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Polyurea grease composition and preparation method thereof

A technology of polyurea-based grease and composition, which is applied in the field of novel polyurea-based grease composition and its preparation, and can solve problems such as poor mechanical stability, low water absorption capacity, and unsatisfactory indicators of steel mesh oil and water leaching loss. , achieve excellent water resistance, increase thickening ability, and good mechanical stability

Active Publication Date: 2013-09-04
SHANGHAI HITECRUN SPECIAL LUBRICATE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, polyurea-based thickeners at home and abroad are generally prepared by reacting diisocyanates with fatty amines and / or alicyclic amines. CN102504921A discloses a polyurea-based grease additive composition, and its polyurea-based thickener Prepared by the reaction of isocyanate, fatty amine and aromatic amine at a mass ratio of 2.66:1.33:1, the prepared polyurea-based grease has good mechanical stability, but the steel mesh oil separation (colloid stability) and water leaching loss indicators Neither is ideal
US5238589A discloses a polyurea-based grease composition, through the reaction of diisocyanate, monoamine, diamine and a polyetheramine with specific molecular weight and chemical composition to prepare a thickener with higher thickening ability. The obtained polyurea-based grease also has very low water absorption capacity, but its mechanical stability is poor.

Method used

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  • Polyurea grease composition and preparation method thereof
  • Polyurea grease composition and preparation method thereof
  • Polyurea grease composition and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038]Add 300 parts of 150BS base oil (Jiangsu Yinglong Petrochemical Co., Ltd., the same below) and 21.7 parts of 4,4'-diisocyanatodiphenylmethane WANNATE MDI-100 (Wanhua Chemical Group Co., Ltd. , the same below), stirring and heating to 70°C for dissolution, and at the same time, 19 parts of octadecylamine (Nanjing Jinlong Chemical Group Co., Ltd., the same below), 8.2 parts of Aniline (Shandong Haihua Co., Ltd., the same below), and 3.2 parts of polyetheramine D230 (Huntsman Corporation, Inc, the same below), were dissolved at 70°C. When the stirring speed is about 80r / min, quickly put the mixed solution in the reaction kettle into the fat-making kettle, stir the reaction and raise the temperature to 110°C, add the remaining 100 parts of base oil 150BS, continue to heat up to 150°C, and keep the temperature constant Stir for 30 minutes, lower the temperature and cool down, and homogenize out of the kettle to obtain grease composition I.

Embodiment 2

[0046] Add 260 parts of PAO40 base oil SpectraSyn40 (ExxonMobil Chemical Company, the same below) to the fat making kettle, add 20.7 parts of 4,4'-diisocyanatodiphenylmethane WANNATE MDI-100, stir and heat up to 70°C Dissolve, and add 22.2 parts of hexadecylamine (Nanjing Jinlong Chemical Group Co., Ltd.), 6.6 parts of p-toluidine (Shandong Haihua Co., Ltd.), 2.6 parts of polyether in another reaction kettle with 180 parts of SpectraSyn40 Amine D230, dissolved at 70°C. When the stirring speed is about 80r / min, quickly put the mixed solution in the reaction kettle into the fat-making kettle, stir the reaction and raise the temperature to 110°C, add the remaining 100 parts of base oil SpectraSyn40, continue to heat up to 150°C, and keep the temperature constant Stir for 50 minutes, lower the temperature and cool down, and homogenize out of the kettle to obtain grease composition V.

[0047] The above polyurea-based grease compositions I, II, III, IV and V were tested for perfor...

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Abstract

The invention provides a polyurea grease composition and a preparation method thereof. The composition has excellent mechanical stability, water resistance, oxidation resistance, colloid stability, and the like, comprises base oil and a polyurea densifier, and is characterized in that the polyurea densifier is obtained through the reaction between diisocyanate and organic amine, and the organic amine is composed of aliphatic amine, aromatic amine, and polyether amine.

Description

technical field [0001] The invention belongs to the field of polyurea-based lubricating grease, and in particular relates to a novel polyurea-based lubricating grease composition with excellent mechanical stability, water resistance, oxidation resistance and colloidal stability and a preparation method thereof. Background technique [0002] Polyurea-based grease refers to a type of grease that contains urea groups in the thickener molecules. It does not contain metal ions, overcomes the lack of catalytic action of soap-based greases containing metal ions on the base oil, and has a special The crystal and colloidal structure has strong adhesion to the metal surface, resulting in a stable organic and iron oxide protective layer on the metal surface, greatly reducing wear. It is especially suitable for lubricating occasions with high temperature, high load, high speed range and poor medium contact. It has long service life, wide range of uses and good application prospects. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M119/24C10M177/00
Inventor 王瑞兴范海粉
Owner SHANGHAI HITECRUN SPECIAL LUBRICATE SCI & TECH
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