Process for preparing a grease
AssigneeShell Oil Company
InventorsThomas Jakob Visser, Adam Petrus Van Zwieten, Matthias Eggenstein
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Abstract
The invention provides for a process for preparing a lubricating grease. The process can be carried out in the presence of a base oil and avoids the use of diisocyanate reagents.
Claims10
A process for preparing a lubricating grease comprising a step in which a compound of formula (a) is reacted with a compound of formula (b) to provide a compound of formula (c):
- wherein R1 is chosen from hydrocarbyl having from 1 to 30 carbon atoms, R2 is chosen from hydrocarbyl or hydrocarbylene comprising from 1 to 30 carbon atoms, R3 is chosen from hydrocarbyl comprising from 2 to 30 carbon atoms and n is an integer of 2,
- wherein the reaction of the compound of formula (a) with the compound of formula (b) is carried out in the presence of a base oil, or the compound of formula (c) is mixed with a base oil;
- and
- wherein the lubricating grease has a melting point of 180° C. or higher.
A lubricating grease comprising a compound of formula (c):
- wherein R2 is chosen from hydrocarbyl or hydrocarbylene comprising from 1 to 30 carbon atoms, R3 is chosen from hydrocarbyl comprising from 2 to 30 carbon atoms and n is an integer of 2,
- and a base oil;
- and
- wherein the lubricating grease has a melting point of 180° C. or higher.
The process for preparing a lubricating grease comprising a step in which a compound of formula (a) is reacted with a compound of formula (d) to provide a compound of formula (e):
- and a step wherein the compound of formula (e) is reacted with a compound of formula (b) to provide a compound of formula (f):
- wherein R1 is chosen from hydrocarbyl having from 1 to 30 carbon atoms, R2 is chosen from hydrocarbylene comprising from 1 to 30 carbon atoms, R3 is chosen from hydrocarbyl comprising from 2 to 30 carbon atoms, n is 2 and m is an integer of 1 or more,
- and wherein the reaction of the compound of formula (e) with the compound of formula (b) is carried out in the presence of a base oil, or the compound of formula (f) is mixed with a base oil.
Dependencies are inferred from the claim text.