Water-soluble heavy-load forming oil and preparation method thereof

Abstract

The invention discloses water-soluble heavy-load forming oil and a preparation method, and belongs to the technical field of lubricating oil, the water-soluble heavy-load forming oil comprises the following components by weight: 37-48% of an oiliness agent, 21-23% of an extreme pressure agent, 16-18% of a surfactant, 6-8% of an antirust agent, 4-6% of phosphorous acid, 2-3% of an antioxidant, 2-3% of a metal deactivator, and 1-2% of a viscosity index improver. The water-soluble heavy-load forming oil provided by the invention has good extreme pressure lubricity, is suitable for heavy-load one-time forming processing, and has the advantages of emulsibility, easiness in cleaning, good rust resistance and corrosion inhibition and long storage life. The preparation method of the water-soluble heavy-load forming oil is simple and efficient, equipment used in the preparation method is easy to arrange, and the water-soluble heavy-load forming oil can be widely popularized in the forming processing industry.

Description

Technical Field

[0001] The invention relates to the technical field of lubricating oils, and in particular to a water-soluble heavy-load forming oil and a preparation method thereof. Background Art

[0002] One-shot molding is an important process for preparing parts. One-shot molding is increasingly widely used in many fields such as automobiles and large equipment manufacturing. Compared with multiple molding processes, in which the workpiece is deformed one by one according to the set steps, the workpiece directly deformed by the one-shot molding process has the advantages of continuous internal crystal structure without damage, high hardness and strength, uniform surface and good consistency.

[0003] During the forming process of the workpiece, the large-scale deformation of the workpiece will release a lot of heat, and the uneven microstructure will cause damage to the workpiece and the mold. In order to make the one-time forming process go smoothly, it is necessary to use appropriate forming oil as the medium. The lubrication and cooling of the forming oil ensure that the material is uniform and undamaged during the deformation process.

[0004] For the molding process of large-scale workpieces, the molding oil needs to have extremely strong lubricating properties to ensure that a continuous and sufficiently strong lubricating film can be formed to prevent the surface of the mold and the workpiece from being damaged and structural damage. In addition, the molding oil needs to not corrode the mold and the workpiece, and be easy to clean without residue, and will not affect the use or subsequent processing procedures. However, in the prior art, the proposed molding oil still has insufficient lubrication performance under heavy loads (for example, in the prior art Chinese invention patent CN108659931A, the sintering load of the molding oil is 800Kg), and the lubrication performance of the molding oil with water solubility and easy-to-clean characteristics is even lower. Therefore, it is necessary to develop a high-load one-time molding oil that is sufficiently water-soluble to ensure the smooth progress of the more difficult one-time molding process.

[0005] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0006] The purpose of the present invention is to provide a water-soluble heavy-load forming oil and a preparation method, aiming to solve the problem that the existing forming oil has insufficient lubrication performance under heavy loads and the lubrication performance of the forming oil cannot be taken into account together with its water solubility and easy-to-clean properties.

[0007] To achieve the above object, the solution provided by the present invention is:

[0008] A water-soluble heavy-duty forming oil, calculated by mass percentage, comprises the following components:

[0009] Oiliness agent 37-48%, extreme pressure agent 21-23%, surfactant 16-18%, rust inhibitor 6-8%, phosphorous acid 4-6%, antioxidant 2-3%, metal deactivator 2-3%, viscosity index improver 1-2%;

[0010] The oiliness agent includes at least one of fatty acid octyl ester, fatty acid isooctyl ester, oxidized fatty acid octyl ester, fatty acid methyl ester, tall oil, tall oil fatty acid, oleic acid, ricinoleic acid, coconut oleic acid, pentaerythritol oleate, cottonseed oil, tetrapolyricinoleic acid ester, trimethylolpropane oleate, and neodecanoic acid.

[0011] The oiliness agent includes tetrapolyricinoleic acid ester, oxidized fatty acid octyl ester and tall oil fatty acid.

[0012] The extreme pressure agent includes a sulfur-based extreme pressure agent, an oil-soluble phosphorus-based extreme pressure agent and a water-soluble phosphorus-based extreme pressure agent.

[0013] The sulfur-based extreme pressure agent includes at least one of sulfurized animal oil, sulfurized fatty acid ester, dibutyl sulfide, dioctyl disulfide, diphenyl sulfide, benzyl sulfide, isobutylene sulfide, propylene sulfide, and cyclohexene sulfide;

[0014] The oil-soluble phosphorus-based extreme pressure agent includes at least one of trimethyl phosphate, triethyl phosphate, tributyl phosphate, triphenyl phosphate, trihexyl phosphate, isooctyl phosphate, castor oil phosphate, lauryl alcohol phosphate, oleyl alcohol phosphate, and trioleyl alcohol phosphate;

[0015] The water-soluble phosphorus-based extreme pressure agent includes at least one of oleyl alcohol polyoxyethylene ether phosphate, lauryl alcohol polyoxyethylene ether phosphate, isomeric tridecanol polyoxyethylene ether phosphate, and isooctyl alcohol polyoxyethylene ether phosphate.

