Water-soluble metal working fluid, and coolant for metal working

摘要

A water-soluble metalworking fluid contains: at least either one of (A) a block polyalkylene glycol represented by formula (1): HO(EO)a—(PO)b-(EO)cH, and (B) a polyalkylene glycol monoether represented by formula (2): RO(R′O)dH; and (C) an alkanolamine fatty acid salt, in which EO represents —CH2CH2O — and PO represents —CH(CH3)CH2O— or —CH2CH(CH3)O—; each unit of (EO)a, (PO)b and (EO)c is block-bonded; a and c each is an integer of 1 to 30 and b is an integer of 5 to 100; R represents an alkyl group having 1 to 30 carbon atoms and R′O represents PO or EO; mole fraction of EO is less than 100%; and d is an integer of 1 or 50.

主权项

1. A water-soluble metalworking fluid, comprising:
at least either one of
a block polyalkylene glycol anda polyalkylene glycol monoether; and an alkanolamine fatty acid salt,wherein
the block polyalkylene glycol is of formula (1)
HO(EO)a—(PO)b-(EO)cH  (1),wherein EO is —CH2CH2O—,PO is —CH(CH3)CH2O— or —CH2CH(CH3)O—,each unit of (EO)a, (PO)b and (EO)c is block-bonded,a and c are each independently an integer of from 1 to 30,b is an integer of from 5 to 100,a, b, and c satisfy formula (3)
(a+c)/(a+b+c)=0.1-0.5  (3), and the polyalkylene glycol monoether is of formula (2)
RO(R′O)dH  (2),wherein R is an alkyl group having 1 to 30 carbon atoms,R′O is PO or EO,a mole fraction of EO is less than 100%, andd is an integer of from 1 to 50, the alkanolamine fatty acid salt comprises an alkanolamine comprising a tertiary amine of formula (5) wherein R2 is an alkyl group having 1 to 10 carbon atoms, andZ1 and Z2 are each independently an alkylene group having 2 to 8 carbon atoms, and the water-soluble metalworking fluid is soluble in water.