A stamping oil for aluminum products and its preparation method and application

Abstract

The present invention relates to a stamping oil for aluminum products and a preparation method and application thereof. The constituent raw materials of the stamping oil for aluminum products include: 45-80 parts by weight of mineral oil, 10-50 parts by weight of synthetic ester, 0.1-0.5 parts by weight of antioxidant, 0.1-0.5 parts by weight of rust inhibitor, 0.2-0.5 parts by weight of extreme pressure anti-wear agent, and 2-5 parts by weight of viscosity improver. The stamping oil for aluminum products provided by the present invention has good lubricity, can effectively avoid the problem of breakage caused by excessive deformation of aluminum foil during production and processing, has excellent cleaning performance, rust and corrosion resistance, does not contain irritating odor components, and has a safe and environmentally friendly production environment.

Description

Technical Field

[0001] The invention relates to the technical field of stamping oil, and in particular to stamping oil for aluminum products and a preparation method and application thereof. Background Art

[0002] Aluminum products have the characteristics of light weight, good thermal conductivity and excellent ductility, and can be used as packaging materials, especially food packaging materials. Aluminum packaging materials are usually processed and produced by stamping. During the stamping process, excellent stamping oil is indispensable. Stamping oil can significantly reduce the friction between the mold and the aluminum plate and prevent aluminum powder from adhering to the finished product. In addition, during the continuous production process, the friction between the mold and the material generates a lot of heat. Stamping oil can play a cooling role, protect the mold and increase the working life of the mold. When stamping thicker aluminum products, such as wrinkle-free aluminum boxes, the material has greater ductility and deformation, and the stamping pressure may reach more than 40 tons. Stamping oil with appropriate viscosity is required to meet the process requirements.

[0003] In addition, stamping processing also has strict requirements on the cleanliness of stamping oil, especially when making aluminum food packaging boxes and cans. Poor cleanliness will cause lubricating oil and aluminum powder to come into direct contact with the human body, leading to the accumulation of harmful substances in the body, causing lesions in the nervous system, and increasing the incidence of Alzheimer's disease. Therefore, it is of great significance to research and develop stamping oils for aluminum products with good lubricity and no need for cleaning. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a stamping oil for aluminum products and a preparation method and application thereof. The stamping oil provided by the present invention has the advantages of excellent lubricity, cleaning properties, rust and corrosion resistance, and no odor.

[0005] In a first aspect, the present invention provides a stamping oil for aluminum products, wherein the constituent raw materials of the stamping oil for aluminum products include, by weight:

[0006]

[0007]

[0008] The sum of the weight parts of the constituent raw materials is 100 weight parts. If the weight parts of the components are not within this range, the same technical effect as the present invention cannot be obtained.

[0009] The mineral oil can be 50 parts by weight, 55 parts by weight, 60 parts by weight, 65 parts by weight, 70 parts by weight, 75 parts by weight, etc.

[0010] The synthetic ester may be 20 parts by weight, 25 parts by weight, 30 parts by weight, 35 parts by weight, 40 parts by weight, 45 parts by weight, etc.

[0011] The antioxidant can be 0.2 parts by weight, 0.3 parts by weight, 0.4 parts by weight, etc.

[0012] The rust inhibitor can be 0.2 parts by weight, 0.3 parts by weight, 0.4 parts by weight, etc.

[0013] The extreme pressure anti-wear agent can be 0.3 parts by weight, 0.4 parts by weight, etc.

[0014] The viscosity improver can be 2.5 parts by weight, 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight, etc.

[0015] The stamping oil for aluminum products provided by the present invention uses a viscosity improver, mineral oil and a multifunctional additive to form a stable solution in a certain proportion. While increasing the viscosity, a dense oil film is formed on the metal surface, so that it has good lubricity and can effectively avoid the problem of breakage caused by excessive deformation of the aluminum foil during production and processing. At the same time, the use amount of sulfur-phosphorus extreme pressure anti-wear agents is greatly reduced, the surface quality of aluminum products is improved, the residual oil is less and the oil odor is reduced. On the other hand, it can effectively protect equipment and molds, extend the service life, reduce maintenance costs, and improve corporate benefits. In addition, the stamping oil for aluminum products provided by the present invention has excellent cleaning performance, fast oil removal, no need for cleaning, and good rust and corrosion resistance. During the production and storage process, it can effectively avoid the corrosion of aluminum product packaging boxes and extend the shelf life. It does not contain irritating odor components, and the production environment is safe and environmentally friendly.

