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Efficient, multi-functional, non-toxic boric acid esters, with its green, environmental protection, excellent anti-wear properties to set off the climax of the development of new anti-wear agents, nitrogen-containing boric acid ester anti-wear agents in recent years caused Worldwide friction widespread concern in academic circles. At present, the most important issue of the development of China's machinery industry is to increase efforts to develop, research and trial production of new metal cutting fluid products, the application of nitrogen-containing borate undoubtedly provides a new way of thinking to solve this problem. The synthesis of nitrogen-containing borate and applied research in the metal cutting fluid. (1) two-step application was prepared by three fatty acid diethanolamide, demanding the negative aspects of the capture of methyl law on labor protection, fire and explosion conditions, the purity of the product obtained methyl ester method similar; improve the traditional preparation process The control temperature of the reaction stage, to prepare a three-alkyl imidazolines. The improved method saves raw materials, and to avoid waste of energy. (2) the first use of boric acid ester of a new method of preparation of the target product, the initial reaction mechanism was discussed. Experimental alkyl imidazoline boric acid ester of the best preparation conditions: for lauric imidazoline boric acid ester, the ratio of n acid: dilaurate Diethanolamide: n-butanol = 1:1.3:1.2, ω oxide ether: lauric acid = 1.2%, temperature 200 ° C, the reaction 6.5 h; stearic acid / boric acid ester of oleic acid imidazoline, the ratio of n boric acid: stearic acid / oleic acid diethanolamide: n-butanol = 1:1.1:1.3, ω silica: stearic acid / oleic acid = 1.7%, temperature 240 ° C, the reaction of 8.5 h, this method has overcome the traditional direct Preparation of high temperature, high energy consumption and a long reaction time of the shortcomings boric acid ester prepared the highest yield, 49% and 42%, respectively. (3) The effects of temperature, time and material than by single factor experiments on the reaction to draw optimal preparation of the intermediates and the product; using FT-IR, MS, NMR and other methods on the structure of the product characterization. The results showed that the product spectrum with basically the same literature. (4) homemade nitrogen-containing boronic acid ester used in the cutting fluid, the design of the preparation process and the best formulation of the cutting fluid, cutting fluid, friction and wear test study results showed that: when the added amount of up to 2%, the product can significantly to improve the cutting fluid seizure load, and oleic imidazoline boric acid ester most effectively reduce the wear scar diameter, adding 1.5%, the wear scar diameter minimum, change the load, wear scar diameter change is also the smallest, reflecting the best extreme pressure and anti-wear properties. Extreme pressure and anti-wear properties of the class new cutting fluid almost been reported, the development of new cutting fluid application provides a theoretical basis. (5) homemade cutting fluid the GB performance test such cutting fluid, a number of indicators are better than the national standard, reflecting a variety of additional effects, provides a basis to broaden the application prospects of the nitrogen-containing boric acid ester.
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