[0016] The surfactant includes at least one of lauramide propylamine oxide, tallow amine polyoxyethylene ether, oleylamine polyoxyethylene ether, dodecylamine polyoxyethylene ether, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, oleyl alcohol polyoxyethylene ether, oleic acid polyoxyethylene ether, Span-80, and Tween-80.

[0017] The rust inhibitor includes at least one of N-oleoylsarcosine octadecylamine salt, oleoylsarcosine, hydroxyethylidene diphosphonic acid, diethylenetriamine pentaacetic acid, tartaric acid, citric acid, succinic acid, sodium petroleum sulfonate, zinc cyclohexaneate, alkenyl succinic acid, tribasic acid, barium petroleum sulfonate, sodium dodecylbenzene sulfonate, barium petroleum sulfonate, zinc dodecylbenzene sulfonate, and zinc cyclohexaneate.

[0018] The metal deactivator includes at least one of thiadiazole derivatives, benzotriazole derivatives, benzotriazole, methylbenzotriazole, and methylbenzotriazole sodium salt.

[0019] The antioxidant includes at least one of 2,6-di-tert-butyl-p-cresol, 2,6-di-tert-butyl mixed phenol, N,N-diethylhydroxylamine, cyclohexylamine, N,N-di-sec-butyl-p-phenylenediamine, alkyl diphenylamine, thiocarbamate, didodecanol thiodipropionate, and distearyl thiodipropionate.

[0020] The viscosity index improver is at least one of polyvinyl n-butyl ether, polymethacrylate, polyacrylate, styrene polyester, hydrogenated styrene-butadiene, hydrogenated styrene-isoprene copolymer, ethylene-propylene copolymer and polyisobutylene.

[0021] The present invention also provides a method for preparing a water-soluble heavy-load forming oil, comprising the following steps:

[0022] S001. Mix the oiliness agent and viscosity index improver and stir at 75-80°C until it becomes clear and transparent;

[0023] S002. Slowly add the extreme pressure agent, phosphorous acid and surfactant to the mixed solution obtained in step S001, and stir until the solution is clear and transparent;

[0024] S003. Slowly add antioxidant, metal deactivator and rust inhibitor to the mixed solution obtained in step S002 in sequence, and stir until the solution is clear and transparent to obtain water-soluble heavy-load forming oil.

[0025] The beneficial effects of the present invention are as follows: the present invention provides a water-soluble heavy-load forming oil, which has the following advantages compared with the existing forming oil:

[0026] (1) It has good extreme pressure lubricity and is suitable for heavy-load one-shot molding. By using an oiliness agent in combination with a viscosity index improver, the water-soluble heavy-load molding oil can form a high-strength lubricating film between the workpiece and the mold during the molding process of the workpiece; at the same time, the combination of an oiliness agent and a viscosity index improver can effectively disperse the extreme pressure agent and phosphorous acid in the molding oil, and can quickly form a high-strength lubricating film through chemical action during use, effectively reducing the wear of the mold and the workpiece. The combination of an extreme pressure agent with an oiliness agent and a viscosity index improver can ensure that the molding oil still has sufficient oil film strength in a high-temperature environment, and can lubricate the mold and the workpiece for a long time.

[0027] (2) Emulsifiable, easy to clean, good in rust and corrosion resistance, and long service life. By adding surfactants to the water-soluble heavy-duty molding oil, the molding oil can be effectively emulsified, making it easy to clean the molding oil on the mold and workpiece, and there will be no problems affecting the use of the workpiece or the subsequent processing procedures due to the residual molding oil. By adding antioxidants, metal deactivators and rust inhibitors to the water-soluble heavy-duty molding oil, the antioxidants, metal deactivators and rust inhibitors can form an effective synergistic effect, so that the water-soluble heavy-duty molding oil containing more acidic substances has high corrosion inhibition and rust resistance.

[0028] The present invention also provides a method for preparing a water-soluble heavy-load molding oil. The provided preparation method is simple and efficient, and the equipment used in the preparation method is easy to deploy, and can be widely promoted in the molding processing industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 The present invention is a flow chart of a method for preparing a water-soluble heavy-load forming oil. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] A water-soluble heavy-duty forming oil, calculated by mass percentage, comprises the following components:

[0032] Oiliness agent 37-48%, extreme pressure agent 21-23%, surfactant 16-18%, rust inhibitor 6-8%, phosphorous acid 4-6%, antioxidant 2-3%, metal deactivator 2-3%, viscosity index improver 1-2%.

