Currently there is a wide range of paints available on the market, knowledge the bases, characteristics and properties of each family of paints, allow us to make the optimal decision in the selection of paints based on technical and economic requirements required by the job.
Among the various forms of grouping families of paints available today, we can cite the following classifications:
By the level of specific layer of the paint itself:
The primers are the first layers of paint applied on the surface, the primers are designed and formulated to protect the surface against oxidation and corrosion and to be the basis for a good anchorage and adhesion for subsequent layers of paint.
Sealants are the layers of paint that are located between the primers and topcoats, are generally used when apply putty, to seal and isolate putty to finish coat as well as improve adherence and support for the following layers of paint.
Topcoats refer to the entire set of paints that are used to colour the surface, are paints which are to be resistant to abrasion, ultraviolet light, chemicals, moisture, etc. ... due that kind of paints are in direct contact with the outside.
By the sector to which it is intended that the application uses:
Paints for the automotive industry
Paints for general industry
Paints for the construction
Decorative paints (home)
The paints are designed according to the sector which will go, for example primers used in the automotive sector are totally different from the primers used in the manufacture of ships, due to the different functional requirements (the paints of ships must be very resistant to humid environments and extremely saline) and the different materials on which the paint is applied (cars widely used aluminium and plastics of different compositions, while ship used primarily steel).
By the number of coats applied in the paint system:
Direct paint are those paints that are applied directly on the material or substrate, these paints offer some resistance to both oxidation and ultraviolet radiation and other external agents, providing directly the colour, gloss and aesthetic finish.
Monolayers paints are known to the classical application of 2 coats of paint, primer plus enamel, the primer layer protects the material from oxidation and corrosion and promotes adhesion of the next layer of paint, the top layer commonly called enamel or direct gloss is provided by the colour, gloss and resistance to light and environmental agents.
Bilayers correspond to the paint coating system consisting of three layers, primer plus basecoat plus varnish, in this case the final finish is achieved by means of two different layers, basecoat is the first layer that provides colour and metallic effect, final transparent varnish layer provides gloss and protection against external agents.
Finally we found trilayers paints, in which the paint application system consists of 4 layers, the first coat of primer and the last 3 layers correspond to the finish, with the latter three layers is achieved pearlescent or chameleon effects (colour change depending on the light incidence and the angle at which we see), this type of paints are used primarily in tuning automotive sector.
By the degree of emission of volatile compounds:
Paint with high solids content
For ecological reasons and job security, it has developed new ranges of paint that are designed to reduce the amount of solvents that are emitted and used during mixing, application and curing paint, due it produces a source of emission of volatile organic compounds (VOC's) harmful to both humans and the environment.
Powder paints are more environmentally friendly due it does not require or contain any concentration of solvents, water-based paints contain a tiny concentration of solvent which is negligible, follow the high-solids content paints which require less amount of diluent to the solvent based paints.
By the number of components or containers need to dry or cure the paint:
1-component paints are those paints which not need to be mixed with any hardener so that drying occurs, this type of paint dried by the action of moisture, ultraviolet light, high temperature, etc. ...
2-component paints are those that need to add a hardener during the mixing process, in order to achieve the curing of the paint.
By the chemical backbone resin that paint is composed:
Due to the chemistry of the base resin or polymer base, each type of paint provides qualities and characteristics which can be improved by the addition of the fillers and additives, such as silicone-based paint are paints that repel water and facilitate cleaning of graffiti, silicate based paints are highly resistant to temperature are thus resins used in anti-heats paints.
Now that you know different ways of classifying the paint, can you classify the final coat of varnish that is applied during the manufacturing of cars?
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