Isoparaffinic lube basestock compositions
AssigneeMobil Oil Corporation
InventorsJeffrey C. Trewella, Thomas R. Forbus, Jr., Zhaozhong Jiang, Randall D. Partridge, Suzanne Elaine Schramm
Life of this patent
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Abstract
A liquid hydrocarbon composition, containing paraffinic hydrocarbon components in which the extent of branching, as measured by the percentage of methyl hydrogens (BI), and the proximity of branching, as measured by the percentage of recurring methylene carbons which are four or more carbons removed from an end group or branch (CH.sub.2 >4), are such that: (a) BI-0.5(CH.sub.2 >4)>15; and (b) BI+0.85(CH.sub.2 >4)<45 as measured over said liquid hydrocarbon composition as a whole.
Claims21
A liquid hydrocarbon composition, comprising paraffimc hydrocarbon components in which the extent of branching, as measured by the percentage of methyl hydrogens (BI), and the proximity of branching, as measured by the percentage of recurring methylene carbons which are four or more carbons removed from an end group or branch (CH.sub.2 >4), are such that:
- (a) BI-0.5(CH.sub.2 >4)>15;
- and
- (b) BI+0.85(CH.sub.2 >4)<45;
- as measured over said liquid hydrocarbon composition as a whole.
A lubricant basestock composition, comprising paraffinic hydrocarbon components in which the extent of branching, as measured by the percentage of methyl hydrogens (BI), and the proximity of branching, as measured by the percentage of recurring methylene carbons which are four or more carbons removed from an end group or branch (CH.sub.2 >4), are such that:
- (a) BI-0.5(CH.sub.2 >4)>15;
- and
- (b) BI+0.85(CH.sub.2 >4)<45;
- as measured over said lubricant basestock composition as a whole.
A lubricating oil composition, comprising a liquid hydrocarbon composition having a mixture of paraffinic hydrocarbon components in which the extent of branching, as measured by the percentage of methyl hydrogens (BI), and the proximity of branching, as measured by the percentage of recurring methylene carbons which are four or more carbons removed from an end group or branch (CH.sub.2 >4), are such that:
- (a) BI-0.5(CH.sub.2 >4)>15;
- and
- (b) BI+0.85(CH.sub.2 >4)<45;
- as measured over said liquid hydrocarbon composition as a whole;
- and optionally, effective amounts of lubricating oil additives selected from the group consisting of antioxidants, anti-wear additives, extreme pressure additives, friction modifiers, viscosity index improvers, pour point depressants, detergents, dispersants, corrosion inhibitors, metal deactivators, seal compatibility additives, demulsifiers, anti-foam additives, and mixtures thereof.
Dependencies are inferred from the claim text.