A composition for rust preventive oil and a method for preparing the same, the rust preventive oil and use thereof

Abstract

This invention provides a rust-preventive oil composition for bearings and gears, the composition comprising 65-90 parts by weight of base oil; 6-20 parts by weight of rust inhibitor and 0.5-3 parts by weight of additives; wherein the base oil is selected from mineral oil and naphthenic oil. This invention also provides a method for preparing the above composition, comprising: step (1): mixing the base oil evenly; step (2): adding the rust inhibitor and additives to the obtained material 1 and mixing evenly to obtain the composition; wherein the base oil is selected from mineral oil and naphthenic oil. Rust-preventive oil comprising the above composition and its applications are also provided. The composition of this invention, when used as a rust-preventive oil, does not precipitate solid substances after long-term storage, exhibits good stability, and possesses excellent rust-preventive and shock-absorbing properties.

Description

Technical Field

[0001] This invention relates to the field of bearing and gear rust-preventive oil technology, and particularly to a composition for rust-preventive oil and its preparation method, as well as the rust-preventive oil and its application. Background Technology

[0002] In recent years, with the rapid development of my country's machinery processing and automotive industries, the ferrous metal materials involved have become increasingly susceptible to corrosion in the natural atmospheric environment. Rusting of ferrous metal products such as gears and bearings can affect their precision rating, shorten their service life, and even lead to their scrapping. In severe cases, it can cause accidents during use. Therefore, long-term rust prevention of ferrous metal products is a crucial issue of great concern to both manufacturers and users.

[0003] Some ferrous metal products, such as gears, gear rings, meshing parts, bearings and their matching components, bushings, and connecting rod accessories, are important mechanical parts, mainly made of high-carbon steel. This material has a high carbon content, and due to the difference in chemical potential between iron-carbon compounds and iron in the metallographic structure, an electrochemical corrosion occurs easily in humid atmospheric environments and saline marine environments. For these bearings and gears with specific material properties, good surface protection is needed to reduce friction and vibration, ensuring efficient operation of the bearings or gears. Using rust-preventive oil is an effective way to reduce friction and dampen vibration.

[0004] To improve the rust-preventive performance of rust-preventive oils, it is necessary to enhance their salt spray resistance. Currently, multiple functional rust inhibitors are typically added to the formulation of rust-preventive oils. However, as the content and types of additives in rust-preventive oils increase, the interactions between the additives are amplified, leading to the precipitation of solid substances over time. This affects the rust-preventive performance of the oil and the vibration damping performance during subsequent processing of bearings and gear components. Chinese invention patent CN104342252A discloses a rust-preventive oil composition preparation and its uses, consisting of the following components by weight percentage: 75-90 parts base oil; 5-15 parts oil-soluble barium sulfonate rust inhibitor; 1-3 parts synthetic ester; 0.5-1 part extreme pressure anti-wear agent; and 0.1-1 parts other additives. This invention achieves salt spray resistance for 48-72 hours and exhibits good vibration damping performance. However, this invention's rust-preventive oil will precipitate a small amount of solid substances after prolonged storage, which is detrimental to medium- and long-term rust prevention and subsequent use of workpieces. Summary of the Invention

[0005] To address the problems of poor stability and the formation of solid precipitates after prolonged storage in existing rust-preventive oils, which result in poor rust prevention and shock absorption performance, this invention provides a composition for rust-preventive oil and its preparation method, as well as the rust-preventive oil and its application. The rust-preventive oil composition and rust-preventive oil containing the composition of this invention have good stability, do not form solid precipitates after prolonged storage, and have good rust prevention and shock absorption performance.

[0006] The objective of this invention is mainly achieved through the following technical solutions.

[0007] In a first aspect, the present invention provides a composition for rust-preventive oil, the composition comprising 65-90 parts by weight of base oil; 6-20 parts by weight of rust inhibitor and 0.5-3 parts by weight of additives.

[0008] The base oils include mineral oils and naphthenic oils.

[0009] Preferably, the composition comprises 70-90 parts by weight of base oil; and / or 8-18 parts by weight of rust inhibitor; and / or 0.5-2 parts by weight of additives.

[0010] And / or, the amount of mineral oil used is 20-70 parts by weight, preferably 30-65 parts by weight, more preferably 40-55 parts by weight; the amount of naphthenic oil used is 20-50 parts by weight, preferably 25-40 parts by weight, more preferably 35-40 parts by weight.

[0011] And / or, the amount of the rust inhibitor is 6-20 parts by weight, preferably 8-16 parts by weight; the amount of the additive is 0.5-3 parts by weight, preferably 0.5-2 parts by weight.

[0012] Preferably, the viscosity index of the mineral oil is >80, and more preferably, the viscosity index is >90.

[0013] Preferably, the mineral oil is selected from one or more of HVI 75, HVI 100, HVI 125, HVI 150, HVI 500, HVI 650, HVI 120BS, HVI 150BS, HVI II-2, and HVI II-4, and more preferably from one or more of HVI 150, HVI 500, HVI 120BS, and HVI 150BS.

[0014] Preferably, based on the total number of carbon atoms in the cycloalkyl oil, the carbon atom content of the carbon ring in the cycloalkyl oil is 50%-100%, more preferably 50%-70%.

[0015] Preferably, the naphthenic oil is selected from N4010 and / or N4016, more preferably N4016.

[0016] Preferably, the rust inhibitor is selected from sulfonates and / or naphthenates.

[0017] Preferably, the rust inhibitor is composed of sulfonate and naphthenate.

[0018] Preferably, the amount of the sulfonate is 10-18 parts by weight, more preferably 10-13 parts by weight; the amount of the naphthenate is 0.5-3 parts by weight, more preferably 0.5-2 parts by weight.

[0019] Preferably, the sulfonate is selected from calcium sulfonate and / or barium sulfonate.

[0020] Preferably, the sulfonate is composed of calcium sulfonate and barium sulfonate.

[0021] Preferably, the amount of barium sulfonate is 8-15 parts by weight, more preferably 9-13 parts by weight; the amount of calcium sulfonate is 0.2-2 parts by weight, more preferably 0.2-1 parts by weight.

[0022] Preferably, the barium sulfonate salt is selected from petroleum barium sulfonate and / or synthetic barium sulfonate.

