Desmodur® VP LS 2257

Covestro (formerly Bayer MaterialScience) 科思创

Desmodur® VP LS 2257 is a blocked aliphatic polyisocyanate based on HDI. It can be used in combination with OH-functional polyols, preferably Desmophen® T-grade OH-functional polyesters, in the formulation of lightfast, one-component polyurethane baking coatings, especially in coil and can coating applications. This product has a non-volatile content (0.2g / 60min / 80°C) of approx. 70%, a viscosity at 23°C of approx. 2,300 mPa·s, and a color value (Hazen/APHA) of = 100. Desmodur® VP LS 2257 was developed as the hardener for lightfast one-compnent polyurethane coatings whose stoving temperature can be reduced by the addition of a catalyst, e.g. 0.3 - 1.0% dibutyltin dilaurate (DBTL), without adversely affecting the storage stability of the ready-to-use coatings.

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