Therefore, it is necessary to conduct research on the components that affect the reactivity of resins and curing agents. The effects China Epoxy powder coatings of monomers on the performance of polyester resins, as well as the effects of the layout of resin molecules and the variety and amount of curing accelerators on the performance of hybrid low-temperature curing powder coatings are discussed.
In terms of energy saving and consumption reduction and the coated substrate, hybrid low-temperature curing powder coatings have become a new development direction in the powder coating industry. Powder coatings and coating systems are known for their ecology, economy and applicability, which can reduce VOC emissions and meet various regulatory requirements. Therefore, the resin plan requires a general consideration of various components.
Powder coatings have attracted more and more people’s attention because of their economy, environmental protection, and excellent performance.Low-temperature curing powder coating, high solid content solvent-based coating . This research focuses on the impact of polyester resin raw material composition, resin molecular layout and curing accelerator on the performance of polyester/epoxy low-temperature curing powder coatings.
Low temperature curing powder coating Low-temperature curing powder coatings summarize the dual characteristics of coatings and insulation materials, and the coating layer formed after drying will have certain strength and elasticity. High solid content solvent-based coatings High-solid content solvent-based coatings are developed in order to adapt to the increasingly severe conditions of protection.
The Tg of ordinary polyester resin for low temperature curing powder coating is 50~60℃, softening point ≥100℃, and melt viscosity 2~4Ps. This is because the resin can be melted at a lower temperature, so that various reactive groups are fully contacted, and the curing reaction can be carried out quickly, but a too low Tg will reduce the storage stability of the coating.
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