| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a high molecular weight polyfunctional polyester resin having a high hydroxyl value and a process for producing the same. <P>SOLUTION: A carboxyl group-containing high molecular weight polyester resin is produced without causing three-dimensional resin, by performing polycondensation reaction of a diol compound and a dicarboxylic acid compound followed by ring-opening addition of a compound having two or more acid anhydride groups in the molecule. The resultant polyester resin is subjected to ring-opening addition of an epoxy compound and/or an oxetane compound to obtain a high molecular weight polyfunctional polyester resin having a high hydroxyl value. Paints and coat films formed using the polyester resin is excellent in physical properties, corrosion resistance and weather resistance. <P>COPYRIGHT: (C)2011,JPO&INPIT |