[0023] Preferably, the synthesized barium sulfonate is selected from barium alkylbenzene sulfonate and / or barium dinonylnaphthalene sulfonate.

[0024] And / or, the calcium sulfonate salt is selected from petroleum calcium sulfonate and / or low-base synthetic calcium sulfonate, preferably low-base synthetic calcium sulfonate.

[0025] Preferably, the sulfonate has an alkalinity of ≤40 mgKOH / g, and more preferably 2-30 mgKOH / g.

[0026] And / or, the effective sulfonate content of the sulfonate is ≥50%, preferably 55-70%.

[0027] Preferably, the number of carbon rings in the cycloalkanoate is 1-6, more preferably 2-3.

[0028] Preferably, the cycloalkanoate comprises a five-carbon ring and / or a six-carbon ring, more preferably a six-carbon ring.

[0029] Preferably, the naphthenate is selected from zinc naphthenate and / or sodium naphthenate, and more preferably zinc naphthenate.

[0030] Preferably, the additives include anti-wear agents and / or metal deactivators.

[0031] Preferably, the additive consists of an anti-wear agent and a metal deactivator.

[0032] Preferably, the amount of the anti-wear agent is 0.2-1 parts by weight, more preferably 0.5-1 parts by weight; the amount of the metal deactivator is 0.02-1 parts by weight, more preferably 0.05-1 parts by weight.

[0033] Preferably, the anti-wear agent is selected from at least one of dibutyl phosphite (T304), tricresyl phosphate (T306), and phenyl thiophosphate (T309).

[0034] Preferably, the metal deactivator is selected from benzotriazole dodecylamine salt (T551) and / or 2-mercaptobenzothiazole (T561).

[0035] In a second aspect, the present invention provides a method for preparing the composition for rust-preventive oil described in the first aspect, the method comprising:

[0036] Step (1): Mix the base oil evenly.

[0037] Step (2): Add rust inhibitor and additives to the well-mixed base oil and mix well to obtain the composition.

[0038] The base oils include mineral oils and naphthenic oils.

[0039] Preferably, the method of uniform mixing in step (1) includes stirring at 60-75°C for 1-2 hours.

[0040] And / or, the mixing method in step (2) includes stirring at 60-75°C for 2-3 hours.

[0041] Preferably, the method further includes step (3): filtering the composition obtained in step (2), preferably filtering with a pore size of 2-10 μm.

[0042] Thirdly, the present invention provides a rust-preventive oil, the rust-preventive oil comprising the composition for rust prevention described in the first aspect or the composition prepared by the preparation method described in the second aspect.

[0043] Fourthly, the present invention provides the application of the rust-preventive oil described in the third aspect in the rust prevention of bearings or gears.

[0044] This invention relates to a composition for rust-preventive oil and its preparation method, as well as the rust-preventive oil and its application. The composition for rust-preventive oil prepared by the method of this invention has good stability, does not precipitate solid substances after long-term storage, and can reach level 5 in cleanliness test. It has excellent rust prevention and shock absorption performance for metal rust prevention, with a damp heat test time of up to 672 hours, a salt spray test time of up to 168 hours, and a wear resistance of up to 0.3 mm. Detailed Implementation

[0045] In a first aspect, the present invention provides a composition for rust-preventive oil, the composition comprising 65-90 parts by weight of base oil; 6-20 parts by weight of rust inhibitor and 0.5-3 parts by weight of additives.

[0046] The base oils include mineral oils and naphthenic oils.

[0047] The inventors of this invention have discovered through research that the composition provided by this invention uses mineral oil and naphthenic oil as base oils, and the resulting composition does not precipitate solid substances after long-term storage, thus improving the stability of the composition. At the same time, the composition has improved rust prevention and shock absorption properties.

[0048] According to some embodiments of the present invention, the composition comprises 70-90 parts by weight of base oil; and / or 8-18 parts by weight of rust inhibitor; and / or 0.5-2 parts by weight of additives. Such a formulation can further improve the stability, rust prevention, and shock absorption properties of the composition.

[0049] In this invention, to further improve the stability, rust prevention and shock absorption properties of the composition, preferably, the amount of mineral oil used is 20-70 parts by weight, more preferably 30-65 parts by weight, and more preferably 40-55 parts by weight; and / or, the amount of naphthenic oil used is 20-50 parts by weight, more preferably 25-40 parts by weight, and more preferably 35-40 parts by weight.

[0050] In this invention, to further improve the stability, rust prevention and shock absorption properties of the composition, preferably, the amount of the rust inhibitor is 6-20 parts by weight, more preferably 8-16 parts by weight; and / or, the amount of the additive is 0.5-3 parts by weight, more preferably 0.5-2 parts by weight.

[0051] In this invention, the kinematic viscosity of the mineral oil can affect the ductility of the rust-preventive oil at different temperatures, thereby affecting the rust-preventive performance and shock-absorbing performance of the rust-preventive oil. In order to ensure that the rust-preventive oil can spread evenly on the metal surface, the viscosity index of the mineral oil is >80, more preferably >90.

[0052] In some preferred embodiments, the mineral oil is selected from one or more of HVI 75, HVI 100, HVI 125, HVI 150, HVI 500, HVI 650, HVI 120BS, HVI 150BS, HVI II-2, and HVI II-4, preferably one or more of HVI 150, HVI 500, HVI 120BS, and HVI 150BS.

[0053] In this invention, the carbon atom content of the carbon rings in the mineral oil is <30%.

[0054] In this invention, there is no particular limitation on the number of carbon atoms in the cycloalkyl oil, which can be 10-50, preferably 12-50.

[0055] In this invention, the carbon atom content of the carbon ring in the naphthenic oil has a solubilizing effect on the rust inhibitor of the rust-preventive oil, and can enhance the rust-preventive performance of the rust-preventive oil. Preferably, based on the total carbon atom number of the naphthenic oil, the carbon atom content of the carbon ring in the naphthenic oil is 50%-100%, more preferably 50%-70%. In this invention, the term "carbon atom number of the carbon ring" refers to the number of carbon atoms forming the carbon ring. Generally, the carbon atoms of the carbon ring do not include the carbon atoms of the branched chains on the carbon ring.

