| abstract |
The invention relates to a composition, containing 10 to 50 wt% of at least one polyisocyanate a-1) based on hexamethylene diisocyanate, containing at least one oligomeric polyisocyanate based on hexamethylene diisocyanate and optionally monomeric hexamethylene diisocyanate, and 50 to 90 wt% of at least one polyisocyanate a-2) based on isophorone diisocyanate, containing at least one oligomeric polyisocyanate based on isophorone diisocyanate and optionally monomeric isophorone diisocyanate, with the stipulation that at least one of the components a-1) and a-2) additionally comprises monomeric isocyanate of the respective type mentioned, and at least one component containing sulfur. The aforementioned mixture of the special component containing isocyanate groups has been shown to improve the thermal and mechanical properties of a cured composition. Molded bodies produced in such a way are suitable in particular for producing eyeglass lenses due to said properties, among other things. |