CN110922855A - Water-based high-temperature-resistant long-acting anticorrosive paint and preparation method thereof - Google Patents
Water-based high-temperature-resistant long-acting anticorrosive paint and preparation method thereof Download PDFInfo
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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
- C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
- C09D5/084—Inorganic compounds
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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
- C09D5/18—Fireproof paints including high temperature resistant paints
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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
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
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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
- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/327—Aluminium phosphate
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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
- C08L2205/03—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 a water-based high-temperature-resistant long-acting anticorrosive paint and a preparation method thereof. The component A comprises the following raw materials: film forming matter water phenolic epoxy resin, carbon black, antirust pigment, extender pigment containing sericite powder, anti-settling agent, deionized water, epoxy silane coupling agent and other auxiliary agents; the component B comprises the following raw materials: a curing agent, propylene glycol methyl ether; the mass ratio of the component A to the component B is (4-6) to 1. According to the invention, the water-based novolac epoxy resin is used as a film forming substance, and the water-based novolac epoxy resin is matched with the sericite powder, so that the water-based novolac epoxy resin provides excellent anti-permeability for a coating layer by virtue of a flaky structure; and the epoxy silane coupling agent is added to improve the crosslinking degree and compactness of the coating, thereby greatly improving the heat resistance, chemical resistance, hardness and wear resistance of the coating and solving the defect that the existing water-based coating can not simultaneously resist high temperature and long-acting corrosion.
Description
Technical Field
The invention belongs to the technical field of industrial anticorrosive coatings, and particularly relates to a water-based high-temperature-resistant long-acting anticorrosive coating and a preparation method thereof.
Background
The flue gas of the desulfurization tower of the waste incineration power plant contains acidic gas. The inlet temperature of the flue gas absorption tower reaches 160-180 ℃ for a long time, the short-term temperature reaches up to 250 ℃, and a certain dry and wet interface is formed; the smoke temperature at the outlet of the absorption tower is close to the acid dew point temperature. According to correlation detection, in general SO2The discharge concentration is less than or equal to 350mg/Nm3. After the in-situ desulfurization by lime water washing method, H possibly remains in the washing liquid2SO4Strongly corrosive solutions such as HCl and HF,and the corrosion to the inside of the desulfurizing tower device is further aggravated in a high-temperature and high-humidity environment. Therefore, the coating applied to the inner wall of the desulfurizing tower device is required to have high temperature resistance, and also have corrosion resistance such as lime water resistance, acid resistance and the like.
At present, most of coatings for the inner wall of a desulfurizing tower device are two-component solvent coatings, and can meet certain field requirements. However, the conventional solvent-based coating discharges a large amount of VOC during both the manufacturing process and the construction application process, which causes environmental pollution. In the face of the gradual deterioration of the world environment, the development of environment-friendly water-based paint is imperative. However, no aqueous coating which can cope with such severe conditions has been reported previously, and the present invention fills the gap in the market.
Disclosure of Invention
The invention aims to provide a water-based high-temperature-resistant long-acting anticorrosive paint and a preparation method thereof.
In order to solve the problems, the following technical scheme is adopted:
the water-based high-temperature-resistant long-acting anticorrosive paint is characterized by comprising a component A and a component B, wherein the mass ratio of the component A to the component B is (4-6): 1.
The component A comprises the following raw materials in parts by mass: 42-55 parts of a film forming substance; 2-3 parts of carbon black; 5-10 parts of an anti-rust pigment; 15-20 parts of extender pigment; 0.3-0.6 part of anti-settling agent; 12-20 parts of deionized water; 0.5-1 part of epoxy silane coupling agent; 3.4-6.3 parts of other additives.
Wherein the film-forming substance is water-based novolac epoxy resin; the extender pigment comprises 5-8 parts of sericite powder.
The component B comprises the following raw materials in parts by mass: 80-90 parts of a curing agent; 10-20 parts of propylene glycol methyl ether.
In the scheme, the antirust pigment is a mixture of modified calcium phosphomolybdate and aluminum polyphosphate, and the mass ratio of the modified calcium phosphomolybdate to the aluminum polyphosphate in the mixture is 3 (1-2).
The extender pigment also comprises 2-3 parts of talcum powder and 8-9 parts of barium sulfate.
The anti-settling agent is refined hectorite clay.
