CN110551451B - Water-based bi-component epoxy asphalt coating and preparation method thereof - Google Patents
Water-based bi-component epoxy asphalt coating and preparation method thereof Download PDFInfo
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- CN110551451B CN110551451B CN201910743997.2A CN201910743997A CN110551451B CN 110551451 B CN110551451 B CN 110551451B CN 201910743997 A CN201910743997 A CN 201910743997A CN 110551451 B CN110551451 B CN 110551451B
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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
- C09D195/00—Coating compositions based on bituminous materials, e.g. asphalt, tar, pitch
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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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- 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
- C09D7/20—Diluents or solvents
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- 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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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3045—Sulfates
Abstract
The invention discloses a water-based bi-component epoxy asphalt coating, which comprises a component A and a component B, wherein the component A comprises the following components in parts by weight: the water-based epoxy emulsion paint comprises a water-based epoxy emulsion, a dispersing agent, a wetting agent, a defoaming agent, a filler, a film-forming assistant, a rheological assistant and deionized water, wherein the component B comprises the following components in parts by weight: epoxy curing agents and emulsified asphalt. The coating uses water as a diluent, uses emulsified asphalt and waterborne epoxy resin as main film forming substances, optimizes the formula of the coating, and respectively puts the emulsified asphalt and the waterborne epoxy resin into two components, so that the coating is environment-friendly and nontoxic, has strong corrosion resistance, good storage stability, fine texture, good drying property, can be used for spraying, and can adapt to the rapid production rhythm of a coating construction site. The invention also discloses a preparation method of the aqueous bi-component epoxy asphalt coating, which has the advantages of simple production process, strong operability, no need of special equipment, suitability for large-scale production and stable and reliable performance of the obtained product.
Description
Technical Field
The invention belongs to the technical field of water-based paint, and particularly relates to a water-based bi-component epoxy asphalt paint and a preparation method thereof.
Background
The traditional oily epoxy asphalt coating can stand the severe environments of alternation of dry and wet, dark and moist, water immersion and the like for a long time, and is widely applied to petrochemical storage tank bottom plates and buried pipelines. However, oily products and their diluents contain a large amount of volatile organic compounds, which can cause serious environmental pollution and directly harm the personal safety of workers. In recent years, various environmental regulations strengthen guidance and regulation of various industries, the water-based paint is rapidly developed, and customers of paint products in various fields gradually promote a agenda of changing oil into water.
Compared with solvent-based paint, the water-based paint overcomes the defects of toxicity, flammability and explosiveness, is nontoxic and tasteless, is safe and environment-friendly, saves resources, and reduces the production cost. In addition, the solvent type epoxy asphalt coating is produced by firstly mixing epoxy resin and asphalt into a component A and then mixing the component A with a component B containing an epoxy curing agent for use during construction. As the traditional solvent type epoxy asphalt coating does not have the problem of electric property of emulsion particles, the solvent type epoxy asphalt coating product produced by the process has no problem of storage stability. However, most of the existing aqueous epoxy emulsions are nonionic emulsified systems, and most of the emulsified asphalt is anionic emulsified asphalt or cationic emulsified asphalt. If the production process of the original solvent type epoxy asphalt coating product is used, the problems of unstable performance and quality of the constructed epoxy asphalt, difficulty in construction and the like can be caused by the risks of instability and even emulsion breaking of the product caused by the difference of the electrical properties of emulsion particles and high storage stability risk. Therefore, the market needs a water-based two-component epoxy asphalt paint with good storage stability, reliable performance and convenient construction to replace the traditional oil-based epoxy asphalt paint.
Disclosure of Invention
In order to overcome the defects of the prior art, one of the purposes of the invention is to provide the water-based bi-component epoxy asphalt coating, water is used as a diluent, the coating formula is optimized, and emulsified asphalt and water-based epoxy resin are respectively put into two components, so that the coating has the advantages of environmental protection, high efficiency, strong corrosion resistance, fine texture, good storage stability, good drying performance and the like, can be used for spraying, and can adapt to the rapid production rhythm of a coating construction site.
