Patent ID: 6706670
Filing Date: 2004-03-16
Classification: C10M,C10N

Abstract:
An aqueous composition for metal working, comprising water and a lubricating functionally effective amount of a fluid lubricant composition comprising:(a) one or more water soluble components selected from a first group (A) comprising: carboxylic acids and salts thereof wherein said carboxylic acids are mono- or polycarboxylic acids, with the provisos (1) that when said monocarboxylic acids have one to six carbon atoms optionally functionalized with a functional group selected from C1-C20 alkoxy, sulfone, alkylene phosphonates, sulfide or functionalized amines and salts or esters thereof, that said monocarboxylic acid does not include 2-hydroxybutyric acid and 3-hydroxybutyric acid; and (2) that when said carboxylic acid is represented by the formula: R1CO2Hâ€ƒâ€ƒ(I) where in connection with formula (I), R1 is hydrogen, C1-6 alkyl, or R1 is RaORbâ€”, where Ra is C6-20 linear or branched alkyl, and Rb is C1-6 linear or branched alkylene, or R1 is RcSRdâ€”, where Rc is C1-20 alkyl, and Rd is C1-6 alkylene or hydroxyalkylene, that R1 cannot be 3-carboxypropyl or 2-carboxymethyl substituted alkyl; and mercaptocarboxylic acids and salts thereof; and(b) one or more water soluble components selected from a second group (B) comprising phosphates, borates, phosphonates, phosphites and hypophosphites; with the provisos that when said group (A) component is an aliphatic di- or tri-carboxylic acid, said group (B) component is not a borate, when said group (A) component is a dicarboxylic acid, said group (B) component is not a phosphate salt, when said group (A) component is polyaspartic acid or salts thereof, said group (B) component is not a phosphate or borate, and when the group (A) component is caprylic acid, the group (B) component is not a phosphate or borate.