CN108707952B - Toughened glass surface electrophoresis spraying process - Google Patents
Toughened glass surface electrophoresis spraying process Download PDFInfo
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- CN108707952B CN108707952B CN201810601068.3A CN201810601068A CN108707952B CN 108707952 B CN108707952 B CN 108707952B CN 201810601068 A CN201810601068 A CN 201810601068A CN 108707952 B CN108707952 B CN 108707952B
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/22—Servicing or operating apparatus or multistep processes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/44—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications
- C09D5/4419—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications with polymers obtained otherwise than by polymerisation reactions only involving carbon-to-carbon unsaturated bonds
- C09D5/4423—Polyesters, esterified polyepoxides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/44—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications
- C09D5/4419—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications with polymers obtained otherwise than by polymerisation reactions only involving carbon-to-carbon unsaturated bonds
- C09D5/443—Polyepoxides
- C09D5/4434—Polyepoxides characterised by the nature of the epoxy binder
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/44—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes for electrophoretic applications
- C09D5/4473—Mixture of polymers
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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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
- C09J9/02—Electrically-conducting adhesives
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/04—Electrophoretic coating characterised by the process with organic material
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D13/00—Electrophoretic coating characterised by the process
- C25D13/20—Pretreatment
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Abstract
The invention provides a coating process, in particular to an electrophoresis spraying process for the surface of toughened glass, which comprises the following steps: performing glow discharge treatment on the toughened glass, uniformly coating the toughened glass with the conductive adhesive, curing the toughened glass coated with the conductive adhesive, performing electrolytic activation after curing, adding an electrophoretic coating for electrophoretic spraying, baking, curing and then performing electrophoresis, and finally heating, baking and curing to form a coating film; the toughened glass is subjected to glow discharge treatment, so that the surface of the toughened glass is clean, and the surface of the cleaned toughened glass is coated with the conductive adhesive, so that the toughened glass can be subjected to electrophoresis operation, and the electrophoretic coating is uniformly adsorbed on the surface and has consistent thickness; the acid anhydride and the epoxy resin form ester bonds, show high resistance to organic acid and inorganic acid, can also strengthen electrical property, and further improve the electrophoresis effect and the adsorption property of the electrophoretic coating; the cured coating has the advantages of decoration, weather resistance, chemical resistance, high film hardness, good wear resistance and excellent adhesion.
Description
Technical Field
The invention relates to a coating process, in particular to an electrophoresis spraying process for the surface of toughened glass.
Background
The electrophoretic paint is originated from the 30 s of the 20 th century, the synthetic cation type resin is researched from the middle of the 60 s of the 20 th century, the electrophoretic paint is used as a primer on household appliances with high requirements on corrosion resistance in the early 70 s of the 20 th century, and then cathode electrophoretic paint with higher corrosion resistance and decorative effect is gradually developed.
Compared with the traditional solvent-based coating and other dip-coating, spray-coating water-based baking paint and electrostatic spraying, the cathode electrophoretic coating has incomparable superiority: the priming process can realize full automation and is suitable for large-flow production; uniform film thickness can be obtained; the electrophoretic permeability is good, and the corrosion resistance of the inner cavity of the workpiece is improved, particularly the corrosion resistance of the cathode electrophoretic coating; the utilization rate of the coating is high; the safety is relatively high, and the coating is low in pollution; the coating film has good appearance and better flattening property during drying. However, the cathode electrophoresis spraying is applied to the surface of a conductor, and is not suitable for the surface of non-conductive toughened glass.
Disclosure of Invention
The invention aims to solve the technical problem of providing a toughened glass surface electrophoresis spraying process which can lead the surface of toughened glass to be conductive by coating a layer of conductive adhesive on the surface of the toughened glass, thereby being capable of switching on an electrophoresis cathode, ensuring that an electrophoresis coating can be uniformly adsorbed on the surface, and leading the coating to have decoration, weather resistance and chemical resistance after curing through a series of steps, and having high film hardness, good wear resistance and excellent adhesive force.