The second purpose of the invention is to provide a preparation method of the waterborne double-component epoxy asphalt coating, which has the advantages of simple production process, strong operability, no need of long-time storage, no need of special equipment, suitability for large-scale production and stable and reliable performance of the obtained product.
One of the purposes of the invention is realized by adopting the following technical scheme:
a water-based double-component epoxy asphalt coating comprises a component A and a component B,
wherein the component A comprises the following components in parts by weight: 5-20 parts of water-based epoxy emulsion, 0.3-0.6 part of dispersant, 0.1-0.2 part of wetting agent, 0.5-1 part of defoaming agent, 20-30 parts of filler, 0.2-0.6 part of film-forming assistant, 0.2-0.4 part of rheological assistant and 8-12 parts of deionized water;
the component B comprises the following components in parts by weight: 1-8 parts of epoxy curing agent and 35-50 parts of emulsified asphalt.
Further, the aqueous epoxy emulsion is any one or two of external emulsification type nonionic epoxy emulsion or self-emulsification type epoxy emulsion; the epoxy curing agent is an amine curing agent;
preferably, the aqueous epoxy emulsion is selected from one or more of PZ 3961-1 of Hensmei, BANCO 2056 of Huangshan Pont and synthetic materials Co., Ltd, and E-Pos 1011W55 of QR-Polymers Co., Netherlands.
Preferably, the amine is selected from any one or more of 3986 of Hensmei, BANCO 905 of Nippon Mount and synthetic materials Co., Ltd, and Q-RIT 1061 or Q-RIT 1071 of QR-Polymers in the Netherlands.
Further, the emulsified asphalt is any one of anionic emulsified asphalt or nonionic emulsified asphalt;
preferably, the emulsified asphalt is any one of emulsified asphalt produced by Hangzhou Rich new materials, Jiangmen City strong highway materials and Zhanjiang Yongxing pavement materials technology.
Further, the rheological additive is one or two of nonionic hydrophobic modified polyurethane and anionic crosslinking type high polymer emulsion; the film forming auxiliary agent is selected from any one or a combination of more of propylene glycol butyl ether, dipropylene glycol butyl ether, propylene glycol phenyl ether and dodecyl alcohol ester; the filler is selected from any one or a combination of several of heavy calcium carbonate powder, talcum powder and barite powder;
preferably, the nonionic hydrophobic modified polyurethane is selected from one or two of Dow type RM-8W or RM-12W; the anion cross-linking type macromolecule emulsion is type of Dow corporation ASE-60.
Further, the wetting agent is a nonionic surfactant; the defoaming agent is any one or the combination of two of polyether siloxane copolymer and mineral oil defoaming agent;
preferably, the nonionic surfactant is selected from any one or a combination of several of Surfynol-104 wetting agent manufactured by American air chemical industry, TRITON X-405 wetting agent manufactured by Dow company and Hydropalat-140 wetting agent manufactured by Germany Corning company; the polyether siloxane copolymer is selected from any one or a combination of two of Digao company model numbers Foamex 840 and Foamex 1488; the mineral oil antifoaming agent is selected from any one or two of the Digao company model numbers Foamex K3 and Foamex K7.
Further, the dispersing agent is any one or the combination of two of ammonium salt solution and sodium salt solution of acrylate copolymer;
preferably, the dispersant is selected from any one or combination of more of BYK-154, DISPERBYK-191 and DISPERBYK-192.
