Process to produce low shear strength base oils
AssigneeVantage Santolubes Research LLC
InventorsThomas Reginald Forbus, Jr., Salvatore Michael Perna
Life of this patent
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Abstract
A lubricating fluid comprising a base oil, which utilizes carboxylic esters of carboxyl di-end-capped-polyethylene glycols, or a mixture thereof with carboxylic esters of carboxyl di-end-capped-polytetramethylene glycols, to improve low temperature performance, as well as minimize elastohydrodynamic shear strength, and enables the production of high efficiency fluids with enhanced low temperature properties for machines or machine elements that operate in the elastohydrodynamic regime in lubrication.
Claims23
A lubricating fluid comprising:
- a carboxyl di-ester of polyethylene glycol having the Formula:
- a carboxyl di-ester of polytetramethylene glycol having the Formula:
- wherein R1 and R2 are each independently derived from a mixture of octanoic carboxylic acid and decanoic carboxylic acid or derived from hexanoic carboxylic acid, and wherein m ranges from 2 to 12;
- and
- wherein R3 and R4 are each independently linear alkyl groups each having 5 to 11 carbon atoms, and wherein n ranges from 2 to 6.
A lubricating fluid comprising a carboxyl di-ester composition comprising a mixture of at least two different compounds selected from the group consisting of:
- a carboxyl di-ester of polyethylene glycol having the Formula:
- wherein R1 and R2 each independently comprise linear alkyl groups each having 5 to 11 carbon atoms, and wherein m ranges from 2 to 12;
- a complex carboxyl di-ester of polyethylene glycol having the Formula:
- wherein R6 and R7 each independently comprise linear alkyl groups each having 5 to 11 carbon atoms, wherein R5 comprises linear alkyl group having 24 to 36 carbon atoms, wherein o ranges from 2 to 12, and wherein p ranges from 2 to 12;
- and
- a complex carboxyl di-ester of polyethylene glycol and polytetramethylene glycol having the Formula:
- wherein R9 and R10 each independently comprise linear alkyl groups each having 5 to 11 carbon atoms, wherein R8 comprises linear alkyl group having 24 to 36 carbon atoms, wherein q ranges from 2 to 12, and wherein r ranges from 2 to 6;
- wherein a process of using the lubricating fluid comprises applying the lubricating fluid between two parts included in a machine.
A lubricating fluid comprising:
- a carboxyl di-ester of polyethylene glycol having the Formula:
- a carboxyl di-ester of polytetramethylene glycol having the Formula:
- wherein R1 and R2 are each independently linear alkyl groups each having 5 to 11 carbon atoms, and wherein m ranges from 2 to 12;
- and
- wherein R3 and R4 are each independently derived from a mixture of octanoic carboxylic acid and decanoic carboxylic acid or derived from hexanoic carboxylic acid, and wherein n ranges from 2 to 6.
Dependencies are inferred from the claim text.