A long-life motorcycle shock absorber oil composition and its preparation method and application

Abstract

The present application relates to the technical field of shock absorber oil, and particularly relates to a long-life motorcycle shock absorber oil composition, a preparation method and application thereof. The shock absorber oil composition comprises the following components in percentage by weight: 0.4-4.7% of an anti-wear agent, 0.08-1.7% of an antioxidant; the anti-wear agent is a combination of butyl triphenyl phosphorothioate and a phosphorothioate complex ammonium salt; the antioxidant is a mixture of three components of alkyl diphenylamine, 2,6-di-tert-butyl mixed phenol and alkylated phenyl alpha-naphthylamine. The product has outstanding viscosity-temperature characteristics (a viscosity index greater than 150), excellent low-temperature performance (a pour point not higher than -45 DEG C without adding a pour point depressant), excellent friction-reducing and anti-wear performance, and good anti-oxidation and anti-rust performance. The product can be used for front and rear shock absorption of a motorcycle, and has a wide range of applications.

Description

Technical Field

[0001] The present invention relates to the technical field of shock absorber oil, in particular to a long-life motorcycle shock absorber oil composition and a preparation method and application thereof. Background Art

[0002] Motorcycle shock absorbers are key components of the vehicle, providing elastic support for the vehicle's load-bearing capacity and mass. The resistance created by the reciprocating flow of shock absorber oil through the damping orifice dampens vibrations caused by uneven roads on the vehicle body and frame, reducing the inertial forces acting on the vehicle body and converting vibrational energy into heat, which is dissipated into the environment. Motorcycle shock absorbers are categorized as front or rear shock absorbers based on their mounting location.

[0003] While researchers at home and abroad have made significant progress in motorcycle shock absorber oils, some technical deficiencies remain. For example, Chinese patent CN 102329683 B discloses a motorcycle shock absorber oil composition and its preparation method. This oil exhibits excellent low-temperature performance but only moderate antioxidant properties. Summary of the Invention

[0004] The present invention provides a long-life motorcycle shock absorber oil composition and a preparation method and application thereof, so as to solve the defect that shock absorber oil in the prior art cannot meet application requirements, and provide a motorcycle shock absorber oil with outstanding antioxidant performance, viscosity-temperature performance, excellent low-temperature performance, good anti-foaming performance, good antioxidant and rust-proof performance, and excellent anti-wear performance.

[0005] The present invention provides a shock absorber oil composition, which comprises the following components in percentage by weight: 0.4-4.7% (preferably 0.6-4.5%) of an anti-wear agent and 0.08-1.7% (0.1-1.5%) of an antioxidant.

[0006] The anti-wear agent is a combination of butyl triphenyl thiophosphate (IR232) and thiophosphate complex ammonium salt (T307).

[0007] Preferably, butyl triphenyl thiophosphate antiwear agent (IR232) and thiophosphate complex ammonium salt (T307) are compounded in a weight ratio of 1.5-2.5:0.5-1.5; more preferably, butyl triphenyl thiophosphate antiwear agent and thiophosphate complex ammonium salt are compounded in a weight ratio of 1.8-2.2:0.8-1.2; further preferably, butyl triphenyl thiophosphate antiwear agent (IR232) and thiophosphate complex ammonium salt (T307) are compounded in a weight ratio of 2:1; in order to achieve excellent extreme pressure and anti-wear properties, the present invention utilizes the synergistic effect between the additives.

[0008] The antioxidant is a mixture of three components: alkyl diphenylamine (KT5534), 2,6-di-tert-butyl mixed phenol (KT5135), and alkylated phenyl α-naphthylamine (L06).

[0009] It is preferred to utilize high purity alkylated phenyl α-naphthylamine.

