1、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.

2、Preparation, curing kinetics, and properties of a novel low

The major objective of this work is to develop and systematically study a novel nonlinear starlike aliphatic-polyamine curing agent for epoxy resins, N,N,N′,N′,N′′-penta (3-aminopropyl)-diethylenetriamine (PADT), which quite differs in the molecular topology from common linear aliphatic-amine curing agents.

3、Branched 1,6

Aliphatic diamines and polyamines are long used as important curing agents for epoxy resins, especially in room-temperature-cure epoxy coatings and adhesives due to their high reactivity and low cost.

Epoxy

The curing agents sold under the Baxxodur® trademark, such as polyether amines, aliphatic and cycloaliphatic amines, differ in molecular structure, basicity and number of functional groups.

CURING AGENT FOR EPOXY RESINS, COMPOSITIONS COMPRISING SAID AGENT AND

Epoxy resins can be cured (hardened) by chemical reaction of epoxy groups with reactive groups of a curing agent (e.g. amino groups). Curing converts epoxy resins with a relatively low molecular weight, into materials with a relatively high molecular weight by chemical addition of curing compounds.

A phosphorus

Herein, a P-modified aliphatic amine curing agent (DPT) was synthesized and applied to enhance the flame retardancy and smoke suppression of EP/aliphatic amine systems. The impacts of DPT on the curing behaviors, thermal properties and flame retardancy of the systems were studied in detail.

Curing agents for epoxy resins

Q-RIT curing agents are hardeners for epoxy resins. These are modified amines, cycloaliphatic amines, polyamides, waterborne hardeners or specialties.

Aliphatic Amines in Epoxy Curing: Speed, Strength & Recyclability

Aliphatic amines are primarily used as curing agents in epoxy systems to facilitate quick and efficient chemical reactions, forming stronger and heat-resistant bonds within the material.

The study of the curing mechanism, kinetic and

Curing reaction kinetics information exerts a vital role in designing the detailed formulations for epoxy resin curing system and optimizing its curing processes (Table 4).

Aliphatic Diamide as Novel Asphalt‐Modified Epoxy Curing Agent for

In this study, aliphatic diamide based on adipic acid is synthesized by esterification and ammonolysis, which is used as the curing agent of epoxy resin.

Aliphatic Curing Agents for Epoxy Resins

Epoxy resin, as a high-performance thermosetting polymer, is widely utilized in fields such as electronics, aviation, automotive, construction, and industry due to its excellent mechanical properties, electrical insulation, and corrosion resistance. The selection of an appropriate curing agent is critical during the curing process of epoxy resin. The curing agent not only affects physical properties like curing speed, hardness, and toughness but may also impact the chemical stability and durability of the final product. research and application of aliphatic curing agents for epoxy resins hold significant practical importance. This paper explores the classification, characteristics, and practical applications of aliphatic curing agents for epoxy resins.

1. Classification of Aliphatic Curing Agents for Epoxy Resins

Aliphatic curing agents for epoxy resins primarily include aliphatic amines, acid anhydrides, aromatic amines, and others. These curing agents react with epoxy resin to form thermosetting resins, enabling material solidification.

1. Aliphatic Amine Curing Agents: Aliphatic amine curing agents are among the most common types, including cycloaliphatic and linear aliphatic subcategories. Cycloaliphatic aliphatic amines, such as N,N-dimethylaniline and N,N-diethylaniline, exhibit good solubility and reactivity. Linear aliphatic amines, such as diisopropylamine and diphenylamine, offer higher reactivity and faster curing rates. The resins formed by these curing agents with epoxy resin feature high crosslinking density and superior mechanical properties.

2. Acid Anhydride Curing Agents: Acid anhydrides are another frequently used class of epoxy curing agents. The resins formed via their reaction with epoxy resin exhibit high crosslinking density and excellent mechanical properties. Common acid anhydride curing agents include phthalic anhydride and pyromellitic dianhydride.

3. Aromatic Amine Curing Agents: Aromatic amine curing agents react with epoxy resin to produce resins with high crosslinking density and good mechanical properties. Examples include para-phenylenediamine and meta-phenylenediamine.

4. Other Curing Agents: In addition to the above, other curing agents such as triazine-based and heterocyclic compounds exist. These agents impart unique performance characteristics to the resin, suitable for specific applications.

2. Characteristics of Aliphatic Curing Agents for Epoxy Resins

1. Reactivity: The reactivity of aliphatic curing agents directly influences curing speed and efficiency. Higher reactivity typically accelerates curing but may lead to incomplete curing or void formation. Thus, curing agent selection must balance reactivity with application-specific needs.

2. Crosslinking Density: Crosslinking density refers to the extent of molecular chain interconnections in cured resins. Higher density enhances mechanical strength and heat resistance but may cause brittleness. Balancing density is essential to retain flexibility and impact resistance.

3. Chemical Stability: Aliphatic curing agents should maintain chemical stability under diverse environmental conditions. For example, moisture-resistant formulations require corrosion protection, while high-temperature applications demand thermal stability.

4. Environmental Friendliness: With growing environmental awareness, eco-friendly curing agents are preferred. Aliphatic curing agents should minimize toxicity and emissions.

3. Applications of Aliphatic Curing Agents for Epoxy Resins

Aliphatic curing agents for epoxy resins find broad use across industries. In electronic packaging, they bond components to enhance reliability; in aerospace, they fabricate high-performance composites; in automotive manufacturing, they bond vehicle parts for safety; and in construction, they improve material longevity and aesthetics.

Aliphatic curing agents are indispensable in epoxy resin curing processes. By selecting appropriate curing agents, epoxy materials with exceptional properties can be tailored to diverse applications. in-depth research on the types, characteristics, and practical significance of aliphatic curing agents is crucial.