Desmodur® RN is a solution of a polyisocyanurate with aliphatic and aromatic NCO groups in ethyl acetate. It is suitable for crosslinking adhesives based on Desmocoll®, natural or synthetic rubber, especially pale-colored adhesives used to bond rubber materials. . The use of suitable adhesives yields bonds which undergo minimal discoloration on exposure to light. This product has an NCO content of 7.2 ± 0.3%, a non-volatile content of approx. 40%, and a density at 20°C of approx. 1.04g/cm^3.
After adding of Desmodur® RN, the ready-to-use two-component adhesive must be used within its pot life. This is not only governed by the polymer content of the adhesive but also by its other components (resins, antioxidants, plasticisers, solvents, etc.). At the end of the pot life, usually several hours or one working day, the adhesive becomes increasingly difficult to work and its viscosity increases rapidly. Finally, irreversible gelling occurs.
Covestro (formerly Bayer MaterialScience) provides raw materials, such as waterborne adhesives, major high solids coatings, advanced powder coatings, and specialty sealant chemistries. Bayer produces polycarbonates and polycarbonate blends, polyurethanes, and TPU resins, particularly for design and processing parts with TPU resins applications; helping products in a wide variety of applications look better and last longer.
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