electrically conductive , pressure sensitive adhesive composite formulations comprising adhesive polymers , electrically conductive quaternary ammonium polymers , electrically conductive water soluble and water swellable polymeric fillers for imparting cohesiveness to said composite , and additionally , chemical agents that retard oxidative or microbial degradation of the composite . the composite formulations yield a flexible and extensible material that is suitable as an adhesive for biological electrodes , particularly transcutaneous electrical nerve stimulation electrodes .