Requirements for curing agents for powder coatings

Requirements for curing agents for powder coatings

Curingagents are not required in thermoplastic powder coatings, but in thermosettingpowder coatings, curing agents are an essential component of the powder coatingcomposition. Without curing agents, thermosetting powder coatings cannot becross-linked and cured to form films with certain physical mechanics. Coatingswith properties and chemical resistance. The properties of the curing agent arethe main factors that determine the performance of powder coatings and films.

        Thecuring agent should have a good chemical reaction activity with the resin. Itdoes not react with the resin under normal temperature and melt-extrusionmixing temperature conditions, and under the baking curing conditions, it willrapidly undergo a cross-linking curing reaction with the resin to obtain anappearance flow. Coating with good flatness, good physical and mechanicalproperties and chemical resistance.

        Consideringthe manufacturing process and storage stability of powder coatings, the curingagent is solid rather than liquid under normal or room temperature conditions,and is preferably a solid powder or a solid granular or flake that is easilycrushed.

        Fromthe perspective of energy conservation, the crosslinking curing reactiontemperature of the curing agent and the resin is low and the reaction time isshort, which is conducive to low-temperature and short-term curing filmformation, which can save energy and improve production efficiency.

The rawmaterials of the curing agent come from a wide range of sources and areinexpensive, suitable for a wide range of industrial applications.