A rye slop (92.2% of H_2O and 7.8% of dry mass),a by-product iin the processof making high wines,were added as a filler(5-30% by weight in relation to total weight of plyisocyanurate and oligomerol) to PUR-PIR foam composition(Table 3).Apparent density,compressive strength,friability,oxygen index,combustion residue,dimensionalstability at 120degC,softening point and TGA thermograms were determined for the seven foams prepared (Figs,1-5).Foams characterized by reduced by reduced brittleness,slithtly reduced oxygen index,retention and softening temperature an dslightly increased compressive strength in relation to the standard foam(with no rye slop added) were obtained when rye slops were addedin amounts from 5% to 30% by weight.IR spectra confirmed the presence of bands characteristic for isocyanurate and urethane groups.
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