Concentrated oil dispersion type silicon-based release agent and preparation method and detection method thereof

Abstract

The invention provides a concentrated oil dispersion type silicon-based release agent, a preparation method of the concentrated oil dispersion type silicon-based release agent and a detection method of the concentrated oil dispersion type silicon-based release agent. The cutting fluid is prepared from the following components in parts by weight: 70 to 88 parts of silicone oil, 1 to 2 parts of sorbitan monooleate, 1 to 3 parts of fatty alcohol-polyoxyethylene ether-3, 0.5 to 2 parts of octylphenol polyoxyethylene, 0.5 to 4 parts of polyoxyethylene sorbitan trioleate, 0.1 to 0.5 part of polyethylene glycol, 0.5 to 1 part of polypropylene glycol-7, 0.05 to 0.15 part of an anti-freezing agent, 0.15 to 0.25 part of an anti-rust agent and 0.15 to 0.25 part of an antibacterial agent. The silicon-based release agent provided by the invention adopts an oil dispersion type technology, and the prepared release agent basically does not contain volatile organic compounds after being diluted, so that the environmental pollution is reduced, and the safety performance of a working place is improved.

Description

Technical Field

[0001] This application relates to the field of metal die casting technology, specifically to a concentrated oil-dispersible silicon-based release agent and its preparation and testing methods. Background Technology

[0002] In the field of aluminum die casting, various release agents have been developed to facilitate the separation of molten metal from the mold surface and improve the quality of castings. Traditional release agents typically include solvent-based formulations or pre-formulated emulsions.

[0003] Solvent-based release agents use highly volatile organic compound (VOC) solvent formulations and can be directly coated onto the chip surface. Their advantages include mature preparation methods and ease of application. However, their disadvantages include high environmental and safety risks; easy volatilization under high temperature conditions, leading to inconsistent release performance; and the inability to adjust the concentration on-site, resulting in insufficient flexibility. Although they can effectively provide release, they often contain high concentrations of volatile organic compounds (VOCs), which can cause environmental and safety issues and complicate handling and storage.

[0004] Pre-formed emulsions or emulsifiable concentrates are ready-to-use emulsions that do not require dilution. Their advantages include immediate availability and acceptable initial emulsion stability. However, their disadvantages include large transport and storage volume, tendency to generate foam, reduced long-term stability at higher mold temperatures, susceptibility to microbial contamination, and limited flexibility in adjusting emulsion concentration under different mold or operating conditions. They often generate excessive foam during mixing or spraying, leading to uneven coating, surface defects, and inconsistent mold release.

[0005] Furthermore, these emulsions may lose stability or decompose at the high temperatures encountered during die casting, thus reducing their effectiveness in multiple casting cycles. The large volume, short shelf life, and susceptibility to microbial contamination of pre-made emulsions also present handling and logistics challenges. Existing technologies, when attempting to reduce foam or volatile organic compound (VOC) content, often result in decreased release performance or require complex multi-component formulations.

[0006] In view of this, the present invention is hereby proposed. Summary of the Invention

[0007] This application provides a concentrated oil-dispersible silicone-based release agent and its preparation and testing methods. The main purpose is to solve the problems of existing release agents containing volatile organic compounds, causing environmental and safety issues, and having poor release effects that fail to meet customer needs.

[0008] To achieve the above objectives, the present invention employs the following technical solution:

[0009] This application provides a concentrated oil-dispersible silicone-based release agent, which comprises the following components, in parts by weight:

[0010] 70-88 parts silicone oil, 1-2 parts sorbitol monooleate, 1-3 parts fatty alcohol polyoxyethylene ether-3, 0.5-2 parts octylphenol polyoxyethylene, 0.5-4 parts polyoxyethylene sorbitan trioleate, 0.1-0.5 parts polyethylene glycol, 0.5-1 parts polypropylene glycol-7, 0.05-0.15 parts antifreeze, 0.15-0.25 parts rust inhibitor, and 0.15-0.25 parts antibacterial agent.

