Method for modifying polyurethane, method for modifying polyurethane, polishing pad and polishing pad

摘要

A method of preparing a polyurethane comprising an ethylenically unsaturated bond and a process of preparing a polyurethane comprising a compound containing a conjugated double bond, or a method of preparing a polyurethane having a conjugated double bond, and polyurethane A method of reforming a polyurethane containing a process containing a compound having an ethylenically unsaturated bond, and a method of reforming the polyurethane is used.