[0056] In some preferred embodiments, the cycloalkyl oil is selected from N4010 and / or N4016, more preferably N4016. In this invention, the carbon atom content of the carbon ring in the cycloalkyl oil N4010 and cycloalkyl oil N4016 is typically above 50%, and the carbon atom content of the carbon ring can be adjusted according to specific needs. The carbon atom content of the carbon ring in the cycloalkyl oil can be determined using the method described in DL / T 929-2018.

[0057] According to some embodiments of the present invention, the rust inhibitor is an oil-soluble rust inhibitor; selected from sulfonates and / or naphthenates; more preferably, the rust inhibitor is composed of sulfonates and naphthenates; in the composition of the present invention, when sulfonates, naphthenates, mineral oils and naphthenic oils are present simultaneously, the sulfonates, naphthenates, mineral oils and naphthenic oils can work together to improve the stability, rust prevention and shock absorption performance of the composition.

[0058] In a more preferred embodiment of the present invention, the amount of the sulfonate is 10-18 parts by weight, more preferably 10-13 parts by weight; and the amount of the naphthenate is 0.5-3 parts by weight, more preferably 0.5-2 parts by weight.

[0059] In this invention, preferably, the sulfonate is selected from calcium sulfonate and / or barium sulfonate.

[0060] In this invention, preferably, the sulfonate is composed of calcium sulfonate and barium sulfonate.

[0061] In this invention, preferably, the amount of barium sulfonate is 8-15 parts by weight, more preferably 9-13 parts by weight; and the amount of calcium sulfonate is 0.2-2 parts by weight, more preferably 0.2-1 parts by weight.

[0062] In this invention, preferably, the barium sulfonate salt is selected from petroleum barium sulfonate and / or synthetic barium sulfonate.

[0063] In this invention, preferably, the synthesized barium sulfonate is selected from barium alkylbenzene sulfonate and / or barium dinonylnaphthalene sulfonate.

[0064] In a preferred embodiment of the present invention, the calcium sulfonate salt is selected from petroleum calcium sulfonate and / or low-base synthetic calcium sulfonate, more preferably low-base synthetic calcium sulfonate, such as low-base synthetic calcium sulfonate with grade T104.

[0065] In this invention, the alkalinity of the sulfonate affects its rust-preventive performance; the higher the alkalinity, the worse the rust prevention. Preferably, the alkalinity of the sulfonate is ≤40mgKOH / g, and more preferably 2-30mgKOH / g.

[0066] In this invention, sulfonates generally contain impurities. The term "sulfonate" in this invention typically refers to sulfonates with an effective sulfonate content (i.e., sulfonate purity, also known as sulfonate content) ≥ 50%, preferably 55-70%. The purity of sulfonates affects the rust-preventive performance of the rust-preventive oil, leading to a decrease in rust-preventive performance. Studies have found that when the effective sulfonate content in the sulfonate is preferably 55-70%, this effect can be effectively reduced or even eliminated.

[0067] It is understood that the effective sulfonate content refers to the percentage of the mass of the sulfonate structure relative to the total mass of the sulfonate product.

[0068] In this invention, the number of carbon rings in the cycloalkanoate is 1-6, preferably 2-3.

[0069] Furthermore, the naphthenate comprises a five-carbon ring and / or a six-carbon ring, and this preferred embodiment can further enhance the oil's stability and rust prevention performance.

[0070] In this invention, preferably, the naphthenate is selected from zinc naphthenate and / or sodium naphthenate, more preferably zinc naphthenate.

[0071] In a preferred embodiment of the present invention, the additives include an anti-wear agent and a metal deactivator. By adding the anti-wear agent and the metal deactivator, the rust-preventive and vibration-damping properties of the composition can be further improved.

[0072] In a more preferred embodiment of the present invention, the amount of the anti-wear agent is 0.2-1 parts by weight, more preferably 0.5-1 parts by weight; and the amount of the metal deactivator is 0.02-1 parts by weight, more preferably 0.05-1 parts by weight.

[0073] Research has shown that the metal deactivator and the rust inhibitor have a synergistic effect, which is more conducive to improving rust prevention on metal surfaces. Meanwhile, the anti-wear agent can compete with the rust inhibitor for adsorption on the metal surface; by selecting an optimal dosage ratio, it is highly beneficial to improve both rust prevention and shock absorption performance.

[0074] In a preferred embodiment of the present invention, the anti-wear agent is selected from at least one of di-n-butyl phosphite (T304), tricresyl phosphate (T306), and phenyl thiophosphate (T309), more preferably tricresyl phosphate and / or phenyl thiophosphate; the metal deactivator is selected from benzotriazole dodecylamine salt (T551) and / or 2-mercaptobenzothiazole (T561), more preferably benzotriazole dodecylamine salt.

[0075] In a second aspect, the present invention provides a method for preparing the composition for rust-preventive oil described in the first aspect, the method comprising:

[0076] Step (1): Mix the base oils thoroughly;

[0077] Step (2): Add the rust inhibitor and additives to the well-mixed base oil and mix well to obtain the composition;

[0078] The base oils include mineral oils and naphthenic oils.

[0079] In a preferred embodiment of the present invention, the method of uniform mixing in step (1) includes stirring at 60-75°C. The present invention does not impose a particular limitation on the stirring time, as long as the base oil can be stirred evenly. Preferably, the stirring time is 1-2 hours, more preferably 1.5-2 hours.

[0080] And / or, the mixing method in step (2) includes stirring at 60-75°C, preferably 65-75°C. The present invention does not impose any particular limitation on the stirring time, as long as the mixed components are stirred evenly. Preferably, the stirring time is 1.5-4 hours, more preferably 2-3 hours.

[0081] In a preferred embodiment of the present invention, the method further includes step (3): cooling the composition obtained in step (2). There are no particular requirements for the cooling method; it can be natural cooling or cooling via a refrigerant, as long as no impurities are introduced into the composition during the cooling process. There are no particular requirements for the temperature after cooling, as long as it is conducive to subsequent filling. The temperature after cooling can be reduced to room temperature or to 35-40°C.

[0082] In a preferred embodiment of the present invention, the method further includes step (4): filtering the composition after cooling in step (3), preferably filtering with a pore size of 2-10 μm. The present invention can further improve the cleanliness of the composition through this filtration, effectively improving the stability, rust prevention, and shock absorption properties of the composition.