In order to solve the technical problems, the invention adopts the following technical scheme:
An electrophoresis spraying process for the surface of toughened glass comprises the following steps:
(1) Putting the toughened glass into a box body, introducing argon gas, sealing and introducing voltage of 500-1000V to enable the argon gas to generate plasma, and bombarding the toughened glass by electrons, cations, excited atoms and molecules in the glow discharge plasma to enable the surface of the toughened glass to be clean and pollution-free for later use;
(2) 30-50 parts of high-temperature-resistant epoxy adhesive, 20-30 parts of epoxy resin, 10-20 parts of anhydride, 5-10 parts of graphene and 20-30 parts of absolute alcohol are taken according to the weight part ratio and put into a container, and the mixture is stirred in a water bath at 35-45 ℃ to prepare conductive adhesive with conductivity for later use;
(3) Heating the toughened glass to 60 ℃, uniformly coating a conductive adhesive layer on the surface of the toughened glass, wherein the thickness of the conductive adhesive layer is 5-8um, heating to 100-120 ℃ to accelerate the speed and the smoothness of the conductive adhesive layer, and naturally cooling to room temperature for later use;
(4) Taking 100-200 parts of epoxy polybutadiene resin, 120-240 parts of ammonia water, 110-210 parts of acetic acid, 150-200 parts of polyester resin, 10-15 parts of phosphate modified acrylic acid, 7-10 parts of silane coupling agent with epoxy groups, 5-10 parts of triethyl phosphate, 5-10 parts of acrylate copolymer and 50-100 parts of pigment according to the weight part ratio, firstly, putting epoxy polybutadiene resin into a container, adding ammonia water to dissolve in water bath at 50-60 ℃, adding acetic acid to stir, finally adding polyester resin, phosphate modified acrylic acid, a silane coupling agent with epoxy groups, triethyl phosphate, an acrylate copolymer and a pigment, heating the water bath while stirring, keeping the temperature of the water bath at 70-80 ℃ for 3-5min, stopping stirring, and naturally cooling to room temperature for later use;
(5) Putting the toughened glass coated with the conductive adhesive into an electrophoresis cell, connecting a voltage cathode, pouring water to enable the water to submerge the toughened glass, electrifying to carry out ionization activation treatment, wherein the voltage is 75V for 5-7 min;
(6) Cutting off the power, discharging water, putting the electrophoretic paint prepared in the step 4) into an electrophoresis tank, electrifying to perform cathode electrophoretic spraying, firstly using 75V voltage for 10-15min, then increasing the voltage to 175V for 10-15min, and finally stabilizing the voltage to 220V for 5-10min for later use;
(7) Carrying out hot-pressing treatment on the electrophoretic sprayed toughened glass at the temperature of 120-150 ℃ under the pressure of 0.8MPa for 10-12min for later use;
(8) Baking and curing the hot-pressed toughened glass at the curing temperature of 120-140 ℃ for 5-7min, heating to 160-170 ℃ for 12-15min, and finally, carrying out shrinkage at the temperature of 80-100 ℃ for 3-5 min;
(9) And (4) putting the baked and cured toughened glass into the electrophoresis tank subjected to electrophoretic spraying in the step (6), performing electrophoretic spraying again by using 220V voltage, and finally heating and baking at the temperature of 160-170 ℃ for curing for 10-20min to form an electrophoretic coating film.
Further, the conductive adhesive is prepared from the following materials in parts by weight: 50 parts of high-temperature-resistant epoxy glue, 20 parts of epoxy resin, 10 parts of anhydride, 5 parts of graphene and 20 parts of absolute alcohol; the electrophoretic paint is prepared from the following materials in parts by weight: 200 parts of epoxy polybutadiene resin, 120 parts of ammonia water, 110 parts of acetic acid, 150 parts of polyester resin, 10 parts of phosphate modified acrylic acid, 7 parts of silane coupling agent with epoxy groups, 5 parts of triethyl phosphate, 5 parts of acrylate copolymer and 50 parts of pigment.
Further, the conductive adhesive is prepared from the following materials in parts by weight: 30-50 parts of high-temperature-resistant epoxy glue, 20 parts of epoxy resin, 20 parts of anhydride, 10 parts of graphene and 30 parts of absolute alcohol; the electrophoretic paint is prepared from the following materials in parts by weight: 100 parts of epoxy polybutadiene resin, 240 parts of ammonia water, 210 parts of acetic acid, 200 parts of polyester resin, 15 parts of phosphate modified acrylic acid, 10 parts of silane coupling agent with epoxy groups, 10 parts of triethyl phosphate, 10 parts of acrylate copolymer and 100 parts of pigment.
