A gasoline engine oil compound and its preparation method

Abstract

The present invention relates to the technical field of gasoline engine oil compound additives, and particularly to a gasoline engine oil compound additive and a preparation method thereof. The gasoline engine oil compound additive includes: 8-23 parts by weight of zinc dialkyldithiophosphate, 7-12 parts by weight of antioxidant, 0-5 parts by weight of low-base synthetic calcium sulfonate, 13-18 parts by weight of over-based synthetic calcium sulfonate, 3-7 parts by weight of sulfurized alkylphenol calcium, 14-28 parts by weight of monoalkenyl succinimide, 19-36 parts by weight of high molecular weight polyisobutylene succinimide, 0-5 parts by weight of friction improver, and 0-8.5 parts by weight of neutral base oil. The gasoline engine oil compound additive provided by the present invention is suitable for vehicles with a relatively long vehicle age, has excellent anti-wear performance and antioxidant performance, can protect the timing chain and the turbocharger, and also has remarkable detergency and noise reduction performance.

Description

Technical Field

[0001] The present invention relates to the technical field of gasoline engine oil additives, and particularly to a gasoline engine oil additive with excellent detergency and noise reduction performance suitable for use in vehicles with a high vehicle age and a preparation method thereof. Background Art

[0002] At present, existing gasoline engine oil additive products are mainly suitable for vehicles with a vehicle age of 0 - 6 years, and are not suitable for old vehicles with a vehicle age of more than 7 years, even more than 10 years. At the same time, existing gasoline engine oil additive products have problems such as average comprehensive performance or prominent performance in one aspect while poor performance in other aspects.

[0003] Therefore, the present invention provides a gasoline engine oil additive and a preparation method thereof. The gasoline engine oil additive is suitable for vehicles with a relatively long vehicle age, has excellent anti - wear performance and antioxidant performance, and can protect the timing chain and the turbocharger while also having significant detergency and noise reduction performance. Summary of the Invention

[0004] Aiming at the deficiencies of the above - mentioned existing technologies, the present invention aims to provide a gasoline engine oil additive and a preparation method thereof to solve the problems that existing gasoline engine oil additives are mainly suitable for vehicles with a vehicle age of 0 - 6 years, and are not suitable for old vehicles with a vehicle age of more than 7 years, even more than 10 years. At the same time, existing gasoline engine oil additive products have problems such as average comprehensive performance or prominent performance in one aspect while poor performance in other aspects.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] A gasoline engine oil additive, comprising:

[0007] 8 - 23 parts by weight of zinc dialkyldithiophosphate, 7 - 12 parts by weight of antioxidant, 0 - 5 parts by weight of low - base synthetic calcium sulfonate, 13 - 18 parts by weight of over - base synthetic calcium sulfonate, 3 - 7 parts by weight of sulfurized alkylphenol calcium, 14 - 28 parts by weight of mono - olefin succinimide, 19 - 36 parts by weight of high - molecular - weight polyisobutylene succinimide, 0 - 5 parts by weight of friction modifier, 0 - 8.5 parts by weight of neutral base oil.

[0008] Further, the zinc dialkyldithiophosphate is composed of a zinc salt of sulfur - phosphorus bis - octyl primary alkyl and a zinc salt of sulfur - phosphorus di - secondary alkyl mixed in a mass ratio of 3:7.

[0009] Further, the P content in the zinc salt of sulfur - phosphorus bis - octyl primary alkyl is 7.5% - 8.8%, and the P content in the zinc salt of sulfur - phosphorus di - secondary alkyl is 7.5% - 8.7%.

[0010] Further, the gasoline engine oil compound involved in the present invention consists of two components, namely sulfur-phosphorus bis(octylphenyl) zinc salt and sulfur-phosphorus bis(secondary alkyl) zinc salt, and the mass ratio of the two is preferably 3:7. After compounding, a better synergistic effect can be exerted. At the same time, the P content in the sulfur-phosphorus bis(octylphenyl) zinc salt is 7.5%-8.8%, and the P content in the sulfur-phosphorus bis(secondary alkyl) zinc salt is 7.5%-8.7%. Incorporating zinc dialkyldithiophosphate is mainly used to improve the anti-wear performance of gasoline engine oil. At the same time, it can also endow the gasoline engine oil compound with antioxidant and anti-corrosion properties, and can also inhibit the formation of paint film, sludge and ring groove adhesions in vehicle engine oil. On this basis, by compounding sulfur-phosphorus bis(octylphenyl) zinc salt, taking advantage of the characteristics that sulfur-phosphorus bis(octylphenyl) zinc salt is more suitable for working in harsh environments such as high temperature and wear and its excellent anti-wear performance, after the combination of primary and secondary components, a better synergistic effect can be exerted. It can not only inhibit the increase in viscosity caused by high-temperature oxidation of the oil product, but also prevent the wear of cylinders, ring grooves, cams and tappets, and can also prevent the corrosion of bearings.

[0011] Further, the antioxidant includes isooctyl β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate and ethyl 2,2'-thiobis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate] which are mixed in a mass ratio of 4:6.

[0012] Further, the antioxidant involved in the present invention consists of isooctyl β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate and ethyl 2,2'-thiobis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], and the mass ratio of the two is preferably 4:6. After compounding, a better synergistic effect can be exerted, with excellent high-temperature antioxidant property and high-temperature thermal stability, and has a significant effect on inhibiting the late oxidation of the oil product, can delay the oxidative deterioration during the use of the oil, and thus extend the service life of gasoline engine oil.

