New energy-absorbing materials obtained by valorisation raw materials from the polyurethane biofoam chemical recycling.

In the described studies, raw material from chemically recycled petrochemical foam and biobased polyurethane foams (100% of rapeseed oil polyol were used in polyol premix) were utilised in order to obtain viscoelastic foams. The recycled foams exhibited differ-ences in chemical structure, resulting in the formation of four different repolyols. The ob-tained repolyols were employed as replacements for 10 to 30% wt. of the petrochemical polyol in the mixture utilised to produce viscoelastic polyurethane foams. It was deter-mined that the chemical structure of the polyol utilised for the foam's initial production influences the properties of the repolyols obtained, and thus also the properties of the vis-coelastic foams obtained using them.