Pre-coating oil for high-lubrication type aluminum ring-pull can material and preparation method of pre-coating oil

Abstract

The invention relates to the field of C10M169 / 00, in particular to pre-coating oil for a high-lubrication type aluminum ring-pull can material and a preparation method of the pre-coating oil. The pre-coating oil for the high-lubrication type aluminum ring-pull can material is prepared from the following raw materials in parts by mass: 80-90 parts of polyol ester base oil, 1-5 parts of an emulsifier, 1-5 parts of a penetrant, 0.1-1 part of a lubricant, 1-5 parts of an antirust agent and 1-5 parts of an antioxidant. The pre-coating oil provided by the invention is wide in raw material source and has certain environment-friendly performance; the preparation method is relatively simple, only according to a certain feeding sequence, the materials are fed, mixed and dispersed, and complicated and expensive instruments and equipment are not needed; the product has excellent lubricating property and adhesion property, has no residual oil after being cleaned, and is especially suitable for aluminum ring-pull cans.

Description

Technical Field

[0001] The invention relates to the field of C10M169 / 00, and in particular to a high-lubricity pre-coating oil for aluminum can material and a preparation method thereof. Background Art

[0002] Aluminum cans usually use 3-series aluminum alloy A3104-H19 with manganese as the main alloying element as the base material. They are stretched into a punching die, and then go through the process steps of deep drawing and rolling deformation, and then go through the cleaning, passivation, coating and printing treatments to make them into a packaging container with a can bottom and a can body integrated. During the production of aluminum cans, pre-coating oil is applied to the outer surface of the can body through electrostatic oiling to improve the corrosion resistance of the can body, while also improving the scratch resistance of the can during the transportation process, and reducing the residual scattered rolling aluminum chips. More importantly, as a lubricating base for cupping and stretching operations in the later process, pre-coating oil can work synergistically with cupping oil, stretching fluid, etc. to participate in the process of material surface lubrication.

[0003] At present, the demand for reducing costs and improving environmental protection is getting higher and higher in pre-coating oil production plants and canning plants. In order to further reduce production costs and reduce consumption, some domestic manufacturers have begun to use aluminum strips with a thickness of 0.26-0.27mm as the base material of the can body, and the thickness is still being gradually reduced. However, due to the thinning of the aluminum strip thickness, the can body, especially the 500mL specification can body, has a higher requirement for the degree of tensile deformation during the canning process, which makes it more difficult to control undesirable phenomena such as tensile streaks and can breakage, and puts forward higher requirements for the lubrication performance of the pre-coating oil.

[0004] At present, conventional pre-coating oils on the market are usually made of mineral oil as raw material. For example, patent CN117285975A discloses an easy-to-clean pre-coating oil, and its preparation raw materials mainly include: mineral oil, synthetic ester, lubricity enhancer, polymer emulsifier, penetrant, etc.; However, mineral oil has poor biodegradability and is easy to cause environmental pollution; Therefore, how to provide a low-cost, environmentally friendly, high-lubricity pre-coating oil has become an industry technical problem that urgently needs to be solved. Summary of the invention

[0005] In order to solve the above technical problems, the first aspect of the present invention provides a high-lubricity pre-coating oil for aluminum can materials, the raw materials for preparing the pre-coating oil include: polyol ester base oil, emulsifier, penetrant, lubricant, rust inhibitor and antioxidant.

[0006] As an implementable case, the raw materials for preparing the high-lubricity aluminum can pre-coating oil include, by weight, 80-90 parts of polyol ester base oil, 1-5 parts of emulsifier, 1-5 parts of penetrant, 0.1-1 parts of lubricant, 1-5 parts of rust inhibitor and 1-5 parts of antioxidant.

[0007] As an implementable example, the polyol ester base oil includes: trimethylolpropane octanedecanoic acid ester and / or neopentyl glycol dioleate.

[0008] Furthermore, the polyol ester base oil is trimethylolpropane octanedecanoic acid ester and neopentyl glycol dioleate.

[0009] Furthermore, the mass ratio of trimethylolpropane octanedecanoate to neopentyl glycol dioleate is (6-7):(3-4).

[0010] Furthermore, the kinematic viscosity of the polyol ester base oil at 25°C is 22-30 mm 2 / s.