[0013] Further, the low-base synthetic calcium sulfonate, over-base synthetic calcium sulfonate and sulfurized alkylphenol calcium involved in the present invention are all detergents. After compounding different types and different ratios of detergents, a better cleaning effect can be achieved. Specifically, the main functions of over-base synthetic calcium sulfonate and sulfurized alkylphenol calcium are to neutralize the acidic oxidation products and acidic gums generated by oxidation and incomplete combustion in the oil, and at the same time have excellent high-temperature detergency and thermal stability. Cooperating with low-base synthetic calcium sulfonate can clean the paint film and deposits on the piston surface in time.

[0014] Further, the N content in the monoalkenyl succinimide is 2.1%, and the N content in the high-molecular-weight polyisobutylene succinimide is 1.1%.

[0015] Furthermore, the monoalkenyl succinimide and high molecular weight polyisobutylene succinimide involved in the present invention are both dispersants. Among them, the N content in the monoalkenyl succinimide is 2.1%, and the N content in the high molecular weight polyisobutylene succinimide is 1.1%. The main function of the dispersant is to disperse and solubilize, so that the initial products forming sediments are suspended in the lubricating oil in various ways. Both the monoalkenyl succinimide and the high molecular weight polyisobutylene succinimide are connected with a maleic anhydride on the PIB. The difference is that the molecular weight of the PIB on the high molecular weight polyisobutylene succinimide is large and two maleic anhydrides are connected. When the two are compounded in an appropriate ratio, they have excellent dispersibility and synergistic effect. Moreover, the monoalkenyl succinimide and the high molecular weight polyisobutylene succinimide have good low-temperature dispersibility and high-temperature stability respectively. Their main function is to inhibit the formation of carbon deposits and paint films on the engine pistons, and can effectively control the increase in the viscosity of gasoline engine oils.

[0016] Furthermore, the friction modifier comprises molybdenum dialkyldithiocarbamate, molybdenum oxydialkyldithiocarbamate sulfide and glyceryl oleate, which are mixed in a mass ratio of 1:1:1.

[0017] Furthermore, the friction modifier involved in the present invention is composed of molybdenum dialkyldithiocarbamate, molybdenum oxydialkyldithiocarbamate sulfide and glyceryl oleate. And the mass ratio of the three is preferably 1:1:1. After compounding, they can play a better synergistic effect. The friction modifier has polar groups, and the polar groups have a strong affinity for the metal surface, and can strongly adsorb on the metal surface, and then form a protective film similar to a buffer pad to separate the metals, preventing the metals from directly contacting, thereby reducing friction and wear. In addition to the anti-wear and friction-reducing effects, the friction modifier also has a synergistic antioxidant effect when compounded with other antioxidants.

[0018] As a general technical concept, the present invention also provides a preparation method of a gasoline engine oil compound, which is used to prepare the aforementioned gasoline engine oil compound. The specific steps include:

[0019] Charge into a container according to the mass fraction ratio of the components of the aforementioned gasoline engine oil compound. First, add the antioxidant, zinc dialkyldithiophosphate, friction modifier and neutral base oil, heat up to 60 - 70 °C, stir evenly at 500 - 700 rpm, then add the monoalkenyl succinimide and the high molecular weight polyisobutylene succinimide in sequence, control the temperature to 60 - 65 °C, stir evenly at 500 - 700 rpm, then add calcium sulfonated alkylphenol, overbased synthetic calcium sulfonate and low-base synthetic calcium sulfonate in sequence, keep the temperature at 58 - 62 °C, stir at 500 - 700 rpm for 2 - 3 h, and filter to obtain the gasoline engine oil compound.

[0020] The advantages and beneficial effects of the present invention are as follows:

[0021] 1. The gasoline engine oil compound provided by the present invention can provide better noise reduction performance for old engines, reduce the noise generated by the engine during operation, and thus improve the comfort of the driver and passengers;

[0022] 2. The gasoline engine oil compound provided by the present invention can provide better anti-oxidation performance for automobile engines and can also effectively reduce the generation of acidic products, thereby extending the oil change cycle;

[0023] 3. The gasoline engine oil compound provided by the present invention can provide better anti-wear performance for automobile engines and reduce engine wear to a certain extent;

[0024] 4. The gasoline engine oil compound provided by the present invention can provide better cleaning performance for automobile engines, effectively reduce the generation of paint film and sediment, and thus protect the engine. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below through specific implementation methods. It should be understood that the specific embodiments described here are only used to explain the present invention and are not used to limit the present invention.

[0026] Example 1

[0027] In this embodiment, a gasoline engine oil compound includes: 23 parts by weight of zinc dialkyl dithiophosphate, 12 parts by weight of an antioxidant, 14 parts by weight of super high base synthetic calcium sulfonate, 3 parts by weight of low base synthetic calcium sulfonate, 5 parts by weight of sulfurized alkyl phenol calcium, 16 parts by weight of monoolefin succinimide, 20 parts by weight of high molecular weight polyisobutylene succinimide, 1.5 parts by weight of a friction modifier, and 5.5 parts by weight of a neutral base oil.

[0028] In this embodiment, the dialkyl zinc dithiophosphate is mixed with bis-octyl zinc sulfide and di-secondary zinc sulfide in a mass ratio of 3:7; the P content in the bis-octyl zinc sulfide is 7.5%-8.8%, and the P content in the di-secondary zinc sulfide is 7.5%-8.7%; the antioxidant includes β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate and 2,2'-thiobis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate] in a mass ratio of 4:6; the N content in the monoalkenyl succinimide is 2.1%, and the N content in the high molecular weight polyisobutylene succinimide is 1.1%; the friction modifier includes dialkyl dithiocarbamate molybdenum, sulfurized dialkyl dithiocarbamate oxymolybdenum and oleic acid glyceride in a mass ratio of 1:1:1.

