苯并咪唑二胺、聚苯并咪唑酰亚胺及其制备方法与应用
By preparing benzimidazole diamine with a specific structure as an intermediate, and combining condensation, cyclization and hydrogenation reactions, polybenzimidazole imide was prepared, which solved the problem of insufficient thermal stability of traditional polybenzimidazole imide and achieved improved high thermal stability and mechanical properties.
CN119306669BActive Publication Date: 2026-07-17CHINA NUCLEAR POWER TECH RES INST CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHINA NUCLEAR POWER TECH RES INST CO LTD
- Filing Date
- 2024-09-23
- Publication Date
- 2026-07-17
AI Technical Summary
Technical Problem
The thermal stability of traditional polybenzimidazole imides needs further improvement.
Method used
Using benzimidazole diamine with a specific structure as an intermediate, polybenzimidazole imide was prepared through condensation, cyclization and hydrogenation reactions. Polyimide films were then prepared by polycondensation in combination with diacid anhydrides and aprotic organic solvents.
Benefits of technology
While ensuring high glass transition temperature and thermal decomposition temperature, the linear expansion coefficient of polyimide is reduced, while Young's modulus, tensile strength and elongation at break are increased, thereby improving the thermal stability of polyimide.
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Figure CN119306669B_ABST
Abstract
本申请涉及一种苯并咪唑二胺、聚苯并咪唑酰亚胺及其制备方法与应用。苯并咪唑二胺的结构式如式（I）所示：；其中，R1、R2分别独立地选自氢、取代或未取代的C1~C8烷基。该特定结构的苯并咪唑二胺包含联苯基和咪唑环，将其用于制备聚酰亚胺，在保证聚酰亚胺的玻璃化转变温度和热分解温度较高的基础上，有效降低聚酰亚胺的线性膨胀系数，同时还可有效提升聚酰亚胺的杨氏模量、拉伸强度和断裂伸长率，使聚酰亚胺具有较好的热稳定性能。
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