Composition for manufacturing a tannin-based foam material, foam material obtainable from it, and manufacturing process thereof

A process for manufacturing a product of organic foam material usable as a thermal insulator, said process comprising the steps of:

• providing a mould having a shape which corresponds to that of the product to be obtained,
• providing furfuryl alcohol and a blowing agent having a boiling point in the range between 30° C. and 100° C., and mixing together such components,
• providing a flavonoid tannin powder, comprising a prorobineditinidin tannin and/or a profisetinidin tannin, and incorporating the flavonoid tannin powder in the mixture of the furfuryl alcohol and the blowing agent, and mixing the mixture so obtained,
• adding an acid-based catalyst to the mixture obtained, and mixing,
• pouring the mixture thus obtained into the mould, and allowing the components react until the composition is completely foamed in the mould.