Gasoline engine lubricating oil composition and preparation method thereof

A kind of lubricating oil composition, polymerization reaction technology, applied in the direction of lubricating composition, petroleum industry, etc., can solve the problems of vehicle burning, unqualified low temperature pumping performance, etc., and achieve the effect of excellent low temperature performance and excellent antioxidant performance

Active Publication Date: 2022-01-04
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
Comparison scheme
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Embodiment

[0099] The following examples will be used to illustrate the present invention in further detail, 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 feed amount.

[0101] In the context of the present invention, including in the following Examples and Comparative Examples, each measurement method and calculation method were performed as follows.

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

[0103] Operating instrument: Model 1515 gel permeation chromatography produced by Waters Corporation of the United States. The detector is a Waters 2414 differential refractive index detector. The solvent used to configure the standard is chromatographically pure tetrahydrofuran produced by Acros. The chromatographic column is provided by Waters Company, wh...

Embodiment A

[0136] Under the protection of nitrogen, add 113kg of diluent oil (purchased from Ssangyong Company, the brand is 100N, the same below) into the reaction kettle equipped with mechanical stirring, heat to 83-91°C, and 270kg of the first monomer (decyl methacrylate ester / lauryl methacrylate / tetradecyl methacrylate / hexadecyl methacrylate / octadecyl methacrylate mixture, 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 benzoyl peroxide and 1.08kg dodecyl mercaptan is added dropwise in the reactor, simultaneously with the second monomer of 150kg (tetradecyl methacrylate ester / cetyl methacrylate / octadecyl methacrylate / eicosyl methacrylate mixture, where C 14 = 27% by weight, C 16 = 42%, C 18 = 24%, C 20 =7% by weight, X=16.0), the mixture B of 0.75kg benzoyl peroxide and 0.6kg dodecylmercaptan was added dropwise in the reaction kettle. At the initial moment of dropping, the ratio A / B of the dropping amount (kg / hour) of mixture A ...

Embodiment B

[0140] Under the protection of nitrogen, add 113kg of diluent oil (purchased from Ssangyong Company, the brand is 100N, the same below) into the reaction kettle equipped with mechanical stirring, heat to 83-91°C, and 50kg of the first monomer (methacrylic acid hexyl ester / octyl methacrylate / decyl methacrylate mixture, where C 6 = 71%, C 8 = 21%, C 10 =8%, X=6.6), the mixture A of 0.32kg benzoyl peroxide and 0.21kg dodecyl mercaptan is added dropwise in the reactor, simultaneously with the second monomer of 370kg (dodecyl methacrylate Esters / myristyl methacrylate / hexadecyl methacrylate mixture, where C 12 = 55% by weight, C 14 = 17% by weight, C 16 =28% by weight, X=13.3), the mixture B of 1.8kg benzoyl peroxide and 1.5kg dodecylmercaptan was added dropwise in the reaction kettle. At the initial moment of dropping, the ratio A / B of the dropping amount (kg / hour) of mixture A and the dropping amount (kg / hour) of mixture B is 7:1, and the sum of the two is 12kg / hour, then A / ...

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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 of the present invention comprises gradient copolymer, viscosity index improver, dispersant, detergent, zinc dialkyldithiophosphate, dialkyldithiocarbamate and / or dioxane Dithiocarbamates, antioxidants, friction modifiers and lubricant base stocks. The composition of the invention has a phosphorus content of not more than 0.08% by mass fraction, has excellent low-temperature performance and anti-oxidation performance, and can meet the requirements of SM / GF-4 and SN / GF-5 high-grade gasoline engine lubricating oils.

Description

technical field [0001] The 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. Over the past 30 years, low temperature pumpability has been introduced into engine oil specifications, but initially only for new oils. Low temperature pumpability reflects the rheological behavior of the oil in the pumping area. The failure of low-temperature pumpability of engine oil stems from two mechanisms. One is the air resistance in the gel structure formed by wax crystallization at low temperature, which makes the oil passage unsmooth; the other is the flow restriction caused by too high viscosity. In the low temperature pumpability test (MRV), the "yield stress" is used to simulate air resistance, and the flow restriction behavior is predicted by measuring the "low temperature pumpable viscosity". " [0003] In recen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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