Properties / Applications: Bayhydur 302 water-dispersible polyisocyanate is a solvent-free, water-dispersible crosslinking agent for two-component waterborne polyurethane coatings. Suitable coreactants are the hydroxyl-functional waterborne resins such as Bayhydrol® A-145. Bayhydur 302 is dispersed in the aqueous resin by direct addition and under agitation just prior to use. Reaction occurs under ambient conditions. The potlife varies depending on the coreactant and NCO:OH ratio. Coatings formulated with Bayhydur 302 water-dispersible polyisocyanate have good gloss and chemical resistance. These coatings have good flexibility while maintaining film hardness. Bayhydur 302 water-dispersible polyisocyanate is suitable for industrial finishing, special purpose substrates, and wood furniture. Bayhydur 302 water-dispersible polyisocyanate can also be used as an additive with waterborne dispersions to improve film properties. As with any product, use of Bayhydur 302 in a given application must be tested (including but not limited to field testing) in advance by the user to determine suitability.

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