Patent ID: 8182920
Filing Date: 2012-05-22
Classification: C08J,C08K,C08L,C09D,D21H,Y10T

Abstract:
1. A nanocomposite barrier coating on a substrate which is prepared by forming a film from a concentrated dispersion, said dispersion comprising: a) a liquid carrier medium which includes primarily water; b) an exfoliated montmorillonite filler material dispersed in the carrier medium; and c) a matrix polyester polymer which is dispersed in the carrier medium, wherein the concentrated dispersion is prepared by dispersing the filler material and the polymer matrix in the liquid carrier medium, and increasing the weight percent solids content of the initial dispersion by at least 5% thereof by selectively removing a portion of the liquid carrier medium prior to application on the substrate, wherein the coating exhibits an oxygen permeability that is at least 10 percent lower than a like coating that is prepared with a like dispersion which is not concentrated by selectively removing a portion of the liquid carrier medium.