Desmodur® PL 340 BA/SN

Covestro (formerly Bayer MaterialScience) 科思创

Desmodur® PL 340 BA/SN is a blocked aliphatic polyisocyanate based on IPDI, and used in combination with polyol components for the formulation of lightfast one-component polyurethane stoving coatings. This product has a non-volatile content (0.2g/60 min./125°C) 60 ± 2%, a viscosity at 23°C 600 ± 50 mPa·s, an equivalent weight of approx. 575, and a blocked NCO content of approx. 7.3%. Desmodur® PL 340 BA/SN can be combined with suitable, preferably flexible, Desmophen® grades to formulate one-component polyurethane stoving coatings which are lightfast and resistant to weathering and chemicals and highly resistant to thermal yellowing. These coatings are used for original automotive topcoats. Compared with polyisocyanates blocked with butanone oxime, Desmodur® PL 340 allows a reduction in stoving temperature of approx. 10 °C, with no decrease in solvent and chemical resistance.

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