bentonite, fumed silica and polyethylene wax.
8. A method for preparing an anticorrosive paint according to any one of claims 1 to 7, characterized by comprising the steps of:
s1: preparing a component A:
s11: mixing the polyaniline zinc powder scales with a coupling agent to perform silane modification reaction to obtain modified polyaniline zinc powder scales;
s12: putting the fluorine epoxy resin and the diglycidyl ether into a reaction kettle, stirring and mixing, heating to 75-85 ℃, keeping the temperature for reaction for 1.5-2.5 hours, and cooling for later use;
s13: mixing the reactant in the S12 with the porous aerogel, stirring for 20-30 minutes, putting into a high-speed dispersion machine for preliminary dispersion, and after dispersing for 30-40 minutes, performing ultrasonic dispersion on the dispersion liquid by using an ultrasonic instrument;
s14: adding the modified polyaniline zinc powder flakes in the S11 into the S13, adding a defoaming agent, mixing to form slurry, putting the slurry into a grinder, and grinding for 1-2 hours to obtain slurry with the fineness of less than 50 micrometers;
s15: mixing and grinding the filler and the wear-resisting agent into particles with fineness less than 50 micrometers, putting the particles into the slurry in S14, adding the leveling agent and the mixed solvent into the slurry in S14, stirring and mixing for 1-2 hours, and filtering to obtain a component A;
s2: preparing a component B:
s21: putting the novolac epoxy resin into a reaction kettle for stirring, heating to 150 ℃, putting diethanol amine into the novolac epoxy resin, and carrying out heat preservation reaction for 2 hours;
s22: reducing the temperature of the reaction kettle in the S21 to 80 ℃, adding aliphatic isocyanate into the reaction kettle, stirring and mixing, and fully reacting for 2 hours;
s23: adding the modified amine curing agent and absolute ethyl alcohol into S22, stirring and mixing, and cooling to room temperature to obtain a component B;
s3: the component A and the component B are mixed according to the proportion of 1 (1-1.5) to prepare the anticorrosive paint.
9. A method for preparing an anticorrosive paint according to claim 8, characterized in that: the preparation process of the polyaniline zinc powder scales in the S11 is as follows:
s111: aniline and doping acid are mixed and stirred uniformly, and added into an oxidant, and stirred and mixed for 1-2 hours to obtain a product polyaniline;
s112: putting the zinc powder flakes into polyaniline in S111, centrifuging to obtain precipitate, washing with distilled water, heating to 110-120 ℃, and drying for 2-3 hours;
s113: and (4) grinding and screening the reactant obtained in the step (S112) to obtain polyaniline zinc powder scales.
10. Use of an anticorrosive paint according to any one of claims 1 to 7, characterized in that: the anticorrosive paint is used for pipeline corrosion prevention in outdoor environment or special marine environment.
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| CN116042057A (en) * | 2023-01-05 | 2023-05-02 | 中国长江电力股份有限公司 | Graphene zinc-containing anticorrosive paint and preparation method and application thereof |
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Application publication date: 20210312 |