[0033] In the above-mentioned water-soluble heavy-load molding oil, the oiliness agent can be adsorbed on the friction surface by polar groups to form a molecular oriented adsorption film. In the molding process of the workpiece, the mold can be prevented from contacting the workpiece, thereby reducing the friction and wear of the workpiece and the mold. Specifically, the oiliness agent can include at least one of fatty acid octyl ester, fatty acid isooctyl ester, oxidized fatty acid octyl ester, fatty acid methyl ester, tall oil, tall oil fatty acid, oleic acid, ricinoleic acid, coconut oleic acid, oleic acid pentaerythritol ester, cottonseed oil, tetrapoly ricinoleic acid ester, trimethylolpropane oleate, and neodecanoic acid. The present invention introduces the above-mentioned oiliness agent into the formula system of the water-soluble heavy-load molding oil, and controls the amount of the oiliness agent, so that the water-soluble heavy-load molding oil can use the oiliness agent as the basic system, so that the oiliness agent takes into account the role of lubrication and solvent at the same time, and there is no need to introduce base oil additionally into the formula system of the water-soluble heavy-load molding oil.

[0034] In the above-mentioned water-soluble heavy-duty molding oil, the viscosity index improver is mostly an oil-soluble polymer compound, which is an additive that can improve the viscosity-temperature performance of the oil product, ensuring that the molding oil still has sufficient viscosity to form a lubricating film at high temperatures. In the present invention, the oiliness agent and the viscosity index improver are used in the molding oil in combination, which can form a high-strength lubricating film between the mold and the workpiece, effectively reducing the wear of the mold and the workpiece.

[0035] In the above-mentioned water-soluble heavy-duty forming oil, the extreme pressure agent is a heavy-duty additive that reacts with the friction pair surface under extremely harsh conditions such as high temperature and high pressure to form an extreme pressure lubricating film. In the one-time forming process, the mold and the workpiece surface are not completely smooth. Under heavy load, the oil mold may not be able to prevent the contact of the tiny protrusions of the friction pair, which will cause high temperature and wear. Therefore, it is necessary to add an extreme pressure agent to the forming oil to ensure the lubrication performance of the forming oil. Phosphorous acid has a faster phosphorus release effect and can be used in conjunction with the extreme pressure agent to enable the heavy-duty forming oil to exert its extreme pressure lubricity as soon as possible, effectively reducing the wear of the mold and the workpiece.

[0036] In the above-mentioned water-soluble heavy-loaded forming oil, the surfactant can emulsify the heavy-loaded one-time forming oil in water, thereby improving the cleaning performance of the forming oil. The antioxidant can delay the oxidation of the forming oil during use and storage, which can increase the service life of the forming oil and enable the forming oil to be stored for a long time. The metal deactivator can be used in conjunction with the antioxidant to further slow down the oxidation of the one-time forming oil and prevent corrosion of metal workpieces and molds. The rust inhibitor can be used together with the antioxidant and the metal deactivator to prevent corrosion of metal workpieces and molds and ensure the surface quality of the workpiece.

[0037] The present invention uses an oiliness agent and a viscosity index improver in combination, so that the water-soluble heavy-duty molding oil can form a high-strength lubricating film between the workpiece and the mold during the molding process of the workpiece; at the same time, the combination of the oiliness agent and the viscosity index improver can effectively disperse the extreme pressure agent and phosphorous acid in the molding oil, and can quickly form a high-strength lubricating film through chemical action when used, effectively reducing the wear of the mold and the workpiece. The extreme pressure agent is combined with the oiliness agent and the viscosity index improver, so that the molding oil still has sufficient oil film strength in a high temperature environment, and can lubricate the mold and the workpiece for a long time.

[0038] In addition, the present invention can effectively emulsify the molding oil by adding a surfactant to the water-soluble heavy-load molding oil, so that the molding oil is easy to clean on the mold and the workpiece, and the problem of affecting the use of the workpiece or the subsequent processing procedures due to the residual molding oil will not occur. By adding an antioxidant, a metal deactivator and a rust inhibitor to the water-soluble heavy-load molding oil, the antioxidant, the metal deactivator and the rust inhibitor can form an effective synergistic effect, so that the water-soluble heavy-load molding oil containing more acidic substances has high corrosion inhibition and rust resistance.

[0039] Preferably, the oiliness agent comprises tetrameric ricinoleate, oxidized fatty acid octyl ester and tall oil fatty acid. The mass ratio of tetrameric ricinoleate: oxidized fatty acid octyl ester: tall oil fatty acid is (5-7.5): (25-28): (7-11).

[0040] Preferably, the extreme pressure agent includes a sulfur-based extreme pressure agent, an oil-soluble phosphorus-based extreme pressure agent, and a water-soluble phosphorus-based extreme pressure agent. Among them, the sulfur-based extreme pressure agent may include at least one of sulfurized animal oil, sulfurized fatty acid ester, dibutyl sulfide, dioctyl disulfide, diphenyl sulfide, benzyl sulfide, isobutylene sulfide, propylene sulfide, and cyclohexene sulfide;

[0041] The oil-soluble phosphorus-based extreme pressure agent may include at least one of trimethyl phosphate, triethyl phosphate, tributyl phosphate, triphenyl phosphate, trihexyl phosphate, isooctyl phosphate, castor oil phosphate, lauryl alcohol phosphate, oleyl alcohol phosphate, and trioleyl alcohol phosphate;

[0042] The water-soluble phosphorus-based extreme pressure agent may include at least one of oleyl alcohol polyoxyethylene ether phosphate, lauryl alcohol polyoxyethylene ether phosphate, isomeric tridecanol polyoxyethylene ether phosphate, and isooctyl alcohol polyoxyethylene ether phosphate.