The other auxiliary agents include a dispersant, a defoaming agent, a wetting agent, a leveling agent, an anti-flash rust agent and a thickener. The dispersing agent is a high molecular weight polyurethane segmented copolymer solution containing a plurality of pigment-philic groups, and the mass part of the dispersing agent is 1.5-3 parts. The defoaming agent is an organic silicon defoaming agent, and the mass portion of the defoaming agent is 0.2-0.3 portion. The wetting agent is polyether modified polydimethylsiloxane copolymer and is 0.3-0.4 part by mass. The leveling agent is polyacrylate and accounts for 0.3-0.5 parts by weight. The anti-flash rust agent is a modified zinc chelate, and the mass part of the anti-flash rust agent is 0.3-1 part. The thickening agent is a polyurethane associated thickening agent, and the mass portion of the thickening agent is 0.8-1.1.
The curing agent adopts a waterborne modified polyamine curing agent.
The preparation method of the water-based high-temperature-resistant long-acting anticorrosive paint is characterized by comprising the following steps of:
1) and preparing a component A:
① sanding color paste is prepared by weighing 12-20 parts of deionized water, weighing 1.5-3 parts of dispersing agent, putting into a dry and clean dispersing kettle, starting a stirrer, controlling the rotating speed to be 300-500 r/m, sequentially adding 0.2-0.3 part of defoaming agent, 2-3 parts of carbon black, 5-10 parts of antirust pigment, 5-8 parts of sericite powder in extender pigment, 10-12 parts of residual extender pigment and 0.3-0.6 part of anti-settling agent, stirring for 8-15 minutes at the speed of 800-1200 r/m, uniformly stirring, and grinding to the fineness of below 50um by using a sand mill to obtain the resin-free color paste.
② preparing the paint, namely adding 42-55 parts of water-based novolac epoxy resin, 0.3-0.4 part of wetting agent, 0.3-0.5 part of flatting agent, 0.3-1 part of anti-flash rust agent, 0.5-1 part of epoxy silane coupling agent and 0.8-1.1 part of thickening agent into the obtained resin-free color paste in a dispersion kettle at a stirring speed of 300-500 rpm in sequence, stirring for 10-20 minutes at a speed of 1000-2000 rpm, and filtering by a 100-200-mesh filter screen to obtain the component A.
2) Preparing a component B:
weighing 80-90 parts of water-based modified polyamine curing agent, putting into a dry and clean dispersion kettle, starting a stirrer, stirring at the speed of 300-500 rpm, adding 10-20 parts of propylene glycol monomethyl ether, continuously stirring for 5-10 minutes until the fluid is uniform, and filtering with a 100-200 mesh filter screen to obtain the component B.
3) Mixing the component A prepared in the step 1) and the component B prepared in the step 2) according to the mass ratio of (4-6) to 1, uniformly stirring, and curing for 10-20 minutes to obtain the water-based high-temperature-resistant long-acting anticorrosive paint.
By adopting the scheme, the method has the following advantages:
the water-based high-temperature-resistant long-acting anticorrosive paint disclosed by the invention utilizes the water-based novolac epoxy resin as a film forming substance, so that higher heat resistance is provided for the paint; the scale-shaped structure of the sericite powder in the extender pigment is good in shielding property when horizontally arranged in the coating layer and has excellent anti-penetration capability, so that the coating layer can well isolate corrosive media, and good anti-corrosion performance of the coating layer is realized; the epoxy silane coupling agent is used as an adhesion promoter, the Y-glycidyl ether can react with various organic functional groups, and the alkoxy group of the oligomer silane can firmly form a chemical bond with an inorganic base material, so that the dry and wet bonding strength is improved, and the crosslinking effect is formed through dealcoholization, so that the crosslinking degree and compactness of the coating are improved, and the heat resistance, chemical resistance, hardness and wear resistance of the coating are greatly improved. The technical scheme of the invention solves the defect that the existing water-based paint can not simultaneously resist high temperature and long-acting corrosion. Compared with the traditional solvent type, the release amount of VOC of the used water-based novolac epoxy resin is less than 80g/L, and the water-based novolac epoxy resin conforms to the national green environmental protection development direction.
The water-based high-temperature-resistant long-acting anticorrosive coating disclosed by the invention has high temperature resistance and anticorrosive performance comparable to those of a solvent-based coating, is safe and environment-friendly, accords with the green development direction, avoids the generation of toxic and harmful gases and VOC (volatile organic compounds) of the solvent-based coating, is not easy to burn and explode, is simple to construct, can replace the traditional solvent-based coating, and has a wide application prospect.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example one
The water-based high-temperature-resistant long-acting anticorrosive paint comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 6: 1.
