CN114456710A - High-temperature-resistant coating with excellent performance as well as preparation method and use method thereof - Google Patents

High-temperature-resistant coating with excellent performance as well as preparation method and use method thereof Download PDF

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Publication number
CN114456710A
CN114456710A CN202210252074.9A CN202210252074A CN114456710A CN 114456710 A CN114456710 A CN 114456710A CN 202210252074 A CN202210252074 A CN 202210252074A CN 114456710 A CN114456710 A CN 114456710A
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parts
coating
agent
temperature
composite additive
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马福文
丁一
陶蕾
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Nantong Josson New Material Technology Co ltd
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Nantong Josson New Material 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
    • B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
    • B05D3/0254—After-treatment
    • 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
    • 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
    • B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
    • 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
    • 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
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/18—Fireproof paints including high temperature resistant 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
    • 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
    • C09D7/65—Additives macromolecular
    • 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
    • C09D7/80—Processes for incorporating ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation

Abstract

The invention discloses a high-temperature-resistant coating with excellent performance, a preparation method and a use method thereof, wherein the coating is prepared from the following raw materials in parts by weight: 35-60 parts of water-based organic silicon resin, 5-30 parts of water-based polyurethane resin, 3.5-10 parts of silane coupling agent, 1.5-16 parts of composite additive, 11-27 parts of composite additive and 15-20 parts of deionized water; the composite additive is composed of a leveling agent, a defoaming agent, a dispersing agent and a wetting agent, and the composite additive is composed of glass powder, graphene dispersion liquid, high-temperature pigment and polysilazane. The coating prepared by the invention has excellent overall performance and can be widely applied to places such as copper and steel substrates of fireplaces, chimney pipelines, electronic components and the like.

Description

High-temperature-resistant coating with excellent performance as well as preparation method and use method thereof
The technical field is as follows:
the invention relates to the technical field of high-temperature-resistant coatings, in particular to a high-temperature-resistant coating with excellent performance, and a preparation method and a use method thereof.
Background art:
the high-temperature resistant coating is a functional coating which can still maintain certain physical and chemical properties under long-term high-temperature conditions so as to ensure that a protected object can normally operate. The high-temperature-resistant coating is widely applied to places such as copper and steel substrates of true fire fireplaces, chimney pipelines and electronic components, the requirement on high-temperature-resistant coatings is continuously improved along with the rapid development of the industry, and the high-temperature-resistant coating needs to have high temperature resistance, corrosion resistance, impact resistance and the like, so that the high-temperature-resistant coating with excellent performance is provided, and the high-temperature-resistant coating can be widely applied.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
The invention content is as follows:
the invention aims to provide a high-temperature-resistant coating with excellent performance, a preparation method and a use method thereof, thereby overcoming the defects in the prior art.
In order to achieve the purpose, the invention provides a high-temperature-resistant coating with excellent performance, which is composed of the following raw materials in parts by weight: 35-60 parts of water-based organic silicon resin, 5-30 parts of water-based polyurethane resin, 3.5-10 parts of silane coupling agent, 1.5-16 parts of composite auxiliary agent, 11-27 parts of composite additive and 15-20 parts of deionized water; the composite additive is composed of a leveling agent, a defoaming agent, a dispersing agent and a wetting agent, and the composite additive is composed of glass powder, graphene dispersion liquid, high-temperature pigment and polysilazane.
The composite auxiliary agent consists of 0.5-5 parts of flatting agent, 0.3-4.5 parts of defoaming agent, 0.5-5 parts of dispersing agent and 0.2-1.5 parts of wetting agent; the composite additive comprises 5-10 parts of glass powder, 5-10 parts of graphene dispersion liquid, 0.5-5 parts of high-temperature pigment and 0.5-2 parts of polysilazane.
The material is composed of the following raw materials in parts by weight: 45 parts of water-based organic silicon resin, 12 parts of water-based polyurethane resin, 8 parts of silane coupling agent, 8 parts of composite auxiliary agent, 12 parts of composite additive and 15 parts of deionized water; the composite additive is composed of 2.5 parts of a leveling agent, 2 parts of a defoaming agent, 2.5 parts of a dispersing agent and 1 part of a wetting agent, and the composite additive is composed of 5 parts of glass powder, 5 parts of graphene dispersion liquid, 1 part of high-temperature pigment and 1 part of polysilazane.
