CN113355010B - Super-smooth energy-saving coating material for water pump and preparation method thereof - Google Patents
Super-smooth energy-saving coating material for water pump and preparation method thereof Download PDFInfo
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- CN113355010B CN113355010B CN202110614786.6A CN202110614786A CN113355010B CN 113355010 B CN113355010 B CN 113355010B CN 202110614786 A CN202110614786 A CN 202110614786A CN 113355010 B CN113355010 B CN 113355010B
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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
- C09D163/10—Epoxy resins modified by unsaturated compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/002—Pretreatement
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/14—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to metal, e.g. car bodies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/52—Two layers
- B05D7/54—No clear coat specified
- B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/5006—Amines aliphatic
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- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
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- 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
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- 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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- 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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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2202/00—Metallic substrate
- B05D2202/10—Metallic substrate based on Fe
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- 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
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2205/00—Polymer mixtures characterised by other features
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P20/10—Process efficiency
Abstract
The invention discloses an ultra-smooth energy-saving coating material for a water pump and a preparation method thereof, wherein the ultra-smooth energy-saving coating material comprises a primer coating and a surface coating, and the primer coating comprises 35-60 parts by weight of epoxy acrylate resin, 15-30 parts by weight of polydimethylsiloxane, 10-20 parts by weight of polyurethane, 2-10 parts by weight of hexagonal boron nitride, 2-6 parts by weight of a curing agent, 0.5-2 parts by weight of a defoaming agent and 3-10 parts by weight of a coupling agent; the surface coating comprises 40-70 parts of epoxy resin, 5-15 parts of polyamide imide, 2-10 parts of polytetrafluoroethylene, 2-6 parts of titanium nitride, 1-5 parts of silicon carbide, 2-6 parts of a curing agent and 3-10 parts of a coupling agent, and belongs to the technical field of coatings. The ultra-smooth energy-saving coating material for the water pump has the advantages of high strength, strong wear resistance and corrosion resistance and excellent bonding property.
Description
Technical Field
The application belongs to the technical field of coatings, and particularly relates to an ultra-smooth energy-saving coating material for a water pump and a preparation method thereof.
Background
For guaranteeing the overall strength of the water pump, the overall structure of the water pump is usually produced by metal materials, so that the structural integrity under the impact of internal pressure is guaranteed. However, the liquid to be transferred contains more impurities, and the transfer process generates larger frictional resistance, which causes larger erosion and damage to the internal structure of the water pump, and is not beneficial to the stability of the whole structure of the water pump.
The coating is used as a film forming substance for protecting the surface of the substrate, and mainly separates the surface of the substrate from other media including liquid, gas and solid substances, so that the surface of the substrate is prevented from physical and mechanical damage or chemical behavior damage due to direct contact or indirect radiation. However, most of the existing coating materials have the problems of low strength, poor wear resistance and corrosion resistance, unsatisfactory adhesion with a base material and easy shedding of the coating.
Disclosure of Invention
In order to solve the problems, the application provides the ultra-smooth energy-saving coating material for the water pump, which has high strength, stronger wear resistance and corrosion resistance and excellent bonding performance.
The invention adopts the following technical scheme:
the super-smooth energy-saving coating material for the water pump comprises a primer coating and a surface coating, wherein the primer coating comprises, by weight, 35-60 parts of epoxy acrylate resin, 15-30 parts of polydimethylsiloxane, 10-20 parts of polyurethane, 2-10 parts of hexagonal boron nitride, 2-6 parts of a curing agent, 0.5-2 parts of a defoaming agent and 3-10 parts of a coupling agent; the surface layer coating comprises 40-70 parts of epoxy resin, 5-15 parts of polyamide imide, 2-10 parts of polytetrafluoroethylene, 2-6 parts of titanium nitride, 1-5 parts of silicon carbide, 2-6 parts of a curing agent and 3-10 parts of a coupling agent.
Preferably, the primer comprises 50 parts of epoxy acrylate resin, 23 parts of polydimethylsiloxane, 15 parts of polyurethane, 6 parts of hexagonal boron nitride, 4 parts of a curing agent, 1.2 parts of a defoaming agent and 6 parts of a coupling agent; the surface coating comprises 55 parts of epoxy resin, 10 parts of polyamide-imide, 6 parts of polytetrafluoroethylene, 4 parts of titanium nitride, 3 parts of silicon carbide, 4 parts of curing agent and 6 parts of coupling agent.
