Patent ID: 7009009

Claim:
A curable composition comprising: (a) an epoxy resin; (b) a latent fluxing agent which liberates a phenolic compound or a carboxylic acid containing compound when heated above 140° C.; and (c) a compound for effecting cure of the epoxy resin wherein the latent fluxing agent is selected from the group consisting of an α-alkoxyalkyl ester of a carboxyl-containing compound, an α-alkoxyalkyl phenyl ether, and a compound having one or more of the following structures I through VI: wherein X denotes or Y denotes E denotes an organic group derived from a 1-alkenyl ether and is selected from the group consisting of a hydrocarbon, ether, thioether, ester, thioester, carbamate, amide, and a combination thereof; F denotes an organic group fragment derived from a multifunctional 1-cycloalkenyl ether wherein the cyclic ether groups are linked through F, and is selected from the group consisting of a hydrocarbon, ether, thioether, ester, thioester, carbamate, amide, and a combination thereof; R 1 represents a C 1 –C 6 alkyl group; R 2 and R 3 are independently selected from the group consisting of hydrogen, substituted or unsubstituted linear or branched C 1 –C 22 alkyl, aryl, alkaryl, cycloalkyl, alkoxy and phenyl; R 4 is selected from the group consisting of a substituted or unsubstituted linear or branched C 1 –C 22 alkylene, alkenylene, arylene, alkylenearyl, cycloalkylene, alkyleneoxy and phenylene; R 5 and R 6 are independently selected from the group consisting of linear or branched C 1 –C 22 alkylene, alkenylene, arylene, alkylenearyl, cycloalkylene, alkyleneoxy and phenylene; n is an integer of from 2–30, p is an integer of 1 or 2 and q is an integer of from 5–30.