[0011] In this application, silicone oil serves as the main oil phase, providing the necessary lubrication and mold release properties for the aluminum die-casting process. Sorbitan monooleate (SMO) is synthesized by esterification of sorbitol with monooleic acid after dehydration. Its chemical structure contains hydrophilic sorbitan anhydride groups and hydrophobic long-chain alkyl groups of oleic acid, exhibiting excellent emulsifying, dispersing, solubilizing, and stabilizing properties. Also known as Span-80, as a lipophilic nonionic surfactant, it can stabilize the oil phase and promote initial emulsification when the concentrate is diluted with water.

[0012] Fatty alcohol polyoxyethylene ether-3 (AEO-3) is formed by the condensation of fatty alcohol and ethylene oxide, and its chemical formula is C. 18 H 38 O4 (R is a C12~16 alkyl group), CAS number 3055-94-51. It is a colorless to slightly yellow transparent liquid. In this application, it functions as a hydrophilic surfactant to enhance the formation and stability of water-in-oil emulsions.

[0013] Octylphenol polyoxyethylene (TX-114) is a nonionic surfactant belonging to the alkylphenol polyoxyethylene ether (APEO) family. Its chemical structure is formed by the polymerization of octylphenol and ethylene oxide. Polyoxyethylene sorbitan trioleate (Tween-85) is a nonionic surfactant with the chemical formula C. 100 H 188 O 28 At room temperature, it is an amber-colored oily liquid. Octylphenol polyoxyethylene and polyoxyethylene sorbitan trioleate, together with monooleate sorbitol and fatty alcohol polyoxyethylene ether-3, comprehensively improve the process performance through multiple effects such as optimizing interfacial tension reduction, enhancing emulsion stability, reducing foam generation and improving mold surface wettability.

[0014] Polyethylene glycol (PEG-600) is a polymer compound formed by the polymerization of ethylene oxide, with the chemical formula HO(CH2CH2O). nH, possessing characteristics such as water solubility, lubricity, moisturizing properties, and stability, refers to polypropylene glycol-7 (PPG-7), which typically refers to polypropylene glycol (PPG-400) with an average molecular weight of approximately 400. Polypropylene glycol is a compound polymerized from propylene oxide. In this application, polyethylene glycol and polypropylene glycol-7 serve as a co-solvent and stabilizer, promoting the compatibility of the surfactant and silicone oil, adjusting viscosity to ensure the concentrate is easy to pour and uniformly water-soluble, and also acting as a lubricant to improve the performance of the release agent. The antifreeze prevents the emulsion from freezing in low-temperature environments, ensuring uniform application in cold conditions.

[0015] Meanwhile, in this application, rust inhibitors protect the mold surface and metal parts from corrosion, while antibacterial agents inhibit the growth of microorganisms in the diluted emulsion, extending the product's shelf life and ensuring the emulsion's quality remains stable after multiple uses.

[0016] This application also discloses the dosage of the aforementioned components, as their dosage has a significant impact on mold release performance. Reducing the dosage of hydrophilic surfactants (fatty alcohol polyoxyethylene ether-3, octylphenol polyoxyethylene ether, and polyoxyethylene sorbitan trioleate) may lead to incomplete emulsification or phase separation during dilution, while excessive dosage may cause excessive foaming or adverse reactions with metal surfaces. Similarly, adjusting the relative dosage of polyethylene glycol or polypropylene glycol-7 affects viscosity, emulsion droplet size, and stability—insufficient dosage results in poor surfactant solubility, while excessive dosage may reduce release efficiency or leave residues on the mold. The synergistic effect of lipophilic and hydrophilic surfactants ensures rapid formation of a low-foaming, thermally stable water-in-oil emulsion after dilution. Furthermore, the balance between silicone oil, surfactants, and co-solvents effectively avoids the formation of side reactions or degradation products.

[0017] In one specific feasible implementation, the concentrated oil-dispersible silicone-based release agent comprises the following components, by weight parts:

[0018] 75-85 parts silicone oil, 1.2-1.8 parts sorbitol monooleate, 1.5-2.5 parts fatty alcohol polyoxyethylene ether-3, 0.8-1.8 parts octylphenol polyoxyethylene, 1-3 parts polyoxyethylene sorbitan trioleate, 0.2-0.4 parts polyethylene glycol, 0.6-0.9 parts polypropylene glycol-7, 0.08-0.13 parts antifreeze, 0.18-0.22 parts rust inhibitor, and 0.18-0.22 parts antibacterial agent.

