Patent ID: 7279234
Filing Date: 2007-10-09
Classification: C08L,C09K,G09F,Y10T

Abstract:
1. A monolayer or multilayer sheet or film for use as a marker, label, taggant or packaging film comprising at least one layer of a transparent, luminescent polymer composition wherein the composition comprises (1) at least one E/X/Y copolymer or copolymer of alkyl (meth)acrylate and (meth)acrylic acid and (2) one or more organic acids or salts thereof; E is ethylene, X is a C The (meth)acrylate is acrylate or methacrylate and the (meth)acrylic acid is acrylic acid or methacrylic acid; and the combined carboxylic acid functionalities in the composition are at least partially neutralized by a rare earth cation selected from europium or terbium and optionally one or more additional rare earth cations.