CN112795310B - Surface pretreatment agent matched with low-temperature cathode electrophoretic paint for compressor liquid storage tank - Google Patents

Surface pretreatment agent matched with low-temperature cathode electrophoretic paint for compressor liquid storage tank Download PDF

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CN112795310B
CN112795310B CN202110072626.3A CN202110072626A CN112795310B CN 112795310 B CN112795310 B CN 112795310B CN 202110072626 A CN202110072626 A CN 202110072626A CN 112795310 B CN112795310 B CN 112795310B
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film
weight ratio
deionized water
water
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CN112795310A (en
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王海丽
刘泽飞
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Hefei Lvtuo New Materials Technology Co ltd
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Hefei Lvtuo New Materials Technology Co ltd
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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
    • C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
    • C09D183/04—Polysiloxanes
    • C09D183/08—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen, and oxygen
    • 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
    • C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
    • C09D179/02—Polyamines
    • 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
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2237—Oxides; Hydroxides of metals of titanium
    • C08K2003/2241—Titanium dioxide

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Abstract

The invention discloses a surface pretreatment agent matched with low-temperature cathode electrophoretic paint for a compressor liquid storage tank, which comprises components A, B and C, wherein the component A comprises the following raw materials in parts by weight per 1Kg of the treatment agent: the invention relates to the technical field of surface treating agents for compressor liquid storage tanks, and discloses a water-soluble sulfonated polyaniline solution, which comprises 16-40g of water-soluble sulfonated polyaniline solution, 10-25g of lactic acid, 5-12g of film-forming agent a, 3-8g of film-forming agent b, 1-5g of dispersing agent, 2-3g of wetting, leveling and defoaming film-forming auxiliary agent and the balance of deionized water. The surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank can effectively improve the solubility of polyaniline in common organic solvents and water, and after the properly treated soluble polyaniline and the properly treated zirconium-titanium-silicon compound are compounded and implemented in a proper proportion, a film layer of the surface pretreatment agent matched with a conventional organic coating shows more excellent adhesive force performance and salt spray performance.

Description

Surface pretreatment agent matched with low-temperature cathode electrophoretic paint for compressor liquid storage tank
Technical Field
The invention relates to the technical field of surface treatment agents for compressor liquid storage tanks, in particular to a surface pretreatment agent matched with low-temperature cathode electrophoretic paint for a compressor liquid storage tank.
Background
The compressor industry requires special: the electrophoresis baking temperature of other industries is 170-: at 140 ℃.
The compressor industry has high performance requirements due to mass product export, and NSS salt spray requirements are high.
The pretreatment agent matched with the original low-temperature electrophoresis: phosphating solution: the paint contains phosphorus, zinc and nickel, has large sediments and is not environment-friendly, can meet the salt spray performance requirement of products by matching with low-temperature electrophoretic paint, but blocks a pipeline spray head after a large amount of sediments are generated, so that the salt spray performance is good and bad.
Some manufacturers try to treat the silicon-containing nano ceramic products with novel silanes, and although the problem of environmental protection is solved, the manufacturers find that: the surface condition and the salt spray condition are difficult to reach the standard after being matched with the low-temperature electrophoretic paint.
On the basis, the invention discloses a special pretreatment agent matched with low-temperature electrophoretic paint in the compressor industry: the paint does not contain phosphorus and heavy metal which are limited by environmental protection, does not have sediment, is stable, and particularly has a leading salt spray performance market matched with low-temperature electrophoretic paint.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a surface pretreatment agent matched with a low-temperature cathode electrophoretic paint for a compressor liquid storage tank, which is suitable for being matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank, does not contain phosphorus and heavy metal and has high salt spray performance.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: the surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank comprises components A, B and C, wherein the component A comprises the following raw materials in parts by weight per 1Kg of the treatment agent: 16-40g of water-soluble sulfonated polyaniline solution, 10-25g of lactic acid, 5-12g of film-forming agent a, 3-8g of film-forming agent b, 1-5g of dispersing agent, 2-3g of wetting, leveling and defoaming film-forming assistant and the balance of deionized water;
the component B is modified organic silicon resin liquid, and the raw materials in the weight ratio of each 1Kg of the treating agent comprise: 15-30g of isopropanol, 5-8g of epoxy silane coupling agent, 20-40g of amino siloxane oligomer, 8-16g of water-based organic silicon resin, 0.5-1g of leveling dispersant and the balance of deionized water;
the component C is a PH regulator, and the components in the weight ratio of each 1Kg of the treating agent comprise the following raw materials: 30-60g of anhydrous sodium carbonate and the balance of deionized water.
Preferably, the component A comprises the following raw materials in a weight ratio of each 1Kg of the treating agent: 19g of water-soluble sulfonated polyaniline solution, 10g of lactic acid, 5g of film-forming agent a, 3g of film-forming agent b, 1g of dispersing agent, 2g of wetting, leveling and defoaming film-forming aid and the balance of deionized water;
the component B is modified organic silicon resin liquid, and the raw materials in the weight ratio of each 1Kg of the treating agent comprise: 15g of isopropanol, 5g of epoxy silane coupling agent, 20g of amino siloxane oligomer, 8g of water-based organic silicon resin, 0.5g of leveling dispersant and the balance of deionized water;
the component C is a PH regulator, and the components in the weight ratio of each 1Kg of the treating agent comprise the following raw materials: 30g of anhydrous sodium carbonate and the balance of deionized water.
