Coating additives can be roughly divided into three types according to their appearance: powder, slurry and liquid. The state in the coating can be divided into dissolved state and dispersed state.
The addition method and process of coating additives are introduced as follows:
1. When the powder-like coating additive is in a dispersed state,
Addition method: add before grinding or grind the powder additives individually and then mix them in the paint let-down stage;
Addition process: Grind and stir evenly, then grind to the required fineness with various dispersing equipment.
2. When the coating additive with powder appearance is in the dissolved state,
Addition method: Add in the paint making stage or components where the powder additive has good solubility.
Adding process: Stir, disperse, and dissolve evenly.
3. When the slurry-like coating additive is in a dispersed state,
Addition method: add co-grinding in the grinding part, add it after making pre-coagulated paste for color development, add it in the paint mixing stage.
Addition process: After grinding and stirring, grind and disperse with dispersing equipment or disperse at high speed with high-speed dispersing machine.
4. The coating additives with liquid appearance are generally dissolved in the coating,
Addition method: If the addition amount is too low, the solid content is high, the acid or alkali is too high, the reactivity is high, and the polarity of the color development is quite different, it is recommended to dilute with a suitable diluent and stir well before adding it to the paint. , others can be added directly.
Addition process: dilute and stir, or stir separately.
The key point when adding paint additives is to fully disperse (disperse to the required fineness) or dissolve. During the addition process, pay attention to the pre-dilution of high concentrations and the order of adding incompatible paint additives. The second is to consider the paint configuration. Phases add convenience and security. These inductive addition methods and addition processes are used as a reference. Different products provided by different manufacturers still need to be added according to the properties and functions of different products. More detailed suggestions can be obtained from the product technical manuals of each manufacturer.