Further, the conductive adhesive is prepared from the following materials in parts by weight: 40 parts of high-temperature-resistant epoxy glue, 25 parts of epoxy resin, 15 parts of anhydride, 7.5 parts of graphene and 25 parts of absolute alcohol; the electrophoretic paint is prepared from the following materials in parts by weight: 150 parts of epoxy polybutadiene resin, 180 parts of ammonia water, 160 parts of acetic acid, 175 parts of polyester resin, 12.5 parts of phosphate modified acrylic acid, 8.5 parts of silane coupling agent with epoxy groups, 7.5 parts of triethyl phosphate, 7.5 parts of acrylate copolymer and 75 parts of pigment.
The invention has the beneficial effects that: the toughened glass is subjected to glow discharge treatment to ensure that the surface of the toughened glass is clean and free of stains, and the surface of the toughened glass is coated with conductive adhesive to enable the surface of the toughened glass to be conductive, and the toughened glass can be placed in an electrophoresis tank to be connected with a negative electrode of a voltage, so that the electrophoretic coating is uniformly adsorbed on the surface and has consistent thickness; the acid anhydride and the epoxy resin form ester bonds, so that the chemical resistance is improved, the electrical property can be enhanced, and the conductivity of the toughened glass is improved by cooperating with the graphene, so that the electrophoresis effect and speed and the adsorbability of the toughened glass are further improved; after ammoniation by ammonia water, the epoxy polybutadiene resin is neutralized by acetic acid to form cation butadiene resin, and the toughened glass is connected with a negative electrode, so that the formed cation butadiene resin can be well adsorbed on the toughened glass; the cured coating has the advantages of decoration, weather resistance, chemical resistance, high film hardness, good wear resistance and excellent adhesion.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments for further understanding the characteristics, technical means, and specific objects and functions of the invention.
The first embodiment is as follows:
An electrophoresis spraying process for the surface of toughened glass comprises the following steps:
(1) Putting the toughened glass into a box body, introducing argon gas, sealing and introducing voltage of 1000V to enable the argon gas to generate plasma, and bombarding the toughened glass by electrons, cations, excited atoms and molecules in glow discharge plasma to enable the surface of the toughened glass to be clean and pollution-free for later use;
(2) 50 parts of high-temperature-resistant epoxy glue, 20 parts of epoxy resin, 10 parts of anhydride, 5 parts of graphene and 20 parts of absolute alcohol are taken according to the weight parts and put into a container to be stirred in a water bath at 45 ℃ to prepare conductive adhesive for later use;
(3) Heating the toughened glass to 60 ℃, uniformly coating a conductive adhesive layer on the surface of the toughened glass, wherein the thickness of the conductive adhesive layer is 8 microns, heating to 120 ℃ to accelerate the speed and the smoothness of the conductive adhesive layer, and naturally cooling to room temperature for later use;
(4) Taking 200 parts of epoxy polybutadiene resin, 120 parts of ammonia water, 110 parts of acetic acid, 150 parts of polyester resin, 10 parts of phosphate modified acrylic acid, 7 parts of silane coupling agent with epoxy groups, 5 parts of triethyl phosphate, 5 parts of acrylate copolymer and 50 parts of pigment according to the weight parts, firstly putting the epoxy polybutadiene resin into a container, then adding the ammonia water to dissolve in water bath at 60 ℃, then adding the acetic acid to stir, finally adding the polyester resin, the phosphate modified acrylic acid, the silane coupling agent with epoxy groups, the triethyl phosphate, the acrylate copolymer and the pigment to heat the water bath while stirring, keeping the water bath temperature at 80 ℃ for 5min, stopping stirring to naturally cool the mixture to room temperature for later use;
(5) Putting the toughened glass coated with the conductive adhesive into an electrophoresis cell, connecting a voltage cathode, pouring water to enable the water to submerge the toughened glass, electrifying to carry out ionization activation treatment, wherein the voltage is 75V for 7 min;
(6) Cutting off the power, discharging water, putting the electrophoretic paint prepared in the step 4) into an electrophoresis tank, electrifying to perform cathode electrophoretic spraying, firstly using 75V voltage for 15min, then increasing the voltage to 175V for 15min, and finally stabilizing the voltage to 220V for 10min for later use;
(7) Carrying out hot-pressing treatment on the electrophoretic sprayed toughened glass at the temperature of 150 ℃, under the pressure of 0.8MPa for 12min for later use;
(8) Baking and curing the hot-pressed toughened glass at the curing temperature of 140 ℃ for 7min, then heating to 170 ℃ for 15min, and finally performing shrinkage at the temperature of 100 ℃ for 5 min:
(9) And (4) putting the baked and cured toughened glass into the electrophoresis tank subjected to electrophoretic spraying in the step (6), performing electrophoretic spraying again by using 220V voltage, and finally heating and baking at the temperature of 170 ℃ for curing for 20min to form an electrophoretic coating film.
