Polyurethane resin for printing processes
Tuesday, 2 June 2009
A new TDI- and tin-free non-migratory polyurethane resin is suitable for both flexographic and gravure printing processes.
The new "eat on-the-go" culture of consumers creates a new and steadily growing demand for flexible packaging applications with excellent performance properties as well as environmental soundness. Current retort ink resin technologies have fallen short in the area of performance such as compatibility with standard ink resins, alcohol solubility to allow for flexographic printing, and pigment dispersion capability. "Versamid PUR 2011", a stand alone ink binder is the latest addition to the "Versamid" PUR range of resins from Cognis, that overcomes these disadvantages experienced with current retort technologies and is compatible with a variety of co-resins to help further optimize performance properties. The new product is a TDI- and tin-free, non-migratory polyurethane resin based on new aliphatic urethane technology. It exhibits good pigment dispersion properties, heat resistance, hydrolysis stability and bond strength. In addition, it exhibits a wide range of solubility in alcohols and acetates which makes it suitable for both flexographic and gravure printing processes.