Paints and decorative materials are a mixture of insoluble materials that are suspended in an oily liquid medium or suspended in an aqueous emulsion medium. This medium consists of a group of organic or inorganic materials and the paint has a high adhesion strength to the surfaces to be painted.
Types of paints and decorative materials
Paints and decorative materials are classified into two main types:
Oil paints: - Where the liquid medium is of this type, which is an unsaturated fatty oil in some of its bonds, and this type is used to paint all surfaces.
Emulsion water-based paints: - The liquid medium they contain or their liquid emulsion medium is water, and this type of paint cannot be used on metal or plastic surfaces.
Installation of paints and decorative materials
Film: - The film represents the material that holds the components of the paint and binder, and it can be made of natural or artificial materials.
Natural film: The natural film consists of some natural resins such as natural gum, including madagascar gum, congo gum or mastic gum, and there are casein and dried vegetable oils such as linseed oil, soybean oil, coconut oil and castor oil whatever oils used should be Characteristic or have measurements represented in (Iodine No. 145, acidity from 3 to 8, saponification index 190, refractive index 1.48 N25).
Synthetic membrane: It consists of synthetic gum, tar, acrylic glue, urethane and alkyds. There are also chlorinated rubber and cellulose derivatives (cellulose esters and ethers).
Viscosity reducers: They are solvents prepared from hydrogen or ketone carbon and are added to the paint to reduce its viscosity, which facilitates the process of its preparation and application. It is known that these components evaporate at the end of the process, so they must have specifications.
Dehydration accelerators: - A group of materials that accelerate polymerization or oxidation reactions, allowing for acceleration of the drying process and the formation of the film that carries colors after its use. Among these accelerators that use certain salts of cobalt, magnesium, lead, some resins and certain compounds, linseed oil and R-tritol Each of the above-mentioned substances has a special mechanism of action.
Plasticizers: - Certain types of special oils play an important role in increasing the ductility of the films after drying. These plasticizers are particularly important in some paints with additive ratings between 20 and 70, and calendula, castor oil, and diphthalate are among the materials most used as plasticizers.
Loads: Loads play a very important role in
Work to give the paint the ability to cover and resist bad weather.
Work on the viscous tempering of the paint in order to control its use.
Work to absorb and reflect light rays to protect the oil-polymer network after drying.
The addition significantly reduces the cost of the materials that make up the films.