The component A comprises the following raw materials in parts by mass: 42 parts of water-based novolac epoxy resin; 2 parts of carbon black; 5 parts of an antirust pigment; 15 parts of extender pigment consisting of 5 parts of sericite powder, 2 parts of talcum powder and 8 parts of barium sulfate; 0.3 part of anti-settling agent; 20 parts of deionized water; 0.5 part of epoxy silane coupling agent; 3.4 parts of other auxiliary agents which are composed of 1.5 parts of dispersing agent, 0.2 part of defoaming agent, 0.3 part of wetting agent, 0.3 part of flatting agent, 0.3 part of flash rust inhibitor and 0.8 part of thickening agent.
The component B comprises the following raw materials in parts by mass: 90 parts of a curing agent; 10 parts of propylene glycol methyl ether.
The antirust pigment is a mixture of modified calcium phosphomolybdate and aluminum polyphosphate, and the mass ratio of the modified calcium phosphomolybdate to the aluminum polyphosphate in the mixture is 3: 2.
The anti-settling agent is refined hectorite clay.
The dispersing agent is a high molecular weight polyurethane segmented copolymer solution containing a plurality of pigment-philic groups.
The defoaming agent is an organic silicon defoaming agent.
The wetting agent is polyether modified polydimethylsiloxane copolymer.
The flatting agent is polyacrylate flatting agent.
The flash rust inhibitor is a modified zinc chelate.
The thickening agent is a polyurethane associative thickening agent.
The curing agent adopts a waterborne modified polyamine curing agent.
The preparation method of the water-based high-temperature-resistant long-acting anticorrosive paint comprises the following steps of:
1) and preparing a component A:
① grinding color paste, weighing 20 parts of deionized water, weighing 1.5 parts of dispersant, putting into a dry and clean dispersion kettle, starting a stirrer, controlling the rotating speed at 300 r/min, sequentially adding 0.2 part of defoamer, 2 parts of carbon black, 5 parts of antirust pigment, 5 parts of sericite powder, 2 parts of talcum powder, 8 parts of barium sulfate and 0.3 part of anti-settling agent, stirring for 15 minutes at the speed of 800 r/min, uniformly stirring, and grinding to the fineness of below 50um by using a sand mill to obtain the resin-free color paste.
② preparing into paint, adding 42 parts of water-borne novolac epoxy resin, 0.3 part of wetting agent, 0.3 part of flatting agent, 0.3 part of anti-flash rust agent, 0.5 part of epoxy silane coupling agent and 0.8 part of thickening agent into the resin-free color paste obtained by grinding the pulp at a stirring speed of 300 r/min in a dispersion kettle, stirring for 20 minutes at a stirring speed of 1000 r/min, and filtering by a 200-mesh filter screen to obtain the component A.
2) Preparing a component B:
weighing 90 parts of waterborne modified polyamine curing agent, putting the waterborne modified polyamine curing agent into a dry and clean dispersion kettle, starting a stirrer, stirring at the speed of 500 rpm, adding 10 parts of propylene glycol methyl ether, continuously stirring for 5 minutes until fluid is uniform, and filtering by a 200-mesh filter screen to obtain the component B.
3) Mixing the component A prepared in the step 1) and the component B prepared in the step 2) according to the mass ratio of 6:1, uniformly stirring, and curing for 10 minutes to obtain the water-based high-temperature-resistant long-acting anticorrosive coating.
Example two
The water-based high-temperature-resistant long-acting anticorrosive paint comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 4: 1.
The component A comprises the following raw materials in parts by mass: 55 parts of water-based novolac epoxy resin; 3 parts of carbon black; 10 parts of an antirust pigment; 20 parts of extender pigment consisting of 8 parts of sericite powder, 3 parts of talcum powder and 9 parts of barium sulfate; 0.6 part of anti-settling agent; 12 parts of deionized water; 1 part of epoxy silane coupling agent; the total amount of other auxiliary agents consisting of 3 parts of dispersing agent, 0.3 part of defoaming agent, 0.4 part of wetting agent, 0.5 part of flatting agent, 1 part of flash rust inhibitor and 1.1 part of thickening agent is 6.3 parts.
The component B comprises the following raw materials in parts by mass: 80 parts of a curing agent; 20 parts of propylene glycol methyl ether.
