AN IMPROVED PROCESS FOR PRODUCING POLYAMINESULFONES WHICH COMPRISES IRRADIATING AN EQUIMOLAR OR SUBSTANTIALLY EQUIMOLAR MIXTURE OF A DIALLYLAMINE DERIVATIVE AND SULFUR DIOXIDE WITH A LIGHT CONTAINING RAYS HAVING A WAVE LENGTH OF 300 TO 450 MU TO BULK-PHOTOCOPOLYMERIZE THE MIXTURE. ACCORDING TO THIS PROCESS, POLYAMINESULFONES CAN EASILY BE OBTAINED IN HIGH YIELDS. SINCE THE ABOVE-MENTIONED MIXTURE IS A HEAT-STABLE, VISCOUS LIQUID, IT CAN BE CONTINUOUSLY EXTRUDED THROUGH A SLIT OR NOZZLE IN THE FORM OF A FILM OR SHEET ANC CAN BE CONTINUOUSLY POLYMERIZED BY CONTINUOUS APPLICATION OF THE ABOVE-MENTIONED LIGHT. AS THE SAID LIGHT, THERE MAY USUALLY BE USED SUNLIGHT OR THE LIGHT FROM A FLUORESCENT LAMP. THE IRRADIATION OF LIGHT IS EFFECTED AT A TEMPERATURE RANGING FROM -100*C. TO 100*C., PREFERABLY FROM - 50*C. TO 50*C.