[0043] The sulfur-based extreme pressure agent can provide lubrication performance for the molding oil through chemical action at high temperature; and the oil-soluble phosphorus-based extreme pressure anti-wear agent has a structure of esters formed by 1 to 3 fatty alcohol molecules and phosphoric acid, which can provide lubrication performance for the molding oil through chemical action at medium and low temperatures. The water-soluble phosphorus-based extreme pressure anti-wear agent has a structure of esters formed by fatty alcohol ether molecules containing several ethoxy groups and phosphoric acid, which provides lubrication performance through chemical action at medium and low temperatures, and the water-soluble phosphorus-based extreme pressure anti-wear agent has hydrophilicity and can be used as a hydrophilic emulsifier to further improve the cleaning performance of the molding oil. Compared with the use of sulfur-based extreme pressure agents alone, the present invention can enhance the lubrication effect under heavy loads during the entire process of workpiece molding by using sulfur-based extreme pressure agents in combination with oil-soluble phosphorus-based extreme pressure agents and water-soluble phosphorus-based extreme pressure agents. Compared with the use of sulfur-based extreme pressure agents alone, there will be no problems of biting or wear on the workpiece and the mold in the initial stage of workpiece processing.

[0044] Preferably, the sulfur-based extreme pressure agent is a compound of sulfurized fatty acid ester and sulfurized isobutylene, the sulfur-based extreme pressure agent is an oil-soluble phosphorus-based extreme pressure agent is oleyl alcohol phosphate, and the water-soluble phosphorus-based extreme pressure agent is isomeric tridecanol polyoxyethylene ether phosphate. The mass ratio of sulfurized fatty acid ester: sulfurized isobutylene: oleyl alcohol phosphate: isomeric tridecanol polyoxyethylene ether phosphate is (7.5-8): (1.5-2): (7-8): 5.

[0045] Specifically, the surfactant includes at least one of lauramide propylamine oxide, tallow amine polyoxyethylene ether, oleylamine polyoxyethylene ether, dodecylamine polyoxyethylene ether, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, oleyl alcohol polyoxyethylene ether, oleic acid polyoxyethylene ether, Span-80, and Tween-80. In a preferred embodiment, the surfactant is lauramide propylamine oxide.

[0046] Specifically, the rust inhibitor includes at least one of N-oleoylsarcosine octadecylamine salt, oleoylsarcosine, hydroxyethylidene diphosphonic acid, diethylenetriamine pentaacetic acid, tartaric acid, citric acid, succinic acid, sodium petroleum sulfonate, zinc cyclohexane, alkenyl succinic acid, tribasic acid, barium petroleum sulfonate, sodium dodecylbenzene sulfonate, barium petroleum sulfonate, zinc dodecylbenzene sulfonate, and zinc cyclohexane.

[0047] In a preferred embodiment, the rust inhibitor is a compound of N-oleoylsarcosine octadecylamine salt and sodium dodecylbenzene sulfonate. The mass ratio of N-oleoylsarcosine octadecylamine salt: sodium dodecylbenzene sulfonate is (2-3): (4-5). The anti-rust mechanisms of N-oleoylsarcosine octadecylamine salt and sodium dodecylbenzene sulfonate are different. N-oleoylsarcosine octadecylamine salt prevents rust on metal surfaces such as workpieces and molds by complexation, while it prevents rust on the surfaces of workpieces and molds by physical adsorption. The combination of N-oleoylsarcosine octadecylamine salt and sodium dodecylbenzene sulfonate can form an effective synergistic effect. When N-oleoylsarcosine octadecylamine salt or sodium dodecylbenzene sulfonate is used alone, the corrosion inhibition and rust resistance of the molding oil are not significantly improved.

[0048] Specifically, the metal deactivator includes at least one of thiadiazole derivatives, benzotriazole derivatives, benzotriazole, methyl benzotriazole, and methyl benzotriazole sodium salt. In a preferred embodiment, the metal deactivator is benzotriazole. Benzotriazole has a strong metal deactivation effect and can be used in conjunction with rust inhibitors and antioxidants to form an effective synergistic effect.

