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US 11,261,399 B2Granted
Lubricant composition for gear oil
AssigneeDL Chemical CO., LTD.
InventorsHyeung Jin Lee, Kyong Ju Na
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Abstract
The present invention relates to a lubricant composition, and more particularly to a lubricant composition, which includes an ethylene-alphaolefin oligomer and an alkylated phosphonium compound, thus realizing energy reduction and an increased endurance life, and which is thus suitable for use in gear oil. The lubricant composition of the present invention includes a base oil, a liquid olefin copolymer, and an alkylated phosphonium compound.
Claims8
A lubricant composition, comprising:
- 70.28 to 95.79% by weight of a base oil, 0.5 to 20% by weight of a liquid olefin copolymer, and 0.5 to 3.0% by weight of an alkylated phosphonium compound,
- wherein the base oil is at least one selected from the group consisting of mineral oil, polyalphaolefin (PAO), and ester,
- the liquid olefin copolymer has a coefficient of thermal expansion of 3.0 to 3.8, and
- the alkylated phosphonium compound is at least one selected from the group consisting of tetraoctylated phosphonium bis-ethylhexyl phosphate, tributyltetradecylphosphonium bis(2-ethylhexyl)phosphate, tetraethylphosphonium bis(2-ethylhexyl)phosphate, and tributylphosphonium bis(2-ethylhexly)phosphate, and
- wherein the lubricant composition has a SRV friction coefficient of 0.231 to 0.291.
2 more elements
Dependencies are inferred from the claim text.