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US 2017/0121629 A1Published application
Defoaming agent and associated methods of use
AssigneeShell Oil Company
InventorsZhou XU, Wensi SONG
Life of this patent
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Abstract
Defoaming agents comprising a silicone oil and silica particulates, lubricating oil compositions comprising the defoaming agent, methods of lubrication using a lubricating oil composition comprising the defoaming agent, and methods of reducing the foaming tendency/stability and/or improving the air release rates of non-aqueous fluids, such as lubricant oils, are provided.
Claims20
A lubricating oil composition comprising:
- a base oil;
- and
- a defoaming agent comprising (a) a silicone oil and (b) silica particulates.
A method comprising:
- applying a lubricating oil composition comprising a base oil;
- and a defoaming agent comprising (a) a silicone oil and (b) silica particulates to a surface in relative movement to another surface.
A method of decreasing the foaming tendency or foaming stability of a non-aqueous fluid comprising:
- providing a non-aqueous fluid having a first foaming tendency or foaming stability as measured according to ASTM D892;
- and
- adding a defoaming agent comprising a silicone oil and silica to the non-aqueous fluid so as to reduce the first foaming tendency or foaming stability to a second foaming tendency or foaming stability.
A method of improving the air release rate of a non-aqueous fluid comprising:
- providing a non-aqueous fluid having a first air release rate as measured according to ASTM D3427;
- and
- adding a defoaming agent comprising a silicone oil and silica particulates to the non-aqueous fluid so as to increase the first air release rate to a second air release rate by reducing air release time.
Dependencies are inferred from the claim text.