Diepoxy reactive diluents

The polyglycol diepoxies are used primarily as flexibilizers and reactive diluents. Commercial products are available where n varies from 2 to 7. Generally, these are used in the range of 10 to 30 percent by weight with DGEBA or epoxy novolac resins to improve flexibility without a significant loss in physical properties. 

Diepoxy and polyepoxy reactive diluents. Diepoxy or polyepoxy reactive diluents are incorporated in order to preserve physical properties at elevated temperatures. These diluents will not reduce system functionality and in some cases will result in an increase in system cross-linking density. They can be used in higher concentrations than can the monoepoxy diluents to obtain the desired reduction in viscosity. Some examples are shown in Figure 2.13. 

Figure 2.13 Diepoxy and polyepoxy reactive diluents. Molecular weights are shown in...

The modifying performance of cycloaliphatic monoepoxides in the curing processes of cycloaliphatic diepoxy compounds was described in [75]. ACECs are very efficient as modifiers of epoxyamine [76] and epoxynovolak [77-79] resins. The search for reactive diluents for epoxy compositions was initially directed towards an improvement of the processing characteristics, in particular the viscosity suppression, whereas the increase in mechanical strength and heat resistance was considered to be the result of the improved processing character-... 

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