Method for suppressing growth of mycobacteria in metalworking fluids
OwnerHarold Rossmooreinventor
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Abstract
A method for suppressing the growth of mycobacteria associated with hypersensitivity pneumonitis, in particular Mycobacterium immunogenum, in metalworking fluids is described. The method uses antimicrobial or biocidal compositions which include a metal complex comprising disodium monocopper (II) citrate and an isothiazolone mixture preferably comprising 5-chloro-2-methyl-4-isothiazolin-3-one 2-methyl-4-isothiazolin-3-one. Also described are methods for detecting and identifying the mycobacteria.
Claims9
1-17. (canceled)
A method for reducing a risk that a person in a metalworking environment will contract hypersensitivity pneumonitis caused by mycobacteria which is present in the environment, which comprises:
- (a) providing a composition comprising a copper complex comprising disodium monocopper (II) citrate and an isothiazolone mixture wherein the copper complex provides more than about 250 ppm of copper ion to the metalworking fluid;
- (b) adding the composition to metalworking fluids in the environment in an amount which is sufficient to suppress the growth of the mycobacteria in the metalworking fluid for at least 48 hours wherein the metalworking fluid containing the composition is monitored for the mycobacteria;
- and
- (c) exposing the person to the metalworking environment, wherein suppression of the growth of the micobacteria in the metalworking fluid by the composition reduces the risk that the person will contract the hypersensitivity pneumonitis.
25-37. (canceled)
Dependencies are inferred from the claim text.