[0083] Thirdly, the present invention provides a rust-preventive oil, the rust-preventive oil comprising the composition for rust prevention described in the first aspect or the composition prepared by the preparation method described in the second aspect.

[0084] Fourthly, the present invention provides an application of the rust-preventive oil described in the third aspect in rust prevention of bearings or gears.

[0085] The following detailed description of preferred embodiments of the present invention illustrates the principles of the invention and is not intended to limit the scope of the invention.

[0086] The materials used in the following examples and comparative examples are from the following sources:

[0087] Naphthenic oils: grades N4010 (carbon atom content of 55% of carbon rings), N4016 (carbon atom content of 40% of carbon rings) and N4016 (carbon atom content of 55% of carbon rings), manufactured by PetroChina Xinjiang Oilfield Company;

[0088] Base oils: grades HVI 75, HVI 150, HVI 500, HVI 150BS, manufactured by Sinopec Shanghai Branch;

[0089] Barium alkylbenzene sulfonate: Grade T701A, manufactured by Suzhou Special Oil Products Factory;

[0090] Zinc naphthenate: Grade T704, manufactured by Suzhou Sanli Special Additives Co., Ltd.

[0091] Methyl metaborate: brand name TMB, manufacturer is Hubei Dongcao Chemical Technology Co., Ltd.;

[0092] Barium petroleum sulfonate: Grade T701, manufactured by Suzhou Sanli Special Additives Co., Ltd.

[0093] Barium dinonylnaphthalenesulfonate: Grade T705, manufactured by Suzhou Yuanxing Special Oil Products Co., Ltd.

[0094] C12-14 fatty alcohol ester: CAS number 80206-82-2, manufacturer is Jiangsu Runfeng Synthetic Technology Co., Ltd.;

[0095] N-Amino-α-naphthylamine: CAS No. 90-30-2, manufacturer is Wuhan Chengtian Fine Chemical Co., Ltd.;

[0096] Tricresol phosphate: Grade T306, manufactured by Guangzhou Ruishengyan Chemical Technology Co., Ltd.

[0097] Dibutyl phosphite: Grade T304, manufactured by Guangzhou Ruishengyan Chemical Technology Co., Ltd.

[0098] Phenyl thiophosphate: Grade T309, manufactured by Jinzhou Chenghua New Materials Co., Ltd.

[0099] Benztriazole dodecylamine salt: Grade T551, manufactured by Jinan Jinyu Chemical Co., Ltd.;

[0100] Low-alkalinity synthetic calcium sulfonate: Grade T104, manufactured by Jinzhou Kangtai Lubricating Oil Additives Co., Ltd.

[0101] 2-Mercaptobenzothiazole: Brand name T561, manufactured by Shanghai Tuhe Industrial Co., Ltd.

[0102] Example 1

[0103] Step (1): At 75°C, 56.25 parts by weight of HVI 75 (viscosity index of 93) and 30 parts by weight of N4010 (carbon atom content of 55%) were stirred for 2 hours to mix evenly.

[0104] Step (2): Reduce the temperature to 65°C, add 10 parts by weight of barium dinonylnaphthalene sulfonate (base value of 28 mg KOH / g, effective sulfonate content of 55%), 3 parts by weight of barium alkylbenzene sulfonate (alkyl carbon number of 12, base value of 22 mg KOH / g, effective sulfonate content of 53%), 0.7 parts by weight of tricresyl phosphate and 0.05 parts by weight of benzotriazole dodecylamine salt to the well-mixed base oil and stir for 2.5 hours until well mixed.

[0105] Step (3): After cooling the composition obtained in step (2) to 40°C, filter it through a bag filter with a pore size of 10 μm to obtain composition A1 for rust prevention oil.

[0106] Example 2

[0107] Step (1): At 75°C, 59.25 parts by weight of HVI 150 (viscosity index of 93) and 30 parts by weight of N4010 (carbon atom content of 55%) were stirred for 2 hours to mix evenly.

[0108] Step (2): Reduce the temperature to 65°C, add 9 parts by weight of barium dinonylnaphthalenesulfonate (base value of 28 mg KOH / g, effective sulfonate content of 55%), 1 part by weight of zinc naphthenate (two six-carbon rings, 12 carbon atoms), 0.7 parts by weight of tricresyl phosphate and 0.05 parts by weight of benzotriazole dodecylamine salt to the well-mixed base oil and stir for 2.5 hours until well mixed.

[0109] Step (3): After cooling the composition obtained in step (2) to 40°C, filter it through a bag filter with a pore size of 10 μm to obtain composition A2 for rust prevention oil.

[0110] Example 3

[0111] Step (1): At 75°C, 59.25 parts by weight of HVI 150 (viscosity index of 93) and 30 parts by weight of N4016 (carbon atom content of 55%) were stirred for 2 hours to mix evenly.

[0112] Step (2): Reduce the temperature to 65°C, add 9 parts by weight of barium dinonylnaphthalenesulfonate (base value of 2.3 mg KOH / g, effective sulfonate content of 55%), 1 part by weight of zinc naphthenate (two six-carbon rings, 12 carbon atoms), 0.7 parts by weight of tricresyl phosphate and 0.05 parts by weight of benzotriazole dodecylamine salt to the well-mixed base oil and stir for 2.5 hours until well mixed.

[0113] Step (3): After cooling the composition obtained in step (2) to 40°C, filter it through a bag filter with a pore size of 10 μm to obtain composition A3 for rust prevention oil.

[0114] Example 4

[0115] Step (1): At 75°C, 48.25 parts by weight of HVI 500 (viscosity index of 92), 30 parts by weight of N4016 (carbon atom content of 55% of carbon rings) and 10 parts by weight of N4010 (carbon atom content of 55% of carbon rings) were stirred for 2 hours to mix evenly.

[0116] Step (2): Reduce the temperature to 65°C, add 10 parts by weight of barium dinonylnaphthalenesulfonate (base value of 2.3 mg KOH / g, effective sulfonate content of 55%), 1 part by weight of low-base-value synthetic calcium sulfonate (base value of 27.6 mg KOH / g, effective sulfonate content of 55%), 0.7 parts by weight of phenyl thiophosphate and 0.05 parts by weight of benzotriazole dodecylamine salt to the well-mixed base oil and stir for 2.5 hours until well mixed.