[0011] Furthermore, the brand of the trimethylolpropane octanedioate is Priolube 3970, which can be purchased from Croda Chemical; the neopentyl glycol dioleate can be purchased from Hubei Kemedi.

[0012] Currently, common pre-coating oils on the market are prepared with mineral oil as the main raw material, but the environmental performance of mineral oil is relatively low. Therefore, the present invention selects polyol ester base oil, especially trimethylolpropane octanedecanoic acid ester and neopentyl glycol dioleate as the polyol ester base oil. Due to its relatively good biodegradability, the environmental performance of the pre-coating oil can be significantly improved.

[0013] Both trimethylolpropane octanoic acid decanoate and neopentyl glycol dioleate have excellent lubricity and wear resistance, which help to reduce the friction and wear between the pre-coating oil and the aluminum can body during coating and printing. At the same time, trimethylolpropane octanoic acid decanoate and neopentyl glycol dioleate can remain stable at high temperatures and are not easily oxidized and decomposed, which help to maintain the high temperature stability of the pre-coating oil. The excellent hydrolysis stability and low volatility of the polyol ester base oil help to form a durable waterproof layer to prevent water vapor and moisture from penetrating from the surface of the pre-coating oil coating, thereby ensuring the waterproofness and durability of the aluminum can. However, the viscosity of the polyol ester base oil needs to be further limited. The appropriate viscosity can ensure that the pre-coating oil has better adhesion and processing properties. If the viscosity is too high, it will be unfavorable for the printing of the pre-coating oil on the surface of the can. In addition, if the viscosity is too high, it will make it difficult to discharge the air in the coating, and bubbles will easily form on the coating surface. The coating may crack due to excessive internal stress during the drying process, affecting the integrity and aesthetics of the coating. Therefore, the present invention preferably has a kinematic viscosity of 22-30 mm at 25° C. after the trimethylolpropane octanedecanoate and neopentyl glycol dioleate are compounded. 2 / s as the polyol ester base oil, it can ensure the excellent wear resistance, aging resistance and coating stability of the pre-coating oil.

[0014] As an implementable case, the emulsifier includes at least one of anionic emulsifier, cationic emulsifier and nonionic emulsifier.

[0015] Furthermore, the emulsifier is a non-ionic emulsifier.

[0016] As an implementable case, the nonionic emulsifier includes: one of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, fatty acid polyoxyethylene ester, and oleic acid diethanolamide.

[0017] Furthermore, the emulsifier is oleic acid diethanolamide, which can be purchased from Jiangsu Haian Petrochemical.

[0018] Non-ionic emulsifiers can improve the wettability of pre-coating oil on the surface of aluminum cans, making it easier for pre-coating oil to spread on the surface of the can body, and polyol ester base oil is not easy to seep out of the system. Specifically, the present invention preferably uses oleic acid diethanolamide as a non-ionic emulsifier, mainly because oleic acid diethanolamide has a stable chemical structure, can maintain stable performance under high temperature and high humidity environment, and functional groups such as amide bonds and alcohol hydroxyl groups in the molecule have strong heat resistance and are not easy to decompose or deteriorate at high temperatures; in addition, oleic acid diethanolamide can form a dense protective film on the metal surface of aluminum cans, which can effectively block the erosion of moisture and high temperature, thereby protecting the metal surface from damage. This dense protective film can also reduce the direct contact and friction between the pre-coating oil and the surface of the can, and significantly reduce the friction coefficient of the pre-coating oil. In addition, oleic acid diethanolamide can also synergize with rust inhibitors to further improve the rust resistance of pre-coating oil.

[0019] As an implementable example, the penetrant includes a fatty alcohol alkoxy compound.

[0020] Furthermore, the brands of the fatty alcohol alkoxylates include LF403, which can be purchased from BASF.

[0021] Fatty alcohol alkoxy compounds can significantly reduce the surface tension of pre-coating oil, making it easier for the pre-coating oil to spread and wet on the surface of aluminum cans, and also have a certain defoaming effect; in addition, the molecular structure of the fatty alcohol alkoxy compounds enables them to form a directional adsorption layer on the surface of the cans, increasing its surface hydrophilicity, making it easier for the pre-coating oil to adhere evenly; the present invention preferably uses a fatty alcohol alkoxy compound with a grade of LF403 as a penetrant, and LF403 can also work together with oleic acid diethanolamide to effectively prevent the pre-coating oil from sticking by reducing friction and electrostatic attraction, making the pre-coating oil easier to be completely washed off in the subsequent cleaning process.