[0010] Preferably, the weight ratio of alkyldiphenylamine (KT5534), 2,6-di-tert-butyl mixed phenol (KT5135), and alkylated phenyl α-naphthylamine (L06) in the antioxidant is 3.5-4.5:3.5-4.5:1.5-2.5; more preferably, the weight ratio of alkyldiphenylamine, 2,6-di-tert-butyl mixed phenol, and alkylated phenyl α-naphthylamine in the antioxidant is 3.8-4.2:3.8-4.2:1.8-2.2; further preferably, the weight ratio of alkyldiphenylamine (KT5534), 2,6-di-tert-butyl mixed phenol (KT5135), and high-purity alkylated phenyl α-naphthylamine (L06) in the antioxidant is 4:4:2; in order to extend the service life of the shock absorber oil, the antioxidant of the present invention adopts amine phenol and further reinforces the naphthylamine antioxidant to control the formation of insoluble matter. The shock absorber oil composition prepared by using the antioxidant and anti-wear agent of the present invention not only has very good antioxidant performance and prolonged service life, but also has excellent extreme pressure and wear resistance.

[0011] According to the shock absorber oil composition provided by the present invention, the shock absorber oil composition further comprises one or more of a rust inhibitor, an anti-emulsifier, and an anti-foaming agent.

[0012] Preferably, the rust inhibitor is n-oleyl sarcosine; further preferably, the shock absorber oil composition comprises 0.02 to 1.4%, preferably 0.02 to 1.2% of the rust inhibitor.

[0013] Alternatively, the demulsifier is an alkylphenol polyoxyethylene ether formaldehyde copolymer, and the shock absorber oil composition comprises 0.003 to 0.03%, preferably 0.005 to 0.02% of the demulsifier.

[0014] Alternatively, the antifoaming agent is a silicon-based antifoaming agent; further preferably, the shock absorber oil composition comprises 0.002 to 0.095% of the antifoaming agent, preferably 0.003 to 0.080%.

[0015] Preferably, the rust inhibitor is n-oleyl sarcosine (Sarkosyl O). The rust inhibitor used in the present invention, n-oleyl sarcosine (Sarkosyl O), can prevent rust on the shock absorber's metal components caused by water ingress into the oil. If the rust inhibitor is insufficient, it will not provide corrosion protection, while if the proportion is too high, it will antagonize the anti-wear agent, reducing anti-wear performance.

[0016] Preferably, the demulsifier is alkylphenol polyoxyethylene ether formaldehyde copolymer (BASOROL P DB-9935); the use of a demulsifier can reduce the risk of emulsification after a small amount of water enters the shock absorber oil.

[0017] Preferably, the antifoaming agent is silicone antifoaming agent BAN 159. The use of an antifoaming agent in the present invention can improve the antifoaming performance of the shock absorber and reduce phenomena such as detonation. Insufficient antifoaming agent can affect foam properties and cause severe hysteresis. Excessive addition can severely affect the air release characteristics of the product.

[0018] According to the shock absorber oil composition provided by the present invention, the shock absorber oil composition further comprises a base oil;

[0019] The base oil is one or more of ES 2813 base oil, polyalphaolefin base oil and coal-to-liquid base oil.

[0020] Preferably, the shock absorber oil composition comprises 1.5-10% of ES 2813 base oil, preferably 2.0-9.0%.

[0021] Preferably, the PAO base oil (poly alpha olefin base oil) is pure decene PAO6 and / or PAO8 produced using C10 olefin as raw material.

[0022] Preferably, the CTL base oil (coal-to-liquid base oil) is one or a mixture of CTL6 and CTL8.

[0023] The shock absorber oil composition provided by the present invention is composed of the following components in percentage by weight:

[0024]

[0025]

[0026] The shock absorber oil composition of the present invention has outstanding antioxidant properties, viscosity-temperature performance, excellent low-temperature performance, excellent anti-foaming properties, good anti-oxidation and anti-rust properties, and excellent anti-wear properties when used in motorcycle shock absorbers. It can meet the all-weather and long-life requirements of motorcycle shock absorbers and is suitable for export.

