The industrial paints are used for industrial purposes such as motor vehicle, washing machine, and pipelines painting operations. The household paints are used to cover buildings and furniture.
|Mixing||Alkyd resins or vegetable oils (boiled linseed oil), fatty acids, pigments (titanium dioxide), fillers (talc, and calcium carbonate), and plasticizers are weighed, and fed automatically to the mechanical mixers.|
|Grinding||After mixing, the mixture (batch) is transferred to the mills for further mixing, grinding, and homogenizing. |
The type of used mill is related to the type of pigments, vehicles, and fillers.
|Intermediate storage||In some plants, after grinding, the batch is transferred to an intermediate storage tank, because the batch may need further grinding to obtain the required degree of homogeneity.|
|The batch is then transferred from the intermediate storage tank to a mixer for thinning and dilution, where solvents, and other additives are added.|
|Filtration and finishing||After thinning, the batch is filtered in a filter, to remove nondispersed pigments and any entrained solids. Metal salts are added to enhance drying (cobalt, lead, zirconium).|
|Packaging and |
|The paint is poured into cans or drums, labeled, packed, and moved to storage, each step being completely automatic.|