[0022] As an implementable case, the lubricant includes: one or more of natural wax, synthetic wax, zinc stearate, aluminum distearate, dibutyl phthalate, and pentaerythritol stearate.

[0023] Furthermore, the lubricant is pentaerythritol stearate, which can be purchased from Wuhan Kemik Biological.

[0024] Pentaerythritol stearate can increase the plasticity of the pre-coating oil, making it easier to deform and flow during the printing process, thereby improving the adhesion and covering power of the pre-coating oil; at the same time, pentaerythritol stearate can form a uniform lubricating film on the surface of the pre-coating oil, reducing the friction resistance between the pre-coating oil and the surface of the aluminum can, so that the pre-coating oil can be spread more smoothly on the surface of the substrate. In addition, pentaerythritol stearate also has certain antioxidant properties and thermal stability, and works together with antioxidants to prevent the pre-coating oil from oxidative deterioration or thermal decomposition during storage and use.

[0025] As an implementable example, the rust inhibitor includes a carboxylic acid derivative or an amino acid derivative.

[0026] As an implementable example, the carboxylic acid derivative includes: 2,4,6-tris(aminohexanoyl)-1,3,5-triazine; the amino acid derivative includes N-oleoylsarcosine.

[0027] In the present invention, a suitable rust inhibitor can form a uniform and dense film layer on the surface of the aluminum plate, preventing the invasion of corrosive substances and protecting the surface of the aluminum can from oxidation and erosion; and the film layer can effectively reduce the friction coefficient of the pre-coated oil and further improve the lubricity of the surface of the aluminum can.

[0028] Preferably, the antioxidant includes: one of phenol antioxidants, diphenol antioxidants, isothiocyanate antioxidants, phosphate antioxidants, and carboxylic acid antioxidants.

[0029] Furthermore, the antioxidant is a carboxylic acid antioxidant.

[0030] Furthermore, the carboxylic acid antioxidant is neodecanoic acid.

[0031] Neodecanoic acid can inhibit the redox reaction between the components of the raw material system in the pre-coating oil system, and inhibit the generation of foam in the system, thereby improving the stability of the pre-coating oil. In addition, neodecanoic acid can shorten the drying time of the pre-coating oil coating and increase the hardness, which helps to improve the hardness and wear resistance of the aluminum can coating, making the pre-coating oil printed pattern more durable.

[0032] The second aspect of the present invention provides a method for preparing a high-lubricity pre-coating oil for aluminum can material, comprising:

[0033] S1. Set the thermostatic kettle temperature to 38-42°C and add polyol ester base oil;

[0034] S2, then add rust inhibitor and antioxidant, and disperse for 1-2h at a stirring speed of 100-150rpm;

[0035] S3, then slowly and evenly add the emulsifier, the addition time is 3-5min; after adding, disperse at a stirring speed of 100-150rpm for 1-2h;

[0036] S4, add the penetrant, and disperse for 1-2h at a stirring speed of 100-150rpm;

[0037] S5. Finally, add lubricant and disperse for 12-24 hours at a stirring speed of 100-150 rpm.

[0038] Beneficial Effects

[0039] (i) In the present invention, a specific polyol ester base oil is selected as the raw material for preparing the pre-coating oil to replace the mineral oil commonly used on the market, which can further improve the environmental performance of the product while ensuring the high adhesion performance of the pre-coating oil.

[0040] (ii) In the present invention, oleic acid diethanolamide is preferably used as an emulsifier, which has a stable chemical structure, can maintain the stability of the pre-coating oil performance under high temperature and high humidity environment, and can also significantly reduce the friction coefficient of the pre-coating oil; at the same time, oleic acid diethanolamide can also synergistically act with the rust inhibitor to further improve the rust prevention performance of the pre-coating oil.

