Ultra-low-monomer-isocyanate-Bayer

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The coating and adhesive market is increasingly looking for a combination of consistently high product performance and an improved ecological profile.

Clear advantages in reduced monomer content

Desmodur® UL-75 XP, an aromatic poly-isocyanate based on toluene diisocyanate, combines the benefits of a proven poly-isocyanate product range with a reduced free monomer content. This ultra-low monomer advantage can be exploited in tried-and-tested 2K polyurethane formulations and existing application technologies – without the need for adaptations that a switch to new technology would necessitate. The ultra-low monomer content brings an additional advantage in labeling terms. In accordance with the "Globally Harmonized System of Classification and Labeling of Chemicals" (GHS), the Desmodur® UL-75 XP label merely displays the exclamation mark and the flame symbol.

Through this new ultra-low monomer addition to the Desmodur® family Bayer has written another innovative chapter in its poly-isocyanate story – one that meets the market's demand for a consistently high product performance combined with an improved ecological profile.

Equally powerful performance
The product data detailed below show that Desmodur® UL-75 XP performs as well as the traditional Desmodur® L-75 grade.

Comparison of Desmodur® L 75 and UL-75 XP grades in combination with Desmophen® 1300 in butyl acetate*

	Desmodur® UL-75 XP	Desmodur® L 75
Viscosity	12 s to 13 s (after 24 hr)	12 s to 13 s (after 24 hr)
König Hardness (120 μm)	71 (8 hr)	74 (8 hr)
König Hardness (120 μm)	140 (24 hr)	144 (24 hr)
Sand-dry (120 μm)	15 min	14 min
Touch-dry	2 hr 10 min	2 hr 4 min
Completely dry	6 hr 24 min	6 hr 4 min

* The values given represent a single batch-related evaluation.

The qualitative values of chemical resistance to acetone, butyl acetate, ethyl acetate, scratch resistance and elasticity are comparable.

Desmodur® UL-75 XP key product data: