低温液压油用黏度指数改进剂氢化丁二烯异戊二烯共聚物的合成.pdf

液压气动与串封/2016年03期
doi:10.3969/1lsn.1008-0813.2016.03.019
低温液压油用黏度指数改进剂氢化
丁二烯异戊二烯共聚物的合成
张雪涛…2,刘洋2,苗新峰2,刘中国2,孔令杰,2
(1.中国石油润滑油重点实验室,辽宁大连116031;2.中国石油大连润滑油研究开发中心,辽宁大连116031)
摘要:该文采用正丁基锂/四氢呋喃环己烷体系引发丁二烯异成二烯共聚合得到了丁二烯异成二烯共聚物(BIR),采用2-乙基己酸
镍/三乙基铝催化体系对其加氢,得到了不同微观结构与分子量的氢化丁二烯异戊二烯共聚物(HBIR)。聚合物的分子量及其分布采
用凝胶渗透色谱(CPC)表征,微观结构采用H-NMR表征,热稳定性采用热重分析(TGA)进行表征。将HBIR溶解在150SN中,考察了
微观结构和分子量对增稠能力、剪切稳定性和低温启动性的影响,以及与降凝剂的配伍效果。以HBIR为黏度指数改进剂,调配了不
同黏度级别的低温液压油,HBIR可使油品的黏度指数有很大的提升,而对油品的倾点几乎无影响
关键词:低温液压油;黏度指数;改进剂;氢化丁二烯异戊二烯共聚物
中图分类号:TH137;TH17;TQ333
文献标志码:A文章编号:1008-0813(2016)03-0058-05
Synthesis of Hydrogenated Butadiene Isoprene Copolymers as Viscosity Index
Improvers for Low Temperature Hydraulic Oil
ZHANG Xue-tao, LIU Yang=, MIAO Xin-feng, LLU Zhong-guo, KONG Ling ii
(1. Key Laboratory of Lubricating Oil, Petro China, Dalian 116031, China
2. Petro China Dalian Lubricating Oil R&D Institute, Dalian 116031, China)
Abstract The butadiene isoprene copolymers( BIRS)were synthesized by n-butyllithium(-buli)tetrahydrofuran(THF)/Cyclohexane
(Cy)initiator system. The hydrogenated butadiene Isoprene copolymers(HBIRS )were obtained by catalytic hydrogenation of the BIRS pro
ceeded by Nickel 2-ethylhexanoate/triethyl aluminum. The molecular weights and molecular weight distributions of the polymers were
characterized by gel permeation chromatoraphy(GP) and the microstructures of the polymers were determined by H-NMR, and the ther-
stabilities were measured by thermo gravimetric analysis(TGA). The HBIRS were dissolved in 150SN base oil, and effects of the micro
structures and the molecular weights on the performance including the thickening abilities, the shear stabilities, and the low temperature start
abilities were inestigated an e ompa ilies w th our point depressant were studied. Several low temperature hydraulic oils with dif-
ferent viscosity grade were formulated using HBIR as viscosity Index improver HBIRS could improve the viscosity index of the oils drasti
cally, but had no effect on pour point
Key words: low temperature hydraulic oil; viscosity index; improver; hydrogenated butadiene isoprene copolymer
鉴于此,中国石油和中国石化先后开发了粘温性能优
液压油是液压系统的血液,不仅作为实现能量传异的低温液压油,该油是以深度精制的矿物油为基础
递、转换和控制的工作介质,同时还起着润滑、防锈、冷油并添加高性能的黏度指数改进剂和降凝剂,具有低
却和减震等作用,液压油质量直接影响系统的灵活性
的倾点、高的黏度指数(大于130)和良好的低温黏度。
准确性和稳定性。随着液压技术的发展,对液压油的选择合适的黏度指数改进剂和降凝剂是调配低温液压
性能要求也越来越严格。许多液压系统的使用环境恶
油的关键。目前,通用的黏度指数改进剂(VI)有聚异
劣,温差较大,对液压油的粘温性能要求较高。普通的丁烯(PB)、烯烃共聚物(OCP)、聚丙烯酸酯(PMA)以
液压油在低温时容易凝固,导致液压系统出现故障;而及氢化苯乙烯二烯烃共聚物(HSD)四大类,而在低温
在低温下不凝固的普通液压油在常温下的黏度又很液压油中应用最广泛的是PMA类,有一部分采用OCP
低,会増大液压元件本身的磨损,造成系统效率低下。类和HSD类。研究表明,HSD类因为具有较高的増稠
能力和剪切稳定性,在调配同等黏度级别的低温液压
收稿日期:2015-10-21
油时,加剂量少,可降低油品使用过程中产生的油泥量
作者简介;张雪涛(1981-),男,辽宁抚顺人,工程师,博士,主要从事于
以及大加剂量带来的生产成本;另外,由于其出色的低
润滑油黏度指数改进剂的开发工作。
温性能以及与降凝剂的良好配伍性,可增加油品调酊
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