[0117] Step (3): After cooling the composition obtained in step (2) to 40°C, filter it through a bag filter with a pore size of 10 μm to obtain composition A4 for rust prevention oil.

[0118] Example 5

[0119] Step (1): At 75°C, 30 parts by weight of HVI 150 (viscosity index of 93), 28.25 parts by weight of HVI150BS (viscosity index of 91) and 30 parts by weight of N4016 (carbon atom content of 55% of carbon ring) were stirred for 2 hours to mix evenly.

[0120] Step (2): Reduce the temperature to 65°C, add 10 parts by weight of barium dinonylnaphthalenesulfonate (base value 28 mg KOH / g, effective sulfonate content 55%), 1 part by weight of low base value synthetic calcium sulfonate (base value 27.6 mg KOH / g, effective sulfonate content 55%), 0.7 parts by weight of di-n-butyl phosphite and 0.05 parts by weight of benzotriazole dodecylamine salt to the well-mixed base oil and stir for 2.5 hours until well mixed.

[0121] Step (3): After cooling the composition obtained in step (2) to 40°C, filter it through a bag filter with a pore size of 10 μm to obtain composition A5 for rust prevention oil.

[0122] Example 6

[0123] Step (1): At 75°C, 49.05 parts by weight of HVI 500 (viscosity index of 93) and 38 parts by weight of N4016 (carbon atom content of 55%) were stirred for 2 hours to mix evenly.

[0124] Step (2): Reduce the temperature to 65℃, add 10 parts by weight of barium dinonylnaphthalenesulfonate (base value 28mgKOH / g, effective sulfonate content 55%), 0.7 parts by weight of low base value synthetic calcium sulfonate (base value 27.6mgKOH / g, effective sulfonate content 55%), 1.5 parts by weight of zinc naphthenate (two six-carbon rings, 12 carbon atoms), 0.7 parts by weight of di-n-butyl phosphite and 0.05 parts by weight of benzotriazole dodecylamine salt to the well-mixed base oil and stir for 2.5 hours until well mixed.

[0125] Step (3): After cooling the composition obtained in step (2) to 40°C, filter it through a bag filter with a pore size of 5 μm to obtain composition A6 for rust-preventive oil.

[0126] Example 7

[0127] Step (1): At 70°C, 44 parts by weight of HVI 150 (viscosity index of 93) and 38 parts by weight of N4010 (carbon atom content of 55% in carbon rings) were stirred for 1.5 hours to mix evenly.

[0128] Step (2): Reduce the temperature to 65°C, add 13 parts by weight of barium alkylbenzenesulfonate (alkyl carbon number 12, base value 22 mg KOH / g, effective sulfonate content 53%), 1 part by weight of low base value synthetic calcium sulfonate (base value 27.6 mg KOH / g, effective sulfonate content 55%), 2 parts by weight of zinc naphthenate (two six-carbon rings, carbon number 12), 1 part by weight of phenyl thiophosphate and 1 part by weight of 2-mercaptobenzothiazole to the well-mixed base oil and stir for 2.5 h until well mixed.

[0129] Step (3): After cooling the composition obtained in step (2) to 40°C, filter it through a bag filter with a pore size of 5 μm to obtain composition A7 for rust prevention oil.

[0130] Example 8

[0131] Step (1): At 70°C, 23.95 parts by weight of HVI 120BS (viscosity index of 92), 28 parts by weight of HVI150 (viscosity index of 93), and 38 parts by weight of N4016 (carbon atom content of carbon ring of 55%) were stirred for 2 hours to mix evenly.

[0132] Step (2): Reduce the temperature to 65°C, add 9 parts by weight of barium dinonylnaphthalenesulfonate (base value of 2.3 mg KOH / g, effective sulfonate content of 55%), 0.5 parts by weight of zinc naphthenate (two six-carbon rings, 12 carbon atoms), 0.5 parts by weight of phenyl thiophosphate and 0.05 parts by weight of 2-mercaptobenzothiazole to the well-mixed base oil and stir for 2.5 h until well mixed.

[0133] Step (3): After cooling the composition obtained in step (2) to 40°C, filter it through a bag filter with a pore size of 5 μm to obtain composition A8 for rust prevention oil.

[0134] Example 9

[0135] A composition for rust-preventive oil was prepared according to the method of Example 6, except that 77.05 parts by weight of HVI 500 (viscosity index of 93) and 10 parts by weight of N4016 (carbon atom content of carbon rings of 55%) were selected as the base oils, resulting in composition A9 for rust-preventive oil.

[0136] Example 10

[0137] A composition for rust-preventive oil was prepared according to the method of Example 6, except that only 12.2 parts by weight of low-alkalinity synthetic calcium sulfonate (alkalinity of 27.6 mg KOH / g and effective sulfonate content of 55%) was selected as the rust inhibitor, resulting in composition A10 for rust-preventive oil.

[0138] Example 11

[0139] A composition for rust-preventive oil was prepared according to the method of Example 6, except that the rust inhibitor used was 6.2 parts by weight of barium dinonylnaphthalenesulfonate (base value 28 mg KOH / g, effective sulfonate content 55%), 2 parts by weight of low-base-value synthetic calcium sulfonate (base value 27.6 mg KOH / g, effective sulfonate content 55%), and 4 parts by weight of zinc naphthenate (two six-carbon rings, 12 carbon atoms), to obtain composition A11 for rust-preventive oil.

[0140] Example 12

[0141] A composition for rust-preventive oil was prepared according to the method of Example 6, except that the rust inhibitor and other additives were selected as follows: 4 parts by weight of barium dinonylnaphthalenesulfonate (base value of 28 mg KOH / g, effective sulfonate content of 55%), 2 parts by weight of low-base value synthetic calcium sulfonate (base value of 27.6 mg KOH / g, effective sulfonate content of 55%), 1.95 parts by weight of zinc naphthenate (with two six-carbon rings and 12 carbon atoms), 3 parts by weight of di-n-butyl phosphite, and 2 parts by weight of benzotriazole dodecylamine salt, to obtain composition A12 for rust-preventive oil.