[0027] In the present invention, the PAO base oil can be pure decene PAO6 and PAO8 produced by Maoming Petrochemical using C10 olefin as raw material; the CTL base oil can be a mixture of one or more of CTL6 and CTL8 produced by Lu'an Group.

[0028] The present invention provides a shock absorber oil composition, which is composed of the following components in percentage by weight: 3% CTL8, 2.0% ES 2813 base oil, 2.8% butyl triphenyl thiophosphate (IR232), 1.4% thiophosphate complex ammonium salt (T307), 0.32% alkyl diphenylamine (KT5534), 0.32% 2,6-di-tert-butyl mixed phenol (KT5515), 0.16% high-purity alkylated phenyl α-naphthylamine (L06), 0.8% oleyl sarcosine (Sarkosyl O), 0.01% alkylphenol polyoxyethylene ether formaldehyde copolymer (BASOROL P DB-9935), 0.003% silicone antifoaming agent (BAN159), and the balance is CTL6.

[0029] The present invention provides a shock absorber oil composition, which is composed of the following components in percentage by weight: 5.2% of PAO8, 40% of CTL6, 6.0% of ES 2813 base oil, 1.8% of butyl triphenyl thiophosphate (IR232), 0.9% of ammonium salt of phosphorothioate complex (T307), 0.04% of alkyl diphenylamine (KT5534), 0.04% of 2,6-di-tert-butyl mixed phenol (KT5515), 0.02% of high-purity alkylated phenyl α-naphthylamine (L06), 1.2% of n-oleyl sarcosine (Sarkosyl O), 0.02% of alkylphenol polyoxyethylene ether formaldehyde copolymer (BASOROL P DB-9935), 0.040% of silicone antifoaming agent (BAN159), and the balance is PAO6.

[0030] The present invention provides a shock absorber oil composition, which is composed of the following components in percentage by weight: 7.5% of PAO8, 8.0% of ES 2813 base oil, 0.4% of butyl triphenyl thiophosphate (IR232), 0.2% of ammonium salt of phosphorothioate complex (T307), 0.48% of alkyl diphenylamine (KT5534), 0.48% of 2,6-di-tert-butyl mixed phenol (KT5515), 0.24% of high-purity alkylated phenyl α-naphthylamine (L06), 0.2% of n-oleyl sarcosine (Sarkosyl O), 0.005% of alkylphenol polyoxyethylene ether formaldehyde copolymer (BASOROL P DB-9935), 0.080% of silicone antifoaming agent (BAN159), and the balance is PAO6.

[0031] The present invention provides a shock absorber oil composition, which is composed of the following components in percentage by weight: 4.5% ES2813 base oil, 1.4% butyl triphenyl thiophosphate (IR232), 0.7% thiophosphate complex ammonium salt (T307), 0.6% alkyl diphenylamine (KT5534), 0.6% 2,6-di-tert-butyl mixed phenol (KT5515), 0.3% high-purity alkylated phenyl α-naphthylamine (L06), 0.05% n-oleyl sarcosine (Sarkosyl O), 0.015% alkylphenol polyoxyethylene ether formaldehyde copolymer (BASOROL P DB-9935), 0.020% silicone antifoaming agent (BAN159), and the balance PAO8.

[0032] The present invention provides a shock absorber oil composition, which is composed of the following components in percentage by weight: 37% of PAO8, 9.0% of ES 2813 base oil, 0.8% of butyl triphenyl thiophosphate (IR232), 0.4% of thiophosphate complex ammonium salt (T307), 0.2% of alkyl diphenylamine (KT5534), 0.2% of 2,6-di-tert-butyl mixed phenol (KT5515), 0.1% of high-purity alkylated phenyl α-naphthylamine (L06), 0.5% of n-oleyl sarcosine (Sarkosyl O), 0.009% of alkylphenol polyoxyethylene ether formaldehyde copolymer (BASOROL P DB-9935), 0.06% of silicone antifoaming agent (BAN159), and the balance is CTL8.

