A high hiding thin coat epoxy polyester powder coating

Abstract

The utility model relates to a high-hiding thin-coated epoxy polyester powder coating, comprising a metal substrate, wherein shallow grooves are evenly distributed on the upper and lower surfaces of the metal substrate, the outer surfaces of the shallow grooves are connected to an anti-rust layer, a waterproof layer is arranged on the outer surface of the anti-rust layer, a heat-insulating layer is arranged on the upper end of the upper waterproof layer, a covering layer is arranged on the upper end of the heat-insulating layer, and the covering layer is an epoxy polyester layer; by arranging the covering layer, during the high-temperature reaction of polyester resin and epoxy resin using flake powder, the molecular bonds between them are easily broken, the reaction is more complete, and the color difference caused by uneven film thickness is reduced; by adding polarity-treated colorant and excess semiconductor during the reaction of polyester resin and epoxy resin, the colorant shell floats to the surface, the coloring is uniform, the film thickness is easier to control during spraying, and the overall hiding power is increased; by arranging the heat-insulating layer, a good heat-insulating effect is achieved, ensuring that the coating surface maintains a normal temperature, and improving safety.

Description

Technical Field

[0001] The utility model relates to the technical field of epoxy polyester powder coatings, in particular to a high hiding thin-coating epoxy polyester powder coating. Background Art

[0002] Epoxy polyester powder coatings are widely used in steel structures, shipbuilding, chemicals, automobiles, furniture, daily necessities and other fields because of their excellent corrosion resistance, good weather resistance, rich colors, environmental protection and health. However, they also have problems such as uneven film thickness, easy color difference, poor fluidity, which is not conducive to the dispersion of pigments, and low hiding power. Therefore, we have developed a high hiding thin-coat epoxy polyester powder coating.

[0003] Patent number CN202221413335.2 is a Chinese utility model patent, which discloses a railway spring bar protected by an epoxy zinc-based polyester composite coating, belonging to the field of surface treatment of metal products, including a railway spring bar substrate; the railway spring bar substrate is provided with an end protection layer at its end and a bending portion protection layer at its bending portion; the rust removal grade of the surface of the railway spring bar substrate is not less than Sa2 1 / 2 , roughness Rz20μm~100μm, and an epoxy zinc-based polyester composite coating is coated on its surface; the epoxy zinc-based polyester composite coating includes a base layer and a surface layer, wherein the base layer is an epoxy zinc-based powder coating with a thickness of 20μm~80μm, and the surface layer is a polyester powder coating with a coating thickness of 40μm~100μm; the utility model is energy-saving, environmentally friendly, economical, efficient, suitable for large-scale production, has excellent corrosion resistance and wear resistance, low protection cost, broad market prospects, and significant economic benefits, but the utility model has the following problems: first, it does not have heat insulation and scalding prevention functions, and the air surface is prone to heat up in high temperature weather in summer, which poses a safety risk; secondly, it does not have poor fluidity, the colorant is easy to deposit, and the covering power is poor. Utility Model Content

[0004] The purpose of the utility model is to address the deficiencies of the prior art. By providing a covering layer, a heat insulating layer, and adding polarity treated colorants and excess semiconductors during the reaction process of polyester resin and epoxy resin, the utility model solves the technical problems of the existing epoxy polyester powder coatings, such as poor fluidity leading to easy accumulation of colorants, low overall covering power, poor heat insulation and potential safety hazards.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high-hiding thin-coat epoxy polyester powder paint coating comprises a metal substrate, wherein shallow grooves are evenly distributed on the upper and lower surfaces of the metal substrate, the outer surface of the shallow grooves is connected to an anti-rust layer, the outer surface of the anti-rust layer is provided with a waterproof layer, the upper end of the waterproof layer is provided with a heat insulation layer, the upper end of the heat insulation layer is provided with a covering layer, the covering layer is an epoxy polyester layer, and the epoxy polyester layer is mainly composed of a reaction combination of polyester resin and epoxy resin.

