Grease composition and rack-and-pinion-type steering device filled with the same grease composition
AssigneesKyodo Yushi Co., Ltd., Oiles Corporation
InventorsKota Sasaki, Daisuke Tsutsui, Shuichi Yamaguchi
Life of this patent
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Abstract
A grease composition includes a urea-based thickener; a synthetic hydrocarbon oil and/or a mineral oil as a base oil, a kinematic viscosity of the base oil at 100° C. being 4 to 40 mm2/s; and 1 to 10% by mass of a montan wax, 1 to 5% by mass of a molybdenum-based extreme pressure agent, and 1 to 5% by mass of a sulfonate-based compound as additives, and the grease composition has a consistency of 310 to 430. The grease composition is for use in lubrication between a metal member and a metal member and lubrication between a metal member and a resin member.
Claims12
A grease composition comprising:
- a urea-based thickener;
- a member selected from the group consisting of a synthetic hydrocarbon oil, a mineral oil, and a combination thereof as a base oil, a kinematic viscosity of the base oil at 100° C. being 4 to 40 mm2/s;
- and
- 2 to 5% by mass of a partially saponified montanic acid ester wax having an acid value of 5 to 15 mg KOH/g, 1 to 5% by mass of a molybdenum-based extreme pressure agent, 1 to 5% by mass of a neutral calcium sulfonate as additives, and a reaction product of N-phenylbenzenamine and 2,4,4-trimethylpentene as an antioxidant, wherein
- the grease composition has a consistency of 310 to 430,
- the grease composition is for use in lubrication between a metal member and a metal member or lubrication between a metal member and a resin member, and
- the grease composition is free of polyethylene wax.
Dependencies are inferred from the claim text.