Multifunctional lubricant additive and selection method
AssigneeKing Abdullah University of Science and Technology
InventorsSubram Mani Sarathy, Nikos Hadjichristidis, Viko Ladelta, Tsu-Fang Hong
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Abstract
A blend for lubricating a surface includes a lubricant and a polyepoxide terpolymer additive mixed with the lubricant. The polyepoxide terpolymer additive includes a first block having a group R1, a second block having a group R2, and a third block having a group R3. Group R1 includes C4H9 or C6H13, group R2 includes CH3, and group R3 includes C6H5.
Claims20
A blend for lubricating a surface, the blend comprising:
- a lubricant;
- and
- a polyepoxide terpolymer additive mixed with the lubricant,
- wherein the polyepoxide terpolymer additive includes a first block comprising group R1, a second block comprising group R2, and a third block comprising group R3, and
- wherein the group R1 includes C4H9 or C6H13, the group R2 includes CH3, and the group R3 includes C6H5.
A polyepoxide terpolymer additive for a lubricant, the polyepoxide terpolymer additive comprising:
- a group R1 that includes C4H9 or C6H13 and is obtained from a first monomer M1 that includes hexene oxide, HO, or octene oxide, OO, or lauryl glycidyl ether, LGE, or 2-ethylhexyl glycidyl ether, EHGE;
- a group R2 that includes CH3 and is obtained from a second monomer M2 that includes propylene oxide, PO;
- and
- a group R3 that includes C6H5 and is obtained from a third monomer M3 that includes styrene oxide, SO.
A method for making a blend for lubricating a surface, the method comprising:
- providing a lubricant;
- selecting a first monomer M1 to have aliphatic side chains, which simultaneously increases a solubility of a polyepoxide terpolymer additive in the lubricant and a viscosity of the lubricant;
- selecting a second monomer M2 to promote formation of a condensed polymeric film to reduce metallic contacts of rubbing surfaces between two metal surfaces;
- selecting a third monomer M3 to increase a thermal stability of the lubricant;
- making the polyepoxide terpolymer additive based on the first to third monomers (M1 to M3) by applying an organocatalytic ring-opening polymerization, ROP, process;
- and
- mixing the polyepoxide terpolymer additive with the lubricant to obtain the blend,
- wherein the polyepoxide terpolymer additive is 5% or less by mass and the lubricant is the remaining balance of the blend, and
- wherein the terpolymer additive includes a first block, which includes a group R1 of C4H9 or C6H13, a second block, which includes a group R2 of CH3, and a third block, which includes a group R3 of C6H5.
Dependencies are inferred from the claim text.