Universite Dé Lorraine

Silvachimica S.r.l.

Silvateam S.p.a.

Samuele Giovando

Antonio Pizzi

Vanessa Fierro

Alain Celzard

Maria Cecilia Basso

Eric Poles

Lorenzo Tribuzio

Maria Cécilia Basso

A process for tanning leathers including a pre-tanning step and a tanning step is provided. In the pre-tanning step leathers are treated with a cationic active agent including a quaternized ester of a fatty acid and triethanolamine, or mixtures thereof and, subsequently, with an anionic active agent including tannins vegetable extracts and a natural or synthetic dispersant selected from the group consisting of lignosulfonates, distillation stillages, sulfonated disulfonic polymers, sulfonated naphthalene polymers or mixtures thereof, to obtain leathers with a shrinkage temperature of at least 65° C. The pre-tanning and tanning steps do not include treatment with aldehydes or aldehyde donor compounds and/or with metal salts.

Process for tanning leathers, pre-tanning products and use thereof

A composition for manufacturing a foam material based on flavonoid tannins, includes a flavonoid tannin powder mainly of the prorobineditinidin and/or the profisetinidin type, according to an amount in weight in the range between 40% and 45% of the composition, furfuryl alcohol, a blowing agent, and a catalyst. The composition is totally formaldehyde-free, and contains an amount of furfuryl alcohol greater than 20% in weight of the composition. The composition makes possible to obtain foam materials of high characteristics and low cost, that can typically be used in the fields of building and in the automotive industry and in the vehicles in general.

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

Growing community of inventors

Monforte d'Alba, Italy

Samuele Giovando