In the second step, reactions for the preparation of NCO-terminated PUPrepolymer were carried out. The amount of the polyol component was chosen based on the determined OH-content so that the final NCO-content should be around 8.6%,
which is equivalent to the NCO-content of Desmodur E22 value given from the suppliers data sheet. Raw materials that we used for this experiments were, Voranol, that was supplied to us as flakes, Desmophen and Desmodur 44M (diphenylmethane- 4,4'-diisocyanate).