Solubility / thinnability
Generally speaking, Desmodur®IL 1451 BA is well suited to thinning with esters such as ethyl acetate, butyl acetate, 1-methoxyproplyacetate-2 and aromatic hydrocarbons such as toluene, xylene, Solvesso® 100 and Shellsol® A. The solutions formed must be tested for their storage stability. In particular, prolonged storage of a solution with low binder content may result in
turbidity and sedimentation. The product cannot be reduced with mineral spirit.Alcohols react with Desmodur® IL 1451 BA and therefore may not be used.Only PU grade solvents (< 0.05 % water, free of other reactive impurities) may be used.
Compatibility
Desmodur® IL 1451 BA is compatible with Desmophen®A 450,many polyester-based Desmophen® grades and with alkyd resin,including combinations with nitrocellulose. In the critical combinations,Desmodur®IL 1451 BA exhibits better compatibility than the standard products based on TDI isocyanurates. Desmodur® IL 1451 BA can be combined with Desmodur® L/ultra L and also with Desmodur® HL and Desmodur® N/ultra N. The compatibility of Desmodur® IL 1451 BA with the other formulation components must be tested in advance.
Properties / Applications
The two-component polyurethane systems formulated with Desmodur® IL 1451 BA are characterized by their very rapid initial drying and early sandability, making them ideal for the industrial coating of wood and furniture. An NCO/OH ratio of approx. 0.5 – 0.7 is recommended as a function of the reactivity and hardness of the polyol. With an NCO/OH ratio of 1:1, the Desmodur® IL 1451 BA must be combined with Desmodur® L/ultra L. In this case, the optimal ratio of the Desmodur L/ultra L / IL 1451 is a function of polyol hardness and the required drying time. The low viscosity and high reactivity of the Desmodur® IL 1451 BA enables the formulation of clear and colored coatings with high solids contents. These can be applied quickly and only a few coats are required.
