INVESTIGATION OF THE FOAMING PROPERTIES OF ALKYL BENZENE SULFONATES AND a-OLEFIN SULFONATES IN THE DEVELOPMENT OF FORMULATIONS OF FOAMING AGENTS OF TYPE S FOR FIRE EXTINGUISHING

Представлены результаты исследований коллоидно-химических, пенообразующих свойств алкилбензолсульфонатов и a-олефинсульфонатов, используемых при разработке рецептур пенообразователей типа S для тушения пожаров. На основе данных, полученных в процессе экспериментов, сделаны выводы о том, что для получения устойчивых огнетушащих пен целесообразно использовать фракции анионных ПАВ, содержащих гомологи с оптимальной длиной углеводородного радикала. The article presents the results of development of foaming agents of type S using alkyl benzene sulfonates and a-olefin sulfonates. On the basis of unified methods of estimation of colloid-chemical and foaming properties, there have been carried out studies in homologous series of the most promising biodegradable surfactants: olefinsulfonates (AOS) obtained by sulfination of individual a-olefins with the number of carbon atoms from 6 to 18, alkyl benzene sulfonates (ABS) obtained by sulfination of benzene alkylated with individual a-olefins. It has been determined that it is most appropriate to use fractions of anionic surfactants containing homologues with the optimal length of hydrocarbon radicals to produce resistant fire-fighting foams. For a-olefin sulfonate – homologues from C11 to C14; for alkyl benzene sulfonate – homologs from C7 to C10. According to foaming ability on «hard» water homologs of optimal fractions are arranged in sequence: a-olefin sulfonate > alkyl benzene sulfonates.