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Composite calcium-base octa-polyurea lubricating grease and preparation method thereo

A technology of octapolyurea-based grease and composite calcium-based grease, which is applied in lubricating compositions, thickeners, and the petroleum industry, can solve the problems of poor comprehensive performance of calcium-based polyurea grease, and achieve excellent comprehensive performance. performance, overcome the poor comprehensive performance, and avoid the effect of strong volatilization

Active Publication Date: 2015-04-29
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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  • Composite calcium-base octa-polyurea lubricating grease and preparation method thereo
  • Composite calcium-base octa-polyurea lubricating grease and preparation method thereo
  • Composite calcium-base octa-polyurea lubricating grease and preparation method thereo

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preparation example Construction

[0018] The present invention provides a preparation method of compound calcium-based octapolyurea 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 cooled to 50-70°C (preferably 50-60°C) ) To obtain a complex calcium-based grease;

[0020] (2) Add diisocyanate, diamine and monoamine to the composite calcium-based grease, carry out a contact reaction at 80-120°C, and heat up the mixture obtained after the reaction for refining. Among them, diisocyanate, diamine The molar ratio with the amount of monoamine is (3.9-4.1):(2.9-3.1):2.

[0021] In step (1), conditions for the contact reaction of calcium hydroxide, higher fatty acid and dibasic aromatic acid may include: a reaction temperature of 80-90° C., and a reaction time of 10-60 minutes.

[0022] In one embodiment, ...

Embodiment 1

[0053] This example is used to illustrate the compound calcium-based octapolyurea grease of the present invention and its preparation method.

[0054] Raw material component: HVI500SN base oil (100°C viscosity 11mm 2 / s, purchased from ExxonMobil Chemical Company): 861g; octadecylamine (available from ACROS): 20.39g; ethylenediamine: 6.81g; 4,4'-diphenylmethane diisocyanate (available from ACROS) Company, MDI): 37.80g; terephthalic acid: 34.3g; Ca(OH) 2 :21g; 12-hydroxystearic acid (purchased from Tongliao Weining Chemical Co., Ltd.): 23.7g; tungsten disulfide: 7.5g; selenium disulfide: 12.5g; fluorinated graphite: 12.5g; diisooctyl Diphenylamine: 7.5g; zinc naphthenate: 12.5g.

[0055] Mix 500g of HVI500SN base oil with 23.7g of 12-hydroxystearic acid and 34.3g of terephthalic acid, stir evenly, heat up to 80°C, add dropwise a lime milk solution containing 21g of calcium hydroxide, and quickly stir and saponify for 60 minutes , The temperature is raised to 105°C, and after the wa...

Embodiment 2

[0065] This example is used to illustrate the compound calcium-based octapolyurea grease of the present invention and its preparation method.

[0066] The compound calcium-based octapolyurea 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 compound calcium-based octapolyurea grease.

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Abstract

The invention also relates to a composite calcium-base octa-polyurea lubricating grease and a preparation method thereof. The preparation method comprises the following steps: (1) in the presence of lubricating base oil, carrying out contact reaction on the calcium hydroxide, higher fatty acid and binary aromatic acid, heating to dehydrate the reaction mixture, and cooling to 50-70 DEG C to obtain a composite calcium-base lubricating grease; and (2) adding diisocyanate, diamine and monoamine into the composite calcium-base lubricating grease, carrying out contact reaction at 80-120 DEG C, and heating the reaction mixture for refinement, wherein the diisocyanate:diamine:monoamine mol ratio is (3.9-4.1):(2.9-3.1):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 preparation method of a composite calcium-based octapolyurea grease, and a composite calcium-based octapolyurea 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 t...

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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