[0019] In one specific feasible implementation, the concentrated oil-dispersible silicone-based release agent comprises the following components, by weight parts:

[0020] 80 parts silicone oil, 1.5 parts sorbitol monooleate, 2 parts fatty alcohol polyoxyethylene ether-3, 1.5 parts octylphenol polyoxyethylene, 2 parts polyoxyethylene sorbitan trioleate, 0.3 parts polyethylene glycol, 0.8 parts polypropylene glycol-7, 0.10 parts antifreeze, 0.10 parts rust inhibitor and 0.10 parts antibacterial agent.

[0021] In one specific implementation scheme, the antifreeze agent may be selected from ethylene glycol and propylene glycol, the rust inhibitor may be selected from benzotriazole, sodium molybdate, and organic carboxylate rust inhibitors, and the antibacterial agent may be selected from isothiazolinone (such as CMIT / MIT) and 1,2-benzisothiazolin-3-one (BIT).

[0022] This application also provides a method for preparing the above-mentioned concentrated oil-dispersed silicone-based release agent, which includes the following steps:

[0023] Stir and heat the silicone oil;

[0024] Sorbitol monooleate, fatty alcohol polyoxyethylene ether-3, octylphenol polyoxyethylene, polyoxyethylene sorbitan trioleate, polyethylene glycol, polypropylene glycol-7, antifreeze, corrosion inhibitor and antibacterial agent are added in sequence.

[0025] After mixing thoroughly, stir to form a concentrated solution;

[0026] The concentrate was allowed to cool naturally.

[0027] In one specific implementation, the heating includes the following steps:

[0028] Continue heating at 100-110 kPa to 45-55℃ while stirring;

[0029] The stirring speed is 700-900 rpm, and the stirring time is 25-40 min.

[0030] In one specific feasible implementation, the sequential addition of sorbitol monooleate, fatty alcohol polyoxyethylene ether-3, octylphenol polyoxyethylene, polyoxyethylene sorbitan trioleate, polyethylene glycol, polypropylene glycol-7, antifreeze, corrosion inhibitor, and antibacterial agent comprises the following steps:

[0031] Add sorbitol monooleate, fatty alcohol polyoxyethylene ether-3, octylphenol polyoxyethylene, polyoxyethylene sorbitan trioleate, polyethylene glycol, polypropylene glycol-7, antifreeze, corrosion inhibitor, and antibacterial agent sequentially every 5-10 minutes.

[0032] In one specific implementation, the temperature during stirring after uniform mixing is 45-55℃, the time is 25-35 minutes, and the stirring speed is 700-900 rpm.

[0033] In one specific implementation, the natural cooling includes the following steps:

[0034] Cool the concentrated liquid naturally at 20-30℃ while stirring gently to form a release agent.

[0035] The gentle stirring speed is 100-300 rpm.

[0036] This application also discloses a method for preparing the aforementioned silicone oil release agent. The disclosed steps play a crucial role in the release performance of the silicone oil release machine provided in this application. Precise control of the stirring temperature, stirring time, addition interval, and addition sequence is essential.

[0037] If the stirring temperature or addition interval deviates from the scope disclosed in this application, or if the addition order is incorrect, side reactions may occur or the emulsifier may not dissolve completely, which may lead to problems such as phase separation, increased foam, increased emulsion droplets, or decreased demolding performance. Similarly, insufficient stirring time may hinder the full integration of surfactant and cosolvent, while excessively high stirring temperature may cause sensitive surfactant or cosolvent to degrade, producing byproducts that reduce emulsion stability and demolding efficiency.

[0038] This application also discloses a method for detecting the above-mentioned concentrated oil-dispersed silicone-based release agent and / or the silicone-based release agent prepared by the above-mentioned preparation method, which includes the following steps:

[0039] The release agent was diluted with water, stored, and observed. The diluted release agent was found to be evenly dispersed, anti-foaming, heat-resistant, and had stable release properties, indicating successful preparation.

[0040] In one specific implementation, the dilution ratio is 1:(20-100) of the release agent to water.

[0041] The storage temperature is 50-60℃, and the storage time is 12-17 days.

[0042] Specifically, uniform dispersion refers to a uniform and stable dispersion, which is mainly obtained by testing at dilution ratios. It is evaluated by observing whether there is stratification, sedimentation, and stability after standing or heating. If necessary, particle size or microscopic methods can also be used.

