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US 9,637,704 B2Granted
Polyalkylene glycol-based industrial lubricant compositions
AssigneeVanderbilt Chemicals, LLC
InventorsJunbing Yao, Steven G. Donnelly
Life of this patent
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Abstract
A lubricant composition comprises as a lubricant base, an oil soluble polyalkylene glycol suitable for use as a lubricant in an industrial oil, grease or metal working fluid; and an additive comprising (1) alkylated phenyl-α-naphthylamine; and (2) 2,2,4-trialkyl-1,2-dihydroquinoline.
Claims7
A lubricant composition comprising
- a polyalkylene glycol lubricant base being present at 90% or more by weight of the total lubricant composition;
- and
- an additive at about 0.25-2.0% by weight of the total composition, the additive comprising
- (1) C8 alkylated phenyl-α-naphthylamine;
- and
- (2) a mixture of 1,2-dihydro-2,2,4-trimethylquinoline dimers and trimers;
- with the proviso that,
- (a) when the additive is present at about 0.25-1.0%, components (1) and (2) are present at a weight ratio from 1:1 to 3:1 , and
- (b) when the additive is present at about 1.0-2.0%, components (1) and (2) are present at a weight ratio from 1:3 to 1:1.
6 more elements
Dependencies are inferred from the claim text.