The antirust pigment is a mixture of modified calcium phosphomolybdate and aluminum polyphosphate, and the mass ratio of the modified calcium phosphomolybdate to the aluminum polyphosphate in the mixture is 2: 1.
The anti-settling agent is refined hectorite clay.
The dispersing agent is a high molecular weight polyurethane segmented copolymer solution containing a plurality of pigment-philic groups.
The defoaming agent is an organic silicon defoaming agent.
The wetting agent is polyether modified polydimethylsiloxane copolymer.
The flatting agent is polyacrylate flatting agent.
The flash rust inhibitor is a modified zinc chelate.
The thickening agent is a polyurethane associative thickening agent.
The curing agent adopts a waterborne modified polyamine curing agent.
The preparation method of the water-based high-temperature-resistant long-acting anticorrosive paint comprises the following steps of:
1) and preparing a component A:
① grinding color paste, namely weighing 12 parts of deionized water, weighing 3 parts of dispersant, putting into a dry and clean dispersion kettle, starting a stirrer, controlling the rotating speed at 500 r/min, sequentially adding 0.3 part of defoamer, 3 parts of carbon black, 10 parts of antirust pigment, 8 parts of sericite powder, 3 parts of talcum powder, 9 parts of barium sulfate and 0.6 part of anti-settling agent, stirring for 8 minutes at 1200 r/min, and grinding to the fineness of less than 50 microns by using a sand mill after stirring uniformly to obtain the resin-free color paste.
② preparing into paint, adding 55 parts of water-borne novolac epoxy resin, 0.4 part of wetting agent, 0.5 part of flatting agent, 1 part of anti-flash rust agent, 1 part of epoxy silane coupling agent and 0.8 part of thickening agent into the resin-free color paste obtained by grinding the pulp at a stirring speed of 500 r/min in a dispersion kettle, stirring for 15 minutes at a stirring speed of 1500 r/min, and filtering by a 100-mesh filter screen to obtain the component A.
2) Preparing a component B:
weighing 80 parts of waterborne modified polyamine curing agent, putting into a dry and clean dispersion kettle, starting a stirrer, stirring at the speed of 300 r/min, adding 20 parts of propylene glycol monomethyl ether, continuously stirring for 10 minutes until fluid is uniform, and filtering by a 100-mesh filter screen to obtain the component B.
3) Mixing the component A prepared in the step 1) and the component B prepared in the step 2) according to the mass ratio of 4:1, uniformly stirring, and curing for 20 minutes to obtain the water-based high-temperature-resistant long-acting anticorrosive coating.
EXAMPLE III
The water-based high-temperature-resistant long-acting anticorrosive paint comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 5: 1.
The component A comprises the following raw materials in parts by mass: 48 parts of water-based novolac epoxy resin; 2.5 parts of carbon black; 8 parts of an antirust pigment; the total amount of extender pigment is 17 parts which is composed of 6 parts of sericite powder, 2.5 parts of talcum powder and 8.5 parts of barium sulfate; 0.5 part of anti-settling agent; 18 parts of deionized water; 0.8 part of epoxy silane coupling agent; 5 parts of other auxiliary agents which are composed of 2.5 parts of dispersing agent, 0.25 part of defoaming agent, 0.35 part of wetting agent, 0.4 part of flatting agent, 0.5 part of flash rust inhibitor and 1 part of thickening agent.
The component B comprises the following raw materials in parts by mass: 83 parts of a curing agent; propylene glycol methyl ether 17 parts.
The antirust pigment is a mixture of modified calcium phosphomolybdate and aluminum polyphosphate, and the mass ratio of the modified calcium phosphomolybdate to the aluminum polyphosphate in the mixture is 3: 1.
The anti-settling agent is refined hectorite clay.
The dispersing agent is a high molecular weight polyurethane segmented copolymer solution containing a plurality of pigment-philic groups.
The defoaming agent is an organic silicon defoaming agent.
The wetting agent is polyether modified polydimethylsiloxane copolymer.
The flatting agent is polyacrylate flatting agent.
The flash rust inhibitor is a modified zinc chelate.
The thickening agent is a polyurethane associative thickening agent.
The curing agent adopts a waterborne modified polyamine curing agent.
