1、环氧树脂固化剂的常见类型及其固化机理

环氧树脂固化剂的常见类型及其固化机理 本文简要概述了环氧树脂固化剂的常见类型及其固化机理。 包括脂肪族二胺和多胺、芳香族多胺、其他含氮化合物和改性脂肪族胺。 伯胺和仲胺对环氧树脂的固化作用是通过氮原子上的活性氢打开环氧基团，使其交联 ...

2、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.

3、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.

Effects of Curing Agents on the Adhesion of Epoxy Resin to Copper: A

Although the adhesion of epoxy resins has been extensively studied using density functional theory (DFT) calculations, few studies have evaluated the effect of hardener molecules.

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...

Epoxy Resin Adhesives

There are various types of epoxy resin curing agents, and the curing conditions and working life are determined depending on the type and amount used.

211005_WP_Epoxy Curing Agents _en_Freigabe.indd

Epoxy adhesives can be used as one-component or two-component systems and can be cured in hot conditions or at room temperature, depending on the design. There are variety of possible application forms, such as pastes, films, solids, aqueous dispersions, liquids or solvent-based adhesive systems.

A critical review of dynamic bonds containing curing agents for epoxy

Investigated the mechanical, thermomechanical, thermal, and recycling properties of the epoxy thermosets cured by developed curing agents. Addressed the challenges, opportunities and emerging trends in the field.

Chapter Epoxy Adhesives

two-component package. One-component epoxy adhesives are prepared and supplied by mixing all formulated components in advance including epoxy resin and curing agent. One-component epoxy adhesives usually need cure at elevated temperature and store at low temperature in a refri

Epoxy Curing Agents: A Comprehensive Understanding of Their

Explore the basic knowledge of epoxy curing agents, including their classification, working principle, wide application in construction, electronics, automotive and other industries, as well as market trends and the latest developments of environmentally friendly products.

Adhesive Epoxy Resin Curing Agents

In modern industrial and construction fields, epoxy resins have become the preferred adhesive material due to their excellent mechanical properties, chemical stability, and electrical insulation. the curing of epoxy resins is a complex chemical reaction process that requires specific curing agents to facilitate. The interaction between curing agents and epoxy resins is critical to ensuring the final bonding strength. This article explores the importance, types, applications, and key considerations in selecting and using adhesive epoxy resin curing agents.

Importance

The curing process of epoxy resins typically involves the following steps: first, mixing the epoxy resin with a curing agent; second, initiating a polymerization reaction of monomers in the mixture under the action of the curing agent; and finally, forming a three-dimensional network polymer structure. This process not only determines the final properties of the epoxy resin but also directly impacts the durability and reliability of the bonded components. selecting the appropriate curing agent is crucial to ensuring optimal adhesive performance.

Types

Epoxy resin curing agents can be classified into the following categories:

1. Aliphatic Amine Curing Agents: Examples include Dimethylaminopyridine (DMAP) and Diethylaminopyridine (DEAP), which effectively accelerate the curing process.
2. Aromatic Amine Curing Agents: Such as Para-phenylenediamine (PDA) and Meta-phenylenediamine (MDA), known for better thermal stability and chemical resistance.
3. Imidazoline Curing Agents: Including 4,4'-Diaminodiphenylmethane (DDM) and 4,4'-Diaminodiphenylether (DPE), which provide excellent mechanical properties and electrical insulation.
4. Anhydride Curing Agents: Examples are Phthalic Anhydride (PMDA) and Trimellitic Anhydride (TMQ), suitable for high-temperature curing applications.
5. Phenolic Resin Curing Agents: Such as phenolic resins and phenolic epoxies, offering good temperature resistance and corrosion resistance.
6. Silane Curing Agents: For instance, 3-Glycidoxypropyltrimethoxysilane (GPTMS), commonly used to enhance sealing performance.
7. Other Specialty Curing Agents: Polyamide and polyurea curing agents, among others, tailored for specific applications.

Applications

Different types of curing agents suit distinct epoxy systems and application environments. For example, aromatic amine curing agents are ideal for scenarios requiring high heat resistance and chemical resistance, while aliphatic amines are better suited for rapid-curing applications. When selecting a curing agent, factors such as the type of epoxy resin, expected curing conditions, and the service environment of the bonded components must be considered.

Usage Considerations

Before using epoxy resins and curing agents, it is essential to thoroughly understand their characteristics, compatibility, and follow proper procedures. Key recommendations include:

1. Mixing Ratios: Follow manufacturer guidelines to ensure complete dissolution of the curing agent in the epoxy resin.
2. Temperature Control: Some curing agents perform optimally at lower temperatures, so monitor curing conditions carefully.
3. Time Management: Cure time depends on temperature and curing agent type; adhere strictly to specified durations.
4. Surface Cleanliness: Bonded surfaces must be free of oils, moisture, or contaminants to ensure effective adhesion.
5. Environmental Factors: Avoid high humidity or temperature fluctuations during application, as these may affect cure speed and bond quality.

The selection and use of adhesive epoxy resin curing agents are critical to achieving high-quality bonds and performance. By understanding the characteristics of different curing agents and tailoring choices to specific application requirements, adhesive effectiveness can be significantly improved, meeting the demands of various industrial and construction needs.