General properties of additives to be used in powder coating industry
1- Preferably solid, granule or micronized powder form with Glass Transition Temperature(Tg) above 50 ‘c
In case of using liquid form of additive, it’s suggested to master Bach it in suitable carrier before adding to the other raw materials.
2- Having the most active material . preferably 100% and maximum efficacy in small amounts
3- Affect exclusively on the property of powder coating that should be controlled such as : increase or decrease gloss, controlling the size and type of texture, etc.
4- In most cases additives should not be chemical active or react with resin or other components in the formula. However, in some cases additives are chemically active components.
