Grease composition
AssigneeIdemitsu Kosan Co., Ltd.
InventorGo Watanabe
Life of this patent
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Abstract
Provided is a grease composition containing a base oil (A), a urea-based thickener (B), and a hardening agent for fat and/or fatty oil (C), in which particles containing the urea-based thickener (B) in the grease composition satisfy the following requirement (I), liquefy when heated to a certain temperature or higher, return to a solid state when returned to ordinary temperature after heated to a certain temperature or higher, have high responsiveness to application of shear stress, and are easily softened when shear stress is applied. Requirement (I): an arithmetic average particle diameter of the particles on an area basis as measured by a laser diffraction and scattering method is 2.0 μm or less.
Claims17
A grease composition, comprising:
- a base oil;
- a urea-based thickener;
- and
- a hardening agent for fat and/or fatty oil,
- wherein
- the hardening agent for fat and/or fatty oil is a glycerol fatty acid ester,
- the urea-based thickener is contained in particles such that an arithmetic average particle diameter of the particles on an area basis as measured by a laser diffraction and scattering method is 2.0 μm or less,
- the grease composition has a worked penetration in a range of 360 to 500, and
- a melting point of the glycerol fatty acid ester is from 50° C. to 80° C.
Dependencies are inferred from the claim text.