The preparation method of the water-based high-temperature-resistant long-acting anticorrosive paint comprises the following steps of:
1) and preparing a component A:
① grinding color paste, weighing 18 parts of deionized water, weighing 2.5 parts of dispersant, putting into a dry and clean dispersion kettle, starting a stirrer, controlling the rotating speed at 400 r/m, sequentially adding 0.25 part of defoamer, 2.5 parts of carbon black, 8 parts of anti-rust pigment, 6 parts of sericite powder, 2.5 parts of talcum powder, 8.5 parts of barium sulfate and 0.5 part of anti-settling agent, stirring for 10 minutes at 1000 r/m, and grinding to the fineness of less than 50um by using a sand mill after stirring uniformly to obtain the resin-free color paste.
② preparing into paint, adding 48 parts of water-borne novolac epoxy resin, 0.35 part of wetting agent, 0.4 part of flatting agent, 0.5 part of anti-flash rust agent, 0.8 part of epoxy silane coupling agent and 1 part of thickening agent into the resin-free color paste obtained by grinding the pulp at a stirring speed of 400 r/min in turn, stirring for 10 minutes at a stirring speed of 2000 r/min, and filtering by a 200-mesh filter screen to obtain the component A.
2) Preparing a component B:
weighing 83 parts of waterborne modified polyamine curing agent, putting the waterborne modified polyamine curing agent into a dry and clean dispersion kettle, starting a stirrer, stirring at the speed of 400 rpm, adding 17 parts of propylene glycol methyl ether, continuously stirring for 8 minutes until fluid is uniform, and filtering by a 200-mesh filter screen to obtain a component B.
3) Mixing the component A prepared in the step 1) and the component B prepared in the step 2) according to the mass ratio of 5:1, uniformly stirring, and curing for 15 minutes to obtain the water-based high-temperature-resistant long-acting anticorrosive coating.
The performance test data for the three examples above are as follows:
the performance test results show that the heat resistance, the chemical resistance, the hardness and the wear resistance of the water-based high-temperature-resistant long-acting anticorrosive coating are obviously improved, the defect that the existing water-based coating cannot simultaneously resist high temperature and long-acting corrosion is overcome, and the high temperature resistance and the corrosion resistance of the water-based high-temperature-resistant long-acting anticorrosive coating are comparable to those of a solvent-based coating. Compared with the traditional solvent type, the water-based novolac epoxy resin has the VOC release amount of less than 80g/L, is safe and environment-friendly, accords with the national green and environment-friendly development direction, avoids the generation of toxic and harmful gases and VOC of the solvent type coating, is not easy to burn and explode, is simple to construct, can replace the traditional solvent type coating, and has wide application prospect.
Claims (7)
1. The water-based high-temperature-resistant long-acting anticorrosive paint is characterized by comprising a component A and a component B, wherein the mass ratio of the component A to the component B is (4-6): 1;
the component A comprises the following raw materials in parts by mass:
42-55 parts of a film forming substance;
2-3 parts of carbon black;
5-10 parts of an anti-rust pigment;
15-20 parts of extender pigment;
0.3-0.6 part of anti-settling agent;
12-20 parts of deionized water;
0.5-1 part of epoxy silane coupling agent;
3.4-6.3 parts of other additives;
wherein the film-forming substance is water-based novolac epoxy resin; the extender pigment comprises 5-8 parts of sericite powder;
the component B comprises the following raw materials in parts by mass:
80-90 parts of a curing agent;
10-20 parts of propylene glycol methyl ether.
2. The water-based high-temperature-resistant long-acting anticorrosive paint according to claim 1, characterized in that the antirust pigment is a mixture of modified calcium phosphomolybdate and aluminum polyphosphate, and the mass ratio of the two in the mixture is 3 (1-2).
3. The water-based high-temperature-resistant long-acting anticorrosive paint according to claim 1, characterized in that the extender pigment further comprises 2-3 parts of talcum powder and 8-9 parts of barium sulfate.
4. The water-based high-temperature-resistant long-acting anticorrosive paint according to claim 1, characterized in that the anti-settling agent is refined hectorite clay.
5. The water-based high-temperature-resistant long-acting anticorrosive paint as claimed in claim 1, wherein the other auxiliary agents comprise a dispersant, a defoamer, a wetting agent, a leveling agent, an anti-flash rust agent and a thickener;
the dispersing agent is a high molecular weight polyurethane segmented copolymer solution containing a plurality of pigment-philic groups, and the mass part of the dispersing agent is 1.5-3 parts;
the defoaming agent is an organic silicon defoaming agent, and the mass part of the defoaming agent is 0.2-0.3 part;
the wetting agent is polyether modified polydimethylsiloxane copolymer, and the mass portion of the wetting agent is 0.3-0.4 portion;
the leveling agent is polyacrylate and accounts for 0.3-0.5 parts by weight;
the anti-flash rust agent is a modified zinc chelate, and the mass part of the anti-flash rust agent is 0.3-1 part;
the thickening agent is a polyurethane associated thickening agent, and the mass portion of the thickening agent is 0.8-1.1.