[0029] In this embodiment, the preparation method of the above gasoline engine oil compound specifically includes:

[0030] Add antioxidant, zinc dialkyldithiophosphate, friction modifier, and neutral base oil into the container in sequence, stir and heat up to 60 - 70 °C, and stir until uniform at 500 - 700 rpm; then add monoalkenyl succinimide and high molecular weight polyisobutylene succinimide in sequence, control the temperature to 60 - 65 °C, and stir until uniform at 500 - 700 rpm; then add calcium sulfonated alkylphenol, overbased synthetic calcium sulfonate, and low-base synthetic calcium sulfonate in sequence, maintain the temperature at 58 - 62 °C and the stirring speed at 500 - 700 rpm, stir for 2 - 3 hours, and obtain the gasoline engine oil compound product through filtration.

[0031] Example 2

[0032] In this embodiment, a gasoline engine oil compound includes: 23 parts by weight of zinc dialkyldithiophosphate, 12 parts by weight of antioxidant, 15 parts by weight of overbased synthetic calcium sulfonate, 3 parts by weight of low-base synthetic calcium sulfonate, 5 parts by weight of calcium sulfonated alkylphenol, 17 parts by weight of monoalkenyl succinimide, 19 parts by weight of high molecular weight polyisobutylene succinimide, 1.5 parts by weight of friction modifier, and 4.5 parts by weight of neutral base oil.

[0033] Among them, the mass ratio of sulfur-phosphorus bis(octylphenyl) zinc salt and sulfur-phosphorus bis(sec-alkylphenyl) zinc salt, the P content in sulfur-phosphorus bis(octylphenyl) zinc salt, the P content in sulfur-phosphorus bis(sec-alkylphenyl) zinc salt, the mass ratio of isooctyl β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate and ethyl 2,2'-thiobis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], the N content in monoalkenyl succinimide, the N content in high molecular weight polyisobutylene succinimide, the mass ratio of molybdenum dialkyldithiocarbamate, molybdenum oxydialkyldithiocarbamate, and glycerol oleate are the same as those in Example 1.

[0034] In this embodiment, the preparation method of the above gasoline engine oil compound specifically includes:

[0035] Add antioxidant, zinc dialkyldithiophosphate, friction modifier, and neutral base oil into the container in sequence, stir and heat up to 60 - 70 °C, and stir until uniform at 500 - 700 rpm; then add monoalkenyl succinimide and high molecular weight polyisobutylene succinimide in sequence, control the temperature to 60 - 65 °C, and stir until uniform at 500 - 700 rpm; then add calcium sulfonated alkylphenol, overbased synthetic calcium sulfonate, and low-base synthetic calcium sulfonate in sequence, maintain the temperature at 58 - 62 °C and the stirring speed at 500 - 700 rpm, stir for 2 - 3 hours, and obtain the gasoline engine oil compound product through filtration.

[0036] Example 3

[0037] In this example, a gasoline engine oil compound additive includes: 20 parts by weight of zinc dialkyldithiophosphate, 10 parts by weight of antioxidant, 18 parts by weight of overbased synthetic calcium sulfonate, 3 parts by weight of low-base synthetic calcium sulfonate, 5 parts by weight of sulfurized alkylphenol calcium, 15 parts by weight of monoalkenyl succinimide, 20 parts by weight of high-molecular-weight polyisobutylene succinimide, 2 parts by weight of friction modifier, and 7 parts by weight of neutral base oil.

[0038] Among them, the mass ratio of zinc bis(octyldecyl) dithiophosphate and zinc bis(sec-decyl) dithiophosphate, the P content in zinc bis(octyldecyl) dithiophosphate, the P content in zinc bis(sec-decyl) dithiophosphate, the mass ratio of isooctyl β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate and ethyl 2,2'-thiobis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], the N content in monoalkenyl succinimide, the N content in high-molecular-weight polyisobutylene succinimide, the mass ratio of molybdenum dialkyldithiocarbamate, molybdenum oxydialkyldithiocarbamate and glycerol oleate are the same as those in Example 1.

[0039] In this example, the preparation method of the above gasoline engine oil compound additive specifically includes:

[0040] Add the antioxidant, zinc dialkyldithiophosphate, friction modifier, and neutral base oil into a container in sequence, stir and heat up to 60 - 70 °C, and stir until uniform at 500 - 700 rpm; then add monoalkenyl succinimide and high-molecular-weight polyisobutylene succinimide in sequence, control the temperature to 60 - 65 °C, and stir until uniform at 500 - 700 rpm; then add sulfurized alkylphenol calcium, overbased synthetic calcium sulfonate, and low-base synthetic calcium sulfonate in sequence, maintain the temperature at 58 - 62 °C and the stirring speed at 500 - 700 rpm, stir for 2 - 3 hours, and obtain the gasoline engine oil compound additive product through filtration.

[0041] Example 4

[0042] In this example, a gasoline engine oil compound additive includes: 20 parts by weight of zinc dialkyldithiophosphate, 10 parts by weight of antioxidant, 18 parts by weight of overbased synthetic calcium sulfonate, 5 parts by weight of low-base synthetic calcium sulfonate, 6 parts by weight of sulfurized alkylphenol calcium, 15 parts by weight of monoalkenyl succinimide, 20 parts by weight of high-molecular-weight polyisobutylene succinimide, 2 parts by weight of friction modifier, and 4 parts by weight of neutral base oil.

