Abstract: An electropyrotechnic initiator comprising a pyrotechnic varnish in contact with a resistive heating element is prepared by preparing an aqueous adhesive composed of a dispersion of an explosive substance and of additives in an aqueous suspension based on a copolymer chosen from ethylene/vinyl acetate copolymers and vinyl acetate/ethylene acetate/ethylene copolymers, depositing the aqueous adhesive on the resistive element, and drying the aqueous adhesive at a temperature of between 55° C. and 75° C., in order to remove the water contained in the adhesive and to obtain the varnish.

Abstract: The present invention relates to a process for the preparation of an electropyrotechnic initiator (1) comprising a pyrotechnic varnish (6) initiated by a resistive heating element (11). The pyrotechnic varnish is obtained by deposition, on the resistive element, of an aqueous adhesive composed of a dispersion of an explosive substance and of additives in an aqueous suspension based on a copolymer and then by drying the said aqueous adhesive at a temperature of between 55° C. and 75° C. The copolymer is chosen from ethylene/vinyl acetate copolymers and vinyl acetate/ethylene acetate/ethylene copolymers.