Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Organic -co- compound
Patent
1998-06-03
2000-11-28
Medley, Margaret
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Organic -co- compound
508527, 508530, 508551, C10M12926, C10M13316
Patent
active
061535664
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
This invention relates to basteriostatic compositions used in metal working such as cutting and grinding of metals.
It is known that aqueous metal working liquid contains, as an effective component, organic compound and hence is deteriorated or decomposed by bateria or molds. In fact, microorganismes which enter into a working liquid utilize organic oil compounds in the working liquid as a nutritive substance and multiply gradually, resulting in the putrefaction of the oil components. Therefore, an antiseptic agent is added to the working liquid to prevent it from such putrefaction. It is a recent trend to develop anti-microorganismes type metal working liquids as well as to improve the performance of the working liquid.
Examples of the antiseptic agent are organic nitrogen-containing compounds such as triazines, thiazines, isothiazolines such as Keson (trade name) and pyrizines. Phenol type compounds and boron type compounds are also envisaged.
Generally, an aqueous working liquid or coolant is poured onto a working point and is recycled. The aqueous working liquid, however, deteriorates gradually, resulting in a foul odor, the bacteria of pH which causes corrosion, as well as in a decrease of lubrication efficiency. The most serious problem is clogging of piping caused by generation of slime (mold).
The known antiseptic agents mentioned above are useful to solve the problems. However, they are not perfect insofar as they are deficient in at least one of areas of corrosion, decomposition, odor foam and waste liquid. Therefore, there is a demand to develop a bioactive type aqueous working liquid which can solve the problems, is harmful to the human body and the environment and which is easy to manage.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a bacteriostatic composition.
Another object of the present invention is to use said composition so as to provide a metal working composition and method having an improved bacteriostatic property.
In order to solve the problems, the present inventors found that additives selected from the group comprising amides and amine salts of heptanoic acid or amides, amine salts and alkylene/oxide addition compounds of undecylenic acid possess excellent bacteriostatic property in metal working liquids.
Thus, the present invention provides bacteriostatic compositions for metal working containing at least one compound as mentioned above, said compositions being used in aqueous or emulsion type metal working liquids.
The additive according to the present invention is selected from the group comprising amides and amine salts of heptanoic acid and amides, amine salts and alkyleneoxide addition compounds of undecylenic acid.
Derivatives of heptanoic acid are selected among: ##STR1## in which R.sub.1 and R.sub.2, identical or different, represent H, a C.sub.1-20 alkyl group or a C.sub.1-20 alkyl group having a hydrophilic group, and salt.
Derivatives of undecylenic acid are selected among: ##STR2## in which R.sub.1 and R.sub.2, identical or different, represent H, a C.sub.1-20 alkyl group or a C.sub.1-20 alkyl group having hydrophilic group, salt, and ##STR3## in which X represents H or a methyl group and n represents an integer of 1 to 50.
Amides and amine salts of heptanoic or undecylenic acid can be easily prepared by a reaction between the corresponding acid and an organic nitrogen-containing compound such as monoalkylamine and dialkylamine of carbon number of 1 to 20, cyclohexylamine, dicyclohexyl amine, or those whose alkyl has at least one hydrophilic group such as monoethanol amine or diethanol amine.
Alkylene/oxide addition compounds of undecylenic acid can be prepared by a reaction between undecylenic acid and the corresponding alkylene/oxide compound.
When more than two compounds are selected and combined in the group comprising amides and amine salts of heptanoic acid and amides, amine salts and alkylene/oxide addition compounds of undecylenic acid, the ratio of these derivatives of heptanoic acid and undecylen
REFERENCES:
patent: 3375164 (1968-03-01), Mulinos
patent: 3769214 (1973-10-01), Davis
patent: 4759861 (1988-07-01), Ogura et al.
patent: 5171903 (1992-12-01), Koyama et al.
patent: 5441979 (1995-08-01), Oppong
patent: 5670160 (1997-09-01), Eggensperger et al.
Caupin Henri-Jean
Hatanaka Toshifumi
Kawamura Tetsushi
Yonekura Aki
Elf Atochem S.A.
Medley Margaret
Toomer Cephia D.
LandOfFree
Bacteriostatic compositions and use in metal working fluids does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Bacteriostatic compositions and use in metal working fluids, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bacteriostatic compositions and use in metal working fluids will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1725810