Preferably, the curing agent is an aliphatic amine curing agent, and the aliphatic amine curing agent comprises one or more of ethylenediamine, diethylenetriamine, triethylenetetramine and hexamethylenediamine.
Preferably, the coupling agent is a silane coupling agent comprising one or more of vinyltriethoxysilane, vinyltrimethoxysilane and vinyltris (β -methoxyethoxy) silane.
Preferably, the defoamer is a silicone defoamer.
Preferably, the thickness of the primer coating is 0.5-2 mm, and the thickness of the surface coating is 0.5-2 mm;
more preferably, the thickness of the primer is 1.5mm and the thickness of the topcoat is 1.2 mm.
A preparation method of an ultra-smooth energy-saving coating material for a water pump comprises the following steps:
s1, preparing a primer: dissolving 35-60 parts of epoxy acrylate resin and 15-30 parts of polydimethylsiloxane into a solvent, stirring for 0.5h at normal temperature, then adding 10-20 parts of polyurethane, 2-10 parts of hexagonal boron nitride, 2-6 parts of a curing agent, 0.5-2 parts of a defoaming agent and 3-10 parts of a coupling agent, stirring for 0.5h at normal temperature, and then carrying out ultrasonic stirring for 4h at 40 ℃ to obtain a mixture A;
s2, preparing a surface layer coating: dissolving 40-70 parts of epoxy resin and 5-15 parts of polyamide imide into a solvent, stirring for 1 hour at normal temperature, then adding 2-10 parts of polytetrafluoroethylene, 2-6 parts of titanium nitride, 1-5 parts of silicon carbide, 2-6 parts of a curing agent and 3-10 parts of a coupling agent, stirring for 1 hour at normal temperature, and then ultrasonically stirring for 6 hours at 40 ℃ to obtain a mixture B;
s3, matrix pretreatment: polishing the surface of the substrate by using sand paper, then washing the surface of the substrate by using acetone, and naturally drying;
s4, coating: and (3) coating a bottom coating on the surface of the substrate by adopting a dip-coating process, dip-coating a surface coating after the substrate is in a semi-cured state, and finally placing the sample in an oven for drying to completely cure the sample to obtain the coating material.
Preferably, the substrate is a metallic material, preferably steel.
Preferably, the solvent of steps S1 and S2 is acetone or absolute ethanol, more preferably acetone.
Preferably, the drying temperature of the step S4 is 75-85 ℃, and more preferably 80 ℃.
A water pump comprises a pump body, wherein an ultra-smooth energy-saving coating material is coated on the inner wall of the pump body, and is selected from any ultra-smooth energy-saving coating material for the water pump or any ultra-smooth energy-saving coating material for the water pump prepared by the preparation method.
This application can bring following beneficial effect:
1. according to the super-smooth energy-saving coating material for the water pump, the epoxy acrylate resin and the polydimethylsiloxane in the primer have excellent cohesiveness, the polyurethane has considerable wear resistance, and the corrosion resistance of the coating is improved by adding the hexagonal boron nitride; the polyamide imide in the surface layer coating has excellent wear resistance and cohesiveness, the titanium nitride and the silicon carbide have high hardness, the wear resistance and the corrosion resistance of the coating can be improved to a great extent, the friction coefficient of the polytetrafluoroethylene is extremely low, and the polyamide imide can be used as a filler of epoxy resin to improve the wear resistance and the corrosion resistance of an epoxy adhesive; the polymer material and various fillers are well combined, so that uniform and regular grading morphology can be constructed, and the mechanical strength of the hydrophobic coating is improved; the composite coating formed by combining the primer coating and the surface coating has excellent hydrophobicity, mechanical durability and firm bonding performance.
2. The aliphatic amine curing agent has good corrosion resistance and mechanical property, can be rapidly cured at room temperature, and improves the production efficiency; the silane coupling agent has better compatibility with resin in the coating, and improves the adhesion, corrosion resistance, friction resistance and impact resistance of the coating.
