Process for binding cork.

摘要

Process for binding cork comprising the steps of a) bringing cork material in contact with a polyisocyanate composition and b) subsequently allowing said cork material to bind, wherein said polyisocyanate composition comprises an isocyanate-containing prepolymer composition having an NCO content of from 2 to 25 % by weight as obtainable by reacting an isocyanate-reactive polymer composition having an average nominal functionality of from 1.8 to 6, and an average equivalent weight of from 500 to 7000 with a stoichiometric excess of a diphenylmethane diisocyanate composition.