| abstract |
Fine suspended matter is removed from a cutting oil or aqueous cutting fluid by adding to it a small amt. of a fatty polyquaternary ammonium salt of formula: (R is the hydrocarbyl group of the polymeric fatty acids R(COOH)n obtained by polymerisation of unsatd. higher fatty acids; R1 is a 1-6C aliphatic hydrocarbyl group; X is an anion; Y is a 1-8C alkylene group; m is 3 or 4; n is 2 or 3, and p is 0, 1 or 2. |