Epoxy Anhydride Curing Agent
Overview
Epoxy Anhydride Curing Agents are critical components in thermosetting epoxy systems, enabling polymerization through esterification reactions. They are preferred for applications requiring high heat resistance and mechanical strength, such as in aerospace or electrical industries. Unlike amine-based hardeners, anhydrides offer lower exothermic reactions, minimizing stress in thick castings. Their compatibility with accelerators like tertiary amines allows tailored cure speeds for diverse processing conditions.
Physical and Chemical Properties
Most commercial epoxy anhydride curing agents are liquids at room temperature or low-melting solids for easier handling. Their viscosity ranges from 100-500 mPa·s, facilitating mixing with resins. Key chemical traits include reactivity with hydroxyl groups and hydrolytic sensitivity. Thermal stability exceeds 150°C post-cure, with glass transition temperatures (Tg) up to 180°C achievable. Electrical properties include volume resistivity >1×10¹⁵ Ω·cm and dielectric strength >30 kV/mm, making them ideal for insulating applications.
Main Applications
In electrical industries, these curing agents are used for transformer castings and semiconductor encapsulation due to their low ionic impurity content. Wind turbine blade composites leverage their fatigue resistance and adhesion to glass fibers. The automotive sector employs them in brake components and under-hood adhesives, where thermal cycling stability is critical. Specialty coatings for chemical tanks utilize anhydrides' corrosion resistance and low shrinkage during curing.
Safety and Storage
Anhydride curing agents require strict moisture control—storage tanks should include nitrogen blankets or desiccants. Decomposition above 200°C may release irritating phthalic acid vapors, necessitating fume hoods during high-temperature processing. Personal protective equipment (PPE) must include nitrile gloves and goggles, as skin contact may cause delayed irritation. Spill kits should contain non-reactive absorbents like vermiculite, never water-based solutions.
B2B Procurement Guide
Industrial buyers should verify anhydride equivalent weight (typically 140-170) to calculate stoichiometric ratios with resins. Bulk shipments often require heated tankers or drums to maintain liquidity. Quality certifications like ISO 9001 and RoHS compliance documents should be requested. For offshore procurement, consider crystallization risk during transit—some formulations require winter-grade additives below 15°C.
Related Manufacturers
- 主营：固化剂、聚甲氧基二甲醚
- 主营：抗氧剂、乳化剂、苯扎氯铵、固化剂、烷基二甲基、氢化蓖麻油、表面活性剂、双链季胺盐、聚氧乙烯醚、二丁基羟基甲苯、甘油聚氧丙烯醚、十二烷基硫酸钠、树脂、助剂
- 主营：石油醚、航空煤油、二氯甲烷、甲基四氢邻苯二甲酸酐、溶剂油、三氯乙烯、醋酸乙酯、甲酸、碳酸二甲酯、乙醇、异丙醇、二甲基甲酰胺、冰醋酸、二甲苯、醋酸丁酯、正丁醇、环己酮
- 主营：溶剂油、二氯甲烷、三氯乙烯、环氧树脂固化剂、乙酸乙酯、石油醚、航空煤油、碳酸二甲酯、甲酸、醋酸丁酯、冰醋酸、正丁醇、环己酮、异丙醇、乙二醇丁醚
- 主营：乙二醇、柠檬酸、山梨醇、环氧树脂固化剂、酒石酸、硬脂酸、增稠剂、二甘醇、防腐剂、工业纯碱、新戊二醇、1.4丁二醇、食用纯碱、aes洗洁精、碳酸氢钠、无水硫酸钠、活性稀释剂、葡萄糖酸钠、表面活性剂、三羟甲基丙烷、甘油
- 主营：乙酸镁、阻燃剂、热熔胶、环氧树脂、聚合物、锂电池、光电极、泡泡糖、氯丁胶、碳酸镉、新癸酸、补差价、稀释剂、羟乙基、氧化铝、氧化铜、甲酸钾、c/c材料、碳酸锰、玻璃粉、硬光油、防腐剂、氧化铋、防水剂、聚丙烯、增粘树
- 主营：阻燃剂、四氢苯酐、新戊二醇、环氧树脂固化剂、聚乙二醇、玉米淀粉、农用肥料、一水柠檬酸、食品添加剂、半精炼石蜡、食用葡萄糖、树脂增塑剂、饲料添加剂、表面活性剂、营养填补剂、甘油丙三醇、防静电增溶剂、有机化工原料、饲料级蛋氨酸、l-赖氨酸硫酸盐、有机合成中间体、十二烷基硫酸钠
- 主营：氧化镁、分析试剂、彩釉调料、固化剂、甘油缩甲醛、山楂提取物
- 主营：不饱和聚酯树脂191、不饱和聚酯树脂196、不饱和聚酯树脂198、环氧树脂、5#固化剂、环氧砂浆、丙烯酸固化剂、环氧固化剂、2#固化剂、5#促进剂、油性色浆、水性色浆、玻璃钢原料、防腐树脂、调色色浆、过氧化苯甲酰糊、不饱和聚酯树脂、过氧化苯酰糊、水性工业漆、快干型原料、玻璃丝、过氧化甲乙酮、不饱和树脂促进剂
- 主营：胶黏剂、707防水、1788颗粒、固化剂、bp05pva0588、bp24pva2488、硫酸铜五、粉末颗粒、丙乳液vae、可乐丽pva、水性油墨、碳酸氢钠、聚乙烯醇、软泡黑料、溶性树脂、聚乙二醇、偏苯三酸、醋酸乙酸、树脂合成、尼龙切片、产原包装、双酚a聚碳、205pva2050588、聚季铵盐-7、16醇十六醇
- 主营：粘接胶、阻燃剂、醛树脂、固化剂、热熔胶、共聚物、防滴剂、聚醚胺、压敏胶、聚合物、抗菌剂、溶剂墨、结构胶、亨斯迈、焊锡膏、灌封胶、邻苯二、汽车胶、玻璃胶、杀菌剂、磺酸钠、减震垫、蜡乳液、防老剂、软树脂、变压器
- 主营：科思创、阻燃剂、igmresins、固化剂、盛禧奥、乳化剂、热熔胶、催化剂、共聚物、苏达山、共荣社、意慕利、胶粘剂、苯甲醇、聚丙烯、消泡剂、硫酸钡、成核剂、丁二烯、东洋纺、添加剂、润滑剂、橡胶nbr、亨斯迈、聚酰胺
- 主营：二十醇、键合剂、环戊酮、钒酸酐、磷酸酐、甲醇钾、聚醚胺、正辛烷、三甲胺、二聚酸、双甲酮、戊二醇、异戊烷、正癸醇、新癸酸、清洗剂、水合物、异戊醇、磷酸酯、异辛烷、氯化锌、化妆品、苯甲胺、水芹醛、正壬醇