Refractory material protective coating

Abstract

The utility model provides a fireproof material protective coating, which relates to the technical field of fireproof coatings and comprises a protective coating formed by sequentially coating a primer, a bottom layer, a main body layer, a surface layer and a finishing coat, the primer is an inorganic silicate primer, and nano aluminum oxide particles are added; the bottom layer is of a multi-layer composite structure; the main body layer is made of inorganic fibers; the bottom layer is of a multi-layer composite structure and comprises a high-alumina refractory material and expanded graphite, the high-alumina refractory material has excellent high-temperature resistance, the expanded graphite can rapidly expand at high temperature to form a heat insulation barrier, and the bottom layer can form a more stable and compact protection layer in a high-temperature environment through combination of the high-alumina refractory material and the expanded graphite; the chopped inorganic fibers further enhance the structural strength of the bottom layer and improve the crack resistance of the bottom layer; the inorganic silicate primer is adopted, and the nano aluminum oxide particles are added, so that the high-temperature resistance and the oxidation resistance of the coating are improved, and meanwhile, the hardness and the stability of the coating are enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to fireproof coating technical field especially relates to a refractory protection coating. BACKGROUND

[0002] In the industrial production, building safety and fire fighting etc. field, the application of refractory protection coating is very important, it can effectively resist the invasion of high temperature environment, prevent the oxidation, corrosion or structure damage of material due to high temperature, however, the traditional refractory protection coating often has the problems such as fixed layer number, single function, limited protection effect etc., although there is the coating configured according to specific demand on the market, but its overall performance still needs to be improved, especially in the stability and durability under high temperature environment, therefore, we propose a refractory protection coating. SUMMARY

[0003] The utility model discloses a refractory protection coating, which can effectively improve the stability and durability of the coating under high temperature environment, and the overall performance of the coating is improved.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A refractory protection coating, comprising a primer, a bottom layer, a main body layer, a surface layer and a topcoat, which are sequentially coated to form a protective coating.

[0006] The primer is an inorganic silicate primer, and nano-aluminum oxide particles are added.

[0007] The bottom layer is a multi-layer composite structure.

[0008] The main body layer is an inorganic fiber.

[0009] Further, a silane coupling agent layer is coated between the primer and the protective surface.

[0010] Further, the multi-layer composite structure of the bottom layer comprises a high-alumina refractory material layer and an expanded graphite layer, which are sequentially coated.

[0011] Further, the high-alumina

[0012] refractory material layer and the expanded graphite layer are added with short-cut inorganic fibers.

[0013] Further, the inorganic fibers can be ceramic fibers or glass fibers.

[0014] Further, the surface layer is selected from inorganic-organic hybrid coatings.

[0015] Furthermore, the topcoat is selected from silicate-acrylic resin coatings.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. The bottom layer has a multi-layer composite structure, including a high-alumina refractory material layer and an expanded graphite layer. The high-alumina refractory material layer has excellent high-temperature resistance, while the expanded graphite layer can expand rapidly at high temperatures to form a heat insulation barrier. The combination of the two enables the bottom layer to form a more stable and dense protective layer in high-temperature environments. Short-cut inorganic fibers further enhance the structural strength of the bottom layer and improve its crack resistance.

[0018] 2. An inorganic silicate primer is used, and nano-alumina particles are added to improve the high temperature resistance and oxidation resistance of the coating, while also enhancing the hardness and stability of the coating.

[0019] 3. By introducing a silane coupling agent layer, the adhesion between the coating and the substrate and the chemical bonding strength between the layers are improved, making the coating adhere more firmly to the substrate surface. Attached Figure Description

[0020] Figure 1 A schematic diagram of the overall structural assembly of a refractory material protective coating provided by this utility model;

[0021] Figure 2 A schematic diagram showing the overall structure of a refractory material protective coating provided by this utility model;

[0022] Figure 3 An enlarged schematic diagram of structure A of a refractory material protective coating provided by this utility model;

[0023] Figure 4 This is a schematic diagram of the underlayer coating structure of a refractory material protective coating provided by this utility model.

