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Polyurea thickening agent, lubricating grease prepared from polyurea thickening agent and preparation method of lubricating grease

A technology of polyurea thickener and polyurea grease, which is applied in the direction of thickener, lubricating composition, petroleum industry, etc., can solve the problems of polyurea grease lubricating performance and complex process, and achieve the reduction of types and usage, The effect of simple preparation process and good extreme pressure performance

Pending Publication Date: 2020-09-29
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a polyurea thickener with a simple preparation process, a grease containing the polyurea thickener and a preparation method thereof, which solves the problem of complex processes for improving the lubricating performance of polyurea grease in the prior art and the need for a large number of additives and technical issues in compounding method research

Method used

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  • Polyurea thickening agent, lubricating grease prepared from polyurea thickening agent and preparation method of lubricating grease
  • Polyurea thickening agent, lubricating grease prepared from polyurea thickening agent and preparation method of lubricating grease
  • Polyurea thickening agent, lubricating grease prepared from polyurea thickening agent and preparation method of lubricating grease

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 1490g of pentaerythritol ester oil and 301.02g of 2-amino-6-methoxybenzothiazole into a 5L reaction kettle, start stirring and raise the temperature to 95°C, keep stirring for 30min; add 1000g of pentaerythritol ester into a 5L dissolution kettle oil and 229.88 diphenylmethane-4,4'-diisocyanate, start stirring and heat up to 80°C, keep stirring for 30min; Then heat up to 160°C, refine for 120 minutes; cool down to 70°C, add 30g of antioxidant alkyl diphenylamine, 9g of antirust agent barium petroleum sulfonate, homogenize, filter, and degas to obtain about 3kg of the final product.

[0024] Wherein, the kinematic viscosity of the pentaerythritol ester oil at 40°C is 20-500mm 2 / s.

Embodiment 2

[0026] Add 894g pentaerythritol esters oil, 298g rapeseed oil and 298g alkylnaphthalene-15, 182.86g 2-amino-6-methoxybenzothiazole and 136.72g of octadecylamine in the reactor of 5L, start stirring and Heat up to 100°C, keep warm and stir for 30 minutes; add 600g of pentaerythritol ester ester oil, 200g of rapeseed oil, 200g of alkylnaphthalene-15 and 209.74g of diphenylmethane-4,4'-diisocyanate into a 5L dissolution kettle, Start stirring and heat up to 80°C, keep stirring for 30 minutes; then add the mixture in the dissolution kettle to the reaction kettle, raise the temperature to 110°C, keep the temperature for 60 minutes, then raise the temperature to 170°C, and refine for 100 minutes; cool down to 70°C, add Antioxidant N-phenyl α-naphthylamine 45g, rust inhibitor barium dinonyl naphthalene sulfonate 15g, after homogenizing, filtering and degassing, about 3kg of the final product was obtained.

[0027] Wherein, the kinematic viscosity of the pentaerythritol ester oil, rap...

Embodiment 3

[0029] Add 1043g pentaerythritol ester oil, 298g base oil MVI500 and 149g polyalphaolefin (PAO10), 235.60g 2-amino-6-methoxybenzothiazole and 56.31g octylamine in a 5L reactor, start stirring And heat up to 100°C, keep stirring for 30min; add 700g of pentaerythritol ester ester oil, 200g of base oil MVI500, 100g of polyalphaolefin (PAO10) and 239.90g of diphenylmethane-4,4'- For diisocyanate, start stirring and heat up to 80°C, keep stirring for 30 minutes; then add the mixture in the dissolution tank to the reaction kettle, raise the temperature to 115°C, keep the temperature for 50 minutes, then raise the temperature to 210°C, refine for 30 minutes; cool down to 70 ℃, add antioxidant dioctyl diphenylamine 25g and N-phenyl α-naphthylamine 20g, rust inhibitor 9g and benzotriazole, homogenize, filter and degas to obtain about 3kg of final product.

[0030] Wherein, the kinematic viscosity of the pentaerythritol ester oil, base oil MVI500 and PAO1040°C is 20-500mm 2 / s.

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Abstract

The invention provides a polyurea thickening agent, lubricating grease prepared from the polyurea thickening agent and a preparation method of the lubricating grease, belonging to the technical fieldof lubricating materials. The polyurea lubricating grease comprises the following components in percentage by weight: 69.2 to 89.8% of base oil, 10 to 25% of a polyurea thickening agent, 0 to 5% of anantioxidant and 0.2 to 0.8% of an antirust agent, wherein the polyurea thickening agent is synthesized from diphenylmethane-4,4'-diisocyanate and 2-amino-6-methoxybenzothiazole or mixed amine, the mixed amine is a mixture of 2-amino-6-methoxybenzothiazole and a compound with a structural formula of R-NH2, and R is an alkyl or cycloalkyl group with a carbon atom number of 8-22. Compared with existing polyurea lubricating grease technology, the polyurea lubricating grease prepared by the invention adopts the novel polyurea thickening agent with extreme pressure property, does not need to add anextreme pressure agent, has good extreme pressure property, reduces the variety and dosage of additives, and can be widely applied to the field of bearing lubrication.

Description

technical field [0001] The invention relates to the technical field of bearing lubricating materials, in particular to a urea-based thickener with extreme pressure performance, a lubricating grease containing the polyurea thickener and a preparation method thereof. Background technique [0002] Polyurea grease, because the thickener system does not contain metal cations, avoids the catalytic oxidation of the base oil and its thickener system, so it has excellent oxidation resistance, and is used in high-temperature lubrication such as aviation, metallurgy and automobiles It is considered to be the grease with the most development potential in the future. However, the lubricating performance of polyurea grease is poor, and its adaptability to lubricating additives is poor, which greatly limits its wider application. [0003] At present, there are generally two methods to improve the lubricating properties of polyurea greases, that is, adding additives with lubricating proper...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M115/10C10M169/00C10N50/10C10N30/06C10N40/02
CPCC10M115/10C10M169/00C10M2201/085C10M2203/065C10M2203/1025C10M2205/026C10M2205/0285C10M2207/1225C10M2207/1265C10M2207/1285C10M2207/16C10M2207/2835C10M2207/401C10M2215/064C10M2215/065C10M2215/223C10M2219/044C10M2219/104C10M2227/06
Inventor 王晓波徐状王卓群
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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