Main components of coatings

Film-forming material
Film-forming material is the basis of coatings. It plays a decisive role in coating and performance. Material can be used as the film's are many, and modern coating industry mainly uses the resin. Resin is a amorphous of organic, it usually refers to polymers. Now it widely uses synthetic resins, such as alkyd, epoxy resin, acrylic resin, chlorinated rubber resin.

Pigment



It is a main component of the color coatings. Pigments give film colors and make the coating has the ability to cover the coated object. Some pigments can provide properties such as improve the mechanical properties of paint films, improve paint durability, provide protection against corrosion, electrical conductivity, flame retardants and so on. Pigments can be divided into natural and synthetic pigments by source; according to chemical composition they are consists of inorganic and organic pigments; classified by role in the coating, they are colouring pigments, extenders and special pigments. Inorganic pigments is the most widely used one in coating, synthetic pigments are widely used also, now organic pigment developed rapidly.

Solvent
This chemical can dissolve or disperse film-forming substances into uniform liquid of paint so that construction into film. Solvent in principle does not constitute film and should not remain in the film. Many chemicals including water, inorganic compounds and organic compounds can be used as the solvent composition of coatings. Some of the solvents are added during the coatings manufacturing, some are added in the coatings construction.

Additives
Additives are also known as the auxiliary material component of coatings. But it can't form film independently. It as a component of the film and exist in the film after the coatings into film. It has improvement function to paint or coating of a particular aspect of performance improvement. Different varieties of coating use different additives, even paints of the same type, due to its purpose of use, method or performance requirements are different, it needs to use different additives. One kind of coating can use a variety of additives in order to play a different role. If you have interest of OKCHEM chemicals raw materials, please click here!

Additives of coating raw materials

Additives is one kind of coating raw materials. Adding small amount of additives can significantly improve the effectiveness and performance of coatings, as well as improve film performance. It must coordinate properties between keys so that coating with a variety of performances and special effects to meet these requirements. So fully grasp the main characteristics of raw materials such as resins, paints and solvents is the difficulties that the coating industry need to overcome. The fluidity of the paint, pigment dispersibility, leveling and clarity, ect relate to the coating effect.



Additives play an important role in the paint and coatings industry. It mainly to prevent mildew and improve coating performance. The use of additives is the key to improving the added value of products. However, improper use or add too much can cause the opposite effect. With the development of coatings industry, it requires to develop new products with high effective and performance.

The use of additives relate to coatings ingredients, add method and add quantity. First, it should fully know about the mechanism and select properly. For example, if adsorbed on the surface, it 's better to add additives before adsorb other materials on the surface; if hope to have Physical change, it should fully know about coatings materials and additives performance to select. Besides, if need to use the surface characteristics of materials to make the separation effect and orientation appropriate, it needs to use good miscible polymer resin. Therefore, it needs to compare the solubility parameters of resins and additives before using. As different additives has different functions.

Here are the most commonly used coating additives.

Acrylic coating The greatest characteristic of acrylic is that it can be diluted with water. It is water soluble material, colorless, odorless. It has considerable flexibility and malleability after conjunctival. It is exceptionally dense waterproof material.

Polyurethane coatings is called "liquid rubber". It is one of the best properties of waterproof coating. Film tough, high tensile strength, good elongation, corrosion resistance, strong resistance to structural expansion and has a long service life.

Polymer cement waterproof coating is compound of synthetic polymer emulsion, powders and various additives.

Mortar waterproof coatings based on acrylic emulsion with a special cement, additives and fillers made by a certain percentage distribution of waterborne waterproof mortar. It can directly work on the surface of concrete construction and paste. If you have interest, please follow okchem company linkedin page or read more here.