Mondur 1566 is a high monomer, modified MDI containing a high percentage of 2,4 ’-MDI isomer. Properties / Applications: Mondur 1566 can be used in combination with polyols for the production of polyurethanes and isocyanate terminated prepolymers. As with any product, use of Mondur 1566 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 |