Patent ID: 6309757
Filing Date: 2001-10-30
Classification: C08G,C08J,Y10T

Abstract:
A gas barrier coating composition comprising:(A) a polyamine component comprising at least one polyamine;(B) a polyepoxide component comprising a polyepoxide having at least two glycidyl groups linked to an aromatic member; and(C) a hydroxy-substituted aromatic compound represented by the following structure (I):HO--A--R.sup.1 R.sup.2 (I)wherein A is arylene; R.sup.1 and R.sup.2 are each independently H, OH, R.sup.3, O(OC)R'.sup.3, NH(CO)R'.sup.3, NH.sub.2, CH.sub.2 R.sup.4, C(CH.sub.3).sub.2 R.sup.4 or (CO)R.sup.5,where R.sup.3 is alkyl; R'.sup.3 is H or alkyl; R.sup.4 is a hydroxy-substituted aromatic group or an amino group; and R.sup.5 is a (di)hydroxy substituted aromatic group, provided that when R.sup.1 is H or R.sup.3, R.sup.2 is not H or R.sup.3, andwherein the hydroxy-substituted aromatic compound (C) is present in the gas barrier coating composition in an effective amount sufficient to provide a gas barrier coating having an oxygen permeability (P(O.sub.2)) less than or equal to 75 percent of the oxygen permeability (P(O.sub.2)) of a gas barrier coating provided by the same gas barrier coating composition which is free of hydroxy-substituted aromatic compounds.