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Bayer MaterialScience develops polyurethane dispersions for textile coatings and synthetic leather
Article Type: New products From: Pigment & Resin Technology, Volume 40, Issue 5
Bayer MaterialScience is introducing two new polyurethane (PU) dispersions from its Impranil® line at the TechTextil 2011 trade fair from May 24 to 26 in Frankfurt, Germany. The new dispersions enable the production of high-quality coated and durable synthetic leather without solvents or toxic substances. Using high-solids formulations (60 percent solids content), a foam coating of adequate thickness can even be applied in a single step, thus increasing machine utilization. Most importantly, however, energy consumption is reduced because less water evaporates during the process. “With our PU dispersions, we give the textile industry new opportunities to conserve resources and improve the efficiency of its processes. We are showing them a path to greater sustainability,” says Rolf Irnich, textile coatings specialist at Bayer MaterialScience.
High-solids PU dispersions such as Impranil® DLU make it possible to apply flexible, hydrolytically stable foam coatings to upholstery coverings, rug backings and softshell clothing. In the production of synthetic leather, the mechanically blown foam method of processing the dispersions offers advantages over the established coagulation process, which uses toxic dimethylformamide. The experts at Bayer MaterialScience have developed two new aliphatic PU dispersions to expand the company’s successful and cosolvent-free portfolio. Coatings formulated with Impranil® LP DSP 1069 lend outerwear and other textile products high rebound resilience without compromising their softness. Furthermore, the coatings are very lightfast and, when combined with additional isocyanate crosslinking, e.g. with Desmodur® N 3900, they are also wash resistant.
The second new dispersion, Impranil® LP GHG 519, is a low-cost specialty for the finish, the topcoating of synthetic leather or a textile coating. Material surfaces formulated with this product feel pleasantly dry to the touch and are characterized by high-scratch resistance.