Abstract: The present invention relates to a composition for controlling harmful arthropods, comprising at least one repellent agent and, as an insecticide, hydrophobic silica particles, characterized in that it further comprises at least a stabilizing agent of the repellent agent. According to the composition of the invention, it is permitted to protect a repellent agent from degradation in the presence of hydrophobic silica particles.

Abstract: The present invention concerns an aqueous binder for a fiber mat, in particular mineral fibers, which comprises, in parts by weight: 50 to 95 parts of at least one lignosulfonic acid salt; 5 to 50 parts of at least one thermosetting resin selected from phenolic resins and urea-formaldehyde resins; and 5 to 20 parts of a curing catalyst selected from compounds containing phosphorus and sulfates per 100 parts of lignosulfonic acid salt and of thermosetting resin. It also concerns the products resulting from treatment of the fibers, especially mineral fibers, with said binder.