Amine-free voc-free metal working fluid

Abstract

The present application concerns an aqueous metalworking composition comprising in a concentrate or after dilution of a concentrate with water in a diluent: 0.002 to 40 % by weight of component (a) which is a lubricity agent comprising at least one water-insoluble compound (a) having at least one hydrophobic aliphatic chain and at least one polar group and having a water solubility at 20 DEG C of less than 0.1 g / liter; 0.002 to 40 % by weight of component (b)comprising at least one water-soluble corrosion inhibiting compound(b) having a water-solubility at 20 DEG C of more than 0.1g / liter; 0.002 to 45 % by weight of at least one emulsifying and dispersing agent(c)which contains at least one emulsifying and / or dispersing compound (c) which is water-soluble, water-miscible or water-dispersable and which is selected from the group consisting of non-ionic, anionic and zwitterionic surfactants; 0.002to 30 % by weight of an alkalinity agent (d) containing at least one alkaline water-soluble compound (d) selected from the group consisting of hydroxides and carbonates; and 0.004 to 99 % by weight of a transport component(e)containing predominantly water. Further on, the present application concerns a method of use of such aqueous metalworking composition as a coolant, as a lubricant, etc., and concerns further on a method to prepare an aqueous metalworking composition and a metalworking process.

Description

[0001] This invention relates to the field of water-based metalworking compositions. technical field [0002] In particular, the present invention relates to aqueous, environmentally friendly, recyclable, synthetic, amine-free, petroleum oil-free and voc-free metalworking compositions that are highly harmless materials and compatible with a wide range of compatible metal alloys. Background of the invention [0003] Metalworking compositions are used in many metalworking operations such as cutting, grinding, forming, lapping, drawing, forming, pressing, punching, rolling, embossing, and otherwise lubricating and cooling metalworking tools, to flush metallic debris and impurities from the workpiece (if some are present), and to protect, as far as possible, the components of the tool and machine from damage, wear and corrosion. Such treatments include cutting operations exhibiting metal removal, such as grinding, turning, milling, tapping, broaching, and gear hobbing, and for...

AI Technical Summary

Problems solved by technology

However, disadvantages of existing synthetic metalworking compositions are typically problems with cleaning residues caused by added lubricity additives, reduced lubricity when compared with petroleum oil-based products on the same cost basis, increased Oil sump life and machine maintenance corrosion issues, and potential skin irritation to workers

But certain levels of petroleum oils in any metalworking composition cause several problems: 1.) Poor thermal conductivity so that it has a lower cooling effect, 2.) It allows microorganisms to grow and can be harmful to workers, 3. ) petroleum oils cause mist and residues that are difficult to wash off, 4.) disposal issues and are not environmentally friendly and 5.) water hardness can affect emulsion stability

In recent years, several amine-containing metalworking compositions have been used because amines and especially alkanolamines are helpful in antibiological action, corrosion protection and emulsion stability, but several amines are very toxic and also incorporate volatile Sexual organic compound VOC

Formation of aqueous metalworking compositions without the use of any amines is more difficult

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