RUBBER, CHLORINATED 5-10-20-40-100 An Elastomer ( natural rubber or a polyolefin) to which 65% of chlorine has been added to give a solid film-forming resin.  White amorphous powder available in viscosity grades from 5-125C, centipoises, the figures indicating viscosity of a 20% solution in toluene.  Decomposes at 125C, soluble in aromatics, insoluble in aliphatics and alcohol’s.  Compatible with almost all natural and synthetic resins.  Chief use is in maintenance paints. See also “Parlon,” “Hypalon,” rubber hydrochloride. Hazard:  Do not dry-mill chlorinated rubber with zinc oxide; mixture reacts violently at 216C.  Do not use in baked enamels.