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US 2013/0096040 A1Published application
Gear lubricant
AssigneeChevron U.S.A. Inc.
InventorEtho Satish Lalla
Life of this patent
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Abstract
A gear oil composition is provided. The composition comprises a major amount of base oil comprising a mixture of a mineral base oil and polybutene; and 0.1 to 0.5 wt % of carbon black, based on the total weight of the gear oil composition. Such compositions can provide improved viscosity stability.
Claims15
A gear oil composition, comprising:
- a) a major amount of base oil comprising a mixture of a mineral base oil and polybutene;
- b) 0.1 to 0.5 wt % of carbon black, based on the total weight of the gear oil composition;
- and
- c) 0.001 to 30 wt % of at least one additive selected from dispersants, detergents, anti-foaming agents, antioxidants, rust inhibitors, metal passivators, extreme pressure agents, friction modifiers, and mixtures thereof, based on the total weight of the gear oil composition.
1 more element
A method for improving viscosity stability of a gear oil composition, comprising adding 0.1 to 0.5 wt % of carbon black, based on the total weight of the gear oil composition, to a major amount of base oil comprising a mixture of a mineral base oil and polybutene.
Dependencies are inferred from the claim text.