Thiadiazole components, compositions, and methods
Provided herein are compositions that include a thiadiazole component and a solubility enhancing component. The solubility enhancing component can include a dispersant, a detergent, or both a dispersant and a detergent. The thiadiazole component can include one or more species having a hydrocarbyl-disulfanyl moiety. The compositions may be used as a corrosion inhibitor. Also provided herein are methods for making a thiadiazole component and a composition.
1. A composition comprising:
a thiadiazole component comprising 5-(C 2 -C 30 hydrocarbyl-disulfanyl)-1,3,4-thiadiazole-2-thiol and 2,5-bis(C 2 -C 30 hydrocarbyl-disulfanyl)-1,3,4-thiadiazole; and
a solubility enhancing component comprising a dispersant, wherein the dispersant comprises a 1-(amino-C 2 -C 4 hydrocarbyl)-3-hydrocarbylpyrrolidine-2,5-dione having the following structure—
wherein R 3 is a monovalent hydrocarbyl having a molecular weight of about 500 to about 2500, R 4 is a divalent C 2 -C 4 hydrocarbyl, and a is 1 to 100;
wherein the weight ratio of the solubility enhancing component to the thiadiazole component is about 1:99 to about 10:90,
the weight ratio of the 5-(C 2 -C 30 hydrocarbyl-disulfanyl)-1,3,4-thiadiazole-2-thiol to the 2,5-bis(C 2 -C 30 hydrocarbyl-disulfanyl)-1,3,4-thiadiazole is about 60:40 to about 95:5, and
wherein the composition is at least substantially soluble in a group II or a group IV base oil at a concentration of the composition of about 0.01% to about 1% by weight, based on the combined weight of the composition and the base oil.
2. The composition of claim 1 , wherein the thiadiazole component comprises 5-(C 8 -C 18 hydrocarbyl-disulfanyl)-1,3,4-thiadiazole-2-thiol and 2,5-bis(C 8 -C 18 hydrocarbyl-disulfanyl)-1,3,4-thiadiazole.
3. The composition of claim 1 , wherein the thiadiazole component comprises 5-(t-nonyldisulfanyl)-1,3,4-thiadiazole-2-thiol and 2,5-bis(t-nonyldisulfanyl)-1,3,4-thiadiazole.
4. The composition of claim 1 , wherein the thiadiazole component comprises 5-(t-dodecyldisulfanyl)-1,3,4-thiadiazole-2-thiol and 2,5-bis(t-dodecyldisulfanyl)-1,3,4-thiadiazole.
5. The composition of claim 1 , wherein the solubility enhancing component consists of the dispersant.
6. The composition of claim 1 , wherein the dispersant is a borated dispersant, and boron is present in the borated dispersant in an amount of about 0.01% to about 5.0% by weight of the borated dispersant.
7. The composition of claim 1 , wherein R 4 is a divalent C 2 hydrocarbyl.
8. The composition of claim 1 , wherein a is 1 to 10.
9. The composition of claim 1 , wherein the thiadiazole component consists of the 5-(C 2 -C 30 hydrocarbyl-disulfanyl)-1,3,4-thiadiazole-2-thiol and the 2,5-bis(C 2 -C 30 hydrocarbyl-disulfanyl)-1,3,4-thiadiazole, and the solubility enhancing component consists of the dispersant.
10. A lubricating composition or a grease composition comprising:
a first composition consisting essentially of [1] a thiadiazole component consisting of 5-(C 2 -C 30 hydrocarbyl-disulfanyl)-1,3,4-thiadiazole-2-thiol and 2,5-bis(C 2 -C 30 hydrocarbyl-disulfanyl)-1,3,4-thiadiazole, and [2] a solubility enhancing component consisting of a dispersant, wherein the dispersant comprises a 1-(amino-C 2 -C 4 hydrocarbyl)-3-hydrocarbylpyrrolidine-2,5-dione having the following structure—
wherein R 3 is a monovalent hydrocarbyl having a molecular weight of about 500 to about 2500, R 4 is a divalent C 2 -C 4 hydrocarbyl, and a is 1 to 100; and
a first base oil, wherein the first composition is at least substantially soluble in the first base oil, and the first base oil comprises a group II base oil or a group IV base oil;
wherein the weight ratio of the solubility enhancing component to the thiadiazole component is about 1:99 to about 10:90, and the weight ratio of the 5-(C 2 -C 30 hydrocarbyl-disulfanyl)-1,3,4-thiadiazole-2-thiol to the 2,5-bis(C 2 -C 30 hydrocarbyl-disulfanyl)-1,3,4-thiadiazole is about 60:40 to about 95:5, and the first composition is present in the lubricating composition in an amount of about 0.01% to about 1% by weight of the lubricating composition.
11. The lubricating composition or the grease composition of claim 10 , wherein the first composition includes a second base oil that is present in the first composition in an amount of about 0.01% to about 80% by weight of the first composition.