Water-mixed metal working fluids containing ether pyrrolidone carboxylic acids

摘要

The invention relates to compositions containing a basic oil or base oil, 10 to 50 percent by weight of ether pyrrolidone carboxylic acids of formula (1) or the salts thereof of formula (1),;
wherein R1 represents C8-C30-alkyl, C8-C30-alkenyl, C6-C30-alyl, C7-C30-alkylaryl, M represents hydrogen, alkali metal, alkaline earth metal, or ammonium, X represents C2-C6-alkylene, or a poly(oxyalkylene) group of formula (2),
;
wherein I is a number ranging from 1 to 50, m, n are numbers ranging from 0 to 50 independently of l and independently of one another, R2, R3, and R4 independently represent hydrogen, CH3, or CH2CH3, Y represents C2-C6-alkylene, said compositions further containing a specific amount of a pH regulator/neutralizer such that a 5 percent by weight emulsion of the composition in deionized water has a pH ranging from 7 to 11.

主权项

1. A composition comprising a base oil, 10% to 50% by weight of at least one etherpyrrolidonecarboxylic acid of the formula 1 or salt thereofin which
R1 is C8—C30-alkyl, C8—C30-alkenyl, C6—C30-aryl, C7—C30-alkylaryl M is hydrogen, alkali metal, alkaline earth metal or ammonium X is C2—C6-alkylene, or a poly(oxyalkylene) group of the formula (2)in which
I is a number 1 to 50, m, n independently of I and of one another are a number from 0 to 50, R2, R3, R4 independently of one another are hydrogen, CH3 or CH2CH3 Y is C2—C6-alkylene, and also a pH regulator/neutralizing agent in an amount such that a 5% by weight emulsion of the composition in deionized water has a pH of between 7 and 11.