[0007] As a preference, the polyester resin is a high-transmittance resin, and the polyester resin and the epoxy resin are both flake powders.

[0008] As a preference, an excess semiconductor is added during the reaction of the polyester resin and the epoxy resin, and a polarity-treated colorant is added during the reaction of the polyester resin and the epoxy resin.

[0009] Preferably, the heat-insulating layer comprises a heat-insulating putty layer, a hollow layer is provided at the upper end of the heat-insulating putty layer, a clay heat-insulating layer is provided at the upper end of the hollow layer, and a diatomaceous earth particle layer is provided inside the hollow layer.

[0010] As a preference, the anti-rust layer comprises a rust-transforming layer, an end of the rust-transforming layer away from the metal substrate is provided with a bonding primer layer, and an end of the bonding primer layer away from the metal substrate is provided with an outer coating paint layer.

[0011] Preferably, the bonding primer layer is a water-based inorganic zinc-rich primer layer, an aluminum-based compound anti-rust coating is provided between the outer coating layer and the bonding primer layer, and the waterproof layer is a silicone waterproof layer.

[0012] Beneficial effects of the utility model:

[0013] (1) In the utility model, a covering layer is provided, and during the high-temperature reaction of polyester resin and epoxy resin in the form of flake powder, the molecular bonds between them are easily broken, and the reaction is more complete. In addition, a highly transparent resin is used, which can reduce the color difference caused by uneven film thickness and improve the aesthetics compared with other resins.

[0014] (2) In the present invention, polarity-treated pigments and excess semiconductors are added during the reaction of polyester resin and epoxy resin, so that the pigments can easily float to the surface, reduce viscosity, and fully disperse the pigments in a heat-cured molten state, thereby making the coloring uniform. It is easier to control the film thickness during spraying, avoiding over-thickness or over-thinness, thereby increasing the overall hiding power.

[0015] (3) In the present invention, a heat-insulating layer is provided. The metal substrate is easy to absorb and conduct heat at high temperature, which poses a safety hazard if people touch it. Therefore, providing a heat-insulating layer can ensure that the coating surface maintains a normal temperature, thereby improving safety.

[0016] In summary, the device has the advantages of simple structure and can effectively and evenly sizing, and is particularly suitable for the technical field of textile sizing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 Schematic diagram of the structure of a high hiding thin-coat epoxy polyester powder coating.

[0019] Figure 2 This is a schematic diagram of the structure of the covering layer.

[0020] Figure 3 It is a schematic cross-sectional view of the thermal insulation layer.

[0021] Figure 4 It is a schematic diagram of the structure of the anti-rust layer. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present utility model are clearly and completely described below in conjunction with the accompanying drawings.

[0023] Embodiment 1

[0024] like Figures 1 to 4 As shown, the utility model provides a high-hiding thin-coat epoxy polyester powder coating, including a metal substrate 1, which provides a supporting foundation. Shallow grooves 2 are evenly distributed on the upper and lower surfaces of the metal substrate 1 to increase the roughness and contact area between the metal substrate 1 and the anti-rust layer 3, so that the anti-rust layer 3 can be firmly fixed on the metal substrate 1. The outer surface of the shallow groove 2 is connected to the anti-rust layer 3 to provide anti-rust protection for the metal substrate 1 to prevent the metal substrate 1 from being corroded by rust stains and broken. The outer surface of the anti-rust layer 3 is provided with a waterproof layer 4 to prevent external water stains from corroding the anti-rust layer 3 and the metal substrate 1, and play a good waterproof role. The upper end of the waterproof layer 4 on the upper side is provided with a partition Thermal layer 5, the metal substrate 1 is easy to absorb heat and conduct heat under high temperature conditions, and there are safety hazards when people touch it. Therefore, the thermal insulation layer 5 is provided to ensure that the coating surface maintains room temperature and improve safety. The upper end of the thermal insulation layer 5 is provided with a covering layer 6, which plays a good covering and beautification role. The covering layer 6 is an epoxy polyester layer, which has excellent corrosion resistance, good weather resistance, and rich colors. It is environmentally friendly and healthy and is widely used in steel structures, shipbuilding, chemicals, automobiles, furniture, daily necessities and other fields. The epoxy polyester layer is mainly composed of a reaction combination of polyester resin 61 and epoxy resin 62. High heat is generated during the reaction and can be reused to avoid premature reaction of powder materials.

