positively charged polytetrafluoroethylene dispersions prepared in accordance with this invention 10 g of a 10 by weight aqueous solution of dimethylbenzyllaurylammonium chloride were stirred in a beaker by means of a magnetic stirrer 74 ml of a 30 dispersion of negatively charged polytetraflurooethylene containing 0 76 sodium perfluorooctanoate by weight of polytetrafluoroethylene were progressively introduced into the beaker under continuous stirring the polytetrafluoroethylene particles were ellipsoids having major and minor axes of rotation measuring 0 3 and 0 15 microns respectively in this manner a homogenous dispersion of positively charged particles was obtained having a concentration of 27 ptfe and 1 4 cationic emulsifier 9 g of a 5 by weight aqueous solution of trimethylcetylammonium chloride were stirred in a beaker by means of a magnetic stirrer 100 grams of a 15 dispersion of negatively charged polytetrafluoroethylene prepared using 0 32 sodium perfluorooctanoate by weight as the perfluorinated anionic emulsifier were progressively introduced into the beaker under continuous stirring in this manner a homogenous dispersion of positively charged particles having a concentration of 13 7 polytetrafluoroethylene and 0 41 cationic emulsifier was obtained this example demonstrates the influence of the cationic emulsifier employed in the preparation of the positively charged polytetrafluoroethylene dispersion a 39 8 dispersion of polytetrafluoroethylene containing 0 45 ammonium perfluorooctanoate.