The present invention discloses reworkable epoxy compositions suitable for encapsulation of and underfill for electronic components comprising (a) a curable epoxy component which is the reaction product of an epoxidized 1-alkenyl ether or 1-cycloalkenyl ether and a polycarboxylic acid, the reaction product being substantially free of unreacted acid or acid impurities; and (b) a curing agent for the epoxy component, wherein the reaction products of the epoxy composition are reworkable. The cured epoxy compositions of this invention contain thermally labile weak &agr;-alkoxy ester linkages which provide for the reworkable aspect of the invention.
本发明揭示了适用于电子元件封装和下填的可重复加工环氧组合物,包括(a)可固化的环氧组分,其是环氧化的1-烯基醚或1-环烯基醚和多
羧酸的反应产物,反应产物基本上不含未反应的酸或酸杂质;以及(b)用于环氧组分的固化剂,其中环氧组合物的反应产物是可重复加工的。本发明的固化环氧组合物包含热不稳定的弱α-烷氧酯键,这提供了本发明可重复加工的方面。