Polyurethane technologies are known to offer many technical advantages over competing coating systems. Two-component polyurethane (2K PUR) coatings especially are seeing widespread use in application areas like the automotive sector, windmills, aircraft, transportation, etc. Although it is a well-established technology, there is constant pressure to improve and fine-tune technical properties like abrasion resistance, scratch resistance and outdoor durability. Regulations also force formulators to further reduce VOCs in high-solid (HS) formulations or change to waterborne (WB) solutions. Very low-viscous caprolactones can be a tool to influence both VOC and technical properties by lowering emissions and prolonging the life cycles of coating systems – important criteria for improved sustainability.
Perstorp has been producing polycaprolactones for 40 years and offers a range of polyols suitable for modifying and fine-tuning crosslinked coating formulations like 2K and 1K PUR systems. Properties of formulations based on conventional acrylics and polyesters can be tailor-made by the addition of polycaprolactone polyols.