An epoxy or phenolic functional polyester/polyether oligomer or polymer having a functionality of greater than 2 and comprising moieties derived from diglycidyl ethers or diglycidyl esters, anhydrides and dihydric phenols. The oligomer or polymer is prepared by (1) reacting a liquid epoxy resin (LER), along with a dihydric phenol, with a cyclic anhydride, in the presence of a catalyst, the cyclic anhydride being employed in an amount sufficient to achieve the desired functionality but insufficient to form gels in the anhydride-modified epoxy resin.
一种环氧或
酚醛官能团聚酯/聚醚低聚物或聚合物,其官能团大于 2,包含由
二缩水甘油醚或二
缩水甘油酯、酸酐和二
水酚衍生的分子。这种低聚物或聚合物的制备方法是:(1) 在催化剂存在下,将液态环氧
树脂(LER)和二元
酚一起与环状酸酐反应,环状酸酐的用量足以达到所需的官能度,但不足以在酸酐改性的环氧
树脂中形成凝胶。