Desmodur? (DESMODUR?) 44C Product Overview Desmodur (DESMODUR) 44C is 4,4'-diisocyanate monomer having a molecular weight of 250, at room temperature is a colorless to pale yellow solid. The products are mainly used in the production of polyurethane products. Sampling the sampling process to prevent contact with the product and moisture. Specifications Item Index Unit Test Method 2,4'-MDI content of ≤1.8% 2011-0367601-92 hydrolysis chloride content ≤50 ppm 2011-0339304-95 dimer * ≤0.1% 2012-0346901-92 * only applies to When transporting the liquid product Typical properties Item Index Unit Test Method Purity (molecular weight 250) ≥99.5% 2011-0248603-94 NCO content (theoretical) 33.6% - phenyl isocyanate content of ≤10 ppm 2011-0339304-95 viscosity (40 ℃) 4.1 mPa.s 2011-0313703-95 density (40 ℃) 1.19 g / cm3 DIN 51757 specific heat (cp) to about 1.39 kJ /kg.K heat of fusion of about 102 J / g packaging Desmodur (DESMODUR) 44C There are two kinds of delivery: - liquid (tankers) - Solid State (drums, net weight 225 kg) Storage Recommended storage temperature (℃) <5 (solid state), 43 ± 2 (liquid) ≤3 months shelf life (solid) , ≤3 weeks in the tank (liquid) as stored in a closed, turn on the water and all of the state of operation of the proposed isocyanates like Desmodur (DESMODUR) 44C is very sensitive to water, reacts with water to produce insoluble urea and carbon dioxide . In a closed container, carbon dioxide will lead to increased container pressure and dangerous. Desmodur? (DESMODUR) 44C exposed to air, especially in the sun, it will accelerate its yellowing. Thus recommendation stored under dry nitrogen liquid Desmodur (DESMODUR) 44C. Yellowing generally will not affect the product's workability. Desmodur? (DESMODUR) 44C heat sensitive, will form a dimer. Solid State Desmodur? (DESMODUR) 44C at room temperature than the liquid prone to dimerization reaction at 45 ℃. Therefore, solid product should be stored below 5 ℃, before use gradually melt quickly. Although the product dimerization reaction rate decreases with temperature and reduced, but even below 5 ℃, the stability is still limited. Solid State Desmodur? (DESMODUR) 44C are heated to ≥70 ℃ melting, this process will increase the formation of insoluble dimer, also due to the increase in temperature and pressure increases may cause barrel distortion. Security need technical information on security, please refer to the relevant Material Safety Data Sheet (MSDS) (Chinese translation Supplying reference above, if error, the English original shall prevail.)