Patent ID: 6689483
Filing Date: 2004-02-10
Classification: B32B,C08J,Y10T

Abstract:
A process for removing unwanted acid or monomeric acrylate from an ethylene/acid copolymer comprising,i) preparing a thermoplastic composition comprising an ethylene/acid copolymer or ionomer thereof or an ethylene/acid/acrylate terpolymer or ionomer thereof or an ethylene/vinyl acetate copolymer wherein the composition contains residual acid, and ii) adding to the composition an acid scavenging agent selected from a hydrophilic molecular sieve which comprises a sodium aluminosilicate containing less than 5 wt. % of magnesium oxide and having a silica/alumina ratio of less than 100 and having a nominal pore diameter of 8-10 Angstroms.