[0043] Among them, the mass ratio of zinc dialkyl dithiophosphate and zinc bis-secondary alkyl thiophosphate involved in this embodiment, the P content in zinc dialkyl dithiophosphate, the P content in zinc bis-secondary alkyl thiophosphate, the mass ratio of isooctyl β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate and 2,2'-thiobis[ethyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], the N content in monoalkenyl succinimide, the N content in high molecular weight polyisobutylene succinimide, the mass ratio of molybdenum dialkyldithiocarbamate, molybdenum oxydialkyldithiocarbamate and glycerol oleate are all the same as those in Example 1.

[0044] In this embodiment, the preparation method of the above gasoline engine oil compound additive specifically includes:

[0045] Add antioxidant, zinc dialkyl dithiophosphate, friction modifier and neutral base oil into a container, stir and heat up to 60 - 70 °C, and stir until uniform at 500 - 700 rpm; then add monoalkenyl succinimide and high molecular weight polyisobutylene succinimide in sequence, control the temperature to 60 - 65 °C, and stir until uniform at 500 - 700 rpm; then add calcium sulfonated alkylphenol, overbased synthetic calcium sulfonate and low-base synthetic calcium sulfonate in sequence, keep the temperature at 58 - 62 °C and the stirring speed at 500 - 700 rpm, stir for 2 - 3 hours, and obtain the gasoline engine oil compound additive product through filtration.

[0046] Example 5

[0047] In this embodiment, a gasoline engine oil compound additive includes: 18 parts by weight of zinc dialkyl dithiophosphate, 9 parts by weight of antioxidant, 17 parts by weight of overbased synthetic calcium sulfonate, 5 parts by weight of low-base synthetic calcium sulfonate, 7 parts by weight of calcium sulfonated alkylphenol, 16 parts by weight of monoalkenyl succinimide, 19 parts by weight of high molecular weight polyisobutylene succinimide, 1.5 parts by weight of friction modifier, and 7.5 parts by weight of neutral base oil.

[0048] Among them, the mass ratio of zinc dialkyl dithiophosphate and zinc bis-secondary alkyl thiophosphate involved in this embodiment, the P content in zinc dialkyl dithiophosphate, the P content in zinc bis-secondary alkyl thiophosphate, the mass ratio of isooctyl β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate and 2,2'-thiobis[ethyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], the N content in monoalkenyl succinimide, the N content in high molecular weight polyisobutylene succinimide, the mass ratio of molybdenum dialkyldithiocarbamate, molybdenum oxydialkyldithiocarbamate and glycerol oleate are all the same as those in Example 1.

[0049] In this embodiment, the preparation method of the above gasoline engine oil compound additive specifically includes:

[0050] Add antioxidant, zinc dialkyldithiophosphate, friction modifier, and neutral base oil into a container in sequence. Stir and heat up to 60 - 70 °C, and stir at 500 - 700 rpm until homogeneous. Then add monoalkenyl succinimide and high molecular weight polyisobutylene succinimide in sequence, control the temperature to 60 - 65 °C, and stir at 500 - 700 rpm until homogeneous. Then add calcium sulfonated alkylphenol, overbased synthetic calcium sulfonate, and low base number synthetic calcium sulfonate in sequence, maintain the temperature at 58 - 62 °C and the stirring speed at 500 - 700 rpm, and stir for 2 - 3 hours. Filter to obtain the gasoline engine oil compound additive product.

[0051] Example 6

[0052] In this example, a gasoline engine oil compound additive includes: 20 parts by weight of zinc dialkyldithiophosphate, 7 parts by weight of antioxidant, 17 parts by weight of overbased synthetic calcium sulfonate, 4 parts by weight of low base number synthetic calcium sulfonate, 7 parts by weight of calcium sulfonated alkylphenol, 16 parts by weight of monoalkenyl succinimide, 19 parts by weight of high molecular weight polyisobutylene succinimide, 1.5 parts by weight of friction modifier, and 8.5 parts by weight of neutral base oil.

[0053] Among them, the mass ratio of sulfur-phosphorus bis(octylphenyl) zinc salt and sulfur-phosphorus bis(secondary alkylphenyl) zinc salt, the P content in sulfur-phosphorus bis(octylphenyl) zinc salt, the P content in sulfur-phosphorus bis(secondary alkylphenyl) zinc salt, the mass ratio of isooctyl β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate and 2,2'-thiobis[ethyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], the N content in monoalkenyl succinimide, the N content in high molecular weight polyisobutylene succinimide, the mass ratio of molybdenum dialkyldithiocarbamate, molybdenum oxydialkyldithiocarbamate, and glycerol oleate are the same as those in Example 1.

[0054] In this example, the preparation method of the above gasoline engine oil compound additive specifically includes:

[0055] Add antioxidant, zinc dialkyldithiophosphate, friction modifier, and neutral base oil into a container in sequence. Stir and heat up to 60 - 70 °C, and stir at 500 - 700 rpm until homogeneous. Then add monoalkenyl succinimide and high molecular weight polyisobutylene succinimide in sequence, control the temperature to 60 - 65 °C, and stir at 500 - 700 rpm until homogeneous. Then add calcium sulfonated alkylphenol, overbased synthetic calcium sulfonate, and low base number synthetic calcium sulfonate in sequence, maintain the temperature at 58 - 62 °C and the stirring speed at 500 - 700 rpm, and stir for 2 - 3 hours. Filter to obtain the gasoline engine oil compound additive product.

