Ethacure 300 Diethylthiotoluenediamine 106264-79-3 Albemarle Crosslinking / Coupling / Curing Agents >> Amines /Amides PU - Prepolymers ADHESIVE ETHACURE 300 curative, a liquid aromatic diamine with low chronic toxicity, is an effective curative for polyurethane cast elastomers. It is used in both hot and room-temperature casting. Other uses include: a slower chain-extender for polyurethane-urea and polyurea elastomers in reaction injection molding (RIM), structural RIM (SRIM) and hand-applied and spray coating applications–alone or in blends with ETHACURE 100 Curative. Aromatic diamine curing agent for polyurethanes. Possesses a low chronic toxicity. Used in both hot and room-temperature casting. Can also be used as a slower chain-extender for polyurethane-urea and polyurea elastomers.