초록

A biodegradable lubricant composition containing a complex polyol ester having a polyfunctional alcohol residue and a saturated or unsaturated dicarboxylic acid residue having from about 9 to about 22 carbon atoms.

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1. A lubricant composition comprising a complex polyol ester, said complex polyol ester consisting of: (a) an at least trifunctional alcohol residue;(b) a saturated or unsaturated dicarboxylic acid residue having 18 carbon atoms, and(c) optionally, one or more fatty acid residues selected from the g

1. A lubricant composition comprising a complex polyol ester, said complex polyol ester consisting of: (a) an at least trifunctional alcohol residue;(b) a saturated or unsaturated dicarboxylic acid residue having 18 carbon atoms, and(c) optionally, one or more fatty acid residues selected from the group consisting of C8, C9, C10 and C18 fatty acids,wherein said complex polyol ester exhibits improved biodegradability according to ASTM Standard 0-5864 or OECO Standard 301 B. 2. The composition of claim 1 wherein (a) is derived from a polyol selected from the group consisting of trimethylol propane, pentaerythritol, dipentaerythritol and glycerol. 3. The composition of claim 1 wherein (a) and (b) are present in a molar ratio of about 0.001:1 to about 1000: 1. 4. The composition of claim 1 wherein (a) and (b) are present in a molar ratio of about 1:1 to about 500: 1. 5. The composition of claim 1 further comprising an additive selected from the group consisting of extreme pressure additives, anti-foaming agents, pour point depressants, rust or corrosion prevention agents, oxidation inhibitors, detergents, dispersants, smoke-suppression agents, hydrocarbon diluents, stabilizers, dyes, and pigments. 6. The composition of claim 1 wherein (a) is trimethylol propane. 7. The composition of claim 1 wherein the complex polyol ester is present in the composition in an amount of from about 0.1 to about 100% by weight, based on the weight of the composition. 8. The composition of claim 1 wherein the complex polyol ester is present in the composition in an amount of from about 25 to about 100% by weight, based on the weight of the composition. 9. The composition of claim 1 wherein the complex polyol ester is present in the composition in an amount of from about 50 to about 100% by weight, based on the weight of the composition. 10. A process for enhancing the biodegradability of a lubricant composition comprising the step of adding to a lubricant, a complex polyol ester consisting of: (a) an at least trifunctional alcohol residue;(b) a saturated or unsaturated dicarboxylic acid residue having 18 carbon atoms, and(c) optionally, one or more fatty acid residues selected from the group consisting of C8, C9, C10 and C18 fatty acids,wherein said complex polyol ester exhibits improved biodegradability according to ASTM Standard 0-5864 or OECO Standard 301 B. 11. The process of claim 10 wherein (a) is derived from a polyol selected from the group consisting of trimethylol propane, pentaerythritol, dipentaerythritol and glycerol. 12. The process of claim 10 wherein (a) and (b) are present in a molar ratio of about 0.001:1 to about 1000: 1. 13. The process of claim 10 wherein (a) and (b) are present in a molar ratio of about 1:1 to about 500: 1. 14. The process of claim 10 wherein the composition further comprises an additive selected from the group consisting of extreme pressure additives, anti-foaming agents, pour point depressants, rust or corrosion prevention agents, oxidation inhibitors, detergents, dispersants, smoke-suppression agents, hydrocarbon diluents, stabilizers, dyes, and pigments. 15. The process of claim 10 wherein (a) is trimethylol propane. 16. The process of claim 10 wherein the complex polyol ester is present in the composition in an amount of from about 0.1 to less than 100% by weight, based on the weight of the composition. 17. The process of claim 10 wherein the complex polyol ester is present in the composition in an amount of from about 25 to less than 100% by weight, based on the weight of the composition. 18. The process of claim 10 wherein the complex polyol ester is present in the composition in an amount of from about 50 to less than 100% by weight, based on the weight of the composition. 19. The lubricant composition of claim 1, wherein said one or more fatty acid residues (c) are present, and are selected from the group consisting of C8, C9 and C10 fatty acids. 20. The lubricant composition of claim 10, wherein said one or more fatty acid residues (c) are present, and are selected from the group consisting of C8, C9 and C10 fatty acids.