Alternative Chain Extenders to MOCA

Several of these have been introduced in recent years and the more promising ones are given below. 

The isomer mixture of di(methylthio)-2,4-toluene diamine and di(methylthio)-2,6-toluene diamine (Ethacure 300) 

For a typical commercial PU cast elastomer prepolymer diamine system the following properties are obtained, when MOCA and Ethacure 300 are compared as shown in Table 5.15. 

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