The leveling agent is a hyperbranched organic silicon leveling agent.
A preparation method of a high-temperature-resistant coating with excellent performance comprises the following steps:
(1) preparing raw materials of each component according to a proportion, adding the water-based organic silicon resin into deionized water, uniformly stirring, then respectively adding the water-based polyurethane resin and the silane coupling agent, continuously and uniformly stirring at a stirring speed of 350-;
(2) preparing the composite additive according to the proportion, and uniformly mixing the composite additive at a stirring speed of 450-650r/min for 35-45 min;
(3) preparing the composite auxiliary agent according to the proportion, and uniformly mixing the composite auxiliary agent at the stirring speed of 300-400r/min for 25-35 min;
(4) and (3) respectively adding the mixed composite additive and the composite auxiliary agent into the mixed material obtained in the step (1), and continuously stirring uniformly at the stirring speed of 350-500r/min for 35-65 min.
The operating environment of the steps (1) to (4) is controlled at 25 +/-5 ℃ and the humidity of 65 +/-5%.
A using method of a high-temperature-resistant coating with excellent performance comprises the following steps:
(1) pretreating a base material: removing impurities such as grease and burrs on the surface of the base material;
(2) coating: pre-drying the substrate coated with the coating at 75-105 deg.C for 25-30min, coating a layer of coating on the substrate, and pre-drying again for 3-5 times;
(3) deep baking: and (3) deep baking the base material treated in the step (2) at the temperature of 150-200 ℃ for 45-65min to form a compact protective layer.
The total thickness of the coating application is 300-500 μm.
The coating is applied by brushing or spraying.
Compared with the prior art, the invention has the following beneficial effects:
the invention integrally adopts a water-based system, is environment-friendly and pollution-free, optimizes the formula of the high-temperature-resistant coating, and can improve the high-temperature resistance, corrosion resistance, wear resistance and the like of the coating by adding a small amount of glass powder, graphene dispersion liquid and polysilazane into the formula; during preparation, the composite auxiliary agent and the composite additive are respectively and uniformly mixed and then added into the resin system for mixing, so that the complicated charging procedure can be shortened, and the materials can be more conveniently and uniformly mixed in a shorter time; when the paint is used, various performances of the coating can be further improved by adopting a multi-layer coating and multi-channel drying procedure.
The specific implementation mode is as follows:
the following detailed description of specific embodiments of the invention is provided, but it should be understood that the scope of the invention is not limited to the specific embodiments.
Example 1:
a high-temperature-resistant coating with excellent performance is composed of the following raw materials in parts by weight: 45 parts of water-based organic silicon resin, 12 parts of water-based polyurethane resin, 8 parts of silane coupling agent, 8 parts of composite auxiliary agent, 12 parts of composite additive and 15 parts of deionized water; the composite additive comprises 2.5 parts of a leveling agent, 2 parts of a defoaming agent, 2.5 parts of a dispersing agent and 1 part of a wetting agent, and the composite additive comprises 5 parts of glass powder, 5 parts of graphene dispersion liquid, 1 part of high-temperature pigment and 1 part of polysilazane; the leveling agent is a hyperbranched organic silicon leveling agent.
The preparation method of the coating comprises the following steps:
(1) preparing raw materials of each component according to a proportion, adding the water-based organic silicon resin into deionized water, uniformly stirring, then respectively adding the water-based polyurethane resin and the silane coupling agent, continuously and uniformly stirring, wherein the stirring speed is 350r/min, and stirring for 50min in total;
(2) preparing the composite additive according to the proportion, and uniformly mixing the composite additive at a stirring speed of 500r/min for 40 min;
(3) preparing the composite auxiliary agent according to the proportion, and uniformly mixing the composite auxiliary agent at a stirring speed of 350r/min for 30 min;
(4) and (3) respectively adding the mixed composite additive and the composite auxiliary agent into the mixed material obtained in the step (1), and continuously stirring uniformly at the stirring speed of 450r/min for 45 min.