[0041] (III) In the present invention, fatty alcohol alkoxylate is selected as a penetrant, which can increase the penetration and adsorption speed and wettability of the pre-coating oil on the surface of the aluminum can, making the adhesion of the pre-coating oil more uniform; in addition, fatty alcohol alkoxylate can also synergistically act with oleic acid diethanolamide to prevent the pre-coating oil from sticking, making the pre-coating oil easier to be washed off in the subsequent cleaning process.

[0042] (iv) The present invention selects a suitable lubricant and rust inhibitor compound, which can further improve the lubrication performance and wear resistance of the pre-coating oil, and ensure that the coating has higher stability after the product is used.

[0043] (V) In the present invention, the raw materials for preparation are widely available and the cost is low; and the preparation method is relatively simple, and only a certain order of feeding, mixing and dispersing of the materials is required, without the need for complex and expensive instruments and equipment; the product pre-coated with oil has excellent lubrication performance, and there is no residual oil after cleaning, and is particularly suitable for printing on the surface of aluminum cans. DETAILED DESCRIPTION

[0044] Example 1

[0045] The first aspect of this example provides a high-lubricity pre-coating oil for aluminum can materials, and the raw materials for its preparation, calculated by weight, include: 85 parts of polyol ester base oil, 4 parts of emulsifier, 5 parts of penetrant, 1 part of lubricant, 2 parts of rust inhibitor and 3 parts of antioxidant.

[0046] The polyol ester base oil is a compound of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate, and the compounding mass ratio of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate is 7:3; the brand of trimethylolpropane octanoic acid ester is Priolube 3970 from Hoda, and neopentyl glycol dioleate is purchased from Hubei Kemedi.

[0047] The emulsifier is oleic acid glycol amide, purchased from Haian Petrochemical.

[0048] The penetrant is a fatty alcohol alkoxy compound with a brand name of LF403, purchased from BASF.

[0049] The lubricant is pentaerythritol stearate, purchased from Wuhan Kemik Biology.

[0050] The rust inhibitor is N-oleoyl sarcosine, and its CAS number is 110-25-8.

[0051] The antioxidant is neodecanoic acid, and its CAS number is 26896-20-8.

[0052] The second aspect of this example provides a method for preparing a high-lubricity pre-coating oil for aluminum can material, comprising:

[0053] S1. Set the thermostatic kettle temperature to 40°C and add polyol ester base oil;

[0054] S2, then add rust inhibitor and antioxidant, and disperse at a constant temperature of 40°C for 2h at a stirring speed of 120rpm;

[0055] S3, then slowly and evenly add the emulsifier, the addition time is 4 minutes; after adding, disperse at a constant temperature of 40°C for 1 hour at a stirring speed of 120 rpm;

[0056] S4, add the penetrant, and disperse at a constant temperature of 40°C for 1 h at a stirring speed of 120 rpm;

[0057] S5. Finally, add lubricant and disperse at a constant temperature of 40°C for 24 hours at a stirring speed of 120 rpm.

[0058] Example 2

[0059] The first aspect of this example provides a high-lubricity pre-coating oil for aluminum can materials, and the raw materials for its preparation, calculated by weight, include: 90 parts of polyol ester base oil, 2 parts of emulsifier, 5 parts of penetrant, 0.5 parts of lubricant, 1 part of rust inhibitor and 2 parts of antioxidant.

[0060] The polyol ester base oil is a compound of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate, and the compounding mass ratio of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate is 6:4; the brand of trimethylolpropane octanoic acid ester is Hoda Priolube 3970, and neopentyl glycol dioleate is purchased from Hubei Kemedi.

[0061] The emulsifier is oleic acid glycol amide, purchased from Haian Petrochemical.

[0062] The penetrant is a fatty alcohol alkoxy compound with a brand name of LF403, purchased from BASF.

[0063] The lubricant is pentaerythritol stearate, purchased from Wuhan Kemik Biology.

[0064] The rust inhibitor is N-oleoyl sarcosine, and its CAS number is 110-25-8.

[0065] The antioxidant is neodecanoic acid, and its CAS number is 26896-20-8.