[0016] As a preferred technical solution of the present invention, the raw materials of the stamping oil for aluminum products include, by weight:

[0017]

[0018] As a preferred technical solution of the present invention, the mass ratio of the viscosity improver to the total mass of the mineral oil and the synthetic ester is 1:20-50, for example, 1:25, 1:30, 1:35, 1:40, 1:45, etc., preferably 1:32-49.

[0019] The viscosity improver provided by the present invention can improve the viscosity of stamping oil for aluminum products within a relatively low dosage range, so that a dense oil film is formed on the surface of the aluminum products, which has good lubricity and cleaning properties.

[0020] As a preferred technical solution of the present invention, the viscosity improver is selected from any one or a combination of two or more of PIB450, PIB680, T631 or polyisobutylene derivatives, preferably any one or a combination of two or more of polyisobutylene derivatives.

[0021] The polyisobutylene derivative provided by the present invention has good shear stability, suitable oxidation stability and good high-temperature detergency, the main chain of the molecule does not contain double bonds, and no long side chains exist, and can be firmly adsorbed on the aluminum surface to form a dense oil film to reduce the friction coefficient, play an excellent lubricating role, and will not have an adverse effect on the volatility of mineral oil.

[0022] As a preferred technical solution of the present invention, the preparation method of the polyisobutylene derivative comprises the following steps:

[0023] (1) mixing a phenol derivative having at least two substituents with sodium hydroxide for reaction, filtering with suction, and drying to obtain a white solid powder, wherein one of the substituents of the phenol derivative having at least two substituents is methyl propionate;

[0024] (2) mixing epoxidized polyisobutylene, the white solid powder and a solvent to react, and extracting to obtain the polyisobutylene derivative.

[0025] As a preferred technical solution of the present invention, the other substituent of the phenol derivative containing at least two substituents in step (1) is a C1-C4 alkyl group.

[0026] The C1-C4 alkyl group may be methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, or the like.

[0027] As a preferred technical solution of the present invention, the preparation method of the polyisobutylene derivative comprises the following steps:

[0028] (1) dissolving a phenol derivative having at least two substituents in alcohol, mixing with sodium hydroxide under N2 protection to react, adjusting the pH to about 3, filtering, adjusting the pH to about 7, and vacuum drying to obtain a white solid powder, wherein one of the substituents of the phenol derivative having at least two substituents is methyl propionate;

[0029] (2) The epoxidized polyisobutylene, the white solid powder and the xylene solvent are mixed and reacted, and the polyisobutylene derivative is obtained by extraction by reduced pressure distillation.

[0030] As a preferred technical solution of the present invention, the preparation method of the polyisobutylene derivative comprises the following steps:

[0031] (1) dissolving a phenol derivative having at least two substituents in alcohol, mixing with sodium hydroxide at 60-80° C. under N2 protection to react for 4-6 hours, adjusting the pH value to about 3 with hydrochloric acid, filtering, adjusting the pH value to about 7, and vacuum drying at 40° C. to obtain a white solid powder, wherein one of the substituents of the phenol derivative having at least two substituents is methyl propionate;

[0032] (2) Mixing the epoxidized polyisobutylene, the white solid powder and the xylene solvent, heating to 150° C. for reaction for 10-15 hours, and extracting by vacuum distillation to obtain the polyisobutylene derivative.

[0033] As a specific embodiment of the present invention, the preparation method of the polyisobutylene derivative comprises the following steps:

[0034] (1) Place methyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate in a dry three-necked flask, add alcohol to dissolve, then place in a 70°C constant temperature water bath and start stirring. Pass N2 for protection for 20 minutes, then slowly add 30% sodium hydroxide solution using a constant pressure dropping funnel, and continue the reaction for 5 hours under nitrogen protection.

