Isocyanate-based prepolymers

摘要

The present invention relates to an isocyanate-containing prepolymer obtainable by (a) contacting at least one isocyanate with at least one isocyanate-reactive compound and (b) contacting the product of step (a) with at least one amine; wherein said at least one isocyanate-reactive compound comprises at least one OH group; wherein the molar ratio of the NCO of said at least one isocyanate, to the OH of said at least one isocyanate-reactive compound is of at least 2.0; wherein said at least one isocyanate-reactive compound has a number average molecular weight of at least 2000 Da; and wherein the molar ratio of said at least one amine, to the NCO of the product of step (a) is greater than 0.4. The present invention also relates to a process for preparing said isocyanate-containing prepolymer. The present invention also relates to the use of said isocyanate-containing prepolymer, and to a product comprising said prepolymer.