The curing process of Two component TGIC polyester resin is a complex and precise chemical reaction process involving the polycondensation reaction of polyols and polyacids and the role of TGIC (triglycidyl isocyanurate) as a curing agent or crosslinking agent.
1. Reaction principle
During the curing process of Two component TGIC polyester resin, the resin body (usually polyester resin) reacts chemically with the TGIC curing agent. The epoxy groups in the TGIC molecule cross-link with the carboxyl groups in the polyester resin to form a three-dimensional network structure. This cross-linking reaction enhances the mechanical strength of the resin and also improves its chemical corrosion resistance and heat resistance.
2. Curing conditions
As shown in the table above, the curing conditions of Two component TGIC polyester resin are usually 200°C×12 minutes. This temperature and time are set to ensure that the cross-linking reaction between the resin body and the TGIC curing agent can be fully carried out to form a stable three-dimensional network structure. Accurate control of curing temperature and time is essential to obtain ideal coating properties.
3. Effect of curing time
The curing time directly affects the curing effect of Two component TGIC polyester resin. Too short a curing time may lead to insufficient cross-linking reaction, affecting the hardness, gloss and adhesion of the coating. Too long a curing time may cause excessive cross-linking, resulting in brittle coating and performance degradation. Therefore, the curing condition of 200°C×12 minutes is the best condition after rigorous testing and optimization.
4. Characteristics after curing
After a curing process of 200°C×12 minutes, Two component TGIC polyester resin can form a coating with high hardness, good gloss and strong adhesion. The cured coating also has excellent weather resistance, chemical corrosion resistance and heat resistance, and is suitable for powder coatings, coil coatings, automotive coatings and other occasions with high requirements for coating performance.
5. Characteristics and applications
Different types of Two component TGIC polyester resin show different characteristics after curing and are suitable for different application scenarios. For example, YZ9818 and YZ9833 can be used to prepare two-component low-gloss powder, while YZ9895 and YZ9899 can be used to prepare two-component super-weather-resistant powder. These characteristics and diverse applications make Two Component TGIC polyester resin have a wide range of application prospects in the coating industry.
