1、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.

2、Thermal curing of epoxy resins at lower temperature using 4

To expand the application fields of epoxy resins, there has been a growing demand for thermal latent curing agents that combine a lower curing temperature with a long storage lifetime for a one-component epoxy formulation.

3、Liquid phosphorus

Herein, two liquid phosphorus-containing bis-imidazole compounds, PPDM and DPCMI, were synthesized as latent curing agents for EP, demonstrating multiple effects in improving latency, thermal stability, mechanical properties, and fire safety.

4、A latent curing agent for rapid curing of phenolic epoxy resin

Developing effective latent curing agent for rapid curing of epoxy resins at low temperatures remains challenging. This study reports a latent curing agent, ortho-cresol phenolic epoxy resin-bisphenol A (EOCN-BPA), prepared through the addition reaction of o-methyl phenolic epoxy resin with BPA.

5、Para‐Toluenesulfonyl Isocyanate‐Ethylenediamine Adduct as a Thermal

This study introduced a sulfonyl urea-functionalized thermal latent curing agent for epoxy resins and explored the effects of urea-based latency and sulfonyl-mediated reversibility on curing behavior and final thermomechanical properties.

Research progress of medium temperature latent curing agent

The application and modification progress of several kinds of medium temperature latent curing agents such as dicyandiamide,imidazole,acid anhydride and microcapsules in epoxy resin system were reviewed,and the future research directions of such curing systems were prospected.

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.

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.

Thioester

Our experiments showed that thioester-based epoxies cured differently than those with thiol, leading to addressing challenges in the curing process. We also analyzed thermomechanical properties by varying the ratios of curing agents and fillers.

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.

In the field of modern materials science, epoxy resins are renowned for their excellent mechanical properties, chemical stability, and electrical insulation. to fully leverage these characteristics, epoxy resins must undergo proper curing treatment. The curing process involves a physical transformation of epoxy resins from a liquid to a solid state, which not only affects the final performance of the material but also impacts costs, production efficiency, and environmental friendliness. In this context, mid-temperature latent curing agents play a crucial role.

Mid-temperature latent curing agents are chemical substances used to cure epoxy resins, capable of promoting the curing reaction at relatively low temperatures. Compared to high-temperature curing, mid-temperature curing offers higher efficiency and lower environmental impact. In traditional high-temperature curing processes, epoxy resins require prolonged heating at elevated temperatures, leading to increased energy consumption and potential thermal stress issues in the cured material. In contrast, mid-temperature latent curing agents achieve comparable curing effects at lower temperatures, reducing energy consumption and minimizing environmental burdens.

The mechanism of mid-temperature latent curing agents primarily relies on their ability to provide sufficient energy to initiate or accelerate the curing reaction of epoxy resins. This energy typically originates from reactive groups within the curing agent, which chemically react with the epoxide groups in the epoxy resin to form stable cross-linked structures. During this process, mid-temperature latent curing agents not only accelerate the curing rate but also enhance the mechanical properties and chemical resistance of the material.

The selection and application of mid-temperature latent curing agents require consideration of multiple factors. First, the type of curing agent directly affects its performance. Different latent curing agents have varying chemical structures and activation energies, necessitating the choice of appropriate curing agents based on specific application scenarios. Second, compatibility between the curing agent and epoxy resin is critical. Incompatibility may lead to curing failures or undesirable physical properties. Additionally, the dosage of the curing agent must be precisely controlled, as excessive or insufficient amounts can compromise curing outcomes.

Practical applications of mid-temperature latent curing agents are widespread. For example, in the electronics packaging industry, epoxy resins are commonly used to manufacture circuit boards and chip encapsulation materials. In such applications, mid-temperature latent curing agents ensure rapid curing of epoxy resins at lower temperatures while maintaining good electrical and mechanical properties. In construction, epoxy resins are often employed for reinforcing and repairing concrete structures, where mid-temperature latent curing agents effectively improve durability and load-bearing capacity.

Beyond these fields, mid-temperature latent curing agents are extensively used in aerospace, automotive manufacturing, medical devices, and other high-tech sectors. In these industries, high-performance materials are essential for ensuring product safety and reliability. By utilizing mid-temperature latent curing agents, the performance of epoxy resins can be significantly enhanced to meet stringent requirements.

Despite the significant progress achieved in applying mid-temperature latent curing agents to epoxy resin curing, challenges remain. These include further improving curing agent efficiency to reduce energy consumption, optimizing compatibility between curing agents and epoxy resins to avoid poor physical properties, and expanding the variety and performance of curing agents to accommodate diverse application needs. In the future, with advancements in materials science and technology, mid-temperature latent curing agents are expected to play an even greater role in the field of epoxy resin curing.

As a critical component of the epoxy resin curing process, mid-temperature latent curing agents are instrumental in enhancing material performance, reducing costs, and protecting the environment. By deepening our understanding of their mechanisms, optimizing formulations, and refining application practices, we can better leverage this technology to advance materials science and meet growing industrial demands.