[0142] Example 13

[0143] A composition for rust-preventive oil was prepared according to the method of Example 6, except that the selected additive combination was 0.7 parts by weight of methyl metaborate and 0.05 parts by weight of benzotriazole, resulting in composition A13 for rust-preventive oil.

[0144] Example 14

[0145] A composition for rust-preventive oil was prepared according to the method of Example 6, except that N4016 (containing 40% carbon atoms in the carbon rings) was added to obtain composition A14.

[0146] Example 15

[0147] The composition for rust-preventive oil was prepared according to the method of Example 4, except that the sulfonate rust inhibitor was selected from 7 parts by weight of barium dinonylnaphthalenesulfonate (base value of 2.3 mg KOH / g, effective sulfonate content of 55%) and 4 parts by weight of low-base-value synthetic calcium sulfonate (base value of 27.6 mg KOH / g, effective sulfonate content of 55%), resulting in composition A15.

[0148] Example 16

[0149] A composition for rust-preventive oil was prepared according to the method of Example 6, except that benzotriazole dodecylamine salt was not added, resulting in composition A16.

[0150] Example 17

[0151] A composition for rust-preventive oil was prepared according to the method of Example 6, except that the base value of barium dinonylnaphthalenesulfonate was 28 mg KOH / g and the effective sulfonate content was 40%, and the base value of low-base-value synthetic calcium sulfonate was 27.6 mg KOH / g and the effective sulfonate content was 40%; thus, composition A17 was obtained.

[0152] Comparative Example 1

[0153] Prepared according to the method disclosed in Example 6 of CN104342252B, the specific steps are as follows:

[0154] Step (1): Stir 82.9 parts by weight of HVI 150 (viscosity index of 93) at 75°C.

[0155] Step (2): Reduce the temperature to 65℃, add 10 parts by weight of T701, 5 parts by weight of T705, 1 part by weight of C12-14 fatty alcohol ester, 0.5 parts by weight of triphenyl thiophosphate and 0.6 parts by weight of N-amino-a-naphthylamine to the stirred HVI 150, and stir for 2.5 hours until the mixture is uniform.

[0156] Step (3): After cooling the composition obtained in step (2) to 40°C, filter it through a bag filter with a pore size of 10 μm to obtain composition B1 for rust prevention oil.

[0157] Comparative Example 2

[0158] Step (1): Stir 88.25 parts by weight of HVI 150 (viscosity index of 93) at 75°C.

[0159] Step (2): Reduce the temperature to 65℃, add 10 parts by weight of barium dinonylnaphthalenesulfonate (base value 28mgKOH / g, effective sulfonate content 55%), 1 part by weight of low base value synthetic calcium sulfonate (base value 27.6mgKOH / g, effective sulfonate content 55%), 0.7 parts by weight of di-n-butyl phosphite, and 0.05 parts by weight of benzotriazole dodecylamine salt to HVI 150, and stir for 2.5h until the mixture is uniform.

[0160] Step (3): After cooling the composition obtained in step (2) to 40°C, filter it through a bag filter with a pore size of 10 μm to obtain composition B2 for rust prevention oil.

[0161] Comparative Example 3

[0162] Step (1): Stir 89.25 parts by weight of HVI 75 (viscosity index of 93) at 75°C.

[0163] Step (2): Reduce the temperature to 65℃, add 10 parts by weight of barium dinonylnaphthalenesulfonate (base value of 28mgKOH / g, effective sulfonate content of 55%), 0.7 parts by weight of tricresyl phosphate, and 0.05 parts by weight of benzotriazole dodecylamine salt to the stirred HVI 75, and stir for 2.5h until the mixture is uniform.

[0164] Step (3): After cooling the composition obtained in step (2) to 40°C, filter it through a bag filter with a pore size of 10 μm to obtain composition B3 for rust prevention oil.

[0165] Comparative Example 4

[0166] The composition for rust-preventive oil was prepared according to the method of Example 6, except that 87.05 parts by weight of N4016 (with a carbon atom content of 55% in the carbon rings) was selected as the base oil to obtain composition B4.

[0167] Comparative Example 5

[0168] A composition for rust-preventive oil was prepared according to the method of Example 6, except that...

[0169] Step (1): At 75°C, 74 parts by weight of HVI 500 (viscosity index of 93) and 20 parts by weight of N4016 (carbon atom content of 55%) were stirred for 2 hours to mix evenly.

[0170] Step (2): Reduce the temperature to 65°C, add 4 parts by weight of barium dinonylnaphthalenesulfonate (base value 28 mg KOH / g, effective sulfonate content 55%), 2 parts by weight of low-base-value synthetic calcium sulfonate (base value 27.6 mg KOH / g, effective sulfonate content 55%), 15 parts by weight of zinc naphthenate (two six-carbon rings, 12 carbon atoms), 3 parts by weight of di-n-butyl phosphite and 2 parts by weight of benzotriazole dodecylamine salt to the well-mixed base oil and stir for 2.5 hours until well mixed.

[0171] Step (3): After cooling the composition obtained in step (2) to 40°C, filter it through a bag filter with a pore size of 5 μm to obtain composition B5 for rust prevention oil.

[0172] Comparative Example 6

[0173] A composition for rust-preventive oil was prepared according to the method of Example 6, except that only 87.05 parts by weight of HVI 500 (viscosity index of 93) of base oil was selected to obtain composition B6 for rust-preventive oil.

[0174] Test case

[0175] The following performance tests were performed on the compositions for rust prevention oil prepared in Examples 1-17 and Comparative Examples 1-6.

[0176] Various performance tests were conducted on ferrous metals, using 45# steel sheets as an example.

[0177] (1) The damp heat test time shall be tested in accordance with GB / T 2361-1992.

[0178] (2) The salt spray test time shall be tested in accordance with SH / T 0081-1991.

[0179] (3) Wear resistance was tested according to SH / T 018-2017.

[0180] (4) Cleanliness was tested according to NAS1638.

[0181] The results of the above four performance tests are shown in Table 1.

[0182]

[0183]

[0184] As can be seen from the data in Table 1, the compositions for rust-preventive oil prepared using the preferred technical solutions of the present invention in Examples 6-8 have an wear resistance of 0.30 mm, a damp heat test time of up to 672 h, a salt spray test time of up to 168 h, and a cleanliness level of up to 5, exhibiting excellent stability, rust prevention performance, and shock absorption performance.

