Metalworking oil composition and metalworking method
Provided are: a metalworking oil composition having excellent workability and rust inhibiting performance, which is prepared by blending (A) at least one carboxylate selected from a polyhydric alcohol ester of a monocarboxylic acid and a monohydric alcohol ester of a polycarboxylic acid, (B) a phosphorus-containing compound, and (C) a rust inhibitor, wherein the monocarboxylic acid has 9 or more and 21 or less carbon atoms, and the content of the carboxylate is 0.6% by mass or more based on the total amount of the composition; and a metalworking method using the composition.
1. A metalworking oil composition:
comprising, as blended therein:
(A) 1-3.6 mass % of at least one fully esterified carboxylate selected from the group consisting of a polyhydric alcohol ester of a monocarboxylic acid;
(B) about 0.3-0.33 mass % of a triaryl phosphate; and
(C) 0.3-1 mass % of at least one rust inhibitor selected from the group consisting of a sulfonate amine salt, an acylsarcosine compound and an imidazole compound,
wherein: the monocarboxylic acid has 9 or more and 21 or less carbon atoms.
2. The metalworking oil composition according to claim 1 , wherein the polyhydric alcohol constituting the polyhydric alcohol ester of a monocarboxylic acid is an aliphatic polyhydric alcohol.
3. The metalworking oil composition according to claim 1 , wherein the monocarboxylic acid has 12 or more and 20 or less carbon atoms.
4. The metalworking oil composition according to claim 1 , wherein the monocarboxylic acid has 12 or more and 18 or less carbon atoms.
5. The metalworking oil composition according to claim 1 , wherein the polycarboxylic acid has 3 or more and 18 or less carbon atoms.
6. The metalworking oil composition according to claim 1 , wherein the monohydric alcohol constituting the monohydric alcohol ester of a polycarboxylic acid is an aliphatic monohydric alcohol.
7. The metalworking oil composition according to claim 1 , wherein the polycarboxylic acid constituting the monohydric alcohol ester of a polycarboxylic acid is an aromatic carboxylic acid.
8. The metalworking oil composition according to claim 1 , wherein the monohydric alcohol constituting the monohydric alcohol ester of a polycarboxylic acid is an aliphatic alcohol having 9 or more and 21 or less carbon atoms.
9. The metalworking oil composition according to claim 1 , wherein the (B) phosphorus-containing compound is at least one selected from the group consisting of a phosphate, an acid phosphate, a phosphite, an acid phosphite, and a phosphate amine salt.
10. The metalworking oil composition according to claim 1 , further comprising:
(D) at least one base oil selected from the group consisting of a mineral oil and a synthetic oil, each having a kinematic viscosity at 40° C. of 0.5 mm 2 /s or more and 20 mm 2 /s or less.
11. The metalworking oil composition according to claim 1 , which is adapted to function as a working oil for plastic working.
12. A metalworking method, comprising metal working a metal in contact with the metalworking oil composition of claim 1 .
13. The metalworking oil composition according to claim 1 , wherein the rust inhibitor is at least one selected from the group consisting of an alkylamine compound, a sulfonate amine salt, and an acylsarcosine compound.
14. The metalworking oil composition according to claim 1 , wherein the rust inhibitor is an alkylamine compound.
15. The metalworking oil composition according to claim 1 , wherein the rust inhibitor is a sulfonate amine salt.
16. The metalworking oil composition according to claim 1 , wherein the rust inhibitor is an acylsarcosine compound.
17. The metalworking oil composition according to claim 1 , wherein the rust inhibitor is an imidazole compound.