The operating environment of the steps (1) to (4) is controlled at 25 +/-5 ℃ and the humidity of 65 +/-5%.
The application method of the coating comprises the following steps:
(1) pretreating a base material: removing impurities such as grease and burrs on the surface of the base material;
(2) coating: pre-drying the substrate coated with the coating at 80 ℃ for 25min, coating a layer of coating on the substrate, and then continuing the pre-drying, and repeating the steps for 5 times;
(3) deep baking: and (3) deep baking the base material treated in the step (2) at the temperature of 150 ℃ for 45-65min to form a compact protective layer.
The total thickness of the coating application was 350 μm.
The coating is applied by a brush coating process.
Example 2:
a high-temperature-resistant coating with excellent performance is composed of the following raw materials in parts by weight: 35 parts of water-based organic silicon resin, 23 parts of water-based polyurethane resin, 5 parts of silane coupling agent, 3.5 parts of composite additive, 15.5 parts of composite additive and 18 parts of deionized water; the composite additive comprises 1 part of leveling agent, 0.5 part of defoaming agent, 1 part of dispersing agent and 1 part of wetting agent, and the composite additive comprises 6 parts of glass powder, 6 parts of graphene dispersion liquid, 2 parts of high-temperature pigment and 1.5 parts of polysilazane; the leveling agent is a hyperbranched organic silicon leveling agent.
The preparation method of the coating comprises the following steps:
(1) preparing raw materials of each component according to a proportion, adding the water-based organic silicon resin into deionized water, uniformly stirring, then respectively adding the water-based polyurethane resin and the silane coupling agent, continuously and uniformly stirring, wherein the stirring speed is 350r/min, and stirring for 45min in total;
(2) preparing the composite additive according to the proportion, and uniformly mixing the composite additive at a stirring speed of 450r/min for 35 min;
(3) preparing the composite auxiliary agent according to the proportion, and uniformly mixing the composite auxiliary agent at a stirring speed of 350r/min for 28 min;
(4) and (3) respectively adding the mixed composite additive and the composite auxiliary agent into the mixed material obtained in the step (1), and continuously stirring uniformly at the stirring speed of 350r/min for 40 min.
The operating environment of the steps (1) to (4) is controlled at 25 +/-5 ℃ and the humidity of 65 +/-5%.
The application method of the coating comprises the following steps:
(1) pretreating a base material: removing impurities such as grease and burrs on the surface of the base material;
(2) coating: pre-drying the substrate coated with the coating at 85 ℃ for 25min, coating a layer of coating on the substrate, and then continuing the pre-drying, and repeating the steps for 5 times;
(3) deep baking: and (3) deep baking the base material treated in the step (2) at the temperature of 155 ℃ for 45min to form a compact protective layer.
The total thickness of the coating application was 380 μm.
The coating is applied by a brush coating process.
Example 3:
a high-temperature-resistant coating with excellent performance is composed of the following raw materials in parts by weight: 50 parts of water-based organic silicon resin, 5 parts of water-based polyurethane resin, 5.5 parts of silane coupling agent, 6 parts of composite auxiliary agent, 18.5 parts of composite additive and 15 parts of deionized water; the composite additive comprises 1.5 parts of a leveling agent, 2 parts of a defoaming agent, 1.5 parts of a dispersing agent and 1 part of a wetting agent, and the composite additive comprises 7 parts of glass powder, 7 parts of graphene dispersion liquid, 3 parts of high-temperature pigment and 1.5 parts of polysilazane; the leveling agent is a hyperbranched organic silicon leveling agent.
The preparation method of the coating comprises the following steps:
(1) preparing raw materials of each component according to a proportion, adding the water-based organic silicon resin into deionized water, uniformly stirring, then respectively adding the water-based polyurethane resin and the silane coupling agent, continuously and uniformly stirring, wherein the stirring speed is 400r/min, and stirring for 45min in total;
(2) preparing the composite additive according to the proportion, and uniformly mixing the composite additive at a stirring speed of 450r/min for 35 min;
(3) preparing the composite auxiliary agent according to the proportion, and uniformly mixing the composite auxiliary agent at a stirring speed of 350r/min for 28 min;
(4) and (3) respectively adding the mixed composite additive and the composite auxiliary agent into the mixed material obtained in the step (1), and continuously stirring uniformly at the stirring speed of 350r/min for 40 min.