[0056] Example 7

[0057] In this embodiment, a gasoline engine oil compounding agent comprises: 21 parts by weight of zinc dialkyldithiophosphate, 10 parts by weight of an antioxidant, 13 parts by weight of overbased synthetic calcium sulfonate, 5 parts by weight of sulfurized alkylphenol calcium, 14 parts by weight of monoalkenyl succinimide, 36 parts by weight of high molecular weight polyisobutylene succinimide, 0.5 parts by weight of a friction modifier, and 0.5 parts by weight of a neutral base oil.

[0058] Among them, the mass ratio of sulfur-phosphorus bis(octylphenyl) zinc salt and sulfur-phosphorus bis(secondary octylphenyl) zinc salt, the P content in sulfur-phosphorus bis(octylphenyl) zinc salt, the P content in sulfur-phosphorus bis(secondary octylphenyl) zinc salt, the mass ratio of isooctyl β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate and ethyl 2,2'-thiobis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], the N content in monoalkenyl succinimide, the N content in high molecular weight polyisobutylene succinimide, the mass ratio of molybdenum dialkyldithiocarbamate, molybdenum oxydialkyldithiocarbamate and glycerol oleate are the same as those in Example 1.

[0059] In this embodiment, the preparation method of the above gasoline engine oil compounding agent specifically includes:

[0060] Add the antioxidant, zinc dialkyldithiophosphate, friction modifier, and neutral base oil into a container in sequence, stir and heat up to 60 - 70 °C, and stir at 500 - 700 rpm until uniform; then add monoalkenyl succinimide and high molecular weight polyisobutylene succinimide in sequence, control the temperature to 60 - 65 °C, and stir at 500 - 700 rpm until uniform; then add sulfurized alkylphenol calcium, overbased synthetic calcium sulfonate, and low-base synthetic calcium sulfonate in sequence, maintain the temperature at 58 - 62 °C and the stirring speed at 500 - 700 rpm, stir for 2 - 3 hours, and obtain the gasoline engine oil compounding agent product through filtration.

[0061] Example 8

[0062] In this embodiment, a gasoline engine oil compounding agent comprises: 20 parts by weight of zinc dialkyldithiophosphate, 11 parts by weight of an antioxidant, 13 parts by weight of overbased synthetic calcium sulfonate, 4 parts by weight of sulfurized alkylphenol calcium, 21 parts by weight of monoalkenyl succinimide, and 30 parts by weight of high molecular weight polyisobutylene succinimide.

[0063] Among them, the mass ratio of zinc salt of bis(octylphenyl)phosphorothioate and zinc salt of bis(sec-alkylphenyl)phosphorothioate involved in this example, the P content in zinc salt of bis(octylphenyl)phosphorothioate, the P content in zinc salt of bis(sec-alkylphenyl)phosphorothioate, the mass ratio of isooctyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate and ethyl 2,2'-thiobis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], the N content in monoalkenyl succinimide, the N content in high molecular weight polyisobutylene succinimide, the mass ratio of molybdenum dialkyldithiocarbamate, molybdenum oxydialkyldithiocarbamate and glycerol oleate are all the same as those in Example 1.

[0064] In this example, the preparation method of the above gasoline engine oil compound additive specifically includes:

[0065] Add antioxidants and zinc dialkyldithiophosphate into a container in sequence, stir and heat up to 60 - 70 °C, and stir until uniform at 500 - 700 rpm; then add monoalkenyl succinimide and high molecular weight polyisobutylene succinimide in sequence, control the temperature to 60 - 65 °C, and stir until uniform at 500 - 700 rpm; then add calcium sulfonated alkylphenate, overbased synthetic calcium sulfonate and low-base synthetic calcium sulfonate in sequence, keep the temperature at 58 - 62 °C and the stirring speed at 500 - 700 rpm, stir for 2 - 3 hours, and obtain the gasoline engine oil compound additive product through filtration.

[0066] Example 9

[0067] In this example, a gasoline engine oil compound additive includes: 18 parts by weight of zinc dialkyldithiophosphate, 9 parts by weight of antioxidant, 17 parts by weight of overbased synthetic calcium sulfonate, 3 parts by weight of low-base synthetic calcium sulfonate, 3 parts by weight of calcium sulfonated alkylphenate, 19 parts by weight of monoalkenyl succinimide, 25 parts by weight of high molecular weight polyisobutylene succinimide, 4 parts by weight of friction modifier, and 1 part by weight of neutral base oil.

[0068] Among them, the mass ratio of zinc salt of bis(octylphenyl)phosphorothioate and zinc salt of bis(sec-alkylphenyl)phosphorothioate involved in this example, the P content in zinc salt of bis(octylphenyl)phosphorothioate, the P content in zinc salt of bis(sec-alkylphenyl)phosphorothioate, the mass ratio of isooctyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate and ethyl 2,2'-thiobis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate], the N content in monoalkenyl succinimide, the N content in high molecular weight polyisobutylene succinimide, the mass ratio of molybdenum dialkyldithiocarbamate, molybdenum oxydialkyldithiocarbamate and glycerol oleate are all the same as those in Example 1.

