High-temperature-resistant non-stick coating and production process thereof

Abstract

The invention provides a high-temperature-resistant non-stick coating and a production process thereof, and relates to the field of coating processing and production. Comprising the following raw materials in parts by weight: 65 to 67 parts of temperature-resistant modified resin, 0.3 to 0.4 part of spherical wax powder, 0.4 to 0.6 part of a dispersing agent, 0.1 to 0.3 part of a wetting agent, 0.4 to 0.6 part of M-5, 0.7 to 0.9 part of bentonite, 2 to 4 parts of C310-12 black powder, 0.6 to 0.8 part of a flatting agent, 1.6 to 1.9 parts of 167 amino resin, 4.3 to 4.6 parts of an adhesion promoter, 4 to 6 parts of a closed curing agent, 4.3 to 4.6 parts of butyl acetate, 9 to 11 parts of PMA and 1 to 3 parts of ethyl acetate. According to the present invention, the nanometer sand mill is adopted to repeatedly grind the material until the fineness is less than micron, the circulating pipeline is adopted to achieve the repeated circulating grinding of the material, and the filter screen is adopted to intercept the coarse particles so as to ensure the sufficient material grinding and the uniform fineness, such that the temperature-resistant modified resin, the C311 black powder and other components can be completely dispersed through the fine grinding; a foundation is laid for forming a compact coating after the coating is baked at a high temperature, a product is directly assisted to achieve super-strong high temperature resistance of 500-600 DEG C, and the problems that an existing coating is poor in high temperature resistance and the like, many in process defects and limited in application are solved.

Description

Technical Field

[0001] This invention relates to the field of coating processing and production technology, and in particular to a high-temperature resistant non-stick coating and its production process. Background Technology

[0002] With the continuous development of industry, the performance requirements for coatings are getting higher and higher, especially for coatings used in high-temperature environments. They not only need to have good high-temperature resistance, but also need to have non-stick properties, salt spray resistance, solvent resistance, and other properties.

[0003] Based on the above, existing high-temperature resistant non-stick coatings and their production processes have the following shortcomings: Existing coatings are prone to cracking, peeling, or performance degradation under high-temperature environments, making it difficult to simultaneously achieve high-temperature resistance, high salt spray resistance, and high solvent resistance. They also suffer from low hardness and poor adhesion, affecting their service life. In traditional paint manufacturing processes, uneven mixing of heat-resistant modified resins, functional fillers, and additives makes it difficult for sand milling equipment to control material fineness below micrometers, resulting in low coating gloss and poor smoothness, while also affecting the stability of high-temperature resistance and salt spray resistance. Existing processes also suffer from frequent opening of the coating container during raw material addition, insufficient sand milling circulation, and low output control precision, leading to significant material waste and batch-to-batch variations. This makes it difficult to consistently achieve high gloss and high adhesion, limiting the application range of coatings. Summary of the Invention

[0004] This invention relates to a high-temperature resistant non-stick coating and its manufacturing process. The coating features a composite substrate with multi-layer composite to improve the strength and insulation properties of the composite substrate, thereby ensuring the safety of the composite substrate during use and reducing safety hazards.

[0005] This invention provides a high-temperature resistant non-stick coating, comprising the following raw materials in parts by weight: 66 parts of heat-resistant modified resin, 0.5 parts of spherical wax powder, 0.5 parts of dispersant, 0.2 parts of wetting agent, 0.5 parts of M-5, 0.8 parts of bentonite, 3 parts of C311 black powder, 0.7 parts of leveling agent, 1.8 parts of 167 amino resin, 4.5 parts of adhesion promoter, 5 parts of sealing and curing agent, 4.5 parts of butyl acetate, 10 parts of PMA, and 2 parts of ethyl acetate.

