| 摘要 |
<p>The process comprises reaction of an organic polyiso cyanate, an organic polyol, an expanding agent and a catalyst for reaction of the hydroxyl gps. with the isocyanate gps. A further catalyst promotes formation of an isocyanurate ring. At least one part of the polyol component incorporates a prod. of digestion of alkylene polyterephthalate residues dissolved in one or more organic polyols. The foams can also contain surfactants and fire retardant.</p> |
