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What are types of epoxy Diluents & Uses?

Epoxy Diluents

Epoxy diluents are low molecular weight compounds added to epoxy resins to modify their viscosity, improve handling characteristics, and tailor the properties of the cured epoxy. They play a crucial role in epoxy formulations by reducing the resin’s viscosity without significantly affecting its chemical structure.

It is a reactive diluent, which plays a critical role in epoxy formulations by contributing to cross-linking, viscosity reduction, and performance enhancement. It can chemically integrate with epoxy resins enabling the development of cured epoxy materials with tailored properties to meet specific application needs.

Technical Specifications


The history of epoxy diluents can be divided into several key stages:

Early Development and Market Entry (1940s-1950s): The initial focus of epoxy resin development was primarily on improving their basic properties and understanding their chemistry. Epoxy resins were primarily developed for military and industrial applications.

Introduction of Reactive Diluents (1960s-1970s): Reactive diluents not only served to lower viscosity but also participated in the curing reaction, contributing to the final properties of the cured epoxy. Common reactive diluents include glycidyl ethers, vinyl ethers, and acrylic esters. The Reactive diluents provided manufacturers with greater control over the performance characteristics of their epoxy systems and expanded the range of applications.

Expansion of Diluent Options (1980s-1990s):  The epoxy diluents with diverse chemical structures and functionalities. The epoxy diluents allowed for greater customization of epoxy formulations to meet specific performance requirements across various industries, including aerospace, automotive, construction, and electronics. Manufacturers developed a wide range of diluents with different chemical structures and functionalities to meet specific application requirements.

Focus on Environmental and Health Considerations (2000s-present): As a long time research and improvement of chemical structure. In recent decades, epoxy diluents have been a growing emphasis on developing epoxy diluents with lower volatility, reduced toxicity, and improved environmental sustainability. Manufacturers, suppliers, and traders were required to comply with various quality standards and regulations governing the production, handling, and distribution of epoxy-based products.

Now, epoxy diluents are essential additives that enable the formulation of epoxy-based materials with tailored properties to meet the diverse requirements of modern industries.

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Types of Epoxy Diluents

Epoxy diluents come in various types, each offering unique properties and advantages suited to different applications. Some common types of epoxy diluents:

Reactive Diluents: Reactive diluents contain functional groups that can participate in the curing reaction of epoxy resins. Reactive diluents serve multiple purposes, including viscosity reduction, improved handling characteristics, and modification of the cured epoxy’s properties.

Types of Reactive Diluents: Reactive diluents encompass a wide range of chemical compounds with reactive functional groups. Common types of reactive diluents include:

  • Glycidyl Ethers: These diluents contain epoxy groups and react with epoxy resins via ring-opening polymerization, forming ether linkages in the cured epoxy.
  • Vinyl Ethers: Vinyl ethers contain vinyl groups that undergo additional reactions with epoxy groups, leading to the formation of covalent bonds in the cured epoxy.
  • Acrylic Esters: Acrylic esters contain acrylate or methacrylate groups and participate in radical polymerization reactions with epoxy resins, contributing to the cross-linking network.
  • Maleic Anhydride Derivatives: Maleic anhydride derivatives react with epoxy groups via addition reactions, forming carboxylic acid functionalities in the cured epoxy.

Non-Reactive Diluents: Non-reactive diluents encompass a wide range of chemical compounds with varying molecular structures and properties. Non-reactive diluents, also known as inert diluents or solvents, do not participate in the curing reaction of epoxy resins but are added to reduce viscosity and adjust formulation properties.

Types of Non-Reactive Diluents: Non-reactive diluents encompass a wide range of chemical compounds with varying properties and functionalities. Common types of non-reactive diluents include:

  • Aromatic Hydrocarbons: Aromatic hydrocarbons such as xylene, toluene, and benzene are commonly used as diluents in epoxy formulations due to their low viscosity, good solvent power, and compatibility with epoxy resins.
  • Aliphatic Hydrocarbons: Aliphatic hydrocarbons such as mineral spirits, hexane, and heptane are another category of non-reactive diluents used in epoxy formulations.
  • Polyols: Polyols such as polyethylene glycol (PEG) and polypropylene glycol (PPG) are non-reactive diluents derived from polymeric alcohols.

Flexibilizing Diluents: Flexibilizing diluents are a specialized type of epoxy diluent designed to improve the flexibility and toughness of cured epoxy formulations. It is commonly used in applications where flexibility and durability are critical, such as coatings for flexible substrates or adhesive applications.

Low Viscosity Diluents: Low viscosity diluents help improve the penetration and adhesion of epoxy formulations onto substrates, resulting in more uniform and durable coatings. It is typically a low molecular weight compound with solvent-like properties.

High Molecular Weight Diluents:  High molecular weight diluents are commonly used in structural adhesives, composites, coatings, and encapsulants where toughness and durability are critical requirements. It improves the toughness of cured epoxy materials by introducing molecular mobility and energy dissipation mechanisms.