[0035] The reaction was stopped, cooled to room temperature, and the pH value was adjusted to about 3 with hydrochloric acid at a ratio of 1:1 under stirring, and the mixture was continuously stirred. After 1 hour, the mixture was filtered and the pH value was adjusted to about 7. The obtained solid was dried under vacuum at 40°C for 24 hours to obtain a white solid powder.

[0036] (2) Add epoxidized polyisobutylene and the above white solid powder into a three-necked flask, add a certain amount of xylene, slowly raise the temperature to 150° C. while stirring, and react for 10 hours. Extract by vacuum distillation to obtain the polyisobutylene derivative.

[0037] As a preferred technical solution of the present invention, the synthetic ester is selected from any one of polyricinoleate, neopentyl glycol oleate or pentaerythritol oleate or a combination of two or more thereof, preferably polyricinoleate.

[0038] The polyricinoleic acid ester of the present invention can be any one of dimer ricinoleic acid ester, tetramer ricinoleic acid ester, hexamer ricinoleic acid ester, or a combination of two or more thereof.

[0039] The polyricinoleic acid ester provided by the present invention has good compatibility with mineral oil, strong shear resistance, can form a uniform and dense oil film, and can provide a higher viscosity for the stamping oil. Therefore, the amount of the viscosity improver in the present invention can be within a relatively low range.

[0040] As a preferred technical solution of the present invention, the mineral oil is selected from any one of D40, D60, D80 or 60N or a combination of two or more thereof.

[0041] The mineral oil provided by the invention is refined mineral oil, has a narrow distillation range, does not contain aromatic hydrocarbons and sulfur elements, is odorless, and has good volatility and cleaning-free properties.

[0042] As a preferred technical solution of the present invention, the antioxidant is selected from T501 and / or C4703.

[0043] The antioxidant provided by the present invention has high activity, can act quickly on the surface of the aluminum plate, and has good antioxidant effect.

[0044] As a preferred technical solution of the present invention, the rust inhibitor is selected from any one of T747, OMD, and a benzotriazole derivative or a combination of two or more thereof, and the benzotriazole derivative is preferably methylbenzotriazole.

[0045] As a preferred technical solution of the present invention, the extreme pressure anti-wear agent is selected from sulfur extreme pressure anti-wear agents and / or phosphorus extreme pressure anti-wear agents.

[0046] As a preferred technical solution of the present invention, the sulfur-based extreme pressure anti-wear agent is selected from any one of sulfurized olefins and sulfurized fats or a combination of two or more thereof. The sulfurized olefin is preferably RC2540, and the sulfurized fat is preferably SR6311.

[0047] As a preferred technical solution of the present invention, the phosphorus-based extreme pressure anti-wear agent is selected from any one or a combination of two or more of phosphorus salts or phosphites. The phosphorus salt is preferably V692, and the phosphite is preferably DOVERPHOS 253.

[0048] The present invention can improve the surface quality of aluminum products when the usage amount of sulfur / phosphorus extreme pressure anti-wear agent is relatively low.

[0049] In a second aspect, the present invention provides a method for preparing the stamping oil for aluminum products described in the first aspect, comprising: mixing mineral oil, synthetic ester, and viscosity improver evenly, adding antioxidant, rust inhibitor, extreme pressure anti-wear agent, stirring evenly, and obtaining the stamping oil for aluminum products.

[0050] As a preferred technical solution of the present invention, the stirring temperature is 45-55°C, and the stirring time is 30-50min.

[0051] The stirring temperature can be 48°C, 50°C, 52°C, 54°C, etc., and the stirring time can be 35 min, 40 min, 45 min, etc.

[0052] In a third aspect, the present invention provides the use of the stamping oil for aluminum products described in the first aspect in the processing and forming of aluminum products.

[0053] The technical solution provided by the embodiment of the present invention has the following advantages compared with the prior art:

[0054] 1. The stamping oil for aluminum products provided by the present invention has excellent lubricity and can effectively avoid the problem of breakage caused by excessive deformation of the aluminum foil during the production and processing process.

[0055] 2. The stamping oil for aluminum products provided by the present invention has excellent cleaning performance, fast oil removal and small residue.

[0056] 3. The stamping oil for aluminum products provided by the present invention has good anti-rust and anti-corrosion properties. During the production and storage process, it can effectively prevent the corrosion of the aluminum product packaging box and extend the shelf life.

