Biopolyols from oilseed radish oil can replace petrochemical polyols in open cell PU foams, producing materials with comparable properties Different catalysts yield biopolyols with similar characteristics H igh temperatures reduce premix stability, as reflected by increased acid numbers, whereas room or low temperatures have minimal impact Increasing b iopolyol s content in the polyol premix positively affects foam structure, apparent density, and thermal conductivity of PU biofoams highlighting