| 摘要 |
PURPOSE:To provide a process for the pulverization of an polyolefin capable of easily producing polyolefin fine particles having an average particle diameter of 5mum. CONSTITUTION:(A) A polyolefin having a number-average molecular weight of >=500 is dissolved in (B) a solvent at <=60 deg.C and the obtained solution is dropped into (C) a solvent maintained at a temperature (>=40 deg.C and <80 deg.C) below the precipitation initiation temperature of the polyolefin A in the solvent B solution under stirring and the precipitated polyolefin is pulverized. |
