Patent ID: 7820740

Claim:
A flame retardant adhesive composition comprising: (A) a halogen-free epoxy resin, (B) a carboxyl group-containing acrylic resin and/or a carboxyl group-containing acrylonitrile-butadiene rubber, (C) a curing agent, (E) a phosphinate represented by a general formula (1) shown below and/or a diphosphinate represented by a general formula (2) shown below: (wherein, R 1 and R 2 are either the same or different, and each represent a monovalent linear or branched alkyl group of 1 to 6 carbon atoms or an aryl group, M represents a metal selected from the group consisting of Mg, Ca, Al, Sb, Sn, Ge, Ti, Zn, Fe, Zr, Ce, Bi, Sr, Mn, Li, Na and K, or a protonated nitrogen base, and m represents an integer from 1 to 4), (wherein, R 1 , R 2 , M and m are as defined above, R 3 represents a bivalent linear or branched alkylene group of 1 to 10 carbon atoms, an arylene group of 6 to 10 carbon atoms, an alkylarylene group of 6 to 10 carbon atoms, or an arylalkylene group of 6 to 10 carbon atoms, n represents an integer from 1 to 4, and x represents an integer from 1 to 4, provided that 2n=mx), and (F) an ion scavenger and/or a heavy metal deactivator.