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US 11,034,913 B2Granted
Metal working fluid
AssigneeHenkel AG & Co. KGaA
InventorsGabriel J. Kirsch, Christine Zarzycki
Life of this patent
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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.
Claims23
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) or (Ic):
- wherein each R1 is independently C5-C10 alkyl, or
- (NH2CH2CH2)3N, Formula Ic
- present in an effective Mycobacterium inhibiting amount of about 0.5 wt. % 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;
- 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;
- and at least one extreme pressure additive selected from phosphate esters, polysulfides, chlorinated additives and combinations thereof.
5 more elements
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 about 1.0 wt. % to 15 wt. % of at least one amine of Formula (Ia) or (Ic), and optionally (Ib), based on the total weight of the aqueous metal working fluid:
- wherein each R1 is independently C5-C10 alkyl, or
- (NH2CH2CH2)3N, Formula Ic:
- and optionally further comprising an amine of Formula (Ib):
- wherein R2 is independently a linear or branched C5-C8 alkyl or C6 cycloalkylene;
- 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;
- wherein the aqueous metal working fluid further comprises at least one extreme pressure additive selected from phosphate esters, polysulfides, chlorinated additives and combinations thereof;
- and
- wherein the aqueous metal working fluid has an alkaline pH.
7 more elements
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 branched alkyl, C7 linear alkyl, C9-C10 linear alkyl, or
- wherein R2 is independently a branched C7-C8 alkyl or a C6 cycloalkylene having the NH2 groups at ring positions 1 and 4, or
- (NH2CH2CH2)3N, Formula 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;
- wherein the aqueous metal working fluid is free of amines comprising an ether group;
- and
- wherein a content of the Mycobacterium-inhibitory amine in the aqueous metal working fluid is about 2.0 wt. % to 10 wt. %, based on the total weight of the aqueous metal working fluid;
- and wherein the aqueous metal working fluid further comprises 0.1 to 10 wt. % of at least one extreme pressure additive selected from the group consisting of phosphate esters, polysulfides, chlorinated additives and combinations thereof, wherein the aqueous metal working fluid comprises 40 to 89.9 wt. % water.
5 more elements
Dependencies are inferred from the claim text.