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Biodegradable terpolymers and terpolymer blends as pressure-sensitive adhesives

  • US 9,416,221 B2
  • Filed: 08/30/2011
  • Issued: 08/16/2016
  • Est. Priority Date: 08/30/2010
  • Status: Active Grant
First Claim
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1. An article comprising:

  • a conformable backing member comprising a sheet; and

    a pressure-sensitive adhesive (PSA) comprising a poly(D,L-lactide-co-glycolide-co-ε

    -caprolactone) having a molecular weight (Mw) of from 60,000 to 130,000 Daltons and a polydispersity index (PDI) of less than 2.0;

    wherein the poly(D,L-lactide-co-glycolide-co-ε

    -caprolactone) exhibits storage modulus (G′

    ) values of from about 1.5×

    105 Pa to about 5.5×

    105 Pa, over a frequency of from about 0.1 to about 1 Hz; and

    exhibits storage modulus (G′

    ) values of from about 1.0×

    106 Pa to about 4.0×

    106 Pa, over a frequency of from about 102 to about 104 Hz at 30°

    C., and having a surface thereof coated to the conformable backing member;

    wherein the PSA coats 0.1% to 100% of the surface area of the conformable backing member.

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