Polyvinyl alcohol-stabilized polyvinyl esters as dispersion adhesives

Abstract

Polyvinyl alcohol-stabilized polyvinyl esters are provided in the form of aqueous dispersions. Such polyvinyl esters are described for use as dispersion adhesives, particularly in machine application methods such as nozzle or roll application. The polyvinyl esters are stabilized by at least two polyvinyl alcohols, each with a viscosity of 8-30 mPas and differing viscosities and may be prepared by emulsion polymerization. The dispersion adhesives demonstrate excellent shear stability, wet adhesion, and nozzle running properties, while minimizing adhesive fouling and buildup during high-speed machine application. Such dispersion adhesives are especially suitable for bonding paper, cardboard, and cellulosic materials, including applications requiring food contact.

Dependencies are inferred from the claim text.