| 摘要 |
PROBLEM TO BE SOLVED: To provide an imidazole blocked polyurethane resin having improved flexibility, and a coating for a precoated automobile steel plate containing the resin. SOLUTION: This imidazole blocked polyurethane resin is produced using a method which includes: adding an isocyanate compound to a polyester resin to cause an addition reaction; and during the addition reaction, adding an imidazole compound thereto to block a part of the isocyanate compound. COPYRIGHT: (C)2012,JPO&INPIT |
