| 摘要 |
PURPOSE:To obtain the titled resin particles excellent in processability, by dispersing volatile plasticizer-containing polyolefin particles and a dispersant having a fusion-preventing effect in a dispersing medium, and heating the dispersion to a temperature of as high as about the m.p. of the resin particles. CONSTITUTION:The following components are mixed together, for example, in an autoclave: (A) 100pts.wt. polyolefin resin particle such as polypropylene or polyethylene particle, (B) about 5-50pts.wt. volatile plasticizer (e.g., dichlorodifluoromethane), (C) about 0.05-5pts.wt. dispersant having an effect of preventing the resin particles (component A) from being fused (e.g., fine aluminum oxide powder, or calcium stearate), and (D) above about 100pts.wt. dispersing medium (e.g., water or ethylene glycol). The purpose spherical polyolefin resin particles are obtained by heating the dispersion with stirring to a temperature in the range of from by 5 deg.C below the m.p. of the resin to by 5 deg.C above the m.p. of the resin. |