[0049] Specifically, the antioxidant includes at least one of 2,6-di-tert-butyl-p-cresol, 2,6-di-tert-butyl mixed phenol, N,N-diethylhydroxylamine, cyclohexylamine, N,N-di-sec-butyl-p-phenylenediamine, alkyl diphenylamine, thiocarbamate, didodecanol thiodipropionate, and distearyl thiodipropionate. In a preferred embodiment, the antioxidant is a compound of 2,6-di-tert-butyl-p-cresol, N,N-diethylhydroxylamine and distearyl thiodipropionate, and the mass ratio of 2,6-di-tert-butyl-p-cresol: N,N-diethylhydroxylamine: distearyl thiodipropionate is (0.4-0.5): (0.8-1): (1.2-1.5). The present invention optimizes the composition of the antioxidant and enables the optimized amine / phenol / thioester antioxidant compound system to form an effective synergistic effect with the metal deactivator and the rust inhibitor, so that the heavy-loaded one-time molding oil containing more acidic substances has high corrosion inhibition and rust prevention properties.

[0050] Specifically, the viscosity index improver is at least one of polyethylene n-butyl ether, polymethacrylate, polyacrylate, styrene polyester, hydrogenated styrene-butadiene, hydrogenated styrene-isoprene copolymer, ethylene-propylene copolymer, and polyisobutylene. In a preferred embodiment, the viscosity index improver is hydrogenated styrene-isoprene copolymer, which has good compatibility with raw materials such as oiliness agent and extreme pressure agent, and can ensure that the water-soluble heavy-duty molding oil system is stable and has a high viscosity index. The water-soluble heavy-duty molding oil has anti-oil mist performance and is not easy to corrode the mold and the workpiece.

[0051] The present invention also provides a method for preparing a water-soluble heavy-load forming oil, comprising the following steps:

[0052] S001. Mix the oiliness agent and viscosity index improver and stir at 75-80°C until it becomes clear and transparent;

[0053] S002. Slowly add the extreme pressure agent, phosphorous acid and surfactant to the mixed solution obtained in step S001, and stir until the solution is clear and transparent;

[0054] S003. Slowly add antioxidant, metal deactivator and rust inhibitor to the mixed solution obtained in step S002 in sequence, and stir until the solution is clear and transparent to obtain water-soluble heavy-load forming oil.

[0055] The preparation method provided by the present invention is simple and efficient, and the equipment used in the preparation method is easy to deploy, and can be widely promoted in the molding processing industry.

[0056] In order to further illustrate the water-soluble heavy-load forming oil and the preparation method provided by the present invention, the following examples and comparative examples are provided.

[0057] Example 1

[0058] The present embodiment provides a water-soluble heavy-load forming oil, which includes the following components, calculated by mass percentage: 37% of oiliness agent, 23% of extreme pressure agent, 18% of surfactant, 8% of rust inhibitor, 6% of phosphorous acid, 3% of antioxidant, 3% of metal deactivator, and 2% of viscosity index improver.

[0059] The oiliness agent is composed of tetrameric ricinoleic acid ester, oxidized fatty acid octyl ester and tall oil fatty acid. The mass ratio of tetrameric ricinoleic acid ester: oxidized fatty acid octyl ester: tall oil fatty acid is 5:25:7.

[0060] The surfactant is lauryl amide propyl amine oxide.

[0061] The viscosity index improver is hydrogenated styrene-isoprene copolymer. The extreme pressure agent is composed of sulfided fatty acid ester, sulfided isobutylene, oleyl alcohol phosphate and isomeric tridecanol polyoxyethylene ether phosphate, and the mass ratio of sulfided fatty acid ester: sulfided isobutylene: oleyl alcohol phosphate: isomeric tridecanol polyoxyethylene ether phosphate is 8:2:8:5.

[0062] The antioxidant consists of 2,6-di-tert-butyl-p-cresol, N,N-diethylhydroxylamine and distearyl thiodipropionate, and the mass ratio of 2,6-di-tert-butyl-p-cresol:N,N-diethylhydroxylamine:distearyl thiodipropionate is 0.5:1:1.5.

[0063] The metal deactivator is benzotriazole.

[0064] The rust inhibitor consists of N-oleoylsarcosine octadecylamine salt and sodium dodecylbenzene sulfonate, and the mass ratio of N-oleoylsarcosine octadecylamine salt to sodium dodecylbenzene sulfonate is 3:5.

[0065] This embodiment also provides a method for preparing a water-soluble heavy-load forming oil, comprising the following steps:

[0066] S001. Mix the oiliness agent and viscosity index improver and stir at 75-80°C until it becomes clear and transparent;

[0067] S002. Slowly add the extreme pressure agent, phosphorous acid and surfactant to the mixed solution obtained in step S001, and stir until the solution is clear and transparent;

[0068] S003. Slowly add antioxidant, metal deactivator and rust inhibitor to the mixed solution obtained in step S002 in sequence, and stir until the solution is clear and transparent to obtain water-soluble heavy-load forming oil.

[0069] Example 2

[0070] The present embodiment provides a water-soluble heavy-load forming oil, which includes the following components, calculated by mass percentage: 48% of oiliness agent, 21% of extreme pressure agent, 16% of surfactant, 6% of rust inhibitor, 4% of phosphorous acid, 2% of antioxidant, 2% of metal deactivator, and 1% of viscosity index improver.

