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Lubricating oil composition and method for improving low temperature performance of lubricating oil

A lubricating oil composition and the technology of the composition, which are applied in the directions of lubricating composition, petroleum industry, additives, etc., can solve the problems of increased anti-oxidative load of oil products, vehicle burning, unqualified performance of lubricating oil, etc., and achieve low-temperature pumping. The effect of improved performance, excellent low temperature performance

Active Publication Date: 2018-05-08
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the past 20 years, in order to avoid catastrophic accidents caused by vehicle start failure in winter, low temperature pumpability has been an important indicator of engine oil, but initially only for new oil
Due to the continuous improvement of the engine, the anti-oxidation load of the oil has increased, resulting in the unqualified low-temperature pumping performance of the lubricating oil in the later stage of the actual service period, causing accidents such as burning of the vehicle

Method used

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  • Lubricating oil composition and method for improving low temperature performance of lubricating oil
  • Lubricating oil composition and method for improving low temperature performance of lubricating oil
  • Lubricating oil composition and method for improving low temperature performance of lubricating oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] This example is used to illustrate the acrylate copolymer pour point depressant provided by the present invention and its preparation method.

[0100] Under the protection of nitrogen, add 113kg of diluent oil (purchased from Shuanglong Company, the brand is 100N, the same below) in the reaction kettle equipped with mechanical stirring, heat to 83-91 ° C, at the A feed port, at the rate of 50kg / hour 270kg of the first monomer [decyl methacrylate / lauryl methacrylate / tetradecyl methacrylate / hexadecyl methacrylate / octadecyl methacrylate (C 10 = 28% by weight, C 12 = 32% by weight, C 14 = 28% by weight, C 16 = 8% by weight, C 18 = 4% by weight), The mixture of 1.35kg benzoyl peroxide and 1.08kg dodecyl mercaptan is added dropwise in the reactor, feeds stably for 3 hours, then the rate of addition decreases linearly, so that when the total feed time reaches 6 hours, The flow rate is reduced to 30kg / hour. At the same time, dropwise add 150kg of the second monomer [tet...

Embodiment 2

[0102] This example is used to illustrate the acrylate copolymer pour point depressant provided by the present invention and its preparation method.

[0103] Under the protection of nitrogen, add 113kg of diluent oil to the reaction kettle equipped with mechanical stirring, heat it to 83-91°C, and feed 171kg of the first monomer [octyl methacrylate] at the feed port A at an initial speed of 40kg / hour. Cyl ester / decyl methacrylate / lauryl methacrylate / tetradecyl methacrylate (C 8 = 12% by weight, C 10 = 15% by weight, C 12 = 48% by weight, C 14 = 25% by weight), The mixture of 0.9kg benzoyl peroxide and 0.7kg dodecyl mercaptan is added dropwise in the reactor, then linearly slowly decreases, so that when the total feed time reaches 3 hours, the flow rate is reduced to 32kg / hour, then Decreases linearly and rapidly so that when the total feed time reaches 6 hours, the flow rate drops to 10 kg / hour. At the same time, dropwise add 255kg of the second monomer [tetradecyl metha...

Embodiment 3

[0108] This example is used to illustrate the acrylate copolymer pour point depressant provided by the present invention and its preparation method.

[0109] Under the protection of nitrogen, add 100kg of diluent oil to the reaction kettle equipped with mechanical stirring, heat it to 83-91°C, and feed 166kg of the first monomer [methacrylic acid twelve Alkyl esters / tetradecyl methacrylate / hexadecyl methacrylate / octadecyl methacrylate (C 12 = 50% by weight, C 14 = 18% by weight, C 16 = 20% by weight, C 18 = 12% by weight), A mixture of 0.4kg benzoyl peroxide and 0.5kg dodecyl mercaptan was added dropwise to the reactor, followed by a linear slow increase, so that when the total feed time reached 2h, the flow rate increased to 56kg / hour, followed by a linear rapid increase Decrease so that when the total feed time reaches 4 hours, the flow rate is reduced to 6 kg / hour. At the same time, dropwise add 303kg of the second monomer [decyl methacrylate / dodecyl methacrylate / tetr...

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Abstract

The invention provides a lubricating oil composition and a method for improving the low temperature performance of lubricating oil. The lubricating oil composition comprises: A) an acrylate-based copolymer pour point depressant containing a variety of copolymers obtained by co-polymerizing a first monomer represented by a formula (1) and a second monomer represented by a formula (2) according to ratio gradient change, wherein the formula (1) and the formula (2) are defined in the specification; B) a viscosity index improver; C) a dispersant; D) the mixture of alkyl salicylate and sulfurized alkylphenolate; E) zinc dialkyldithiophosphate; F) an auxiliary antioxidant; G) an oil-soluble organic molybdenum friction improver; and H) the balance of lubricating oil base oil. According to the present invention, the composition has excellent low-temperature performance.

Description

technical field [0001] The invention relates to a lubricating oil composition, in particular to a lubricating oil composition suitable for gasoline engines. Background technique [0002] The requirements of environmental protection and energy saving have promoted the development of engine technology, and also promoted the continuous upgrading of gasoline engine oil. The performance requirements of oil products in terms of anti-oxidation, cleaning, sludge dispersion, anti-wear, and friction reduction are also getting higher and higher. At present, the highest quality level of lubricating oil is the SN / GF-5 level formulated by the American Petroleum Institute (API) and the International Lubricant Standardization and Certification Committee (ILSAC). [0003] In the past 20 years, in order to avoid catastrophic accidents caused by vehicle start failure in winter, low temperature pumpability has always been an important indicator of engine oil, but initially it was only for new o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M145/14C10M167/00C10N40/25C10N30/08
CPCC10M145/14C10M167/00C10M2205/022C10M2205/024C10M2205/04C10M2205/06C10M2207/144C10M2209/084C10M2215/064C10M2217/06C10M2219/068C10M2219/087C10M2223/045C10N2030/08C10N2040/255C10N2010/12C10N2010/04
Inventor 徐杰张耀段庆华武志强张倩刘依农夏青虹张峰
Owner CHINA PETROLEUM & CHEM CORP
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