[0066] The second aspect of this example provides a method for preparing a high-lubricity pre-coating oil for aluminum can material, comprising:

[0067] S1. Set the thermostatic kettle temperature to 40°C and add polyol ester base oil;

[0068] S2, then add rust inhibitor and antioxidant, and disperse at a constant temperature of 40°C for 2h at a stirring speed of 120rpm;

[0069] S3, then slowly and evenly add the emulsifier, the addition time is 4 minutes; after adding, disperse at a constant temperature of 40°C for 1 hour at a stirring speed of 120 rpm;

[0070] S4, add the penetrant, and disperse at a constant temperature of 40°C for 1 h at a stirring speed of 120 rpm;

[0071] S5. Finally, add lubricant and disperse at a constant temperature of 40°C for 24 hours at a stirring speed of 120 rpm.

[0072] Comparative Example 1

[0073] The first aspect of this example provides a pre-coating oil for aluminum can material, and the raw materials for its preparation, calculated by weight, include: 90 parts of polyol ester base oil, 5 parts of penetrant, 1 part of lubricant, 2 parts of rust inhibitor and 2 parts of antioxidant.

[0074] The polyol ester base oil is a compound of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate, and the compounding mass ratio of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate is 6:4; the brand of trimethylolpropane octanoic acid ester is Hoda Priolube 3970, and neopentyl glycol dioleate is purchased from Hubei Kemedi.

[0075] The penetrant is a fatty alcohol alkoxy compound with a brand name of LF403, purchased from BASF.

[0076] The lubricant is pentaerythritol stearate, purchased from Wuhan Kemik Biology.

[0077] The rust inhibitor is N-oleoyl sarcosine, and its CAS number is 110-25-8.

[0078] The antioxidant is neodecanoic acid, and its CAS number is 26896-20-8.

[0079] The second aspect of this example provides a method for preparing pre-coating oil for aluminum can material, comprising:

[0080] S1. Set the thermostatic kettle temperature to 40°C and add polyol ester base oil;

[0081] S2, then add rust inhibitor and antioxidant, and disperse at a constant temperature of 40°C for 2h at a stirring speed of 120rpm;

[0082] S3, add the penetrant, and disperse at a constant temperature of 40°C for 1 h at a stirring speed of 120 rpm;

[0083] S4. Finally, add lubricant and disperse at a constant temperature of 40°C for 24 hours at a stirring speed of 120 rpm.

[0084] Comparative Example 2

[0085] The first aspect of this example provides a pre-coating oil for aluminum cans, and the raw materials for its preparation, calculated by weight, include: 90 parts of polyol ester base oil, 4 parts of emulsifier, 0.5 parts of lubricant, 2 parts of rust inhibitor and 3.5 parts of antioxidant.

[0086] The polyol ester base oil is a compound of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate, and the compounding mass ratio of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate is 6:4; the brand of trimethylolpropane octanoic acid ester is Hoda Priolube 3970, and neopentyl glycol dioleate is purchased from Hubei Kemedi.

[0087] The emulsifier is oleic acid glycol amide, purchased from Haian Petrochemical.

[0088] The lubricant is pentaerythritol stearate, purchased from Wuhan Kemik Biology.

[0089] The rust inhibitor is N-oleoyl sarcosine, and its CAS number is 110-25-8.

[0090] The antioxidant is neodecanoic acid, and its CAS number is 26896-20-8.

[0091] The second aspect of this example provides a method for preparing pre-coating oil for aluminum can material, comprising:

[0092] S1. Set the thermostatic kettle temperature to 40°C and add polyol ester base oil;

[0093] S2, then add rust inhibitor and antioxidant, and disperse at a constant temperature of 40°C for 2h at a stirring speed of 120rpm;

[0094] S3, then slowly and evenly add the emulsifier, the addition time is 4 minutes; after adding, disperse at a constant temperature of 40°C for 1 hour at a stirring speed of 120 rpm;

[0095] S4. Finally, add lubricant and disperse at a constant temperature of 40°C for 24 hours at a stirring speed of 120 rpm.

[0096] Comparative Example 3

[0097] The first aspect of this example provides a pre-coating oil for aluminum can material, and the raw materials for its preparation, calculated by weight, include: 86 parts of polyol ester base oil, 4 parts of emulsifier, 5 parts of penetrant, 2 parts of rust inhibitor and 3 parts of antioxidant.

[0098] The polyol ester base oil is a compound of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate, and the compounding mass ratio of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate is 6:4; the brand of trimethylolpropane octanoic acid ester is Hoda Priolube 3970, and neopentyl glycol dioleate is purchased from Hubei Kemedi.