[0071] The oiliness agent is composed of tetrameric ricinoleic acid ester, oxidized fatty acid octyl ester and tall oil fatty acid. The mass ratio of tetrameric ricinoleic acid ester: oxidized fatty acid octyl ester: tall oil fatty acid is 9:28:11.

[0072] The surfactant is lauryl amide propyl amine oxide.

[0073] The viscosity index improver is hydrogenated styrene-isoprene copolymer. The extreme pressure agent is composed of sulfided fatty acid ester, sulfided isobutylene, oleyl alcohol phosphate and isomeric tridecanol polyoxyethylene ether phosphate, and the mass ratio of sulfided fatty acid ester: sulfided isobutylene: oleyl alcohol phosphate: isomeric tridecanol polyoxyethylene ether phosphate is 7.5:1:5:7.5.

[0074] The antioxidant consists of 2,6-di-tert-butyl-p-cresol, N,N-diethylhydroxylamine and distearyl thiodipropionate, and the mass ratio of 2,6-di-tert-butyl-p-cresol:N,N-diethylhydroxylamine:distearyl thiodipropionate is 0.4:0.8:1.2.

[0075] The metal deactivator is benzotriazole.

[0076] The rust inhibitor consists of N-oleoylsarcosine octadecylamine salt and sodium dodecylbenzene sulfonate, and the mass ratio of N-oleoylsarcosine octadecylamine salt to sodium dodecylbenzene sulfonate is 2:4.

[0077] This embodiment also provides a method for preparing a water-soluble heavy-load forming oil, and the preparation method is the same as that in Example 1.

[0078] Example 3

[0079] The present embodiment provides a water-soluble heavy-load forming oil, which includes the following components, calculated by mass percentage: 43% of oiliness agent, 23% of extreme pressure agent, 16% of surfactant, 6% of rust inhibitor, 6% of phosphorous acid, 3% of antioxidant, 2% of metal deactivator, and 1% of viscosity index improver.

[0080] The oiliness agent is composed of tetrameric ricinoleic acid ester, oxidized fatty acid octyl ester and tall oil fatty acid. The mass ratio of tetrameric ricinoleic acid ester: oxidized fatty acid octyl ester: tall oil fatty acid is 7:27:9.

[0081] The surfactant is lauryl amide propyl amine oxide.

[0082] The viscosity index improver is hydrogenated styrene-isoprene copolymer. The extreme pressure agent is composed of sulfided fatty acid ester, sulfided isobutylene, oleyl alcohol phosphate and isomeric tridecanol polyoxyethylene ether phosphate, and the mass ratio of sulfided fatty acid ester: sulfided isobutylene: oleyl alcohol phosphate: isomeric tridecanol polyoxyethylene ether phosphate is 8:2:8:5.

[0083] The antioxidant consists of 2,6-di-tert-butyl-p-cresol, N,N-diethylhydroxylamine and distearyl thiodipropionate, and the mass ratio of 2,6-di-tert-butyl-p-cresol:N,N-diethylhydroxylamine:distearyl thiodipropionate is 0.5:1.0:1.5.

[0084] The metal deactivator is benzotriazole.

[0085] The rust inhibitor consists of N-oleoylsarcosine octadecylamine salt and sodium dodecylbenzene sulfonate, and the mass ratio of N-oleoylsarcosine octadecylamine salt to sodium dodecylbenzene sulfonate is 2:4.

[0086] This embodiment also provides a method for preparing a water-soluble heavy-load forming oil, and the preparation method is the same as that in Example 1.

[0087] Comparative Example 1

[0088] This comparative example provides a water-soluble heavy-load forming oil, which comprises the following components, calculated by mass percentage: 37% of oiliness agent, 23% of extreme pressure agent, 18% of surfactant, 8% of rust inhibitor, 6% of phosphorous acid, 3% of antioxidant, 3% of metal deactivator, and 2% of viscosity index improver.

[0089] The oiliness agent is composed of tetrameric ricinoleic acid ester, oxidized fatty acid octyl ester and tall oil fatty acid. The mass ratio of tetrameric ricinoleic acid ester: oxidized fatty acid octyl ester: tall oil fatty acid is 5:25:7.

[0090] The surfactant is lauryl amide propyl amine oxide.

[0091] The viscosity index improver is hydrogenated styrene-isoprene copolymer. The extreme pressure agent is composed of sulfided fatty acid ester and sulfided isobutylene, and the mass ratio of sulfided fatty acid ester: sulfided isobutylene: oleyl alcohol phosphate: isomeric tridecanol polyoxyethylene ether phosphate is 17:6.

[0092] The antioxidant consists of 2,6-di-tert-butyl-p-cresol, N,N-diethylhydroxylamine and distearyl thiodipropionate, and the mass ratio of 2,6-di-tert-butyl-p-cresol:N,N-diethylhydroxylamine:distearyl thiodipropionate is 0.5:1:1.5.

[0093] The metal deactivator is benzotriazole.

