C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
C10M 119/18 (2006.01) C10M 173/00 (2006.01)
Patent
CA 2573578
The present invention provides a process for producing a water-miscible metalworking fluid involving combining about 90 wt.% to about wt.%, based on the weight of the fluid, of water and one or more additives chosen from plasticizers, chelating agents, biocides, surfactants, dispersants, dyes, odorants, extreme pressure agents, anti-oxidants and corrosion inhibitors with about 10 wt.% to about 95 wt.%, based on the weight of the fluid, of a polyether polyol produced by mixing an active hydrogen compound with a double metal cyanide (DMC) catalyst in a reactor vessel, charging to the reactor vessel a mixture containing two or more alkylene oxides to activate the catalyst, and continuously feeding one or more alkylene oxides to produce the polyether polyol, wherein a 1 % solution in water of the polyether polyol has a cloud point of from greater than about 32°C to less than about 53°C, the polyether polyol has a number average equivalent weight of from greater than about 1,600 Da to about 10,000 Da, and a four-hour aerosol inhalation exposure to the polyether polyol has a LC50 of greater than about 5 mg/L. The water-miscible metalworking fluid produced by the inventive process may find use in cooling and/or lubricating metal surfaces during one or more of grinding, cutting, boring, drilling and turning of metal parts.
Browne Edward P.
Combs George G.
Bayer Materialscience Llc
Norton Rose Canada S.e.n.c.r.l.,s.r.l./llp
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