摘要 |
<p>The invention concerns the method of recycling waste polyurethane foams to a polyol mixture characterized in that the waste polyurethane is decomposed by the reaction with a low- molecular-weight polyhydric alcohol selected from the group consisting of ethylene glycol, propylene glycol, butanediol, pentanediol, hexanediol, 2-methylpropane-l,3-diol, diethylene glycol, dipropylene glycol, triethylene glycol, tripropylene glycol, trimethylolpropane (2,2- bis(hydroxymethyl)propan-l-ol), glycerol or their mixtures under the condition that the waste polyurethane and polyhydric alcohol are used in the weight ratio at least 3:1 and at most 1:3 and the reaction mixture is subjected to the action of electromagnetic radiation of a frequency ranging from 1 MHz to 10 GHz at the temperature from 50 °C - 300 °C.</p> |
申请人 |
INSTITUTE OF MACROMOLECULAR CHEMISTRY AS CR V.V.L.;INSTITUTE OF CHEMICAL PROCESS FUNDAMENTALS AS CR,V.V.I. |
发明人 |
KRULIS, ZDENEK;HORAK, ZDENEK;BENES, HYNEK;HAJEK, MILAN |