[0069] In this example, the preparation method of the above gasoline engine oil compound additive specifically includes:

[0070] Add antioxidant, zinc dialkyldithiophosphate, friction modifier, and neutral base oil into a container in sequence, stir and heat up to 60 - 70 °C, and stir at 500 - 700 rpm until homogeneous; then add monoalkenyl succinimide and high molecular weight polyisobutylene succinimide in sequence, control the temperature to 60 - 65 °C, and stir at 500 - 700 rpm until homogeneous; then add calcium sulfonated alkylphenol, overbased synthetic calcium sulfonate, and low base synthetic calcium sulfonate in sequence, maintain the temperature at 58 - 62 °C and the stirring speed at 500 - 700 rpm, stir for 2 - 3 hours, and obtain a gasoline engine oil compound product through filtration.

[0071] Example 10

[0072] In this example, a gasoline engine oil compound includes: 20 parts by weight of zinc dialkyldithiophosphate, 7 parts by weight of antioxidant, 18 parts by weight of overbased synthetic calcium sulfonate, 3 parts by weight of low base synthetic calcium sulfonate, 4 parts by weight of calcium sulfonated alkylphenol, 18 parts by weight of monoalkenyl succinimide, 24 parts by weight of high molecular weight polyisobutylene succinimide, and 5 parts by weight of friction modifier.

[0073] Among them, the mass ratio of sulfur - phosphorus bis - octyl primary zinc salt and sulfur - phosphorus bis - secondary zinc salt, the P content in sulfur - phosphorus bis - octyl primary zinc salt, the P content in sulfur - phosphorus bis - secondary zinc salt, the mass ratio of isooctyl β - (3,5 - di - tert - butyl - 4 - hydroxyphenyl) propionate and 2,2'-thiobis[ethyl 3 - (3,5 - di - tert - butyl - 4 - hydroxyphenyl) propionate], the N content in monoalkenyl succinimide, the N content in high molecular weight polyisobutylene succinimide, the mass ratio of molybdenum dialkyldithiocarbamate, molybdenum oxydialkyldithiocarbamate sulfide, and glycerol oleate are the same as those in Example 1.

[0074] In this example, the preparation method of the above - mentioned gasoline engine oil compound specifically includes:

[0075] Add antioxidant, zinc dialkyldithiophosphate, friction modifier into a container in sequence, stir and heat up to 60 - 70 °C, and stir at 500 - 700 rpm until homogeneous; then add monoalkenyl succinimide and high molecular weight polyisobutylene succinimide in sequence, control the temperature to 60 - 65 °C, and stir at 500 - 700 rpm until homogeneous; then add calcium sulfonated alkylphenol, overbased synthetic calcium sulfonate, and low base synthetic calcium sulfonate in sequence, maintain the temperature at 58 - 62 °C and the stirring speed at 500 - 700 rpm, stir for 2 - 3 hours, and obtain a gasoline engine oil compound product through filtration.

[0076] Comparative Example 1

[0077] In this comparative example, a gasoline engine oil compound additive comprises: 25 parts by weight of zinc dialkyldithiophosphate, 5 parts by weight of antioxidant, 14 parts by weight of overbased synthetic calcium sulfonate, 5 parts by weight of low-base synthetic calcium sulfonate, 5 parts by weight of sulfurized alkylphenol calcium, 20 parts by weight of monoalkenyl succinimide, 20 parts by weight of high molecular weight polyisobutylene succinimide, 1.5 parts by weight of friction modifier, and 4.5 parts by weight of neutral base oil.

[0078] Among them, the mass ratio of sulfur-phosphorus dioctyl primary alkyl zinc salt and sulfur-phosphorus di-secondary alkyl zinc salt, the P content in sulfur-phosphorus dioctyl primary alkyl zinc salt, the P content in sulfur-phosphorus di-secondary alkyl zinc salt, the mass ratio of isooctyl β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate and 2,2'-thiobis [3-(3,5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate], the N content in monoalkenyl succinimide, the N content in high molecular weight polyisobutylene succinimide, the mass ratio of molybdenum dialkyldithiocarbamate, sulfurized molybdenum dialkyldithiocarbamate oxide and glycerol oleate are the same as those in Example 4.

[0079] Among them, the preparation method involved in this comparative example is the same as that in Example 4. The main difference from Example 4 is that the ratios of zinc dialkyldithiophosphate, antioxidant, overbased synthetic calcium sulfonate and monoalkenyl succinimide are changed.

[0080] Comparative Example 2

[0081] In this comparative example, a gasoline engine oil compound additive comprises: 15 parts by weight of zinc dialkyldithiophosphate, 16 parts by weight of antioxidant, 15 parts by weight of overbased synthetic calcium sulfonate, 5 parts by weight of low-base synthetic calcium sulfonate, 6 parts by weight of sulfurized alkylphenol calcium, 18 parts by weight of monoalkenyl succinimide, 20 parts by weight of high molecular weight polyisobutylene succinimide, 1.5 parts by weight of friction modifier, and 3.5 parts by weight of neutral base oil.

[0082] Among them, the mass ratio of sulfur-phosphorus dioctyl primary alkyl zinc salt and sulfur-phosphorus di-secondary alkyl zinc salt, the P content in sulfur-phosphorus dioctyl primary alkyl zinc salt, the P content in sulfur-phosphorus di-secondary alkyl zinc salt, the mass ratio of isooctyl β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate and 2,2'-thiobis [3-(3,5-di-tert-butyl-4-hydroxyphenyl) ethyl propionate], the N content in monoalkenyl succinimide, the N content in high molecular weight polyisobutylene succinimide, the mass ratio of molybdenum dialkyldithiocarbamate, sulfurized molybdenum dialkyldithiocarbamate oxide and glycerol oleate are the same as those in Example 4.

