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

A technology of calcium-based tetrapolyurea grease and composite calcium-based grease, 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, avoid strong volatilization, overcome hardening effect

Active Publication Date: 2013-08-21
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

[0018] The present invention provides a preparation method of complex calcium-based tetrapolyurea grease, which comprises the following steps:

[0019] (1) In the presence of lubricating base oil, the calcium hydroxide, higher fatty acid and dibasic aromatic acid are contacted and reacted, and the mixture obtained after the reaction is heated and dehydrated, and then the temperature is lowered to 70-80°C to obtain a complex calcium-based grease ;

[0020] (2) Add diisocyanate and diamine successively to the compound calcium-based grease, mix and contact for at least 5 minutes, then add monoamine, heat up to 100-120°C for contact reaction, and heat up the resulting mixture for refining , Wherein the molar ratio of the amount of diisocyanate, diamine and monoamine is (1.9-2.1):1:(1.9-2.1).

[0021] According to the method of the present invention, in step (1), the temperature of the grease obtained after dehydration is lowered to 70-80°C, and in step (2), the monoamine is added after ...

Embodiment 1

[0055] This example is used to illustrate the composite calcium-based tetrapolyurea grease of the present invention and its preparation method.

[0056] Raw material component: naphthenic oil (purchased from China National Offshore Oil Corporation, viscosity at 100°C is 12mm 2 / s): 835g; terephthalic acid: 30g; Ca(OH) 2 :22g; 12-hydroxystearic acid (purchased from Tongliao Weining Chemical Co., Ltd.): 60g; octadecylamine (purchased from ACROS company): 31.87g; ethylenediamine: 3.56g; 4,4'-two Phenylmethane diisocyanate (MDI): 29.58 g; tungsten disulfide: 8 g; selenium disulfide: 12 g; fluorinated graphite: 10 g; diisooctyl diphenylamine: 8 g; zinc naphthenate: 10 g.

[0057] Mix 500g of naphthenic oil with 60g of 12-hydroxystearic acid and 30g of terephthalic acid, stir evenly, heat to 80°C, add dropwise a lime milk solution containing 22g of calcium hydroxide, and quickly stir and saponify for 60 minutes. The temperature is raised to 105°C, and after the water is removed, the temp...

Embodiment 2

[0067] This example is used to illustrate the composite calcium-based tetrapolyurea grease of the present invention and its preparation method.

[0068] The composite calcium-based tetrapolyurea grease was prepared according to the method of Example 1, except that the same molar amount of isophthalic acid was used instead of terephthalic acid to obtain the composite 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 preparation method comprises the steps that: (1) under the existence of a lubricating base oil, calcium hydroxide, higher fatty acid, and binary aromatic acid are subjected to contact reaction; a mixture obtained after the reaction is subjected to heating dehydration, and is cooled to 70-80 DEG C, such that complex-calcium-based lubricating grease is obtained; (2) diisocyanate and diamine are sequentially added into the complex-calcium-based lubricating grease, and mixed contact is allowed for at least 5min; monoamine is added, and the mixture is heated to 100-120 DEG C, such that contact reaction is carried out; and a mixture obtained after the reaction is heated and refined. A dose molar ratio of diisocyanate to diamine to monoamine is (1.9-2.1):1:(1.9-2.1). The complex-calcium-based tetrapolyurea lubricating grease provided by the invention has excellent comprehensive performance.

Description

Technical field [0001] The invention relates to a preparation method of a composite calcium-based tetrapolyurea grease, and a composite calcium-based tetrapolyurea grease prepared by the method. Background technique [0002] Polyurea grease (polyurea grease for short) is a grease prepared by thickening base oil with organic compounds containing urea groups in the molecule. Since polyurea thickener is different from metal soap-based thickener, it does not contain metal ions, which avoids the catalytic oxidation of metal ions in the soap-based thickener on the grease base oil, so polyurea grease has good oxidation stability Performance and thermal stability make polyurea grease more suitable for lubrication under high temperature conditions. [0003] At present, the articles and patent reports mainly focus on the preparation and synthesis of diurea grease. The shear stability of diurea grease is poor, and the difference in penetration between 100,000 times and 60 times is 80. Above...

Claims

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Application Information

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Patent Type & Authority Applications(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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