[0006] A production process for a high-temperature resistant non-stick coating includes the following steps: 1) Preparation of 25.5% heat-resistant modified silicone resin black paste: 14.5 parts heat-resistant modified resin, 0.5 parts spherical wax powder, 0.5 parts dispersant, 0.2 parts wetting agent, 0.5 parts M-5 additive, 0.8 parts bentonite, 3 parts C311 black powder, 0.5 parts leveling agent, 5 parts PMA, grind in a nano-sand mill 3-5 times until the fineness is below 5 microns, and prepare 100 parts of black paste; 2). Take 25.5 parts of the heat-resistant modified silicone resin black paste obtained in step 1), add 51.5 parts of heat-resistant modified resin and 1.8 parts of 167 amino resin in sequence, and mix and stir evenly. 3) Add 0.2 parts leveling agent, 4.5 parts adhesion promoter, and 5 parts sealing and curing agent in sequence, and stir well; 4) Finally, add 4.5 parts butyl acetate, 5 parts PMA, and 2 parts ethyl acetate solvent, adjust the viscosity to 65 kDa, and stir well. 5) Quality inspection, packaging, and warehousing.

[0007] Furthermore, the nano-sand mill in step 1) includes a nano-sand mill jar, the top of which is fixedly connected to a top cover. A stirring motor is fixedly installed at the middle of the top of the top cover. A stirring shaft is connected to the bottom of the rotating shaft of the stirring motor. The bottom of the rotating shaft of the stirring motor passes through the bottom of the nano-sand mill jar and is threadedly connected to a locking nut. A discharge pipe is fixedly connected to the bottom of the nano-sand mill jar.

[0008] Furthermore, a support base is fixedly installed at the bottom center of the inner cavity of the nano-sand milling jar, and an annular groove is formed in the top end face of the support base. Circulation pipes are symmetrically connected to the left and right sides of the bottom of the nano-sand milling jar. The circulation pipes are arranged in a ring shape to connect the bottom of the nano-sand milling jar and the top of the side wall. A filter screen is fixedly installed at the end of the circulation pipe at the bottom of the nano-sand milling jar. Discharge ports are symmetrically formed on the front and rear sides of the bottom of the nano-sand milling jar.

[0009] Furthermore, the top of the grinding jar cover has four filling ports fixedly connected in a circular array, and a split hanging lug is fixedly installed on the top end face of the grinding jar cover between adjacent filling ports.

[0010] Furthermore, a circulating fan blade is fixedly installed in the middle of the drive shaft of the stirring motor, the lower end of the drive shaft of the stirring motor is a key shaft, and a locking thread is provided on the outer side wall of the bottom end of the drive shaft of the stirring motor, and a locking nut is threaded onto the locking thread.

[0011] Furthermore, a fitting groove is provided in the top end face of the stirring shaft, which is engaged with the drive shaft of the stirring motor. A keyway is provided in the bottom end face of the fitting groove, which matches the keyway at the lower end of the drive shaft of the stirring motor. Six stirring paddles are fixedly connected in a ring array on the outer wall of the stirring shaft, and the stirring paddles are shaped like a "person".

[0012] Furthermore, the discharge pipe is installed in a ring shape at the bottom of the nano-sand milling jar, and discharge heads are fixedly connected to the top of the front and rear ends of the discharge pipe. The discharge heads protrude and are inserted into the discharge port of the nano-sand milling jar. The top of the outer wall of the discharge head is mesh-like, and an electric valve is fixedly installed in the discharge head at the bottom of the discharge port.

[0013] This invention provides a high-temperature resistant non-stick coating and its manufacturing process, which has the following beneficial effects: 1. The material is repeatedly ground to a fineness below micrometer using a nano-grinding mill, and the material is repeatedly circulated and ground using a circulation pipeline. In addition, a filter screen is used to intercept coarse particles, ensuring that the material is ground thoroughly and the fineness is uniform. This fine grinding allows the components such as the temperature-resistant modified resin and C311 black powder to be fully dispersed, laying the foundation for the formation of a dense coating after the coating is baked at high temperature. This directly helps the product achieve a super high temperature resistance of 500-600 degrees Celsius, while improving the density of the coating to enhance its resistance to salt spray and solvents. It also provides structural support for the high hardness of the pencil, which reaches 4-6H.

