Dual-curable formulation was used to prepare epoxy prepregs with tailored tack and drape. The obtained formulation had enhanced stability during the storage which eliminates the instability as the main drawback of prepregs. Diethylenetriamine was used as a low-temperature curing agent in the off-stoichiometry ratio for pre-curing and dicyandiamide was used as a latent curing agent for final curing. DSC Tests showed that simultaneous presence of two curing agents with different reactivities results in two different curing reaction without interference. FT-IR and DSC tests showed that the inactivity of latent curing agent in the pre-curing step causes to the loss of thermal history. The FT-IR tests showed only a 7% increase in conversion after 21 days of storage at room temperature. Tack and drape as main parameters of epoxy prepreg were tailored by adjusting the degree of cure based on using different amount of double curing agents.

双固化配方用于制备具有预定粘性和悬垂性的环氧预浸料。所获得的制剂在储存期间具有增强的稳定性，这消除了作为预浸料的主要缺点的不稳定性。二亚乙基三胺按化学计量比的比例用作低温固化剂进行预固化，而双氰胺则用作潜在的固化剂进行最终固化。DSC测试表明，同时存在两种具有不同反应性的固化剂会导致两种不同的固化反应，而不会产生干扰。FT-IR和DSC测试表明，潜在的固化剂在预固化步骤中的失活导致了热历史的损失。FT-IR测试表明，在室温下存放21天后，转化率仅增加7％。