[0185] Compared to Example 9, which used a base oil with a mineral oil to naphthenic oil ratio of 77.05:10, Example 6 used a preferred base oil composition. The resulting rust-preventive oil had an anti-wear ratio of 0.30 mm, a cleanliness level of 5, and better shock absorption performance. It also had an anti-wear ratio of 0.30 mm and a damp heat test time of up to 672 hours, demonstrating better stability and rust prevention performance.

[0186] Compared to Example 10 which uses a single type of rust inhibitor, Example 6 uses a preferred combination of rust inhibitors. The rust-preventive oil prepared has an abrasion resistance of 0.30 mm, a cleanliness level of 5, and better shock absorption performance. The abrasion resistance can reach 0.30 mm, and the damp heat test time can reach 672 h, showing better stability and rust prevention performance.

[0187] Compared to Example 11, which used a sulfonate to naphthenate ratio of 8.2:4 for the rust inhibitor components, Example 6 used a preferred rust inhibitor component ratio. The prepared rust inhibitor oil has an abrasion resistance of 0.30 mm, a cleanliness level of 5, and better shock absorption performance. The abrasion resistance can reach 0.30 mm, and the damp heat test time can reach 672 h, showing better stability and rust prevention performance.

[0188] Compared to the ratio of rust inhibitor to additive used in Example 12 (7.95:5), Example 6 uses a preferred ratio of rust inhibitor to additive, and the prepared rust-preventive oil can achieve an abrasion resistance of 0.30 mm, a cleanliness level of 5, and better shock absorption performance; the abrasion resistance can reach 0.30 mm, and the damp heat test time can reach 672 h, exhibiting better stability and rust prevention performance.

[0189] Compared to the additive combination of methyl metaborate and benzotriazole used in Example 13, Example 6 uses a preferred additive combination, and the prepared rust-preventive oil can achieve an abrasion resistance of 0.30 mm, a cleanliness level of 5, and better shock absorption performance; the abrasion resistance can reach 0.30 mm, and the damp heat test time can reach 672 h, showing better stability and rust prevention performance.

[0190] Compared to N4016 (with a carbon atom content of 40% in the carbon rings) used in Example 14, Example 6 uses a preferred N4016 (with a carbon atom content of 55% in the carbon rings). The resulting rust-preventive oil exhibits a wear resistance of 0.30 mm, a cleanliness level of 5, and better shock absorption performance. It also achieves a wear resistance of 0.30 mm and a damp heat test time of up to 672 hours, demonstrating better stability and rust prevention performance.

[0191] Compared to the ratio of barium sulfonate to calcium sulfonate in Example 15 (7:4), the preferred ratio of barium sulfonate to calcium sulfonate in Example 4 of this invention (10:1) results in an anti-wear oil with a wear resistance of 0.30 mm, a cleanliness level of 5, and better shock absorption performance. The wear resistance can reach 0.30 mm, and the damp heat test time can reach 672 hours, demonstrating better stability and anti-rust properties.

[0192] Compared to Example 16, which did not contain benzotriazole dodecylamine salt (metal deactivator), the metal deactivator added in Example 6 of the present invention can work synergistically with the rust inhibitor. The rust-preventive oil prepared by it can achieve an abrasion resistance of 0.30 mm, a cleanliness level of 5, and better shock absorption performance. The abrasion resistance can reach 0.30 mm, and the damp heat test time can reach 672 h, showing better stability and rust prevention performance.

[0193] Compared to Example 17, which uses an effective sulfonate content of less than 50%, Example 6 of the present invention uses a preferred effective sulfonate content, and the rust-preventive oil prepared therefrom has an wear resistance of 0.30 mm, a cleanliness level of 5, and better shock absorption performance; the wear resistance can reach 0.30 mm, the damp heat test time can reach 672 h, and it has better stability and rust prevention performance.

[0194] Compared to Comparative Example 2, which uses only mineral oil as the base oil, Example 5 of this invention uses a combination of mineral oil and naphthenic oil as the base oil. The resulting rust-preventive oil has an anti-wear performance of 0.30 mm, a cleanliness level of 5, and better shock absorption performance. It also has an anti-wear performance of 0.30 mm and a damp heat test time of up to 672 hours, exhibiting better stability and rust prevention performance.

[0195] Compared to Comparative Example 3, which uses only mineral oil as the base oil and barium sulfonate as the rust inhibitor, Example 3 uses a combination of mineral oil and naphthenic oil as the base oil and a combination of barium sulfonate and zinc naphthenate as the rust inhibitor. The prepared rust-preventive oil has an anti-wear performance of 0.30 mm, a cleanliness level of 5, and better shock absorption performance. The anti-wear performance can reach 0.30 mm, and the damp heat test time can reach 672 h, showing better stability and rust prevention performance.

[0196] Compared to Comparative Example 4, which uses only naphthenic oil as the base oil, Example 6 of this invention uses a combination of mineral oil and naphthenic oil as the base oil. The resulting rust-preventive oil has an anti-wear performance of 0.30 mm, a cleanliness level of 5, and better shock absorption performance. It also has an anti-wear performance of 0.30 mm and a damp heat test time of up to 672 hours, demonstrating better stability and rust prevention performance.

[0197] Compared to Comparative Example 5, which used 94 parts by weight of base oil, 21 parts by weight of rust inhibitor, and 5 parts by weight of additives, Example 6 of this invention uses a preferred combination of components. The rust-preventive oil prepared has an anti-wear performance of 0.30 mm, a cleanliness level of 5, and better shock absorption performance. It also has an anti-wear performance of 0.30 mm and a damp heat test time of up to 672 hours, exhibiting better stability and rust prevention performance.

[0198] Compared to Comparative Example 6, which uses a single mineral oil as the base oil, Example 6 uses a preferred mineral oil and naphthenic oil as the base oil. The rust-preventive oil prepared in this example has an anti-wear performance of 0.30 mm, a cleanliness level of 5, and better shock absorption performance. The anti-wear performance can reach 0.30 mm, and the damp heat test time can reach 672 h, showing better stability and rust prevention performance.

