| 摘要 |
A two-component adhesive comprising a first component (A) and a second component (B). First component contains a monomeric polyisocyanate, more particularly monomeric diisocyanate, and an isocyanate-terminated prepolymer and/or a prepolymer mixture with isocyanate functionality ≧1.7, preferably in the range of 1.7<fNCO<3, more preferably in the range of 2<fNCO<3. The second component contains a di- and/or polyamine, preferably a polyether diamine and/or a polyether polyamine, and also at least one trimerization catalyst. The stoichiometric ratio of isocyanate groups in the first component (A) to isocyanate-reactive hydrogen atoms present in the composition, more particularly reactive hydrogen atoms of the di- and/or polyamine, in the second component (B), is from 7.5 to 25, preferably from 10 to 20, particularly preferably 15. A two-component adhesive of this type has better handling properties and is more versatile and, after hardening, it is strong and has low brittleness. |
