Metal working fluid
AssigneeHenkel AG & Co. KGaA
InventorsGabriel J. Kirsch, Christine Zarzycki
Life of this patent
Estimating the term…
Abstract
Aqueous metal working fluids, concentrates thereof, and processes to reduce the presence of Mycobacterium in the aqueous metal working fluids, or in a metal working environment.
Claims22
A process for reducing the concentration of Mycobacterium in an aqueous alkaline metal working environment, comprising providing to the metal working environment an aqueous metal working fluid incorporating an effective Mycobacterium inhibiting amount of at least one amine of Formula (Ia), (Ib) or (Ic):
- wherein each R1 is independently C5-C10 alkyl, or
- wherein R2 is independently a linear or branched C5-C8 alkyl or C6 cycloalkylene, or
- (NH2CH2CH2)3N, (Ic)
- with the proviso that the at least one amine is not pentylamine, 1,2-cyclohexanediamine, 1,6-diaminohexane, or 1,3-pentanediamine.
A process for shaping a metal workpiece comprising:
- contacting a metal workpiece with a metal working tool in the presence of an aqueous metal working fluid comprising at least one amine of Formula (Ia), (Ib) or (Ic):
- wherein each R1 is independently C5-C10 alkyl, or
- wherein R2 is independently a linear or branched C5-C8 alkyl or C6 cycloalkylene, or
- (NH2CH2CH2)3N, (Ic)
- present in an amount of about 0.2 to 15 wt. % of the at least one amine, based on the total weight of the aqueous metal working fluid, with the proviso that the at least one amine is not pentylamine, 1,2-cyclohexanediamine, 1,6-diaminohexane, or 1,3-pentanediamine;
- wherein the aqueous metal working fluid is free of amines comprising an ether group;
- and
- wherein the aqueous metal working fluid has an alkaline pH and further comprises at least one workpiece corrosion inhibitor.
An aqueous metal working fluid having an alkaline pH and comprising at least one Mycobacterium-inhibitory amine of Formula Ia, Ib or Ic:
- wherein each R1 is independently C5-C10 alkyl, or
- wherein R2 is independently a linear or branched C5-C8 alkyl or C6 cycloalkylene, or
- (NH2CH2CH2)3N, (Ic)
- with the proviso that the at least one amine is not a secondary amine, pentylamine, 1,2-cyclohexanediamine, 1,6-diaminohexane, or 1,3-pentanediamine;
- and
- wherein a content of the Mycobacterium-inhibitory amine in the aqueous metal working fluid is about 0.2 to 15 wt. %, based on the total weight of the aqueous metal working fluid.
Dependencies are inferred from the claim text.