| abstract |
Preparation of polyurethane having an ethylenically unsaturated bond, a method of modifying polyurethane including a process of treating the polyurethane with a liquid containing a compound having a conjugated double bond, or preparing a polyurethane having a conjugated double bond A method for modifying polyurethane including a step of treating the polyurethane and a step of treating the polyurethane with a liquid containing a compound having an ethylenically unsaturated bond is used. |