Sulfur-modified copolyether glycols, a method for preparing them, and polyurethanes prepared therefrom

摘要

Copolyether glycols are modified so that they contain 1-25%, by weight of beta , beta '-dihydroxyalkyl sulfide moieties. These modified copolyether glycols have enhanced resistance to degradation by heat and oxygen. The invention also relates to a method of making the modified copolyether glycols, to their use as stabilizers against the degradation of the polyether chains, and to polyurethanes made with them.