This invention relates to flexible epoxy resins characterized by a low ionic contamination, total chlorine content less than 0.1%. The epoxy resins are liquids at room temperatur, have Tg values when cured of less than or equal to 150°C, have neat resin viscosities of 25,000 cps or less at 25°C, and have a structural composition comprising an oligomeric backbone of alkylene or alkyleneoxy repeat units, terminated with an aromatic moiety bearing one or more epoxy functionalities:
in which:
the flexible chain is CH2CH2CH2CH2O when r is an integer 1-10; or
the flexible chain is CH2CH20 when r is an integer 3-10; or
the flexible chain is CH2 when r is an integer 10-20; or
; or
in which:
the flexible chain is CH2CH2CH2CH2O when q is an integer 1-6; or
the flexible chain is CH2CH20 when q is an integer 3-10.
本发明涉及柔性环氧
树脂,其特点是离子污染少,总
氯含量小于 0.1%。环氧
树脂在室温下为液体,固化时的 Tg 值小于或等于 150°C,25°C 时的纯
树脂粘度小于或等于 25,000cps,其结构组成包括由亚烷基或亚烷氧基重复单元组成的低聚物骨架,以带有一个或多个环氧官能团的芳香族基团为端基:
其中
当 r 为 1-10 整数时,柔性链为 O;或
当 r 为 3-10 个整数时,柔性链为 0;或
当 r 为 10-20 个整数时,柔性链为
CH2;或
或
其中
当 q 为 1-6 个整数时,柔性链为 O;或
当 q 为 3-10 个整数时,柔性链为 0。