The second purpose of the invention is realized by adopting the following technical scheme:
a preparation method of a water-based two-component epoxy asphalt coating comprises the following steps:
preparation of component A slurry: taking deionized water with the formula amount, placing the deionized water in a dispersion machine, stirring at a uniform speed, sequentially adding a wetting agent, a dispersing agent, 1/2 antifoaming agent with the formula amount and a filler, increasing the stirring speed, and continuing stirring for 30-60 min; stopping stirring when the fineness of the slurry is less than or equal to 50 mu m, and filtering and discharging the obtained slurry through a 100-mesh filter screen to obtain the component A slurry;
preparing component A finished paint: taking the aqueous epoxy emulsion and the component A slurry according to the formula amount, placing the aqueous epoxy emulsion and the component A slurry into a dispersion machine, stirring at a uniform speed, sequentially adding the defoamer, the film forming aid and the rheological aid according to the formula amount of 1/2, increasing the stirring speed, continuing stirring for 30-50min, filtering by a 100-mesh filter screen, and discharging to obtain a component A finished paint;
preparation of the B component: taking the emulsified asphalt with the formula amount, placing the emulsified asphalt in a dispersion machine for uniform stirring, then adding the epoxy curing agent with the formula amount, increasing the stirring speed, continuing stirring for 30-60min, filtering by a 100-mesh filter screen, and discharging to obtain the component B.
Preferably, in the preparation of the component A slurry, after all the components are added, the stirring speed is 1000-1500 r/min; in the preparation of the component A finished paint, after all the components are added, the stirring speed is 400-650 r/min; in the preparation of the component B, after all the components are added, the stirring speed is 600-700 r/min.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, the waterborne epoxy resin and the emulsified asphalt are respectively placed in the two components, so that the instability risk caused by the difference of the electric properties of emulsion particles of the two emulsions in the same component is reduced, the risk in the aspect of the storage stability of the product is further reduced, the storage stability is better, and the product can be stored for a long time without thickening.
2. Compared with the traditional solvent type epoxy coal asphalt coating, the water-based bi-component epoxy asphalt paint takes the emulsified asphalt and the water-based epoxy resin as main film forming substances and takes water as a diluent, and has the remarkable advantages of low Volatile Organic Compound (VOC), high construction safety and the like. The product of the invention is not interfered by electric sparks, can be continuously constructed and cross-operated under the condition of fire, greatly improves the construction efficiency of the coating site of a petrochemical project, and also greatly improves the convenience of later maintenance.
3. The coating has the advantages that the reasonable formula is adopted, the anti-corrosion performance and the anti-sagging performance of the coating are improved by optimizing the fillers and the additives, the product is fine and smooth in texture, can be used for spraying, has reliable constructability, and can meet the requirement of fast-paced production beats on the coating construction site of a petrochemical project; the drying performance of the coating is improved by screening the auxiliary additive, and the coating can be constructed and formed into a film under a low-temperature and high-humidity environment so as to meet the requirements of a petrochemical project coating construction site.
4. The product of the invention has simple preparation process and strong operability, does not need to be stored for a long time, does not need special equipment, is suitable for large-scale production, and has stable and reliable performance.
Drawings
FIG. 1 is a graph showing the results of the sag resistance test on the samples of example 1 of the present invention;
FIG. 2 is a graph showing the results of the sag resistance test on the sample of example 2 according to the present invention;
FIG. 3 is a graph showing the results of the sag resistance test on the samples of example 3 according to the present invention;
FIG. 4 is a graph showing the results of the neutral salt spray resistance test on the samples in example 1 of the present invention;
FIG. 5 is a graph showing the results of the neutral salt spray resistance test on the samples in example 2 of the present invention;
FIG. 6 is a graph showing the results of the neutral salt spray resistance test of the sample of example 3 according to the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that any combination of the embodiments or technical features described below can be used to form a new embodiment without conflict.
In the present invention, all parts and percentages are by weight, and the equipment and materials used are commercially available or commonly used in the art, unless otherwise specified. The methods in the following examples are conventional in the art unless otherwise specified.
A water-based two-component epoxy asphalt coating comprises a component A and a component B in parts by weight,
wherein, the component A comprises: 5-20 parts of water-based epoxy emulsion, 0.3-0.6 part of dispersant, 0.1-0.2 part of wetting agent, 0.5-1 part of defoaming agent, 20-30 parts of filler, 0.2-0.6 part of film-forming assistant, 0.2-0.4 part of rheological assistant and 8-12 parts of deionized water;
wherein the component B comprises: 1-8 parts of epoxy curing agent and 35-50 parts of emulsified asphalt.
