Two-component TGIC polyester resin is favored for its excellent coating gloss. This excellent gloss is mainly due to its unique chemical structure, physical properties and performance during the curing process. The following will be elaborated in detail from these three aspects.
1. Influence of chemical structure: Two-component TGIC polyester resin is made of polyol and polyacid through polycondensation reaction, in which TGIC (triglycidyl isocyanurate) is used as a curing agent or cross-linking agent in conjunction with the polyester resin body. This structure can form a highly cross-linked network structure during the curing process, improving the hardness and flatness of the coating. The hardness and flatness of the coating are important factors in determining the gloss, so the coating of the two-component TGIC polyester resin can show excellent gloss.
2. Contribution of physical properties: Different types of two-component TGIC polyester resins have different acid values, viscosities and glass transition temperatures (Tg). These physical properties directly affect the fluidity of the resin and the morphological changes during the curing process, which helps to form a uniform and smooth surface during the curing process and improve the gloss of the coating.
3. The role of the curing process: The temperature and time during the curing process are the key factors that determine the performance of the coating. The curing conditions of all types of two-component TGIC polyester resins are 200°C×12'. This high-temperature curing process can promote the full cross-linking and curing of the resin molecules, forming a dense and uniform coating structure, avoiding defects on the coating surface, and improving the gloss of the coating.
