| 摘要 |
<p>The present invention is an improvement in a method for making phenolfunctional polyster polymer wherein a hydroxybenzoic acid a polyol, and a dicarboxylic acid are subjected to a polyedterificantion reaction under polyesterifi cation conditions to make said polymer. The improvement comprises conducting the reaction in two stages, the first stage comprising the formation of an ester-alcoihol adduct between said hydroxybenzoic acid and an epoxy compound wherein the ratio of carboxyl groups from said hydroxyberzoic acid to said oxirane groups of said epoxy compound is about 1:1. The second stage or the improvement comprises conducting the polyesterification reaction with said adduct.</p> |