[0094] The rust inhibitor consists of N-oleoylsarcosine octadecylamine salt and sodium dodecylbenzene sulfonate, and the mass ratio of N-oleoylsarcosine octadecylamine salt to sodium dodecylbenzene sulfonate is 3:5.

[0095] This comparative example also provides a method for preparing a water-soluble heavy-load forming oil, and the preparation method is the same as that of Example 1.

[0096] Comparative Example 2

[0097] This comparative example provides a water-soluble heavy-load forming oil, which comprises the following components, calculated by mass percentage: 37% of oiliness agent, 23% of extreme pressure agent, 18% of surfactant, 8% of rust inhibitor, 6% of phosphorous acid, 3% of antioxidant, 3% of metal deactivator, and 2% of viscosity index improver.

[0098] The oiliness agent is composed of tetrameric ricinoleic acid ester, oxidized fatty acid octyl ester and tall oil fatty acid. The mass ratio of tetrameric ricinoleic acid ester: oxidized fatty acid octyl ester: tall oil fatty acid is 5:25:7.

[0099] The surfactant is lauryl amide propyl amine oxide.

[0100] The viscosity index improver is hydrogenated styrene-isoprene copolymer. The extreme pressure agent is composed of sulfided fatty acid ester, sulfided isobutylene, oleyl alcohol phosphate and isomeric tridecanol polyoxyethylene ether phosphate, and the mass ratio of sulfided fatty acid ester: sulfided isobutylene: oleyl alcohol phosphate: isomeric tridecanol polyoxyethylene ether phosphate is 8:2:8:5.

[0101] The antioxidant consists of 2,6-di-tert-butyl-p-cresol, N,N-diethylhydroxylamine and distearyl thiodipropionate, and the mass ratio of 2,6-di-tert-butyl-p-cresol:N,N-diethylhydroxylamine:distearyl thiodipropionate is 0.5:1:1.5.

[0102] The metal deactivator is benzotriazole. The rust inhibitor is sodium dodecylbenzene sulfonate.

[0103] This comparative example also provides a method for preparing a water-soluble heavy-load forming oil, and the preparation method is the same as that of Example 1.

[0104] Comparative Example 3: Commercially available heavy-duty forming oil (UWP Forming Oil WW).

[0105] Performance tests were performed on the water-soluble heavy-load forming oils provided in Examples 1 to 3, Comparative Examples 1 to 3, and commercially available heavy-load forming oils, respectively. The test items included extreme pressure performance, kinematic viscosity, viscosity index, antioxidant performance, copper sheet corrosion performance, carbon steel corrosion performance, and flash point.

[0106] The extreme pressure performance test of forming oil is carried out in accordance with GB / T12583-1998 Determination of Extreme Pressure Performance of Lubricants (Four Balls) and the maximum no-seizure load (P B ) and sintering point (P D ). Test instrument model: Xiamen Tianji MS-10A.

[0107] The kinematic viscosity test and viscosity index calculation method of molding oil are carried out in accordance with GB / T 265-1988 Determination of kinematic viscosity of petroleum products and calculation of dynamic viscosity. Test instrument model: Dalian North BF-03F.

[0108] The oxidation resistance test of molding oil is carried out in accordance with "SH / T 0193-2008 Determination of oxidation stability of lubricating oil - Rotating oxygen bomb method", and the oxidation time is tested. Test instrument model: Jinshi JSH0101.

[0109] The corrosion performance test of the formed oil copper sheet is carried out in accordance with "GB / T5096-2017 Liquefied Petroleum Gas Copper Sheet Corrosion".

[0110] The corrosion performance test of forming oil carbon steel is carried out in accordance with "GB / T6144-2010 Synthetic Cutting Fluid".

[0111] The flash point test of molding oil is carried out in accordance with GB / T3536-2008 Determination of flash point and fire point of petroleum products - Cleveland open cup method. Test instrument model: Zhonghui ZHK303.

[0112] The test results are shown in the following table:

[0113]

[0114] In the test results in the above table, copper sheet corrosion grade 1B is better than grade 4A, and carbon steel corrosion grade A is better than grade B and grade C. From the test results in the above table, it can be seen that the various performance indicators of the water-soluble heavy-load forming oils provided in Examples 1 to 3 are better than those of the commercially available heavy-load forming oil in Comparative Example 3.

[0115] The extreme pressure performance of the water-soluble heavy-loaded forming oil provided in Comparative Example 1 is weaker than that of the water-soluble heavy-loaded forming oil provided in Examples 1 to 3. This is because in Comparative Example 1, the extreme pressure agent is only composed of sulfurized fatty acid esters and sulfurized isobutylene, which cannot enhance the lubrication effect under heavy load. The corrosion performance of the water-soluble heavy-loaded forming oil provided in Comparative Example 2 is not as good as that of the water-soluble heavy-loaded forming oil provided in Examples 1 to 3. This is because in the water-soluble heavy-loaded forming oil provided in Comparative Example 2, the rust inhibitor only uses sodium dodecylbenzene sulfonate, which cannot form an effective synergistic effect, and the corrosion inhibition and rust resistance of the forming oil are not significantly improved.

