Metal working fluid

Patent metadata

Field	Value
Publication number	US-2018291306-A1
Application number	US-201816009756-A
Country	US
Kind code	A1
Filing date	Jun 15, 2018
Priority date	Dec 23, 2015
Publication date	Oct 11, 2018
Grant date	—

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.

First claim

What is claimed is:

1 . 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 R 1 is independently C 5 -C 10 alkyl, or

wherein R 2 is independently a linear or branched C 5 -C 8 alkyl or C 6 cycloalkylene, or
(NH 2 CH 2 CH 2 ) 3 N,  (Ic)

with the proviso that the at least one amine is not pentylamine, 1,2-cyclohexanediamine, 1,6-diaminohexane, or 1,3-pentanediamine.

2 . The process of claim 1 , wherein the aqueous alkaline metal working fluid comprises about 0.2 to 15 wt. of the at least one amine, based on the total weight of the aqueous alkaline metal working fluid.

3 . The process of claim 1 , wherein the aqueous alkaline metal working fluid comprises about 1-7 wt. % of the at least one amine, based on the total weight of the aqueous alkaline metal working fluid.

4 . The process of claim 1 , wherein the aqueous alkaline metal working fluid is free of one or more of: amines comprising an ether group, triazine, dicyclohexylamine, boron and combinations thereof.

5 . The process of claim 1 , wherein the aqueous alkaline metal working fluid is prepared from a concentrate comprising more than about 15 wt. % of the at least one amine, based on the total weight of the aqueous alkaline metal working fluid.

6 . The process of claim 5 , wherein the concentrate is an oil-containing, water-emulsifiable lubricant.

7 . 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 R 1 is independently C 5 -C 10 alkyl, or

wherein R 2 is independently a linear or branched C 5 -C 8 alkyl or C 6 cycloalkylene, or
(NH 2 CH 2 CH 2 ) 3 N,  (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.

8 . The process of claim 7 , wherein the aqueous metal working fluid comprises about 1 to 7 wt. % of the at least one amine, based on the total weight of the aqueous metal working fluid.

9 . The process of claim 7 , wherein the aqueous metal working fluid remains effective against growth of Mycobacterium after exposure to a workpiece-tool contact zone working pressure of greater than about 60 psi.

10 . The process of claim 7 , wherein the at least one corrosion inhibitor comprises organic carboxylic acid having 12-16 carbon atoms, benzotriazole, sodium salt of tolyltriazole, or a combination thereof.

11 . The process of claim 7 , wherein the at least one pH buffer comprises an organic amine, a carboxylic acid, or a mixture thereof.

12 . The process of claim 7 , wherein the aqueous metal working fluid is triazine-free, dicyclohexylamine-free, and/or boron-free.

13 . The process of claim 7 , wherein the aqueous metal working fluid further comprises water, at least one pH buffer, a biocide, an emulsifier, an anti-foaming agent, or a combination thereof; and the aqueous metal working fluid comprises up to 99.5 wt. % water, based on the total weight of the aqueous metal working fluid

14 . The process according to claim 7 , wherein the C 5 -C 10 alkyl in Formula Ia comprises dimethylhexyl, ethylhexyl, heptyl, or octyl.

15 . The process according to claim 7 , wherein the C 5 -C 8 alkyl comprises pentamethylene and the C 6 cycloalkylene comprises cyclohexylene in Formula Ib.

16 . The process according to claim 7 , wherein the aqueous metal working fluid comprises at least one of about 0.05 to 2 wt. % of biocide(s), about 0.05 to 2 wt. % of anti-foaming agent(s), about 0.2 to 20 wt. % of pH buffer(s), or a combination thereof, based on the total weight of the aqueous metal working fluid.

17 . The process according to claim 7 , wherein each R 1 is independently C 6 -C 8 alkyl.

18 . 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 R 1 is independently C 5 -C 10 alkyl, or

wherein R 2 is independently a linear or branched C 5 -C 8 alkyl or C 6 cycloalkylene, or
(NH 2 CH 2 CH 2 ) 3 N,  (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.

19 . The aqueous metal working fluid of claim 18 comprising about 1 to 7 wt. % of the at least one amine, based on the total weight of the aqueous metal working fluid.

20 . The aqueous metal working fluid of claim 18 , wherein each R 1 is independently C 6 -C 8 alkyl and/or wherein each R 2 is independently C 6 -C 7 alkyl.

21 . The aqueous metal working fluid of claim 18 , further comprising water, and one or more of at least one pH buffer free of boric acid or derivatives thereof, a biocide, an anti-foaming agent, and optionally a corrosion inhibitor, an emulsifier, or a lubricant additive.

22 . The aqueous metal working fluid of claim 18 , wherein the metal working fluid is free of one or more of: amines comprising an ether group, triazine, dicyclohexylamine, boron and combinations thereof.

Assignees

• Henkel Ag & Co Kgaa

Inventors

• Kirsch Gabriel J
• Zarzycki Christine

Classifications

• C10M2207/126

  monocarboxylic · CPC title

• C10M2207/12

  having carboxyl groups bound to acyclic or cycloaliphatic carbon atoms · CPC title

• C10M2207/123

  polycarboxylic · CPC title

• C10N2040/20

  Metal working · CPC title

• C10M2207/046

  Hydroxy ethers · CPC title