| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for removing polyurethane, in which the polyurethane only is decomposed or dissolved from a polyurethane layer formed on an underlayer not being constituted of polyurethane and the decomposed material of the polyurethane can be separated without being mixed with the underlayer; and the underlayer can be recovered in a high purity state and reutilized. <P>SOLUTION: The method for removing polyurethane includes acting a liquid containing a solvent having a boiling point of ≥150°C and a carbonate salt or phosphate salt of an alkaline metal on the polyurethane layer formed on the underlayer not being constituted of polyurethane to thereby remove the polyurethane layer from the underlayer. <P>COPYRIGHT: (C)2012,JPO&INPIT |