[0014] 2. The device allows for the simultaneous or separate addition of multiple raw materials through a ring array of filling ports, reducing the number of times the lid is opened and preventing localized material accumulation. Combined with the multi-directional shearing force and efficient mixing capability of the "human"-shaped stirring paddle, it ensures the uniform fusion of components such as temperature-resistant modified resin, sealing and curing agent, and adhesion promoter. This uniform mixing allows each functional additive to fully exert its effect, not only improving the adhesion promotion effect of the coating and ensuring the "ultra-high adhesion" advantage, but also allowing leveling agents, spherical wax powder, etc. to be evenly distributed, helping to achieve high gloss and a smooth feel, while avoiding performance shortcomings caused by uneven composition.

[0015] 3. The stable connection between the stirring motor and the stirring shaft, the precisely controlled discharge system by the electric valve, and the balanced collection design of the annular discharge pipe ensure the stability and continuity of the production process. This stable production not only guarantees the consistency of coating batches, allowing the product to consistently demonstrate its comprehensive advantages such as high temperature resistance, high hardness, and high adhesion in different application scenarios, but also improves production efficiency through efficient grinding and automated control, adapting to the wide range of application needs of the product. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0017] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0018] In the attached diagram: Figure 1 This is a process flow diagram of an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the right front side axial view of a high-temperature resistant non-stick coating and its production process according to an embodiment of the present invention.

[0020] Figure 3 This is a cross-sectional schematic diagram of the internal structure of a nano-sand grinding jar used in an embodiment of the present invention, which describes a high-temperature resistant non-stick coating and its production process.

[0021] Figure 4 This is a schematic diagram showing the overall disassembled structure of a high-temperature resistant non-stick coating and its production process according to an embodiment of the present invention.

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of a nano-sand grinding jar for a high-temperature resistant non-stick coating and its production process according to an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the bottom structure of the interlocking key shaft and interlocking keyway connection in an embodiment of the present invention, which describes a high-temperature resistant non-stick coating and its production process.

[0024] Figure 7 This is a schematic diagram of the overall bottom structure of a high-temperature resistant non-stick coating and its production process according to an embodiment of the present invention.

[0025] Figure 8 This is a schematic diagram of a nano-sand milling jar showing the production process of a high-temperature resistant non-stick coating and its manufacturing process, according to an embodiment of the present invention.

[0026] Figure 9 This is a cross-sectional view of the stirring shaft of a high-temperature resistant non-stick coating and its production process according to an embodiment of the present invention.

[0027] List of reference numerals 1. Nano-grinding jar; 101. Support base; 102. Circulation pipeline; 10201. Filter screen; 103. Discharge port; 2. Top cover of the grinding jar; 201. Filler inlet; 202. Split hanging lug; 3. Stirring motor; 301. Circulation fan blade; 302. Engaging key shaft; 303. Locking thread; 4. Stirring shaft; 401. Stirring paddle; 402. Fitting groove; 403. Engaging keyway; 5. Locking nut; 6. Discharge pipe; 601. Discharge head; 602. Electric valve. Detailed Implementation

[0028] To make the objectives, solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Unless otherwise stated, the terms used herein have their ordinary meanings in the art. The same reference numerals in the drawings represent the same parts.

[0029] Example 1: Please refer to Figures 1 to 9 As shown: This invention provides a high-temperature resistant non-stick coating, comprising the following raw materials in parts by weight: 66 parts of heat-resistant modified resin, 0.5 parts of spherical wax powder, 0.5 parts of dispersant, 0.2 parts of wetting agent, 0.5 parts of M-5, 0.8 parts of bentonite, 3 parts of C311 black powder, 0.7 parts of leveling agent, 1.8 parts of 167 amino resin, 4.5 parts of adhesion promoter, 5 parts of sealing and curing agent, 4.5 parts of butyl acetate, 10 parts of PMA, and 2 parts of ethyl acetate.