[0043] Antifoaming performance is mainly evaluated under stirring and actual use conditions, focusing primarily on foaming amount and defoaming speed.

[0044] Heat resistance is assessed by observing whether the system breaks down, delaminates, or degrades under heating or simulated die-casting conditions.

[0045] Compared with the prior art, this application has at least the following advantages:

[0046] 1. The silicone oil release agent disclosed in this application adopts OD (oil dispersion) technology, which can dilute high concentrations of release agent on site to form a stable emulsion, reduce transportation volume and storage space, and provide flexibility for different casting requirements;

[0047] 2. This application uses a variety of surfactants and co-solvents. Through the synergistic combination of lipophilic and hydrophilic surfactants and co-solvents, the release agent can be diluted to quickly form a stable, low-foaming water-in-oil emulsion, which directly overcomes the foaming and phase separation problems of pre-formed emulsions and achieves synergistic reduction of interfacial tension, low foaming and thermal stability.

[0048] 3. This application ensures the stability of the emulsion under various environmental conditions by adding functional additives (antifreeze, rust inhibitor, antibacterial agent), protects the mold from corrosion, and prevents microbial growth, thus solving common storage and performance problems of traditional emulsions and further improving the performance and storage stability of silicone oil release agent.

[0049] 4. Compared with traditional solvent-based release agents, the silicone oil release agent provided in this application is a concentrate that contains virtually no volatile organic compounds, reducing environmental pollution, improving workplace safety, providing flexibility and environmental benefits, and reducing the content of volatile organic compounds, transportation volume, and handling complexity.

[0050] 5. The water-in-oil emulsion of the release agent provided in this application remains stable at higher die casting temperatures and maintains consistent mold release across multiple casting cycles, thus solving the problems of instability and performance degradation of existing technologies under high-temperature conditions. Detailed Implementation

[0051] The technical solution of the present invention will be clearly and completely described below with reference to specific embodiments. However, those skilled in the art will understand that the embodiments described below are some embodiments of the present invention, but not all embodiments, and are only used to illustrate the present invention, and should not be regarded as limiting the scope of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0052] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "connected" should be interpreted broadly. For example, they can refer to fixed connection, detachable connection, or integral connection; they can refer to mechanical connection or electrical connection; they can refer to direct connection or indirect connection through an intermediate medium; and they can refer to the connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0054] To more clearly illustrate the technical solutions in this invention, specific embodiments are described below.

[0055] Example 1

[0056] This application provides a method for preparing a concentrated oil-dispersible silicone-based release agent, the method comprising the following steps:

[0057] 1. Weigh the raw material components by weight:

[0058] Weigh out 80 parts of silicone oil, 1.5 parts of sorbitol monooleate, 2 parts of fatty alcohol polyoxyethylene ether-3, 1.5 parts of octylphenol polyoxyethylene, 2 parts of polyoxyethylene sorbitan trioleate, 0.3 parts of polyethylene glycol, 0.8 parts of polypropylene glycol-7, 0.10 parts of antifreeze, 0.10 parts of rust inhibitor and 0.10 parts of antibacterial agent;

[0059] Among them, the antifreeze agent is propylene glycol, the rust inhibitor is an organic carboxylate rust inhibitor, and the antibacterial agent is isothiazolinone;

[0060] 2. Preparation of release agent:

[0061] a. First, inject silicone oil into a reaction vessel equipped with a mechanical stirrer, heat it continuously to 50°C at 101 kPa, and stir it evenly at 800 rpm for 30 minutes to ensure uniform oil phase temperature.

[0062] b. When the temperature reaches 50℃, add the following components to the reaction vessel in sequence at 8-minute intervals: sorbitol monooleate, fatty alcohol polyoxyethylene ether-3, octylphenol polyoxyethylene, polyoxyethylene sorbitan trioleate, polyethylene glycol, polypropylene glycol-7, antifreeze, corrosion inhibitor, and antibacterial agent. Keep stirring continuously throughout the process to ensure full dispersion.

[0063] c. After thorough dispersion, stir continuously at 800 rpm for 30 minutes at 50°C to ensure that sorbitol monooleate, fatty alcohol polyoxyethylene ether-3, octylphenol polyoxyethylene, polyoxyethylene sorbitan trioleate, polyethylene glycol and polypropylene glycol-7 are fully dissolved in silicone oil to form a concentrated solution.

