S,s' -bis-(alpha, alpha' - disubstituted - alpha - acetic acid) - trithiocarbonates and polymers thereof for toughening thermosetting resins

摘要

A toughener comprising a trithiocarbonate polymer having an epoxy end group is described which is utilized with various thermosettable polymers such as epoxy, polyurethane, and the like. A toughened composition is made by curing the thermosettable polymer and the toughener utilizing various curing agents.