A NEW EVALUATION OF DITHIOPHOSPHATES CONC ERNING ACCELERATORS UNABLE TO FORM N-NITROSAMINES

N-nitrosamine free vulcanization becomes a topic of growing interest w ith increasing demands for working place health care. The introduction of dithiophosphates in rubber chemistry offers an interesting alterna tive to classical accelerators concerning technological, economical an d toxicological aspects; dithio-phosphates are unable to form N-nitros amines, The presented systems give examples for optimized mixtures bas ed mainly on dithiophosphates and exhibit a comparable physical proper ty set to conventional systems. The design of blooming free curing sys tems for EPDM via dithiophosphates proves to be a technological advant age of these systems.