[0064] d. Allow the well-mixed concentrate to cool naturally at 25°C while gently stirring continuously at 200 rpm to prevent oil phase separation and form a release agent.

[0065] Examples 2-6

[0066] The specific implementation method is the same as that in Example 1, except that the components in step 1 are different, as shown in Table 1:

[0067] Table 1 Different Components

[0068] Components silicone oil / part Sorbitol monooleate / part Fatty alcohol polyoxyethylene ether - 3 parts Octylphenol polyoxyethylene / part Polyoxyethylene sorbitan trioleate / part polyethylene glycol / part Polypropylene glycol - 7 parts Antifreeze / part Rust inhibitor / part Antibacterial agent / part Example 2 70 1 1 0.5 0.5 0.1 0.5 0.05 0.15 0.15 Example 3 88 2 3 2 4 0.5 1 0.15 0.25 0.25 Example 4 75 1.2 1.5 0.8 1 0.2 0.6 0.08 0.18 0.18 Example 5 85 1.8 2.5 1.8 3 0.4 0.9 0.13 0.22 0.22 Example 6 83 1.3 2.6 0.9 3.5 0.18 0.7 0.12 0.23 0.17

[0069] Examples 7-8

[0070] The specific implementation method is the same as in Example 1, except for the different preparation conditions, as shown in Table 2:

[0071] Table 2. Differences in preparation methods and conditions

[0072] Preparation method conditions Example 7 Example 8 Heating pressure in a / kPa 100 110 Heating temperature in a / °C 45 55 The stirring speed in a is / rpm 700 900 a. Time for uniform stirring (min) 25 40 The interval time in b / min 10 5 Stirring temperature in c / °C 55 45 Stirring speed in c / rpm 700 900 Stirring time in c / min 25 35 Natural cooling temperature in d / ℃ 30 20 The speed of gentle stirring in d is rpm. 100 300

[0073] Example 9

[0074] The specific implementation method is the same as in Example 1, except that the number of parts of silicone oil is 65 parts.

[0075] Comparative Example 1

[0076] The release agent provided in this comparative example is a commercially available emulsion-type die casting release agent.

[0077] Comparative Example 2

[0078] The specific implementation method is the same as in Example 1, except that the number of parts of silicone oil is 0.

[0079] Comparative Example 3

[0080] The specific implementation method is the same as in Example 1, except that the number of parts of silicone oil is 30 parts.

[0081] Comparative Example 4

[0082] The specific implementation method is the same as in Example 1, except that the number of parts of silicone oil is 100 parts.

[0083] Experimental Example 1

[0084] The release agents prepared in Examples 1-9 and Comparative Examples 1-2 were diluted with water at a ratio of 1:50 and stored at 54°C for 14 days. Key performance parameters were observed and recorded. The results are shown in Table 3.

[0085] Table 3 Record Results

[0086] Is the dispersion uniform? Anti-foaming properties Heat resistance Demolding performance Example 1 Uniform and stable dispersion Small amount of foam Highly heat resistant Excellent demolding performance Example 2 Uniform and stable dispersion Small amount of foam Highly heat resistant Excellent demolding performance Example 3 Uniform and stable dispersion Small amount of foam Highly heat resistant Excellent demolding performance Example 4 Uniform and stable dispersion Small amount of foam Highly heat resistant Excellent demolding performance Example 5 Uniform and stable dispersion Small amount of foam Highly heat resistant Excellent demolding performance Example 6 Uniform and stable dispersion Small amount of foam Highly heat resistant Excellent demolding performance Example 7 Uniform and stable dispersion Small amount of foam Highly heat resistant Excellent demolding performance Example 8 Uniform and stable dispersion Small amount of foam Highly heat resistant Excellent demolding performance Example 9 Uniform and stable dispersion Small amount of foam Highly heat resistant Excellent demolding performance Comparative Example 1 Uniform and stable dispersion Persistent Bubble Highly heat resistant Good demolding performance Comparative Example 2 Unstable No bubbles none Insufficient demolding performance Comparative Example 3 Uniform and stable dispersion Medium-sized bubbles Highly heat resistant Good demolding performance Comparative Example 4 Unstable No bubbles Highly heat resistant Good demolding performance

[0087] Experiment Example 2

[0088] The release agents prepared in Example 1 and Comparative Example 1 were diluted with water at a ratio of 1:40 and stored at 50°C for 17 days. Key performance parameters were observed and recorded, and the results are shown in Table 4.

