Product introduction

Desmodos 0129 M is a mixture of 4,4'-, 2,4' and 2,2'-.diphenylmethane diisocyanates. Among them, the relative content of 2,4'-isomer is higher. This product is mainly used in the production of polyurethane products.

sampling

Prevent product from coming into contact with water vapour during sampling

  Specifications  

Typical properties 

  Package
       barrels, storage tanks, etc.

  Storage conditions  
       Recommended storage temperature: 20-30℃

 Shelf life 
    6 months (waterproof, airtight preservation)

Action suggestion  
       Like all isocyanates, Desmodur TP. PU 0129 M is very sensitive to water and reacts with water to produce insoluble urea and carbon dioxide. In a closed container, the carbon dioxide produced can cause a dangerous rise in container pressure.
Storing raw materials above 30°C will accelerate dimer formation and shorten product shelf life.
Storing Desmodur TP. PU 0129 M in a crystalline or partially crystalline state will also relatively accelerate dimer formation, which should also be avoided. If not many dimers are produced, the crystallized product can still be used by means of rapid melting. But pay attention to the melting temperature between 60 to 70 ℃. The temperature at which the product is heated cannot exceed 70°C. Once melting is complete, the product should be homogenized and cooled down to the recommended temperature for storage. Since this treatment will inevitably produce more dimers, it is recommended to use up the product as soon as possible. If air enters, especially if the product is exposed to light for a long time, it will contaminate the product, turn yellow, etc.