[0057] 4. The stamping oil for aluminum products provided by the present invention does not contain any pungent odor components, and the production environment is safe and environmentally friendly.

[0058] 5. The stamping oil for aluminum products provided by the present invention can effectively protect equipment and molds, extend service life, reduce maintenance costs, and improve enterprise benefits. DETAILED DESCRIPTION

[0059] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0060] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0061] The sources of the chemical reagents used in the present invention are as follows:

[0062] Rust inhibitor OMD: Nanjing Shangqin New Material Technology Co., Ltd.

[0063] Sulfurized olefin RC2540: Rhein Chemie

[0064] Sulfurized fat SR6311: Xirui Specialty Chemical Co., Ltd.

[0065] Phosphate V692: Vanderbilt Chemical LLC

[0066] Phosphite DOVERPHOS 253: Preparation Example 1 from DOVER CHEMICAL, USA

[0067] This preparation example provides a polyisobutylene derivative and a preparation method thereof, and the preparation method is as follows:

[0068] Place 58.4 g of methyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate in a dry three-necked flask, add alcohol to dissolve, and then place in a 70°C constant temperature water bath with stirring. Pass N2 for protection for 20 min, then slowly add 64 g of 30% sodium hydroxide solution using a constant pressure dropping funnel, and continue the reaction for 5 h under N2 protection.

[0069] Stop the reaction, cool to room temperature, adjust the pH to about 3 with hydrochloric acid at a ratio of 1:1 under stirring, continue stirring for 1 hour, then filter and adjust the pH to about 7 to make a neutral solution, and dry the obtained solid at 40°C under vacuum for 24 hours to obtain a white powder.

[0070] 130 g of epoxidized polyisobutylene and the white powder were added to a three-necked flask, and 500 mL of xylene was added. The temperature was slowly raised to 150° C. while stirring, and the reaction was carried out for 10 hours. The polyisobutylene derivative was obtained by vacuum distillation and extraction.

[0071] Preparation Example 2

[0072] This preparation example provides a polyisobutylene derivative and a preparation method thereof, which is different from Preparation Example 1 in that the 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid methyl ester is replaced by 3-(3,5-methyl-4-hydroxyphenyl)propionic acid methyl ester.

[0073] Preparation Example 3

[0074] This preparation example provides a polyisobutenyl derivative and a preparation method thereof, which is different from Preparation Example 1 in that the 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid methyl ester is replaced by 3-(3,5-isopropyl-4-hydroxyphenyl)propionic acid methyl ester.

[0075] Example 1

[0076] This embodiment provides a stamping oil for aluminum products and a preparation method thereof, and the preparation method is as follows:

[0077] (1) Add refined mineral oil, synthetic ester and viscosity improver to a reaction kettle equipped with a stirrer and a thermometer, stir and heat to 45°C, and continue stirring until the solution is clear and stable;

[0078] (2) adding a rust inhibitor, an antioxidant and an extreme pressure anti-wear agent, continuing to stir for 30 minutes until the solution is uniform, and cooling to room temperature to obtain the stamping oil for aluminum products.

[0079] The refined mineral oil is D40, the synthetic ester is polyricinoleate, the viscosity improver is the polyisobutylene derivative prepared in Preparation Example 1, the rust inhibitor is T747, the antioxidant is T501, and the extreme pressure anti-wear agent is V692;

[0080] The weight parts of the various constituent materials are:

[0081]

[0082] Example 2

[0083] This embodiment provides a stamping oil for aluminum products and a preparation method thereof, which is different from Embodiment 1 in that:

[0084] The refined mineral oil is D60, the synthetic ester is neopentyl glycol oleate, the viscosity improver is the polyisobutylene derivative prepared in Preparation Example 2, the rust inhibitor is OMD, the antioxidant is C4703, and the extreme pressure antiwear agent is RC2540;

[0085] The weight parts of the various constituent materials are:

[0086]

[0087]

[0088] Example 3

[0089] This embodiment provides a stamping oil for aluminum products and a preparation method thereof, which is different from Embodiment 1 in that:

[0090] The refined mineral oil is D80, the synthetic ester is pentaerythritol oleate, the viscosity improver is the polyisobutylene derivative prepared in Preparation Example 3, the rust inhibitor is methylbenzotriazole, and the extreme pressure antiwear agent is SR6311;

[0091] The weight parts of the various constituent materials are:

[0092]

[0093] Example 4

[0094] This embodiment provides a stamping oil for aluminum products and a preparation method thereof, which is different from Embodiment 1 in that the viscosity improver is polyisobutylene.

