An ultra-low viscosity PIC brings benefits in refinishing work
Is a polyisocyanate (PIC) with a viscosity of less than 100 mPas realistic? Desmodur® XP 2730 breaks this barrier to offer significant benefits, especially in smart combinations with other products from the Bayer MaterialScience PIC range or in appropriate systems as a unique hardener.
The polyisocyanate with the world’s lowest viscosity helps to solve the challenge of combining less solvent and easy processing with application versatility in 2K PUR systems. Up to now, low viscosity in binders, for example, was achieved by synthesizing smaller molecules – at the expense of performance. Bayer MaterialScience has succeeded in optimizing the polyisocyanate side of the 2K PUR equation by decreasing solvent content and improving processing.
If 20% of Desmodur® XP 2730 is used as a reactive thinner, the viscosity of the hardener and the complete system can be reduced by up to 80%. In solventborne 2K PUR systems, e.g. for refinishing, Desmodur® XP 2730 brings a clear VOC advantage with no deterioration in performance. The clear benefit in waterborne 2K PUR systems is easy mixability with the aqueous polyol, which results in an exponential improvement in gloss and appearance due to reduced particle size. Furthermore, less entrapped air, less foam and a lower need for additives or solvents are convincing arguments for Desmodur® XP 2730 in waterborne 2K PUR formulations. This gives the paint industry greater freedom in formulation. Though hydrophobic, Desmodur® XP 2730 mixes well with water-borne polyols and hydrophilic Bayhydur®, optimizing the polyisocyanate side of 2K PUR paint systems.
Get more information:
For a face-to-face discussion of your individual questions and needs please get in touch with your regular contact at our distribution partners or at our local agents.
