Desmodur L75 TDI isocyanate curing agent

Systems crosslinked with Desmodur L 75 can be used as coatings for furniture, parquet flooring, metal, paper, plastics and mineral substrates.

Desmodur L 75 is also suitable for room-temperature crosslinking of adhesives based on Desmocoll or Baycoll. These can be used to bond many materials, e.g. wood, metal and plastic. The use of this polyisocyanate increases the resistance of the bonds to heat, oil, plasticisers and many solvents. It ensures good adhesion to many materials, especially plastics. The pale inherent color of Desmodur L 75 permits its use in bonding transparent plastic films for packaging.

As with any product, use of Desmodur L 75 in a given application must be tested (including but not limited to field testing) in advance by the user to determine suitability.

                      *These values provide general information and are not part of the product specification.

Solubility  and  Compatibility

1, In general, Desmodur L 75 has good compatibility with esters such as ethyl acetate, butyl acetate and 1-methoxypropylacetate-2 and aromatic hydrocarbons such as toluene, xylene, Solvesso ™ 100 and ShellSol ™ A. However, the solutions formed must be tested for their storage stability. The product is not compatible with aliphatics. Alcohols react with Desmodur L 75 and therefore cannot be used.

2, Prolonged storage of a solution with low binder content may result in turbidity and sedimentation.

3, Only PU grade solvents should be used (< 0.05% water). The solvent should not contain reactive groups.

4, In general, Desmodur L 75 is compatible with many polyesters, polyethers and polyacrylates, as well as with other Desmodur grades.

Storage

1, Desmodur L 75 should be stored in tightly sealed original containers and protected from moisture, heat, and foreign materials. Storage at higher temperatures will result in increase of color and viscosity. Storage at significant lower temperatures will result in solidification. This solidification is reversible by briefly heating the product without adversely affecting the quality of the product. Recommended storage temperature is 0º-30ºC.

2, Desmodur L 75 has a shelf life of six months from date of receipt at customer, provided the material is stored in sealed original containers at the recommended storage temperature.