3. The thickness setting of the primer coating and the surface coating is in a reasonable range, so that the coating can be saved, the production cost is reduced, and the excellent hydrophobicity, the excellent cohesiveness and the excellent durability of the coating can be ensured.
4. The preparation method of the super-smooth energy-saving coating material for the water pump is simple and convenient, the distribution uniformity of the coating material and the adhesion between the coating material and a substrate can be effectively improved, and the prepared coating material is high in bonding force and mechanical strength.
Detailed Description
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
Base material: using a size of 2cm2×3cm2Q235 steel sheet
Example 1: the preparation method of the super-smooth energy-saving coating material for the water pump comprises the following steps:
s1, preparing a primer: dissolving 35 parts of epoxy acrylate resin and 15 parts of polydimethylsiloxane into an acetone solvent, stirring at normal temperature for 0.5h, then adding 10 parts of polyurethane, 2 parts of hexagonal boron nitride, 2 parts of diethylenetriamine, 0.5 part of organic silicon defoamer and 3 parts of vinyltriethoxysilane, stirring at normal temperature for 0.5h, and then ultrasonically stirring at 40 ℃ for 4h to obtain a mixture A;
s2, preparing a surface layer coating: dissolving 40 parts of epoxy resin and 5 parts of polyamide imide into an acetone solvent, stirring at normal temperature for 1 hour, then adding 2 parts of polytetrafluoroethylene, 2 parts of titanium nitride, 1 part of silicon carbide, 2 parts of hexamethylenediamine and 3 parts of vinyltriethoxysilane, stirring at normal temperature for 1 hour, and then ultrasonically stirring at 40 ℃ for 6 hours to obtain a mixture B;
s3, matrix pretreatment: polishing the surface of the steel sheet by using sand paper, then washing the surface of the steel sheet by using acetone, and naturally drying;
s4, coating: and (3) coating a bottom coating on the surface of the steel sheet by adopting a dip-coating process, dip-coating a surface coating after the steel sheet is in a semi-cured state, and finally, drying the sample in an oven at the temperature of 80 ℃ to completely cure the sample to obtain the coating material.
The thickness of the prepared primer is 0.5mm, and the thickness of the surface layer coating is 0.5 mm.
Example 2: the preparation method of the super-smooth energy-saving coating material for the water pump comprises the following steps:
s1, preparing a primer: dissolving 42 parts of epoxy acrylate resin and 20 parts of polydimethylsiloxane into an acetone solvent, stirring at normal temperature for 0.5h, then adding 12 parts of polyurethane, 4 parts of hexagonal boron nitride, 3 parts of triethylene tetramine and hexamethylene diamine in a mass ratio of 1:1.2, 0.8 part of organic silicon defoaming agent and 4 parts of vinyl tri (beta methoxyethoxy) silane, stirring at normal temperature for 0.5h, and then ultrasonically stirring at 40 ℃ for 4h to obtain a mixture A;
s2, preparing a surface layer coating: dissolving 48 parts of epoxy resin and 8 parts of polyamide-imide into an acetone solvent, stirring at normal temperature for 1 hour, then adding 4 parts of polytetrafluoroethylene, 3 parts of titanium nitride, 2 parts of silicon carbide, 3 parts of triethylene tetramine and 4 parts of vinyl trimethoxy silane, stirring at normal temperature for 1 hour, and then ultrasonically stirring at 40 ℃ for 6 hours to obtain a mixture B;
s3, matrix pretreatment: polishing the surface of the steel sheet by using abrasive paper, then washing the surface of the steel sheet by using acetone, and naturally drying;
s4, coating: and (3) coating a bottom coating on the surface of the steel sheet by adopting a dip-coating process, dip-coating a surface coating after the steel sheet is in a semi-cured state, and finally, drying the sample in an oven at the temperature of 80 ℃ to completely cure the sample to obtain the coating material.
The thickness of the prepared primer is 1mm, and the thickness of the surface layer coating is 0.8 mm.
