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US 11,959,042 B2Granted
Lubricant composition with improved low-temperature fluidity and method for preparing same
AssigneesHyundai Motor Company, Kia Corporation
InventorJae Hyeon Kim
Life of this patent
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Abstract
Disclosed are a lubricant composition and a method of preparing the same. The lubricant composition has improved low-temperature fluidity and includes polyalkylene glycol, a glycol ether compound, and an antioxidant.
Claims15
A lubricant composition comprising:
- an amount of about 85 to 95% by weight of polyalkylene glycol (PAG);
- an amount of about 4 to 10% by weight of a glycol ether compound;
- and
- an amount of about 1 to 5% by weight of an antioxidant,
- based on the total weight of the lubricant composition,
- wherein the glycol ether compound comprises monoethylene glycol dimethyl ether and monoethylene glycol monomethyl ether at a weight ratio of about 1:2 to 1:3.
3 more elements
A method for preparing a lubricant composition, the method comprising steps of:
- preparing an admixture comprising polyalkylene glycol (PAG) and a glycol ether compound;
- heat-treating the admixture in the presence of a catalyst;
- and
- injecting an antioxidant into a heat-treated resulting product,
- wherein the lubricant composition comprises:
- an amount of about 85 to 95% by weight of polyalkylene glycol;
- an amount of about 4 to 10% by weight of the glycol ether compound;
- and an amount of about 1 to 5% by weight of the antioxidant, based on the total weight of the lubricant composition.
5 more elements
Dependencies are inferred from the claim text.