1、Curing reactions of epoxy powder coatings in perspectives of chemical
The properties of the cured products of epoxy powder coatings are dominated by the curing systems. This review discusses the types, reaction principles, characteristics of curing agents and accelerators that participate in the curing reaction with different epoxy resins.
2、Journal of Applied Polymer Science
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.
3、The epoxy resin system: function and role of curing agents
Curing agents are critical components of aqueous epoxy resin systems. Unfortunately, its uses and applications are restricted because of its low emulsifying yields. Epoxy resins are frequently used in electrical devices, castings, packaging, adhesive, corrosion resistance, and dip coating.
4、A latent curing agent for rapid curing of phenolic epoxy resin at low
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...
Advances in Phenolic Resin as a Curing Agent for Epoxy Resin, Part I
Phenolic resins are recognized as the most important curing agent for epoxy resin applied to the electric and electronic fields. Up to the present time, various types of phenolic resins have been developed in Japan and overseas.
New resveratrol based Mannich epoxy resin curing agent
This study focuses on the preparation of a phenolic amine bio-based epoxy curing agent (RFA) through a one-pot Mannich reaction involving resveratrol, followed by the curing of bisphenol A E51 epoxy resin.
Effect of Different Curing Agents on Cure Reaction and Exposure
Cure kinetics of phenolic-epoxy resin and several curing agents was investigated. The reaction rate, da/dt, is directly proportional to the heating rate: da/dt = 1/∆Ho × dH/dt.
11 EPOXY RESINS AND CURING AGENTS
Epoxy resins are converted to a thermoset state by chemical reaction between the resin and a curing agent. Depending on the curing agent this reaction can take place at elevated temperatures or at room temperature. The cured resins are not soluble in solvents and cannot be melted by heating.
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.
Study on the synergistic effect of novel phenolic curing agent
In this work, a novel phenolic curing agent based on phenylene ether (HPF) was prepared from resorcinol, formaldehyde and diphenyl ether, which could improve the toughness of AFG-90 H epoxy resin due to the phenylene ether.
In today's industrial manufacturing and construction sectors, epoxy resins are widely favored for their exceptional physical properties and chemical stability. Among these, phenolic epoxy resin curing agents, as a critical component in epoxy resin applications, directly influence the quality and performance of final products. This article explores the composition, characteristics, and practical significance of phenolic epoxy resin curing agents.
Composition of Phenolic Epoxy Resin Curing Agents
Phenolic epoxy resin curing agents primarily consist of phenolic compounds, epoxy resins, and curing accelerators. Phenolic compounds, often multi-functional phenols or phenolic resins, form the core of the curing agent. They react chemically with epoxy resins to create a stable three-dimensional network structure. The epoxy resin provides the foundational framework for the cured material, ensuring mechanical strength and chemical resistance. Curing accelerators expedite the curing process, enhancing production efficiency.
Characteristics of Phenolic Epoxy Resin Curing Agents
Phenolic epoxy resin curing agents exhibit the following key features:
- Excellent Adhesive Performance: Chemical bonding between phenolic compounds and epoxy resins results in superior mechanical properties and durability in cured materials.
- Outstanding Electrical Insulation: The inherent insulating properties of epoxy resins are further enhanced by the addition of phenolic compounds.
- Heat and Corrosion Resistance: Phenolic compounds inherently offer thermal stability and corrosion resistance, making these curing agents suitable for high-temperature and harsh environments.
- Ease of Processing: These curing agents are easy to mix and process, compatible with various molding techniques such as casting, spraying, and impregnation.
- Environmental Friendliness: Compared to traditional solvent-based curing agents, phenolic epoxy curing agents are free of volatile organic compounds (VOCs), minimizing environmental and health impacts.
Practical Significance of Phenolic Epoxy Resin Curing Agents
The application of phenolic epoxy resin curing agents has expanded across modern industries, particularly in aerospace, automotive manufacturing, and electronics. For instance:
- Aerospace: Used to fabricate high-performance composites requiring strength, rigidity, and fatigue resistance.
- Automotive Industry: Employed in manufacturing vehicle bodies, chassis, and critical components to enhance durability and safety.
- Electronics: Utilized in producing circuit boards, heat sinks, and casings to meet the demands for reliability and high performance.
As a vital component in epoxy resin applications, the performance of phenolic epoxy resin curing agents directly determines the quality and effectiveness of end products. By understanding their composition, characteristics, and industrial relevance, we can better recognize their role in advancing modern manufacturing and contributing to technological progress.
