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采用油酸与二乙醇胺和硼酸为原料,以DNW型树脂做催化剂,在155～160℃,减压的条件下合成了含氮硼酸脂润滑油添加剂,研究了催化剂和反应时间对反应出水量和产物收率的影响。在原料配比恒定,催化剂用量为7%,减压脱水反应6.5 h的条件,收率可达到91.7%。用FT-IR表征了含氮硼酸酯的结构,四球试验机和SEM测试含氮硼酸酯的摩擦学性能,并考察了水解稳定性和相溶性。结果表明:含氮硼酸脂润滑油添加剂具有良好的水解稳定性和相溶性,能显著提高基础油的抗磨极压性能,当添加量为1%时,磨斑直径和能够减小到0.39 mm,最大无卡咬负荷(PB)提高到510 N。
Using oleic acid, diethanolamine and boric acid as raw materials, a DNB type resin was used as a catalyst to synthesize a nitrogenous borate grease additive at a reduced pressure of 155-160 ° C. The effect of the catalyst and the reaction time on the reaction effluent volume and Effect of product yield. Under the conditions of constant raw material ratio, catalyst dosage of 7% and vacuum dehydration reaction of 6.5 h, the yield can reach 91.7%. The structure of the boronic acid containing boronic ester was characterized by FT-IR. The tribological properties of the boric acid ester containing the four borosilicate test machine and the SEM were also investigated. The hydrolytic stability and compatibility were also investigated. The results show that the additive of boric acid containing boric acid has good hydrolytic stability and miscibility, and can significantly improve the extreme pressure resistance of the base oil. When the adding amount is 1%, the diameter of the burr can be reduced to 0.39 mm , The maximum card-free bite load (PB) increased to 510 N.