[0030] A production process for a high-temperature resistant non-stick coating includes the following steps: 1) Preparation of 25.5% heat-resistant modified silicone resin black paste: 14.5 parts heat-resistant modified resin, 0.5 parts spherical wax powder, 0.5 parts dispersant, 0.2 parts wetting agent, 0.5 parts M-5 additive, 0.8 parts bentonite, 3 parts C311 black powder, 0.5 parts leveling agent, 5 parts PMA, grind in a nano-sand mill 3-5 times until the fineness is below 5 microns, and prepare 100 parts of black paste; 2). Take 25.5 parts of the heat-resistant modified silicone resin black paste obtained in step 1), add 51.5 parts of heat-resistant modified resin and 1.8 parts of 167 amino resin in sequence, and mix and stir evenly. 3) Add 0.2 parts leveling agent, 4.5 parts adhesion promoter, and 5 parts sealing and curing agent in sequence, and stir well; 4) Finally, add 4.5 parts butyl acetate, 5 parts PMA, and 2 parts ethyl acetate solvent, adjust the viscosity to 65 kDa, and stir well. 5) Quality inspection, packaging, and warehousing.

[0031] Further, the nano-grinding mill in step 1) includes a nano-grinding jar 1. A top cover 2 is fixedly connected to the top of the nano-grinding jar 1. A stirring motor 3 is fixedly installed at the center of the top of the top cover 2. A stirring shaft 4 is connected to the bottom of the rotating shaft of the stirring motor 3. The bottom of the rotating shaft of the stirring motor 3 passes through the bottom of the nano-grinding jar 1 and is threaded with a locking nut 5. A discharge pipe 6 is fixedly connected to the bottom of the nano-grinding jar 1. A support base 101 is fixedly installed at the center of the bottom of the inner cavity of the nano-grinding jar 1. An annular groove is formed in the top end face of the support base 101. Circulation pipes 102 are symmetrically connected to the left and right sides of the bottom of the nano-grinding jar 1. The circulation pipes 102 encircle the bottom and top of the side walls of the nano-grinding jar 1. A filter screen 10201 is fixedly installed at the end of the circulation pipe 102 at the bottom of the nano-grinding jar 1. The bottom of the grinding jar 1 has symmetrically arranged discharge ports 103 on both the front and rear sides. Specifically, the nano-grinding jar 1 serves as the core grinding container, providing a closed grinding space for coating materials; the top cover 2 of the grinding jar achieves sealing and supports the stirring motor 3; the stirring motor 3 provides power to the stirring shaft 4, and with the locking nut 5, it can securely connect the rotating shaft of the stirring motor 3 and the stirring shaft 4 to prevent loosening during grinding; the discharge pipe 6 is used to centrally discharge the ground material; the annular groove of the support base 101 can help position the bottom of the stirring shaft 4 and reduce its shaking during operation; the circulation pipe 102 can transport the material at the bottom of the grinding jar back to the top, realizing multiple circulation grinding of the material and improving grinding uniformity; the filter screen 10201 can intercept particles that do not meet the fineness requirements and prevent them from entering the circulation and causing insufficient grinding; the discharge port 103 provides a channel for the transfer of material from the grinding jar to the discharge pipe 6.

[0032] The top of the sand mill jar 2 is fixedly connected with four filling ports 201 in a ring array. The top surface of the top of the sand mill jar 2 between adjacent filling ports 201 is fixedly installed with split hanging ears 202. Specifically, the four filling ports 201 can add different kinds of raw materials (such as heat-resistant modified resin, spherical wax powder, etc.) at the same time or separately, reducing the number of times the lid is opened and improving the feeding efficiency. The ring array distribution can make the material fall more evenly into the nano sand mill jar 1 and avoid local accumulation. The split hanging ears 202 make it easy to separate the top of the sand mill jar 2 from the tank body with the help of lifting tools, which facilitates the cleaning, maintenance and replacement of parts inside the equipment.

