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Composite calcium-base hexa-polyurea lubricating grease and preparation method thereof

A technology of hexapolyurea-based grease and grease, applied in lubricating composition, petroleum industry, thickener, etc., can solve the problem of volatilization, poor comprehensive performance of complex calcium-based grease, and unimproved shear stability and other problems, to achieve the effect of overcoming poor comprehensive performance, excellent comprehensive performance, and overcoming hardening

Active Publication Date: 2015-03-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the hardening problem that complex calcium base grease exists, those skilled in the art attempt to introduce polyurea grease in complex calcium base grease, for example, US5084193 discloses the grease containing polyurea and complex calcium soap and preparation method thereof, The method includes: first preparing polyurea grease and then preparing composite calcium-based grease, but after the polyurea grease is prepared, the temperature in the reactor can be as high as 89-90°C, and serious volatilization will occur when short-chain acids are added later, and according to The overall performance of the complex calcium-based grease prepared by this method is not good, and needs to be further improved
CN1364859A and CN1657599A disclose calcium-based polyurea grease respectively, yet, the polyurea that they use all is dipolyurea, and their shear stability is still not improved

Method used

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  • Composite calcium-base hexa-polyurea lubricating grease and preparation method thereof
  • Composite calcium-base hexa-polyurea lubricating grease and preparation method thereof
  • Composite calcium-base hexa-polyurea lubricating grease and preparation method thereof

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preparation example Construction

[0047] The present invention also provides a preparation method of composite calcium-based hexapolyurea grease, the method comprising the following steps:

[0048] (1) In the presence of lubricating base oil, diisocyanate, diamine and monoamine are contacted and reacted, and the mixture obtained after the reaction is heated and refined, wherein the molar ratio of diisocyanate, diamine and monoamine is (2.9- 3.1):(1.9-2.1):2;

[0049] (2) In the presence of lubricating base oil, calcium hydroxide is contacted with higher fatty acids and aromatic acids to react, and the mixture obtained after the reaction is heated and dehydrated;

[0050] (3) The product obtained in step (1) is mixed with the product obtained in step (2).

[0051] According to the method of the present invention, step (1) and step (2) are respectively implemented in different reactors, by preparing hexaurea grease and calcium-composite grease respectively, and then hexaurea grease and compound Calcium-based g...

Embodiment 1

[0084] This example is used to illustrate the complex calcium-based hexapolyurea grease provided by the present invention and its preparation method.

[0085] (1) Preparation of hexapolyurea grease

[0086] Raw material components: HVI500SN base oil (purchased from ExxonMobil Chemical Company, viscosity at 100°C is 11mm 2 / s): 435g; octadecylamine (purchased from ACROS company): 24.85g; ethylenediamine: 5.54g; 4,4'-diphenylmethane diisocyanate (purchased from ACROS company, MDI): 34.61g;

[0087] First mix 110g of HVI500SN base oil and 23.07g of MDI and heat to 50°C to obtain mixture A1; mix 110g of HVI500SN base oil with 24.85g of octadecylamine, heat to 60°C, add to mixture A1, and heat up to 80°C for reaction After 30 minutes, add 5.54g of ethylenediamine and react at a constant temperature for 30 minutes to obtain a mixture A2; mix 11.54g of MDI and 100g of HVI500SN base oil, heat to 50°C, and add it to the mixture A2, and react at a constant temperature of 80°C for 30 mi...

Embodiment 2

[0101] This example is used to illustrate the complex calcium-based hexapolyurea grease provided by the present invention and its preparation method.

[0102] Prepare complex calcium-based hexapolyurea grease according to the method of Example 1, the difference is, in the process of preparing complex calcium-based grease in step (2), replace terephthalic acid with 2 times the molar amount of benzoic acid , thus making complex calcium-based hexapolyurea grease.

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Abstract

The invention relates to a composite calcium-base hexa-polyurea lubricating grease which contains lubricating base oil, hexa-polyurea and composite calcium soap, wherein the composite calcium soap is a mixture of higher fatty acid calcium and aromatic acid calcium. The invention also relates to a preparation method of the composite calcium-base hexa-polyurea lubricating grease, which comprises the following steps: (1) in the presence of the lubricating base oil, carrying out contact reaction on diisocyanate, diamine and monoamine in a mol ratio of (2.9-3.1):(1.9-2.1):2, and heating the reaction mixture for refinement; (2) in the presence of the lubricating base oil, carrying out contact reaction on the calcium hydroxide, higher fatty acid and aromatic acid, and heating to dehydrate the reaction mixture; and (3) mixing the product obtained in the step (1) with the product obtained in the step (2). The composite calcium-base octa-polyurea lubricating grease provided by the invention has excellent comprehensive properties.

Description

technical field [0001] The invention relates to a composite calcium-based hexapolyurea lubricating grease and a preparation method of the lubricating grease. Background technique [0002] Polyurea grease (referred to as polyurea grease) is a grease prepared by thickening base oil with organic compounds containing urea groups in the molecule. Since the polyurea thickener is different from the metal soap-based thickener, it does not contain metal ions, which avoids the catalytic oxidation of the metal ions in the soap-based thickener to the grease base oil, so the polyurea grease has good oxidation stability. Excellent performance and thermal stability, making polyurea grease more suitable for lubrication under high temperature conditions. [0003] At present, the reports of articles and patents mainly focus on the preparation and synthesis of dipolyurea grease. The shear stability of dipolyurea grease is poor, and the difference between 100,000 times of work and 60 times of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M123/02C10M177/00
Inventor 王佳孙洪伟何懿峰刘磊翟浩川段庆华刘中其姜靓
Owner CHINA PETROLEUM & CHEM CORP
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