Process for preparing solid materials which have a flash point less than 500C for fire alarm, in particular fire alarm and self extincao, and in particular alarm of fire, self extincao,And in particular alarm of fire, self extincao and slaughter of fire, as well as article configured

摘要

Solid materials having a flash point of less than 500 DEG C. are rendered fire alarming by providing for the presence thereon of micro capsules containing a bromofluoroalkane having a critical temperature of at least 100 DEG C., the micro capsules having an external diameter of from 200 to 260 microns, and the wall of the capsules consisting of a polymer, treated to release the bromofluoralkane suddenly at a predetermined temperature to provide a detonation having a maximum sound level of 10-12 kHz.