Lubricant is made by base oil and various additives. The additives are directly related to the use of lubricant performance. Pour point depressant is one of additives which is to improve the flow properties of lubricant at low-temperature. Development of high-performance pour point depressant of lubricant will not only enhance the use of performance, and effectively lowers the pour point of lubricant oil to improve low-temperature fluidity, but also increase oil production. Pour point depressant pla...