Preferably, the component A comprises the following raw materials in a weight ratio of each 1Kg of the treating agent: 21g of water-soluble sulfonated polyaniline solution, 15g of lactic acid, 8g of film-forming agent a, 5g of film-forming agent b, 2g of dispersing agent, 2g of wetting, leveling and defoaming film-forming aid and the balance of deionized water;
the component B is modified organic silicon resin liquid, and the raw materials in the weight ratio of each 1Kg of the treating agent comprise: 18g of isopropanol, 6g of epoxy silane coupling agent, 20g of amino siloxane oligomer, 10g of water-based organic silicon resin, 0.5g of leveling dispersant and the balance of deionized water;
the component C is a PH regulator, and the components in the weight ratio of each 1Kg of the treating agent comprise the following raw materials: 40g of anhydrous sodium carbonate and the balance of deionized water.
Preferably, the component A comprises the following raw materials in a weight ratio of each 1Kg of the treating agent: 40g of water-soluble sulfonated polyaniline solution, 25g of lactic acid, 12g of film-forming agent a, 8g of film-forming agent b, 5g of dispersing agent, 3g of wetting, leveling and defoaming film-forming aid and the balance of deionized water;
the component B is modified organic silicon resin liquid, and the raw materials in the weight ratio of each 1Kg of the treating agent comprise: 30g of isopropanol, 8g of epoxy silane coupling agent, 40g of amino siloxane oligomer, 16g of water-based organic silicon resin, 1g of leveling dispersant and the balance of deionized water;
the component C is a PH regulator, and the components in the weight ratio of each 1Kg of the treating agent comprise the following raw materials: 60g of anhydrous sodium carbonate and the balance of deionized water.
Preferably, 16-40g of the water-soluble sulfonated polyaniline solution consists of 12-30g of sulfonic acid, 2-5g of polyaniline and 2-5g of hydrogen peroxide.
Preferably, the film forming agent a is zirconium carbonate, and the film forming agent b is titanium dioxide.
Preferably, the dispersing agent is polyacrylic acid, and the deionized water is deionized water with the conductivity less than or equal to 10 mu S/cm.
Preferably, the wetting leveling defoaming film-forming aid and the leveling dispersant are both acetylenic diol surfactants.
In a second aspect, the invention also provides a preparation method of the surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank, and the preparation method of the component A specifically comprises the following steps:
s1, preparing water-soluble sulfonated polyaniline: adding a proper amount of deionized water according to the weight ratio, stirring in a vertical reaction kettle with a high-speed shearing dispersion machine, heating to 60 ℃, and stirring sulfonic acid, polyaniline and hydrogen peroxide according to the weight ratio at the rotating speed of 600 plus materials and 800r/min for 6-10 hours to obtain a water-soluble sulfonated polyphenyl solution for later use;
s2, preparing a film forming solution: adding a proper amount of deionized water into an empty reaction kettle, stirring at the normal temperature and the rotation speed of 120 plus materials at 150r/min, sequentially adding lactic acid, zirconium carbonate and titanium dioxide according to the weight ratio, and stirring for 0.5-1 h to obtain a film-forming solution.
S3, slowly pumping the solution obtained in the step S1 into the film forming solution obtained in the step S2, stirring the solution at the rotating speed of 150r/min for 1 to 1.5 hours until the solution is transparent to semitransparent liquid, sequentially adding a dispersant polyacrylic acid and a wetting leveling defoaming film forming aid acetylene glycol for surface activity, and mixing and stirring the solution for 2 to 3 hours to obtain the product;
the method for preparing the modified organic silicon resin liquid by the component B comprises the following specific steps:
adding a proper amount of deionized water according to the weight ratio, stirring in a reaction kettle, heating to 60 ℃, respectively adding isopropanol, an epoxy silane coupling agent and an aminosilane oligomer according to the weight ratio, stirring at the rotating speed of 120 plus materials and 150r/min for 12 hours, and then adding the water-based organic silicon resin to obtain a modified organic silicon resin liquid;
the preparation method of the component C comprises the following specific steps:
adding a proper amount of deionized water according to the weight ratio, stirring in a reaction kettle, adding anhydrous sodium carbonate according to the weight ratio, stirring at the rotating speed of 120 plus materials/min for 20 minutes at normal temperature, and obtaining the PH regulator.
In a third aspect, the invention also provides a use method of the surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank, which specifically comprises the following steps: the treating agent composition comprises 3-5% of an agent A, 1-5% of an agent A and 1-5:1 of an agent B, wherein the agent A, the agent B and the agent C are uniformly mixed according to the required weight ratio for use: 1-1.6%, the using weight ratio of the agent C is the total weight of the agent A and the agent B after preparation: 0.2 to 0.5 percent.
According to the prior technical documents at home and abroad, the polyaniline has the advantages of easily available raw materials, simple synthesis process, good chemical and environmental stability and excellent anticorrosion effect on metal surfaces, but in the implementation of the prior art in the market, the fact that the solubility of polyaniline in water and organic solvents is extremely poor is found, which brings certain difficulties to product characterization and greatly limits the application of polyaniline.
The water-soluble conductive polymer polyaniline can be obtained by introducing sulfonic acid groups on the polyaniline molecular chain, and the solubility of the polyaniline in common organic solvents and water can be effectively improved.
