Method for making solid materials having a flash point of less than 500. degree. C. fire alarming, fire alarming and self extinguishing, or fire alarming, self-extinguishing and fire abating

摘要

Solid materials having a flash point of less than 500 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 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.