[0025] Further, if Figure 2 As shown, the polyester resin 61 is a highly transparent resin, which plays a role in reducing the color difference caused by uneven film thickness, and the polyester resin 61 and the epoxy resin 62 are both flake powders. The flakes have short molecular chains, weak intermolecular bonding forces and are easy to grind, making it easy to break the molecular chains between the materials, making the reaction more complete.

[0026] Furthermore, when the polyester resin 61 and the epoxy resin 62 react, an excess of semiconductor 63 is added, which makes it easier to control the film thickness during spraying, thereby avoiding spraying too thick or too thin, increasing the overall covering power, and improving the aesthetics. When the polyester resin 61 and the epoxy resin 62 react, a polarity-treated colorant 64 is added, so that the colorant can easily float to the surface, reducing the viscosity, so that the colorant in the heat-cured molten state can be fully dispersed, thereby making the coloring uniform.

[0027] Further, if Figure 3 As shown, the thermal insulation layer 5 includes a thermal insulation putty layer 51, which has good adhesion and leveling ability, and low thermal conductivity, so that the waterproof layer 4 and the thermal insulation layer 5 are tightly connected, and the flatness of the putty surface is ensured. A hollow layer 52 is provided at the upper end of the thermal insulation putty layer 51 to provide a placement space for the diatomaceous earth particle layer 54, and a clay thermal insulation layer 53 is provided at the upper end of the hollow layer 52. The edges of the thermal insulation putty layer 51 and the clay thermal insulation layer 53 are adhered to each other. The clay thermal insulation layer 53 has the function of filling gaps, ensuring a smooth surface, and providing a basis for the spraying and flattening of the covering layer 6. It also has good sealing performance and reinforcement, providing double protection for the metal substrate 1, and a diatomaceous earth particle layer 54 is provided inside the hollow layer 52. It is a siliceous rock widely used in paint additives, and has the characteristics of stable chemical properties and heat resistance. Its heat transfer coefficient is relatively low, so that the thermal insulation layer 5 achieves a good thermal insulation effect.

[0028] Further, if Figure 4 As shown, the anti-rust layer 3 includes a rust-converting layer 31, which is a conversion type rust-bearing primer, which is directly applied to the outer surface of the metal substrate 1. In case the metal substrate 1 is rusted, the rust can react chemically with the conversion type rust-bearing primer, so that the harmful rust is converted into a complex or chelate, which is fixed with a film-forming substance to form a protective coating. The end of the rust-converting layer 31 away from the metal substrate 1 is provided with a bonding primer layer 32. When rust appears on the surface of the metal substrate 1, it may cause holes in the rust-converting layer 31, and then local anti-rusting occurs. The bonding primer layer 32 makes up for the holes and exerts good anti-rust and anti-corrosion performance. The end of the bonding primer layer 32 away from the metal substrate 1 is provided with an outer coating layer 33, which is a topcoat with acid and alkali resistance, such as epoxy vinyl resin acid and alkali resistant topcoat, KN22 polymer ceramic polymer material.

[0029] Furthermore, the bonding primer layer 32 is a water-based inorganic zinc-rich primer layer, which has good bonding strength and good anti-rust and corrosion resistance. It can be used in conjunction with most anti-rust paints and topcoats. In addition, it has excellent heat resistance. An aluminum-based compound anti-rust coating 34 is provided between the outer paint layer 33 and the bonding primer layer 32, which has good resistance to cold and heat. When the rust layer 31 is in an environment with a large temperature difference, the aluminum-based compound anti-rust coating can play a good protective role. The waterproof layer 4 is a silicone waterproof layer, which forms a hydrophobic layer on the surface of the anti-rust layer 3, thereby preventing external water from penetrating inward and internal salt solution from migrating outward, thereby preventing weathering caused by salting out.

