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Gasoline engine lubricating oil composition and preparation method thereof

A lubricating oil composition, gasoline engine technology, applied in lubricating composition, petroleum industry, etc., can solve problems such as vehicle burning, low-temperature pumping performance failure, etc.

Active Publication Date: 2019-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, due to the continuous progress of the engine, the anti-oxidation load of the oil has increased, resulting in some lubricating oils that have passed the new oil pumpability requirements, and the low-temperature pumpability in the latter part of the actual service period has failed, which once caused the vehicle to burn out Waiting for an accident

Method used

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  • Gasoline engine lubricating oil composition and preparation method thereof
  • Gasoline engine lubricating oil composition and preparation method thereof
  • Gasoline engine lubricating oil composition and preparation method thereof

Examples

Experimental program
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Embodiment

[0099] Hereinafter, the present invention will be described in further detail by using examples, but the present invention is not limited to these examples.

[0100] In the following examples and comparative examples, the respective contents of the copolymer and the diluent oil and the contents of each monomer in the copolymer are calculated according to the feeding amount.

[0101] In the context of the present invention, including in the following examples and comparative examples, the respective measurement methods and calculation methods are carried out as follows.

[0102] 1. Gel permeation chromatography (GPC) separation method

[0103] Operating instrument: Model 1515 gel permeation chromatograph produced by American Waters Company. The detector was a Waters2414 refractive index detector. The solvent used for preparing the standard was chromatographically pure tetrahydrofuran produced by Acros. The chromatographic column is provided by Waters Company, and is connecte...

Embodiment A

[0136] Under nitrogen protection, add 113kg of diluent oil (purchased from Ssangyong Company, brand name is 100N, the same below) in the reactor equipped with mechanical stirring, be heated to 83-91 ℃, and 270kg of the first monomer (decyl methacrylate) Mixture of ester / dodecyl methacrylate / tetradecyl methacrylate / hexadecyl methacrylate / octadecyl methacrylate, where C 10 =61%, C 12 = 20%, C 14 =12%, C 16 =5%, C 18 =2%, X=11.1), the mixture A of 1.35kg of benzoyl peroxide and 1.08kg of dodecyl mercaptan was added dropwise to the reactor, while 150kg of the second monomer (tetradecyl methacrylate) was added dropwise. Mixture of esters / hexadecyl methacrylate / octadecyl methacrylate / eicosyl methacrylate, where C 14 = 27% by weight, C 16 =42%, C 18 = 24%, C 20 = 7 wt%, X = 16.0), 0.75 kg of benzoyl peroxide and 0.6 kg of dodecyl mercaptan mixture B were added dropwise to the reaction kettle. At the initial moment of dropwise addition, the ratio A / B of the dropwise addition a...

Embodiment B

[0140] Under nitrogen protection, add 113kg of diluent oil (purchased from Ssangyong Company, the trade name is 100N, the same below) into the reactor equipped with mechanical stirring, heat to 83-91 ℃, and 50kg of the first monomer (hexyl methacrylate) Mixtures of esters / octyl methacrylate / decyl methacrylate, where C 6 =71%, C 8 = 21%, C 10 =8%, X=6.6), the mixture A of 0.32kg of benzoyl peroxide and 0.21kg of dodecyl mercaptan was added dropwise to the reactor, while 370kg of the second monomer (dodecyl methacrylate) was added dropwise to the reactor. Mixtures of esters / tetradecyl methacrylate / hexadecyl methacrylate, where C 12 = 55% by weight, C 14 =17 wt%, C 16 =28% by weight, X = 13.3), a mixture B of 1.8kg of benzoyl peroxide and 1.5kg of dodecyl mercaptan was added dropwise to the reaction kettle. At the initial moment of dropwise addition, the ratio A / B of the dropwise addition amount of mixture A (kg / hour) to the dropwise addition amount of mixture B (kg / hour) wa...

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Abstract

The invention provides a gasoline engine lubricating oil composition and a preparation method thereof. The gasoline engine lubricating oil composition is prepared from the following components: a gradient copolymer, a viscosity index modifier, a dispersant, a cleaning agent, zinc dialkyl dithiophosphate, dialkyl dithiocarbamate and / or dialkyl dithiocarbamate, an antioxidant, a friction modifier and lubricant base oil. The gasoline engine lubricating oil composition has the phosphorus content with the mass fraction being not more than 0.08%, has very excellent low-temperature performance and antioxidant performance, and can meet the requirements of SM / GF-4 and SN / GF-5 high-grade gasoline engine lubricating oil.

Description

technical field [0001] The present invention relates to a lubricating oil composition, in particular to a gasoline engine lubricating oil composition. Background technique [0002] Low temperature performance is an important property of modern engine oils, and low temperature pumpability has been introduced into engine oil specifications over the past 30 years, but initially only for new oils. The low temperature pumping performance reflects the rheological behavior of the oil in the oil pump area. The failure of low-temperature pumpability of engine oil stems from two mechanisms. One is that there is air resistance in the gel structure formed by wax crystallization at low temperature, which makes the oil path unsmooth; the other is the flow restriction caused by too high viscosity. In the cryopumpability test (MRV), the "yield stress" is used to simulate air resistance, and the "cryopumping viscosity" is measured to predict the flow restriction behavior. " [0003] In re...

Claims

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Application Information

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IPC IPC(8): C10M169/04C10N30/08C10N30/10C10N40/25
CPCC10M169/048C10M2207/026C10M2207/289C10M2209/08C10M2205/022C10M2205/024C10M2205/04C10M2205/06C10M2203/1025C10M2223/045C10M2215/064C10M2219/068C10M2219/088C10M2217/06C10M2219/044C10N2030/08C10N2030/10C10N2040/255C10N2010/04C10N2020/02C10N2060/02
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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