Hydrazide Crosslinker
Overview
Hydrazide crosslinkers are specialized chemical agents primarily used to create covalent bonds between polymer chains, enhancing material properties. These compounds contain reactive hydrazide (-CONHNH₂) groups that form stable crosslinks with carbonyl-containing polymers under mild conditions. Developed in the mid-20th century, hydrazide crosslinkers gained prominence for their ability to improve thermal stability and mechanical strength in various industrial polymers without requiring high-energy curing processes.
Physical and Chemical Properties
Hydrazide crosslinkers typically appear as crystalline powders with moderate solubility in polar solvents. Their reactivity stems from the nucleophilic nature of the hydrazide group, which readily forms hydrazone linkages with ketone or aldehyde functional groups in polymers. These compounds exhibit good thermal stability up to 150-200°C, making them suitable for applications requiring moderate heat resistance. The crosslinking reaction is often pH-dependent, with optimal performance in slightly acidic to neutral conditions.
Main Applications
In the coatings industry, hydrazide crosslinkers significantly improve film hardness and chemical resistance in water-based systems. They're particularly valuable for low-VOC formulations complying with environmental regulations. The textile industry employs these crosslinkers to create durable press finishes for cellulose fabrics, while the adhesive sector utilizes them to enhance bonding strength and creep resistance. Emerging applications include biomedical hydrogels and controlled-release drug delivery systems.
Safety and Storage
While generally classified as low-toxicity materials, hydrazide crosslinkers require standard chemical handling precautions. Use nitrile gloves and safety goggles to prevent potential skin/eye irritation, and ensure adequate ventilation during processing. Storage stability is excellent when kept in original containers at room temperature (15-25°C) with <50% relative humidity. Shelf life typically exceeds 24 months when properly sealed, though performance should be verified for critical applications after prolonged storage.
B2B Procurement Guide
Industrial buyers should specify technical requirements including: minimum active hydrazide content (typically 90-98%), particle size distribution for consistent dispersion, and residual solvent levels if applicable. Consider requesting samples for compatibility testing with your polymer system. Bulk purchases (500kg+) often qualify for 10-15% discounts, while custom modifications (e.g., increased solubility or delayed reactivity) may incur 20-30% premiums. Reliable suppliers include chemical majors like BASF, Evonik, and regional specialty manufacturers.
Related Manufacturers
- 主营：聚苯胺、脯氨酸甲酯盐酸盐、苄基三甲基氯化铵
- 主营：二氧化硒、对甲苯磺酸、黄血盐钠、过氧化苯甲酰、黄血盐钾、苯甲酸、环烷酸、戊二醛、磺化钛氰钴、盐酸羟胺、衣康酸、聚丙烯酸酯乳液、癸甲溴铵、癸甲氯铵、4丁炔二醇、马日夫盐、氟硅酸镁、聚乙烯吡咯烷酮k30、磷酸三丁酯、聚六亚甲基双胍、黄丹粉、红丹粉、牛肉浸膏、HEDP
- 主营：花生酸、碳酸钠、单氟磷酸钠、丁二酸二酰肼、丁基羟基茴香醚、鱼大豆酵母原料
- 主营：环戊酮、甲酸镍、草酸镧、阻燃剂、催化剂、杀螨剂、杀虫剂、抗粘剂、钼酸铵、钒酸铋、溴氨酸、硝酸锆、碳酸镧、白僵菌、磷酸铁、钨酸酐、氟化镧、视黄醇、叔丁醇、醋酸钬、氟化镥、肟菌酯、氢化钠、氯铂酸、氟化镁
- 主营：离子液体、5-二甲基吡唑、TS-钛硅分子筛、硫酸烟酰苯胺、丙酮缩氨基硫脲
- 主营：离子液体、5-二甲基吡唑、咪唑、催化剂、阻燃剂、钯碳催化剂、硫酸烟酰苯胺、正丁醇锆、四氟硼酸锂、香兰基丁醚、氟化物、全氟辛基三甲氧基硅烷、丙酮肟、双酚E型氰酸酯、叔丁基乙烯基醚、钛硅分子筛、丙酮缩氨基硫脲
- 主营：己二酸二酰肼厂家、麦芽糖酸、苯氧基环磷腈、甲巯基四氮唑
- 主营：甲基丙烯酸十二酯、甲基丙烯酸十六酯、甲基丙烯酸十八酯、V50引发剂、N-乙酰己内酰胺、硅烷偶联剂、双马来酰亚胺、N-异丙基丙烯酰胺、金属萃取剂、丙烯酸十二酯、丙烯酸十六酯、丙烯酸十八酯、偶氮二异丁咪唑啉盐酸盐、马来酸酯、缩水甘油酯、缩水甘油醚、甲基咪唑
- 主营：三甘醇、五氧化二钒、纯牛骨蛋白胨、粘土固化剂、牛油脂肪酸、氯偏乳液、苄基胂酸、漂粉精、苯甲醇、草酸镍、磷酸、六氟磷酸钾、次氯酸钙、钯碳、草酸钛钾、福美钠、戊二醛、碳酸钡、硝酸异辛酯、二甲基二硫代氨基甲酸、四氧化三铅、氯化锌、松醇油、磺化油、氟化氢钾
- 主营：雕白粉、雕白块、丙烯酸羟乙酯、过氧化苯甲酰BPO、丙烯酸羟丙酯、丙烯酸异冰片酯、甲基丙烯酸丁酯、甲基丙烯酸乙酯、甲基丙烯酸羟乙酯、丙烯酸
- 主营：反应活、hydrazide、糖蛋白、修饰剂、催化剂、激动剂、络合剂、荧光试剂、链接剂、连接子、聚合物、活性脂、胆固醇、钆特酸、催化性、dna标记、雨蛙素、乙二胺、ped结构、衍生物、化合物、反应物、生物素
- 主营：消泡剂、杀菌剂、润湿剂、乳化剂、交联单体、增稠剂、分散剂、爽滑剂、增塑剂、流平剂、vae乳液、附着力、上光油
- 主营：抗氧剂、阻聚剂、乙酸苄酯、苯磺酸
- 主营：DMF、DMAC、二丙酮醇、丁二酸二酰肼、四甲基胍、马来酸酐、丙二醇、乙二醇、甲酸、甲醇、十二醇、柠檬酸、己二醇、甘油、四氢呋喃、碳酸丙烯酯、吐温、无水氯化钙、乙酸乙酯、氢氧化钠、二乙醇胺、司盘、过硫酸钠、氧化钙、氯化钾
- 主营：水性上光油、双丙酮DAAM、吊白块、乳化剂、消泡剂、润湿剂、分散剂、除臭剂、表面活性剂、杀菌剂、硅烷偶联剂、二酰阱ADH、防腐剂、流平剂、引发剂、成膜助剂、OT75润湿剂、雕白粉、水性增粘乳液