Example 3: the preparation method of the super-smooth energy-saving coating material for the water pump comprises the following steps:
s1, preparing a primer: dissolving 50 parts of epoxy acrylate resin and 23 parts of polydimethylsiloxane into an acetone solvent, stirring at normal temperature for 0.5h, then adding 15 parts of polyurethane, 6 parts of hexagonal boron nitride, 4 parts of triethylene tetramine, 1.2 parts of organic silicon defoamer and 6 parts of vinyl trimethoxy silane, stirring at normal temperature for 0.5h, and then ultrasonically stirring at 40 ℃ for 4h to obtain a mixture A;
s2, preparing a surface layer coating: dissolving 55 parts of epoxy resin and 10 parts of polyamide-imide into an acetone solvent, stirring at normal temperature for 1h, then adding 6 parts of polytetrafluoroethylene, 4 parts of titanium nitride, 3 parts of silicon carbide, 4 parts of triethylene tetramine and 6 parts of vinyl trimethoxy silane, stirring at normal temperature for 1h, and then ultrasonically stirring at 40 ℃ for 6h to obtain a mixture B;
s3, matrix pretreatment: polishing the surface of the steel sheet by using abrasive paper, then washing the surface of the steel sheet by using acetone, and naturally drying;
s4, coating: and (3) coating a bottom coating on the surface of the steel sheet by adopting a dip-coating process, dip-coating a surface coating after the steel sheet is in a semi-cured state, and finally, drying the sample in an oven at the temperature of 80 ℃ to completely cure the sample to obtain the coating material.
The thickness of the prepared primer is 1.5mm, and the thickness of the surface layer coating is 1.2 mm.
Example 4: the preparation method of the super-smooth energy-saving coating material for the water pump comprises the following steps:
s1, preparing a primer: dissolving 55 parts of epoxy acrylate resin and 27 parts of polydimethylsiloxane into an acetone solvent, stirring at normal temperature for 0.5h, then adding 18 parts of polyurethane, 8 parts of hexagonal boron nitride, 5 parts of diethylenetriamine, 1.6 parts of an organic silicon defoaming agent and 8 parts of vinyltriethoxysilane and vinyltrimethoxysilane in a mass ratio of 0.8:1.1, stirring at normal temperature for 0.5h, and then performing ultrasonic stirring at 40 ℃ for 4h to obtain a mixture A;
s2, preparing a surface layer coating: dissolving 63 parts of epoxy resin and 12 parts of polyamide-imide into an acetone solvent, stirring at normal temperature for 1h, then adding 8 parts of polytetrafluoroethylene, 5 parts of titanium nitride, 4 parts of silicon carbide, 5 parts of ethylenediamine and 8 parts of vinyltriethoxysilane, stirring at normal temperature for 1h, and then ultrasonically stirring at 40 ℃ for 6h to obtain a mixture B;
s3, matrix pretreatment: polishing the surface of the steel sheet by using sand paper, then washing the surface of the steel sheet by using acetone, and naturally drying;
s4, coating: and (3) coating a bottom coating on the surface of the steel sheet by adopting a dip-coating process, dip-coating a surface coating after the steel sheet is in a semi-cured state, and finally, drying the sample in an oven at the temperature of 80 ℃ to completely cure the sample to obtain the coating material.
The thickness of the prepared primer is 1.8mm, and the thickness of the surface layer coating is 1.6 mm.
Example 5: the preparation method of the super-smooth energy-saving coating material for the water pump comprises the following steps:
s1, preparing a primer: dissolving 60 parts of epoxy acrylate resin and 30 parts of polydimethylsiloxane into an acetone solvent, stirring at normal temperature for 0.5h, then adding 20 parts of polyurethane, 10 parts of hexagonal boron nitride, 6 parts of hexamethylenediamine, 2 parts of an organic silicon defoaming agent and 10 parts of vinyl tris (beta-methoxyethoxy) silane, stirring at normal temperature for 0.5h, and then carrying out ultrasonic stirring at 40 ℃ for 4h to obtain a mixture A;
s2, preparing a surface layer coating: dissolving 70 parts of epoxy resin and 15 parts of polyamide-imide into an acetone solvent, stirring at normal temperature for 1h, then adding 10 parts of polytetrafluoroethylene, 6 parts of titanium nitride, 5 parts of silicon carbide, 6 parts of ethylenediamine and 10 parts of vinyl trimethoxy silane, stirring at normal temperature for 1h, and then ultrasonically stirring at 40 ℃ for 6h to obtain a mixture B;
s3, matrix pretreatment: polishing the surface of the steel sheet by using sand paper, then washing the surface of the steel sheet by using acetone, and naturally drying;
s4, coating: and (3) coating a bottom coating on the surface of the steel sheet by adopting a dip-coating process, dip-coating a surface coating after the steel sheet is in a semi-cured state, and finally, drying the sample in an oven at the temperature of 80 ℃ to completely cure the sample to obtain the coating material.
