CN113174179A - Oxygen-barrier sealing coating - Google Patents
Oxygen-barrier sealing coating Download PDFInfo
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- CN113174179A CN113174179A CN202110286090.5A CN202110286090A CN113174179A CN 113174179 A CN113174179 A CN 113174179A CN 202110286090 A CN202110286090 A CN 202110286090A CN 113174179 A CN113174179 A CN 113174179A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/36—Successively applying liquids or other fluent materials, e.g. without intermediate treatment
- B05D1/38—Successively applying liquids or other fluent materials, e.g. without intermediate treatment with intermediate treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/12—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
- B05D7/584—No clear coat specified at least some layers being let to dry, at least partially, before applying the next layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/50—Multilayers
- B05D7/56—Three layers or more
- B05D7/58—No clear coat specified
- B05D7/587—No clear coat specified some layers being coated "wet-on-wet", the others not
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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
- C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
- C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
- C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C09D127/18—Homopolymers or copolymers of tetrafluoroethene
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- 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
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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
- 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
- C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0812—Aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2244—Oxides; Hydroxides of metals of zirconium
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Abstract
The invention relates to an oxygen-barrier sealing coating which is formed by compounding an anti-corrosion coating, a first adhesive layer, an anti-oxidation coating, a second adhesive layer, an insulating coating and a third adhesive layer from outside to inside in sequence, wherein the thickness of the anti-corrosion coating is a, the thickness of the anti-oxidation coating is b and the thickness of the insulating coating is c, and the requirements are met: b is more than a and more than c, and 3a is more than or equal to b and more than or equal to a and c.
Description
Technical Field
The invention relates to the field of coatings, in particular to an oxygen-barrier sealing coating.
Background
Oxygen barrier sealing coatings are widely used for sealing electronic components. In order to prevent the covered electronic parts from being oxidized by oxygen in the air, therefore, the requirement of the oxygen-resistant sealing coating on the sealing property and the oxygen-resistant performance is high, and the technical problems of the existing oxygen-resistant sealing coating are as follows: the sealing performance and the effective duration of the oxygen barrier performance of the oxygen barrier sealing coating are short, and the oxygen barrier sealing coating is easy to corrode along with the accumulation of working time, so that the sealing performance and the oxygen barrier performance of the oxygen barrier sealing coating are damaged, and electronic parts are damaged by oxidation.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an oxygen-barrier sealing coating which can effectively prolong the shelf life of the coating and can keep better sealing property and oxygen-barrier property in the valid period.
The technical scheme of the invention is to provide an oxygen-resistant sealing coating, which is formed by compounding an anti-corrosion coating, a first adhesive layer, an anti-oxidation coating, a second adhesive layer, an insulating coating and a third adhesive layer from outside to inside in sequence, wherein the total thickness of the oxygen-resistant sealing coating is 10-80 mu m. The thickness of the corrosion-resistant coating is a, the thickness of the oxidation-resistant coating is b, and the thickness of the insulating coating is c, so that the following requirements are met: b is more than a and more than c, and 3a is more than or equal to b and more than or equal to a and c. The larger the thickness of the oxidation-resistant coating layer is, the better the sealability and oxygen barrier properties of the oxygen-barrier seal coating layer are, but at this time, the connection strength between the oxidation-resistant coating layer and the corrosion-resistant coating layer and the insulating coating layer is reduced to make the peeling between the coating layers easier, and the larger the thickness of the oxidation-resistant coating layer is, the higher the cost of the oxygen-barrier seal coating layer is.
The anticorrosive coating for preparing the anticorrosive coating comprises the following raw materials in parts by weight: 60-70 parts of micron-sized silicon oxide particles, 5-8 parts of silicon nitride ceramic particles, 60-70 parts of silane coupling agent, 30-40 parts of epoxy resin, 5-10 parts of diluent, 3-6 parts of silicon carbide particles and 25-30 parts of curing agent. Preferably, the average particle diameter of the silicon oxide particles and the average particle diameter of the silicon nitride ceramic particles are both less than or equal to 10 um.
