1、Preparation of a light color cardanol

In this study, a novel epoxy curing agent derived from cardanol butyl ether with light color, good color stability and low viscosity was successfully prepared. The curing agent was synthesized from cardanol butyl ethers, formaldehyde and diethylenetriamine by Mannich reaction.

2、Preparation of cardanol

Here we prepare a cardanol-based curing agent suitable for underwater curing of drainage pipeline networks by Mannich reaction using cardanol, paraformaldehyde (PA), and m -phenyldimethylamine (MXDA) as monomers.

3、Preparation of cardanol

The underwater curing agents have demonstrated promising potential in various applications, especially in underwater repair engineering, yet have proven considerable challenging. Here, we report a cardanol-based curing agent for epoxy resin that achieves robust adhesion to steel and concrete substrates both in air and underwater.

4、Synthesis and curing kinetics of cardanol‐based curing agents for epoxy

The curing kinetics of the prepared epoxy resin/phenalkamine systems has been investigated using differential scanning calorimetry (DSC), and determined by Kissinger, Flynn–Wall–Ozawa, and Crane methods.

5、Catalyst

This work offers a new method for preparing cardanol-based epoxy vitrimers that be used to make coatings, hydrogels, biomaterials, adhesives, and commodity plastics in the future.

Preparation of cardanol

Cardanol, paraformaldehyde, and m-phenyldimethylamine are selected as the polymeric monomers to synthesize curing agent by Mannich reaction in the absence of chemical cross-linker agents.

Synthesis and Curing Kinetics of Cardanol

In this study, three different novel cardanol-based phenalk-amines with good stability were successfully prepared by Mannich reaction, using phenolic compounds with paraformal-dehyde and HDA (or...

Sustainable Composite of Cardanol Based Phenalkamine Cured Epoxy

This study explores the use of bio-based phenalkamines as curing agents for epoxy resin to enhance the mechanical properties of polymer composites and fiber-reinforced laminates.

degruyter_epoly_epoly

Abstract: The underwater curing agents have demonstrated promising potential in various applications, especially in underwater repair engineering, yet have proven consider-able challenging. Here, we report a cardanol-based curing agent for epoxy resin that achieves robust adhesion to steel and concrete substrates both in air and underwater.

Sustainable flame

This study presents a novel approach by synthesizing three types of cardanol-based flame-retardant epoxy curing agents, C1-DPP-MA, C2-PDP-MA, and C3-POC-MA, as sustainable bio-based alternatives to conventional petroleum-derived curing agents.

Epoxy Cardanol Curing Agent: A Multifunctional Chemical Material

The epoxy cardanol curing agent is an indispensable chemical additive in modern industrial and construction sectors, widely used in the curing processes of materials such as epoxy resins, polyurethanes, and vinyl esters. With its unique properties and broad application potential, it has become a critical material in scientific research and industrial production. This article provides a detailed overview of the epoxy cardanol curing agent, including its chemical composition, physical properties, application fields, and precautions for practical use.

I. Chemical Composition of Epoxy Cardanol Curing Agent

The epoxy cardanol curing agent is a compound containing epoxy groups, typically existing in the form of a fatty acid ester. Its structure consists of an epoxy ring and a fatty acid chain segment, where the latter provides flexibility and plasticity during the curing process. The epoxy ring and fatty acid chain are connected via ester bonds, forming a complete chemical structure.

The chemical nature of the epoxy cardanol curing agent determines its role in the curing process. When mixed with a curing agent, the epoxy ring undergoes ring-opening reactions, releasing significant heat. This triggers polymerization reactions of isocyanates in the curing agent, forming a stable cross-linked network structure. This process endows materials with excellent mechanical strength, weather resistance, and corrosion resistance.

II. Physical Properties of Epoxy Cardanol Curing Agent

The physical properties of the epoxy cardanol curing agent include density, viscosity, flash point, and melting point, which are critical for evaluating its performance and application range:

1. Density: Variations in density affect flowability and filling capacity. Higher-density curing agents require more energy to flow, while lower-density ones penetrate materials more easily.
2. Viscosity: Viscosity measures flowability. Excessive viscosity slows curing, reducing efficiency, while low viscosity may result in incomplete curing and compromised material properties.
3. Flash Point: The flash point reflects flammability and is crucial for storage and handling safety. Higher flash points indicate greater safety but may limit application scope.
4. Melting Point: The melting point reflects thermal stability. Lower melting points signify better stability, reducing thermal decomposition or volatilization risks, which is essential for prolonging shelf life and ensuring product quality.

III. Application Fields of Epoxy Cardanol Curing Agent

Due to its unique properties, the epoxy cardanol curing agent is widely used in various industries:

1. Construction: Used in curing concrete, gypsum, tiles, and other building materials. It enhances compressive strength, wear resistance, and durability while maintaining aesthetic and施工 convenience.
2. Automotive Manufacturing: Applied to car bodies, chassis, and interior parts. It improves impact resistance, wear resistance, and corrosion resistance, extending component lifespan.
3. Electronics Manufacturing: Used in circuit boards, electronic components, and insulating materials. It boosts electrical performance, heat resistance, and humidity resistance, ensuring device stability.
4. Aerospace: Employed in aircraft fuselages, engines, and turbine blades. It enhances load-bearing capacity, high-temperature resistance, and corrosion resistance, ensuring flight safety.
5. Other Industries: Also used in furniture, sports equipment, and medical device manufacturing. It improves product performance and longevity, meeting specialized needs across fields.

IV. Precautions for Practical Application

When using epoxy cardanol curing agents, the following measures ensure safety and effectiveness:

1. Storage Conditions: Store in cool, dry environments away from heat sources and direct sunlight. Prevent exposure to moisture or extreme temperatures to avoid degradation.
2. Accurate Mixing Ratios: Follow manufacturer-specified ratios strictly. Improper ratios can compromise curing outcomes or cause adverse reactions.
3. Safety Protection: Wear gloves, safety goggles, and other personal protective equipment (PPE) to prevent skin or eye contact.
4. Environmental Handling: Dispose of residues properly after use. Avoid dumping into drains to prevent environmental pollution.
5. Quality Control: Regularly inspect product performance. Halt usage immediately if abnormalities arise and report issues to relevant departments.

As a vital chemical additive, the epoxy cardanol curing agent plays a significant role in modern society. Its widespread use enhances material performance and longevity, supporting advancements across industries. proper handling and adherence to safety protocols are essential. With technological progress, the epoxy cardanol curing agent is poised for broader applications, contributing further to human progress.