[0116] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A water-soluble heavy-duty forming oil, characterized in that: Calculated by mass percentage, it includes the following components: Oiliness agent 37-48%, extreme pressure agent 21-23%, surfactant 16-18%, rust inhibitor 6-8%, phosphorous acid 4-6%, antioxidant 2-3%, metal deactivator 2-3%, viscosity index improver 1-2%; The oiliness agent includes at least one of fatty acid octyl ester, fatty acid isooctyl ester, oxidized fatty acid octyl ester, fatty acid methyl ester, tall oil, tall oil fatty acid, oleic acid, ricinoleic acid, coconut oleic acid, pentaerythritol oleate, cottonseed oil, tetrapolyricinoleic acid ester, trimethylolpropane oleate, and neodecanoic acid.

2. The water-soluble heavy-duty forming oil according to claim 1, characterized in that: The oiliness agent includes tetrapolyricinoleic acid ester, oxidized fatty acid octyl ester and tall oil fatty acid.

3. The water-soluble heavy-duty forming oil according to claim 1, characterized in that: The extreme pressure agent includes a sulfur-based extreme pressure agent, an oil-soluble phosphorus-based extreme pressure agent and a water-soluble phosphorus-based extreme pressure agent.

4. The water-soluble heavy-load forming oil according to claim 3, characterized in that: The sulfur-based extreme pressure agent includes at least one of sulfurized animal oil, sulfurized fatty acid ester, dibutyl sulfide, dioctyl disulfide, diphenyl sulfide, benzyl sulfide, isobutylene sulfide, propylene sulfide, and cyclohexene sulfide; The oil-soluble phosphorus-based extreme pressure agent includes at least one of trimethyl phosphate, triethyl phosphate, tributyl phosphate, triphenyl phosphate, trihexyl phosphate, isooctyl phosphate, castor oil phosphate, lauryl alcohol phosphate, oleyl alcohol phosphate, and trioleyl alcohol phosphate; The water-soluble phosphorus-based extreme pressure agent includes at least one of oleyl alcohol polyoxyethylene ether phosphate, lauryl alcohol polyoxyethylene ether phosphate, isomeric tridecanol polyoxyethylene ether phosphate, and isooctyl alcohol polyoxyethylene ether phosphate.

5. The water-soluble heavy-load forming oil according to claim 1, characterized in that: The surfactant includes at least one of lauramide propylamine oxide, tallow amine polyoxyethylene ether, oleylamine polyoxyethylene ether, dodecylamine polyoxyethylene ether, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, oleyl alcohol polyoxyethylene ether, oleic acid polyoxyethylene ether, Span-80, and Tween-80.

6. The water-soluble heavy-duty forming oil according to claim 1, characterized in that: The rust inhibitor includes at least one of N-oleoylsarcosine octadecylamine salt, oleoylsarcosine, hydroxyethylidene diphosphonic acid, diethylenetriamine pentaacetic acid, tartaric acid, citric acid, succinic acid, sodium petroleum sulfonate, zinc cyclohexaneate, alkenyl succinic acid, tribasic acid, barium petroleum sulfonate, sodium dodecylbenzene sulfonate, barium petroleum sulfonate, zinc dodecylbenzene sulfonate, and zinc cyclohexaneate.

7. The water-soluble heavy-duty forming oil according to claim 1, characterized in that: The metal deactivator includes at least one of thiadiazole derivatives, benzotriazole derivatives, benzotriazole, methylbenzotriazole, and methylbenzotriazole sodium salt.

8. The water-soluble heavy-duty forming oil according to claim 1, characterized in that: The antioxidant includes at least one of 2,6-di-tert-butyl-p-cresol, 2,6-di-tert-butyl mixed phenol, N,N-diethylhydroxylamine, cyclohexylamine, N,N-di-sec-butyl-p-phenylenediamine, alkyl diphenylamine, thiocarbamate, didodecanol thiodipropionate, and distearyl thiodipropionate.

9. The water-soluble heavy-duty forming oil according to claim 1, characterized in that: The viscosity index improver is at least one of polyvinyl n-butyl ether, polymethacrylate, polyacrylate, styrene polyester, hydrogenated styrene-butadiene, hydrogenated styrene-isoprene copolymer, ethylene-propylene copolymer and polyisobutylene.

10. A method for preparing a water-soluble heavy-duty forming oil according to any one of claims 1 to 9, characterized in that: The following steps are involved: S001. Mix the oiliness agent and viscosity index improver and stir at 75-80°C until it becomes clear and transparent; S002. Slowly add the extreme pressure agent, phosphorous acid and surfactant to the mixed solution obtained in step S001, and stir until the solution is clear and transparent; S003. Slowly add antioxidant, metal deactivator and rust inhibitor to the mixed solution obtained in step S002 in sequence, and stir until the solution is clear and transparent to obtain water-soluble heavy-load molding oil.

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