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US 9,850,448 B2Granted
Polymer grease manufacturing process
AssigneeAktiebolaget Skf
InventorsJos Holsnijders, Dries Muller
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Abstract
A process for the manufacture of a lubricating grease composition, the process comprising steps of: (a) providing an essentially homogeneous liquid composition comprising a lubricating oil and a thickening polymer, and (b) flowing the liquid composition through a shear-mixing device to mix and cool the liquid composition to form a lubricating grease composition.
Claims20
A process for a manufacture of a lubricating grease composition, the process comprising steps of:
- providing an essentially homogeneous liquid composition comprising a lubricating oil and a thickening polymer;
- flowing the essentially homogeneous liquid composition through a shear-mixing device to mix and cool the essentially homogeneous liquid composition to form the lubricating grease composition,
- wherein the thickening polymer forms from 5 to 20 wt % of the essentially homogeneous liquid composition,
- wherein the liquid composition flows through the shear-mixing device along a flow-path provided with one or more temperature-controlled portions to each at least one of heat and cool the liquid composition,
- wherein the shear-mixing device comprises at least one pair of heat-transfer plates between which the liquid composition is flowed,
- wherein the surface of at least one plate is provided with surface features in a flow path of the liquid composition which act as baffles for the flow of the liquid composition, causing shear-mixing.
3 more elements
A method of manufacturing a lubricating grease composition, comprising:
- providing an essentially homogeneous liquid composition comprising a lubricating oil and a thickening polymer constituting 5 to 20 wt % of the essentially homogeneous liquid composition;
- and
- forcing the essentially homogeneous liquid composition to flow through a shear-mixing device defining a flow path having at least a first temperature-controlled portion and a second temperature-controlled portion such that the essentially homogeneous liquid composition is mixed and cooled in the first and second temperature-controlled portions to form the lubricating grease composition,
- wherein the second temperature-controlled portion is at a different temperature than the first temperature-controlled portion,
- the first and second temperature-controlled portions of the shear-mixing device each comprise at least one pair of heat-transfer plates between which the liquid composition flows,
- a baffle is defined on a surface of at least one of the heat-transfer plates and
- the baffle is arranged to deflect the flow of the liquid composition along the flow path such that the liquid composition undergoes shear in at least one of the first and second temperature-controlled portions.
4 more elements
Dependencies are inferred from the claim text.