Example two:
An electrophoresis spraying process for the surface of toughened glass comprises the following steps:
(1) Putting the toughened glass into a box body, introducing argon gas, sealing and introducing voltage with the voltage of 500 to enable the argon gas to generate plasma, and bombarding the toughened glass by electrons, cations, excited atoms and molecules in glow discharge plasma to enable the surface of the toughened glass to be clean and pollution-free for later use;
(2) 30 parts of high-temperature-resistant epoxy glue, 30 parts of epoxy resin, 20 parts of anhydride, 10 parts of graphene and 30 parts of absolute alcohol are taken according to the weight parts and put into a container, and the mixture is stirred in a water bath at 35 ℃ to prepare conductive adhesive for later use;
(3) Heating the toughened glass to 60 ℃, uniformly coating a conductive adhesive layer on the surface of the toughened glass, wherein the thickness of the conductive adhesive layer is 5 microns, heating to 100 ℃ to accelerate the speed and the smoothness of the conductive adhesive layer, and naturally cooling to room temperature for later use;
(4) Taking 100 parts of epoxy polybutadiene resin, 240 parts of ammonia water, 210 parts of acetic acid, 200 parts of polyester resin, 15 parts of phosphate modified acrylic acid, 10 parts of silane coupling agent with epoxy groups, 10 parts of triethyl phosphate, 10 parts of acrylate copolymer and 100 parts of pigment according to the weight parts, firstly putting the epoxy polybutadiene resin into a container, then adding the ammonia water to dissolve in water bath at 50 ℃, then adding the acetic acid to stir, finally adding the polyester resin, the phosphate modified acrylic acid, the silane coupling agent with epoxy groups, the triethyl phosphate, the acrylate copolymer and the pigment to heat the water bath while stirring, keeping the water bath temperature at 70 ℃ for 3min, stopping stirring, and naturally cooling to room temperature for later use;
(5) Putting the toughened glass coated with the conductive adhesive into an electrophoresis cell, connecting a voltage cathode, pouring water to enable the water to submerge the toughened glass, electrifying to carry out ionization activation treatment, wherein the voltage is 75V for 5 min;
(6) Cutting off the power, discharging water, putting the electrophoretic paint prepared in the step 4) into an electrophoresis tank, electrifying to perform cathode electrophoretic spraying, firstly using 75V voltage for 10min, then increasing the voltage to 175V for 10min, and finally stabilizing the voltage to 220V for 5min for later use;
(7) Carrying out hot-pressing treatment on the electrophoretic sprayed toughened glass at the temperature of 120 ℃, under the pressure of 0.8MPa for 10min for later use;
(8) Baking and curing the hot-pressed toughened glass at the curing temperature of 120 ℃ for 5min, then heating to 160 ℃ for 12min, and finally performing shrinkage at the temperature of 80 ℃ for 3 min;
(9) And (4) putting the baked and cured toughened glass into the electrophoresis tank subjected to electrophoretic spraying in the step (6), performing electrophoretic spraying again by using 220V voltage, and finally heating and baking at the temperature of 160 ℃ for curing for 10min to form an electrophoretic coating film.