Generally, the hydration coupling performance of the zirconium-titanium-silicon compound is widely accepted and applied in the existing market, is suitable for powder spraying of the subsequent process and matching of high-temperature electrophoretic paint, meets the basic market demand, but is also ineligible for meeting the requirement of high salt spray after matching of a liquid storage tank outlet product in the compressor industry with novel energy-saving low-temperature electrophoretic paint.
Surprisingly, after the suitably treated soluble polyaniline and the suitably treated zirconium-titanium-silicon composite are compounded and implemented in a suitable ratio, the film layer of the composite shows more excellent adhesion performance and salt spray performance when being matched with a conventional organic coating, and shows more geometric multiplication type synergistic performance on the organic coating under the extreme condition.
It is known that chemical oxidation is the simplest and most effective method for preparing soluble polyaniline, but the amount of main acid and oxide affects the water solubility of polyaniline. The degree of water solubility and the amount of polyaniline used affect the functional role of polyaniline in surface treatment agents.
In the sulfonated polyphenylene solution of the present invention, a sulfonic acid group is preferred as an introduced group, p-toluenesulfonic acid is more preferred as a sulfonic acid group provider, peroxide is preferred as an oxidizing agent, and hydrogen peroxide is more preferred as an oxidizing agent.
It has been found that the pH of the solution, the degree of hydrolysis of the zirconium titanium silicon compound and the amount of zirconium titanium silicon compound used affect the adhesion quality of the film formed.
The zirconium compound in the invention is preferably zirconium carbonate without fluorine, the zirconium carbonate has high zirconium content, can provide enough zirconium ion content for film formation under the condition of adding a small amount of zirconium carbonate, carbonate in the zirconium carbonate reacts with other substances in the solution and volatilizes in the form of carbonic acid, and redundant acid radical ions cannot be formed in the solution, so that the film layer is more compact and has no impurity.
The film-forming filler is preferably nano titanium dioxide, more preferably nano titanium dioxide with the particle size less than or equal to 5nm, and has better water dispersibility and better nano particle filling property.
According to the method, polyacrylic acid and alkynediol wetting and leveling agents are not added or other types of wetting and leveling agents are selected, after the wetting and leveling agents are implemented on the surface of a liquid storage tank, the implementation mode of a vertical automatic spraying line is simulated, and the fact that disordered water marks exist at the lowest end part of the liquid storage tank, the adhesive force and the salt spray performance of the water mark part after the wetting and leveling agent is baked in cooperation with low-temperature electrophoresis are reduced, and a small number of pinholes appear on the surface of a paint film is greatly related to the dispersing performance of polyacrylic acid and the wetting, leveling and defoaming performance of the alkynediol surfactant.
According to the method, the organic silicon resin liquid is not added or the organic silicon resin is directly added without modification, after the solution is applied to the surface of the liquid storage tank, a macroscopic film layer is found to be in a bright state, and the adhesion force is linearly reduced after the solution is matched with low-temperature electrophoresis and baked, so that the method has a great relationship with the cross-linking coupling bridging effect of the silane coupling agent, the silane oligomer and the organic silicon resin.
It has been found that the pH of the solution, and in many embodiments, the duration of the film formation and the compactness of the formed film, are affected, and anhydrous sodium carbonate, which is a preferred material of the present invention, is readily available and inexpensive as the pH of the solution.
(III) advantageous effects
The invention provides a surface pretreatment agent matched with low-temperature cathode electrophoretic paint for a compressor liquid storage tank. Compared with the prior art, the method has the following beneficial effects:
(1) the surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank can realize that water-soluble conductive polymer polyaniline can be obtained by introducing sulfonic groups on a polyaniline molecular chain, can effectively improve the solubility of the polyaniline in common organic solvents and water, and after the properly treated soluble polyaniline and a properly treated zirconium-titanium-silicon compound are compounded and implemented in a proper proportion, a film layer of the surface pretreatment agent matched with a conventional organic coating shows more excellent adhesive force performance and salt spray performance, and the surface pretreatment agent does not contain phosphorus and heavy metal limited by environmental protection, does not have sediment, is stable, and particularly has a leading market in the salt spray performance matched with the low-temperature electrophoretic paint.
(2) The surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank preferably contains no fluorine zirconium carbonate, the zirconium carbonate has high zirconium content, and can provide enough zirconium ion content for film formation under the condition of small addition, carbonate in the zirconium carbonate volatilizes in the form of carbonic acid after reacting with other substances in the solution, so that redundant acid radical ions cannot be formed in the solution, and a film layer is more compact and has no miscellaneous items.
Drawings
FIG. 1 is a flow chart of an effect analysis experiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention provides five technical solutions: a surface pretreatment agent matched with low-temperature cathode electrophoretic paint for a compressor liquid storage tank specifically comprises the following embodiments:
example 1
A surface pretreatment agent matched with low-temperature cathode electrophoretic paint for a compressor liquid storage tank comprises components A, B and C, wherein the component A comprises the following raw materials in parts by weight per 1Kg of the treatment agent: 19g of water-soluble sulfonated polyaniline solution, 10g of lactic acid, 5g of film-forming agent a, 3g of film-forming agent b, 1g of dispersing agent, 2g of wetting, leveling and defoaming film-forming aid and the balance of deionized water, wherein the water-soluble sulfonated polyaniline solution consists of 15g of sulfonic acid, 5g of polyaniline and 5g of hydrogen peroxide, the film-forming agent a is zirconium carbonate, the film-forming agent b is titanium dioxide, the dispersing agent is polyacrylic acid, and the deionized water has the conductivity of less than or equal to 10 mu S/cm;
the component B is modified organic silicon resin liquid, and the raw materials in the weight ratio of each 1Kg of treating agent comprise: 15g of isopropanol, 5g of epoxy silane coupling agent, 20g of amino siloxane oligomer, 8g of water-based organic silicon resin, 0.5g of leveling dispersant and the balance of deionized water;
the component C is a PH regulator, and the raw materials in the weight ratio of each 1Kg of the treating agent comprise: 30g of anhydrous sodium carbonate and the balance of deionized water.
