Low-density self-extinguishing sealants

ISSN： 1811-2382

Source： Polymer Science Series C, Vol.49, Iss.2, 2007-06, pp. : 179-181

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Abstract

It is shown that, for a maximum decrease in the density of elastomeric materials, it is feasible touse phenol formaldehyde microspheres. The technology of the deposition of fireproofing agents on the surface of phenol microspheres by the vapor-phase treatment is described. The use of this technology allows us to significantly decrease the combustibility of sealants. Results of a study on the effect of the surface treatment of phenol microspheres with phosphorus trichloride and ammonia are reported. It is shown that the use of these fireproofing agents makes it possible not only to decrease the combustibility of elastomeric materials but also to classify them as “self-extinguishing” materials. The effect of the degree of the purification of low-molecular-mass rubber on the basis of poly (dimethyl siloxane) from volatile impurities is also studied. On the basis of the results, a new self-extinguishing sealant with very low density is developed.