1、Latent curing epoxy systems with reduced curing temperature and

Unlike multicomponent epoxy systems, curing agents used in single component epoxy adhesives are usually latent curing agents, such as dicyandiamide, organic hydrazine, and imidazole [[8], [9], [10], [11]].

2、Epoxy Curing Agents

Aliphatic amines find use in civil engineering (e.g., patch repair systems, flooring), high-solids coatings, adhesives, wet lay-up laminating, small electrical encapsulation and are used to accelerate other amine curing agents.

3、Curing Agent: Types & Process of Curing Agents for Epoxy Resin

Explore the main types of curing agents & various crosslinking methods which help to improve the polymerization process to select the right curing agent for coating formulation.

4、Research Progress in Waterborne Epoxy Curing Agent

This paper introduces the types of waterborne epoxy curing agents and the preparation and development of ionic and nonionic waterborne epoxy curing agents. The modification of waterborne epoxy curing agents in recent years are reviewed.

5、Types and Functions of Waterborne Epoxy Curing Agents

Waterborne epoxy curing agents can be categorized based on their chemical properties into several types, including aliphatic amine-based, cycloaliphatic amine-based, aromatic amine-based, and imidazole-based curing agents.

Exploring the use of 2

A wide range of curing agents are available for waterborne epoxy systems, including polyamines, polyamides, anhydrides, and catalytic curing agents like imidazoles.

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.

Stable waterborne epoxy resins: Impact of toughening agents on coating

The subsequent discussion focuses on the dynamic mechanical properties of the waterborne epoxy cured films and the low-temperature film-forming capabilities of the waterborne epoxy varnishes; it is concluded with an assessment of the application performance of the waterborne epoxy metal primers.

Thermal curing of epoxy resins at lower temperature using 4

In this study, we present N -methyl- N -pyridyl amide derivatives as thermal latent curing agents for use at lower temperatures, along with their mechanism of epoxy curing through the generation of the highly reactive 4- (methylamino)pyridine (4MAPy) (Figure 1).

Latent Waterborne Epoxy Curing Agents

Latent waterborne epoxy curing agents are curing agents used in epoxy resin systems that can initiate curing reactions without direct contact with water. These curing agents typically exist in liquid or gel forms, capable of rapid curing at room temperature.

In modern industry, epoxy resins are widely used in coatings, adhesives, composite materials, and other fields due to their excellent physical and chemical properties. Among these, waterborne epoxy materials have attracted significant attention because of their environmentally friendly characteristics. The curing process of waterborne epoxy, especially latent curing, is a critical step in realizing its performance. understanding the types and applications of latent curing agents for waterborne epoxy is of great significance for advancing the development of such materials.

1. Waterborne Epoxy and Its Curing Principle

Waterborne epoxy refers to epoxy resin systems that use water as a solvent or dispersion medium. Compared to traditional solvent-based epoxy systems, waterborne epoxy has lower volatile organic compound (VOC) emissions and is more environmentally friendly. The curing process of waterborne epoxy typically employs latent curing, where the active groups in the epoxy resin gradually react with the curing agent under specific conditions, forming a stable cross-linked network. This results in the material acquiring the desired mechanical strength and chemical resistance.

2. Types of Latent Curing Agents for Waterborne Epoxy

Latent curing agents for waterborne epoxy mainly include the following categories:

1. Amine Curing Agents: Such as imidazole, triethylenetetramine, etc. These provide an alkaline environment to promote the curing reaction of epoxy resins.
2. Anhydride Curing Agents: Such as phthalic anhydride, maleic anhydride, etc. These compounds react with hydroxyl groups in epoxy resins, accelerating the curing process.
3. Ester Curing Agents: Such as acrylates, methacrylates, etc. These curing agents achieve solidification by undergoing addition polymerization reactions with epoxy groups in the resin.
4. Phenolic Resin Curing Agents: Such as phenolic resins, phenolic condensation products, etc. These react with phenolic hydroxyl groups in epoxy resins to form stable cross-linked structures.
5. Multi-functional Curing Agents: Such as difunctional or trifunctional curing agents. These provide multiple reactive sites, improving curing speed and mechanical properties of the material.

3. Applications of Latent Curing Agents for Waterborne Epoxy

Latent curing agents play a crucial role in practical applications, mainly reflected in the following aspects:

1. Improving Curing Efficiency: Selecting appropriate curing agents can significantly accelerate the curing speed of waterborne epoxy materials, shortening production cycles.
2. Optimizing Material Performance: Different curing agents have distinct chemical properties and reaction characteristics. The most suitable curing agent can be chosen to meet specific performance requirements.
3. Reducing Environmental Impact: Waterborne epoxy materials inherently have lower VOC emissions compared to traditional solvent-based epoxies. The use of latent curing agents further minimizes environmental impact.
4. Enhancing Material Adaptability: By adjusting the type and dosage of curing agents, waterborne epoxy materials can adapt to a wider range of temperature and humidity conditions, expanding their application scope.

4. Future Development Trends of Latent Curing Agents for Waterborne Epoxy

With advancements in technology and increasing environmental regulations, research and application of latent curing agents for waterborne epoxy are evolving in the following directions:

1. Development of Green Curing Agents: Future efforts will focus on creating low-toxicity, low-residue eco-friendly curing agents to comply with global environmental regulations.
2. Intelligent Curing Control Technologies: Leveraging sensors, smart control systems, and other advanced technologies to precisely control the curing process, enhancing production efficiency and product quality.
3. Research and Development of Multi-functional Curing Agents: Future curing agents will not only act as chemical catalysts but also integrate multiple functions to meet complex application scenarios.

Latent curing agents are a key factor driving the development of waterborne epoxy materials. Through in-depth understanding and application of different types of curing agents, we can fully leverage the advantages of waterborne epoxy materials to meet growing industrial demands. Meanwhile, we must prioritize environmental trends, developing greener and more sustainable curing agent products to contribute to a better future.