1、Water absorption and property evolution of epoxy resin under

Changes in structure and properties of resin matrix caused by water absorption is one of the key factors affecting the long-term durability of fiber reinforced polymer composites used in civil engineering.

2、Slow Curing of Epoxy Resin Underwater at High Temperatures

Given the very long gelation time at high temperatures underwater and the good mechanical properties, such epoxy resin may find applications in water shut-off in the upstream of oil and gas industry, where water management underground is highly desired.

3、Study on the Effect of Absorbing Moisture of Anhydride Curing Agent on

Anhydride curing agent is one of the most commonly used curing agents for the preparation of epoxy resin insulation materials, but it is easy to absorb external

4、Preliminary Results on Preparation and Performance of a Self

Water-based epoxy resin and water-based epoxy curing agent were the two essential components of a water-based epoxy system. The ultimate performance of the cured film was determined...

Self

Self-curing waterborne epoxy coatings represent an innovative advancement in coating technology, combining environmental friendliness with high performance. This chapter explores their unique chemistry, which enables self-curing through water evaporation, eliminating the need for manual mixing.

Preliminary Results on Preparation and Performance of a Self

In this article, PEG1000 was utilized to construct self-emulsifying EP1K system, and then PEG1K was added to MXDA which converted poisonous MXDA into a non-toxic water-based epoxy curing agent. Moreover, the curing agent also had a good self-emulsifying function.

Water in Epoxy Coatings: Basic Principles of Interaction with

A critical analysis of the experimental methods is provided, including advantages and possible experimental errors. The methods used for processing experimental data are discussed as well as the effect of water on the exploitation properties and life cycle of epoxy coatings.

Effect of curing agent polarity on water absorption and free volume in

In this paper, the effects of the polarities of curing agents on the water absorption and the microstructure have been studied for epoxy resins DER331 (E51) cured with three different amine curing agents DDS, DDM, and MOCA by PALS, gravimetric measurements and Differential Scanning Calorimetry (DSC), respectively.

Fabrication of a nonionic self

Waterborne epoxy curing agent plays a key part in the waterborne epoxy resin coatings, directly affecting the physical and chemical properties of the coating film.

Self

Waterborne epoxy resin is a two-phase system with water as the continuous phase, dissolved hardener, and epoxy resin emulsion droplets as the dispersed phase. Waterborne coatings form by coalescing emulsion droplets, allowing hardener molecules to penetrate and react with resin.

In the realm of modern materials science, epoxy curing agents—a critical component of epoxy resin systems—play a pivotal role in determining the physical and chemical properties of final products. Among these properties, low water absorption is a key indicator, directly impacting the material’s waterproof and moisture-resistant capabilities, as well as its stability under extreme environmental conditions. This article explores the preparation, applications, and performance implications of low water absorption epoxy curing agents.

1. Preparation Principles of Low Water Absorption Epoxy Curing Agents

The synthesis of low water absorption epoxy curing agents hinges on targeted molecular structure design. By incorporating hydrophilic groups such as polyethers or alcohols, the affinity between the curing agent and water is reduced, thereby minimizing water uptake during curing. Additionally, nanotechnology-enabled surface modifications can enhance hydrophobicity, further lowering the water absorption rate.

2. Applications of Low Water Absorption Epoxy Curing Agents

Owing to their superior waterproof properties, these curing agents are widely used in construction, automotive, and electronics industries. For instance:

• Construction: In waterproof coatings, they prevent wall penetration by water, extending building lifespan.
• Automotive: Applied in interior coatings, they mitigate humidity-induced discomfort within vehicles.
• Electronics: Used to protect circuit boards from short circuits caused by humidity fluctuations.

3. Impact on Epoxy System Performance

Low water absorption curing agents significantly improve epoxy system performance:

• Water Resistance: Enhances durability in prolonged water exposure or humid environments.
• Adhesion: Reduces moisture-induced disruptions in resin-filler bonding, boosting coating adhesion.
• Flexibility: Improves the system’s tensile strength, preventing brittle fracture under mechanical stress.

4. Development Trends for Low Water Absorption Epoxy Curing Agents

Advancements in this field focus on:

• Developing novel curing agents with broader performance profiles.
• Optimizing formulations for diverse applications.
• Exploring eco-friendly synthesis methods to minimize environmental impact.
• Leveraging emerging materials like graphene and carbon nanotubes (CNTs) to further enhance properties and expand application scope.

As integral components of epoxy systems, low water absorption curing agents directly influence material longevity and performance. Through rigorous research and technological innovation, developing curing agents with even lower water absorption rates could revolutionize materials science, addressing society’s demand for high-performance materials. Looking ahead, continued advancements will likely unlock new potentials for these agents across various industries.