Heat Cure Anhydride Curatives

Phthalic anhydride and its hydrogenated derivatives are among the more common anhydride curatives. They provide more rigidity to the cured epoxy resins than linear anhydrides because of the cyclic structures and the ability to crosslink multifunctional epoxy resins. Tetrahydrophthalic anhydride (56) and it derivatives, such as methyltetrahydrophthalic anhydride have been described in coating and adhesive compositions 

substituted and unsubstituted alkyl, substituted and unsubstituted aryls 

R = alkyl, aryl, substituted alkyl, substituted aryl R = R, carbonyl 

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