Metal-working oil composition

Claim 1

An aqueous metal-working lubricating composition, consisting essentially of: a stable dispersion of oil in water of: (a) at least one lube-oil component selected from the group consisting of animal or vegetable oils or fats, mineral oils and fatty acid esters; and (b) at least one water-soluble polymer compound selected from the group consisting of (1) a homopolymer of (meth)acrylamide, (2) a copolymer of (meth)acrylamide and another monomer, and (3) salts and quaternary ammonium salts of said homopolymer and copolymer, each having a molecular weight of from 1,000 to 10,000,000; wherein the other monomer is at least one monomer selected from the group consisting of monomers of formula (i) to (x), the salts thereof and monomers represented respectively by the following formulae (xi) to (xv): (i) ##STR10## wherein R 1 is H or CH 3 , and R 2 and R 3 individually H or an alkyl group having 1 to 3 carbon atoms; (ii) ##STR11## wherein m 1 is 1 to 3, n 1 is 1 to 3, and R 1 , R 2 and R 3 are as defined in Formula (I); (iii) ##STR12## wherein R 4 is H or C 1 -C 3 alkyl or alkylol; and R 1 is as defined in Formula (I); (iv) ##STR13## wherein m 2 and n 2 are 0 to 3, and R 1 , R 2 and R 3 are as defined in Formula (I): (v) ##STR14## wherein A is --O-- or --NH--, and R 1 , R 2 , R 3 and n 1 are as defined respectively in Formulas (I) and (II): (vi) ##STR15## wherein R 1 , R 2 , R 3 and n 1 are as defined respectively in Formulas (I) and (II); (vii) ##STR16## wherein R 1 is as defined in Formula (I), and the positions of substitution of the pyridine are the 2nd and 4th-positions; (viii) ##STR17## wherein R 1 and R 2 are as defined in Formula (I), and the positions of substitution of the piperidine are the 2nd- or 4th-positions; (ix) ##STR18## wherein R 1 , R 2 and R 3 are as defined in Formula (I); (x) ethyleneimine: (xi) α,β-unsaturated carboxylic acids and their salts and derivatives; (xii) sulfo-containing vinyl compounds and their salts; (xiii) acrylonitrile, (xiv) vinylpyrrolidone; and (xv) aliphatic olefins having 2 to 20 carbon atoms.