[0089] Table 4 Record Results

[0090] Is the dispersion uniform? Anti-foaming properties Heat resistance Demolding performance Example 1 Uniform and stable dispersion Small amount of foam Highly heat resistant Excellent demolding performance Comparative Example 1 Uniform and stable dispersion Persistent Bubble Highly heat resistant Good demolding performance

[0091] Example 3

[0092] The release agents prepared in Example 1 and Comparative Example 1 were diluted with water at a ratio of 1:100 and stored at 60°C for 12 days. Key performance parameters were observed and recorded, and the results are shown in Table 5.

[0093] Table 5 Record Results

[0094] Is the dispersion uniform? Anti-foaming properties Heat resistance Demolding performance Example 1 Uniform and stable dispersion Small amount of foam Highly heat resistant Excellent demolding performance Comparative Example 1 Unstable Persistent Bubble Highly heat resistant Good demolding performance

[0095] Experiment Example 4

[0096] The release agents prepared in Example 1 and Comparative Example 1 were diluted with water at a ratio of 1:200 and stored at 54°C for 14 days. Key performance parameters were observed and recorded, and the results are shown in Table 6.

[0097] Table 6 Record Results

[0098] Is the dispersion uniform? Anti-foaming properties Heat resistance Demolding performance Example 1 Uniform and stable dispersion Small amount of foam Highly heat resistant Good demolding performance Comparative Example 1 Uniform and stable dispersion Persistent Bubble Highly heat resistant Poor demolding performance

[0099] Experimental Example 5

[0100] The release agents prepared in Example 1 and Comparative Example 1 were diluted with water at a ratio of 1:50 and stored at 54°C for 90 days. Key performance parameters were observed and recorded, and the results are shown in Table 7.

[0101] Table 7 Record Results

[0102] Is the dispersion uniform? Anti-foaming properties Heat resistance Demolding performance Example 1 Unstable Small amount of foam Highly heat resistant Good demolding performance Comparative Example 1 Unstable Persistent Bubble Highly heat resistant Poor demolding performance

[0103] Based on the data from Experimental Examples 1-7 above, it can be seen from the data in Table 3 that the release agents prepared in Comparative Examples 1-4 are generally less effective than those in Examples 1-7.

[0104] Meanwhile, in Experiments 2–5, it was also demonstrated that the release agent provided in this application can exhibit good release effect within the disclosed scope, and its performance is comparable to or better than that of conventional emulsion-type release agents available on the market, proving that the present invention has stable practicality and comparability under various conditions.

[0105] Meanwhile, according to the data from Experimental Examples 2-5, under the same conditions, the effect of the release agent disclosed in this application is significantly better than that of the release agent provided in Comparative Example 1. This is because the stable conditions during preparation in this application can avoid degradation of sensitive surfactants and co-solvents, thus ensuring the stability of the emulsion. At the same time, the hydrophilic surfactants and co-solvents used in this application can ensure that the release agent quickly forms a low-foaming, thermally stable water-in-oil emulsion after dilution. The balance between silicone oil and hydrophilic surfactants and co-solvents greatly improves the effect of the release agent, which cannot be achieved in Comparative Example 1.

[0106] Furthermore, as can be seen from the results of Experiments 4 and 5, when the dilution ratio exceeds the effective range, the effective concentration of the active component in the release agent decreases, and the interfacial coverage and functional effects weaken accordingly, resulting in a decline in overall performance. Similarly, after the storage time exceeds the protection range, some active components in the system may degrade or aggregate, reducing stability and thus affecting the final effect. Despite the above-mentioned adverse factors, Example 1 still maintains superior performance compared to the comparative example under high dilution and long-term storage conditions, further demonstrating the advantages and stability of this application.

[0107] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. This application is not limited to the exact structures described above, and it cannot be considered that the specific implementation of this application is limited to these descriptions. For those skilled in the art to which this application pertains, various changes and modifications made without departing from the concept of this application should be considered to fall within the protection scope of this application.