In the embodiment of the invention, the wetting, leveling and defoaming film-forming assistant and the leveling and dispersing agent are all acetylenic diol surfactants.
The embodiment of the invention also provides a preparation method of the surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank, and the preparation method of the component A specifically comprises the following steps:
s1, preparing water-soluble sulfonated polyaniline: adding a proper amount of deionized water according to the weight ratio, stirring in a vertical reaction kettle with a high-speed shearing dispersion machine, heating to 60 ℃, and stirring sulfonic acid, polyaniline and hydrogen peroxide according to the weight ratio at the rotating speed of 600r/min for 6 hours to obtain a water-soluble sulfonated polyphenyl solution for later use;
s2, preparing a film forming solution: adding a proper amount of deionized water into an empty reaction kettle, stirring at normal temperature at the rotating speed of 120r/min, sequentially adding lactic acid, zirconium carbonate and titanium dioxide according to the weight ratio, and stirring for 0.5 hour to obtain a film forming solution.
S3, slowly pumping the solution obtained in the step S1 into the film forming solution obtained in the step S2, stirring the solution at the rotating speed of 120r/min for 1 hour until the solution is transparent to semitransparent liquid, sequentially adding a dispersant polyacrylic acid and a wetting leveling defoaming film forming aid acetylenediol for surface activity, and mixing and stirring the solution for 2 hours to obtain the product;
the method for preparing the modified organic silicon resin liquid by the component B comprises the following specific steps:
adding a proper amount of deionized water according to the weight ratio, stirring in a reaction kettle, heating to 60 ℃, respectively adding isopropanol, an epoxy silane coupling agent and an aminosilane oligomer according to the weight ratio, stirring at the rotating speed of 120r/min for 12 hours, and then adding the water-based organic silicon resin to obtain a modified organic silicon resin solution;
the preparation method of the component C comprises the following specific steps:
adding a proper amount of deionized water according to the weight ratio, stirring in a reaction kettle, adding anhydrous sodium carbonate according to the weight ratio, and stirring at the rotating speed of 120r/min for 20 minutes at normal temperature to obtain the pH regulator.
The embodiment of the invention also provides a use method of the surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank, which comprises the following specific steps: the treating agent composition comprises 3% of agent A, 3% of agent B and 3% of agent C, wherein the agent B comprises the following components in parts by weight: 1 percent, and the using weight ratio of the agent C is the total weight of the agent A and the agent B after preparation: 0.2%, PH of solution 5.1-5.4, operating temperature: and (5) normal temperature. Treatment time: 2 minutes, the results are shown in tables 1, 2, 3 and 4.
Example 2
A surface pretreatment agent matched with low-temperature cathode electrophoretic paint for a compressor liquid storage tank comprises components A, B and C, wherein the component A comprises the following raw materials in parts by weight per 1Kg of the treatment agent: 21g of water-soluble sulfonated polyaniline solution, 15g of lactic acid, 8g of film-forming agent a, 5g of film-forming agent b, 2g of dispersing agent, 2g of wetting, leveling and defoaming film-forming aid and the balance of deionized water, wherein the water-soluble sulfonated polyaniline solution consists of 15g of sulfonic acid, 3g of polyaniline and 3g of hydrogen peroxide, the film-forming agent a is zirconium carbonate, the film-forming agent b is titanium dioxide, the dispersing agent is polyacrylic acid, and the deionized water has the conductivity of less than or equal to 10 mu S/cm;
the component B is modified organic silicon resin liquid, and the raw materials in the weight ratio of each 1Kg of treating agent comprise: 18g of isopropanol, 6g of epoxy silane coupling agent, 20g of amino siloxane oligomer, 10g of water-based organic silicon resin, 0.5g of leveling dispersant and the balance of deionized water;
the component C is a PH regulator, and the raw materials in the weight ratio of each 1Kg of the treating agent comprise: 40g of anhydrous sodium carbonate and the balance of deionized water.
In the embodiment of the invention, the wetting, leveling and defoaming film-forming assistant and the leveling and dispersing agent are all acetylenic diol surfactants.
The embodiment of the invention also provides a preparation method of the surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank, and the preparation method of the component A specifically comprises the following steps:
s1, preparing water-soluble sulfonated polyaniline: adding a proper amount of deionized water according to the weight ratio, stirring in a vertical reaction kettle with a high-speed shearing dispersion machine, heating to 60 ℃, and stirring sulfonic acid, polyaniline and hydrogen peroxide according to the weight ratio for 7 hours at the rotating speed of 650r/min to obtain a water-soluble sulfonated polyphenyl solution for later use;
s2, preparing a film forming solution: adding a proper amount of deionized water into an empty reaction kettle, stirring at normal temperature at the rotating speed of 130r/min, sequentially adding lactic acid, zirconium carbonate and titanium dioxide according to the weight ratio, and stirring for 0.6 hour to obtain a film forming solution.
