1、Research on the Synthesis and Properties of Polyamide

Subsequently，the polyamide waterborne epoxy curing agent（MK-165）was synthesized from JXA-4D，a composite polyamine，epoxy resin（NPEL-128）， and polyethylene glycol diglycidyl ether（PEGDGE）.

2、Bio

Herein, A bio-based curing agent, PA–DAD, was synthesized using a simple neutralization process taking place between PA and DAD to create an ionic cross-link network in an EP matrix.

3、Journal of Applied Polymer Science

In this study, two different curing agents with six amine functional groups each were synthesized via a two-step reaction. In the first step, isophorone diamine (IPDI) was reacted with two equivalents of pentaerythritol triacrylate (PETA).

4、EPOXY CURING AGENTS, COMPOSITIONS AND USES THEREOF

It is an object of the present invention to provide a novel, low VOC, waterborne curing agent for use with epoxy resin compositions, which overcomes these problems.

Synthesis of polyfunctional amines as curing agents and its effect on

In this study, two different curing agents with six amine functional groups each were synthesized via a two‐step reaction. In the first step, isophorone diamine (IPDI) was reacted with two...

Synthesis and Property Analysis of a Novel Epoxy Composite Curing Agent

In this study, a novel low-temperature fast-curing EP agent was synthesized based on Mannich’s reaction with thiourea, polyamine, formaldehyde, phenol and benzyl alcohol.

Synthesis of polyfunctional amines as curing agents and its effect on

We investigated the effects of the curing agents on the mechanical properties of epoxy, including tensile strength, flexural strength, and impact strength.

Thiourea modified low molecular polyamide as a novel room temperature

A thiourea modified low molecular weight polyamide (TLMPA) as a room temperature curing agent was synthesized by a two-step method.

Synthesis and application of epoxy resins: A review

The final properties of cured epoxy resins are affected by the type of epoxy resin, curing agent, and curing process. This paper aims to review the synthesis, curing process, and application of epoxy resins.

Properties and curing kinetics of C21

Three C21-based reactive polyamides with various amine values as epoxy-curing agents were synthesized from tung oil and different polyamines.

Abstract: Polyamide epoxy curing agents are critical organic compounds widely utilized in coatings, adhesives, sealing materials, and other fields. This paper primarily introduces the synthesis methods of polyamide epoxy curing agents, including raw material selection, chemical reaction processes, structural and performance analysis of the products, and practical application cases.

1. Introduction Polyamide epoxy curing agents are high-performance polymer materials with molecular structures containing amide groups and epoxy groups. These functional groups enable stable cross-linking networks with various resins, significantly enhancing mechanical properties, chemical resistance, and aging resistance. studying the synthesis of polyamide epoxy curing agents is of great significance for advancing related fields.

2. Raw Material Selection

1. Polyamide Monomers: Common monomers include nylon 6, nylon 1010, etc., which can be polymerized to produce polyamides with varying molecular weights.
2. Epoxy Compounds: Essential components such as bisphenol A epoxy resin and alicyclic epoxy resin are frequently used.
3. Catalysts: Titanates, aluminates, and other catalysts accelerate reactions, improving yield and product quality.
4. Diluents: Solvents like toluene and xylene adjust reactant concentrations to prevent gelation or precipitation during polymerization.

3. Chemical Reaction Process

1. Polymerization: Polyamide monomers and epoxy compounds are mixed at specific ratios and reacted under controlled temperatures. Amino groups in the polyamides condense with epoxy groups, forming polyamide-epoxy polymers.
2. Catalyst Activation: Catalysts promote reaction efficiency and product yield.
3. Washing and Drying: Post-reaction purification removes unreacted monomers, catalysts, and solvents, yielding purified products.

4. Structural and Performance Analysis

1. Structural Analysis: FTIR and NMR confirm the product’s structure, revealing interconnected amide and epoxy groups forming a three-dimensional network that enhances mechanical strength and chemical resistance.
2. Performance Testing: Tensile strength, flexural strength, and impact toughness tests demonstrate excellent mechanical and thermal stability. Additionally, the products exhibit superior resistance to water, oils, acids, and bases.

5. Practical Application Cases

1. Coatings Industry: As curing agents, polyamide-epoxy compounds improve coating adhesion, wear resistance, and corrosion resistance. For example, a coating formulated with this agent maintained integrity after 10 years of outdoor exposure without cracks.
2. Adhesive Industry: High-performance adhesives using these curing agents show enhanced bonding strength and temperature resistance. An electronics company’s adhesive retained bonding integrity under high-temperature conditions.
3. Sealing Materials: These curing agents improve sealing material durability and pressure resistance. A construction sealant incorporating them remained leak-free and effective over long-term use.

Polyamide epoxy curing agents exhibit outstanding performance and broad application potential. current research remains preliminary, necessitating further optimization of synthesis processes to enhance performance and reduce costs. With technological advancements, these agents are poised to play a larger role in future developments.