Example three:
An electrophoresis spraying process for the surface of toughened glass comprises the following steps:
(1) Putting the toughened glass into a box body, introducing argon gas, sealing and introducing voltage of 750V to enable the argon gas to generate plasma, and bombarding the toughened glass by electrons, cations, excited atoms and molecules in glow discharge plasma to enable the surface of the toughened glass to be clean and pollution-free for later use;
(2) 40 parts of high-temperature-resistant epoxy glue, 25 parts of epoxy resin, 15 parts of anhydride, 7.5 parts of graphene and 25 parts of absolute alcohol are taken according to the weight parts and put into a container, and are stirred in a water bath at 40 ℃ to prepare conductive adhesive with conductivity for later use;
(3) Heating the toughened glass to 60 ℃, uniformly coating a conductive adhesive layer on the surface of the toughened glass, wherein the thickness of the conductive adhesive layer is 6.5 microns, heating to 110 ℃ to accelerate the speed and the smoothness of the conductive adhesive layer, and naturally cooling to room temperature for later use;
(4) Taking 150 parts of epoxy polybutadiene resin, 180 parts of ammonia water, 160 parts of acetic acid, 175 parts of polyester resin, 12.5 parts of phosphate modified acrylic acid, 8.5 parts of silane coupling agent with epoxy groups, 7.5 parts of triethyl phosphate, 7.5 parts of acrylate copolymer and 75 parts of pigment according to the weight parts, firstly putting the epoxy polybutadiene resin into a container, adding the ammonia water for water bath dissolution at 55 ℃, adding the acetic acid for stirring, finally adding the polyester resin, the phosphate modified acrylic acid, the silane coupling agent with epoxy groups, the triethyl phosphate, the acrylate copolymer and the pigment, heating the water bath while stirring, keeping the water bath temperature at 75 ℃ for 4min, stopping stirring, and naturally cooling to room temperature for later use;
(5) Putting the toughened glass coated with the conductive adhesive into an electrophoresis cell, connecting a voltage cathode, pouring water to enable the water to submerge the toughened glass, electrifying to carry out ionization activation treatment, wherein the voltage is 75V, and the time is 6 min;
(6) Cutting off the power, discharging water, putting the electrophoretic paint prepared in the step 4) into an electrophoresis tank, electrifying to perform cathode electrophoretic spraying, firstly using 75V voltage for 12.5min, then increasing the voltage to 175V for 12.5min, and finally stabilizing the voltage to 220V for 7.5min for later use;
(7) Carrying out hot-pressing treatment on the electrophoretic sprayed toughened glass at the temperature of 135 ℃, under the pressure of 0.8MPa for 11min for later use;
(8) Baking and curing the hot-pressed toughened glass at the curing temperature of 130 ℃ for 6min, then heating to 165 ℃ for 13.5min, and finally performing shrinkage at the temperature of 90 ℃ for 4 min;
(9) And (4) putting the baked and cured toughened glass into the electrophoresis tank subjected to electrophoretic spraying in the step (6), performing electrophoretic spraying again by using 220V voltage, and finally heating and baking at 165 ℃ for curing for 15min to form an electrophoretic coating film.
Experimental example:
The toughened glass coating film of the epoxy resin electrostatic spraying process is selected as a first control group, the toughened glass coating film of the epoxy resin electrophoretic spraying process is selected as a second control group, and the toughened glass coating film of the construction process of the embodiment 3 of the invention is selected as an experimental group.
The identification standard is as follows: chemical resistance is measured according to GB1763-89(79), pencil hardness is measured according to GB/T6739-1996, abrasion resistance is measured according to GB1768-89(79), and adhesion is measured according to GB1720-89 (79).
TABLE 1 three groups of toughened glass film testing performance table
TABLE 1
By combining the data in table 1, the comparison between the first control group, the second control group and the experimental group can be made to obtain the toughened glass coating film of the construction process of the embodiment 3 of the invention, which has better chemical resistance, higher hardness, better wear resistance and better adhesion than the toughened glass coating film of the epoxy resin electrostatic spraying process and the toughened glass coating film of the epoxy resin electrophoretic spraying process.
