Patent ID: 9605117
Date: 2017-03-28
CPC Classifications: B32B,C08G,C08J,C09J

Claim:
1. A method of bonding a metal foil to a polymeric film comprising the steps of (A) applying a layer of a waterborne adhesive composition to a surface of said metal foil, (B) drying said layer of said adhesive composition to produce a layer of dried adhesive, and (C) after said drying, bringing a surface of a polymeric film into contact with said layer of said dried adhesive composition, wherein said waterborne adhesive composition comprises (i) an aqueous medium (ii) one or more isocyanate compounds dispersed in said aqueous medium, wherein said one or more isocyanate compounds comprise one or more hydrophilically modified isocyanate trimers that have the structure wherein the three R groups are the same as each other, wherein the three R groups are aliphatic, and wherein G is an organic group that contains a hydrophilic group selected from the group consisting of hydrophilic alkylene oxide groups, anionic sulfate groups, and anionic carboxylate groups, and (iii) one or more functional silane compounds dispersed in said aqueous medium.