Non-blocking oxygen-resistant vinylidene chloride polymer coating compositions

Abstract

heat-sealable vinylidene chloride polymer coatings having improved anti-blocking tendencies while retaining resistance to oxygen transmission are obtained from aqueous dispersions of a normally crystalline vinylidene chloride polymer wherein such dispersions have incorporated therein from about 0.5 to about 5 percent based on the weight of normally crystalline vinylidene chloride polymer of a plurality of polymeric microspheres having an average diameter of between about 1 to about 5 microns, such microspheres consisting essentially of a vinylidene chloride polymer containing at least about 50 percent by weight of polymerized vinylidene chloride with any remainder of such polymer being one or more monoethylenically unsaturated comonomer.

Description