6. The water-based high-temperature-resistant long-acting anticorrosive paint as claimed in claim 1, wherein the curing agent is a water-based modified polyamine curing agent.
7. A preparation method of a water-based high-temperature-resistant long-acting anticorrosive paint is characterized by comprising the following steps of:
1) and preparing a component A:
① sanding color paste, namely weighing 12-20 parts of deionized water, weighing 1.5-3 parts of dispersing agent, putting into a dry and clean dispersing kettle, starting a stirrer, controlling the rotating speed to be 300-500 r/min, sequentially adding 0.2-0.3 part of defoaming agent, 2-3 parts of carbon black, 5-10 parts of antirust pigment, 5-8 parts of sericite powder in extender pigment, 10-12 parts of residual extender pigment and 0.3-0.6 part of anti-settling agent, stirring for 8-15 minutes at the speed of 800-1200 r/min, uniformly stirring, and grinding to below 50um by using a sand mill to obtain resin-free color paste;
②, preparing a paint, namely adding 42-55 parts of water-based phenolic epoxy resin, 0.3-0.4 part of wetting agent, 0.3-0.5 part of flatting agent, 0.3-1 part of anti-flash rust agent, 0.5-1 part of epoxy silane coupling agent and 0.8-1.1 part of thickening agent into the obtained resin-free color paste in a dispersion kettle at a stirring speed of 300-500 rpm in sequence, stirring for 10-20 minutes at a speed of 1000-2000 rpm, and filtering by a 100-200-mesh filter screen to obtain a component A;
2) preparing a component B:
weighing 80-90 parts of water-based modified polyamine curing agent, putting the water-based modified polyamine curing agent into a dry and clean dispersing kettle, starting a stirrer, stirring at the speed of 300-500 rpm, adding 10-20 parts of propylene glycol monomethyl ether, continuously stirring for 5-10 minutes until the mixture is uniform, and filtering with a 100-200-mesh filter screen to obtain a component B;
3) mixing the component A prepared in the step 1) and the component B prepared in the step 2) according to the mass ratio of (4-6) to 1, uniformly stirring, and curing for 10-20 minutes to obtain the water-based high-temperature-resistant long-acting anticorrosive paint.
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| CN201911139572.7A CN110922855A (en) | 2019-11-21 | 2019-11-21 | Water-based high-temperature-resistant long-acting anticorrosive paint and preparation method thereof |
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| CN201911139572.7A CN110922855A (en) | 2019-11-21 | 2019-11-21 | Water-based high-temperature-resistant long-acting anticorrosive paint and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112375451A (en) * | 2020-12-10 | 2021-02-19 | 无锡市太湖防腐材料有限公司 | Low-film-thickness high-performance water-based single-component anticorrosive paint and preparation method thereof |
| CN112625554A (en) * | 2020-12-17 | 2021-04-09 | 重庆海联水性涂料有限公司 | Water-based double-component environment-friendly insulating anticorrosive paint for inner wall of transformer and preparation method thereof |
| CN113845818A (en) * | 2021-09-30 | 2021-12-28 | 无锡普天铁心股份有限公司 | Water-based heavy-duty anticorrosive paint and preparation method and application thereof |
| CN114561146A (en) * | 2021-12-28 | 2022-05-31 | 无锡华东锌盾科技有限公司 | Water-based high-temperature-resistant coating for steel surface and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112375451A (en) * | 2020-12-10 | 2021-02-19 | 无锡市太湖防腐材料有限公司 | Low-film-thickness high-performance water-based single-component anticorrosive paint and preparation method thereof |
| CN112625554A (en) * | 2020-12-17 | 2021-04-09 | 重庆海联水性涂料有限公司 | Water-based double-component environment-friendly insulating anticorrosive paint for inner wall of transformer and preparation method thereof |
| CN113845818A (en) * | 2021-09-30 | 2021-12-28 | 无锡普天铁心股份有限公司 | Water-based heavy-duty anticorrosive paint and preparation method and application thereof |
| CN114561146A (en) * | 2021-12-28 | 2022-05-31 | 无锡华东锌盾科技有限公司 | Water-based high-temperature-resistant coating for steel surface and preparation method thereof |
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