[0033] The present invention provides a shock absorber oil composition, which is composed of the following components in percentage by weight: 7.2% of ES2813 base oil, 3.0% of butyl triphenyl thiophosphate (IR232), 1.5% of thiophosphate complex ammonium salt (T307), 0.4% of alkyl diphenylamine (KT5534), 0.4% of 2,6-di-tert-butyl mixed phenol (KT5515), 0.2% of high-purity alkylated phenyl α-naphthylamine (L06), 1.0% of n-oleyl sarcosine (Sarkosyl O), 0.018% of alkylphenol polyoxyethylene ether formaldehyde copolymer (BASOROL P DB-9935), 0.01% of silicone antifoaming agent (BAN159), and the balance is CTL8.

[0034] The present invention provides a method for preparing the shock absorber oil composition. The method comprises adding various raw material components into a blending kettle and stirring the mixture at 55-65° C. for 2-3 hours.

[0035] The present invention provides a method for preparing the shock absorber oil composition. Alkylated phenyl α-naphthylamine (L06) is dissolved in ES 2813 base oil in advance to obtain a dissolving liquid. Butyl triphenyl thiophosphate (IR232) is diluted in advance with base oil to obtain a diluent. After other additives are added to a blending kettle, the diluent and the dissolving liquid are added, and the mixture is stirred at 55° C. to 65° C. for 2 to 3 hours.

[0036] Beneficial effects of the present invention:

[0037] (1) The shock absorber oil composition of the present invention has a synergistic effect between the anti-wear agents to achieve excellent extreme pressure and anti-wear properties; the antioxidant is matched with aminophenol, and is further supplemented with naphthylamine antioxidant to control the formation of insoluble matter.

[0038] (2) The shock absorber oil composition of the present invention utilizes a fully synthetic base oil and incorporates a variety of functional additives, including anti-wear agents, antioxidants, rust inhibitors, demulsifiers, and anti-foaming agents. This results in the product having outstanding viscosity-temperature characteristics (viscosity index greater than 150), excellent low-temperature performance (pour point no higher than -45°C without the addition of a pour point depressant), excellent friction-reducing and anti-wear properties, and good antioxidant and rust-preventing properties. The product of the present invention can be used for both front and rear shock absorbers of motorcycles and has a wide range of applications.

[0039] (3) The preparation method of the shock absorber oil composition of the present invention has simple preparation steps and is suitable for industrial production. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention are described clearly and completely below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0041] The ES 2813 described in the present invention was purchased from BASF.

[0042] The shock absorber oils of Examples 1-5 of the present invention were prepared according to the formula in Table 1:

[0043] Table 1 Formulations of Examples 1 to 5

[0044]

[0045] The above formula was mixed according to the proportion of each component, and the mixture was stirred at 60° C. for 3 hours to obtain the product.

[0046] Comparative Example 1

[0047] Commercially available motorcycle shock absorber oil products

[0048] Comparative Example 2

[0049] Motorcycle front shock absorber oil composition described in Example 2 of patent CN 102329683B.

[0050] Experimental Example 1

[0051] The performance of the products of Examples 1-6 was tested by using the analysis methods of national or industrial standards, and compared with Comparative Examples 1 and 2. The results are shown in Table 2.

[0052] Table 2 Comparison of product performance data of Examples 1-6 with Comparative Examples

[0053]

[0054]

[0055] Analysis showed that the viscosity index of the shock absorber oil obtained in Examples 1-6 was all above 150, the low temperature kinematic viscosity at No. 32 was all less than 700 mm 2 / s, and the low temperature kinematic viscosity at No. 46 was all less than 1100 mm 2 / s, both of which were significantly better than those of Comparative Examples; in addition, the maximum non-sticking load and rotary oxygen bomb were significantly better than those of Comparative Examples, indicating that the anti-wear property of the product of the present application was better than that of Comparative Examples. The analysis results showed that the long-life motorcycle shock absorber oil of the present application had excellent viscosity-temperature performance and low temperature performance, and was also significantly better than Comparative Examples in lubricating properties and antioxidant life.

