Synthesis of Polymethacrylates Used as Multifunctional Lubricating Oil Additives  

作　　者：Liu Yinong Fan Lichuang Duan Qinghua 

机构地区：[1]SINOPEC Research Institute of Petroleum Processing

出　　处：《China Petroleum Processing & Petrochemical Technology》2015年第2期69-75,共7页中国炼油与石油化工（英文版）

摘　　要：In this paper, four kinds of polymethacrylates(PMAs) used as multifunctional additives were synthesized from quaternary C1—C14 methacrylate, among which sample 4 exhibited relatively better performance. According to the methacrylate ratio of sample 4, the optimized reaction conditions of PMA were explored by orthogonal experiments comprising 4 factors and 3 levels, and the optimized reaction conditions covered an initiator dosage of 0.8 %, a molecular weight regulator dosage of 0.4%, a reaction temperature of 95 ℃ and a reaction time of 8.5 h. When the optimized PMA samples were used to formulate the 75W/90 automotive gear base oil, they exhibited improved shear stability and good low temperature property. In comparison with foreign commercial polymethacrylate GP, the optimized PMA samples exhibited better thickening ability, similar shear stability and slightly weak low temperature property, with their performance being the same as GP's on the whole. The slight difference in the performance between the optimized PMA and GP was attributed to the difference of chain length of copolymers and the distribution of relative molecular mass between them.In this paper, four kinds of polymethacrylates （PMAs） used as multifunctional additives were synthesized from quaternary C1--C14 methacrylate, among which sample 4 exhibited relatively better performance. According to the methacrylate ratio of sample 4, the optimized reaction conditions of PMA were explored by orthogonal experiments comprising 4 factors and 3 levels, and the optimized reaction conditions covered an initiator dosage of 0.8 %, a molecular weight regula- tor dosage of 0.4%, a reaction temperature of 95 ℃ and a reaction time of 8.5 h. When the optimized PMA samples were used to formulate the 75W/90 automotive gear base oil, they exhibited improved shear stability and good low temperature property. In comparison with foreign commercial polymethacrylate GP, the optimized PMA samples exhibited better thick- ening ability, similar shear stability and slightly weak low temperature property, with their performance being the same as GP＇s on the whole. The slight difference in the performance between the optimized PMA and GP was attributed to the difference of chain length of copolymers and the distribution of relative molecular mass between them.

关 键 词：POLYMETHACRYLATE thickening ability shear stability low temperature property 

分 类 号：TE624.82[石油与天然气工程—油气加工工程] O632.52[理学—高分子化学]