Titanium complex grease composition including performance additives and process for preparation thereof
AssigneeIndian Oil Corporation Limited
InventorsAnoop Kumar, S. C. Nagar, Kanta Prasad Naithani, M. M. Rai, Akhilesh Kumar Bhatnagar
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Abstract
A lubricating grease composition includes from 2 to 20% by weight of titanium alkoxide; from 2 to 20% by weight of carboxylic acid other than fatty acid; from 5.0 to 35.0% by weight of fatty acids; from 0.0 to 5.0% by weight of water; from 20 to 90% by weight of oil selected from the group consisting of mineral and synthetic oil; and from 0.01 to 50% of performance additives.
Claims8
A lubricating grease composition, comprising:
- from 2 to 20% by weight of titanium alkoxide;
- from 2 to 20% by weight of carboxylic acid other than a fatty acid;
- from 5.0 to 35.0% by weight of fatty acids;
- from 0.0 to 5.0% by weight of water;
- from 20 to 90% by weight of oil selected from the group consisting of mineral and synthetic oil;
- and
- from 0.01 to 50% by weight of at least one performance additive comprised of an extreme pressure additive which comprises zinc dialkyl dithiaphosphate in combination with a solid lubricant which comprises sulfurized fat.
A process for preparation of a lubricating grease composition, comprising the steps of:
- forming a mixture in a first stage by adding together fatty acid, carboxylic acid other than a fatty acid and one of mineral or synthetic oil;
- stirring and heating the mixture to a temperature ranging from 70 to 100° C.;
- adding titanium alkoxide to the mixture in a second stage while maintaining said temperature;
- forming a thickened grease product by raising the temperature to from 100 to 200° C.;
- cooling said thickened grease product;
- optionally adding water to the thickened grease product in a third stage;
- subjecting the thickened grease mixture to shearing;
- adding at least one performance additive comprised of an extreme pressure additive which comprises zinc dialkyl dithiaphosphate in combination with a solid lubricant which comprises sulfurized fat at a temperature ranging from 60 to 160° C. while cooling;
- and
- subjecting the thickened grease mixture after cooling to at least one of homogenizing or milling.
A process for the preparation of a lubricating grease composition, comprising:
- preparing a mixture in a first stage by adding together fatty acid, carboxylic acid other than a fatty acid, titanium alkoxide and an oil selected from the group consisting of mineral and synthetic oil;
- heating said mixture to a temperature ranging from 160 to 200° C.;
- cooling said mixture to a temperature ranging from 100 to 140° C.;
- optionally adding water to the mixture after cooling in a second stage;
- stirring said mixture after cooling;
- further cooling said mixture;
- adding at least one performance additive comprised of an extreme pressure additive which comprises zinc dialkyl dithiaphosphate in combination with a solid lubricant which comprises sulfurized fat to the mixture after further cooling;
- and
- subjecting the mixture to shearing.
Dependencies are inferred from the claim text.