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Tackified amorphous-poly-alpha-olefin-bonded structures

  • US 7,270,889 B2
  • Filed: 11/04/2003
  • Issued: 09/18/2007
  • Est. Priority Date: 11/04/2003
  • Status: Active Grant
First Claim
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1. A bonded structure comprising:

  • a first subtrate;

    a second substrate; and

    an adhesive composition bonding the first substrate and the second substrate to one another at an add-on level between about 0.5 and about 25 grams/meter2, wherein the bonded structure has a dynamic peel strength greater than 215 grams per 25 millimeters and has no burn-through visual defects greater than about 1 millimeter, and the adhesive composition comprises;

    about 75 to about 99% by weight amorphous poly-alpha-olefin, about 1 to about 5% by weight tackifier, andzero to about 20% combined weight of one or more additives selected from the group consisting of color pigments, fragrances, fillers, block copolymer compatibilizers, waxes, and oils, the fillers being selected from the group consisting of titanium dioxide, carbon black and calcium carbonate,the amorphous poly-alpha-olefin, tackifier and one or more additives together constituting about 100% by weight of the adhesive composition,the tackifier consisting of a C5 hydrocarbon tackifier and having a molecular weight of about 2000 Daltons or less.

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