The excellent water vapor sealing performance of the emulsified asphalt provides reliable protection for a storage tank bottom plate and a buried pipeline, and the crosslinking curing property of the water-based epoxy emulsion further enhances the compactness of a paint film and improves the corrosion resistance of the paint film. Not only retains the high adhesion, high hardness, excellent corrosion resistance and the like of the waterborne epoxy resin, but also overcomes the defects of poor flexibility, impact strength and water resistance due to the addition of the asphalt.
In addition, most of the existing aqueous epoxy emulsions are nonionic emulsification systems, most of the emulsified asphalt is anionic emulsified asphalt or cationic emulsified asphalt, and the two emulsions have the risk of instability and even emulsion breaking caused by the difference of the electrical properties of emulsion particles in the same component. The epoxy asphalt coating of the embodiment puts the emulsified asphalt and the waterborne epoxy resin in two components respectively, so that the risk of instability caused by the difference of the electrical properties of emulsion particles due to the two emulsions in the same component is reduced, and the storage stability of the product is better.
More preferably, the water-based epoxy emulsion is one or two of external emulsion type nonionic epoxy emulsion or self-emulsion type epoxy emulsion, and is selected from one or a combination of more of PZ 3961-1 of Hensmei company, BANCO 2056 of Huangshan Pont and synthetic materials Co., Ltd, or E-Pos 1011W55 of QR-Polymers Co., Netherlands; the epoxy curing agent is amine curing agent, and is selected from any one or a combination of more of 3986 of Hounsfield, waterborne epoxy curing agent BANCO 905 of Huangshan Banbang and synthetic materials Limited, and Q-RIT 1061 or Q-RIT 1071 of Dutch QR-Polymers.
The selected water-based epoxy emulsion has good comprehensive performance, and the coating prepared by combining the water-based epoxy emulsion with the epoxy curing agent has quick drying time and curing speed, good adhesive force, flexibility and corrosion resistance. The selected epoxy curing agent is an amine curing agent, is dissolved in water without any solvent, shows excellent curing speed, adhesive force and waterproof and corrosion-resistant performance, and has longer gel time (as long as 8 hours) and shorter curing time; at curing temperatures in excess of 10 ℃, the clear or pigmented coatings exhibit excellent mechanical properties and anti-corrosion characteristics.
More preferably, the emulsified asphalt is any one of anionic emulsified asphalt and nonionic emulsified asphalt, and is selected from any one of emulsified asphalt produced by hangzhou richly new materials ltd, jiangmen strong highway materials ltd, and zhanjiang nixing road materials ltd.
As a further preferable scheme, the rheological additive is one or two of nonionic hydrophobic modified polyurethane and anionic crosslinking type high polymer emulsion, and is selected from one or a combination of several of thickeners of which the type is RM-8W, RM-12W, ASE-60 from the Dow company; the film forming auxiliary agent is selected from any one or a combination of more of propylene glycol butyl ether, dipropylene glycol butyl ether, propylene glycol phenyl ether and dodecyl alcohol ester; the filler is selected from any one or a combination of several of heavy calcium carbonate powder, talcum powder and barite powder; the wetting agent is a nonionic surfactant and is selected from any one or a combination of a Surfynol-104 wetting agent produced by American air chemical industry, a TRITON X-405 wetting agent produced by Dow company and a Hydropalat-140 wetting agent produced by Germany Corning company; the defoaming agent is any one or the combination of two of polyether siloxane copolymer and mineral oil defoaming agent, and is selected from any one or the combination of several of Foamex 840, Foamex 1488, Foamex K3 and Foamex K7 defoaming agents of Digao company; the dispersing agent is any one or the combination of two of ammonium salt solution and sodium salt solution of acrylate copolymer, and is selected from any one or the combination of BYK-154, DISPERBYK-191 and DISPERBYK-192.
The dispersant is used to reduce the time required for the milling process and to stabilize the dispersion of the coating, wherein DISPERBYK-191, DISPERBYK-192 are VOC and solvent free wetting dispersants to deflocculate the coating by steric stabilization of the coating. It imparts a charge to the coating, thus avoiding flocculation of the coating without the same charge. Furthermore, the deflocculated coating has a small particle size, so that high gloss is achieved, the tinting strength is improved, and additionally the transparency and hiding power are increased. The aid reduces viscosity and improves leveling.
