Bio-lubricating metalworking fluid free of oils and emulsifiers

Abstract

Compositions of bio-lubricating fluids for machining operations, free of oils and emulsifiers, that have a high refrigeration and lubricating property with synergetic association of water, biopolymers and proper additives, endowing the product with biodegradability wherein said composition comprises between 0.01 and 5.0% w/w of a biopolymer, between 0.5 and 25.0% w/w of an anticorrosive additive, and additives that depend on the application of the bio-lubricating fluid, which may be anticorrosive, biocidal, antifoaming, extreme pressure, pH controlling, complexing, and other additives, and water qsp.

What is claimed is: 
     
         1 . Bio-lubricating metalworking fluid free of oils and emulsifiers comprising between 0.01 and 5.0% w/w of a biopolymer, between 0.5 and 25.0% w/w of an anticorrosive additive, and water qsp. 
     
     
         2 . Bio-lubricating metalworking fluid free of oils and emulsifiers comprising between 0.5 and 2.0% w/w of a biopolymer, between 1.5 and 6.5% w/w of an anticorrosive additive, and water qsp. 
     
     
         3 . Bio-lubricating metalworking fluid free of oils and emulsifiers comprising between 1.0 and 1.8% w/w of a biopolymer, between 2.0 and 6.0% w/w of an anticorrosive additive, and water qsp. 
     
     
         4 . Bio-lubricating metalworking fluid free of oils and emulsifiers of  claims 1  optionally comprising between 0.1 and 2.0% of a biocidal additive. 
     
     
         5 . Bio-lubricating metalworking fluid free of oils and emulsifiers of  claims 1 - 3  optionally comprising between 0.1 and 2.0% of an antifoaming additive. 
     
     
         6 . Bio-lubricating metalworking fluid free of oils and emulsifiers of  claims 1 - 3  optionally comprising between 0.5 and 10.0% of an extreme pressure additive. 
     
     
         7 . Bio-lubricating metalworking fluid free of oils and emulsifiers of  claims 1 - 3  optionally comprising between 0.5 and 10.0% of an anticorrosive additive for yellow metals. 
     
     
         8 . Bio-lubricating metalworking fluid free of oils and emulsifiers of  claims 1 - 3  optionally comprising between 0.1 and 2.0% of a chelant. 
     
     
         9 . Bio-lubricating metalworking fluid free of oils and emulsifiers of  claims 1 - 3  optionally comprising between 0.5 and 10.0% of a wetting additive or stabilizer. 
     
     
         10 . Bio-lubricating metalworking fluid free of oils and emulsifiers of  claims 1  to  3  wherein the biopolymer is selected among cellulosic thickeners, polysaccharides of bacterial origin, and starch or sucrose derivatives.