VESTANAT H12MDI dicyclohexylmethane 4,4-diisocyanate VESTANAT H12MDI is a cycloaliphatic diisocyanate. It is a low viscosity liquid with a pungent odor. Specifications: Performance Value Unit Test method NCO content 31.8-32.0% by weight Calculated from GC purity ≥99.5% by weight of the total amount of chlorine gas chromatography ≤1000 ppm --- hydrolysis of chlorine content ≤10 ppm --- Typical parameters density (23 ℃) ≈ 1.07 g / cm3 DIN EN ISO 2811 Viscosity (25 ℃) ≈30 Mpa · s DIN EN ISO 3219 color (Hazen) ≤30 --- DIN / ISO 6271 Refractive Index (N25D) ≈1.496 --- DIN 51 423 second part of the vapor pressure (25 ℃) 2.1 · 10-5 hPa --- Flash point (closed cup) ≈200 ℃ DIN EN 22 719 lighted ≈25 ℃ --- nature and description: alicyclic diisocyanate VESTANAT H12MDI, used material polyurethane having excellent light stability, weather resistance and mechanical properties. It is particularly suitable for the manufacture of elastomers, aqueous PU dispersion and light curing polyurethane resin. In addition to its superior mechanical properties, VESTANAT H12MDI also shows excellent hydrolysis resistance and chemical resistance. And catalytic activity: aliphatic and alicyclic diisocyanate reactive than aromatic low. VESTANAT H12MDI usually require a suitable catalyst to accelerate the urethane reaction, it is recommended to use an organotin catalyst. (E.g. DBTDL or DBTDAc) If the reaction is carried out at a relatively high temperature, it may not necessarily be a catalyst. Storage and transport: VESTANAT H12MDI sensitive to moisture. If you can exclude the influence of moisture, in the case does not affect the quality of these standards can be stored for at least six months. VESTANAT H12MDI at a temperature lower than 25 ℃ will partially crystallized and deposited on the bottom, this is the case, before use 40-50 ℃ heat treatment and homogenization. VESTANAT H12MDI 200KG barrel with non-recyclable packaging supplier. Toxicity and Handling: information on the toxicity and treatment methods, see the material safety data for this product.