Patent ID: 7786205

Claim:
A non-pressure sensitive adhesive foamable composition comprising: from about 50 to 80 percent by weight of at least one copolymer wherein the copolymer is selected from the group consisting of ethylene methyl acrylate, ethylene butyl acrylate, ethylene ethyl acrylate, ethylene methacrylic acid, and mixtures thereof; from about 1 to 10 percent by weight of a microencapsulated blowing agent; from about 0 to 30 percent by weight of at least one tackifier; from about 0.5 to 5 percent by weight of at least one peroxide; from about 0 to 5 percent by weight of at least one chemical blowing agent; from about 1 to 10 percent by weight of a blowing agent activator; from about 0.25 to 5 percent by weight of at least one antioxidant; from about 0.5 to 5 percent by weight of at least one radiation crosslinking promoter; and from 2.5 to 30 percent by weight of at least one filler comprising ferromagnetic particles.