[0033] The stirring motor 3 has a circulating fan blade 301 fixedly installed in the middle of its drive shaft. The lower end of the drive shaft is a keyway 302. A locking thread 303 is provided on the outer side wall of the bottom end of the drive shaft, and a locking nut 5 is threaded onto the locking thread 303. A fitting groove 402 is provided on the top end face of the stirring shaft 4, which is engaged with the drive shaft of the stirring motor 3. A keyway 403 is provided on the bottom end face of the fitting groove 402, matching the keyway 302 at the lower end of the drive shaft of the stirring motor 3. Six stirring paddles 401 are fixedly connected in a circular array on the outer side wall of the stirring shaft 4. The stirring paddles 401 are shaped like a "person." Specifically, when the circulating fan blade 301 rotates with the drive shaft of the stirring motor 3, it accelerates the airflow at the top of the nano-sand grinding jar 1. The movement causes the finely ground materials to float in the nano-grinding jar 1, allowing for better grinding of larger particles. This, combined with the circulation pipe 102, enhances material circulation efficiency. The matching structure of the interlocking key shaft 302 and the interlocking keyway 403 transmits greater torque, preventing slippage between the stirring shaft 4 and the drive shaft of the stirring motor 3, ensuring stable stirring force output. The locking thread 303, in conjunction with the locking nut 5, further reinforces the connection between the drive shaft and the stirring shaft 4, preventing axial displacement. The six annular array of "human"-shaped stirring paddles 401 on the outer side of the stirring shaft 4 significantly increases the contact area with the material. The "human"-shaped structure of the stirring paddles 401 generates multi-directional shear force on the material during rotation, promoting material dispersion and mixing. Simultaneously, it increases the collision frequency between the grinding media (such as zirconia beads) and the material, accelerating the grinding process to a fineness below micrometers.

[0034] The discharge pipe 6 is installed in a ring shape at the bottom of the nano-grinding jar 1. The top of the front and rear ends of the discharge pipe 6 is fixedly connected to the discharge head 601, which protrudes and inserts into the discharge port 103 of the nano-grinding jar 1. The top of the outer wall of the discharge head 601 is mesh-like. An electric valve 602 is fixedly installed in the discharge head 601 at the bottom of the discharge port 103. Specifically, the ring-shaped discharge pipe 6 can evenly collect materials from all parts of the bottom of the nano-grinding jar 1, avoiding local residue; the mesh top of the discharge head 601 can filter out substandard coarse particles, ensuring that the fineness of the discharged material is qualified; its protruding insertion structure ensures a tight connection with the discharge port 103, preventing material leakage; the electric valve 602 can precisely control the timing and flow of discharge, which is convenient for coordinating with the grinding process to achieve automated discharge and improve production efficiency.

[0035] The specific usage and function of this embodiment are as follows: In this invention, firstly, different raw materials such as heat-resistant modified resin and spherical wax powder are added to the nano-grinding jar 1 in proportion through the four filling ports 201 arranged in a ring on the top cover 2 of the sand mill jar. The ring-shaped filling ports 201 allow the materials to fall evenly and reduce the frequency of opening the cover. The stirring motor 3 is started, and its drive shaft drives the stirring shaft 4 and the six "human"-shaped stirring paddles 401 on the outside to rotate at high speed. The "human"-shaped structure generates multi-directional shear force to promote the dispersion and mixing of materials. At the same time, the circulating fan blade 301 in the middle of the drive shaft accelerates the air flow in the jar, causing the materials to float and, in conjunction with the bottom circulation pipe 102, allowing the materials to flow from the bottom of the nano-grinding jar 1 through... After the filter screen 10201 intercepts coarse particles, it is circulated to the top for multiple grinding to improve uniformity. The annular groove of the support base 101 helps to position the bottom of the stirring shaft 4 and reduce shaking. After the material is ground to a fineness of less than microns, the electric valve 602 in the discharge head 601 at the bottom of the discharge port 103 is opened. After the material is filtered again through the mesh top of the discharge head 601, it is evenly discharged through the annular discharge pipe 6. If the equipment needs to be cleaned or maintained, the top cover 2 of the sand mill can be lifted and separated with the disassembly lug 202. Throughout the process, the interlocking key shaft 302 and the interlocking keyway 403 transmit large torque, and the locking thread 303 and the locking nut 5 reinforce the connection to ensure stable operation of the equipment.

