Eastman AQ™ 1950 is a semisolid branched sulfopolyester resin with a molecular weight between 20 and 30 kDa. This medium–molecular weight copolymer is commonly used as an ingredient in repulpable hot-melt adhesives. AQ™ 1950 is water dispersible at moderate temperatures without the need for emulsifiers or cosolvents. Additionally, unlike polyvinyl alcohol, polyvinyl pyrrolidone, and other water-soluble polymers, AQ™ polymers will form small anionic aggregates that will remain suspended via electrostatic repulsion without the need for surfactants, dispersants, or other additive content.

Eastman AQ™ 1950 has a Tg of 2.5°C and provides outstanding flexibility and tack when formed into a film. When used in adhesive applications, Eastman AQ™ 1950 resins feature complete repulpability in alkaline conditions. This allows the recycling of paper-based products to be easier, providing benefits to the circular economy of paper packaging. Adhesives used in medical applications can also benefit from Eastman AQ™ 1950, where AQ™ 1950 will resist dissolution in ionic media.