[0083] Among them, the preparation method involved in this comparative example is the same as that of Example 4. The main difference from Example 4 is that the ratios of zinc dialkyldithiophosphate, antioxidant, and overbased synthetic calcium sulfonate are changed.

[0084] Comparative Example 3

[0085] In this comparative example, a gasoline engine oil compound additive comprises: 21 parts by weight of zinc dialkyldithiophosphate, 11 parts by weight of antioxidant, 19 parts by weight of overbased synthetic calcium sulfonate, 5 parts by weight of low-base synthetic calcium sulfonate, 4 parts by weight of sulfurized alkylphenol calcium, 20 parts by weight of monoalkenyl succinimide, and 20 parts by weight of high molecular weight polyisobutylene succinimide.

[0086] Among them, the mass ratio of sulfur-phosphorus dioctyl primary zinc salt and sulfur-phosphorus di-secondary zinc salt, the P content in sulfur-phosphorus dioctyl primary zinc salt, the P content in sulfur-phosphorus di-secondary zinc salt, the mass ratio of isooctyl β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate and 2,2'-thiobis[ethyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], the N content in monoalkenyl succinimide, the N content in high molecular weight polyisobutylene succinimide, the mass ratio of molybdenum dialkyldithiocarbamate, sulfurized molybdenum dialkyldithiocarbamate oxide, and glycerol oleate are all the same as those in Example 10.

[0087] Among them, the preparation method involved in this comparative example is the same as that of Example 10. The main difference from Example 10 is that the ratios of antioxidant and monoalkenyl succinimide are changed and the friction reducer is removed.

[0088] Comparative Example 4

[0089] In this comparative example, a gasoline engine oil compound additive comprises: 22 parts by weight of zinc dialkyldithiophosphate, 15 parts by weight of antioxidant, 18 parts by weight of overbased synthetic calcium sulfonate, 5 parts by weight of low-base synthetic calcium sulfonate, 5 parts by weight of sulfurized alkylphenol calcium, 15 parts by weight of monoalkenyl succinimide, and 20 parts by weight of high molecular weight polyisobutylene succinimide.

[0090] Among them, the mass ratio of sulfur-phosphorus dioctyl primary zinc salt and sulfur-phosphorus di-secondary zinc salt, the P content in sulfur-phosphorus dioctyl primary zinc salt, the P content in sulfur-phosphorus di-secondary zinc salt, the mass ratio of isooctyl β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate and 2,2'-thiobis[ethyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], the N content in monoalkenyl succinimide, the N content in high molecular weight polyisobutylene succinimide, the mass ratio of molybdenum dialkyldithiocarbamate, sulfurized molybdenum dialkyldithiocarbamate oxide, and glycerol oleate are all the same as those in Example 10.

[0091] Among them, the preparation method involved in this comparative example is the same as that in Example 10. The main difference from Example 10 is that the proportion of the antioxidant is changed and the anti-friction agent is removed.

[0092] Comparative Example 5

[0093] In this comparative example, a gasoline engine oil compound additive includes: 15 parts by weight of zinc dialkyldithiophosphate, 8 parts by weight of antioxidant, 20 parts by weight of overbased synthetic calcium sulfonate, 10 parts by weight of low-base synthetic calcium sulfonate, 6 parts by weight of sulfurized alkylphenol calcium, 15 parts by weight of monoalkenyl succinimide, 20 parts by weight of high molecular weight polyisobutylene succinimide, 1.5 parts by weight of friction improver, and 4.5 parts by weight of neutral base oil.

[0094] Among them, the mass ratio of zinc bis(octylphenyl) dithiophosphate and zinc bis(sec-octylphenyl) dithiophosphate, the P content in zinc bis(octylphenyl) dithiophosphate, the P content in zinc bis(sec-octylphenyl) dithiophosphate, the mass ratio of isooctyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate and ethyl 2,2'-thiobis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], the N content in monoalkenyl succinimide, the N content in high molecular weight polyisobutylene succinimide, the mass ratio of molybdenum dialkyldithiocarbamate, molybdenum oxydialkyldithiocarbamate and glycerol oleate are all the same as those in Example 4.

[0095] Among them, the preparation method involved in this comparative example is the same as that in Example 4. The main difference from Example 4 is that the proportion of zinc dialkyldithiophosphate and low-base synthetic calcium sulfonate is changed.

[0096] In summary, the component configurations of each example and each comparative example are described in the following table. Table 1 Component Configuration Table of Examples 1-10

[0097] Table 2 Component Configuration Table of Examples 4, 10 and Comparative Examples 1-5

[0098] Performance Testing:

[0099] The above Examples 1-10 and Comparative Examples 1-5 were respectively added to 15W-40 thickened oil in equal additional doses to formulate 15W-40 grade gasoline engine oil, and then added to the engine of a test vehicle with 10 years and 100,000 kilometers. The original engine lubricating oil of the vehicle was replaced. After starting the vehicle engine and idling for 30 minutes, the oil was drained and then new oil was added again for a driving test. After the vehicle ran for 5,000 km, the oil product was taken for evaluation of anti-wear performance, antioxidant performance, detergency performance and engine noise; the blending formula of 15W-40 thickened oil was: 87.8 parts of Mobil Group I 150SN base oil, 0.2 parts of pour point depressant, and 12 parts of OCP type viscosity index improver.