The operating environment of the steps (1) to (4) is controlled at 25 +/-5 ℃ and the humidity of 65 +/-5%.
The application method of the coating comprises the following steps:
(1) pretreating a base material: removing impurities such as grease and burrs on the surface of the base material;
(2) coating: pre-drying the substrate coated with the coating at 95 ℃ for 25min, coating a layer of coating on the substrate, and then continuing the pre-drying, and repeating the steps for 5 times;
(3) deep baking: and (3) deep baking the base material treated in the step (2) at the temperature of 160 ℃ for 45min to form a compact protective layer.
The total thickness of the coating application was 360 μm.
The coating is applied by a brush coating process.
Example 4:
a high-temperature-resistant coating with excellent performance is composed of the following raw materials in parts by weight: 40 parts of water-based organic silicon resin, 17 parts of water-based polyurethane resin, 8 parts of silane coupling agent, 8 parts of composite auxiliary agent, 12 parts of composite additive and 15 parts of deionized water; the composite additive comprises 2.5 parts of a leveling agent, 2 parts of a defoaming agent, 2.5 parts of a dispersing agent and 1 part of a wetting agent, and the composite additive comprises 5 parts of glass powder, 5 parts of graphene dispersion liquid, 1 part of high-temperature pigment and 1 part of polysilazane; the leveling agent is a hyperbranched organic silicon leveling agent.
The preparation method of the coating comprises the following steps:
(1) preparing raw materials of each component according to a proportion, adding the water-based organic silicon resin into deionized water, uniformly stirring, then respectively adding the water-based polyurethane resin and the silane coupling agent, continuously and uniformly stirring, wherein the stirring speed is 400r/min, and stirring for 45min in total;
(2) preparing the composite additive according to the proportion, and uniformly mixing the composite additive at a stirring speed of 500r/min for 35 min;
(3) preparing the composite auxiliary agent according to the proportion, and uniformly mixing the composite auxiliary agent at a stirring speed of 350r/min for 30 min;
(4) and (2) respectively adding the mixed composite additive and the composite auxiliary agent into the mixed material obtained in the step (1), and continuously stirring uniformly at the stirring speed of 380r/min for 45 min.
The operating environment of the steps (1) to (4) is controlled at 25 +/-5 ℃ and the humidity of 65 +/-5%.
The application method of the coating comprises the following steps:
(1) pretreating a base material: removing impurities such as grease and burrs on the surface of the base material;
(2) coating: pre-drying the substrate coated with the coating at 90 ℃ for 28min, coating a layer of coating on the substrate, and then continuing to pre-dry, and repeating the steps for 5 times;
(3) deep baking: and (3) deep baking the base material treated in the step (2) at the temperature of 150 ℃ for 50min to form a compact protective layer.
The total thickness of the coating application was 365 μm.
The coating is applied by a brush coating process.
Comparative example 1:
a high-temperature-resistant coating with excellent performance is composed of the following raw materials in parts by weight: 45 parts of water-based organic silicon resin, 12 parts of water-based polyurethane resin, 8 parts of silane coupling agent, 8 parts of composite auxiliary agent, 12 parts of composite additive and 15 parts of deionized water; the composite additive is composed of 2.5 parts of a leveling agent, 2 parts of a defoaming agent, 2.5 parts of a dispersing agent and 1 part of a wetting agent, and the composite additive is composed of 8 parts of graphene dispersion liquid, 1 part of high-temperature pigment and 3 parts of polysilazane; the leveling agent is a hyperbranched organic silicon leveling agent.
