When they are mixed together form a homogeneous compound. Paints are often diluted with paint for easy use. In the case of two-component paints, a hardener is added.
Once mixed, the original paint will be mixed with solvent or diluent to adjust the viscosity to suit the painting conditions.
Plastic resin is the main component of paint, in general it is viscous and transparent liquid that produces a coating after painting onto the object to be dried.
The properties of plastic resins directly affect the properties of the coating such as hardness, resistance to the solvent and changes in weather. And affect quality such as surface underside, gloss, ease of use as well as paint drying time.
Film coatings formed after coating on the surface of the material will move from a viscous liquid to a solid state and adhering to the drying agent.
Plastic resins are polymeric organic compounds of natural or synthetic origin.
They are extracted from plants such as varnish, lacquer, pine resin, oils such as tuna, linseed oil, soybean oil, ... or animal derived fats, which are mixed with the pigment. To make decorative and protective paints depending on the purpose of use. This plastic resin is not used in mass production.
Are polymeric compounds which are synthesized from the polymerization reactions of the polymerization or condensation process. Compared with natural-derived filmmakers, synthetic filmmakers have larger molecular weights, more complex chemical structures, and therefore have more superior characteristics and properties.
Synthetic resins are divided into two types, thermoplastic and thermoplastic.
Thermoplastics are those that are melted or transferred from a solid state to a state of melting or decomposition under the effect of high temperatures. Such as Polyethylene, Polyvinyl chloride, Polypropylene, Polystiren, ...
Thermoset resins are plastics that are altered by chemical reactions that undergo a process of curing or decomposition of macromolecules. Thermoset resins are commonly used as coatings for common paints such as Melamine resins, Acrylic resins, Polyester resins, etc.
Pigments are fine grained particles, particle sizes ranging from a few microns to tens of microns, dispersed in the paint medium and give the film its special properties. The importance of pigment is to give the film a certain color, loss of transparency, some pigments can give the film has the function and ability to work better. The pigment is evaluated by the coating, the coating depends on the opacity and the refractive index of the pigment. Depending on the function, pigments include: inorganic pigments, organic pigments, metallic pigments, auxiliary pigments.
Representing this group includes colored pigments such as: ZnO (white), CdSCdSe (dark brown), PbCrO4 (yellow), Cr2O4 (green), anti-rust pigments such as Fe2O3 (red brown), PbO2.2PbO (orange), ...
These are pigments synthesized from organic compounds with the group of functions such as:
- N =N - , =CH-N=,…
Metallic pigments such as aluminum powder (AL), zinc powder (Zn), lead powder (Pb), ...
Auxiliary pigments are used as powders or fillers to improve some properties of paint film, such as Barite (BaSO4, which is a filler), Mica (K2O.2Al2O3.6SiO2.2H2O , put into paint to reduce water permeability, avoid cracking and chalking), kaolin, talc powder,...