The invention also provides a preparation method of the waterborne two-component epoxy asphalt coating, which comprises the following steps:
the preparation method of the component A slurry comprises the following steps: taking deionized water with the formula amount, placing the deionized water in a dispersion machine for stirring at the uniform speed of 400r/min, sequentially adding a wetting agent, a dispersing agent, 1/2 antifoaming agent with the formula amount and a filler, increasing the stirring speed, and continuing stirring at the rotation speed of 1000-; measuring the fineness of the slurry, stopping stirring when the fineness of the slurry is less than or equal to 50 mu m, filtering the obtained slurry by a 100-mesh filter screen, and discharging to obtain the slurry of the component A;
the preparation method of the component A finished paint comprises the following steps: taking the aqueous epoxy emulsion and the component A slurry according to the formula amount, placing the aqueous epoxy emulsion and the component A slurry into a dispersion machine, uniformly stirring at a speed of 400r/min, sequentially adding the remaining 1/2 antifoaming agent, film forming aid and rheological aid according to the formula amount, increasing the stirring speed, continuously stirring at a speed of 400-650r/min for 30-50min, filtering by a 100-mesh filter screen, and discharging to obtain the component A finished paint;
b component preparation: taking the emulsified asphalt with the formula amount, placing the emulsified asphalt in a dispersion machine for stirring at the uniform speed of 400r/min, then adding the epoxy curing agent with the formula amount, increasing the stirring speed, continuing stirring at the rotating speed of 600-700r/min for 30-60min, filtering by a 100-mesh filter screen, and discharging to obtain the component B.
The following are specific examples of the present invention, and raw materials, equipments and the like used in the following examples can be obtained by purchasing them unless otherwise specified.
Examples 1 to 3:
the raw materials are weighed according to the mixture ratio in the following table 1 respectively, and the product is prepared according to the steps in the examples 1-3, and the details are shown in the table 1:
table 1: EXAMPLES 1-3 raw material proportioning Table
The preparation of examples 1-3 was as follows:
example 1:
taking 10 parts of deionized water, stirring at a uniform speed of 400r/min by a dispersion machine, sequentially adding 0.1 part of BYK-154, 0.2 part of Surfynol-104, 0.5 part of Foamex 840, 18 parts of heavy calcium carbonate powder and 7 parts of talcum powder, and stirring at a rotating speed of 1200r/min for about 45 min; measuring the fineness of the slurry, stopping stirring when the fineness of the slurry is less than or equal to 50 mu m, filtering the obtained slurry by a 100-mesh filter screen, and discharging to obtain the slurry of the component A for later use;
15 parts of PZ 3961-1 and the component A slurry are stirred at the uniform speed of 400r/min, and 0.3 part of Foamex K3, 0.2 part of propylene glycol butyl ether, 0.2 part of RM-8W and 0.2 part of RM-12W are sequentially added. Stirring at 550r/min for 40min, filtering with 100 mesh sieve, discharging, and packaging;
taking 40 parts of emulsified asphalt produced by Hangzhou Richardmaterials Co., Ltd, stirring at a uniform speed of 400r/min, adding 4 parts of 3986 epoxy curing agent, stirring at a rotating speed of 650r/min for about 45min, filtering by a 100-mesh filter screen, discharging and packaging.