Bio-Based Diluents: Bio-based diluents can be used as drop-in replacements for conventional diluents in epoxy formulations, offering similar performance properties while reducing reliance on fossil fuels and mitigating environmental impact.

Manufacturers often formulate epoxy systems using a combination of different diluents to achieve the desired balance of properties and performance.

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Reactive Diluents Market Sales Analysis & Opportunity

The reactive diluents market has seen steady growth in recent years, driven by the increasing demand for epoxy-based products across various industries such as construction, automotive, aerospace, electronics, and coatings.

Market Size and Growth: Market research indicates that the global market size for reactive diluents reached several billion dollars annually, and it is expected to continue growing at a steady pace in the coming years. The global demand for the Reactive Diluents market was approximately 550 thousand tonnes in 2022. Now in the coming year expecting anticipated to grow at a CAGR of 4.12% during the forecast period until 2032.

Chemical Structure: Common reactive diluents include glycidyl ethers, vinyl ethers, and acrylic esters. Epoxy diluents vary in their chemical structure, functionality, reactivity, viscosity, volatility, and compatibility with epoxy resins.

Application Segments: The reactive diluents market caters to various application segments, including coatings, adhesives, sealants, composites, and electronics.

Regional Analysis: The demand for reactive diluents varies by region, with Asia-Pacific emerging as the largest market due to rapid industrialization, urbanization, and infrastructure development in countries such as China, India, and Southeast Asian nations. North America and Europe also contribute significantly to the market, driven by advancements in technology, stringent regulations, and the presence of major manufacturers and end-user industries.

Opportunities: The epoxy diluents market presents several opportunities for manufacturers, suppliers, and traders to capitalize on emerging trends and market dynamics. Manufacturers can explore new markets and application areas to diversify their customer base and increase sales.

The reactive diluents market presents lucrative sales opportunities for manufacturers, suppliers, and traders, driven by the growing demand for epoxy-based products across various industries.

Uses of Epoxy Diluents

It is used for several reasons in epoxy formulations, depending on the specific requirements of the application and the desired properties of the cured material.

  • Viscosity Reduction: One of the primary uses of epoxy diluents is to reduce the viscosity of epoxy resin systems.
  • Controlled Cure Rate: By selecting appropriate diluents, manufacturers can control the rate of cross-linking and polymerization reactions, ensuring proper curing under specific temperature and humidity conditions.
  • Flexibility and Toughness: Flexibilizing diluents and high molecular weight diluents are used to improve the flexibility, toughness, and impact resistance of cured epoxy materials.
  • Improved Properties: Enhanced properties make epoxy formulations suitable for a wide range of applications, including corrosion protection, electrical encapsulation, and structural reinforcement.

Epoxy diluents play a crucial role in formulating epoxy-based products with optimized performance, handling characteristics, and properties.

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Epoxy Diluents for Manufacturers, Suppliers & Traders

Bansal Trading Company maintains a diverse product range of epoxy diluents sourced from various manufacturers and suppliers. We ensure that the epoxy diluents we only supply meet the required quality standards and specifications. We serve as a reliable partner and supplier of epoxy diluents to industries, contributing to the growth and success of businesses that rely on epoxy formulations for various applications.

Bansal Trading Company is a reputed Distributor and Supplier of Epoxy Diluents.  We stay informed about market trends, industry developments, and regulatory changes related to epoxy diluents.

Cardolite NX-­2026, Multipurpose Resin Modifier Preliminary: Cardolite NX-­2026 is a high purity, low odor, lighter color multipurpose resin modifier and accelerator designed for use in coatings, adhesives, and other applications. The long hydrophobic aliphatic side chain of the cardanol molecule gives this product a very low viscosity and provides excellent early water resistance and corrosion protection. Used as an epoxy diluent and accelerator, high-viscosity solvent or solvent-free formulations can achieve enhanced workability, higher solids, and faster cure without sacrificing other performance properties using this product.

Technical Datasheet

Cardolite NC-513 Reactive Diluent for Epoxy Resins: Cardolite NC-513 is a unique reactive epoxy flexibility and diluent. This low-viscosity fluid has predominantly one reactive epoxy group per molecule which combines chemically into the epoxy system.

Cardolite NC-513 is suitable for the following applications:

  • Provides flexibility to solvent-free and high solids surface tolerant marine and industrial coatings.
  • Industrial flooring requires excellent chemical, water, and abrasion resistance.
  • Preparation of amine adducts
  • Coatings in contact with potable water
  • Formulation tool for developing high and 100% solids coatings, especially coatings that require flexibility and excellent water resistance

Technical Datasheet:


Bansal Trading Company serves as a reputable distributor and supplier of epoxy diluents in India. We offer high-quality epoxy diluents to cater to the needs of various industries and applications. Committed to excellence, we ensure that the epoxy diluents they supply meet stringent quality standards and regulatory requirements.


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