[0036] The above description is merely an exemplary embodiment of the present invention and is not intended to limit the scope of protection of the present invention, which is determined by the appended claims.

Claims

1. A high temperature resistant non-stick coating characterized in that, It includes the following raw materials by weight: temperature resistant modified resin 65-67 parts, spherical wax powder 0.3-0.4 parts, dispersing agent 0.4-0.6 parts, wetting agent 0.1-0.3 parts, M-5 0.4-0.6 parts, bentonite 0.7-0.9 parts, C310-12 black powder 2-4 parts, leveling agent 0.6-0.8 parts, 167 amino resin 1.6-1.9 parts, adhesion promoter 4.3-4.6 parts, sealing curing agent 4-6 parts, butyl acetate 4.3-4.6 parts, PMA 9-11 parts, ethyl acetate 1-3 parts.

2. A high temperature resistant non-stick coating according to claim 1, characterized in that, It includes the following raw materials by weight: temperature resistant modified resin 66 parts, spherical wax powder 0.5 parts, dispersing agent 0.5 parts, wetting agent 0.2 parts, M-5 0.5 parts, bentonite 0.8 parts, C311 black powder 3 parts, leveling agent 0.7 parts, 167 amino resin 1.8 parts, adhesion promoter 4.5 parts, sealing curing agent 5 parts, butyl acetate 4.5 parts, PMA 10 parts, ethyl acetate 2 parts.

3. A high temperature resistant non-stick coating according to claim 2, characterised in that, Its production process includes the following steps: 1) Preparation of concentration 25.5% temperature resistant modified silicone resin black paste: temperature resistant modified resin 14.5 parts, spherical wax powder 0.5 parts, dispersing agent 0.5 parts, wetting agent 0.2 parts, M-5 0.5 parts, bentonite 0.8 parts, C311 black powder 3 parts, leveling agent 0.5 parts, PMA 5 parts, into nano sand mill grinding 3-5 times, grinding to fineness below 5 microns, made into 100 parts black paste; 2) Take the temperature resistant modified silicone resin black paste prepared in step 1) 25.5 parts, add temperature resistant modified resin 51.5 parts, 167 amino resin 1.8 parts, mix and stir evenly; 3) Then add 0.2 parts of leveling agent, 4.5 parts of adhesion promoter, 5 parts of sealing curing agent and stir evenly; 4) Finally add 4.5 parts of butyl acetate, 5 parts of PMA, 2 parts of ethyl acetate solvent, adjust the viscosity to 65 ku, and stir evenly; 5) Quality inspection, packaging and storage.

4. A high temperature resistant non-stick coating according to claim 3, characterised in that, The nano sand mill in step 1) includes a nano sand mill tank (1), the top of which is fixedly connected with a sand mill tank top cover (2), the top of the sand mill tank top cover (2) is fixedly installed with a stirring motor (3), the bottom of the rotating shaft of the stirring motor (3) is connected with a stirring shaft (4), the bottom of the rotating shaft of the stirring motor (3) penetrates through the bottom of the nano sand mill tank (1) and is threadedly connected with a locking nut (5), and the bottom of the nano sand mill tank (1) is fixedly connected with a discharge pipe (6).

5. A high temperature resistant non-stick coating according to claim 4, characterised in that, The inner cavity bottom of the nano sand mill tank (1) is fixedly installed with a supporting base (101), an annular groove is formed in the top end face of the supporting base (101), the bottom of the nano sand mill tank (1) is symmetrically connected with a circulating pipeline (102) on the left and right sides, the circulating pipeline (102) is annularly connected with the bottom and the top of the side wall of the nano sand mill tank (1), the end of the circulating pipeline (102) of the bottom of the nano sand mill tank (1) is fixedly installed with a filter screen (10201), and the bottom of the nano sand mill tank (1) is symmetrically provided with a discharge port (103) on the front and back sides.

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