The present invention provides polythiol oligomer formed by the reaction of at least two or more different dienes and at least one or more dithiol wherein stoichiometric ratio of the sum of the number of equivalents of all polythiols to the sum of the number of equivalents of all dienes used to form said polythiol oligomer is greater than 1.0:1.0; and wherein said two or more different dienes comprise (a) at least one non-cyclic diene and at least one cyclic diene; or (b) at least one aromatic ring-containing diene and at least one non-aromatic cyclic diene; or (c) at least one non-aromatic monocyclic diene and at least one non-aromatic polycyclic diene; Sulfur-containing polyurethane of the present invention can be prepared by combining polyisocyanate, polyisothiocyanate, or mixture thereof; the polythiol oligomer described above; and active hydrogen-containing material.
本发明提供了一种多
硫基寡聚物,其由至少两种或更多不同的二烯和至少一种或更多的二
硫醇反应形成,其中所有多
硫醇的当量数之和与用于形成所述多
硫基寡聚物的所有二烯的当量数之和的比例大于1.0:1.0;且所述两种或更多不同的二烯包括(a)至少一种非环状二烯和至少一种环状二烯;或(b)至少一种含芳香环的二烯和至少一种非芳香环的二烯;或(c)至少一种非芳香单环二烯和至少一种非芳香多环二烯。本发明的含
硫聚
氨酯可以通过将多
异氰酸酯、多异
硫氰酸酯或其混合物与上述多
硫醇寡聚物和含有活性氢的材料结合而制备。