[0095] Example 5

[0096] This embodiment provides a stamping oil for aluminum products and a preparation method thereof, which is different from Embodiment 1 in that:

[0097] The dosage of synthetic ester and viscosity improver is:

[0098] 49 parts by weight of synthetic ester;

[0099] 4 parts by weight of viscosity improver.

[0100] Example 6

[0101] This embodiment provides a stamping oil for aluminum products and a preparation method thereof, which is different from Embodiment 1 in that:

[0102] The dosage of mineral oil and viscosity improver is:

[0103] 46.6 parts by weight of mineral oil;

[0104] 2.4 parts by weight of viscosity improver.

[0105] Comparative Example 1

[0106] This comparative example provides a stamping oil for aluminum products and a preparation method thereof, which is different from Example 1 in that:

[0107] The dosage of mineral oil and viscosity improver is:

[0108] 48 parts by weight of mineral oil;

[0109] 1 part by weight of viscosity improver.

[0110] Comparative Example 2

[0111] This comparative example provides a stamping oil for aluminum products and a preparation method thereof, which is different from Example 1 in that:

[0112] The dosage of mineral oil and viscosity improver is:

[0113] 41 parts by weight of mineral oil;

[0114] 8 parts by weight of viscosity improver.

[0115] Comparative Example 3

[0116] This comparative example provides a stamping oil for aluminum products and a preparation method thereof, which is different from Example 1 in that:

[0117] The dosage of mineral oil and synthetic ester is:

[0118] 76 parts by weight of mineral oil;

[0119] 20 parts by weight of synthetic ester;

[0120] Comparative Example 4

[0121] This comparative example provides a stamping oil for aluminum products and a preparation method thereof, which is different from Example 1 in that:

[0122] The weight parts of the various constituent materials are:

[0123]

[0124] Performance Test 1

[0125] The aluminum products obtained in Examples 1-6 and Comparative Examples 1-4 were subjected to lubrication tests using stamping oil. The lubrication tests were conducted in accordance with GB / T 12583. B and P D Test, P B is the maximum no-seizure load value, representing the strength of the oil film, P B The larger the value, the better the oil film carrying capacity; D is the sintering load value, representing the extreme pressure lubricity of the oil, P D The larger the value, the better the extreme pressure lubricity of the oil. The test results are shown in Table 1.

[0126] Performance Test 2

[0127] The aluminum products obtained in Examples 1-6 and Comparative Examples 1-4 were tested for surface residue using stamping oil. The surface residue test was conducted by weight method. The aluminum product was placed for 24 hours after stamping and the mass m1 was weighed. The mass m2 was weighed after cleaning and drying with petroleum ether (60-90°C). The surface residue was (m1-m2) / m1. The surface residue reached traces (<300PPM), meeting the industry's requirement for no-cleaning. The test results are shown in Table 1.

[0128] The lubricity and surface residue of the stamping oil for aluminum products obtained in Examples 1-6 and Comparative Examples 1-4 are shown in Table 1:

[0129] Table 1

[0130]

[0131]