The invention has the beneficial effects that: the toughened glass is subjected to glow discharge treatment to ensure that the surface of the toughened glass is clean and free of stains, and the surface of the toughened glass is coated with conductive adhesive to enable the surface of the toughened glass to be conductive, and the toughened glass can be placed in an electrophoresis tank to be connected with a negative electrode of a voltage, so that the electrophoretic coating is uniformly adsorbed on the surface and has consistent thickness; the acid anhydride and the epoxy resin form ester bonds, so that the chemical resistance is improved, the electrical property can be enhanced, and the conductivity of the toughened glass is improved by cooperating with the graphene, so that the electrophoresis effect and speed and the adsorbability of the toughened glass are further improved; after ammoniation by ammonia water, the epoxy polybutadiene resin is neutralized by acetic acid to form cation butadiene resin, and the toughened glass is connected with a negative electrode, so that the formed cation butadiene resin can be well adsorbed on the toughened glass; the cured coating has the advantages of decoration, weather resistance, chemical resistance, high film hardness, good wear resistance and excellent adhesion.
The applicant states that the present invention is illustrated in detail by the above examples, but the present invention is not limited to the above detailed methods, i.e. it is not meant that the present invention must rely on the above detailed methods for its implementation. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (4)
1. The electrophoresis spraying process for the surface of toughened glass is characterized by comprising the following steps: the method comprises the following steps:
(1) Putting the toughened glass into a box body, introducing argon gas, sealing and introducing voltage of 500-1000V to enable the argon gas to generate plasma, and bombarding the toughened glass by electrons, cations, excited atoms and molecules in the glow discharge plasma to enable the surface of the toughened glass to be clean and pollution-free for later use;
(2) 30-50 parts of high-temperature-resistant epoxy adhesive, 20-30 parts of epoxy resin, 10-20 parts of anhydride, 5-10 parts of graphene and 20-30 parts of absolute alcohol are taken according to the weight part ratio and put into a container, and the mixture is stirred in a water bath at 35-45 ℃ to prepare conductive adhesive with conductivity for later use;
(3) Heating the toughened glass to 60 ℃, uniformly coating a conductive adhesive layer on the surface of the toughened glass, wherein the thickness of the conductive adhesive layer is 5-8um, heating to 100-120 ℃ to accelerate the speed and the smoothness of the conductive adhesive layer, and naturally cooling to room temperature for later use;
(4) Taking 100-200 parts of epoxy polybutadiene resin, 120-240 parts of ammonia water, 110-210 parts of acetic acid, 150-200 parts of polyester resin, 10-15 parts of phosphate modified acrylic acid, 7-10 parts of silane coupling agent with epoxy groups, 5-10 parts of triethyl phosphate, 5-10 parts of acrylate copolymer and 50-100 parts of pigment according to the weight part ratio, firstly, putting epoxy polybutadiene resin into a container, adding ammonia water to dissolve in water bath at 50-60 ℃, adding acetic acid to stir, finally adding polyester resin, phosphate modified acrylic acid, a silane coupling agent with epoxy groups, triethyl phosphate, an acrylate copolymer and a pigment, heating the water bath while stirring, keeping the temperature of the water bath at 70-80 ℃ for 3-5min, stopping stirring, and naturally cooling to room temperature for later use;
(5) Putting the toughened glass coated with the conductive adhesive into an electrophoresis cell, connecting a voltage cathode, pouring water to enable the water to submerge the toughened glass, electrifying to carry out ionization activation treatment, wherein the voltage is 75V for 5-7 min;
(6) Cutting off the power, discharging water, putting the electrophoretic paint prepared in the step 4) into an electrophoresis tank, electrifying to perform cathode electrophoretic spraying, firstly using 75V voltage for 10-15min, then increasing the voltage to 175V for 10-15min, and finally stabilizing the voltage to 220V for 5-10min for later use;
(7) Carrying out hot-pressing treatment on the electrophoretic sprayed toughened glass at the temperature of 120-150 ℃ under the pressure of 0.8MPa for 10-12min for later use;
(8) Baking and curing the hot-pressed toughened glass at the curing temperature of 120-140 ℃ for 5-7min, heating to 160-170 ℃ for 12-15min, and finally, carrying out shrinkage at the temperature of 80-100 ℃ for 3-5 min;
(9) And (4) putting the baked and cured toughened glass into the electrophoresis tank subjected to electrophoretic spraying in the step (6), performing electrophoretic spraying again by using 220V voltage, and finally heating and baking at the temperature of 160-170 ℃ for curing for 10-20min to form an electrophoretic coating film.
