| abstract |
The invention relates to a composition that is self-foaming in an acid medium, comprising at least: - a hydrophilic polymer, - a compound capable of cross-linking the hydrophilic polymer by the formation of ionic bonds, - a foaming agent, and - a foam-stabilizing agent, said composition being in the form of a powder consisting of particles having a particle size ranging from 10 nm to 2 mm and in which at least 20% of the particles have a particle size greater than or equal to 100 nm. |