EXTERNAL LUBRICANT COMPOSITIONS FOR RIGID VINYL POLYMERS

摘要

The present invention provides an external lubricant composition for lead stabilized vinyl polymer. The external lubricant functions as both an external lubricant and a processing aid by speeding fusion and thus, obviates the need for a separate processing aid. The external lubricant comprises an effective amount for lubricating vinyl polymer of polyethylene having a Brookfield viscosity at a temperature of 150 DEG C of between about 1 000 and about 100,000 centipoises and an acid number as determined by standardized titration of KOH of between about 1 and about 40.