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Complex-calcium-based tetrapolyurea lubricating grease and preparation method thereof

A calcium-based and lubricating grease technology, which is applied in lubricating compositions, petroleum industry, thickeners, etc., can solve the problems of poor comprehensive performance of calcium-based polyurea grease, achieve excellent comprehensive performance, and overcome poor comprehensive performance. The effect of good and excellent comprehensive performance

Active Publication Date: 2015-07-01
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 try to introduce polyurea grease in complex calcium base grease, for example, CN1364859A and CN1657599A disclose respectively by introducing dipolyurea in complex calcium base grease And the obtained calcium-based polyurea grease, however, the overall performance of these calcium-based polyurea greases is not good

Method used

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  • Complex-calcium-based tetrapolyurea lubricating grease and preparation method thereof
  • Complex-calcium-based tetrapolyurea lubricating grease and preparation method thereof
  • Complex-calcium-based tetrapolyurea lubricating grease and preparation method thereof

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preparation example Construction

[0043] The present invention also provides a preparation method of composite calcium-based tetrapolyurea grease, the method comprising the following steps:

[0044] (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 up and refined, wherein the molar ratio of diisocyanate, diamine and monoamine is (1.9- 2.1):1:(1.9-2.1);

[0045] (2) In the presence of lubricating base oil, calcium hydroxide is contacted with higher fatty acids and dibasic aromatic acids, and the mixture obtained after the reaction is heated and dehydrated;

[0046] (3) The product obtained in step (1) is mixed with the product obtained in step (2).

[0047] According to the method of the present invention, step (1) and step (2) are respectively implemented in different reactors, by preparing tetrapolyurea grease and complex calcium-based grease respectively, and then tetrapolyurea grease and compound...

Embodiment 1

[0077] This example is used to illustrate the complex calcium-based tetrapolyurea grease provided by the present invention and its preparation method.

[0078] (1) Preparation of tetrapolyurea grease

[0079] Raw material components: HVI500SN base oil (viscosity of 11mm at 100°C 2 / s, purchased from ExxonMobil Chemical Company): 435g; octadecylamine (purchased from ACROS): 31.87g; ethylenediamine: 3.56g; 4,4'-diphenylmethane diisocyanate (purchased from ACROS company, MDI): 29.58g;

[0080] First, mix 150g of HVI500SN base oil and 29.58g of MDI and heat to 50°C, slowly add 3.56g of ethylenediamine, raise the temperature to 80°C, and react for 30 minutes to obtain an intermediate product.

[0081] Mix 150g of HVI500SN base oil with 31.87g of octadecylamine, heat to 60°C, add the resulting mixture to the intermediate product, raise the temperature to 80°C, react for 30 minutes, continue to heat up to 210°C, and then add 135g of HVI500SN base oil Cool to 100°C, then grind twic...

Embodiment 2

[0097] This example is used to illustrate the complex calcium-based tetrapolyurea grease provided by the present invention and its preparation method.

[0098] Prepare composite calcium-based tetrapolyurea grease according to the method of Example 1, the difference is that in the process of preparing composite calcium-based tetrapolyurea grease in step (3), add 8g tungsten disulfide, 8g diisooctyl diphenylamine and 8g barium petroleum sulfonate to prepare complex calcium-based tetrapolyurea grease.

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Abstract

The invention relates to a complex-calcium-based tetrapolyurea lubricating grease and a preparation method thereof. The lubricating grease comprises lubricating base oil, tetrapolyurea, and composite calcium soap. The composite calcium soap is a mixture of higher fatty acid calcium and binary aromatic acid calcium. The invention also relates to a preparation method of the complex-calcium-based tetrapolyurea lubricating grease. The preparation method comprises the steps that: (1) under the existence of a lubricating base oil, diisocyanate, diamine and monoamine are subjected to a contact reaction; and the mixture obtained after the reaction is heated and refined; wherein a dose molar ratio of diisocyanate to diamine to monoamine is (1.9-2.1):1:(1.9-2.1); (2) under the existence of the lubricating base oil, calcium hydroxide, higher fatty acid and binary aromatic acid are subjected to a contact reaction; and the mixture obtained from the reaction is heated and dehydrated; and (3) the product obtained in the step (1) and the product obtained in the step (2) are mixed. The complex-calcium-based tetrapolyurea lubricating grease provided by the invention has excellent comprehensive performance.

Description

technical field [0001] The invention relates to a composite calcium-based tetrapolyurea 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): C10M123/06C10M169/06C10M177/00C10N50/10
Inventor 孙洪伟王佳沈言谨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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