Lubricating compositions and methods for the use thereof
View Patent ↗Disclosed herein are lubricating compositions and methods of use of the same, including for, e.g., use in metalworking operations.
1. A lubricating composition comprising a partial or half-ester of DIACID 1550 according to the structure:
wherein the partial ester is derived from an esterification reaction at R 1 or R 2 with an alcohol selected from the group consisting of n-pentanol, 1-docecanol, 2-ethyl-1-hexanol, and combinations thereof, and wherein at least one of R 1 or R 2 but not both is H.
2. The lubricating composition of claim 1 , wherein the composition comprises an effective amount of the DIACID 1550 partial ester to reduce or inhibit foaming as compared to a composition comprising the same amount of a diacid having the structure
or a diester thereof.
3. The lubricating composition of claim 1 , wherein the composition comprises a semi-synthetic metalworking fluid or a full-synthetic metalworking fluid.
4. An aqueous metalworking composition comprising a metal working fluid and an effective amount of a DIACID 1550 partial ester according to the structure:
wherein the partial ester is derived from an esterification reaction at R 1 or R 2 with an alcohol selected from the group consisting of n-pentanol, 1-docecanol, 2-ethyl-1-hexanol, and combinations thereof, and wherein at least one of R 1 or R 2 but not both is H.
5. The metalworking composition of claim 4 , wherein the metalworking composition comprises a semi-synthetic metal working fluid or a synthetic metal working fluid.
6. The metalworking composition of claim 5 , wherein the metalworking composition is a semi-synthetic metalworking fluid and further includes a coupling solvent.
7. The metalworking composition of claim 6 , wherein the coupling solvent is a glycol ether.
8. The metalworking composition of claim 7 , wherein the glycol ether is tripropylene glycol methyl ether or diethylene glycol monobutyl ether.
9. The metalworking composition of claim 4 , wherein the metalworking composition and further includes a nonionic surfactant.
10. The metalworking composition of claim 9 , wherein the nonionic surfactant is at least one of a alkylphenol ethoxylate, a linear alcohol ethoxylate, or an ethoxylate of a diacid having the structure
11. The metalworking composition of claim 10 , wherein the alkylphenol ethoxylate is at least one of nonyl phenol ethoxylate and octylphenol ethoxylate.
12. The metalworking composition of claim 10 , wherein the linear alcohol ethoxylate is at least one of: tall oil fatty acid ethoxylate, and nonylephenol ethoxylate.
13. The metalworking composition of claim 4 , further comprising at least one of a biocide and a fungicide.
14. A method of lubricating a metal workpiece by applying the aqueous metalworking composition of claim 4 to the metal workpiece.
15. A metalworking process comprising performing a metalworking operation by flushing, spraying, high pressure spraying, brushing, flowing, fluting, roll coating, immersion, or any combination thereof with the aqueous metalworking composition of claim 4 .
16. A compound having the structure:
wherein R 1 and R 2 are independently selected from the group comprising H, alkyl, alkenyl, cycloalkyl, chloroalkyl, chlorocycloalkyl, polyoxyethylene, polyoxypropylene, or a mixture thereof, and wherein at least one of R 1 or R 2 but not both is H.
17. The compound of claim 16 , wherein at least one of R 1 or R 2 but not both is at least one of alkyl, alkenyl, cycloalkyl, chloroalkyl, chlorocycloalkyl, polyoxyethylene and polyoxypropylene.
18. The compound of claim 17 , wherein the compound has the structure:
19. A composition comprising the compound of claim 16 , wherein at least 10 mol % of R 1 and R 2 is H.
20. The composition of claim 19 , wherein up to 90 mol % of R 1 and R 2 are at least one of alkyl, alkenyl, cycloalkyl, chloroalkyl, chlorocycloalkyl, polyoxyethylene and polyoxypropylene.