[0132] As shown in Table 1, the stamping oil for aluminum products prepared by the present invention has excellent lubricity and cleaning performance. In Examples 1, 2, 5, and 6, the mass ratio of the viscosity improver polyisobutylene derivative to the total mass of the mineral oil and the synthetic ester is in the range of 1:20-50, and excellent lubricity (P B , P D The value is high), and the surface residue of the aluminum product after stamping is small. In Example 3, the mass ratio of the viscosity modifier polyisobutylene derivative to the total mass of mineral oil and synthetic ester is 1:18.7. The increase in the amount of the viscosity modifier polyisobutylene derivative is beneficial to improving lubricity, but it has an adverse effect on the surface residue of the aluminum product. In Example 4, polyisobutylene is used to replace the polyisobutylene derivative. Although a relatively excellent surface residue of the aluminum product can be obtained, the poor anti-shear effect of polyisobutylene is not conducive to lubrication (P B In Comparative Example 1, when the amount of viscosity improver is too small, it cannot provide effective viscosity increase and anti-shear effect, resulting in poor lubrication (P B , P DThe value is low), and a large amount of aluminum powder is generated on the surface of the aluminum product, resulting in a significant increase in the surface residue. In Comparative Example 2, when the amount of viscosity improver is too much, the viscosity of the stamping oil increases significantly, although excellent lubricity (P B , P D The viscosity improver cannot be effectively volatilized, resulting in a large amount of residue on the surface of the aluminum product. In Comparative Example 3, the lubrication is poor (P B , P D The value is low), aluminum powder is generated on the surface of the aluminum product, resulting in an increase in the surface residue. In Comparative Example 4, the surface residue of the aluminum product is extremely large.

[0133] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0134] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A stamping oil for aluminum products, characterized in that: In parts by weight, the constituent raw materials of the stamping oil for aluminum products are: 45-80 parts by weight of mineral oil; 10-50 parts by weight of synthetic ester; Antioxidant 0.1-0.5 parts by weight; Rust inhibitor 0.1-0.5 parts by weight; 0.2-0.5 parts by weight of extreme pressure antiwear agent; 2-5 parts by weight of viscosity improver; The mass ratio of the viscosity improver to the total mass of the mineral oil and the synthetic ester is 1:20-50; The viscosity improver is selected from any one or a combination of two or more of polyisobutylene derivatives; The preparation method of the polyisobutene derivative comprises the following steps: (1) mixing a phenol derivative having at least two substituents with sodium hydroxide for reaction, filtering with suction, and drying to obtain a white solid powder, wherein one of the substituents of the phenol derivative having at least two substituents is methyl propionate; (2) mixing epoxidized polyisobutylene, the white solid powder and a solvent to react and extracting to obtain the polyisobutylene derivative; The mineral oil is selected from any one of D40, D60, D80 or 60N or a combination of two or more thereof.

2. The stamping oil for aluminum products according to claim 1, characterized in that: In parts by weight, the constituent raw materials of the stamping oil for aluminum products are: Mineral oil 46-67.6 parts by weight; 30-50 parts by weight of synthetic ester; Antioxidant 0.1-0.3 parts by weight; Rust inhibitor 0.1-0.3 parts by weight; 0.2-0.4 parts by weight of extreme pressure antiwear agent; 2-3 parts by weight of viscosity improver.

3. The stamping oil for aluminum products according to claim 1 or 2, characterized in that: The mass ratio of the viscosity improver to the total mass of the mineral oil and the synthetic ester is 1:32-49.

4. The stamping oil for aluminum products according to claim 1, characterized in that: In step (1), the other substituent of the phenol derivative containing at least two substituents is a C1-C4 alkyl group.

5. The stamping oil for aluminum products according to claim 1 or 2, characterized in that: The synthetic ester is selected from any one or a combination of two or more of polyricinoleate, neopentyl glycol oleate or pentaerythritol oleate.

6. The stamping oil for aluminum products according to claim 5, characterized in that: The synthetic ester is selected from any one or a combination of two or more polyricinoleic acid esters.

7. The stamping oil for aluminum products according to claim 1 or 2, characterized in that: The antioxidant is selected from T501 and / or C4703; And / or, the rust inhibitor is selected from any one or a combination of two or more of T747, OMD, and benzotriazole derivatives; And / or, the extreme pressure anti-wear agent is selected from sulfur extreme pressure anti-wear agents and / or phosphorus extreme pressure anti-wear agents.

8. The method for preparing stamping oil for aluminum products according to any one of claims 1 to 7, characterized in that: The preparation method comprises: mixing mineral oil, synthetic ester and viscosity improver evenly, adding antioxidant, rust inhibitor and extreme pressure anti-wear agent, stirring evenly, and obtaining the stamping oil for aluminum products.

9. The preparation method according to claim 8, characterized in that: The stirring temperature is 45-55° C., and the stirring time is 30-50 min.

10. Use of the stamping oil for aluminum products according to any one of claims 1 to 7 in the processing and forming of aluminum products.

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