The thickness of the prepared bottom layer coating is 2mm, and the thickness of the surface layer coating is 2 mm.
Comparative example 1
The comparative example differs from example 3 in that the primer comprises 30 parts of epoxy acrylate resin, 10 parts of polydimethylsiloxane, 7 parts of polyurethane, 1 part of hexagonal boron nitride, 1 part of ethylenediamine, 0.3 part of silicone defoamer and 1.5 parts of vinyl trimethoxysilane; the surface layer coating comprises 30 parts of epoxy resin, 3 parts of polyamide-imide, 1 part of polytetrafluoroethylene, 1 part of titanium nitride, 0.5 part of silicon carbide, 1 part of ethylenediamine and 1.5 parts of vinyl trimethoxy silane.
Comparative example 2
The comparative example differs from example 3 in that the primer comprises 70 parts of epoxy acrylate resin, 35 parts of polydimethylsiloxane, 25 parts of polyurethane, 14 parts of hexagonal boron nitride, 8 parts of ethylenediamine, 3 parts of an organosilicon defoamer and 12 parts of vinyl trimethoxysilane; the surface coating comprises 80 parts of epoxy resin, 20 parts of polyamide-imide, 12 parts of polytetrafluoroethylene, 8 parts of titanium nitride, 7 parts of silicon carbide, 8 parts of ethylenediamine and 12 parts of vinyl trimethoxy silane.
Comparative example 3
This comparative example differs from example 3 in that no hexagonal boron nitride was added.
Comparative example 4
This comparative example differs from example 3 in that no titanium nitride was added.
Comparative example 5
This comparative example differs from example 3 in that the curing agent was m-xylylenediamine.
Comparative example 6
This comparative example is different from example 3 in that the thickness of the primer was 2.5mm and the thickness of the topcoat was 2.5 mm.
Comparative example 7
This comparative example differs from example 3 in that the base material is an iron sheet.
Examples 1 to 5 in table 1 are all examples of the present invention, comparative examples 1 to 7 are comparative examples of the present invention, and the coating properties prepared in examples 1 to 5 and comparative examples 1 to 7 were measured, respectively, and the results are shown in tables 1 and 2 below.
Hydrophobicity test: the water contact angle of the coating was measured using a DSA100 optical contact angle goniometer, the drop volume was 5 microliters, each sample was measured five times at different positions, and the average was finally used.
And (3) wear resistance test: the surface condition of the sample was observed after the sample was rubbed with 0000# steel wool (weight 1Kg) 3000 times.
And (3) corrosion resistance testing: the corrosion test was performed using an artificial simulated seawater (3.5% aqueous NaCl solution) corrosion medium. The test is carried out at normal temperature, a sample to be tested is soaked in 3.5% NaCl aqueous solution for 60 days, and then the sample is taken out, cleaned, dried and weighed to detect the corrosion resistance of the sample.
And (3) testing the adhesive force: baige adhesion test method (ASTM D3359)
TABLE 1
TABLE 2
O: the number of scratches with the surface of more than 1cm is less than 5;
□: the number of scratches with a surface of > 1cm is between 5 and 30;
and (delta): the number of scratches > 1cm on the surface was more than 30.
