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
OwnerAnthonius H. Pieterseninventor
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Abstract
Solid materials having a flash point of less than 500.degree. 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.degree. 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.
Claims22
In a method of making solid materials having a flash point of less than 500.degree. C. fire alarming, or fire alarming and self extinguishing, or fire alarming, self extinguishing and fire abating, the improvement comprising applying to said solid material at least one surface layer containing micro capsules of a bromofluoroalkane, the micro capsules having an external diameter of from 200 to 260 micrometers, and further having walls consisting of a polymer having pores therein, the pores having been sealed by means of a hydrophobic polycondensation product of an aromatic polyhydroxy compound and an aldehyde, and the bromofluoroalkane within the micro capsules being liquid at ambient temperature and having a critical temperature of at least 100.degree. C.
Micro capsules of bromofluoroalkane having an external diameter of from 200 to 260 micrometers, the walls thereof consisting of a polymer and having pores therein, the pores having been sealed by means of a hydrophobic polycondensation product of an aromatic polyhydroxy compound and an aldehyde, and the bromofluoroalkane being liquid at ambient temperature and having a critical temperature of at least 100.degree. C.
Dependencies are inferred from the claim text.