1、A phosphorus/silicon hybrid curing agent for epoxy resin
This study proposes an effective strategy for the development of high-performance epoxy resin curing agents, offering fresh perspectives for overcoming traditional performance trade-offs through molecular structure design.
2、Preparation of phosphorus‐containing phenolic resin and its application
For the sake of improving the flame retardancy of epoxy resin (EP), a novel phosphorus-containing phenolic resin (PPR) synthesized in our group instead of conventional phenolic resin (PR) was used to cure EP in the present research.
3、Phosphorus
Current research work focuses on the synthesis of phosphorus- and silicon-containing amine curing agent (PSA) for epoxy resins. PSA was synthesized using phenyl phosphonic dichloride and ethylenediamine as raw materials and further modification with 3-glycidoxypropyltrimethoxysilane.
Synthesis of a Novel Phosphorus
A novel phosphorus-containing compound diphenyl- (2,5-dihydroxyphenyl)-phosphine oxide defined as DPDHPPO was synthesized and used as flame retardant and curing agent for epoxy resins (EP).
Phosphorus
To prepare epoxy resins (EP) with flame retardancy and remolding capability, novel amine curing agents (DDPM and DDPS), which incorporate phosphonates and bis-Schiff bases, were used to replace DDM partially or completely for EP curing.
Synthesis of a New Flame Retardant Curing Agent with Phosphorus and
Abstract The synthesis has been made on a new kind of phosphorus-containing compound 2- (phenylphosphoryl)-1,4-benzenediol, which is defined as PPBDO. Besides, it is utilized as a flame retardant and meanwhile a curing agent of epoxy resins (EP).
Phosphorus
In this paper, two multifunctional curing agents (DDPM and DDPS) were prepared to improve the overall performance of EP. By incorporating a Schiff base and phenyl-phosphonate bonds via epoxy ring-opening reactions, the bisphenol EP showed excellent flame retardancy and remolding capability.
Synthesis of a Novel Phosphorus
A reactive phosphorus-containing compound, bis-phenoxy (3-hydroxy) phenyl phosphine oxide (BPHPPO) was first successfully synthesized to produce the phosphorus-containing flame retardant...
Synthesis of phosphorous
The chemical structure of the intermediate and the curing agent was characterized by Fourier transform infrared (FTIR) and nuclear magnetic resonance spectroscopy. An epoxy resin was then cured with the phosphorous-based curing agent used in different ratios and with a petroleum-based curing agent.
A new phosphorus flame‐retard curing agent for epoxy resin/anhydride
A new phosphorus containing anhydride (DPO-MA) curing agent is successfully synthesized via the addition reaction between diphenylphosphinoxid (DPO) and maleic anhydride (MA). It can improve the flame retardancy of epoxy resin (EP) without significantly deteriorating its mechanical properties.
Exploration of Phosphorus-Containing Epoxy Resin Curing Agents
In modern industrial and construction fields, epoxy resins are widely used due to their excellent physical properties, chemical stability, and superior adhesive performance. the curing process of epoxy resins is a complex chemical reaction that requires specific curing agents to initiate. The selection of curing agents directly impacts the performance and application range of epoxy resins. In recent years, phosphorus-containing epoxy resin curing agents have garnered significant attention due to their unique properties. This article explores the types, characteristics, and applications of phosphorus-containing epoxy resin curing agents in various fields.
I. Overview of Phosphorus-Containing Epoxy Resin Curing Agents
Phosphorus-containing epoxy resin curing agents are compounds that react with epoxy resins to form an insoluble polymer network structure. These curing agents typically contain phosphorus atoms and can be organic or inorganic phosphorus compounds. During the curing process, they promote cross-linking reactions, thereby enhancing the mechanical strength, heat resistance, and corrosion resistance of epoxy resins.
II. Common Phosphorus-Containing Epoxy Resin Curing Agents
- Organic Phosphorus Compounds
Organic phosphorus compounds are among the most common phosphorus-containing epoxy resin curing agents. These include phosphate esters, phosphonate esters, and phosphite esters. These compounds react with the epoxide groups in epoxy resins to form stable chemical bonds, thereby facilitating the curing process.
- Inorganic Phosphorus Compounds
In addition to organic phosphorus compounds, inorganic phosphorus compounds are also frequently used as curing agents. Examples include phosphate salts, phosphoric acid hydroxides, and ammonium phosphate salts. Inorganic phosphorus compounds exhibit higher thermal stability and chemical corrosion resistance, making them suitable for curing under high-temperature and harsh environmental conditions.
III. Characteristics of Phosphorus-Containing Epoxy Resin Curing Agents
- Enhanced Mechanical Strength
Phosphorus-containing curing agents significantly improve the mechanical strength of epoxy resins. This is because the cross-linked network structure formed during curing becomes denser, effectively resisting external loads. This property makes phosphorus-containing epoxy resins highly promising for manufacturing high-performance composites, coatings, and adhesives.
- Improved Heat Resistance
Phosphorus-containing curing agents enhance the heat resistance of epoxy resins. The cross-linked network structure formed during curing reduces heat transfer efficiency, lowering the material’s thermal expansion coefficient. This enables phosphorus-containing epoxy resins to perform well in high-temperature environments.
- Enhanced Corrosion Resistance
Phosphorus-containing curing agents improve the corrosion resistance of epoxy resins. The cross-linked network structure isolates moisture and other corrosive substances, reducing the risk of material degradation. This characteristic makes phosphorus-containing epoxy resins valuable in industries such as chemicals and petroleum.
IV. Applications of Phosphorus-Containing Epoxy Resin Curing Agents
- Electronic Encapsulation
Phosphorus-containing curing agents play a critical role in electronic encapsulation. For example, in chip encapsulation and circuit board bonding, these agents provide excellent electrical properties, mechanical strength, and reduced thermal expansion, improving reliability.
- Coatings Industry
Phosphorus-containing curing agents are widely used in the coatings industry. In anti-corrosion, wear-resistant, and decorative coatings, they offer superior corrosion and abrasion resistance while maintaining aesthetic appearance and gloss.
- Aerospace Field
In aerospace applications, phosphorus-containing curing agents are indispensable. For example, in aircraft engine blades and spacecraft shells, these agents deliver high strength, heat resistance, and fatigue resistance, meeting stringent environmental requirements.
As highly efficient curing agents, phosphorus-containing epoxy resin curing agents possess unique properties and broad application prospects. By selecting appropriate phosphorus-containing curing agents, the performance advantages of epoxy resins can be fully leveraged to meet diverse application needs. In the future, advancements in science and technology, along with the development of new materials, will further expand and deepen the research and application of phosphorus-containing epoxy resin curing agents.
