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Advantages and applications of imidazole epoxy resin curing agents

2023-02-23 Industry news

Imidazole curing agents are a type of curing agents developed in recent years.。Imidazole compounds as new curing agents and accelerators for epoxy resin，unique：No high temperature curing required，Because its curing mechanism is similar to that of tertiary amines，It is anionic catalytic polymerization，But there is no chain transfer like tertiary amines that require high temperature curing.，So medium temperature curing is enough。The cured product has a high heat distortion temperature，Other properties are roughly the same as those of aromatic amine curing agents.。The alkalinity of imidazole curing agents is relatively weak，Low volatility and no odor，Also more toxic than aliphatic、Aromatic amines are much smaller；Good thermal stability，Usually they hardly decompose below 250℃。 Imidazole and its modified epoxy curing agents are a very important anionic polymerization epoxy resin curing agent.，Less dosage，Long shelf life，Medium temperature solidification，Low volatility，Low or no toxicity，Excellent cured properties，Has outstanding bonding strength，Has excellent heat resistance、Mechanical properties and electrical insulation。Now there are many varieties such as 2MI、2NO、2E4MI、2PI and 2P4MI are both excellent curing agents，Also exhibits unique and excellent properties as a curing accelerator。 Imidazole and its derivatives are mainly used as curing agents for epoxy resins。With the development of industry，Demand is increasing year by year，Modified imidazole curing agent is also commonly used in adhesives、Sealants、coating、Potting sealing materials and composite materials。

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Explanation of various indicators of aziridine cross-linking agent

2023-02-23 Industry news

Aziridine cross-linker is a solvent-free、Aziridine cross-linking agent with solid content greater than 99%，Widely used in leather、textile、ink、coating、pressure sensitive adhesive、Adhesive、Curing agents and other fields，Washing resistance of its cross-linked film-forming products、wipe、Chemicals、and adhesion on the substrate are significantly improved.； This cross-linking agent is an environmentally friendly cross-linking agent，No harmful substances such as formaldehyde are released after cross-linking，And the finished product is non-toxic after cross-linking、Tasteless； The amount of increase is generally 1-3% of the solid content of the emulsion，It is better to add a lotion with a pH value of 8-9，Do not store in acidic media (PH<7) used in； The aziridine cross-linking agent mainly reacts with the carboxyl groups in the emulsion.，It can also be combined with amine groups under strong acid catalysis、Hydroxyl produces cross-linking reaction，Therefore, aprotic organic bases should be used as much as possible when adjusting the pH value of the system.； The aziridine cross-linking agent can produce cross-linking reactions at room temperature，But the baking effect is better at 60-80 degrees； This cross-linking agent is a two-component cross-linking agent，Once you join the system, you should use it within two days.，Otherwise, partial gelation will form； The cross-linking agent is miscible with water and common solvents，therefore，Generally, it can be mixed directly into the system under vigorous stirring.，It can also be dissolved in water and solvent first and then added to the system.； The cross-linking agent is at room temperature、Storage period 24 months under sealed conditions；non-flammable、Explosives，But it is corrosive to a certain extent，Classified as dangerous goods。

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Ningxia Zhuoyu New MaterialsLocated in Ningdong Energy and Chemical Industry Base, Ningxia，It is a national-level "specialized, special, new and small giant" enterprise.，Participate in setting group standards，Possess registered trademarks and multiple authorized patents。The main business is the R&D and production of aziridine series and imidazole series products.，Products are widely used in many fields。The company has passed multiple management system certifications，In the future, we will strive to become the world's leading service provider of special chemicals.。

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