[0099] The emulsifier is oleic acid glycol amide, purchased from Haian Petrochemical.

[0100] The penetrant is a fatty alcohol alkoxy compound with a brand name of LF403, purchased from BASF.

[0101] The rust inhibitor is N-oleoyl sarcosine, and its CAS number is 110-25-8.

[0102] The antioxidant is neodecanoic acid, and its CAS number is 26896-20-8.

[0103] The second aspect of this example provides a method for preparing pre-coating oil for aluminum can material, comprising:

[0104] S1. Set the thermostatic kettle temperature to 40°C and add polyol ester base oil;

[0105] S2, then add rust inhibitor and antioxidant, and disperse at a constant temperature of 40°C for 2h at a stirring speed of 120rpm;

[0106] S3, then slowly and evenly add the emulsifier, the addition time is 4 minutes; after adding, disperse at a constant temperature of 40°C for 1 hour at a stirring speed of 120 rpm;

[0107] S4. Add the penetrant, and disperse at a constant temperature of 40°C for 1 h at a stirring speed of 120 rpm.

[0108] Comparative Example 4

[0109] The first aspect of this example provides a pre-coating oil for aluminum can material, and the raw materials for its preparation include, by weight: 87 parts of polyol ester base oil, 4 parts of emulsifier, 5 parts of penetrant, 1 part of lubricant and 3 parts of antioxidant.

[0110] The polyol ester base oil is a compound of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate, and the compounding mass ratio of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate is 6:4; the brand of trimethylolpropane octanoic acid ester is Hoda Priolube 3970, and neopentyl glycol dioleate is purchased from Hubei Kemedi.

[0111] The emulsifier is oleic acid glycol amide, purchased from Haian Petrochemical.

[0112] The penetrant is a fatty alcohol alkoxy compound with a brand name of LF403, purchased from BASF.

[0113] The lubricant is pentaerythritol stearate, purchased from Wuhan Kemik Biology.

[0114] The antioxidant is neodecanoic acid, and its CAS number is 26896-20-8.

[0115] The second aspect of this example provides a method for preparing pre-coating oil for aluminum can material, comprising:

[0116] S1. Set the thermostatic kettle temperature to 40°C and add polyol ester base oil;

[0117] S2, then add antioxidant, and disperse at a constant temperature of 40°C for 2h at a stirring speed of 120rpm;

[0118] S3, then slowly and evenly add the emulsifier, the addition time is 4 minutes; after adding, disperse at a constant temperature of 40°C for 1 hour at a stirring speed of 120 rpm;

[0119] S4, add the penetrant, and disperse at a constant temperature of 40°C for 1 h at a stirring speed of 120 rpm;

[0120] S5. Finally, add lubricant and disperse at a constant temperature of 40°C for 24 hours at a stirring speed of 120 rpm.

[0121] Comparative Example 5

[0122] The first aspect of this example provides a high-lubricity pre-coating oil for aluminum can materials, and the raw materials for its preparation, calculated by weight, include: 84 parts of polyol ester base oil, 6 parts of emulsifier, 5 parts of penetrant, 1 part of lubricant, 2 parts of rust inhibitor and 2 parts of antioxidant.

[0123] The polyol ester base oil is a compound of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate, and the compounding mass ratio of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate is 6:4; the brand of trimethylolpropane octanoic acid ester is Hoda Priolube 3970, and neopentyl glycol dioleate is purchased from Hubei Kemedi.

[0124] The emulsifier is oleic acid glycol amide, purchased from Haian Petrochemical.

[0125] The penetrant is a fatty alcohol alkoxy compound with a brand name of LF403, purchased from BASF.

[0126] The lubricant is pentaerythritol stearate, purchased from Wuhan Kemik Biology.

[0127] The rust inhibitor is N-oleoyl sarcosine, and its CAS number is 110-25-8.

[0128] The antioxidant is neodecanoic acid, and its CAS number is 26896-20-8.