[0199] Compared with Comparative Example 1 which uses the prior art, the rust-preventive oil prepared using the preferred technical solution of the present invention in Examples 6-8 has a wear resistance of 0.30 mm, a cleanliness level of 5, and better shock absorption performance; the wear resistance can reach 0.30 mm, and the damp heat test time can reach 672 h, showing better stability and rust prevention performance.

[0200] It should be noted that the embodiments described above are only for explaining the present invention and do not constitute any limitation on the present invention. The present invention has been described with reference to typical embodiments, but it should be understood that the words used therein are descriptive and explanatory terms, not limiting terms. Modifications can be made to the present invention within the scope of the claims, and revisions can be made to the present invention without departing from the scope and spirit of the present invention. Although the present invention described herein relates to specific methods, materials, and embodiments, it does not mean that the present invention is limited to the specific examples disclosed herein; on the contrary, the present invention can be extended to all other methods and applications with the same function.

Claims

1. A composition for use as a rust-preventive oil, characterized in that, The raw materials of the composition include 65-90 parts by weight of base oil; 6-20 parts by weight of rust inhibitor and 0.5-3 parts by weight of additives; The base oils include mineral oils and naphthenic oils.

2. The composition according to claim 1, characterized in that, The composition comprises 70-90 parts by weight of base oil; and / or, the composition comprises 8-18 parts by weight of rust inhibitor; and / or, the composition comprises 0.5-2 parts by weight of additives.

3. The composition according to claim 1 or 2, characterized in that, The amount of mineral oil used is 20-70 parts by weight, preferably 30-65 parts by weight, and more preferably 40-55 parts by weight; And / or, the amount of the naphthenic oil is 20-50 parts by weight, preferably 25-40 parts by weight, more preferably 35-40 parts by weight; And / or, the amount of the rust inhibitor is 6-20 parts by weight, preferably 8-16 parts by weight; And / or, the amount of the adjuvant is 0.5-3 parts by weight, preferably 0.5-2 parts by weight.

4. The composition according to any one of claims 1-3, characterized in that, The viscosity index of the mineral oil is >80, preferably >90; Preferably, the mineral oil is selected from one or more of HVI 75, HVI 100, HVI 125, HVI 150, HVI 500, HVI 650, HVI120BS, HVI 150BS, HVI II-2, and HVI II-4, and more preferably from one or more of HVI 150, HVI 500, HVI120BS, and HVI 150BS.

5. The composition according to any one of claims 1-4, characterized in that, Based on the total number of carbon atoms in the cycloalkyl oil, the carbon atom content of the carbon ring in the cycloalkyl oil is 50%-100%, more preferably 50%-70%; Preferably, the naphthenic oil is selected from N4010 and / or N4016, more preferably N4016.

6. The composition according to any one of claims 1-5, characterized in that, The rust inhibitor is selected from sulfonates and / or naphthenates; Preferably, the rust inhibitor is composed of sulfonate and naphthenate; Preferably, the amount of the sulfonate is 10-18 parts by weight, more preferably 10-13 parts by weight; the amount of the naphthenate is 0.5-3 parts by weight, more preferably 0.5-2 parts by weight. Preferably, the sulfonate is selected from calcium sulfonate salts and / or barium sulfonate salts; Preferably, the sulfonate is composed of calcium sulfonate and barium sulfonate; Preferably, the amount of barium sulfonate is 8-15 parts by weight, more preferably 9-13 parts by weight; the amount of calcium sulfonate is 0.2-2 parts by weight, more preferably 0.2-1 parts by weight.

7. The composition according to claim 6, characterized in that, The barium sulfonate salt is selected from petroleum barium sulfonate and / or synthetic barium sulfonate; Preferably, the synthesized barium sulfonate is selected from barium alkylbenzene sulfonate and / or barium dinonylnaphthalene sulfonate; And / or, the calcium sulfonate salt is selected from petroleum calcium sulfonate and / or low-base synthetic calcium sulfonate, preferably low-base synthetic calcium sulfonate.

8. The composition according to claim 6 or 7, characterized in that, The alkalinity of the sulfonate is ≤40 mg KOH / g, preferably 2-30 mg KOH / g; And / or, the effective sulfonate content of the sulfonate is ≥50%, preferably 55-70%; And / or, the number of carbon rings in the cycloalkanoate is 1-6, preferably 2-3; Preferably, the cycloalkanoate comprises at least one of a five-carbon ring and a six-carbon ring; more preferably, it is a six-carbon ring. Preferably, the naphthenate is selected from zinc naphthenate and / or sodium naphthenate, and more preferably zinc naphthenate.

9. The composition according to any one of claims 1-8, characterized in that, The additives include anti-wear agents and / or metal deactivators; Preferably, the additive is composed of an anti-wear agent and a metal deactivator; Preferably, the amount of the anti-wear agent is 0.2-1 parts by weight, more preferably 0.5-1 parts by weight; the amount of the metal deactivator is 0.02-1 parts by weight, more preferably 0.05-1 parts by weight. Preferably, the anti-wear agent is selected from at least one of di-n-butyl phosphite, tricresyl phosphate, and phenyl thiophosphate; Preferably, the metal deactivator is selected from benzotriazole dodecylamine salt and / or 2-mercaptobenzothiazole.

10. A method for preparing the composition for rust-preventive oil according to any one of claims 1-9, characterized in that, The method includes: Step (1): Mix the base oils thoroughly; Step (2): Add rust inhibitor and additives to the well-mixed base oil, mix well, and obtain the composition described above; The base oils include mineral oils and naphthenic oils.

11. The preparation method according to claim 10, characterized in that, The method of mixing evenly in step (1) includes stirring at 60-75℃ for 1-2 hours; And / or, the mixing method in step (2) includes stirring at 60-75°C for 2-3 hours.

12. The preparation method according to claim 10 or 11, characterized in that, The method further includes step (3): filtering the composition obtained in step (2), preferably filtering with a pore size of 2-10 μm.

13. A rust-preventive oil, characterized in that, The rust-preventive oil comprises the composition of any one of claims 1-9 or the composition prepared by the preparation method of any one of claims 10-12.

14. The application of the rust-preventive oil of claim 13 in the rust prevention of bearings or gears.

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