1、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.
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、Common types of epoxy resin curing agent and its curing mechanism
Latent curing agent can be mixed with epoxy resin to make a liquid type compound, simplify the application of epoxy resin products, its application range from a single package adhesive to coatings, impregnating paint, potting compounds, powder coatings and other aspects of development.
epoxy resin types and their curing agents
Comprehensive overview of epoxy resin types and curing agents, featuring detailed information about their applications, advantages, and customization options for industrial and commercial use.
Epoxy Curing Agents: Definition, Types, Characteristics, and Industrial
The curing agent (Curing agent), also known as the hardening agent (Hardene agent), is an indispensable curing reaction agent for thermosetting resins. The combination of different varieties of resin and curing agent can form cured products with different application methods and different properties, which is a major feature of epoxy resin ...
Comparing and Contrasting Epoxy Resin Curing Agents A Comprehensive Guide
In this blog post, we will compare and contrast different types of epoxy curing agents, including epoxy resin hardeners, modified cycloaliphatic amine epoxy hardeners, high functional curing agents, and high-performance hardeners.
Types of epoxy resin curing agent
Basic curing agent WTF: including aliphatic diamines and polyamines, aromatic polyamines, other nitrogen-containing compounds and modified fatty amines. Acidic curing agent: including organic acids, acid anhydrides, and boron trifluoride and its complexes.
Several Kinds of Commonly Used Epoxy Resin Curing Agents
The number of epoxy resin curing agents is divided into the explicit curing agent and the latent curing agent. Here are some types of curing agents.
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，使其交联固化。 脂肪族多胺如乙二胺、己二胺、二乙烯三胺、三乙烯四胺、二乙胺基丙胺等活性较高，可使环氧树脂在室温下交联固化；而芳香族多胺活性较低，如间苯二胺，可在 150℃下固化。 2、酸性固化剂。 包括有机酸、酸酐、三氟化硼及其络合物。 二元酸及其酸酐如顺丁烯二酸酐、邻苯二甲酸酐可以固化环氧树脂，但必须在较高温度下烘烤才能完全固化。 酸酐首先与环氧树脂中的羟基反应生成单酯，单酯中的羧基与环氧基发生加成和酯化反应生成双酯。 3、加 …
The epoxy resin system: function and role of curing agents
Depending on their chemical composition, curing agents can be categorised as amine-type curing agents, alkali curing agents, anhydrides, or catalytic curing agents.
Epoxy resin is an important macromolecule material, widely used in aerospace, automobile manufacturing, construction, electronics and electrical appliances, etc. Its excellent performance comes from its unique chemical structure and chemical reactions during curing. In the curing process of epoxy resin, curing agents play a crucial role. They not only determine the curing speed and physical properties after curing, but also affect the temperature resistance, corrosion resistance, and electrical insulation of the material. understanding different types of curing agents and their characteristics is essential for the application of epoxy resin.
1. Amino-Type Curing Agents
Amino-type curing agents are the most commonly used type of epoxy resin curing agents. They include aliphatic amines (such as diethylamine, triethylamine), aromatic amines (such as dimethylaniline, diphenylamine), and alicyclic amines (such as piperidine, morpholine). These curing agents can react with the epoxy groups in epoxy resin through nucleophilic substitution, forming stable salt bonds to promote the curing of the resin.
Characteristics:
- Amino-type curing agents have good thermal stability and mechanical strength, suitable for applications with high requirements.
- They can adjust curing time and temperature to suit different curing conditions.
- amino-type curing agents usually have a strong刺激性气味, which has a certain impact on the environment and human health.
2. Anhydride-Type Curing Agents
Anhydride-type curing agents include phthalic anhydride, pyromellitic anhydride, etc. They achieve the curing of the resin by reacting with the epoxy groups in epoxy resin through an acylation reaction, forming stable ester bonds.
Characteristics:
- Anhydride-type curing agents have a high degree of crosslinking density, providing higher mechanical strength and heat resistance.
- The curing speed is fast, making them suitable for applications requiring rapid curing.
- anhydride-type curing agents have a high toxicity, requiring strict safety protection measures during use.
3. Imidazole-Type Curing Agents
Imidazole-type curing agents mainly include imidazolineones (such as imidazolineone, imidazolineone) and imidazolineureas (such as imidazolineurea, imidazolineurea). These curing agents form stable cyclic compounds through ring-opening addition reactions with the epoxy groups in epoxy resin.
Characteristics:
- Imidazole-type curing agents have good water resistance and chemical corrosion resistance, suitable for various harsh environments.
- The curing process is mild, making them suitable for scenarios where material protection is needed.
- the toxicity of imidazole-type curing agents is relatively low, but necessary protective measures are still recommended during operation.
4. Phenolic-Type Curing Agents
Phenolic-type curing agents include phenolic resins (such as phenolic resin, phenolic resin, etc.). These curing agents form stable polymer chains through condensation reactions with the epoxy groups in epoxy resin.
Characteristics:
- Phenolic-type curing agents have good heat resistance and electrical insulation, suitable for applications in high-temperature environments.
- The curing process is slow, making them suitable for scenarios requiring long curing times.
- the content of volatile organic compounds in phenolic-type curing agents is relatively high, having a certain impact on the environment and human health.
5. Other Types of Curing Agents
Besides the above common types of curing agents, there are some special curing agents such as silane-type curing agents (such as silane coupling agents, silane modifiers), borate ester-type curing agents (such as dicyandiamide borate), phosphate ester-type curing agents (such as phosphate ester, phosphate ester), etc. These curing agents have unique advantages in specific fields.
there are many types of epoxy resin curing agents, each with its unique advantages and disadvantages and applicable scenarios. When choosing curing agents, it is necessary to comprehensively consider actual application needs, cost budgets, and environmental protection requirements. With the development of new materials and technologies, more efficient and environmentally friendly new curing agents may emerge in the future, bringing greater breakthroughs to the application of epoxy resins.
