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US 10,704,010 B2Granted
Grease and method for manufacturing grease
AssigneeIdemitsu Kosan Co., Ltd.
InventorsYoshiyuki Suetsugu, Hiromu Kumagai
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Abstract
A grease of the invention contains a base oil and a thickener, where, when the volumetric-based arithmetic mean particle size of particles contained in the grease measured using laser diffraction/scattering method is A (unit: μm), a formula A≤3 (1) is satisfied.
Claims22
A grease, comprising:
- a base oil;
- and
- a thickener comprising a urea,
- wherein:
- A (unit:
- μm) representing a volumetric-based arithmetic mean particle size of particles of the urea comprised in the grease calculated using laser diffraction/scattering method satisfies a formula (1):
- A≤1.6 (1).
4 more elements
A manufacturing method of a grease, the method comprising:
- applying a minimum shear rate of 102 s−1 or more to at least one of a first base oil comprising a first thickener precursor and a second base oil comprising a second thickener precursor;
- mixing the first base oil and the second base oil while keeping the minimum shear rate to prepare a mixture solution;
- and
- forming a thickener in the mixture solution.
1 more element
A grease, comprising a thickener formed by shearing a mixture solution of a monoamine compound and a diisocyanate compound at a minimum shear rate of 102 s−1 or more,
- wherein:
- the monoamine compound is at least one of an aliphatic monoamine and an aromatic monoamine;
- and
- A (unit:
- μm) representing a volumetric-based arithmetic mean particle size of particles comprised in the grease calculated using laser diffraction/scattering method satisfies a formula (1):
- A≤1.6 (1).
3 more elements
Dependencies are inferred from the claim text.