| 摘要 |
<p>PURPOSE:To provide a method for liquefying a vulcanized rubber at a very high reaction rate and in a very high oil yield. CONSTITUTION:A sulfur- or peroxide-vulcanized rubber is liquefied by adding water, pref. an aq. alkali (NaOH) soln., to the rubber and decomposing it in a supercritical zone. The method is based on the fact that both the reaction wherein ion participates, characteristic of a soln. reaction, and the reaction wherein radical participates, mainly occurring in a vapor phase reaction, can be conducted in a homogeneous system at a very high reaction rate in a supercritical zone (at a temp. equal to or higher than the critical temp.).</p> |