[0056] Compared with ordinary motorcycle shock absorber oil, the shock absorber oil of the present application had outstanding viscosity-temperature performance (with excellent shear performance), excellent low temperature performance (with a pour point of less than -45℃), excellent antioxidant performance (long life), excellent anti-foaming performance, and excellent anti-wear performance. The product of the present application can be used for motorcycle front / rear shock absorbers, and can meet the requirements of all-weather, long-life, and general use.

[0057] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that they can still modify the technical solutions described in the foregoing examples, or make equivalent substitutions for part of the technical features; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A shock absorber oil composition, characterized in that: It is composed of the following components in percentage by weight: ES 2813 base oil 2.0-9.0%; Anti-wear agent 0.6~4.5%; Antioxidant 0.1-1.5%; Rust inhibitor 0.02~1.2%; Demulsifier 0.005~0.02%; Antifoaming agent 0.003~0.080%; Balance of polyalphaolefin base oil and / or coal-to-liquid base oil; The anti-wear agent is a combination of butyl triphenyl thiophosphate and thiophosphate complex ester ammonium salt; The butyl triphenyl thiophosphate anti-wear agent and the thiophosphate complex ester ammonium salt are compounded in a weight ratio of 1.5-2.5:0.5-1.5; The antioxidant is a mixture of three components: alkyl diphenylamine, 2,6-di-tert-butyl mixed phenol, and alkylated phenyl α-naphthylamine; The weight ratio of alkyl diphenylamine, 2,6-di-tert-butyl mixed phenol and alkylated phenyl α-naphthylamine in the antioxidant is 3.5-4.5:3.5-4.5:1.5-2.

5.

2. The shock absorber oil composition according to claim 1, characterized in that The butyl triphenyl thiophosphate anti-wear agent and the thiophosphate complex ester ammonium salt are compounded in a weight ratio of 1.8-2.2:0.8-1.2; Or, the alkylated phenyl α-naphthylamine is a high-purity alkylated phenyl α-naphthylamine; The weight ratio of alkyl diphenylamine, 2,6-di-tert-butyl mixed phenol and alkylated phenyl α-naphthylamine in the antioxidant is 3.8-4.2:3.8-4.2:1.8-2.

2.

3. The shock absorber oil composition according to claim 1 or 2, characterized in that: Butyl triphenyl thiophosphate anti-wear agent and thiophosphate complex ester ammonium salt are compounded in a weight ratio of 2:1; And / or, the weight ratio of alkyl diphenylamine, 2,6-di-tert-butyl mixed phenol and alkylated phenyl α-naphthylamine in the antioxidant is 4:4:

2.

4. The shock absorber oil composition according to claim 1 or 2, characterized in that: The rust inhibitor is n-oleyl sarcosine; Or, the demulsifier is an alkylphenol polyoxyethylene ether type formaldehyde copolymer; Alternatively, the antifoaming agent is a silicon-based antifoaming agent.

5. The shock absorber oil composition according to any one of claims 1 to 2, characterized in that: The polyalphaolefin base oil is pure decene PAO6 and / or PAO8 produced using C10 olefin as raw material; Alternatively, the coal-to-liquid base oil is one or a mixture of CTL6 and CTL8.

