Covestro Desmodur RFE crosslinkers

Product Description

Storage Stability
Desmodos RFE must be kept in a sealed container. Whenever product is transferred from one container to another, moisture (including airborne moisture) must be prevented from entering. Therefore, when small quantities of product are to be used frequently, they should be taken not from large shipping containers but from specially designed bottles of appropriate size.
In addition to the original container, twist jars made of aluminum or glass are particularly suitable for storing Desmodos RFE. Suitable caps include screw caps with sealing gaskets. Gaskets made of materials that can release alkaline substances are not suitable.
  Crystals will form on storage of the product at low temperatures, but will dissolve upon slow heating (to room temperature).

Product Safety
Desmo is composed of polyisocyanate and ethyl acetate, the former has low volatility, while the latter is volatile and flammable. Therefore, precautions appropriate for use with flammable organic solvents must be taken. Dust mist from handling adhesives containing Desmodos RFE must be removed with an extractor fan to ensure that there is no risk of inhalation (see Safety Data Sheet for details).

Compatibility
Solvents that can be used to dilute Desmodur RFE are: methyl acetate, ethyl acetate, acetone, methyl ethyl ketone, and toluene. All these solvents must be free of water and alcohol.

Purpose
Properly formulated two-component adhesives have a limited pot life after the addition of Desmodo RFE and must therefore be used before the expiry date. The above pot life depends not only on the polymer content of the adhesive, but also on other ingredients such as resins, antioxidants and solvents.
After the pot life expires, which typically lasts from a few hours to a working day, the adhesive becomes increasingly difficult to process and its viscosity rises rapidly until the formulation eventually gels irreversibly.