1、Facile synthesis of bio
In this work, a bio-based latent curing agent--phytate salt PAIM--was prepared by a simple salt-forming reaction between imidazole and naturally occurring phytic acid, and was mixed with commercial bisphenol A epoxy to obtain one-component epoxy system.
2、Synthesis of a curing agent containing trifunctional epoxy groups for
In this work, tris (oxiran-2-ylmethyl) benzene-1,3,5-tricarboxylate (TOTC) was successfully synthesized by an innovative two-step oxidated method with easy control of reaction conditions and mild reaction process.
3、Synthesis of epoxy curing agents containing different ring structures
Two kinds of aliphatic epoxy curing agents containing ring structures were synthesized from rosin acid and isosorbide, respectively. They were cured with diglycidyl ether bisphenol A (DER331) and the ultimate propertied of the cured resins were investigated.
4、Mechanism and Applications of Epoxy Curing Agents
The working principle of epoxy curing agents can be summarized as follows: Amines, acids, and phenols in curing agents react with epoxy groups in the resin, forming a three-dimensional network structure that enhances mechanical strength and chemical resistance.
The epoxy resin system: function and role of curing agents
In the presence of curing agents, epoxy resins become rigid and infusible. Eco-friendliness and mechanical functionality have emerged as vulcanization properties.
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.
A Study on the Synthesis, Curing Behavior and Flame Retardance of a
In this paper, a novel flame retardant curing agent was synthesized, and used to cure and flame retard epoxy resins. The study on curing behavior showed that DOPO-MAC was an effective curing agent for epoxy resin.
Theoretical studies of mechanisms of epoxy curing systems
epoxy resin, a particular curing agent and/or a particular catalyst. The examination of all possible reaction pathways for each curing system can allow us to predict the most preferable pathway in the system and can enable the development of a more accurate kinetic model for the system.
The epoxy resin system: function and role of curing agents
Epoxy resins are frequently used in electrical devices, castings, packaging, adhesive, corrosion resistance, and dip coating. In the presence of curing agents, epoxy resins become rigid and infusible. Eco-friendli-ness and mechanical functionality have emerged as vulcanization properties.
Functional dendritic curing agent for epoxy resin: Processing
In this work, a functional curing agent was synthesized with imidazole blocked 2,4-tolulene diisocyanate (TDI) by using dendritic polyester polyol (p1000) as the toughening segment, which had an multiply role in the toughening and curing of bisphenol A type epoxy resin (E−44).
The synthesis of epoxy curing agents is a science involving complex processes of chemical reactions, physical changes, and chemical engineering. In modern industry, epoxy curing agents are critical materials for the application of epoxy resins, used to manufacture various high-performance composite materials such as plastics, coatings, adhesives, and more. This article explores the synthesis process of epoxy curing agents.
The synthesis of epoxy curing agents begins with the selection of raw materials. These typically include bisphenol A or alicyclic polyamine compounds, which serve as providers of epoxy groups, and hardeners to facilitate the curing reaction. For example, diglycidyl ether (DGE) is a commonly used bisphenol A-type epoxy curing agent. Its molecular structure contains two glycidyl groups, which can undergo cross-linking reactions with epoxy groups in epoxy resins, forming a three-dimensional network structure.
The first step in synthesizing epoxy curing agents is preparing the raw materials. This involves mixing bisphenol A compounds with dehydrating agents and removing solvents and moisture through heating and decompression to obtain prepolymers. The role of dehydrating agents is to control the reaction rate and purity of the product.
Next, the prepolymer is mixed with a hardener. The choice of hardener is crucial for the curing process, as different hardeners have varying performance characteristics, such as reaction speed, curing time, and mechanical strength. For instance, aliphatic polyamine compounds are commonly used hardeners that react with epoxy groups to form stable amide bonds, enabling rapid curing.
Temperature control during the synthesis process is a key factor. Epoxy curing reactions typically require a specific temperature range to ensure moderate reaction rates and stable product performance. Temperatures that are too high or low can affect reaction efficiency and the final product's properties.
In addition to temperature, reaction time and stirring conditions must also be strictly controlled. Within an appropriate reaction time, epoxy groups can fully react with the hardener to form a stable cross-linked structure. Proper stirring ensures uniform mixing of reactants, preventing localized over-reactions and product inconsistencies.
After synthesis, the epoxy curing agent undergoes post-processing steps such as filtration, drying, and crushing to achieve the desired particle size and purity. This stage is critical for improving product performance and extending its service life.
The synthesis of epoxy curing agents involves not only chemical reactions but also physical changes and multiple aspects of chemical engineering. From raw material selection to process control, each step requires precise operation and fine-tuning. with advancements in technology and the development of new materials, methods for synthesizing epoxy curing agents continue to innovate and improve.
The synthesis of epoxy curing agents is a complex and delicate process that demands continuous exploration of new synthetic pathways and technologies by researchers to enhance product quality, reduce costs, and meet the needs of diverse applications. With the development of materials science, we can confidently expect that epoxy curing agent synthesis technology will become more mature and efficient, contributing greater value to human society.