S3, slowly pumping the solution obtained in the step S1 into the film forming solution obtained in the step S2, stirring the solution at the rotating speed of 130r/min for 1.2 hours until the solution is transparent to semitransparent liquid, sequentially adding a dispersant polyacrylic acid and a wetting leveling defoaming film forming aid acetylenic diol for surface activity, and mixing and stirring the solution for 2.3 hours to obtain the product;
the method for preparing the modified organic silicon resin liquid by the component B comprises the following specific steps:
adding a proper amount of deionized water according to the weight ratio, stirring in a reaction kettle, heating to 60 ℃, respectively adding isopropanol, an epoxy silane coupling agent and an aminosilane oligomer according to the weight ratio, stirring at the rotating speed of 130r/min for 12 hours, and then adding the water-based organic silicon resin to obtain a modified organic silicon resin solution;
the preparation method of the component C comprises the following specific steps:
adding a proper amount of deionized water according to the weight ratio, stirring in a reaction kettle, adding anhydrous sodium carbonate according to the weight ratio, and stirring at the normal temperature for 20 minutes at the rotating speed of 130r/min to obtain the pH regulator.
The embodiment of the invention also provides a use method of the surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank, which comprises the following specific steps: the agent A, the agent B and the agent C are uniformly mixed and used according to the required weight ratio, the using weight ratio of the agent A of the treating agent composition is 4%, A: B is 4:1, and the using weight ratio of the agent B is as follows: 1 percent, and the using weight ratio of the agent C is the total weight of the agent A and the agent B after preparation: 0.3%, PH of solution 5.1, operating temperature: normal temperature, treatment time: 2 minutes, the results are shown in tables 1, 2, 3 and 4.
Example 3
A surface pretreatment agent matched with low-temperature cathode electrophoretic paint for a compressor liquid storage tank comprises components A, B and C, wherein the component A comprises the following raw materials in parts by weight per 1Kg of the treatment agent: 28g of water-soluble sulfonated polyaniline solution, 18g of lactic acid, 10g of film-forming agent a, 7g of film-forming agent b, 3g of dispersing agent, 3g of wetting, leveling and defoaming film-forming aid and the balance of deionized water, wherein the water-soluble sulfonated polyaniline solution consists of 20g of sulfonic acid, 4g of polyaniline and 4g of hydrogen peroxide, the film-forming agent a is zirconium carbonate, the film-forming agent b is titanium dioxide, the dispersing agent is polyacrylic acid, and the deionized water has the conductivity of less than or equal to 10 mu S/cm;
the component B is modified organic silicon resin liquid, and the raw materials in the weight ratio of each 1Kg of treating agent comprise: 20g of isopropanol, 7g of epoxy silane coupling agent, 25g of amino siloxane oligomer, 12g of water-based organic silicon resin, 1g of leveling dispersant and the balance of deionized water;
the component C is a PH regulator, and the raw materials in the weight ratio of each 1Kg of the treating agent comprise: 50g of anhydrous sodium carbonate and the balance of deionized water.
In the embodiment of the invention, the wetting, leveling and defoaming film-forming assistant and the leveling and dispersing agent are all acetylenic diol surfactants.
The embodiment of the invention also provides a preparation method of the surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank, and the preparation method of the component A specifically comprises the following steps:
s1, preparing water-soluble sulfonated polyaniline: adding a proper amount of deionized water according to the weight ratio, stirring in a vertical reaction kettle with a high-speed shearing dispersion machine, heating to 60 ℃, and stirring sulfonic acid, polyaniline and hydrogen peroxide according to the weight ratio at the rotating speed of 700r/min for 8 hours to obtain a water-soluble sulfonated polyphenyl solution for later use;
s2, preparing a film forming solution: adding a proper amount of deionized water into an empty reaction kettle, stirring at the normal temperature and the rotating speed of 140r/min, sequentially adding lactic acid, zirconium carbonate and titanium dioxide according to the weight ratio, and stirring for 0.7 hour to obtain a film forming solution.
S3, slowly pumping the solution obtained in the step S1 into the film forming solution obtained in the step S2, stirring the solution at the rotating speed of 140r/min for 1.3 hours until the solution is transparent to semitransparent liquid, sequentially adding a dispersant polyacrylic acid and a wetting leveling defoaming film forming aid acetylenic diol for surface activity, and mixing and stirring the solution for 2.5 hours to obtain the product;
the method for preparing the modified organic silicon resin liquid by the component B comprises the following specific steps:
adding a proper amount of deionized water according to the weight ratio, stirring in a reaction kettle, heating to 60 ℃, respectively adding isopropanol, an epoxy silane coupling agent and an aminosilane oligomer according to the weight ratio, stirring at the rotating speed of 140r/min for 12 hours, and then adding the water-based organic silicon resin to obtain a modified organic silicon resin solution;
the preparation method of the component C comprises the following specific steps:
adding a proper amount of deionized water according to the weight ratio, stirring in a reaction kettle, adding anhydrous sodium carbonate according to the weight ratio, and stirring at the rotating speed of 140r/min for 20 minutes at normal temperature to obtain the pH regulator.
The embodiment of the invention also provides a use method of the surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank, which comprises the following specific steps: the treating agent composition comprises an agent A, an agent B and an agent C which are uniformly mixed according to the required weight ratio for use, wherein the using weight ratio of the agent A is 5%, A: B is 5:1, and the using weight ratio of the agent B is as follows: 1 percent, and the using weight ratio of the agent C is the total weight of the agent A and the agent B after preparation: 0.4%, PH of solution 4.8-5.1, operating temperature: normal temperature, treatment time: 2 minutes, the results are shown in tables 1, 2, 3 and 4.