[0030] Working process: first, a special tool is used to evenly form a shallow groove 2 on the surface of the metal substrate 1, and then a rust-proof layer 31 is sprayed on the upper and lower surfaces of the metal substrate 1, which plays an anti-rust role when the metal substrate 1 is rusted; further, a bonding primer layer 32 is sprayed on the outer surface of the rust-proof layer 31 to make up for the loopholes in the rust-proof layer 31 and prevent rust and corrosion; further, an outer paint layer 33 is sprayed on the outer surface of the bonding primer layer 32 to form an anti-rust layer 3; further, a waterproof layer 4 is sprayed on the outside of the anti-rust layer 3 to prevent external water stains from corroding the anti-rust layer 3 and the metal substrate 1; further, a heat-insulating putty layer 51 is applied to the outside of the waterproof layer 4, and a diatomaceous earth particle layer 54 is filled in the hollow layer 52, and then a clay insulation layer 53 is applied to form an insulation layer 5; further, a covering layer 6 is sprayed on the outer surface of the insulation layer 5, and it is dried to complete the spraying.

[0031] In the description of the present invention, it should be understood that the terms "front and back", "left and right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the equipment or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the utility model.

[0032] Of course, in the present technical solution, those skilled in the art should understand that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0033] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art under the technical guidance of the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A high hiding thin-coat epoxy polyester powder coating, characterized in that: The invention comprises a metal substrate (1), wherein shallow grooves (2) are evenly distributed on the upper and lower surfaces of the metal substrate (1), the outer surface of the shallow grooves (2) is connected to an anti-rust layer (3), the outer surface of the anti-rust layer (3) is provided with a waterproof layer (4), the upper end of the waterproof layer (4) is provided with a heat insulating layer (5), the upper end of the heat insulating layer (5) is provided with a covering layer (6), the covering layer (6) is an epoxy polyester layer, and the epoxy polyester layer is mainly formed by reacting and combining a polyester resin (61) and an epoxy resin (62).

2. A high hiding thin-coat epoxy polyester powder coating according to claim 1, characterized in that: The polyester resin (61) is a highly transparent resin, and both the polyester resin (61) and the epoxy resin (62) are flake powders.

3. A high hiding thin-coat epoxy polyester powder coating according to claim 2, characterized in that: When the polyester resin (61) and the epoxy resin (62) react, an excess semiconductor (63) is added, and when the polyester resin (61) and the epoxy resin (62) react, a polar treatment colorant (64) is added.

4. A high hiding thin-coat epoxy polyester powder coating according to claim 1, characterized in that: The heat insulating layer (5) comprises a heat insulating putty layer (51), a hollow layer (52) is provided at the upper end of the heat insulating putty layer (51), a mastic heat insulating layer (53) is provided at the upper end of the hollow layer (52), and a diatomaceous earth particle layer (54) is provided inside the hollow layer (52).

5. A high hiding thin-coat epoxy polyester powder coating according to claim 1, characterized in that: The anti-rust layer (3) comprises a rust-transforming layer (31), an end of the rust-transforming layer (31) away from the metal substrate (1) is provided with a bonding primer layer (32), and an end of the bonding primer layer (32) away from the metal substrate (1) is provided with an outer coating layer (33).

6. A high hiding thin-coat epoxy polyester powder coating according to claim 5, characterized in that: The bonding primer layer (32) is a water-based inorganic zinc-rich primer layer, an aluminum-based compound anti-rust coating (34) is provided between the outer coating layer (33) and the bonding primer layer (32), and the waterproof layer (4) is an organic silicon waterproof layer.

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