1、Facile synthesis of bio
In this work, a novel latent curing agent was developed from IM and PA and high glass transition temperature was achieved for the cured one-component epoxy. A 6-coordination compound PAIM was obtained by salt-forming reaction of phytic acid and IM.
2、Imidazolium Phosphinate Ionic Liquids as Latent Curing Agents for Epoxy
This work establishes IMPILs as a novel class of liquid latent curing agents that satisfy both long-term storage requirements and excellent thermal-curing performance for advanced epoxy composites.
3、Advanced Latent Curing Agents for Epoxy Resin Systems: Enhanced Control
Discover innovative latent curing agents for epoxy resins offering superior storage stability, precise curing control, and enhanced performance characteristics. Perfect for industrial applications requiring controlled activation and optimal mechanical properties.
4、Latent Curing Agent of Epoxy Resin Based on Bio
DCPD-ER/V-fa can cure at a high temperature, which is attributed to the reaction between phenolic hydroxyl groups produced by ring-opening reaction of the benzoxazine and epoxy groups.
Thermal curing of epoxy resins at lower temperature using 4
We revealed reaction mechanism of epoxy polymerization by the thermal latent 4MAPy, using Matrix-assisted laser desorption ionization–time-of-flight mass spectrometry, Fourier transform infrared spectroscopy (FT-IR), and 1 H NMR analyses of the model polymerization of phenyl glycidyl ether.
Epoxy Curing Agents – Latent Curing Agents for One Component Systems
Latent curing agents are clearly the choice for one component heat activated epoxy systems. Latency is achieved through either physical insolubility or lack of chemical reactivity at room temperature, and the reactivity, solubility, and latency all must be carefully balanced.
Latent curing epoxy system with excellent thermal stability, flame
To obtain a latent curing epoxy system with satisfactory thermal stability, flame retardance and dielectric properties, imidazolium dibenzo [c,e] [1,2]oxaphosphate (IDOP) was synthesized by a facile way and utilized as a latent flame-retardant curing agent for epoxy resins (EP).
Thermally
Latent curing agents are not active at room temperature, but they will react with epoxy resin by the application of an external force like heat or light. Thermally-latent curing agents are well-known and they are widely used.
Novel Thermal Latent Curing Agents for Epoxy Resins Based on Dual
Herein, we present a dual-locked thermal latent curing agent based on aminopyridines, protected by amidation and N-oxidation, designed to enhance both pot life and final curing efficiency.
Choosing the Right Latent Epoxy Curing Agent: A Buyer's Guide
Among the most valuable types are latent epoxy curing agents, prized for their ability to remain dormant until triggered by specific conditions, typically heat.
In modern industrial manufacturing, epoxy resin is widely used in various fields due to its excellent mechanical properties, electrical insulation, and chemical stability. the applications of epoxy resin are not limited to traditional coatings and adhesives. It can also form hard, wear-resistant coatings through high-temperature curing, playing a critical role in aerospace, automotive manufacturing, construction, and other industries.
Epoxy latent high-temperature curing agents are essential materials for achieving high-temperature curing of epoxy resins. These curing agents provide necessary chemical or physical stimuli during the curing process, ensuring smooth progression. They are typically available in liquid or powder forms and gradually release energy during curing, initiating the cross-linking reaction of the epoxy resin.
There are many types of epoxy latent high-temperature curing agents, which can be classified based on their composition, application environments, and curing characteristics. Below are some common types and their features:
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Amine Curing Agents: This is the most common category, including aliphatic and aromatic amines. They react with active hydrogen atoms in epoxy resins to promote curing. Amine curing agents offer good thermal stability and chemical resistance but may produce irritating odors in some cases.
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Anhydride Curing Agents: Examples include phthalic anhydride (PMDA) and dibasic phthalic anhydride (DBPDA). These agents cure epoxy resins through acylation reactions with hydroxyl groups. Anhydride curing agents exhibit high reactivity and fast curing speeds, but strict control of reaction conditions is required to avoid issues caused by excessively rapid curing.
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Imidazoline Curing Agents: These include imidazolidinones and imidazolidinone salts. They cure epoxy resins via addition reactions with active hydrogen atoms. Imidazoline curing agents have good thermal stability and chemical resistance but may also emit irritating odors.
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Other Epoxy Latent High-Temperature Curing Agents: Besides the above, other options include phenolic resins, urea resins, and more. These agents vary in properties and applications, allowing selection based on specific needs.
When selecting epoxy latent high-temperature curing agents, several factors must be considered to ensure optimal curing performance. First, the type of epoxy resin and desired curing conditions should guide the choice of curing agent. Different epoxy resins may require specific curing agents for best results. Compatibility between the curing agent and epoxy resin is also crucial; incompatibility can lead to failed curing or reduced performance. Additionally, volatility and toxicity of the curing agent must be evaluated to ensure safe operation.
The application of epoxy latent high-temperature curing agents is vital to the performance of epoxy resins. By choosing appropriate curing agents, desired properties such as mechanical strength, temperature resistance, and corrosion resistance can be achieved under specific conditions. For example, in aerospace, coatings must withstand extreme heat and pressure, necessitating curing agents with high thermal stability. In automotive manufacturing, priorities like wear resistance and durability may dictate the selection of curing agents.
Advances in technology and new materials have driven continuous innovation in epoxy latent high-temperature curing agents. Emerging options, such as biodegradable curing agents, enhance environmental friendliness by reducing pollution. Meanwhile, nanotechnology offers new opportunities for improving curing agent performance and cost-effectiveness.
Epoxy latent high-temperature curing agents are indispensable to the practical application of epoxy resins. Through in-depth understanding of their types, properties, and applications, epoxy resins can better meet industrial demands across diverse fields. In the future, ongoing research and technological progress will drive further innovation and breakthroughs in the use of these curing agents.
