Enhanced TDS
Identification & Functionality
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Applications & Uses
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Properties
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Storage & Handling
- Storage Condition
Store in a dry place at 18 to 40°C
Keep container closed as moisture contamination will induce an exothermic reaction with evolution of CO2 which may cause dangerous pressure generation.
Caution: Polyurethanes or polyisocyanurates produced from this product may present a fire risk in certain applications if exposed to fire and/or excessive heat, e.g. welding and cutting torches, in the presence of oxygen or air.
Drum Storage: VORANATE™ T-80 Isocyanate will react when exposed to atmospheric moisture. Where drums are to be partially emptied, it is recommended that a calcium chloride-filled dryer tube be used in the air bleed opening. Should VORANATE™ T-80 Isocyanate be exposed to moisture, a skin will develop on its surface similar to that found on paint. Normally, however, the remaining liquid VORANATE™ T-80 Isocyanate under the skin may be used without formulation changes.
Due to an exponential change in viscosity at low temperatures, VORANATE™ T-80 Isocyanate should be stored at temperatures above 18°C to facilitate pouring.
At temperatures below 15°C, a partial crystallisation of VORANATE™ T-80 Isocyanate may occur. The crystallised material can be remelted at 35°C. For detailed procedures consult your nearest Dow sales office.
Bulk Storage: Construction material for tanks, lines, pumps, etc. can be mild steel for storage at temperatures up to 35°C. Series 300 stainless steel or stainless cladding is recommended for storage at temperatures above 35°C. Transfer pumps should contain a stainless steel shaft with mechanical seals. Packed glands can leak sufficiently to cause reaction with moisture and subsequent scoring of the pump shaft by the formed ureas. Only low temperature heating media should be used in tank jackets or coils unless adequate circulation or agitation of VORANATE™ T-80 Isocyanate is maintained. A slight positive pressure using dry inert gas (-40°C dew point) must be maintained over stored VORANATE™ T-80 Isocyanate to prevent solids formation that can occur in the presence of atmospheric moisture.