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AQ™ 1950 Polymer
AQ™ 1950 is a low-Tg, water-dispersible sulfopolyester polymer commonly used as a resin in repulpable hot-melt adhesives.
Eastman AQ™ 1950 is a semisolid branched sulfopolyester resin with a molecular weight between 20 and 30 kDa, commonly used as an ingredient in repulpable hot-melt adhesive formulations. AQ™ 1950 is easily dispersed in water at moderate temperature without the aid of emulsifiers or cosolvents. Unlike polyvinyl alcohol, polyvinyl pyrrolidone, and other water-soluble polymers, AQ™ polymers spontaneously form small anionic aggregates when added to water that remain suspended via electrostatic repulsion without the need for surfactants, dispersants, or other additives.
It has a Tg of 3°C and provides outstanding flexibility and tack when formed into a film. As AQ™ 1950 remains readily dispersible in water, hot-melt adhesives made with this polymer facilitate easier repulpability.
Specifications
Odor: Fruity Viscosity at 177°C, cPs: 75,000–135,000 Ring and ball softening point, °C: 115 Glass transition temperature (Tg), °C: 2.5 ± 7.5 Hydroxyl number, mg KOH/g: 57 Form: Solid Color, max (ASTM D 1544): 4
Primary Chemistry: Sulfopolyester
Features & Benefits
Easily dispersible in water Excellent adhesion to a variety of substrates, including polyolefins, paper, and PET Redispersible in both neutral and alkaline aqueous solutions Facilitates easier repulpability
Problems Solved
Adhesion failure to difficult, flexible substrates Difficulty recycling paper products constructed with adhesives
Applications
Carton and paperboard hot-melt adhesives Printing inks
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