[0129] The second aspect of this example provides a method for preparing a high-lubricity pre-coating oil for aluminum can material, comprising:

[0130] S1. Set the thermostatic kettle temperature to 40°C and add polyol ester base oil;

[0131] S2, then add rust inhibitor and antioxidant, and disperse at a constant temperature of 40°C for 2h at a stirring speed of 120rpm;

[0132] S3, then slowly and evenly add the emulsifier, the addition time is 4 minutes; after adding, disperse at a constant temperature of 40°C for 1 hour at a stirring speed of 120 rpm;

[0133] S4, add the penetrant, and disperse at a constant temperature of 40°C for 1 h at a stirring speed of 120 rpm;

[0134] S5. Finally, add lubricant and disperse at a constant temperature of 40°C for 24 hours at a stirring speed of 120 rpm.

[0135] Comparative Example 6

[0136] The first aspect of this example provides a high-lubricity pre-coating oil for aluminum can materials, and the raw materials for its preparation, calculated by weight, include: 85 parts of polyol ester base oil, 4 parts of emulsifier, 6 parts of penetrant, 1 part of lubricant, 2 parts of rust inhibitor and 2 parts of antioxidant.

[0137] The polyol ester base oil is a compound of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate, and the compounding mass ratio of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate is 6:4; the brand of trimethylolpropane octanoic acid ester is Hoda Priolube 3970, and neopentyl glycol dioleate is purchased from Hubei Kemedi.

[0138] The emulsifier is oleic acid glycol amide, purchased from Haian Petrochemical.

[0139] The penetrant is a fatty alcohol alkoxy compound with a brand name of LF403, purchased from BASF.

[0140] The lubricant is pentaerythritol stearate, purchased from Wuhan Kemik Biology.

[0141] The rust inhibitor is N-oleoyl sarcosine, and its CAS number is 110-25-8.

[0142] The antioxidant is neodecanoic acid, and its CAS number is 26896-20-8.

[0143] The second aspect of this example provides a method for preparing a high-lubricity pre-coating oil for aluminum can material, comprising:

[0144] S1. Set the thermostatic kettle temperature to 40°C and add polyol ester base oil;

[0145] S2, then add rust inhibitor and antioxidant, and disperse at a constant temperature of 40°C for 2h at a stirring speed of 120rpm;

[0146] S3, then slowly and evenly add the emulsifier, the addition time is 4 minutes; after adding, disperse at a constant temperature of 40°C for 1 hour at a stirring speed of 120 rpm;

[0147] S4, add the penetrant, and disperse at a constant temperature of 40°C for 1 h at a stirring speed of 120 rpm;

[0148] S5. Finally, add lubricant and disperse at a constant temperature of 40°C for 24 hours at a stirring speed of 120 rpm.

[0149] Comparative Example 7

[0150] The first aspect of this example provides a high-lubricity pre-coating oil for aluminum can materials, and the raw materials for its preparation, calculated by weight, include: 84 parts of polyol ester base oil, 4 parts of emulsifier, 5 parts of penetrant, 1 part of lubricant, 6 parts of rust inhibitor and 3 parts of antioxidant.

[0151] The polyol ester base oil is a compound of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate, and the compounding mass ratio of trimethylolpropane octanoic acid ester and neopentyl glycol dioleate is 6:4; the brand of trimethylolpropane octanoic acid ester is Hoda Priolube 3970, and neopentyl glycol dioleate is purchased from Hubei Kemedi.

[0152] The emulsifier is oleic acid glycol amide, purchased from Haian Petrochemical.

[0153] The penetrant is a fatty alcohol alkoxy compound with a brand name of LF403, purchased from BASF.

[0154] The lubricant is pentaerythritol stearate, purchased from Wuhan Kemik Biology.

[0155] The rust inhibitor is N-oleoyl sarcosine, and its CAS number is 110-25-8.

[0156] The antioxidant is neodecanoic acid, and its CAS number is 26896-20-8.

[0157] The second aspect of this example provides a method for preparing a high-lubricity pre-coating oil for aluminum can material, comprising:

[0158] S1. Set the thermostatic kettle temperature to 40°C and add polyol ester base oil;

[0159] S2, then add rust inhibitor and antioxidant, and disperse at a constant temperature of 40°C for 2h at a stirring speed of 120rpm;

[0160] S3, then slowly and evenly add the emulsifier, the addition time is 4 minutes; after adding, disperse at a constant temperature of 40°C for 1 hour at a stirring speed of 120 rpm;

[0161] S4, add the penetrant, and disperse at a constant temperature of 40°C for 1 h at a stirring speed of 120 rpm;

[0162] S5. Finally, add lubricant and disperse at a constant temperature of 40°C for 24 hours at a stirring speed of 120 rpm.