Example 2:
taking 8 parts of deionized water, stirring at a uniform speed of 400r/min by a dispersion machine, sequentially adding 0.3 part of DISPERBYK-191, 0.5 part of TRITON X-405, 0.5 part of Foamex 1488, 16 parts of silicon micropowder and 4 parts of barite powder, and stirring at a rotating speed of 1000r/min for about 60 min; measuring the fineness of the slurry, stopping stirring when the fineness of the slurry is less than or equal to 50 mu m, filtering the obtained slurry by a 100-mesh filter screen, and discharging to obtain the slurry of the component A for later use;
taking 5 parts of BANCO 2056 and the component A slurry, stirring at the uniform speed of 400r/min, sequentially adding 0.5 part of Foamex K3, 0.4 part of propylene glycol phenyl ether and 0.3 part of RM-12W, stirring at 400r/min for 60min, filtering by a 100-mesh filter screen, discharging and packaging;
taking 50 parts of emulsified asphalt produced by Jiangmen strong highway materials Co., Ltd, stirring at a uniform speed of 400r/min, adding 1 part of BANCO 905 epoxy curing agent, stirring at a rotating speed of 600r/min for about 60min, filtering by a 100-mesh filter screen, discharging and packaging.
Example 3:
taking 12 parts of deionized water, stirring at a uniform speed of 400r/min by a dispersion machine, sequentially adding 0.5 part of DISPERBYK-192, 0.1 part of Hydropalat-140, 0.3 part of Foamex 840, 18 parts of talcum powder and 12 parts of quartz powder, and stirring at a rotating speed of 1500r/min for about 30 min; measuring the fineness of the slurry, stopping stirring when the fineness of the slurry is less than or equal to 50 mu m, filtering the obtained slurry by a 100-mesh filter screen, and discharging to obtain the slurry of the component A for later use;
20 parts of E-Pos 1011W55 and the component A slurry are taken, stirred at the uniform speed of 400r/min, and then 0.2 part of Foamex K7, 0.6 part of dodecanol ester and 0.2 part of ASE-60 are sequentially added. Stirring at 650r/min for 30min, filtering with 100 mesh filter screen, discharging, and packaging;
taking 35 parts of emulsified asphalt produced by Zhanjiang Yongxing pavement materials science and technology Co., Ltd, stirring at the uniform speed of 400r/min, adding 8 parts of Q-RIT 1061 epoxy curing agent, stirring at the rotating speed of 700r/min for about 30min, filtering by a 100-mesh filter screen, discharging, and packaging.
Comparative examples 1 to 2
The raw materials are weighed according to the mixture ratio in the following table 2 respectively, and the product is prepared according to the steps in the comparative examples 1-2, and the details are shown in the table 2:
table 2: comparative examples 1-2 raw material proportioning table
The preparation method of comparative examples 1-2 is as follows:
comparative example 1
Taking 10 parts of deionized water, stirring at a uniform speed of 400r/min by a dispersion machine, sequentially adding 0.1 part of BYK-154, 0.2 part of Surfynol-104, 0.5 part of Foamex 840, 18 parts of heavy calcium carbonate powder and 7 parts of talcum powder, and stirring at a rotating speed of 1200r/min for about 45 min; measuring the fineness of the slurry, stopping stirring when the fineness of the slurry is less than or equal to 50 mu m, filtering the obtained slurry by a 100-mesh filter screen, and discharging to obtain the slurry of the component A for later use;
taking 15 parts of PZ 3961-1, 40 parts of emulsified asphalt produced by Hangzhou Richardmaterials Co., Ltd and the component A slurry, stirring at the uniform speed of 400r/min, and sequentially adding 0.2 part of RM-8W and 0.2 part of RM-12W; stirring at 550r/min for 40min, filtering with 100 mesh sieve, discharging, and packaging;
stirring 4 parts of 3986 epoxy curing agent, 0.3 part of Foamex K3 and 0.2 part of propylene glycol butyl ether at the rotating speed of 650r/min for about 45min, filtering by a 100-mesh filter screen, discharging and packaging.
Comparative example 2:
taking 8 parts of deionized water, stirring at a uniform speed of 400r/min by a dispersion machine, sequentially adding 0.3 part of DISPERBYK-191, 0.5 part of TRITON X-405, 0.5 part of Foamex 1488, 16 parts of silicon micropowder and 4 parts of barite powder, and stirring at a rotating speed of 1000r/min for about 60 min; measuring the fineness of the slurry, stopping stirring when the fineness of the slurry is less than or equal to 50 mu m, filtering the obtained slurry by a 100-mesh filter screen, and discharging to obtain the slurry of the component A for later use;
taking 5 parts of BANCO 2056, 50 parts of emulsified asphalt produced by Jiangmen strong highway materials GmbH and the component A slurry, stirring at the uniform speed of 400r/min, sequentially adding 0.3 part of RM-12W, stirring at 400r/min for 60min, filtering by a 100-mesh filter screen, discharging and packaging;
taking 1 part of BANCO 905 epoxy curing agent, 0.5 part of Foamex K3 and 0.4 part of propylene glycol phenyl ether, stirring at the rotating speed of 600r/min for about 60min, filtering by a 100-mesh filter screen, discharging and packaging.
