Description Blocked aliphatic polyisocyanate (HDI homopolymer), supplied at 75 % solids in aromatic solvent. Specifications Colour 40 HAZEN (APHA) Viscosity at 25¡ãC 2500 - 4000 mPa.s NCO (available after deblocking) 11.2 0.5 % Solids content 75.0 2.0 % Free NCO < 0.2 % The analytical methods are available upon request Physical Properties Appearance Clear liquid Bulk density at 25¡ãC 1060 kg/m3 approx. Weight per US gallon 8.85 lbs approx. Flash point (closed cup) 49¡ãC approx. Equivalent weight (on delivery form) 375 g approx. Solubility Soluble in esters, ketones, aromatic hydrocarbons. In most cases, esters/aromatic hydrocarbon mixtures are used. Applications Tolonate™ D2 is typically used as a crosslinker of hydroxylated polymers notably polyesters and polyacrylates to prepare heat activated one component polyurethane systems for weatherable coatings giving excellent mechanical properties in conjunction with outstanding resistance to solvents, abrasion and chemical products. Tolonate™ D2 is commonly used in Automotive OEM formulations, can and coil coatings and other general industrial coatings on metal. The curing conditions are generally 20 to 40 minutes at 140-160¡ãC (285-305¡ãF) or 30 to 35 seconds at 320¡ãC (PMT = 232 / 241¡ãC).
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