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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, and achieve excellent comprehensive performance, excellent comprehensive performance, The effect of excellent mechanical stability

Active Publication Date: 2015-05-20
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

[0044] The present invention also provides a preparation method of composite calcium-based tetrapolyurea grease, the method comprising the following steps:

[0045] (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);

[0046] (2) In the presence of lubricating base oil, calcium hydroxide is contacted with higher fatty acids, dibasic aromatic acids and C1-C6 fatty acids, and the mixture obtained after the reaction is heated and dehydrated;

[0047] (3) The product obtained in step (1) is mixed with the product obtained in step (2).

[0048] 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 ...

Embodiment 1

[0078] This example is used to illustrate the complex calcium-based tetrapolyurea grease provided by the present invention and its preparation method.

[0079] (1) Preparation of tetrapolyurea grease

[0080] 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): 31.87g; ethylenediamine: 3.56g; 4,4'-diphenylmethane diisocyanate (purchased from ACROS company, MDI): 29.57g;

[0081] First mix 150g of HVI500SN base oil and 29.57g of MDI and heat to 50°C, slowly add 3.56g of ethylenediamine, heat up to 80°C, and react for 30 minutes to obtain mixture A1; mix 150g of HVI500SN base oil with 31.87g of octadecylamine, Heat to 60°C, add to mixture A1, heat up to 80°C, react for 30 minutes, continue to heat up to 210°C, then add 135g of HVI500SN base oil and cool to 100°C, then grind twice with a three-roller mill to obtain tetramer Urea grease.

[0082] (2) Prepara...

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] The method for preparing composite calcium-based tetrapolyurea grease according to Example 1, the difference is that, in the process of preparing composite calcium-based grease in step (2), replace terephthalic acid with the same molar amount of isophthalic acid Formic acid 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, binary aromatic acid calcium, and C1-C6 fatty 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, binary aromatic acid, and C1-C6 fatty acid calcium 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): C10M123/02C10M169/06C10M177/00
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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