The preparation method of the coating comprises the following steps:
(1) preparing raw materials of each component according to a proportion, adding the water-based organic silicon resin into deionized water, uniformly stirring, then respectively adding the water-based polyurethane resin and the silane coupling agent, continuously and uniformly stirring, wherein the stirring speed is 400r/min, and stirring for 45min in total;
(2) preparing the composite additive according to the proportion, and uniformly mixing the composite additive at a stirring speed of 500r/min for 35 min;
(3) preparing the composite auxiliary agent according to the proportion, and uniformly mixing the composite auxiliary agent at a stirring speed of 350r/min for 30 min;
(4) and (2) respectively adding the mixed composite additive and the composite auxiliary agent into the mixed material obtained in the step (1), and continuously stirring uniformly at the stirring speed of 380r/min for 45 min.
The operating environment of the steps (1) to (4) is controlled at 25 +/-5 ℃ and the humidity of 65 +/-5%.
The application method of the coating comprises the following steps:
(1) pretreating a base material: removing impurities such as grease and burrs on the surface of the base material;
(2) coating: pre-drying the substrate coated with the coating at 90 ℃ for 28min, coating a layer of coating on the substrate, and then continuing to pre-dry, and repeating the steps for 5 times;
(3) deep baking: and (3) deep baking the base material treated in the step (2) at the temperature of 150 ℃ for 50min to form a compact protective layer.
The total thickness of the coating application was 365 μm.
The coating is applied by a brush coating process.
Comparative example 2:
a high-temperature-resistant coating with excellent performance is composed of the following raw materials in parts by weight: 45 parts of water-based organic silicon resin, 12 parts of water-based polyurethane resin, 8 parts of silane coupling agent, 8 parts of composite auxiliary agent, 12 parts of composite additive and 15 parts of deionized water; the composite additive comprises 2.5 parts of a leveling agent, 2 parts of a defoaming agent, 2.5 parts of a dispersing agent and 1 part of a wetting agent, and the composite additive comprises 8 parts of glass powder, 1 part of high-temperature pigment and 3 parts of polysilazane; the leveling agent is a hyperbranched organic silicon leveling agent.
The preparation method of the coating comprises the following steps:
(1) preparing raw materials of each component according to a proportion, adding the water-based organic silicon resin into deionized water, uniformly stirring, then respectively adding the water-based polyurethane resin and the silane coupling agent, continuously and uniformly stirring, wherein the stirring speed is 400r/min, and stirring for 45min in total;
(2) preparing the composite additive according to the proportion, and uniformly mixing the composite additive at a stirring speed of 500r/min for 35 min;
(3) preparing the composite auxiliary agent according to the proportion, and uniformly mixing the composite auxiliary agent at a stirring speed of 350r/min for 30 min;
(4) and (2) respectively adding the mixed composite additive and the composite auxiliary agent into the mixed material obtained in the step (1), and continuously stirring uniformly at the stirring speed of 380r/min for 45 min.
The operating environment of the steps (1) to (4) is controlled at 25 +/-5 ℃ and the humidity of 65 +/-5%.
The application method of the coating comprises the following steps:
(1) pretreating a base material: removing impurities such as grease and burrs on the surface of the base material;
(2) coating: pre-drying the substrate coated with the coating at 90 ℃ for 28min, coating a layer of coating on the substrate, and then continuing to pre-dry, and repeating the steps for 5 times;
(3) deep baking: and (3) deep baking the base material treated in the step (2) at the temperature of 150 ℃ for 50min to form a compact protective layer.
The total thickness of the coating application was 365 μm.
The coating is applied by a brush coating process.
Comparative example 3:
a high-temperature-resistant coating with excellent performance is composed of the following raw materials in parts by weight: 45 parts of water-based organic silicon resin, 12 parts of water-based polyurethane resin, 8 parts of silane coupling agent, 8 parts of composite auxiliary agent, 9 parts of composite additive and 18 parts of deionized water; the composite additive is composed of 2.5 parts of a leveling agent, 2 parts of a defoaming agent, 2.5 parts of a dispersing agent and 1 part of a wetting agent, and the composite additive is composed of 8 parts of graphene dispersion liquid and 1 part of high-temperature pigment; the leveling agent is a hyperbranched organic silicon leveling agent.
