Patent ID: 7722940
Filing Date: 2010-05-25
Classification: B01J,B32B,B65D,C08J,Y10T

Abstract:
1. Stock packaging materials having a substantially dry-to-the-touch, curable, pre-applied adhesive composition on at least one bonding surface thereof wherein said pre-applied adhesive composition comprises an encapsulated liquid curable material and a separately encapsulated curative complex, said curative complex being encased in a polymer capsule and comprising an in-situ formed carrier material and an effective amount of a curative or combination of curatives contained in the carrier material and capable of effecting, directly or indirectly, the cure of the aforementioned liquid curable material, said carrier material being a natural or synthetic material or composition that is substantially non-flowing in the absence of external forces, elevated temperatures or both impacting upon said curative complex wherein the in-situ formed carrier material is formed by the action of a curative with or on a precursor composition for said carrier material and either (i) the curative for the in-situ formed carrier material is different from and in addition to the curative contained in said carrier material or (ii) the curative for the in-situ polymerized carrier material is the same as the curative contained in the carrier and the amount of the curative prior to in-situ polymerization of the carrier material is at least 1.6 weight % based on the weight of the carrier material and the amount of curative remaining after polymerization of the carrier material is effective for effecting cure of the liquid curable material.