The anticorrosive paint is prepared by the following method: adding silicon oxide particles and silicon nitride ceramic particles into a silane coupling agent for premixing to obtain a mixture A, premixing diluent, silicon carbide particles and epoxy resin to obtain a mixture B, and uniformly mixing and dispersing the mixture A, the mixture B and a curing agent to prepare the coating. The diluent and the curing agent can adopt the diluent and the curing agent which are disclosed in the prior art and commonly used for preparing the coating with the anticorrosion function.
Wherein the oxidation resistant coating is prepared from the improved oxidation resistant coating. The preparation method of the improved antioxidant coating comprises the following steps:
step 1: uniformly mixing 10-15 parts of zirconium oxide particles, 60-70 parts of aluminum particles, 10-15 parts of aluminum oxide particles, 1.0-1.2 parts of molybdenum disilicide micro-particles and 1.5-2.0 parts of silicon oxide particles to obtain a mixture A;
step 2: carrying out ultrasonic mixing on 60-65 parts of the mixture A, 25-30 parts of a wetting agent and 1.0-1.5 parts of a dispersing agent to obtain slurry B, wherein the wetting agent is a water-soluble wetting agent, and the dispersing agent is polyoxyethylene octyl phenol ether-10;
and step 3: mixing 50-55 parts of slurry B, 4-5 parts of polytetrafluoroethylene, 2-3 parts of a silane coupling agent, 1.5-2.5 parts of an auxiliary agent and 45-50 parts of deionized water, stirring at the room temperature at the rotating speed of 60-100 r/min for 60-90 min, and then standing at the constant temperature in a water bath environment at 38-42 ℃ for 30-60 min to prepare the antioxidant coating.
The auxiliary agent comprises water-soluble silicate and glycol. The water-soluble silicate is at least one of sodium silicate and potassium silicate. The mass ratio of the water-soluble silicate to the glycol is 1-2: 1.
The silane coupling agent used for preparing the anti-oxidation coating is the same as that used for preparing the anti-corrosion coating, and the silane coupling agent is at least one of gamma-methacryloxypropyltrimethoxysilane, gamma-2, 3-glycidoxy-propyltrimethoxysilane and gamma-aminopropyltriethoxysilane.
The first adhesive layer, the second adhesive layer and the third adhesive layer are all prepared from the same adhesive coating, the adhesive coating is a two-component polyurethane adhesive, and the thicknesses of the first adhesive layer, the second adhesive layer and the third adhesive layer are not less than 0.5 mu m. Preferably, the thickness ratio of the first adhesive layer, the second adhesive layer and the third adhesive layer is 1:2: 1.
Wherein the insulating paint for preparing the insulating coating is fluorine-containing polymer. The fluorine-containing polymer is at least one or a mixture of polytetrafluoroethylene, polyethylene tetrafluoroethylene, fluorinated ethylene propylene copolymer, perfluoroalkoxy polymer, polyvinylidene fluoride, polyvinyl fluoride, polychlorotrifluoroethylene, polyethylene chlorotrifluoroethylene, chlorotrifluoroethylene vinylidene fluoride, vinylidene fluoride and hexafluoropropylene copolymer.
The oxygen-resistant sealing coating provided by the invention can be coated on the part of the electronic component to be sealed by the existing coating technology. In one embodiment, the method of applying the oxygen barrier seal coating includes the steps of:
step 1: sequentially coating an adhesive coating and an insulating coating on the part of the electronic part to be sealed, and then carrying out drying treatment to form a laminated insulating coating and a third adhesive layer so as to ensure that the insulating coating completely covers the part of the electronic part to be sealed;
step 2: sequentially coating an adhesive coating and an antioxidant coating on the surface of the insulating coating, and then performing drying treatment to form a stacked antioxidant coating, a second adhesive layer, an insulating coating and a third adhesive layer so as to ensure that the antioxidant coating completely covers the insulating coating;
and step 3: and sequentially coating an adhesive coating and an anticorrosive coating on the surface of the antioxidant coating, and then drying to form a stacked anticorrosive coating, a first adhesive layer, an antioxidant coating, a second adhesive layer, an insulating coating and a third adhesive layer, so as to ensure that the anticorrosive coating completely covers the antioxidant coating.
