中国胶粘剂

以特种环氧树脂作为基料，改性脂环胺为固化剂，配以增韧剂、填料，制备出剪切强度高、耐热性好、储存稳定的耐热型金属修补剂。重点考察了特种环氧树脂、固化剂、增韧剂、填料以及固化条件对金属修补剂性能的影响。研究结果表明：选用E-51与AG-80作为主体树脂时，胶体的交联程度得到了提高，在140℃下仍有较高的剪切强度；选用改性脂环胺SF-2351作为固化剂，其脂环和长链的结构，不仅保证了胶体力学性能，还提高了热变形温度；当增韧剂QS-330C添加量为树脂质量的10%时，不仅保证了胶体的热变形温度，还提高了胶体的力学性能；选用铁粉和硅微粉配合作为填料，当添加量为50%时，胶体黏度适中，无沉降情况，且提升了力学性能；通过不同固化条件下剪切强度的对比，发现胶体在室温固化条件下就可以达到较为完整的固化程度。

A heat-resistant metal repair agent with high shear strength,excellent heat resistance,and stable storage was prepared by using special epoxy resins as the base materials,modified alicyclic amine as the curing agent,and incorporating toughening agent and filler.The effects of special epoxy resins,curing agents,toughening agents,fillers,and curing conditions on the properties of metal repair agent were investigated emphatically. The research results showed that when E-51 and AG-80 were selected as the main resins,the crosslinking degree of adhesive was improved,and there was still a high shear strength at 140 ℃.Using modified alicyclic amine SF-2351as the curing agent,its alicyclic and long-chain structure not only ensured the mechanical properties of adhesive,but also increased the thermal deformation temperature.When the amount of toughening agent QS-330C added was 10% of the resin mass,it not only ensured the thermal deformation temperature of adhesive,but also improved the mechanical properties of adhesive.Using iron powder and silicon micro powder as fillers,when the addition amount was 50%,the adhesive viscosity was moderate,there was no sedimentation,and the mechanical properties were improved. By comparing the shear strength under different curing conditions,it was found that adhesive could achieve a relatively complete curing degree under room-temperature curing conditions.