Water-soluble metalworking fluid for extreme pressure additives

摘要

PURPOSE:To titled material, obtained by mixing a specific animal or vegetable fat or oil with fatty acid ester and glycerol ester to give a specific iodine value andsulfurizing the resultant mixture having improved extreme pressure properties, abrasion resistance and compatibility with an oily agent and suitable to an extreme-pressure additive for metal working. CONSTITUTION:A sulfurized material obtained by mixing (A) 5-90wt.% animal or vegetable fat or oil having 60-140 iodine value, e.g. cod oil, with (B) 5-90wt.% fatty acid ester expressed by the formula (R is 11-23C alkyl, etc.; R' is 1-24C alkyl, etc.), e.g. methyl laurate, and (C) 5-40 wt.% glycerol mono- or diester of a 12-24C saturated or uhsaturated fatty acid, e.g. lauric acid, to give a mixture having 60-110 iodine value, heating the resultant mixture at, e.g. 150-200 deg.C, adding 4-30 wt.% granular or powdery sulfur thereto and reacting them for 3-30 hr while stirring.