Compared with the prior art, the oxygen barrier sealing coating provided by the invention has the following beneficial effects:
1. the main reasons for the aging failure of the existing oxygen barrier seal coating include: contact with corrosive substances and oxidation by air. Therefore, the oxygen barrier sealing coating provided by the invention effectively prolongs the service life of the oxygen barrier sealing coating by arranging the anti-corrosion coating, the anti-oxidation coating and the insulating coating, the anti-corrosion coating can avoid the anti-oxidation coating from contacting with corrosive substances and can slow down the contact between the anti-oxidation coating and oxygen in air, the invention improves the sealing property and the oxygen barrier property of the anti-oxidation coating by controlling the components and the component proportion ratio of the anti-oxidation coating, but because the anti-oxidation coating contains metal oxide particles, the anti-oxidation coating and the electronic part needing to be sealed are isolated by the insulating coating, and meanwhile, the sealing property of the oxygen barrier sealing coating is improved by arranging the insulating coating. By controlling the thickness relationship among the anti-corrosion coating, the oxidation-resistant coating and the insulating coating, the optimal balance among the service life, the sealing property, the oxygen resistance and the cost of the oxidation-resistant coating is achieved, and the connection strength among the anti-corrosion coating, the oxidation-resistant coating and the insulating coating is optimal.
2. By selecting the double-component polyurethane adhesive as the adhesive coating and controlling the thicknesses of the first adhesive layer, the second adhesive layer and the third adhesive layer, the connection strength among the anti-corrosion coating, the anti-oxidation coating and the insulating coating is effectively increased.
3. By controlling the components and the component proportion of the anti-corrosion coating and the components of the adhesive coating, the anti-corrosion coating, the anti-oxidation coating and the insulating coating can play a synergistic role, the sealing property and the oxygen resistance of the oxygen-resistant sealing coating are further improved, and the connection strength among the anti-corrosion coating, the anti-oxidation coating and the insulating coating is enhanced.
4. The silane coupling agent used by the anti-oxidation coating and the anti-corrosion coating is the same, so that the anti-corrosion coating and the anti-oxidation coating are connected through the first adhesive layer more easily.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The embodiment provides an oxygen barrier sealing coating, which is formed by compounding an anti-corrosion coating, a first adhesive layer, an anti-oxidation coating, a second adhesive layer, an insulating coating and a third adhesive layer from outside to inside in sequence, wherein the total thickness of the oxygen barrier sealing coating is 10 microns. The thickness of the corrosion-resistant coating is 3 μm, the thickness of the oxidation-resistant coating is 4 μm, and the thickness of the insulating coating is 1 μm. The thickness of the first adhesive layer and the third adhesive layer is 0.5 μm, and the thickness of the second adhesive layer is 1.0 μm.
Example 2
The embodiment provides an oxygen barrier sealing coating, which is formed by compounding an anti-corrosion coating, a first adhesive layer, an anti-oxidation coating, a second adhesive layer, an insulating coating and a third adhesive layer from outside to inside in sequence, wherein the total thickness of the oxygen barrier sealing coating is 80 microns. The thickness of the corrosion-resistant coating is 20 μm, the thickness of the oxidation-resistant coating is 40 μm, and the thickness of the insulating coating is 14.4 μm. The thickness of the first adhesive layer and the third adhesive layer is 1.4 mu m, and the thickness of the second adhesive layer is 2.8 mu m.