As can be seen from the test results in tables 1 and 2: the test effect of the embodiment 3 of the invention is excellent, the adhesive force of the coating is 0 grade, the weight loss rate is lowest, and the hydrophobicity and the wear resistance are excellent; when the coating is selected in parts by weight which does not meet the requirements of the application, the problems of hydrophobicity, wear resistance, corrosion resistance and adhesion are reduced; the test data of the comparative examples 3 to 5 show that the raw materials in the technical scheme of the application have synergistic effect and are deficient; the thickness of the coating and the type of the matrix have great influence on the adhesive force; the coating material prepared by the technical scheme of the invention has the advantages of obviously improving the performances of hydrophobicity, corrosion resistance, impact wear resistance and the like, effectively saving energy, prolonging the service life of a water pump and solving the technical problems in the prior art.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, as for the system embodiment, since it is substantially similar to the method embodiment, the description is relatively simple, and reference may be made to the partial description of the method embodiment for relevant points.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (8)
1. The ultra-smooth energy-saving coating material for the water pump is characterized by comprising a bottom coating and a surface coating, wherein the bottom coating comprises 50 parts by weight of epoxy acrylate resin, 23 parts by weight of polydimethylsiloxane, 15 parts by weight of polyurethane, 6 parts by weight of hexagonal boron nitride, 4 parts by weight of curing agent, 1.2 parts by weight of defoaming agent and 6 parts by weight of coupling agent; the surface coating comprises 55 parts of epoxy resin, 10 parts of polyamide-imide, 6 parts of polytetrafluoroethylene, 4 parts of titanium nitride, 3 parts of silicon carbide, 4 parts of curing agent and 6 parts of coupling agent;
wherein the curing agent is triethylene tetramine;
the thickness of the bottom layer coating is 1.5mm, and the thickness of the surface layer coating is 1.2 mm.
2. The ultra-smooth energy-saving coating material for water pumps as claimed in claim 1, wherein the coupling agent is a silane coupling agent comprising one or more of vinyltriethoxysilane, vinyltrimethoxysilane and vinyltris (β -methoxyethoxy) silane.
3. The ultra-smooth energy-saving coating material for water pumps as claimed in claim 1, wherein the defoaming agent is a silicone defoaming agent.
4. A method of preparing the ultra-smooth energy-saving coating material for a water pump according to any one of claims 1 to 3, characterized in that: the method comprises the following steps:
s1, preparing a primer: dissolving 50 parts of epoxy acrylate resin and 23 parts of polydimethylsiloxane into a solvent, stirring at normal temperature for 0.5h, then adding 15 parts of polyurethane, 6 parts of hexagonal boron nitride, 4 parts of curing agent, 1.2 parts of defoaming agent and 6 parts of coupling agent, stirring at normal temperature for 0.5h, and then performing ultrasonic stirring at 40 ℃ for 4h to obtain a mixture A;
s2, preparing a surface layer coating: dissolving 55 parts of epoxy resin and 10 parts of polyamide imide into a solvent, stirring for 1 hour at normal temperature, then adding 6 parts of polytetrafluoroethylene, 4 parts of titanium nitride, 3 parts of silicon carbide, 4 parts of curing agent and 6 parts of coupling agent, stirring for 1 hour at normal temperature, and then ultrasonically stirring for 6 hours at 40 ℃ to obtain a mixture B;
s3, matrix pretreatment: polishing the surface of the substrate by using abrasive paper, then washing the surface of the substrate by using acetone, and naturally drying;
s4, coating: and (3) coating a bottom coating on the surface of the substrate by adopting a dip-coating process, dip-coating a surface coating after the substrate is in a semi-cured state, and finally placing the sample in an oven for drying to completely cure the sample to obtain the coating material.
5. The preparation method of the ultra-smooth energy-saving coating material for the water pump as claimed in claim 4, wherein the base material is steel.
6. The method for preparing the ultra-smooth energy-saving coating material for the water pump according to claim 4, wherein the solvent of the steps S1 and S2 is acetone or absolute ethyl alcohol.
7. The preparation method of the ultra-smooth energy-saving coating material for the water pump according to claim 4, wherein the drying temperature of the step S4 is 75-85 ℃.
8. A water pump comprises a pump body and is characterized in that an ultra-smooth energy-saving coating material is coated on the inner wall of the pump body, and the ultra-smooth energy-saving coating material is the ultra-smooth energy-saving coating material for the water pump in any one of claims 1 to 3 or the ultra-smooth energy-saving coating material for the water pump prepared by the preparation method in any one of claims 4 to 7.
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