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Urea grease

A urea-based grease, aliphatic technology, used in lubricating compositions, thickeners, petroleum industry, etc., can solve problems such as poor acoustic characteristics, and achieve the effect of maintaining heat resistance and acoustic characteristics

Active Publication Date: 2017-02-22
IDEMITSU KOSAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Although urea-based grease has excellent heat resistance, it has a problem of poor acoustic characteristics depending on the amine used

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0077] pass image 3 A urea-based grease manufacturing apparatus of the type shown is used to manufacture grease. A specific method for producing the grease is as follows.

[0078] PAO base oil [poly-α-olefin (40°C kinematic viscosity is 63mm at 40°C) heated to 70°C 2 / s, the kinematic viscosity at 100°C is 9.8mm 2 / s), containing 3.4% by mass of cyclohexylamine and 13.7% by mass of octadecylamine] and the same heated to 70°C PAO base oil [polyα-olefin (40°C kinematic viscosity is 63mm 2 / s, the kinematic viscosity at 100°C is 9.8mm 2 / s), containing 6.0% by mass of MDI] were continuously introduced into the manufacturing device at flow rates of 508mL / min and 890mL / min, respectively, and immediately applied to the mixed solution for 216,000s through the high-speed rotating part while the mixed solution passed through the gap. -1 the highest shear rate. In addition, the ratio (Max / Min) of the highest shear rate (Max) to the lowest shear rate (Min) during passage through th...

Embodiment 2

[0081] In Example 1, grease was produced in the same manner except that the flow rate of the amine solution was 178 mL / min and the flow rate of the MDI solution was 331 mL / min.

Embodiment 3

[0083] In Example 1, grease was produced in the same manner except that the flow rate of the amine solution was 253 mL / min and the flow rate of the MDI solution was 444 mL / min.

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Abstract

A urea grease, which is obtained by shearing a liquid mixture at a shear rate of 102 s-1 or greater, said liquid mixture comprising an amine mixture containing an alicyclic monoamine and a chain aliphatic monoamine together with a diisocyanate compound, and thus reacting the liquid mixture, characterized in that, when measured by the FAG method, the urea grease shows Peak High 32-64s of 1.5 or smaller and Level High 32-64s of 10 or smaller.

Description

technical field [0001] The present invention relates to urea-based greases. Background technique [0002] Although urea-based grease has excellent heat resistance, it has a problem of poor acoustic characteristics depending on the amine used. Therefore, in the past, greases have been differentiated and used according to their applications. For example, for applications such as rolling bearings mounted in small motors for home appliances, both acoustic characteristics and heat resistance are required. [0003] Therefore, for example, a diurea grease has been proposed in which, as an amine component, an amine having a cyclohexyl group, a cyclohexyl derivative group having 7 to 12 carbon atoms, and an amine having a cyclohexyl derivative group having 6 to 12 carbon atoms are used in combination in a predetermined ratio. Amine of an alkyl group of 22 (see Patent Document 1). [0004] Existing patent documents [0005] patent documents [0006] Patent Document 1: Japanese Pat...

Claims

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Application Information

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IPC IPC(8): C10M115/08C10M177/00C10N20/00C10N30/00C10N30/04C10N40/02C10N50/10C10N70/00
CPCC10M177/00C10M2203/1006C10M2203/1025C10M2205/0285C10M115/08C10M2215/1026C10N2020/00C10N2020/069C10N2030/00C10N2020/02C10N2030/76C10N2040/02C10N2070/00C10N2050/10C10M2215/06C10M2207/026C10M2223/041C10M2223/045C10N2010/04C10M2219/068C10N2010/12
Inventor 末次义幸高根孝仁
Owner IDEMITSU KOSAN CO LTD
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