[0163] Performance Evaluation

[0164] The test items and test methods are detailed in Table 1.

[0165] The test results are detailed in Table 2 and Table 2 Continued.

[0166] in:

[0167] The test temperature of kinematic viscosity is 40℃, unit: mm 2 / s.

[0168] The test environment humidity for high temperature and high humidity resistance is 90%, the test environment temperature is 60°C, and the pre-oil coating is placed in this test environment and left to stand for 264 hours.

[0169] Lubricity specifically tests the coefficient of friction of a product.

[0170] The wettability test item is the contact angle between the substrate and the pre-applied oil.

[0171] The test item for the compatibility of the punch cup oil is the contact angle between the substrate and the punch cup oil after the substrate is pre-coated with oil.

[0172] Table 1

[0173]

[0174]

[0175]

[0176] Table 2

[0177]

[0178] Table 2 continued

[0179] Test items Comparative Example 4 Comparative Example 5 Comparative Example 6 Comparative Example 7 Kinematic viscosity 30 38 29 40 High temperature and high humidity resistance Black White spot corrosion on board surface White spot corrosion on board surface No discoloration, no corrosion Lubricity 0.7 0.5 0.7 0.6 Wettability 10° 9° 7° 12° Punch cup oil compatibility 9° 10° 9° 10° Cleanability No oil residue Oil residue 1% No oil residue Oil residue 3%

Claims

1. A highly lubricating pre-coating oil for aluminum cans, characterized in that: The preparation raw materials include: polyol ester base oil, emulsifier, penetrant, lubricant, rust preventive and antioxidant.

2. The highly lubricating pre-coating oil for aluminum can material according to claim 1, characterized in that: The raw materials for preparation include, by weight, 80-90 parts of polyol ester base oil, 1-5 parts of emulsifier, 1-5 parts of penetrant, 0.1-1 parts of lubricant, 1-5 parts of rust inhibitor and 1-5 parts of antioxidant.

3. The highly lubricating pre-coating oil for aluminum can material according to claim 1, characterized in that: The polyol ester base oil includes: trimethylolpropane octanedecanoic acid ester and / or neopentyl glycol dioleate.

4. The highly lubricating pre-coating oil for aluminum can material according to claim 3, characterized in that: The kinematic viscosity of the polyol ester base oil at 25°C is 22-30 mm 2 / s.

5. The highly lubricating pre-coating oil for aluminum can material according to claim 1, characterized in that: The emulsifier includes at least one of anionic emulsifier, cationic emulsifier and nonionic emulsifier.

6. The highly lubricating pre-coating oil for aluminum can material according to claim 5, characterized in that: The nonionic emulsifier includes: one of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, fatty acid polyoxyethylene ester and oleic acid diethanolamide.

7. The highly lubricating pre-coating oil for aluminum can material according to any one of claims 1 to 6, characterized in that: The penetrant includes a fatty alcohol alkoxy compound.

8. The highly lubricating pre-coating oil for aluminum can material according to claim 1, characterized in that: The lubricant comprises one or more of natural wax, synthetic wax, zinc stearate, aluminum distearate, dibutyl phthalate, and pentaerythritol stearate.

9. The highly lubricating pre-coating oil for aluminum can material according to claim 1, characterized in that: The rust inhibitor comprises carboxylic acid derivatives and / or amino acid derivatives.

10. A method for preparing the highly lubricating pre-coating oil for aluminum can material according to any one of claims 1 to 9, characterized in that: include: S1. Set the thermostatic kettle temperature to 38-42°C and add polyol ester base oil; S2, then add rust inhibitor and antioxidant, and disperse for 1-2h at a stirring speed of 100-150rpm; S3, then slowly and evenly add the emulsifier, the addition time is 3-5min; after adding, disperse at a stirring speed of 100-150rpm for 1-2h; S4, add the penetrant, and disperse for 1-2h at a stirring speed of 100-150rpm; S5. Finally, add lubricant and disperse for 12-24 hours at a stirring speed of 100-150 rpm.

Images