Multifunctional lubricant additive and selection method
AssigneesKing Abdullah University of Science and Technology, Saudi Arabian Oil Company
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 co(ter)polymer additive mixed with the lubricant. The polyepoxide co(ter)polymer additive includes a first block having monomer M1 and a second block having monomer M2. The first monomer M1 includes hexene oxide, HO, or octene oxide, OO, and the second monomer M2 includes propylene oxide, PO.
Claims20
A blend for lubricating a surface, the blend comprising:
- a lubricant;
- and
- a polyepoxide co(ter)polymer additive mixed with the lubricant,
- wherein the polyepoxide co(ter)polymer additive includes a first block comprising monomer M1 and a second block comprising monomer M2, and
- wherein the first monomer M1 includes hexene oxide, HO, or octene oxide, OO, and the second monomer M2 includes propylene oxide, PO.
A polyepoxide co(ter)polymer additive for a lubricant, the polyepoxide co(ter)polymer additive comprising:
- 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 second monomer M2 that includes propylene oxide, PO;
- and
- 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 co(ter)polymer 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 co(ter)polymer additive based on the first to third monomers (M1 to M3) by applying an organocatalytic ring-opening polymerization, ROP, process;
- and
- mixing the polyepoxide co(ter)polymer additive with the lubricant to obtain the blend,
- wherein the polyepoxide co(ter)polymer additive is 5% or less by mass and the lubricant is the remaining balance of the blend.
Dependencies are inferred from the claim text.