Claims

1. A concentrated oil-dispersible silicone-based release agent, characterized in that, Includes the following components, by weight: 60-88 parts silicone oil, 1-2 parts sorbitol monooleate, 1-3 parts fatty alcohol polyoxyethylene ether-3, 0.5-2 parts octylphenol polyoxyethylene, 0.5-4 parts polyoxyethylene sorbitan trioleate, 0.1-0.5 parts polyethylene glycol, 0.5-1 parts polypropylene glycol-7, 0.05-0.15 parts antifreeze, 0.15-0.25 parts rust inhibitor, and 0.15-0.25 parts antibacterial agent.

2. The silicone-based release agent according to claim 1, characterized in that, Includes the following components, by weight: 75-85 parts silicone oil, 1.2-1.8 parts sorbitol monooleate, 1.5-2.5 parts fatty alcohol polyoxyethylene ether-3, 0.8-1.8 parts octylphenol polyoxyethylene, 1-3 parts polyoxyethylene sorbitan trioleate, 0.2-0.4 parts polyethylene glycol, 0.6-0.9 parts polypropylene glycol-7, 0.08-0.13 parts antifreeze, 0.18-0.22 parts rust inhibitor, and 0.18-0.22 parts antibacterial agent.

3. The silicone-based release agent according to claim 1, characterized in that, Includes the following components, by weight: 80 parts silicone oil, 1.5 parts sorbitol monooleate, 2 parts fatty alcohol polyoxyethylene ether-3, 1.5 parts octylphenol polyoxyethylene, 2 parts polyoxyethylene sorbitan trioleate, 0.3 parts polyethylene glycol, 0.8 parts polypropylene glycol-7, 0.10 parts antifreeze, 0.10 parts rust inhibitor and 0.10 parts antibacterial agent.

4. The method for preparing the concentrated oil-dispersible silicone-based release agent according to any one of claims 1-3, characterized in that, Includes the following steps: Stir and heat the silicone oil; Sorbitol monooleate, fatty alcohol polyoxyethylene ether-3, octylphenol polyoxyethylene, polyoxyethylene sorbitan trioleate, polyethylene glycol, polypropylene glycol-7, antifreeze, corrosion inhibitor and antibacterial agent are added in sequence. After mixing thoroughly, stir to form a concentrated solution; The concentrate was allowed to cool naturally.

5. The preparation method according to claim 4, characterized in that, The heating process includes the following steps: Continue heating at 100-110 kPa to 45-55℃ while stirring; The stirring speed is 700-900 rpm, and the stirring time is 25-40 min.

6. The preparation method according to claim 4, characterized in that, The sequential addition of sorbitol monooleate, fatty alcohol polyoxyethylene ether-3, octylphenol polyoxyethylene, polyoxyethylene sorbitan trioleate, polyethylene glycol, polypropylene glycol-7, antifreeze, corrosion inhibitor, and antibacterial agent includes the following steps: Add sorbitol monooleate, fatty alcohol polyoxyethylene ether-3, octylphenol polyoxyethylene, polyoxyethylene sorbitan trioleate, polyethylene glycol, polypropylene glycol-7, antifreeze, corrosion inhibitor, and antibacterial agent sequentially every 5-10 minutes.

7. The preparation method according to claim 4, characterized in that, The temperature during stirring after the mixture is homogeneous is 45-55℃, the time is 25-35 minutes, and the stirring speed is 700-900 rpm.

8. The preparation method according to claim 4, characterized in that, The natural cooling process includes the following steps: The concentrate is cooled naturally at 20-30℃ while being gently stirred continuously to form a release agent; The gentle stirring speed is 100-300 rpm.

9. A method for detecting the concentrated oil-dispersible silicone-based release agent according to any one of claims 1-3 and / or the silicone-based release agent prepared by the preparation method according to any one of claims 4-8, characterized in that, Includes the following steps: The release agent was diluted with water, stored, and observed. The diluted release agent was found to be evenly dispersed, anti-foaming, heat-resistant, and had stable release properties, indicating successful preparation.

10. The detection method according to claim 9, characterized in that, The dilution ratio is 1:(20-100) of the release agent to water. The storage temperature is 50-60℃, and the storage time is 12-17 days.