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Urea grease composition

A technology of urea grease and composition, which is applied in the direction of lubricating composition, petroleum industry, thickener, etc., and can solve problems such as impossibility of obtaining grease, poor penetration, large degree of oil separation, etc.

Active Publication Date: 2009-09-23
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technology suffers from the disadvantages of poor penetration and the impossibility of obtaining greases with a penetration of about 250 unless a large amount of thickener is used, and a high degree of oil separation at high temperatures
Urea greases using expensive raw material TODI in a complex production process cannot compete in the market

Method used

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  • Urea grease composition
  • Urea grease composition
  • Urea grease composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0135] A closed prototype grease kettle apparatus was charged with lubricating base oil and isocyanate A (diphenylmethane-4,4'-diisocyanate) as component A and heated to 60°C with stirring. Amine A (technical octylamine) was added as component B1 and had been mixed in the lubricating base oil and reacted with component A. The urea compound 'a' represented by the general formula (octyl)-NHCONH-(diphenylmethane)-NHCONH-(octyl) was obtained. The contents were heated to about 80°C by the heat of reaction. This temperature was maintained for 10 minutes, then the amine B (technical oleylamine) as component B2 previously mixed and dissolved in the lubricating base oil was added to the kettle and reacted with the remaining isocyanate A as component A. A urea compound 'b' represented by the general formula (oleyl)-NHCONH-(diphenylmethane)-NHCONH-(oleyl) was obtained. After stirring for 5 minutes, add amine A (industrial octylamine) and amine B (industrial oleylamine) which are compon...

Embodiment 2

[0137] A closed prototype grease kettle apparatus was charged with lubricating base oil and isocyanate A (diphenylmethane-4,4'-diisocyanate) as component A and heated to 60°C with stirring. Amine A (technical octylamine) was added as component B1 and had been mixed in the lubricating base oil and reacted with component A. The urea compound 'a' represented by the general formula (octyl)-NHCONH-(diphenylmethane)-NHCONH-(octyl) was obtained. The contents were heated to about 80°C by the heat of reaction. This temperature was maintained for 10 minutes, then the amine B (technical oleylamine) as component B2 previously mixed and dissolved in the lubricating base oil was added to the kettle and reacted with the remaining isocyanate A as component A. A urea compound 'b' represented by the general formula (oleyl)-NHCONH-(diphenylmethane)-NHCONH-(oleyl) was obtained. After stirring for 5 minutes, add amine A (industrial octylamine) and amine B (industrial oleylamine) which are compon...

Embodiment 3

[0139] A closed prototype grease kettle apparatus was charged with lubricating base oil and isocyanate A (diphenylmethane-4,4'-diisocyanate) as component A and heated to 60°C with stirring. Amine A (technical octylamine) was added as component B1 and had been mixed in the lubricating base oil and reacted with component A. The urea compound 'a' represented by the general formula (octyl)-NHCONH-(diphenylmethane)-NHCONH-(octyl) was obtained. The contents were heated to about 80°C by the heat of reaction. This temperature was maintained for 10 minutes, then the amine B (technical oleylamine) as component B2 previously mixed and dissolved in the lubricating base oil was added to the kettle and reacted with the remaining isocyanate A as component A. A urea compound 'b' represented by the general formula (oleyl)-NHCONH-(diphenylmethane)-NHCONH-(oleyl) was obtained. After stirring for 5 minutes, add amine A (industrial octylamine) and amine B (industrial oleylamine) which are compon...

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Abstract

The present invention aims to offer a urea grease composition which excels in noise performance, has long life at high temperatures and, further, also provides the basic performance of greases such as shear stability and heat resistance, as well as appropriate oil separation properties. The present invention provides a urea grease composition comprising: a diurea compound as shown by the General Formula (A) below: R<11>NHCONHR<12>NHCONHR<13>.... (A), (where R<11> and R<13> are groups selected from the group consisting of hydrocarbon groups having from 6 to 20 carbons, at least one of R<11> and R<13> is a dodecyl group and R<12> is a diphenylme thane group); and a diurea compound as shown by the General Formula (B) below: R<21>NHCONHR<22>NHCONHR<23>.... (B), (where R<21 > and R<23> are groups selected from the group consisting of hydrocarbon groups having from 6 to 20 carbons, at least one of R<21> and R<23> is an oleyl group, and R<22> is a diphenylmethane group).

Description

technical field [0001] The present invention relates to a novel urea grease composition which is excellent in noise performance, has a long life at high temperature and additionally provides the basic properties of grease such as shear stability and heat resistance and suitable Oil separation properties. Background technique [0002] The most important features of urea greases using urea compounds as thickeners are their heat resistance and oxidation stability. Since a grease having a lubrication life several to ten times or more longer than that of ordinary lithium-based greases at high temperatures has been developed, urea greases are currently widely used in many applications. [0003] However, almost all urea greases on the market have poor noise performance, and there are often cases where they cannot be used in the many machines and equipment that are currently required to be quiet. The situation now is that the scope of application has been limited. [0004] For ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M115/08C10M169/06C10N50/10C10N40/02C10N30/08C10N30/00C10N20/02
CPCC10M169/06C10M115/08C10M2215/1026C10M2215/064C10N2230/76C10M2205/0206C10M2207/0406C10N2230/08C10M2203/1006C10N2250/10C10N2030/08C10N2030/76C10N2050/10C10N2020/02C10N2040/02
Inventor 田中启司筱田宪明加藤哲也
Owner SHELL INT RES MAATSCHAPPIJ BV
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