Example 3
The embodiment provides an oxygen barrier sealing coating, which is formed by compounding an anti-corrosion coating, a first adhesive layer, an anti-oxidation coating, a second adhesive layer, an insulating coating and a third adhesive layer from outside to inside in sequence, wherein the total thickness of the oxygen barrier sealing coating is 44 microns. The thickness of the corrosion-resistant coating is 12 μm, the thickness of the oxidation-resistant coating is 20 μm, and the thickness of the insulating coating is 8 μm. The thickness of the first adhesive layer and the third adhesive layer is 1 micrometer, and the thickness of the second adhesive layer is 2 micrometers.
Comparative example 1
This example provides an oxygen barrier seal coating, comparable to that of example 3 in that: the oxygen-resistant sealing coating provided by the embodiment is formed by compounding an antioxidant coating, a second adhesive layer, an insulating coating and a third adhesive layer from outside to inside in sequence, and the total thickness of the oxygen-resistant sealing coating is 44 mu. The thickness of the oxidation-resistant coating was 33 μm and the thickness of the insulating coating was 8 μm. The thickness of the third adhesive layer was 1 μm and the thickness of the second adhesive layer was 2 μm.
Comparative example 2
This example provides an oxygen barrier seal coating prepared from an existing polyurethane type oxygen barrier seal coating applied to a PCB board, which has the same thickness as that of the oxygen barrier seal coating of example 3.
Comparative experiment
The oxygen barrier seal coatings provided in example 3, comparative example 1 and comparative example 2 (each oxygen barrier seal coating is disposed on a glass plate of the same size) were put into a tube furnace for aging treatment, and the temperature parameters of the tube furnace were controlled as follows: the low temperature is 200-300 ℃, the high temperature is 400-500 ℃, the temperature rising and falling speed is 2-5 ℃/min, the high temperature and the low temperature are respectively kept for 1h as a cycle, and all the oxygen-resistant sealing coatings are circulated for 30 times. And after circulation is finished, taking out each oxygen-resistant sealing coating, cutting each oxygen-resistant sealing coating into a sample with the size of about 10mm multiplied by 10mm by using a linear cutting method or other cutting methods, cleaning the sample in an ultrasonic cleaning machine for 10-15 min by using acetone, cleaning the surface and the edge by using alcohol, and drying by using a blower. And finally, observing the section condition of each sample by using a scanning electron microscope. As a result, the oxygen barrier seal coating provided in example 3 did not fail and peeling-off between the corrosion-resistant coating, the oxidation-resistant coating and the insulating coating did not occur, the oxygen barrier seal coating provided in comparative example 2 failed, and the oxidation-resistant coating and the insulating coating of the oxygen barrier seal coating provided in comparative example 1 peeled off and failed. Experimental results show that the oxygen-barrier sealing coating provided by the embodiment 3 has the best service life, and the corrosion-resistant coating, the oxidation-resistant coating and the insulating coating can play a synergistic role, so that the connection strength among the corrosion-resistant coating, the oxidation-resistant coating and the insulating coating is enhanced.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. An oxygen barrier seal coating characterized by: the oxygen barrier sealing coating is formed by compounding an anti-corrosion coating, a first adhesive layer, an antioxidant coating, a second adhesive layer, an insulating coating and a third adhesive layer from outside to inside in sequence, the thickness of the anti-corrosion coating is a, the thickness of the antioxidant coating is b, the thickness of the insulating coating is c, and the requirements are met: b is more than a and more than c, and 3a is more than or equal to b and more than or equal to a and c.
2. An oxygen barrier seal coating according to claim 1 wherein: the anti-corrosion coating is prepared from an anti-corrosion coating, and the anti-corrosion coating comprises the following raw materials in parts by weight: 60-70 parts of micron-sized silicon oxide particles, 5-8 parts of silicon nitride ceramic particles, 60-70 parts of silane coupling agent, 30-40 parts of epoxy resin, 5-10 parts of diluent, 3-6 parts of silicon carbide particles and 25-30 parts of curing agent.
