Bayhydrol A 242 is a water-thinnable polyacrylic resin containing hydroxyl groups. As a co-reactant for Bayhydur® and Desmodur® N polyisocyanates in the formulation of aqueous two-component polyurethane systems for various applications by brush, roller or spray. Properties / Applications: Bayhydrol A 242 is a water-thinnable hydroxyfunctional polyacrylic resin with emulsifying properties. It is neutralised with ammonia. Given the special composition of this product, both hydrophilic polyisocyanates, e.g. Bayhydur® 302, and hydrophobic grades, such as Desmodur® N 3400 and others, are suitable co-reactants. The resultant water-thinnable two-component system cures to yield a polyurethane film with good general properties. Only a small-scale polyurea reaction takes place. Suitable auxiliaries include: - Thickener to adjust the formulation to the optimum application viscosity
- De-aeration agent and antifoam
- Conservation agent
The amounts required should be determined empirically on the basis of the polyisocyanate used and the intended application. As with any product, use of Bayhydrol A 242 in a given application must be tested (including but not limited to field testing) in advance by the user to determine suitability.Information provided by Covestro |