1、Curing reactions of epoxy powder coatings in perspectives of chemical

This review discusses the types, reaction principles, characteristics of curing agents and accelerators that participate in the curing reaction with different epoxy resins.

2、A kind of piperazine epoxy resin curing agent and its prepared epoxy

The only curing agent that can maintain a fast curing rate at extremely low temperatures is polythiol curing agent, but mercaptan curing agent has a strong pungent odor, is expensive, has limited application range, and is difficult to carry out large-scale construction

3、Rigid epoxy networks with very high intrinsic fracture toughness using

In this study, brittle crosslinked epoxy networks are significantly toughened through in-situ polymerization of epoxy using piperazine, which reacts at moderately low temperatures in a catalyst-free one-pot method.

4、ANCAMINE® AEP

Ancamine® AEP curing agent is a 96% minimum purity grade of N-aminoethyl-piperazine, designed for use as a curing agent for liquid epoxy resins.

5、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.

Preparation of Poly (phosphoric acid piperazine) and Its Application as

Its chemical structure was well characterized by Fourier transform infrared (FTIR) spectroscopy, 13 C and 31 P solid-state nuclear magnetic resonance measurements. The synthesized PPAP and curing agent m -phenylenediamine were blended into epoxy resin (EP) to prepare flame retardant EP thermosets.

Piperazine epoxy resin curing agent, epoxy resin composition prepared

The invention provides a piperazine epoxy resin curing agent, an epoxy resin composition prepared therewith, and applications, wherein the raw materials of the curing agent include polyfunctionality glycidyl ether, an alcohol solvent, and anhydrous piperazine.

The epoxy resin system: function and role of curing agents

Epoxy resins are frequently used in electrical devices, castings, packaging, adhesive, corrosion resistance, and dip coating. In the presence of curing agents, epoxy resins become rigid and infusible. Eco-friendliness and mechanical functionality have emerged as vulcanization properties.

Bio

Improving the toughness of epoxy resin (EP) while maintaining its strength is still considered a huge challenge. Herein, a novel bio-based curing agent, PA–DAD, has successfully been developed for EP that provides both mechanical reinforcement and flame retardancy.

Investigation of curing systems in modified epoxy anticorrosion

This study elucidated the mechanism by which the molecular structure of the curing agent influenced the anti-corrosion performance of epoxy coatings, further improving the research method for studying the constitutive effects of the curing agent system in simulation work on anti-corrosive coatings, and providing effective guidance for screening ...

In modern materials science and chemical engineering, epoxy resins, as a class of high-performance thermosetting materials, are widely used in electronics, automotive, construction, and other fields due to their excellent physical and chemical properties. Among them, piperazine epoxy addition curing agents, as critical catalysts in the curing reactions of epoxy resins, directly influence the quality and performance of the final products. This article aims to explore the fundamental concepts, classifications, applications, and research progress of piperazine epoxy addition curing agents, providing readers with a comprehensive understanding.

I. Basic Concepts of Piperazine Epoxy Addition Curing Agents

Piperazine epoxy addition curing agents are organic compounds primarily used to promote the curing process of epoxy resins. They react chemically with the epoxide groups in epoxy resins, forming stable cross-linked networks that impart superior mechanical properties, chemical resistance, and thermal stability to the epoxy materials.

II. Classification of Piperazine Epoxy Addition Curing Agents

Based on their structure and properties, piperazine epoxy addition curing agents can be categorized into several types:

1. Primary Amine Piperazines: These molecules contain one or more primary amine groups, enabling nucleophilic substitution reactions with epoxide groups in epoxy resins, thereby promoting curing.
2. Polyamine Piperazines: Featuring multiple primary amine groups, these molecules exhibit higher catalytic activity, accelerating the curing rate of epoxy resins.
3. Quaternary Ammonium Salt Piperazines: These molecules contain one or more quaternary ammonium salt groups, which possess strong ionization capabilities. They form ionic bonds with epoxide groups, enhancing curing efficiency.
4. Amide Piperazines: These molecules include one or more amide groups, which undergo acylation reactions with epoxide groups, facilitating curing.

III. Applications of Piperazine Epoxy Addition Curing Agents

Piperazine epoxy addition curing agents are extensively used in epoxy resin applications, including:

1. Coatings and Adhesives: They are employed in high-performance coatings (e.g., anti-corrosion coatings) and adhesives (e.g., high-temperature-resistant adhesives), offering优异的mechanical properties and durability.
2. Electronic Encapsulation Materials: In electronic packaging, they are used to fabricate materials such as chip encapsulants and circuit board adhesives, delivering exceptional electrical and mechanical properties.
3. Composites: When combined with other resins, they enable the production of composites like carbon fiber-reinforced plastics and glass fiber-reinforced plastics, characterized by superior mechanical strength and heat resistance.
4. Medical Devices: They are utilized in high-performance medical devices (e.g., surgical instruments, orthodontic appliances) due to their excellent biocompatibility and mechanical properties.

IV. Research Progress in Piperazine Epoxy Addition Curing Agents

Recent advancements in piperazine epoxy addition curing agents include:

1. Synthesis of Novel Piperazine Derivatives: Researchers have designed new piperazine derivatives with varying catalytic activities by modifying the piperazine structure to meet diverse application needs.
2. Modification of Piperazine Curing Agents: Functional group modifications to piperazine molecules enhance their catalytic activity and selectivity, improving curing speed and product quality.
3. Synergistic Effects: Combining piperazine with other catalysts or additives has been shown to produce synergistic effects, boosting curing efficiency and performance.
4. Environmental Friendliness: Efforts to develop environmentally friendly piperazine curing agents aim to improve recyclability and reduce environmental pollution.

As critical catalysts in the curing of epoxy resins, piperazine epoxy addition curing agents play a vital role in material performance. Through ongoing research and application, high-performance epoxy materials can be engineered to meet industrial and technological demands. In the future, advancements in research and technology will further expand the applications and development potential of piperazine epoxy addition curing agents.