Effect evaluation and Performance detection
The aqueous two-component epoxy asphalt coating products of examples 1 to 3 and comparative examples 1 to 2 were produced and packaged and then left to stand for 1 month. Test panels were prepared by spray coating. The resulting panels were tested according to the following table 3, with the results shown in table 4.
TABLE 3 test items and test standards for the products
| Item | Test method |
| Viscosity/ku | GB/T9269-1988 |
| Fineness/. mu.m | GB/T1724-1979(1989) |
| Accelerated storage stability 50 ℃ (30d) | GB/T6753.3-1986 |
| Volatile organic Compound content | GB/T23986-2009 |
| Drying Property/h | GB/T1728-1979(1989) |
| Sag resistance/mum | GB/T9264-2012 |
| Neutral salt fog resistance | GB/T1771-2007 |
| Resistance to 10% H2SO4 | GB/T9274-1988 |
| Resisting boiling water at 98 deg.C | GB/T1733 + 1993 method |
| Matching property of finishing coat | - |
TABLE 4 results of product Performance test of examples 1-3 and comparative examples 1-2
It is noted that comparative example 1 shows the phenomenon of stirring and demulsification when the emulsified asphalt is added to the slurry of the epoxy-containing emulsion previously mixed during the production of the component a. Thus, no relevant test data was obtained for comparative example 1.
As shown by the data in table 4, the thickness of the sag resistance of each of the examples of the present invention reached 1075 μm (as shown in fig. 1-3); in addition, the coating of each embodiment of the invention has good storage stability, no coarse reaction at 50 ℃ (30 days) of accelerated storage stability and excellent drying performance. The performance solves the problem that the water paint product is easy to sag when being thickly coated, meets the requirement of spraying construction, ensures that the coating can be constructed in a low-temperature and high-humidity environment, and improves the application range of the product. Compared with the oily epoxy coal asphalt paint product widely used in the market at present, the volatile organic compound content of the paint provided by the invention is reduced by orders of magnitude. The test results of comparative examples 1-2 demonstrate that the product of the present invention has superior storage stability compared to conventional products in which the aqueous epoxy resin and the emulsified asphalt are pre-mixed in the component A.
As shown in FIGS. 4 to 6, the neutral salt spray resistance of the coating of the invention is excellent, and when the dry film thickness of the coating is 100 μm, no foaming and rusting can be achieved in 1000h in each example.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are within the scope of the present invention claimed in the present invention.
Claims (8)
1. The water-based bi-component epoxy asphalt coating consists of a component A and a component B, and is characterized in that:
the component A comprises the following components in parts by weight: 5-20 parts of water-based epoxy emulsion, 0.3-0.6 part of dispersant, 0.1-0.2 part of wetting agent, 0.5-1 part of defoaming agent, 20-30 parts of filler, 0.2-0.6 part of film-forming assistant, 0.2-0.4 part of rheological assistant and 8-12 parts of deionized water;
the component B comprises the following components in parts by weight: 1-8 parts of epoxy curing agent and 35-50 parts of emulsified asphalt;
the water-based epoxy emulsion is any one or two of external emulsification type nonionic epoxy emulsion or self-emulsification type epoxy emulsion; the epoxy curing agent is an amine curing agent;
the emulsified asphalt is any one of anionic emulsified asphalt or nonionic emulsified asphalt.
2. The aqueous two-component epoxy asphalt coating of claim 1, characterized in that: the water-based epoxy emulsion is selected from one or a combination of more of PZ 3961-1 of Hensmei company, BANCO 2056 of Huangshan Pont and synthetic material company Limited or E-Pos 1011W55 of Netherlands QR-Polymers company.