[0024] Legend: 1. Primer; 11. Nano-alumina particles; 12. Silane coupling agent layer;

[0025] 2. Bottom layer; 21. High-alumina refractory material layer; 22. Expanded graphite layer;

[0026] 3. Main body layer;

[0027] 4. Surface layer;

[0028] 5. Topcoat. Detailed Implementation

[0029] The technical scheme in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0030] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related description of the present application, and several embodiments of the present application are given. However, the present application can be realized in many different forms, and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0031] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0033] Embodiment 1

[0034] As shown in Figures 1-4 The present application provides a technical scheme: a refractory protective coating, comprising, comprising primer 1, primer 2, main layer 3, surface layer 4 and surface coating 5 are coated in turn to form a protective coating;

[0035] The primer 1 is an inorganic silicate primer 1, such as potassium silicate or sodium silicate solution, which can form a chemical bond with various substrates (such as concrete, steel, etc.), improve the adhesion, and add nano alumina particles 11. The surface-treated nano alumina particles added in the primer 1 can not only improve the weather resistance and fire resistance of the primer, but also enhance the bonding force between the coating and the substrate through the nano effect;

[0036] The primer 2 is a multi-layer composite structure, and the multi-layer composite structure of the primer 2 comprises a high-alumina refractory material layer 21 and an expanded graphite layer 22.

[0037] It should be noted that the high alumina refractory material layer 21 is first coated on the primer 1, and then an expanded graphite layer 22 is coated on the high alumina refractory material layer 21 to form a more excellent fireproof and heat insulation effect;

[0038] The main layer 3 is inorganic fiber, and the inorganic fiber can be ceramic fiber or glass fiber. The inorganic fiber has good high-temperature resistance and heat insulation performance, can effectively reduce the temperature gradient inside the coating, improve the overall fireproof performance, and has certain flexibility, which helps to improve the crack resistance and wear resistance of the coating.

[0039] The surface layer 4 is selected from the inorganic-organic hybrid coating in the prior art, that is, a composite material formed by chemical bonding of inorganic ceramic coating and organic polymer resin (such as silicone resin, fluorocarbon resin, etc.). This hybrid coating can combine the fireproof performance of inorganic materials and the weather resistance and flexibility of organic materials.

[0040] The surface paint 5 is selected from the silicate-acrylic resin coating in the prior art, and can also be selected from the silicate-acrylic resin coating. It mainly plays the roles of beautifying, protecting and enhancing the fireproof performance, and can simultaneously exert the fireproof performance of inorganic materials and the weather resistance and flexibility of organic materials.

[0041] The primer 1 and the protective surface are further coated with a silane coupling agent layer 12. The silane coupling agent, as a special interface treatment agent, can significantly improve the adhesion between the coating and the substrate, and enhance the chemical bonding strength between the layers, which helps to ensure that the coating is not easy to fall off in a high-temperature environment and maintains its integrity.

[0042] Furthermore, short-cut inorganic fibers are added between the high alumina refractory material layer 21 and the expanded graphite layer 22. These fibers can enhance the structural strength of the bottom layer, and the inorganic fibers can be ceramic fiber or glass fiber.

[0043] In summary, the present refractory protective coating scheme effectively solves the problems in the prior art by optimizing the coating structure, enhancing the bonding force, improving the high-temperature and heat insulation performance, and optimizing the material combination, and improves the comprehensive performance and application range of the coating.

[0044] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A refractory protective coating, characterized by: The protective coating is formed by coating a primer (1), a base layer (2), a main layer (3), a surface layer (4) and a top coat (5) in sequence; The primer (1) is an inorganic silicate primer, and nano alumina particles (11) are added; The base layer (2) is a multi-layer composite structure; The main layer (3) is an inorganic fiber.

2. A refractory protective coating according to claim 1, characterised in that: A silane coupling agent layer (12) is further coated between the primer (1) and the protective surface.

3. A refractory protective coating according to claim 1, characterised in that: The multi-layer composite structure of the base layer (2) comprises a high-alumina refractory layer (21) and an expanded graphite layer (22) coated in sequence.

4. A refractory protective coating according to claim 3, characterised in that: Short-cut inorganic fibers are added between the high-alumina refractory layer (21) and the expanded graphite layer (22).

5. A refractory protective coating according to claim 4, characterised in that: The inorganic fibers can be ceramic fibers or glass fibers.

6. A refractory protective coating according to claim 1, characterized in that: The surface layer (4) is selected from inorganic-organic hybrid coatings.

7. A refractory protective coating according to claim 1, characterized in that: The top coat (5) is selected from silicate-acrylic resin coatings.

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