Exceptional Gloss Retention

Polyurethane coatings made from aliphatic polyisocyanates have exceptional gloss retention thanks to:

• The lack of phenyl group
  It makes polyurethane coatings prepared from aliphatic polyisocyanates less prone to oxidation rather than those prepared with an aromatic hardeners
• The resistance of the urethane bond when exposed to UV light

Aliphatic polyisocyanates provide very good durability to polyurethane coatings. Their use is recommended for applications where maintaining outstanding aesthetics is required over time.

The graph below show comparison between a 2K polyurethane coating and a 2K epoxy coating in terms of gloss evolution during exposure to UV-A light (standard accelerated weathering test).

Figure 1: Gloss retention comparison between epoxy and polurethane coatings

The 2K polyurethane coating prepared from aliphatic polyisocyanates clearly shows better gloss retention.