Example 4
A surface pretreatment agent matched with low-temperature cathode electrophoretic paint for a compressor liquid storage tank comprises components A, B and C, wherein the component A comprises the following raw materials in parts by weight per 1Kg of the treatment agent: 40g of water-soluble sulfonated polyaniline solution, 25g of lactic acid, 12g of film-forming agent a, 8g of film-forming agent b, 5g of dispersing agent, 3g of wetting, leveling and defoaming film-forming aid and the balance of deionized water, wherein the water-soluble sulfonated polyaniline solution consists of 30g of sulfonic acid, 5g of polyaniline and 5g of hydrogen peroxide, the film-forming agent a is zirconium carbonate, the film-forming agent b is titanium dioxide, the dispersing agent is polyacrylic acid, and the deionized water has the conductivity of less than or equal to 10 mu S/cm;
the component B is modified organic silicon resin liquid, and the raw materials in the weight ratio of each 1Kg of treating agent comprise: 30g of isopropanol, 8g of epoxy silane coupling agent, 40g of amino siloxane oligomer, 16g of water-based organic silicon resin, 1g of leveling dispersant and the balance of deionized water;
the component C is a PH regulator, and the raw materials in the weight ratio of each 1Kg of the treating agent comprise: 60g of anhydrous sodium carbonate and the balance of deionized water.
In the embodiment of the invention, the wetting, leveling and defoaming film-forming assistant and the leveling and dispersing agent are all acetylenic diol surfactants.
The embodiment of the invention also provides a preparation method of the surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank, and the preparation method of the component A specifically comprises the following steps:
s1, preparing water-soluble sulfonated polyaniline: adding a proper amount of deionized water according to the weight ratio, stirring in a vertical reaction kettle with a high-speed shearing dispersion machine, heating to 60 ℃, and stirring for 9 hours at the rotating speed of 750r/min by respectively taking sulfonic acid, polyaniline and hydrogen peroxide according to the weight ratio to obtain a water-soluble sulfonated polyphenyl solution for later use;
s2, preparing a film forming solution: adding a proper amount of deionized water into an empty reaction kettle, stirring at the normal temperature and the rotating speed of 145r/min, sequentially adding lactic acid, zirconium carbonate and titanium dioxide according to the weight ratio, and stirring for 0.8 hour to obtain a film forming solution.
S3, slowly pumping the membrane forming solution prepared in the step S2 in the step S1, stirring the solution at the rotating speed of 145r/min for 1.4 hours until the solution is transparent to semitransparent liquid, sequentially adding a dispersant polyacrylic acid and a wetting leveling defoaming membrane forming aid alkynediol for surface activity, and mixing and stirring the solution for 2.75 hours to obtain the membrane forming solution;
the method for preparing the modified organic silicon resin liquid by the component B comprises the following specific steps:
adding a proper amount of deionized water according to the weight ratio, stirring in a reaction kettle, heating to 60 ℃, respectively adding isopropanol, an epoxy silane coupling agent and an aminosilane oligomer according to the weight ratio, stirring at the rotating speed of 145r/min for 12 hours, and then adding the water-based organic silicon resin to obtain a modified organic silicon resin solution;
the preparation method of the component C comprises the following specific steps:
adding a proper amount of deionized water according to the weight ratio, stirring in a reaction kettle, adding anhydrous sodium carbonate according to the weight ratio, and stirring at the rotating speed of 145r/min for 20 minutes at normal temperature to obtain the pH regulator.
The embodiment of the invention also provides a use method of the surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank, which comprises the following specific steps: the treating agent composition comprises an agent A, an agent B and an agent C which are uniformly mixed according to the required weight ratio for use, wherein the using weight ratio of the agent A is 5%, A: B is 5:1, and the using weight ratio of the agent B is as follows: 1 percent, and the using weight ratio of the agent C is the total weight of the agent A and the agent B after preparation: 0.5%, PH of solution 4.4-4.6, operating temperature: normal temperature, treatment time: 2 minutes, the results are shown in tables 1, 2, 3 and 4.
Example 5
A surface pretreatment agent matched with low-temperature cathode electrophoretic paint for a compressor liquid storage tank comprises components A, B and C, wherein the component A comprises the following raw materials in parts by weight per 1Kg of the treatment agent: 35g of water-soluble sulfonated polyaniline solution, 20g of lactic acid, 8g of film-forming agent a, 6g of film-forming agent b, 4g of dispersing agent, 2g of wetting, leveling and defoaming film-forming aid and the balance of deionized water, wherein the water-soluble sulfonated polyaniline solution consists of 25g of sulfonic acid, 5g of polyaniline and 5g of hydrogen peroxide, the film-forming agent a is zirconium carbonate, the film-forming agent b is titanium dioxide, the dispersing agent is polyacrylic acid, and the deionized water has the conductivity of less than or equal to 10 mu S/cm;
the component B is modified organic silicon resin liquid, and the raw materials in the weight ratio of each 1Kg of treating agent comprise: 25g of isopropanol, 6g of epoxy silane coupling agent, 30g of amino siloxane oligomer, 14g of water-based organic silicon resin, 1g of leveling dispersant and the balance of deionized water;
the component C is a PH regulator, and the raw materials in the weight ratio of each 1Kg of the treating agent comprise: 50g of anhydrous sodium carbonate and the balance of deionized water.
In the embodiment of the invention, the wetting, leveling and defoaming film-forming assistant and the leveling and dispersing agent are all acetylenic diol surfactants.
The embodiment of the invention also provides a preparation method of the surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank, and the preparation method of the component A specifically comprises the following steps:
s1, preparing water-soluble sulfonated polyaniline: adding a proper amount of deionized water according to the weight ratio, stirring in a vertical reaction kettle with a high-speed shearing dispersion machine, heating to 60 ℃, and stirring sulfonic acid, polyaniline and hydrogen peroxide according to the weight ratio at the rotating speed of 800r/min for 10 hours to obtain a water-soluble sulfonated polyphenyl solution for later use;
s2, preparing a film forming solution: adding a proper amount of deionized water into an empty reaction kettle, stirring at normal temperature and the rotating speed of 150r/min, sequentially adding lactic acid, zirconium carbonate and titanium dioxide according to the weight ratio, and stirring for 1 hour to obtain a film forming solution.
S3, slowly pumping the solution obtained in the step S1 into the film forming solution obtained in the step S2, stirring the solution at the rotating speed of 150r/min for 1.5 hours until the solution is transparent to semitransparent liquid, sequentially adding a dispersant polyacrylic acid and a wetting leveling defoaming film forming aid acetylenic diol for surface activity, and mixing and stirring the solution for 3 hours to obtain the product;
the method for preparing the modified organic silicon resin liquid by the component B comprises the following specific steps:
adding a proper amount of deionized water according to the weight ratio, stirring in a reaction kettle, heating to 60 ℃, respectively adding isopropanol, an epoxy silane coupling agent and an aminosilane oligomer according to the weight ratio, stirring at the rotating speed of 150r/min for 12 hours, and then adding the water-based organic silicon resin to obtain a modified organic silicon resin solution;
the preparation method of the component C comprises the following specific steps:
adding a proper amount of deionized water according to the weight ratio, stirring in a reaction kettle, adding anhydrous sodium carbonate according to the weight ratio, and stirring at the rotating speed of 150r/min for 20 minutes at normal temperature to obtain the pH regulator.
The embodiment of the invention also provides a use method of the surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank, which comprises the following specific steps: the treating agent composition comprises 3% of agent A, 3% of agent B and 3% of agent C, wherein the agent B comprises the following components in parts by weight: 1 percent, and the using weight ratio of the agent C is the total weight of the agent A and the agent B after preparation: 0.3%, PH 4.8 of the solution, operating temperature: normal temperature, treatment time: 2 minutes, the results are shown in tables 1, 2, 3 and 4.
The effect analysis of the invention is carried out by adopting the following method:
Figure GDA0003325544830000151
NSS salt spray adhesion test (hundred grid test): and (3) scratching the bottom of the base material by using a hundred-grid knife to form 100 grids of 1mm, tearing and stripping by using a 3M adhesive tape, and evaluating according to the number of paint films, wherein no 1 grid peels off.
Testing the post-NSS salt spray tear performance: marking a fork on the plane part of a workpiece, placing the fork in a neutral salt fog box, continuously spraying for 500 hours, and tearing and stripping the central part of the fork by using a 3M adhesive tape, wherein the single-side stripping of the fork part is less than or equal to 1 mm.
TABLE 1 test of the relative properties of phosphatizing agent treated under the same process conditions
Figure GDA0003325544830000161
TABLE 2 correlation of the performance of the nano-ceramic treatment agent after treatment under the same process conditions
Figure GDA0003325544830000162
TABLE 3 relevant Performance testing of conventional silane treatment agents after treatment under the same Process conditions
Figure GDA0003325544830000171
TABLE 4 relevant Performance tests after treatment with the treating agent of the invention under the same Process conditions
Figure GDA0003325544830000172
And those not described in detail in this specification are well within the skill of those in the art.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (8)

1. A surface pretreatment agent matched with low-temperature cathode electrophoretic paint for a compressor liquid storage tank is characterized in that: the treating agent comprises A, B and C, wherein the component A comprises the following raw materials in parts by weight per 1Kg of the treating agent: 16-40g of water-soluble sulfonated polyaniline solution, 10-25g of lactic acid, 5-12g of film-forming agent a, 3-8g of film-forming agent b, 1-5g of dispersing agent, 2-3g of wetting, leveling and defoaming film-forming assistant and the balance of deionized water;
the component B is modified organic silicon resin liquid, and the raw materials in the weight ratio of each 1Kg of the treating agent comprise: 15-30g of isopropanol, 5-8g of epoxy silane coupling agent, 20-40g of amino siloxane oligomer, 8-16g of water-based organic silicon resin, 0.5-1g of leveling dispersant and the balance of deionized water;
the component C is a pH regulator, and the raw materials in the weight ratio of each 1Kg of the treating agent comprise: 30-60g of anhydrous sodium carbonate and the balance of deionized water;
16-40g of water-soluble sulfonated polyaniline solution consists of 12-30g of sulfonic acid, 2-5g of polyaniline and 2-5g of hydrogen peroxide;
the film forming agent a is zirconium carbonate, and the film forming agent b is titanium dioxide.
