Small particle size oil in water lubricant fluid
AssigneeQuaker Chemical Corporation
InventorsTao Zhu, Pieter Schellingerhout, Yuming Zhang, Jiangbo Ma
Life of this patent
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Abstract
An oil in water lubricant fluid for use in steel cold rolling, comprising an oil in water emulsion having a particle size of 1 μm or less, consisting of an oil phase and water, where the oil phase includes about 5 wt % to about 40 wt % of at least one polymeric surfactant, about 25 wt % to about 95 wt % base oil, about 0.2 wt % to about 10 wt % extreme pressure lubrication additives, and about 0.5 wt % to about 6 wt % other functional additives.
Claims20
An oil in water lubricant fluid for use in steel cold rolling, comprising an oil in water emulsion, wherein the oil in water emulsion comprises:
- (a) an oil phase, comprising
- about 15 wt % to about 30 wt % polymeric surfactant, wherein at least one polymeric surfactant comprises hydrophilic blocks having a number average molecular weight of at least about 200,
- about 25 wt % to about 95 wt % base oil, and
- about 2 wt % to about 8 wt % extreme pressure lubrication additive, the extreme pressure lubrication additive being distinct from the polymeric surfactant, and
- (b) a water phase,
- wherein at least about 50% the oil phase is contained in particles with a size of less than 1 μm.
A method of cold rolling steel, comprising lubricating the steel with a lubricant fluid comprising an oil in water emulsion, wherein the emulsion comprises:
- (a) an oil phase, comprising
- about 15 wt % to about 30 wt % polymeric surfactant, wherein at least one polymeric surfactant comprises hydrophilic blocks having a number average molecular weight of at least about 200,
- about 25 wt % to about 95 wt % base oil, and
- about 2 wt % to about 8 wt % extreme pressure lubrication additive, the extreme pressure lubrication additive being distinct from the polymeric surfactant;
- and
- (b) a water phase;
- wherein at least about 50% the oil phase is contained in particles with a size of less than 1 μm.
Dependencies are inferred from the claim text.