Patent ID: 11952552
Assignee: CASTROL LIMITED
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 15:
16. A metalworking fluid comprising:
water and an oil;
one or more compounds of formula (A):, present in an amount in the range of from 0.1% to 0.5% by weight of the fluid;
wherein R1 and R2 are independently selected from unsubstituted alkyl moieties containing from 1 to 5 carbon atoms, and wherein the compound of formula (A) contains from 5 to 12 carbon atoms; and

one or more sequestering agents comprising a compound of formula (B):, wherein R3 is a substituted alkyl group comprising one or two carbon atoms and one or two phosphonate moieties, present in an amount of from 0.01% to 0.15% by weight of the fluid.