Metal working fluids
AssigneeQuaker Chemical Corporation
InventorsHendrik Laurens Mulder, Robertus Petrus Jozef Maria Smits, Nicolaas Leonardus Johanna Maria Broekhof
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Abstract
Metal working fluids being oil-in-water emulsions comprising alkylated polyvinylpyrrolidones as surfactants for emulsifying the oil in water. The alkylated polyvinyl-pyrrolidones having a molecular weight of about 1,000 up to 50,000 provide emulsions showing a high emulsion stability under varying and severe processing conditions of metal working fluids. Further, advantages of the metal working fluids are the narrow distribution of the droplet size, the high stability against varying temperature, the high stability against varying quality/composition of the make-up water, a high capacity of dispersing metal fines in the metal working fluid as well as excellent film forming characteristics.
Claims21
Metal working process which comprise applying to using a metal surface an effective amount of an oil-in-water emulsion and one or more alkylated polyvinylpyrrolidones as a metal working fluid.
Metal working fluid being an oil-in-water emulsion comprising one or more alkylated polyvinylpyrrolidones as well as a lubricant comprising either a corrosion inhibitor or an extreme pressure additive.
Dependencies are inferred from the claim text.