| abstract |
The invention relates to a liquid formulation for the preparation of a tannin-based thermosetting foam, which contains a mixture of at least one hydrolysable tannin and at least one condensed tannin, lignin, water, a hardener and a surfactant agent. The total quantity of tannins in the formulation is between 8 and 60% by weight, and the quantity of lignin is between 4 and 30% by weight, with respect to the total weight of the formulation. Said formulation makes it possible to prepare a foam, by curing, with advantageous mechanical properties. |