2. The surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank as claimed in claim 1, is characterized in that: the component A comprises the following raw materials in parts by weight per 1Kg of the treating agent: 19g of water-soluble sulfonated polyaniline solution, 10g of lactic acid, 5g of film-forming agent a, 3g of film-forming agent b, 1g of dispersing agent, 2g of wetting, leveling and defoaming film-forming aid and the balance of deionized water;
the component B is modified organic silicon resin liquid, and the raw materials in the weight ratio of each 1Kg of the treating agent comprise: 15g of isopropanol, 5g of epoxy silane coupling agent, 20g of amino siloxane oligomer, 8g of water-based organic silicon resin, 0.5g of leveling dispersant and the balance of deionized water;
the component C is a pH regulator, and the raw materials in the weight ratio of each 1Kg of the treating agent comprise: 30g of anhydrous sodium carbonate and the balance of deionized water.
3. The surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank as claimed in claim 1, is characterized in that: the component A comprises the following raw materials in parts by weight per 1Kg of the treating agent: 21g of water-soluble sulfonated polyaniline solution, 15g of lactic acid, 8g of film-forming agent a, 5g of film-forming agent b, 2g of dispersing agent, 2g of wetting, leveling and defoaming film-forming aid and the balance of deionized water;
the component B is modified organic silicon resin liquid, and the raw materials in the weight ratio of each 1Kg of the treating agent comprise: 18g of isopropanol, 6g of epoxy silane coupling agent, 20g of amino siloxane oligomer, 10g of water-based organic silicon resin, 0.5g of leveling dispersant and the balance of deionized water;
the component C is a pH regulator, and the raw materials in the weight ratio of each 1Kg of the treating agent comprise: 40g of anhydrous sodium carbonate and the balance of deionized water.
4. The surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank as claimed in claim 1, is characterized in that: the component A comprises the following raw materials in parts by weight per 1Kg of the treating agent: 40g of water-soluble sulfonated polyaniline solution, 25g of lactic acid, 12g of film-forming agent a, 8g of film-forming agent b, 5g of dispersing agent, 3g of wetting, leveling and defoaming film-forming aid and the balance of deionized water;
the component B is modified organic silicon resin liquid, and the raw materials in the weight ratio of each 1Kg of the treating agent comprise: 30g of isopropanol, 8g of epoxy silane coupling agent, 40g of amino siloxane oligomer, 16g of water-based organic silicon resin, 1g of leveling dispersant and the balance of deionized water;
the component C is a pH regulator, and the raw materials in the weight ratio of each 1Kg of the treating agent comprise: 60g of anhydrous sodium carbonate and the balance of deionized water.
5. The surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank as claimed in any one of claims 1 to 4, is characterized in that: the dispersing agent is polyacrylic acid, and the deionized water is deionized water with the conductivity less than or equal to 10 mu S/cm.
6. The surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank as claimed in any one of claims 1 to 4, is characterized in that: the wetting, leveling and defoaming film-forming assistant and the leveling dispersant are all acetylenic diol surfactants.
7. A method for preparing a surface pretreatment agent matched with the low-temperature cathode electrophoretic paint for the compressor liquid storage tank, which is disclosed by any one of claims 1 to 4, is characterized by comprising the following steps of: the preparation method of the component A specifically comprises the following steps:
s1, preparing water-soluble sulfonated polyaniline: adding a proper amount of deionized water according to the weight ratio, stirring in a vertical reaction kettle with a high-speed shearing dispersion machine, heating to 60 ℃, and stirring sulfonic acid, polyaniline and hydrogen peroxide according to the weight ratio at the rotating speed of 600 plus materials and 800r/min for 6-10 hours to obtain a water-soluble sulfonated polyphenyl solution for later use;
s2, preparing a film forming solution: adding a proper amount of deionized water into an empty reaction kettle, stirring at normal temperature and at the rotating speed of 120-plus-one (150 r/min), sequentially adding lactic acid, zirconium carbonate and titanium dioxide according to the weight ratio, and stirring for 0.5-1 h to obtain a film forming solution;
s3, slowly pumping the solution obtained in the step S1 into the film forming solution obtained in the step S2, stirring the solution at the rotating speed of 150r/min for 1 to 1.5 hours until the solution is transparent to semitransparent liquid, sequentially adding a dispersant polyacrylic acid and a wetting leveling defoaming film forming aid acetylene glycol for surface activity, and mixing and stirring the solution for 2 to 3 hours to obtain the product;
the method for preparing the modified organic silicon resin liquid by the component B comprises the following specific steps:
adding a proper amount of deionized water according to the weight ratio, stirring in a reaction kettle, heating to 60 ℃, respectively adding isopropanol, an epoxy silane coupling agent and an aminosilane oligomer according to the weight ratio, stirring at the rotating speed of 120 plus materials and 150r/min for 12 hours, and then adding the water-based organic silicon resin to obtain a modified organic silicon resin liquid;
the preparation method of the component C comprises the following specific steps:
adding a proper amount of deionized water according to the weight ratio, stirring in a reaction kettle, adding anhydrous sodium carbonate according to the weight ratio, stirring at the rotating speed of 120 plus materials/min for 20 minutes at normal temperature, and obtaining the pH regulator.
8. A method of using the surface pretreatment agent for the low-temperature cathode electrophoretic paint for a compressor liquid storage tank according to any one of claims 1 to 4, wherein the surface pretreatment agent comprises: the method specifically comprises the following steps: the treating agent composition comprises 3-5% of an agent A, 1-5% of an agent A and 1-5:1 of an agent B, wherein the agent A, the agent B and the agent C are uniformly mixed according to the required weight ratio for use: 1-1.6%, the using weight ratio of the agent C is the total weight of the agent A and the agent B after preparation: 0.2 to 0.5 percent.
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