Facile way to enhance the properties of powder coating films
Ultrafine powder coatings have superior film performance but poor flowability due to the high interaction between particles, which can be improved by the addition of inorganic flow additives. However, the improvement is limited and more importantly, the film performance deteriorates because of their incompatibility with the organic coating resin. In a new study, a resin encapsulation approach was proposed to modify the commercial inorganic flow additives for the improvement of powder flowability and maintaining film quality.
Effective and facile way
It was found that the encapsulation of additives with the same resin of the host powder coating can enhance both flowability and film properties, compared to commercial nano-silica. The negative effect raised by the additives on film quality can be mitigated by resin encapsulation. Higher gloss and lower roughness are obtained at larger resin content. According to the researchers, their study provides an effective and facile way to ameliorate the function of the flow additive and enhance the properties of powder coating films.
The study has been published in Progress in Organic Coatings, Volume 179, June 2023.