| 摘要 |
<p>The present invention refers to polyurethane integral rigid foams having better tearing propagation-strength, breaking elongation-strength, and traction-strength, which are produced by reacting a) organic and/or inorganic polyisocyanates modified with b) at least a relatively high molecular compound containing at least two reactive hydrogen atoms and, if desired, c) chain extensors and/or low molecular weight crosslinkers in presence of d) catalysts, e) if desired, blowing agents, f) and, if desired, another auxiliaries and/or additives, wherein component b) which is utilized consists of at least a recycled polyol, which is obtained by rigid polyurethane integral foams glucolysis, utilizing glycidyl ethers. Polyurethane integral rigid foams produced by this process are utilized as beer barrel coating.</p> |
