OLIGOMERS TERMINATED BY PERFLUOROALKYL CONTAINING MERCAPTO GROUPS, PROCESS FOR THEIR MANUFACTURE AND THEIR USE AS SURFACE TENSION DEPRESSANTS AND ADDITIVES IN FIRE FIGHTING COMPOSITIONS

摘要

Abstract of the DisclosureThe present invention relates to novel oligomers of theformula H, and mixtures thereof,wherein Rf is a perflouroalkyl group, E is a linkage group, repre-sents a hydrophilic monomer unit, represents a hydrophobic monomerunit, x and y represent the number of monomer units present in the noveloligomers. The sum of x and y is between 4 and 500 and is between1 and 0.5. The novel oligomers are useful as additives in protein foamtype fire fighting compositions improving foam expansion, foam drainageand extinguishing times and reducing flammability of hydrocarbon contam-inated protein foams. The novel oligomers are further useful as surfacetension depressants providing improved wetting, spreading and levelingproperties in aqueous systems.