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A method for the simultaneous production of pure 4,4 '- diphenylmethane diisocyanate and a poly phenyl - - polymethylene polyisocyanate mixture, poly phenyl poly methylene - polyisocyanates and their use for the production of polyurethane paints
A method for the simultaneous production of pure 4,4 '- diphenylmethane diisocyanate and a poly phenyl - - polymethylene polyisocyanate mixture, poly phenyl poly methylene - polyisocyanates and their use for the production of polyurethane paints