1、Polythiol

Polythiol (functional curing agent) is a room temperature or low temperature fast curing agent, with tertiary amine as accelerator, which can cure epoxy resin in 1 to 5 minutes.

2、Synthesis and Properties of Modified Polythiol Epoxy Curing

A series of high performance room temperature fast curingepoxy adhesives were prepared by using epoxy resin E51 as the main resin，2，4，6-tris（dimethylaminomethyl）phenol（DMP-30）as the promoter，and modified polythiol curing agents P（SH） 3 -Si and P（SH） 3 -OH as curing agent.

3、Curing reactions of epoxy powder coatings in perspectives of chemical

The properties of the cured products of epoxy powder coatings are dominated by the curing systems. This review discusses the types, reaction principles, characteristics of curing agents and accelerators that participate in the curing reaction with different epoxy resins.

Accelerating the Curing of Hybrid Poly (Hydroxy Urethane)

In this work, a system that combines an amino-terminated PHU (NH 2 –PHU–NH 2), an epoxy resin, and a thiol compound was employed to develop high-shear strength PHU-epoxy hybrid adhesives able to cure at room temperature in short times.

Study on the curing behavior of polythiol/phenolic/epoxy resin and the

In this paper, phenolic resin and epoxy resin (EP-PF) are used as the resin matrix, Polythiol and Triethanolamine are used as curing accelerators to prepare EP-PF composite materials.

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.

Synthesis and Property Analysis of a Novel Epoxy Composite Curing Agent

The performance of the curing agent was investigated based on raw material ratio, reaction temperature and reaction time. Moreover, the curing time, amine value, viscosity and infrared spectrum were tested. It was compounded with other highly active curing agents and resins.

(PDF) Study on the curing behavior of polythiol/phenolic/epoxy resin

Phenolic/epoxy resin (EP-PF) composites were prepared, in which phenolic resin and epoxy resin was used as matrix, polythiol and triethanolamine as curing accelerators. The uniform...

Chemistry of Polythiols and Their Industrial Applications

This mini review provides insights into emerging venues for their industrial applications, especially for the applications of thiol-ene, thiol–isocyanate, and thiol–epoxy reactions, highlighting a brief chemistry of thiols as well as various approaches to polythiol synthesis.

Polythiol epoxy resin curing agent and preparation method thereof

The polythiol epoxy resin curing agent uses cheap and accessible raw materials to greatly lower the cost of the polythiol epoxy resin fast curing agent.

In modern materials science, the curing of epoxy resins is a critical process. Among various curing systems, polythiol epoxy curing agents have become indispensable due to their unique properties and broad application prospects. This article explores the working principles of polythiol epoxy curing agents, analyzes their mechanisms, and examines their impact on the epoxy resin curing process.

1. Overview of Polythiol Epoxy Curing Agents

Polythiol epoxy curing agents are epoxy compounds containing thiol groups. They react chemically with active hydrogen atoms in epoxy resins, promoting their curing. These curing agents exhibit excellent adhesion, mechanical strength, and chemical resistance, making them widely used in aerospace, automotive manufacturing, electronics, and other fields.

2. Mechanism of Polythiol Epoxy Curing Agents

1. Crosslinking Reaction: Thiol groups in the curing agent undergo crosslinking reactions with hydroxyl groups in epoxy resins, forming a three-dimensional network structure. This enhances the mechanical properties and thermal resistance of the material.

2. Catalytic Acceleration: During curing, polythiol epoxy curing agents act as catalysts, accelerating the reaction rate of active hydrogen atoms in epoxy resins, thereby shortening curing time.

3. Interfacial Interaction: The curing agent promotes strong interfacial interactions between epoxy resins and substrates, improving adhesion and bonding strength.

4. Environmental Adaptability: Polythiol epoxy curing agents maintain superior performance under various temperature and humidity conditions.

3. Practical Applications of Polythiol Epoxy Curing Agents

Aerospace Example: Aircraft fuselages and engine components endure extreme temperatures and pressures. To ensure stability and reliability, polythiol epoxy curing agents are often used for surface treatment. Applying the curing agent to metal surfaces creates a protective layer with excellent adhesion and corrosion resistance, enhancing component lifespan and safety.

Electronics Example: In circuit board encapsulation, polythiol epoxy curing agents improve electrical performance and resistance to vibration and impact. Coating circuit boards with the curing agent shields them from environmental damage, extending their operational life.

As highly efficient epoxy curing agents, polythiol compounds play a vital role in the curing process through crosslinking, catalytic acceleration, interfacial interaction, and environmental adaptability. Their use significantly improves epoxy resin performance. In future materials research and applications, polythiol epoxy curing agents are poised to continue leveraging their unique advantages, supporting advancements across industries.