| 摘要 |
Disclosed is a metal working composition comprising a major amount of water and a minor amount of an additive comprising (A) at least one carboxylic ester characterized by the formula wherein R0 is hydrogen, methyl, ethyl, -CH2COOR2 or -CH2CO(OCHR5CH2)nOR6, R1 is hydrogen, methyl or ethyl, R2 is an alkyl group containing from 1 to 12 carbon atoms, R3 is hydrogen or -CO(OCHR5CH2)nOR6, R5 is hydrogen or a methyl group, R6 is an aliphatic group containing from 4 to 30 carbon atoms or a phenyl or aliphatic substituted phenyl group wherein the aliphatic substituent contains from 1 to 8 carbon atoms, R4 is -COOR2, or -CO(OCHR5CH2)nOR6 and n is an integer of from 1 to 30; with the proviso that when R0 does not equal hydrogen, methyl or ethyl that R1 and R3 are hydrogen and (B) at least one rust inhibitor comprising (1) an amine acid salt or amide; (2) a nitrogen-containing, phosphorus-free carboxylic composition; (3) an amine; or (4) an alkoxylated amine.
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