3. The aqueous two-component epoxy asphalt coating of claim 1, characterized in that: the amine curing agent is selected from any one or a combination of more of 3986 of Hensmai company, water-based epoxy curing agent BANCO 905 of Huangshan Banbang and synthetic materials Co., Ltd, and Q-RIT 1061 or Q-RIT 1071 of QR-Polymers Co., Netherlands.
4. The aqueous two-component epoxy asphalt coating of claim 1, characterized in that:
the rheological additive is one or the combination of two of nonionic hydrophobic modified polyurethane and anionic crosslinking type high molecular emulsion;
the film forming auxiliary agent is selected from any one or a combination of more of propylene glycol butyl ether, dipropylene glycol butyl ether, propylene glycol phenyl ether and dodecyl alcohol ester;
the filler is selected from any one or a combination of several of heavy calcium carbonate powder, talcum powder and barite powder.
5. The aqueous two-component epoxy asphalt coating of claim 1, characterized in that:
the wetting agent is a nonionic surfactant; the defoaming agent is any one or the combination of two of polyether siloxane copolymer and mineral oil defoaming agent.
6. The aqueous two-component epoxy asphalt coating of claim 1, characterized in that:
the dispersing agent is any one or the combination of two of ammonium salt solution and sodium salt solution of acrylate copolymer, and is selected from any one or the combination of BYK-154, DISPERBYK-191 and DISPERBYK-192.
7. A process for preparing an aqueous two-component epoxy asphalt coating according to any of claims 1 to 6, characterized in that it comprises:
preparation of component A slurry: taking deionized water with the formula amount, placing the deionized water in a dispersion machine, stirring at a uniform speed, sequentially adding a wetting agent, a dispersing agent, 1/2 antifoaming agent with the formula amount and a filler, increasing the stirring speed, and continuing stirring for 30-60 min; stopping stirring when the fineness of the slurry is less than or equal to 50 mu m, and filtering and discharging the obtained slurry through a 100-mesh filter screen to obtain the component A slurry;
preparing component A finished paint: taking the aqueous epoxy emulsion and the component A slurry according to the formula amount, placing the aqueous epoxy emulsion and the component A slurry into a dispersion machine, stirring at a uniform speed, sequentially adding the defoamer, the film forming aid and the rheological aid according to the formula amount of 1/2, increasing the stirring speed, continuing stirring for 30-50min, filtering by a 100-mesh filter screen, and discharging to obtain a component A finished paint;
preparation of the B component: taking the emulsified asphalt with the formula amount, placing the emulsified asphalt in a dispersion machine for uniform stirring, then adding the epoxy curing agent with the formula amount, increasing the stirring speed, continuing stirring for 30-60min, filtering by a 100-mesh filter screen, and discharging to obtain the component B.
8. The method of preparing an aqueous two-component epoxy asphalt coating according to claim 7, characterized in that: in the preparation of the component A slurry, after all the components are added, the stirring speed is 1000-1500 r/min; in the preparation of the component A finished paint, after all the components are added, the stirring speed is 400-650 r/min; in the preparation of the component B, after all the components are added, the stirring speed is 600-700 r/min.
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| CN112126315A (en) * | 2020-09-27 | 2020-12-25 | 宜兴市华夏化工材料有限公司 | Two-component water-based epoxy carbon-based coating and preparation method thereof |
| CN112745766B (en) * | 2021-01-19 | 2022-04-01 | 浙江欣苗化工有限公司 | Outdoor floor bi-component water-based asphalt anticorrosive paint and preparation method thereof |
| CN116426218A (en) * | 2023-03-30 | 2023-07-14 | 铁科创恒新材料科技有限公司 | Water-based epoxy emulsified asphalt coating and preparation method thereof |
| CN116376442A (en) * | 2023-04-21 | 2023-07-04 | 安徽富瑞雪化工科技股份有限公司 | Seepage-proof building coating and preparation process thereof |
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