Patent ID: 6090860
Filing Date: 2000-07-18
Classification: C08J,C09D,Y02W

Abstract:
A method of physically separating a gas barrier polymer coating from a base thermoplastic polymer in a multilayered structure, comprising the steps of:(A) providing the multilayered structure comprising at least one gas barrier polymer coating and at least one base thermoplastic polymer;(B) contacting the multilayered structure with a mixture comprising (i) a major amount of water, (ii) at least one basic compound, (iii) at least one lifting agent, and (iv) at least one accelerator selected from the group consisting of glycol ethers, glycol ether acetates, alkylene carbonates, glycerine, lactones, hydrocarbyl substituted lactones, pvrrolidones, hydrocarbyl substituted pyrrolidones, furan compounds and mixtures thereof, wherein the pH of the mixture of step (B) is greater than about 7.5; and(C) physically separating the gas barrier polymer coating from the base thermoplastic polymer.