SENSITIVITY OF ALKYL PHENOTHIAZINE WITH DIFFERENT BASE OILS AND COMPATIBILITYWITHTYPICALANTIOXIDANTS

Abstract

Abstract: The sensitivity characteristics of alkyl phenothiazine antioxidants in different types of base oils compared with traditional diphenylamine antioxidants were investigated by rotating oxygen bomb test and pressurized differential scanning calorimetry. The compounding pattern of alkyl phenothiazine antioxidants with other types of antioxidants was investigated，using the mixture design method in response to the initial oxidation temperature, oxidation induction period, and rotating oxygen bomb time. The results show that the antioxidant performance of alkyl phenothiazine insynthetic hydrocarbon base oils is better than that of traditional diphenylamine antioxidant,but opposite sensibility for polyol ester base oils. The combination of alkyl phenothiazine antioxidants and amine antioxidants L06 and L01 shows a synergistic effect in improving the initial oxidation temperature and the time of rotating oxygen bomb of oil products. Alkyl phenothiazine antioxidants only have synergistic effect with L01 in improving the oxidation induction time. In different antioxidant tests, the combination of alkyl phenothiazine antioxidant and phenolic antioxidant L135 all showed antagonistic effect.

Key words: lubricant, antioxidant, alkyl phenothiazine, compatibility, mixture design

References

[1] COHEN G, MURPHY C M, O'REAR J G, et al. Aliphatic Esters - Properties and Lubricant Applications [J]. Industrial & Engineering Chemistry, 1953, 45(8): 1766-1775. [2] 薛卫国，周旭光. 胺类抗氧剂综述[J]. 合成润滑材料，2014，41(4)：26-30. [3] KAIMAI T, TAKAHASHI H. Lubricant for refrigerating machine employing ammonia refrigerant [P]. America: US6875730 B2, 2005-05-04. [4] ELLIOTT J, EDWARDS E. Synthetic Lubricants for Gas Turbines: An Abridged Version of a Paper Recently Presented at the Institute of Petroleum [J]. Aircraft Engineering and Aerospace Technology, 1961, 33(3): 68-69. [5] 罗意. 合成润滑油添加剂的烷基化催化剂研究进展[J]. 润滑油，2017，32(30)：44-48. [6] STRANGE H O, MCGRATH J J, PELLEGRINI J P. Improved Phenothiazine Antioxidants for Synthetic Lubricants [J]. I&EC Product Research and Development, 1967, 6(1): 33-35. [7] 蒋云涛，张擎，刘美欣，等. 吩噻嗪及其衍生物的合成和应用[J]. 染料与染色，2010，47(3)：35-41+49. [8] 王辉，吴祖望，李春诚，等. 3,7-二异辛基吩噻嗪在润滑油中的抗氧化性能及其复配增效作用的研究[Z]. 海口：中国石油润滑油科技情报站，2005. [9] 丁东源，蔡涛，王建龙，等. 3,7-二(1-甲基-1-苯乙基)-吩噻嗪的合成及抗氧化性能[J]. 广东化工，2016，43(7)：54-55+68. [10] 张辉，李新华. 液态烷基化吩噻嗪和二苯胺混合物及其制备方法和应用[P]. 中国专利：CN200610083444.1，2007-12-05. [11] 王辉. 烷基吩噻嗪的合成及在润滑油中抗氧化性能的研究[D]. 辽宁：大连理工大学, 2009. [12] CHASAN D, NG E. Phenothiazine Derivatives as Antioxidants for Engine Oils [J]. Tribology Online, 2010, 5(4): 220-224. [13] VANN W D, FARNG L O, GALIANO-ROTH A S, et al. Lubricant containing a synergistic combination of rust inhibitors, antiwear agents, and a phenothiazine antioxidant [P]. America: US20040192563, 2004-09-30. [14] 苏朔，段庆华，周涵，等. 抗氧剂组合物, 润滑油组合物及提高润滑油抗氧性能的方法[P]. 中国专利：CN104059717B，2019-02-01. [15] CHAO T S, HUTCHISON D A, KJONAAS M. Some synergistic antioxidants for synthetic lubricants [J]. Industrial & Engineering Chemistry Product Research and Development, 1984, 23(1): 21-27. [16] 曹昕，费红. 添加剂对提高聚醚类润滑油闪点的实验研究[J]. 化工时刊，2012，26(12)：17-19.