PRODUCTION OF CHLORINATED POLYETHYLENE RUBBER OF GOOD MOLDABILITY

摘要

PURPOSE:To produce the titled rubber having excellent physical properties, chemical properties, heat-insulating property, etc., and good moldability, by chlorinating powdered polyethylene of a wide MW distribution so that the chlorinated rubber will meet specified requirements. CONSTITUTION:Powdered polyethylene having a MW distribution (Mw/Mn) =20, a melt index (MI) =1g/10min, and a density =0.92 is suspended in water and chlorine gas is blown thereinto at a temperature near the crystalline m.p. to chlorinate the powdered polyethylene till the chlorine content reaches 25-45wt% and the remaining crystal is decreased to 1% or below, thus obtaining a powdered vulcanizable chlorinated polyethylene rubber (average particle size =about 0.5mm.).