[0100] Comparative Test 1: For a test vehicle with 10 years and 100,000 kilometers, first use a decibel meter to measure the vehicle noise in different parts and under different conditions, and then carry out the oil change work. After the engine idles for 30 minutes, the oil is drained and replaced with new oil, and then use a decibel meter to measure the vehicle noise in different parts and under different conditions. The experimental results are shown in Table 3 below.

[0101] Table 3 Test Results of Noise Reduction Performance of Different Samples

[0102] It should be understood that during the vehicle noise detection process, the smaller the measured decibel after oil change, the better the noise reduction performance of the oil product. For example: 0-20 dB: Silent, hardly perceptible; 20-40 dB: Quiet, whispering; 40-60 dB: Normal speaking and conversation; 60-70 dB: Noisy, shouting; 70-100 dB: Very noisy, may cause hearing damage.

[0103] Comparative Test 2: Evaluate the anti-wear property of the samples according to SH / T 0189 - Determination Method for Anti-wear Property of Lubricating Oil (Four-ball Machine Method) (test conditions: 392 N, 75 °C, 1200 r / min, 60 min). The experimental results are the wear scar diameter and the average friction coefficient. The specific results are shown in Table 4 below.

[0104] Table 4 Test Results of Anti-wear Performance of Different Samples

[0105] It should be understood that during the anti-wear performance detection process, the smaller the wear scar diameter and the average friction coefficient, the better the anti-wear property of the oil product.

[0106] Comparative Test 3: According to SH / T 0719 - Determination Method for Oxidation Induction Period of Lubricating Oil (Pressure Differential Scanning Calorimetry - PDSC), the test temperature is 210 °C, and the oxidation induction period of the test samples is measured. The experimental results are shown in Table 5 below.

[0107] Table 5 Test Results of Antioxidant Performance of Different Samples

[0108] It should be understood that during the detection of antioxidant performance, the longer the oxidation induction period, the better the antioxidant performance of the oil product.

[0109] Comparative test 4: According to NB / SH / T 0834 - Determination of Moderate High-Temperature Piston Deposits in Engine Oils - Thermal Oxidation Simulation Test Method, the test temperature is 285 °C, and the high-temperature oxidation detergency of the test sample is tested. The experimental results are shown in Table 6 below.

[0110] Table 6 Test Results of Antioxidant Detergency Performance of Different Samples

[0111] It should be understood that during the detection of antioxidant detergency performance, the smaller the mass of high-temperature deposits, the better the antioxidant detergency of the oil product.

[0112] Comparative test 5: According to SH / T 0645 - Heat Pipe Oxidation Method / Determination Method for Detergency of Diesel Engine Oils, the test temperature is 320 °C, the oil flow rate is 1.4 ml / min, and the air flow rate is 10 ml / min. The high-temperature oxidation detergency of the test sample is tested. The experimental results are shown in Table 7 below.

[0113] Table 7 Test Results of Detergency Performance of Different Samples

[0114] It should be understood that during the detection of detergency performance, the higher the heat pipe rating, the better the detergency of the oil product.

[0115] The above content is a further detailed description of the present invention in combination with specific implementation manners. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A gasoline engine oil compound, characterized in that, Comprising: 8 - 23 parts by weight of zinc dialkyldithiophosphate, 7 - 12 parts by weight of antioxidant, 0 - 5 parts by weight of low - base synthetic calcium sulfonate, 13 - 18 parts by weight of over - base synthetic calcium sulfonate, 3 - 7 parts by weight of sulfurized alkylphenol calcium, 14 - 28 parts by weight of mono - olefin succinimide, 19 - 36 parts by weight of high - molecular - weight polyisobutylene succinimide, 0 - 5 parts by weight of friction modifier, 0 - 8.5 parts by weight of neutral base oil; The zinc dialkyldithiophosphate is composed of a sulfur - phosphorus bis - octyl primary alkyl zinc salt and a sulfur - phosphorus bis - secondary alkyl zinc salt mixed in a mass ratio of 3:7; The P content in the sulfur - phosphorus bis - octyl primary alkyl zinc salt is 7.5% - 8.8%, and the P content in the sulfur - phosphorus bis - secondary alkyl zinc salt is 7.5% - 8.7%; The antioxidant is composed of isooctyl β - (3,5 - di - tert - butyl - 4 - hydroxyphenyl) propionate and ethyl 2,2'-thiobis[3-(3,5 - di - tert - butyl - 4 - hydroxyphenyl) propionate] mixed in a mass ratio of 4:6; The N content in the mono - olefin succinimide is 2.1%, and the N content in the high - molecular - weight polyisobutylene succinimide is 1.1%; The friction modifier is composed of molybdenum dialkyldithiocarbamate, molybdenum oxydialkyldithiocarbamate sulfide and glycerol oleate mixed in a mass ratio of 1:1:

1.

2. A preparation method of a gasoline engine oil compound, characterized in that, Comprising: Charging into a container according to the mass - fraction ratio of the components of the gasoline engine oil compound agent described in claim 1. First, add the antioxidant, zinc dialkyldithiophosphate, friction modifier and neutral base oil, heat up to 60 - 70 °C, stir evenly at 500 - 700 rpm, then successively add mono - olefin succinimide and high - molecular - weight polyisobutylene succinimide, control the temperature to 60 - 65 °C, stir evenly at 500 - 700 rpm, then successively add sulfurized alkylphenol calcium, over - base synthetic calcium sulfonate and low - base synthetic calcium sulfonate, maintain at 58 - 62 °C, stir at 500 - 700 rpm for 2 - 3 h, and filter to obtain the gasoline engine oil compound agent.

Images