The preparation method of the coating comprises the following steps:
(1) preparing raw materials of each component according to a proportion, adding the water-based organic silicon resin into deionized water, uniformly stirring, then respectively adding the water-based polyurethane resin and the silane coupling agent, continuously and uniformly stirring, wherein the stirring speed is 350r/min, and stirring for 45min in total;
(2) preparing the composite additive according to the proportion, and uniformly mixing the composite additive at a stirring speed of 450r/min for 35 min;
(3) preparing the composite auxiliary agent according to the proportion, and uniformly mixing the composite auxiliary agent at a stirring speed of 350r/min for 35 min;
(4) and (3) respectively adding the mixed composite additive and the composite auxiliary agent into the mixed material obtained in the step (1), and continuously stirring uniformly at the stirring speed of 400r/min for 45 min.
The operating environment of the steps (1) to (4) is controlled at 25 +/-5 ℃ and the humidity of 65 +/-5%.
The application method of the coating comprises the following steps:
(1) pretreating a base material: removing impurities such as grease and burrs on the surface of the base material;
(2) coating: pre-drying the substrate coated with the coating at 105 ℃ for 25min, coating a layer of coating on the substrate, and then continuing the pre-drying, and repeating the steps for 5 times;
(3) deep baking: and (3) deep baking the base material treated in the step (2) at 185 ℃ for 45min to form a compact protective layer.
The total thickness of the coating application was 385 μm.
The coating is applied by a brush coating process.
Comparative example 4:
a high-temperature-resistant coating with excellent performance is composed of the following raw materials in parts by weight: 56 parts of water-based organic silicon resin, 12 parts of water-based polyurethane resin, 8 parts of silane coupling agent, 8 parts of composite auxiliary agent, 1 part of additive and 15 parts of deionized water; the composite auxiliary agent consists of 2.5 parts of a leveling agent, 2 parts of a defoaming agent, 2.5 parts of a dispersing agent and 1 part of a wetting agent, and the additive is 1 part of a high-temperature pigment; the leveling agent is a hyperbranched organic silicon leveling agent.
The preparation method of the coating comprises the following steps:
(1) preparing raw materials of each component according to a proportion, adding the water-based organic silicon resin into deionized water, uniformly stirring, then respectively adding the water-based polyurethane resin and the silane coupling agent, continuously uniformly stirring, wherein the stirring speed is 500r/min, and stirring for 45min in total;
(3) preparing the composite auxiliary agent according to the proportion, and uniformly mixing the composite auxiliary agent at a stirring speed of 350r/min for 35 min;
(4) and (2) respectively adding the additive and the mixed compound auxiliary agent into the mixed material obtained in the step (1), and continuously stirring uniformly at the stirring speed of 350r/min for 40 min.
The operating environment of the steps (1) to (4) is controlled at 25 +/-5 ℃ and the humidity of 65 +/-5%.
The application method of the coating comprises the following steps:
(1) pretreating a base material: removing impurities such as grease and burrs on the surface of the base material;
(2) coating: pre-drying the substrate coated with the coating at 85 ℃ for 28min, coating a layer of coating on the substrate, and then continuing to pre-dry, and repeating the steps for 5 times;
(3) deep baking: and (3) deep baking the base material treated in the step (2) at 165 ℃ for 50min to form a compact protective layer.
The total thickness of the coating application was 350 μm.
The coating is applied by a brush coating process.
