FIELD: chemistry.
SUBSTANCE: method of producing a rigid foamed polyisocyanurate involves reaction at isocyanate index from about 175 to about 400 of polyisocyanate with at least one polyol of natural oil containing at least about 35 wt % with respect to the weight of polyl natural oil, having hydroxyl number from about 175 to about 375 and hydroxyl functionality from about 2.0 to about 2.8, in the presence of a foaming agent and optionally in the presence of one or more surfactants, flame-retardants, pigments, catalysts and fillers, in which the obtained foamed plastic has content of materials based on renewable biological material of at least 8 wt %.
EFFECT: foamed plastic obtained using said method has characteristics similar to those of foam plastic obtained from oil-based material.
14 cl, 2 tbl
