Properties of Sprayed Polyurethane and Polyisocyanurate Foams Obtained from Vegetable Oil Polyols
Keywords:vegetable oil polyols, polyurethane and polyisocyanurate foams, physical and mechanical properties
A technology of the synthesis of polyols with the hydroxyl value (310 – 320) mg KOH/g from rapeseed and sunflower oils by way of their transamidisation with diethanolamine has been developed. Based on these polyols, compositions for producing polyurethane and polyisocyanurate foams have been formulated. The technology of spraying these compositions both with low-pressure and high-pressure machines has been developed. The comprehensive studies of these foams have shown that, in terms of both mechanical and thermal insulation characteristics, they compare well with commercial PUR foams. The reaction to fire of these foams conforms to the requirements of the E class (EN 13501-1:2002).
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