The components of the above examples 1-4 and comparative examples 1-4 are shown in the following table:
Figure RE-GDA0003578072430000131
the coatings of examples 1-4 and comparative examples 1-4 above were tested for their various properties, and the results are shown in the following table:
test method Example 1 Example 2 Example 3 Example 4 Comparative example 1 Comparative example 2 Comparative example 3 Comparative example 4
Adhesion force Baige test 5B 5B 5B 5B 5B 5B 5B 5B
Cold and hot punching Impact performance Cold and hot impact test box Complete coating, no Bubbles and falling off Complete coating, no Bubbles and falling off Complete coating, no Bubbles and falling off The coating has slight color Crack(s) Complete coating, no Bubbles and falling off Complete coating, no Bubbles and falling off Complete coating, no Bubbles and falling off Complete coating, no Bubbles and falling off
Heat resistance 600℃/24h Complete coating, no Bubbles and falling off Complete coating, no Bubbles and falling off Complete coating, no Bubbles and falling off Complete coating, no Bubbles and falling off The coating has slight color Crack(s) Complete coating, no Bubbles and falling off The coating having cracks The coating having cracks
Acid resistance 10%H2SO4/72h Complete coating, no Bubbles and falling off Complete coating, no Bubbles and falling off Complete coating, no Bubbles and falling off Complete coating and no Bubbles and falling off Complete coating, no Bubbles and falling off The coating has slight color Crack(s) Complete coating, no Bubbles and falling off The coating has slight color Crack(s)
Alkali resistance 10%NaOH/72h Complete coating, no Bubbles and falling off Complete coating, no Bubbles and falling off Complete coating, no Bubbles and falling off Complete coating, no Bubbles and falling off Complete coating, no Bubbles and falling off The coating has slight color Crack(s) Complete coating, no Bubbles and falling off The coating has slight color Crack(s)
Wear resistance RCA200 for paper tape tester 1000 rings of gram force friction The coating is intact Scratch mark The coating is intact Scratch mark The coating is intact Scratch mark The coating is intact Scratch mark The coating has slight color Scratch mark The coating is intact Scratch mark The coating has slight color Scratch mark The coating has slight color Scratch mark
Remarking: 1. cold and hot impact properties: during the test, the coating is placed at room temperature after being dried for 4 hours under the condition of 65 ℃ after being cycled back and forth for 50 times at 40 ℃/20min and 65 ℃/20min in a cold-hot impact test box, and the change of the surface of the coating is recovered and observed.
2. In the experiment, the coating base material is tinplate.
From the experimental results, the high-temperature resistant coating disclosed by the invention has excellent adhesive force, cold and hot impact performance, corrosion resistance and the like. The preparation method specifically comprises the steps of adding a proper amount of glass powder, graphene dispersion liquid and polysilazane into raw materials, and optimizing a formula, wherein the glass powder can replace organic silicon resin to form a film at a high temperature, so that the effect of secondary film formation is achieved, the coating is isolated from being oxidized, the thermal strength of the coating is maintained, and a substrate is protected from being corroded; the polysilazane is easy to combine with a metal substrate due to the characteristic of Si-N polarity in the structure, and can improve the bonding tightness between the coating and the substrate on the premise of high temperature resistance; and the graphene has excellent high-temperature resistance, corrosion resistance and the like. Therefore, the coating has excellent overall performance and can be widely applied to places such as copper and steel substrates of fireplaces, chimney pipelines, electronic components and the like.
The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (9)

1. A high-temperature resistant coating with excellent performance is characterized in that: the material is composed of the following raw materials in parts by weight: 35-60 parts of water-based organic silicon resin, 5-30 parts of water-based polyurethane resin, 3.5-10 parts of silane coupling agent, 1.5-16 parts of composite auxiliary agent, 11-27 parts of composite additive and 15-20 parts of deionized water; the composite additive is composed of a leveling agent, a defoaming agent, a dispersing agent and a wetting agent, and the composite additive is composed of glass powder, graphene dispersion liquid, high-temperature pigment and polysilazane.
2. The high-temperature-resistant coating with excellent performance as claimed in claim 1, wherein: the composite additive is composed of 0.5-5 parts of flatting agent, 0.3-4.5 parts of defoaming agent, 0.5-5 parts of dispersing agent and 0.2-1.5 parts of wetting agent; the composite additive comprises 5-10 parts of glass powder, 5-10 parts of graphene dispersion liquid, 0.5-5 parts of high-temperature pigment and 0.5-2 parts of polysilazane.
