Patent ID: 7902305

Claim:
A cationically curable barrier composition consisting essentially of (a) an oxetane compound; (b) a cationic initiator, (c) one or more fillers, and (d) one or more adhesion promoters, or one or more epoxy resins; wherein said oxetane compound has the structure: in which R 7 , R 8 , R 9 , R 10 , and R 11 are independently selected from the group consisting of hydrogen, alkyl, haloalkyl, alkoxy, aryloxy, aryl, alkyloyl and aryloyl groups; n is 0, 1, 2, 3, or 4; Z is a cationically reactive functionality selected from the group consisting of in which R 12 is independently selected from the group consisting of hydrogen, alkyl, haloalkyl, alkoxy, aryloxy, aryl, alkyloyl and aryloyl groups; and R 13 is a linking group selected from the group consisting of alkyl, haloalkyl, aryl, ether, thio-ether, ester, thio-ester, silane, carbonate, and ketone.