3. An oxygen barrier seal coating according to claim 2 wherein: the average grain diameter of the silicon oxide grains and the average grain diameter of the silicon nitride ceramic grains are both less than or equal to 10 um.
4. An oxygen barrier seal coating according to claim 2 wherein: the antioxidant coating is prepared from an antioxidant coating, and the preparation method of the antioxidant coating comprises the following steps: step 1, uniformly mixing 10-15 parts of zirconium oxide particles, 60-70 parts of aluminum particles, 10-15 parts of aluminum oxide particles, 1.0-1.2 parts of molybdenum disilicide micro-particles and 1.5-2.0 parts of silicon oxide particles to obtain a mixture A; step 2, performing ultrasonic mixing on 60-65 parts of the mixture A, 25-30 parts of a wetting agent and 1.0-1.5 parts of a dispersing agent to obtain slurry B; and 3, mixing 50-55 parts of the slurry B, 4-5 parts of polytetrafluoroethylene, 2-3 parts of the silane coupling agent, 1.5-2.5 parts of an auxiliary agent and 45-50 parts of deionized water, stirring at the rotating speed of 60-100 r/min for 60-90 min at room temperature, and standing at the constant temperature in a 38-42 ℃ water bath environment for 30-60 min.
5. An oxygen barrier seal coating according to claim 4 wherein: the wetting agent is a water-soluble wetting agent, and the dispersing agent is polyoxyethylene octyl phenol ether-10.
6. An oxygen barrier seal coating according to claim 4 wherein: the auxiliary agent comprises water-soluble silicate and glycol, the water-soluble silicate is at least one of sodium silicate and potassium silicate, and the mass ratio of the water-soluble silicate to the glycol is 1-2: 1.
7. An oxygen barrier seal coating according to claim 4 wherein: the silane coupling agent is at least one of gamma-methacryloxypropyltrimethoxysilane, gamma-2, 3-glycidoxy-propyltrimethoxysilane and gamma-aminopropyltriethoxysilane.
8. An oxygen barrier seal coating according to claim 7 wherein: the insulating coating is prepared from insulating paint which is fluorine-containing polymer.
9. An oxygen barrier seal coating according to claim 8, wherein: the first adhesive layer, the second adhesive layer and the third adhesive layer are all prepared from the same adhesive coating, the adhesive coating is a two-component polyurethane adhesive, and the thicknesses of the first adhesive layer, the second adhesive layer and the third adhesive layer are not less than 0.5 mu m.
10. An oxygen barrier seal coating according to any one of claims 1 to 9 wherein: the total thickness of the oxygen-resistant sealing coating is 10-80 mu m.
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|---|---|---|---|
| CN202110286090.5A CN113174179A (en) | 2021-03-17 | 2021-03-17 | Oxygen-barrier sealing coating |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110286090.5A CN113174179A (en) | 2021-03-17 | 2021-03-17 | Oxygen-barrier sealing coating |
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| CN113174179A true CN113174179A (en) | 2021-07-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114574094A (en) * | 2022-03-03 | 2022-06-03 | 上海派拉纶生物技术股份有限公司 | High-reliability integrated circuit protective coating |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005254557A (en) * | 2004-03-10 | 2005-09-22 | Chugoku Marine Paints Ltd | Heavy duty corrosion-proof laminated coat, steel member with heavy duty corrosion-proof laminated coat, and method for forming heavy duty corrosion-proof laminated coat |
| CN103333587A (en) * | 2013-07-01 | 2013-10-02 | 江苏达胜热缩材料有限公司 | Composite insulation paint |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114574094A (en) * | 2022-03-03 | 2022-06-03 | 上海派拉纶生物技术股份有限公司 | High-reliability integrated circuit protective coating |
| CN114574094B (en) * | 2022-03-03 | 2023-03-03 | 上海派拉纶生物技术股份有限公司 | High-reliability integrated circuit protective coating |
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