Bayhydur® XP 2655

Covestro (formerly Bayer MaterialScience) 科思创

Bayhydur® XP 2655 is an hydrophilic aliphatic polyisocyanate based on hexamethylene diisocyanate (HDI) used as the hardener for waterborne two-component polyurethane systems. Bayhydur® XP 2655 is a crosslinking agent for waterborne systems from which reliable incorporation and high chemical resistances are required. Despite its relatively low hydrophilia, this hardener can be easily dispersed in the aqueous phase, even at low shear forces such as are typically found in trade applications. Coatings formulated with the product yield films with high gloss and very low haze. The increase in viscosity during mixing that is typical for hydrophilized hardeners, in particular with ionically hydrophilized polyol dispersions, can be controlled by prethinning with water or slight amounts of organic cosolvent.

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