6. The shock absorber oil composition according to claim 4, wherein It is composed of the following components in percentage by weight: 3% CTL8, 2.0% ES 2813 base oil, 2.8% butyl triphenylthiophosphate, 1.4% ammonium salt of phosphorothioate complex, 0.32% alkyl diphenylamine, 0.32% 2,6-di-tert-butyl mixed phenol, 0.16% high-purity alkylated phenyl α-naphthylamine, 0.8% n-oleyl sarcosine, 0.01% alkylphenol polyoxyethylene ether formaldehyde copolymer, 0.003% silicon antifoaming agent, and the balance is CTL6; Or, it is composed of the following components in percentage by weight: PAO8 5.2%, CTL6 40%, ES 2813 base oil 6.0%, butyl triphenyl thiophosphate 1.8%, phosphorothioate complex ammonium salt 0.9%, alkyl diphenylamine 0.04%, 2,6-di-tert-butyl mixed phenol 0.04%, high-purity alkylated phenyl α-naphthylamine 0.02%, n-oleyl sarcosine 1.2%, alkylphenol polyoxyethylene ether formaldehyde copolymer 0.02%, silicon antifoaming agent 0.040%, and the balance is PAO6; Or, it is composed of the following components in percentage by weight: PAO8 7.5%, ES 2813 base oil 8.0%, butyl triphenyl thiophosphate 0.4%, phosphorothioate complex ammonium salt 0.2%, alkyl diphenylamine 0.48%, 2,6-di-tert-butyl mixed phenol 0.48%, high-purity alkylated phenyl α-naphthylamine 0.24%, n-oleyl sarcosine 0.2%, alkylphenol polyoxyethylene ether formaldehyde copolymer 0.005%, silicon antifoaming agent 0.080%, and the balance is PAO6; Or, it is composed of the following components in percentage by weight: 4.5% ES 2813 base oil, 1.4% butyl triphenylthiophosphate, 0.7% ammonium salt of phosphorothioate complex, 0.6% alkyl diphenylamine, 0.6% 2,6-di-tert-butyl mixed phenol, 0.3% high-purity alkylated phenyl α-naphthylamine, 0.05% n-oleyl sarcosine, 0.015% alkylphenol polyoxyethylene ether formaldehyde copolymer, 0.020% silicon antifoaming agent, and the balance is PAO8; Or, it is composed of the following components in percentage by weight: PAO8 37%, ES 2813 base oil 9.0%, butyl triphenyl thiophosphate 0.8%, thiophosphate complex ammonium salt 0.4%, alkyl diphenylamine 0.2%, 2,6-di-tert-butyl mixed phenol 0.2%, high-purity alkylated phenyl α-naphthylamine 0.1%, n-oleyl sarcosine 0.5%, alkylphenol polyoxyethylene ether formaldehyde copolymer 0.009%, silicon antifoaming agent 0.06%, and the balance is CTL8; Alternatively, it is composed of the following components in percentage by weight: 7.2% ES 2813 base oil, 3.0% butyl triphenylthiophosphate, 1.5% ammonium salt of phosphorothioate complex, 0.4% alkyl diphenylamine, 0.4% 2,6-di-tert-butyl mixed phenol, 0.2% high-purity alkylated phenyl α-naphthylamine, 1.0% n-oleyl sarcosine, 0.018% alkylphenol polyoxyethylene ether formaldehyde copolymer, 0.01% silicon antifoaming agent, and the balance is CTL8.

7. A method for preparing the shock absorber oil composition according to any one of claims 1 to 6, characterized in that: After adding all raw material components into the blending kettle, stir at 55℃-65℃ for 2-3h.

8. The method for preparing the shock absorber oil composition according to claim 7, characterized in that: Alkylated phenyl α-naphthylamine is dissolved in ES 2813 base oil in advance to obtain a dissolving solution, and butyl triphenyl thiophosphate is diluted in advance with base oil to obtain a diluent. After other additives are added to the blending kettle, the above-mentioned diluent and dissolving solution are added and stirred at 55°C-65°C for 2-3 hours.

9. Use of the shock absorber oil composition according to any one of claims 1 to 6 in a shock absorber.

10. The use according to claim 9, characterized in that Used in motorcycle shock absorbers.

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