Method for producing a product reinforced by a reinforcing element

A process for the manufacture of a reinforced product comprising a matrix based on a composition and at least one reinforcing element, the at least one reinforcing element being embedded in the matrix, the process comprising the steps:

• making the composition comprising at least one compound A1, exhibiting a melting point T1, and at least one compound A2, exhibiting a melting point T2, by mixing the at least one compound A1 and the at least one compound A2 at a temperature Tm such that T1≤Tm<T2, so as to dissolve the at least one compound A2 in the at least one compound A1 and to obtain the composition in a liquid state, the composition being free of organic solvent and water;
• submerging the at least one reinforcing element in the composition in the liquid state;
• a first crosslinking step in which the at least one compound A1 is reacted with the at least one compound A2 to form a resin by heating from a temperature Tm, crosslinking the resin based on the at least one compound A1 and on the at least one compound A2 by heating the composition to at least a temperature Tn such that T1≤Tm<Tn, so as to form the matrix in which the at least one reinforcing element is embedded;
• and
• a second crosslinking step in which the resin is heated to a temperature Tp with Tn<Tp.