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Grease composition

A technology of grease composition and synthetic oil, applied in the directions of lubricating composition, base material, petroleum industry, etc., can solve the problems of poor heat resistance of base oil, insufficient durability, and inability to achieve durability, etc. Excellent low temperature properties and excellent durability

Pending Publication Date: 2020-06-12
KYODO YUSHI CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the kinematic viscosity of the base oil is lowered, the torque will decrease, but the heat resistance of the base oil at high temperatures will deteriorate, and durability in high temperature environments will not be achieved.
[0004] As a method of improving low-temperature performance, for example, Patent Document 1 proposes a grease composition in which the base oil has a kinematic viscosity of 9.7mm at 40°C. 2 / s The main component is saturated aliphatic monocarboxylic acid diester of aliphatic dihydric alcohol, and the thickener is lithium soap, but it is not sufficient from the viewpoint of durability in view of the high temperature that has been increasing in recent years

Method used

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  • Grease composition

Examples

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Embodiment

[0077] The grease composition containing lithium 12-hydroxystearate as a thickener (Examples 1 to 5, 9, and Comparative Examples 1 to 7 in 10) was prepared by mixing lithium 12-hydroxystearate in base oil, heating and Dissolve, cool, and make base grease. A predetermined amount of antioxidant was mixed with the base oil, added to the base grease, mixed thoroughly, and kneaded by a three-roll mill to produce a grease composition with a penetration of 250 (JIS K2220) after 60 passes.

[0078] The grease composition containing lithium complex soap as a thickener (Example 6) is a mixture of azelaic acid and lithium hydroxide salt and 12-hydroxystearic acid and lithium hydroxide salt in base oil , heated and dissolved, cooled to make base grease. A predetermined amount of antioxidant was mixed with the base oil, added to the base grease, mixed thoroughly, and kneaded by a three-roll mill to produce a grease composition with a penetration of 250 (JIS K2220) after 60 passes.

[007...

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Abstract

A grease composition which contains a base oil (a) and a thickener (b), wherein: the base oil (a) contains two or more types of synthetic oil; at least one of these types is a low viscosity ester-based synthetic oil (c) having a kinematic viscosity at 40 DEG C of 5-15 mm<2> / s; and the kinematic viscosity of the base oil (a) at 40 DEG C is 25 mm<2> / s or less.

Description

technical field [0001] The present invention relates to a grease composition suitable for use in rolling bearings and the like. Background technique [0002] In recent years, from the viewpoint of reducing energy consumption, electrical equipment and mechanical parts used in various industries including automobiles have been increasingly required to be more efficient. Especially in mechanical parts with rotating bodies, grease is used as lubricant, and the resistance generated by the grease due to being stirred is related to the energy loss. Therefore, there is a need for grease with low resistance and excellent low torque performance, and the demand is increasing year by year. In addition, with the expansion of the use environment of mechanical parts, it is required to maintain performance in high temperature environments, and the requirements for low torque, durability in high temperature environments, and low temperature performance of greases are also higher than before...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/02C10M105/32C10M105/34C10M105/36C10M105/38C10N20/02C10N30/00C10N30/02C10N30/08C10N40/02C10N50/10
CPCC10M105/32C10M171/02C10M2205/0285C10M2207/0406C10M2207/1285C10M2207/2815C10M2207/2835C10M2207/285C10M2215/064C10M2215/1026C10N2020/02C10N2030/06C10N2040/02C10N2040/04C10N2050/10C10N2010/02
Inventor 佐藤雄太竹山佑树今井裕
Owner KYODO YUSHI CO LTD