3. The high-temperature-resistant coating with excellent performance as claimed in claim 2, wherein: the material is composed of the following raw materials in parts by weight: 45 parts of water-based organic silicon resin, 12 parts of water-based polyurethane resin, 8 parts of silane coupling agent, 8 parts of composite auxiliary agent, 12 parts of composite additive and 15 parts of deionized water; the composite additive is composed of 2.5 parts of a leveling agent, 2 parts of a defoaming agent, 2.5 parts of a dispersing agent and 1 part of a wetting agent, and the composite additive is composed of 5 parts of glass powder, 5 parts of graphene dispersion liquid, 1 part of high-temperature pigment and 1 part of polysilazane.
4. The high-temperature-resistant coating with excellent performance as claimed in claim 1, wherein: the leveling agent is a hyperbranched organic silicon leveling agent.
5. A preparation method of high-temperature resistant paint with excellent performance is characterized by comprising the following steps: the method comprises the following steps:
(1) preparing raw materials of each component according to a proportion, adding the water-based organic silicon resin into deionized water, uniformly stirring, then respectively adding the water-based polyurethane resin and the silane coupling agent, continuously and uniformly stirring at a stirring speed of 350-;
(2) preparing the composite additive according to the proportion, and uniformly mixing the composite additive at a stirring speed of 450-650r/min for 35-45 min;
(3) preparing the composite auxiliary agent according to the proportion, and uniformly mixing the composite auxiliary agent at the stirring speed of 300-400r/min for 25-35 min;
(4) and (2) respectively adding the mixed composite additive and composite auxiliary agent into the mixed material obtained in the step (1), and continuously stirring uniformly at the stirring speed of 350-500r/min for 35-65 min.
6. The preparation method of the high-temperature-resistant coating with excellent performance as claimed in claim 5, wherein the preparation method comprises the following steps: the operating environment of the steps (1) to (4) is controlled at 25 +/-5 ℃ and the humidity of 65 +/-5%.
7. The use method of the high-temperature-resistant coating with excellent performance is characterized by comprising the following steps: the method comprises the following steps:
(1) pretreating a base material: removing impurities such as grease and burrs on the surface of the base material;
(2) coating: pre-drying the substrate coated with the coating at 75-105 deg.C for 25-30min, coating a layer of coating on the substrate, and pre-drying again for 3-5 times;
(3) deep baking: and (3) deep baking the base material treated in the step (2) at the temperature of 150-200 ℃ for 45-65min to form a compact protective layer.
8. The use method of the high-temperature-resistant coating with excellent performance as claimed in claim 7, is characterized in that: the total thickness of the coating application is 300-500 μm.
9. The use method of the high-temperature-resistant coating with excellent performance as claimed in claim 7, is characterized in that: the coating is applied by brushing or spraying.
CN202210252074.9A 2022-03-15 2022-03-15 High-temperature-resistant coating with excellent performance as well as preparation method and use method thereof Pending CN114456710A (en)

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CN107987720A (en) * 2017-11-02 2018-05-04 广东华材实业股份有限公司 A kind of high temperature resistant anti-corrosive organic coatings and preparation method thereof
CN109370427A (en) * 2018-10-08 2019-02-22 广东美的厨房电器制造有限公司 Coating composition and preparation method thereof, coating piece and preparation method thereof, household electrical appliance
CN110732474A (en) * 2019-11-21 2020-01-31 广东美的制冷设备有限公司 Surface processing method of heat exchanger side plate, heat exchanger and household appliance
CN111218134A (en) * 2020-03-02 2020-06-02 上海碳源汇谷新材料科技有限公司 High-temperature-resistant and corrosion-resistant graphene coating and preparation method thereof
CN111909573A (en) * 2020-08-21 2020-11-10 山东滨州嘉源环保有限责任公司 Graphene modified high chlorinated polyethylene resin anticorrosive paint and preparation method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103965775A (en) * 2014-05-20 2014-08-06 重庆海联水性涂料有限公司 Water-based organosilicone high temperature resistant anticorrosive coating and preparation method thereof
CN107987720A (en) * 2017-11-02 2018-05-04 广东华材实业股份有限公司 A kind of high temperature resistant anti-corrosive organic coatings and preparation method thereof
CN109370427A (en) * 2018-10-08 2019-02-22 广东美的厨房电器制造有限公司 Coating composition and preparation method thereof, coating piece and preparation method thereof, household electrical appliance
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