Grease composition with improved rust prevention and abrasion resistance properties
AssigneeShell Oil Company
InventorsTakahiro Ozaki, Noriaki Shinoda, Kouichi Nakazawa
Life of this patent
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Abstract
A grease composition having a base oil and a thickener, which grease additionally has from 0.05% to 30% by weight of sodium thiosulphate and at least 0.1% by weight of one or more additives selected from the group of: calcium salicylate, magnesium salicylate, calcium phenate, and calcium sulphonate, based on the total grease composition, and use of the grease composition to improve rust prevention and abrasion resistance. The invention also relates to a method for preparing the grease composition.
Claims9
A grease composition comprising a base oil and a thickener, which grease additionally comprises from 0.05% to 30% by weight of sodium thiosulphate;
- and, at least 0.1% by weight of at least one additives selected from the group of:
- calcium salicylate, magnesium salicylate, calcium phenate and/or alcium sulphonate, based on the total grease composition.
A method of preparing a grease composition comprising a base oil and a thickener, which grease additionally comprises from 0.05% to 30% by weight of sodium thiosulphate;
- and, at least 0.1% by weight of at least one additive is selected from the group of:
- calcium salicylate, magnesium salicylate, calcium phenate and/or calcium sulphonate, based on the total grease composition, wherein said method comprises pre-mixing sodium thiosulphate and at least one additive is selected from the group of:
- calcium salicylate, magnesium salicylate, calcium phenate and calcium sulphonate, and, adding the mixture to base grease comprising base oil and thickener, or wherein sodium thiosulphate and at least one additive is incorporated individually into said base grease.
Dependencies are inferred from the claim text.