The distinction of paint and coating and component, kind
Paint: it is the common name that coating is according to national standard, because the paint of the past basically is natural vegetable oil (tung oil, rosin etc.) production, use paint this one name all the time for thousands of years.
With the continuous development of science and technology, a variety of synthetic resin has largely or completely replaced the use of vegetable oil, if the title "paint" some inappropriate, so the national standard to determine the use of "paint" this name as a general name of paint.
Paint: a liquid or solid material (a mixture with or without pigments) of organic polymer compounds or inorganic compounds that can be coated on a surface to form a solid, adhesive, continuous, protective, decorative, and special properties (such as insulation, anticorrosion, marking, etc.).
It is customary to use the word "lacquer" to represent paint for certain specific products.
For example: alkyd mixed paint, resin mixed paint, exterior wall latex paint, automobile paint, alkyd anti-rust paint, etc.
Composition of paint
Regardless of the variety and shape of paint, it is composed of the following three basic substances.
Film-forming substances: also known as binders, most of the film-forming substances are organic polymer compounds such as natural resin (rosin, Chinese lacquer), paint (tung oil, linseed oil, soybean oil, fish oil, etc.), synthetic resin and other mixed ingredients, after high temperature reaction, there are also inorganic composition of paint (such as: inorganic zinc-rich paint).
Description of film-forming material: the basic component of paint is the material that can independently form a solid film with a certain strength.
According to national standards, there are 17 types of film-forming substances:
(2) natural resin;
(3) phenolic resin;
(5) alkyd resin;
(6) amino resin;
(8) other cellulose;
(9) perchloroethylene resin;
(10) olefin resin;
(11) acrylic resin;
(12) polyester resin;
(13) epoxy resin;
(15) elemental organic matter;
The film-forming substance is the main body of the paint, which determines the performance of the paint film.
If there is no film forming material, pure pigments and auxiliary materials cannot form paint film.
Secondary film-forming substances: including various pigments, constitution pigments, anti-rust pigments.
Pigments can provide color and covering power for paint film, improve the protection performance and decorative effect of paint, and improve the service life of paint with good weather resistance.
Constitution pigment can increase the thickness of paint film, use its own "flake, needle-like" structure performance, through the accumulation of pigment overlapping, the formation of a fish-scale paint film, improve the service life of paint film, improve water resistance and anti-rust effect.
Through its own physical and chemical antirust action, antirust pigments can prevent the surface of objects from being corroded by atmosphere and chemical substances, and the surface of metals from being corroded.
Auxiliary film-forming substances: including various auxiliaries, solvents.
All kinds of additives play a very important role in the production process, storage process, use process and the formation of paint film.
Although the amount of use is very small, but the performance of the film has a great impact.
Water - based paint more need additives to meet the production, construction, storage and the formation of paint film.
The level of paint additives also represents the level of national paint.
Solvents, also known as "dispersion media" (including various organic solvents, water), are mainly diluted to form a viscous liquid for production and construction.
Often the mixture of film - forming substrate and dispersion medium is called paint.
Classification of paints
Paint product kind is quite various, the classification before did not have a kind of unified method, for this reason the country made unified classification standard, it is to paint in the film material as the basis for classification, if the film material has two or more than two, according to a kind of material that plays a major role in the paint film as the basis.
According to the main types of film-forming substances in the paint are mainly divided into nitrocellulose paint, polyurethane paint, etc.
Metallic paints are mainly enamel.
By the state, paint can be divided into water - based paint and oil - based paint.
Tanning paint, polyurethane paint and so on belong to oily paint more.
According to the action form cent, paint can be divided into volatile paint and non-volatile paint.
Press adornment effect to be able to be divided into varnish, lubricious paint and translucent paint 3 kinds, what varnish points to is the grain that still can see lumber itself after besmear is brushed finish and color, this kind of product applies to high-grade reach wooden grain considerable the furniture adornment with strong sex.
The paint film after besmear is finished is young and full, appearance is glittering and translucent get rid of appears, construction is simple, relaxed;
The color paint can cover the color of wood itself completely after besmear brushs namely, reflect the color of paint itself only.
This kind of product applies to splint or density board kind;
Translucent paint refers to the texture of the wood itself after the finish of the painting is visible and still has the effect of coloring.
This kind of product applies to the wooden door, window, furniture and so on with clear wood grain and loose wood.
According to wood conduit grain cent open mode (bottom repair color) and close mode (face repair color), open mode paint is a kind of completely exposed wood surface tube hole coating technology, its main component is polyurethane, the concentration is small, the performance is wood hole is obvious, the texture is clear, paint coating quantity is small, inferior light, natural simple sense is strong, can second repair.
But its cost is high, to spraying technology request is high.
Enclosed paint is the wood pipe hole is buried deep in transparent coating film layer for the main characteristics of a coating process, its main component is unsaturated resin, high concentration, performance for furniture surface coating film plump, thick, smooth surface.