2. The electrophoresis spraying process of the surface of the toughened glass as claimed in claim 1, wherein: the conductive adhesive is prepared from the following materials in parts by weight: 50 parts of high-temperature-resistant epoxy glue, 20 parts of epoxy resin, 10 parts of anhydride, 5 parts of graphene and 20 parts of absolute alcohol; the electrophoretic paint is prepared from the following materials in parts by weight: 200 parts of epoxy polybutadiene resin, 120 parts of ammonia water, 110 parts of acetic acid, 150 parts of polyester resin, 10 parts of phosphate modified acrylic acid, 7 parts of silane coupling agent with epoxy groups, 5 parts of triethyl phosphate, 5 parts of acrylate copolymer and 50 parts of pigment.
3. The electrophoresis spraying process of the surface of the toughened glass as claimed in claim 1, wherein: the conductive adhesive is prepared from the following materials in parts by weight: 30-50 parts of high-temperature-resistant epoxy glue, 20 parts of epoxy resin, 20 parts of anhydride, 10 parts of graphene and 30 parts of absolute alcohol; the electrophoretic paint is prepared from the following materials in parts by weight: 100 parts of epoxy polybutadiene resin, 240 parts of ammonia water, 210 parts of acetic acid, 200 parts of polyester resin, 15 parts of phosphate modified acrylic acid, 10 parts of silane coupling agent with epoxy groups, 10 parts of triethyl phosphate, 10 parts of acrylate copolymer and 100 parts of pigment.
4. The electrophoresis spraying process of the surface of the toughened glass as claimed in claim 1, wherein: the conductive adhesive is prepared from the following materials in parts by weight: 40 parts of high-temperature-resistant epoxy glue, 25 parts of epoxy resin, 15 parts of anhydride, 7.5 parts of graphene and 25 parts of absolute alcohol; the electrophoretic paint is prepared from the following materials in parts by weight: 150 parts of epoxy polybutadiene resin, 180 parts of ammonia water, 160 parts of acetic acid, 175 parts of polyester resin, 12.5 parts of phosphate modified acrylic acid, 8.5 parts of silane coupling agent with epoxy groups, 7.5 parts of triethyl phosphate, 7.5 parts of acrylate copolymer and 75 parts of pigment.
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| CN111233344B (en) * | 2018-11-29 | 2022-01-07 | 比亚迪股份有限公司 | Decorative glass and preparation method and application thereof |
| CN113717613A (en) * | 2021-10-19 | 2021-11-30 | 枣阳市润图化工有限责任公司 | Water-soluble electrophoretic paint with good bath solution stability and preparation process thereof |
| CN113881383A (en) * | 2021-11-24 | 2022-01-04 | 浙江正恒纳米科技股份有限公司 | Metal adhesive and production process thereof |
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| JPS57152498A (en) * | 1981-03-13 | 1982-09-20 | Dainippon Ink & Chem Inc | Painting method |
| US20050208319A1 (en) * | 2004-03-22 | 2005-09-22 | Finley James J | Methods for forming an electrodeposited coating over a coated substrate and articles made thereby |
| CN101003908A (en) * | 2006-12-15 | 2007-07-25 | 李再亮 | Electrophoresis painting dressing technical method for pipe fitting type metal, and metal piece with deep hole, and deep concave |
| CN101377001A (en) * | 2007-08-29 | 2009-03-04 | 汉达精密电子(昆山)有限公司 | Electrophoresis coating technology for bright plastic surface |
| CN102010685B (en) * | 2010-12-03 | 2013-01-09 | 烟台德邦科技有限公司 | Epoxy resin conductive adhesive and preparation method thereof |
| CN102382606B (en) * | 2011-09-19 | 2013-10-30 | 常州合润新材料科技有限公司 | Graphene filling isotropic high-performance conducting adhesive and preparation method thereof |
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Effective date of registration: 20211203 Address after: 150000 Hongxing Village, liming sub district office, Xiangfang District, Harbin City, Heilongjiang Province Patentee after: Harbin jingruida Safety Glass Co.,Ltd. Address before: 321000 A4-402, 729 Jin Lei street, Xinshi street, Wucheng District, Jinhua, Zhejiang. Patentee before: JINHUA JIEHE ENVIRONMENTAL PROTECTION TECHNOLOGY CONSULTATION Co.,Ltd. |